10 GPRS mode tasks

05.083GPPRadio subsystem link controlTS

10.1 Cell Re-selection

In GPRS Standby and Ready states, cell re-selection is performed by the MS, except for a class A MS (see 3GPP TS 02.06) while in dedicated mode of a circuit switched connection, in which case the cell is determined by the network according to the handover procedures (see subclause 3). When the circuit switched connection is released, the MS shall resume cell re-selection (see subclause 6.7.1).

The cell re-selection procedures defined in subclauses 10.1.1 to 10.1.3 apply to the MSs attached to GPRS if a PBCCH exists in the serving cell.

If PBCCH does not exist, the criteria and algorithms defined in subclauses 10.1.2 and 10.1.3 shall also apply if GPRS cell re-selection parameters for one or more cells are provided to the MS in a Packet Cell Change Order or Packet Measurement Order message (see 04.60). In this case, the MS shall convert the idle mode cell re-selection parameters, received for the other cells according to clause 6, to GPRS cell re-selection parameters according to table 3a and use the same procedures, except that the MS may measure received signal strength in packet idle mode according to either subclause 6.6.1 or subclause 10.1.1.

Otherwise the MS shall perform cell re-selection according to the idle mode procedures defined in clause 6, except that the MS is only required to monitor full system information on BCCH of the serving cell if indicated by change mark on BCCH or PACCH. If PBCCH exists, the MS is not required to monitor system information on BCCH of the serving cell or any system information of the non-serving cells and only required to monitor system information on PBCCH of the serving cell if indicated by change mark on PBCCH, PCCCH or PACCH.

For both cases (with or without PBCCH), the details of system information monitoring are specified in 3GPP TS 04.60.

In packet transfer mode, the MS shall always measure received signal strength according to subclause 10.1.1.

In addition, the network may control the cell selection as defined in subclause 10.1.4.

The cells to be monitored for cell re-selection are defined in the BA(GPRS) list, which is broadcast on PBCCH. If PBCCH does not exist, BA(GPRS) is equal to BA(BCCH).

For a multi-RAT MS, cell re-selection to other radio access technologies shall also be possible. If PBCCH exists, the procedures in subclause 10.1.1.3 and 10.1.3.2 shall apply. Otherwise the idle mode procedures in subclause 6 shall apply.

10.1.1 Monitoring the received signal level and PBCCH data

The MS shall measure the received RF signal level on the BCCH carriers of the serving cell and the surrounding cells as indicated in the BA(GPRS) list and optionally the NC_FREQUENCY_LIST, and calculate the received level average (RLA_P) for each carrier.

In addition the MS shall verify the BSIC of the BCCH carriers. Only cells with allowed BSIC shall be considered for re-selection. The allowed BSIC is either a valid BSIC or, for cells in BA(BCCH) where no BSIC is broadcast, a BSIC with allowed NCC part (see subclause 7.2). A valid BSIC is a BSIC broadcast for that carrier in the BA(GPRS) list.

In addition to what is described in subclauses 10.1.1.1 and 10.1.1.2, an MS supporting SoLSA with SoLSA subscription shall attempt to decode BSIC for the 6 strongest carriers, with LSA IDs to which the MS subscribes. At least one carrier shall be searched every 5 minutes, one after another. In the case the MS has been able to decode the BSIC, the rules described in 10.1.3 shall be followed. The LSA IDs of the carriers are broadcast on PBCCH of the serving cell.

10.1.1.1 Packet idle mode

Whilst in packet idle mode (see 03.64) an MS shall continuously monitor all BCCH carriers as indicated by the BA(GPRS) list and the BCCH carrier of the serving cell. At least one received signal level measurement sample on each BCCH carrier shall be taken for each paging block monitored by the MS according to its current DRX mode and its paging group. As the minimum MS shall take one measurement for each BCCH carrier for every 4 second. As the maximum, the MS is however not required to take more than 1 sample per second for each BCCH carrier.

RLA_P shall be a running average determined using samples collected over a period of 5 s to Max {5s, five consecutive paging blocks of that MS}, and shall be maintained for each BCCH carrier. The same number of measurement samples shall be taken for all BCCH carriers, and the samples allocated to each carrier shall as far as possible be uniformly distributed over the evaluation period. At least 5 received signal level measurement samples are required for a valid RLA_P value.

The list of the 6 strongest non‑serving carriers shall be updated at a rate of at least once per running average period.

The MS shall attempt to check the BSIC for each of the 6 strongest non‑serving cell BCCH carriers at least every 14 consecutive paging blocks of that MS or 10 seconds, whichever is greater. If a change of BSIC is detected then the carrier shall be treated as a new carrier.

In the case of a multiband MS, the MS shall attempt to decode the BSIC, if any BCCH carrier with unknown BSIC is detected among the number of strongest BCCH carriers in each band as indicated by the parameter MULTIBAND_REPORTING (see subclause 8.4.3), broadcast on PBCCH, or if PBCCH does not exist, on BCCH.

When requested by the user, the MS shall determine which PLMNs are available as described in subclause 6.6.1. However, for MSs without DRX or with short DRX period (see 3GPP TS 05.02), considerable interruptions to the monitoring of PPCH or PCH can not be avoided.

10.1.1.2 Packet transfer mode

Whilst in packet transfer mode an MS shall continuously monitor all BCCH carriers as indicated by the BA(GPRS) list and the BCCH carrier of the serving cell. In every TDMA frame, a received signal level measurement sample shall be taken on at least one of the BCCH carriers, one after the another. Optionally, measurements during up to 8 TDMA frames per PDCH multiframe may be omitted if required for BSIC decoding or multi-RAT measurements.

RLA_P shall be a running average determined using samples collected over a period of 5 s, and shall be maintained for each BCCH carrier. The same number of measurement samples shall be taken for all BCCH carriers except, if the parameter PC_MEAS_CHAN indicates that the power control measurements shall be made on BCCH (see subclause 10.2.3.1.2), for the serving cell where at least 6 measurement samples shall be taken per 52-multiframe. The samples allocated to each carrier shall as far as possible be uniformly distributed over the evaluation period. At least 5 received signal level measurement samples are required for a valid RLA_P value.

In some allowed multislot configurations (see 3GPP TS 05.02) the MS is not able to perform normal received signal level measurements within the TDMA frame. In this case, the MS shall perform the measurements whenever possible according to its measurement capability (see 3GPP TS 05.02). For downlink packet transfer using any medium access mode (see 3GPP TS 04.60), the MS shall perform the measurements during the block period where the polling response is sent (Tra shall apply). For downlink or uplink packet transfer using fixed allocation medium access mode, the MS shall perform the measurements during inactivity periods defined by the assignment command (MEASUREMENT_MAPPING or ALLOCATION_BITMAP respectively, see 3GPP TS 04.60).

NOTE 1: The network is responsible for providing the necessary opportunities to ensure that the MS will perform the required number of measurements.

The MS shall attempt to check the BSIC for as many non‑serving cell BCCH carriers as possible and as often as possible, and at least every 10 seconds. A multi-RAT MS is allowed to extend this period to 13 seconds, if the neighbour cell list contains cells from other RATs and if indicated by the parameter 3G_SEARCH_PRIO. The MS shall use the two Idle frames of the PDCH multiframe for this purpose. These frames are termed “search” frames. A list containing BSIC and timing information for these strongest carriers at the accuracy required for accessing a cell (see 3GPP TS 05.10) including the absolute times derived from the parameters T1, T2, T3 shall be kept by the MS. This information may be used to schedule the decoding of BSIC and shall be used when re-selecting a new cell in order to keep the switching time at a minimum. When a BCCH carrier is found to be no longer among the reported, BSIC and timing information shall be retained for 10 seconds. (This is in case a cell re-selection command to this cell is received just after the MS has stopped reporting that cell, see subclause 10.1.4.2).

In some allowed multislot configurations (see 3GPP TS 05.02) the MS is not able to perform BSIC decoding or multi-RAT measurements. In this case, the MS may delay the requesting of uplink packet resources, skip the last transmission burst in the frame immediately preceding the idle frame or not receive some allocated downlink packet resources in order to comply to the requirement to search, verify and decode BSIC information, or in order to perform multi-RAT measurements.

If, after averaging measurement results over 4 PDCH multiframes (1 sec), the MS detects one or more BCCH carriers, among the 6 strongest, whose BSICs are not currently being assessed, then the MS shall as a matter of priority attempt to decode their BSICs.

In the case of a multiband MS, the MS shall attempt to decode the BSIC, if any BCCH carrier with unknown BSIC is detected among the number of strongest BCCH carriers in each band as indicated by the parameter MULTIBAND_REPORTING (see subclause 8.4.3), broadcast on PBCCH, or if PBCCH does not exist, on BCCH.

Thus an MS shall, for a period of up to 5 seconds, devote all search frames to attempting to decode these BSICs. If this fails then the MS shall return to confirming existing BSICs. Having re‑confirmed existing BSICs, if there are still BCCH carriers, among the six strongest, with unknown BSICs, then the decoding of these shall again be given priority for a further period of up to 5 seconds.

The MS shall be able to send the first packet random access (PRACH) at the latest 5+x seconds after a new strongest cell (which is part of the BA(GPRS)) has been activated under the following network conditions: Initial serving cell at RXLEV= -70 dBm, with 6 neighbours at RXLEV= -75 dBm. Then the new BCCH carrier is switched on at RXLEV= -60 dBm. x is the longest time it may take to receive the necessary system information on PBCCH in the new cell.

Note: Because of test equipment limitations it is acceptable to activate the new carrier to replace one of the 6 neighbours.

If either no BSIC can be decoded on a surrounding cell BCCH carrier, or the BSIC is not allowed, then the received signal level measurements on that channel shall be discarded and the MS shall continue to monitor that channel.

If a change of BSIC is detected on a carrier, then any existing received signal level measurement shall be discarded and the carrier shall be treated as a new carrier.

If the BSIC cannot be decoded at the next available opportunities re‑attempts shall be made to decode this BSIC. If the BSIC is not decoded for more than three successive attempts it will be considered lost and any existing received signal level measurement shall be discarded and the MS shall continue to monitor that carrier.

When PBCCH is not present in the serving cell and the network controlled cell reselection mode (see subclause 10.1.4) is not set to NC2, the MS shall attempt to decode the BCCH data block that contains the parameters affecting cell reselection for each of the strongest surrounding cell BCCH carriers for which BSIC has been decoded and is allowed, and for which cell selection parameters have not been provided in a Packet Measurement Order, Packet Cell Change Order or Packet System Information message, at least every 5 minutes. When the MS recognizes that a new carrier which meets these criteria has become one of the strongest, the BCCH data shall be decoded for the new carrier within 30 seconds.

10.1.1.3 Monitoring cells of other radio access technologies

For a multi-RAT MS, cells or frequencies with other radio access technologies may also be included in the GPRS 3G Cell Reselection list to be monitored (see 3GPP TS 04.60). This list may be modified by Packet Measurement Order or Packet Cell Change Order messages (see 3GPP TS 04.60). The network controls the measurements for reselection of those cells by the parameter Qsearch_P broadcast on PBCCH. Qsearch_P defines a threshold and also indicates whether these measurements shall be performed when RLA_P of the serving cell is below or above the threshold.

For this monitoring, the MS may use search frames that are not required for BSIC decoding or interference measurements in packet transfer mode. If indicated by the parameter 3G_SEARCH_PRIO, the MS may use up to 25 search frames per 13 seconds without considering the need for BSIC decoding or packet transfer mode interference measurements in these frames.

Both valid cells as defined in subclause 8.4.7, and any identified cell on a frequency for which not full identification is included in the GPRS 3G Cell Reselection list, shall be considered for re-selection.

In packet transfer mode, the MS shall be able to send the first access at the latest 10+x seconds after a new best UTRAN cell, which is part of the GPRS 3G Cell Reselection list, has been activated under the condition that there is only one UTRAN frequency in the list and that no new GSM cells are activated at the same time and under good radio conditions. x is the longest time it may take to receive the necessary system information in the new cell. For test purposes the following radio conditions can be used: Serving GSM cell at RXLEV= -70 dBm, with 6 GSM neighbours at RXLEV= -75 dBm. Then either an UTRAN FDD neighbour cell or an UTRAN TDD neighbour cell is switched on. The radio conditions for the UTRAN FDD cell are as follows (see TS 25.101 for definitions):

Parameter

Unit

UTRAN FDD Cell

CPICH_Ec/Ior

dB

-10

PCCPCH_Ec/Ior

dB

-12

SCH_Ec/Ior

dB

-12

PICH_Ec/Ior

dB

-15

DPCH_Ec/Ior

dB

-

OCNS

-0.94

dB

10

dBm/3.84 MHz

-70

CPICH_Ec/Io

dB

-10.4

CPICH RSCP

dBm

-70

FDD_GPRS_Qoffset

integer

5 (-12dB)

FDD_Qmin

integer

7 (-12 dB)

Qsearch_P

integer

7 (search always)

3G_SEARCH_PRIO

integer

1

Propagation Condition

AWGN

The radio conditions for the UTRAN TDD cell (3.84 Mcps) are as follows (see 3GPP TS 25.123 for definitions and for the values of the remaining configuration parameters):

Parameter

Unit

UTRA TDD Cell

(3.84 Mcps)

Timeslot Number

0

8

P-CCPCH_Ec/Ior

dB

-3

SCH_Ec/Ior

dB

-9

-9

SCH_toffset

integer

0

0

PICH_Ec/Ior

dB

-3

OCNS_Ec/Ior

dB

-3.12

-3.12

PCCPCH RSCP

dBm

-70

-70

TDD_Qoffset

integer

5 (-12 dB)

Qsearch_P

integer

7 (search always)

3G_SEARCH_PRIO

integer

1

Propagation Condition

AWGN

NOTE: On timeslot 8 the P-CCPCH is not transmitted; on that timeslot, the PCCPCH RSCP defines the power level of the beacon channel.

The allowed access time is increased by 5 seconds for each additional UTRAN frequency in the GPRS 3G Cell Reselection list and by the time required for BSIC decoding of new activated GSM cells. However, multiple UTRAN cells on the same frequency in the list does not increase the allowed access time.

In packet transfer mode, for some allowed multislot allocations (see 3GPP TS 05.02), identification of a TDD cell may not be guaranteed. In such cases, the MS may not be able to fulfil the requirement above. If after 5 seconds the MS has not been able to identify a TDD cell, the MS is allowed to stop searching for it in the current GSM cell.

In packet idle mode, the MS shall be able to identify and select a new best UTRAN cell on a frequency, which is part of the GPRS 3G Cell Reselection list, within 30 seconds after it has been activated under the condition that there is only one UTRAN frequency in the list and under good radio conditions. For test purposes the same radio conditions as for packet transfer can be used. The allowed time is increased by 30 seconds for each additional UTRAN frequency in the GPRS 3G Cell Reselection list. However, multiple UTRAN cells on the same frequency in the list does not increase the allowed time.

A multi-RAT MS shall be able to monitor 64 UTRAN cells, divided into (depending on the MS capability):

– FDD cells on up to 3 FDD frequencies, with a maximum of 32 cells per frequency; and/or
– TDD cells on up to 3 TDD frequencies, with a maximum of 32 cells per frequency.

In packet idle mode, the MS shall attempt to read and store UTRAN predefined configurations as specified for idle mode in subclause 6.6.4.

10.1.2 Cell Re-selection Criteria

The following cell re-selection criteria are used for GPRS, whereby (s) denotes the serving cell, and (ni) denotes the neighbour cells. Different parameter values may apply for each neighbour cell. One set of parameters is broadcast in each cell.

1) The path loss criterion parameter C1 is used as a minimum signal level criterion for cell re-selection for GPRS in the same way as for GSM Idle mode. C1 is the same as defined in subclause 6.4, except that

A = RLA_P ‑ GPRS_RXLEV_ACCESS_MIN
B = GPRS_MS_TXPWR_MAX_CCH ‑ P

The GPRS specific parameters GPRS_RXLEV_ACCESS_MIN and GPRS_MS_TXPWR_MAX_CCH for the serving cell and neighbour cells are broadcast on PBCCH of the serving cell (POWER OFFSET is not used).

2) The signal level threshold criterion parameter C31 for hierarchical cell structures (HCS) is used to determine whether prioritised hierarchical GPRS and LSA cell re-selection shall apply and is defined by:

C31(s) = RLA_P(s) – HCS_THR(s) (serving cell)
C31(n) = RLA_P(n) – HCS_THR(n) – TO(n) * L(n) (neighbour cell)

where HCS_THR is the signal threshold for applying HCS GPRS and LSA re-selection. HCS_THR is broadcast on PBCCH of the serving cell.

3) The cell ranking criterion parameter (C32) is used to select cells among those with the same priority and is defined by:

C32(s) = C1(s) (serving cell) C32(n) = C1(n) + GPRS_RESELECT_OFFSET(n) – TO(n) * (1-L(n)) (neighbour cell)
where

GPRS_RESELECT_OFFSET applies an offset and hysteresis value to each cell

TO(n) = GPRS_TEMPORARY_OFFSET(n) * H(GPRS_PENALTY_TIME(n) – T(n)).

L(n) = 0 if PRIORITY_CLASS(n) = PRIORITY_CLASS(s) 1 if PRIORITY_CLASS(n)  PRIORITY_CLASS(s)

H(x) = 0 for x < 0 1 for x  0 GPRS_TEMPORARY_OFFSET applies a negative offset to C31/C32 for the duration of GPRS_PENALTY_TIME after the timer T has started for that cell. T is defined in subclause 6.4.

GPRS_RESELECT_OFFSET, PRIORITY_CLASS, GPRS_TEMPORARY_OFFSET and GPRS_PENALTY_TIME are broadcast on PBCCH of the serving cell.

10.1.3 Cell Re-selection Algorithm

At least for every new sample or every second, whichever is the greatest, the MS shall update RLA_P and calculate the value of C1, C31 and C32 for the serving cell and the non‑serving cells. The MS shall make a cell re-selection if:

i) The path loss criterion parameter (C1) for the serving cell falls below zero.

ii) A non‑serving suitable cell (see 3GPP TS 03.22) is evaluated to be better than the serving cell. The best cell is the cell with the highest value of C32 among

– those cells that have the highest PRIORITY_CLASS among those cells that have highest LSA priority among those that fulfil the criterion C31  0, or

– all cells, if no cells fulfil the criterion C31  0.

If the parameter C32_QUAL is set, positive GPRS_RESELECT_OFFSET values shall only be applied to the neighbour cell with the highest RLA_P value of those cells for which C32 is compared above.

LSA priority is defined by the list of LSAs for the subscriber stored on the SIM (see 3GPP TS 11.11). Cells with no LSA priority, e.g. non-LSA cells, are given LSA priority lower than 0. The LSA priority and LSA ID(s) shall be considered only by an MS supporting SoLSA.

PRIORITY_CLASS, LSA ID(s) and C32_QUAL are broadcast on PBCCH of the serving cell.

When evaluating the best cell, the following hysteresis values shall be subtracted from the C32 value for the neighbour cells:

– in standby state, if the new cell is in the same routing area: 0.

– in ready state, if the new cell is in the same routing area: GPRS_CELL_RESELECT_HYSTERESIS. If the parameter C31_HYST is set, GPRS_CELL_RESELECT_HYSTERESIS shall also be subtracted from the C31 value for the neighbour cells.

– in standby or ready state, if the new cell is in a different routing area: RA_RESELECT_HYSTERESIS.

– in case of a cell re-selection occurred within the previous 15 seconds: 5 dB.

GPRS_CELL_RESELECT_HYSTERESIS, C31_HYST and RA_RESELECT_HYSTERESIS are broadcast on PBCCH of the serving cell.

Cell re-selection for any other reason (see 3GPP TS 03.22) shall take place immediately, but the cell that the MS was camped on shall not be returned to within 5 seconds if another suitable cell can be found. If valid RLA_P values are not available, the MS shall wait until these values are available and then perform the cell re-selection if it is still required. The MS may accelerate the measurement procedure within the requirements in subclause 10.1.1 to minimise the cell re-selection delay.

If no suitable cell is found within 10 seconds, the cell selection algorithm of 3GPP TS 03.22 shall be performed. Since information concerning a number of channels is already known to the MS, it may assign high priority to measurements on the strongest carriers from which it has not previously made attempts to obtain BCCH information, and omit repeated measurements on the known ones.

10.1.3.1 Abnormal cell reselection

In the event of an abnormal release with cell reselection (see 3GPP TS 04.60) when PBCCH exists, an abnormal cell reselection based on BA(GPRS) shall be attempted. The MS shall perform the following algorithm to determine which cell to be used for this cell reselection attempt.

If access to another cell is not allowed, i.e. RANDOM_ACCESS_RETRY bit is not set on the serving cell:

i) The abnormal cell reselection attempt shall be abandoned, and the algorithm of subclause 10.1.3 shall be performed.

If access to another cell is allowed, i.e. RANDOM_ACCESS_RETRY bit is set on the serving cell:

i) The received level measurement samples taken on the carriers indicated in the BA (GPRS) received on the serving cell in the last 5 seconds shall be averaged, and the carrier with the highest received level average (RLA) with permitted BSIC, i.e. the same as broadcast together with BA (GPRS), (see subclause 10.1.1), shall be taken.

ii) On this carrier the MS shall attempt to decode the PBCCH data block containing the parameters affecting cell selection.

iii) If the cell is suitable (see 3GPP TS 03.22), abnormal cell reselection shall be attempted on this cell.

iv) If the MS is unable to decode the PBCCH data block or if the conditions in iii) are not met, the carrier with the next highest received level average (RLA) with permitted BSIC shall be taken, and the MS shall repeat steps ii) and iii) above.

v) If the cells with the 6 strongest received level average (RLA) values with permitted BSICs have been tried but cannot be used, the abnormal cell reselection attempt shall be abandoned, and the algorithm of subclause 10.1.3 shall be performed.

The MS is under no circumstances allowed to access a cell to attempt abnormal cell reselection later than 20 seconds after the detection within the MS of the abnormal release causing the abnormal cell reselection attempt. In the case where the 20 seconds elapses without a successful abnormal cell reselection the attempt shall be abandoned, and the algorithm of subclause 10.1.3 shall be performed.

In the event of an abnormal release with cell reselection (see 3GPP TS 04.60) when only BCCH exists, the MS shall only perform the algorithm of subclause 10.1.3.

10.1.3.2 Algorithm for cell re‑selection from GSM to UTRAN

If the GPRS 3G Cell Reselection list includes UTRAN frequencies, the MS shall, at least every 5 second update the value RLA_P for the serving cell and each of the at least 6 strongest non-serving GSM cells.

The MS shall then reselect a suitable (see TS 25.304) UTRAN cell if:

– for a TDD cell the measured RSCP value exceeds the value of RLA_P for the serving cell and all of the suitable (see 3GPP TS 03.22) non-serving GSM cells by the value XXX_GPRS_Qoffset for a period of 5 s and

– for an FDD cell the following criteria are all met for a period of 5 s:

  1. its measured RSCP value exceeds the value of RLA_P for the serving cell and all of the suitable (see 3GPP TS 03.22) non-serving GSM cells by the value XXX_GPRS_Qoffset,
  2. its measured Ec/No value is equal or greater than the value FDD_Qmin, and
  3. its measured RSCP value is equal to or greater than FDD_RSCP_threshold, if supported by the MS.

In case of a cell reselection occurring within the previous 15 seconds, XXX_GPRS_Qoffset is increased by 5 dB.

where

– Ec/No and RSCP are the measured quantities, see subclause 8.1.5.

– FDD_RSCP_threshold equals Qrxlevmin + Pcompensation + 10 dB, if these parameters are available, otherwise - (criterion not effective).

– Qrxlevmin is the minimum required RX level in the UTRAN FDD cell (dBm), see 3GPP TS 25.304.

– Pcompensation is max(UE_TXPWR_MAX_RACH – P_MAX, 0) (dB), see 3GPP TS 25.304.

– UE_TXPWR_MAX_RACH is the maximum TX power level an MS may use when accessing the UTRAN FDD cell on RACH (dBm), see 3GPP TS 25.304.

– P_MAX is the maximum RF output power of the MS (dBm) in UTRAN FDD mode, see 3GPP TS 25.304.

– FDD_Qmin and XXX_GPRS_Qoffset are broadcast on PBCCH of the serving cell. XXX indicates other radio access technology/mode.

Note: The parameters required to determine if the UTRAN cell is suitable are broadcast on BCCH of the UTRAN cell.

The MS may store the UTRAN cell RSCP suitability criterion parameters above, whenever decoded from a UTRAN FDD cell of an equivalent PLMN. The most recently decoded parameters are valid reselection criteria towards all UTRAN FDD cells. This list of parameters shall be cleared after PLMN selection (see 3GPP TS 23.122).

Cell reselection to UTRAN shall not occur within 5 seconds after the MS has reselected a GSM cell from an UTRAN cell if a suitable GSM cell can be found.

If more than one UTRAN cell fulfils the above criteria, the MS shall select the cell with the greatest RSCP value.

10.1.4 Network controlled Cell re-selection

The network may request measurement reports from the MS and control its cell re‑selection. This is indicated by the parameter NETWORK_CONTROL_ORDER. The meaning of the different parameter values is specified as follows:

NC0 Normal MS control The MS shall perform autonomous cell re-selection.

NC1 MS control with measurement reports The MS shall send measurement reports to the network as defined in subclause 10.1.4.1.
The MS shall perform autonomous cell re-selection.

NC2 Network control The MS shall send measurement reports to the network as defined in subclause 10.1.4.1.
The MS shall only perform autonomous cell re-selection when the reselection is triggered by a downlink signalling failure as defined in subclause 6.5 or a random access failure as defined in 3GPP TS 04.18 and 3GPP TS 04.60.

RESET The MS shall return to the broadcast parameters. Only sent on PCCCH or PACCH.

The parameter values NC1 and NC2 only apply in Ready state. In Standby state, the MS shall always use normal MS control independent of the ordered NC mode.

A set of measurement reporting parameters (NETWORK_CONTROL_ORDER, NC_REPORTING_PERIOD(s) and optionally REPORT_TYPE, MULTIBAND_REPORTING, SERVING_BAND_REPORTING, XXX_MULTIRAT_REPORTING, XXX_REPORTING_OFFSET, XXX_REPORTING_THRESHOLD (XXX indicates frequency band or radio access technologies), REP_PRIORITY, REPORTING_RATE, INVALID_BSIC_REPORTING, SCALE_ORD, FDD_REP_QUANT, Qsearch_P and 3G_SEARCH_PRIO) is broadcast on PBCCH. This set of parameters may also be sent individually to an MS on PCCCH or PACCH in:

  • a PACKET MEASUREMENT ORDER message, in which case it overrides the NC parameters broadcast in the serving cell. These individual parameters should be considered valid only in the serving cell.
  • a PACKET CELL CHANGE ORDER message, in which case it overrides the NC parameters broadcast in the target cell. These individual parameters should be considered valid only in the target cell.

The individual parameters are valid until the RESET command is sent to the MS or there is a downlink signalling failure or the MS goes to the Standby state or the MS enters dedicated mode. Before the MS has acquired NC parameters when entering a new cell, it shall assume mode NC0 unless individual parameters were given by PACKET CELL CHANGE ORDER message in the previous cell.

A parameter NC_FREQUENCY_LIST may also be sent individually to an MS on PCCCH or PACCH. This list adds/deletes frequencies to the BA(GPRS) both for cell re-selection and for measurement reports. For added frequencies, the corresponding cell re-selection parameters may be included. The list is valid until an empty list is sent to the MS, there is a downlink signalling failure or the MS selects a new cell or the BA(GPRS) that is modified by the NC_FREQUENCY_LIST changes or the MS enters dedicated mode. A list given by Packet Cell Change Order applies in the new cell. The lists may also include cells with other radio access technologies.

All signalling for support of network controlled cell re-selection and measurement reports are defined in 3GPP TS 04.60.

10.1.4.1 Measurement reporting

When ordered to send measurement reports, the MS shall continuously monitor all carriers in BA(GPRS) or as indicated by the parameter NC_FREQUENCY_LIST and the BCCH carrier of the serving cell. The measurement requirements are defined in subclause 10.1.1 for the actual packet mode.

For each carrier, the measured received signal level (RXLEV) shall be the average of the received signal level measurement samples in dBm taken on that carrier within the reporting period. The reporting period is defined as follows:

– in packet idle mode, the reporting period is NC_REPORTING_PERIOD_I rounded off to the nearest smaller integer multiple of DRX period if NC_REPORTING PERIOD_I is greater than DRX period, else, the reporting period is DRX period;

– in packet transfer mode, the reporting period is indicated in NC_REPORTING_PERIOD_T.

In averaging, measurements made during previous reporting periods shall always be discarded. The start of the first reporting period may be random.

After each reporting period, the MS shall send a measurement report to BSS (see 3GPP TS 04.60). The MS shall then discard any previous measurement report, which it has not been able to send. Provided that the MS has received BSIC for all GSM neighbour cells, the parameter REPORT_TYPE indicates if the MS shall use Packet Measurement Report (normal reporting) or Packet Enhanced Measurement Report (enhanced reporting) (see 3GPP TS 04.60). The measurement report shall contain:

– RXLEV for the serving cell;

– in packet idle mode, the average interference level ch (see subclause 10.2.3.2.2) for the serving cell measured on the monitored PCCCH if a valid value is available. The mapping of ch to the reported I_LEVEL value is defined in subclause 10.3;

  • received signal level for the non-serving cells:
  • For normal measurement reporting, carriers shall be reported if they are among the 6 strongest carriers and BSIC is successfully decoded and allowed (see subclause 10.1.1), i.e. either equal to the BSIC of the list or with allowed NCC part of BSIC. In the latter case, which applies for BA(BCCH) where no BSIC is given, the decoded BSIC shall be included in the report. In the case of a multiband MS, the MS shall report the number of strongest BCCH carriers in each band as indicated by the parameter MULTIBAND_REPORTING (see subclause 8.4.3), broadcast on PBCCH, or if PBCCH does not exist, on BCCH. For multi-RAT MS, the MS shall report the number of best valid cells in each other radio access technology/mode as indicated by the parameters XXX_MULTIRAT_REPORTING, see subclause 8.4.7. In this case, the received signal level is replaced by the relevant measurement quantity (see subclause 8.1.5). Valid cells are defined in subclause 8.4.7;
  • For Enhanced Measurement Reporting, cells shall be reported if they are among the at least 6 strongest carriers, and BSIC is successfully decoded and valid (see subclause 10.1.1) or, if indicated by the parameter INVALID_BSIC_REPORTING, with known and allowed NCC part. The neighbour cells shall be reported according to the priority defined in subclause 8.4.8.1. For other radio access technology/mode, RXLEV is replaced by the relevant measurement quantity (see subclause 8.1.5);

– BSIC_SEEN (only for Enhanced Measurement Reporting).
Indicates if a GSM cell with invalid BSIC and allowed NCC part of the BSIC is one of the at least six strongest cells.

In the case of Packet Transfer mode with the NC_REPORTING_PERIOD_T = 0.48 s the MS shall report a new strongest GSM cell in the measurement report at the latest 5 s after a new strongest cell (which is part of the BA(GPRS)) has been activated under the following network conditions: Initial serving cell at RXLEV= -70 dBm, with 6 neighbours at RXLEV= -75 dBm. Then the new BCCH carrier is switched on at RXLEV= -60 dBm.

Note: Because of test equipment limitations it is acceptable to activate the new carrier to replace one of the 6 neighbours.

A UTRAN capable MS shall report a new best UTRAN cell, which is part of the neighbour cell list, at the latest 5 seconds after it has been activated under the condition that there is only one UTRAN frequency in the neighbour cell list and that no new GSM cells are activated at the same time and under good radio conditions. For test purposes the following radio conditions can be used:

Serving GSM cell at RXLEV= -70 dBm, with 6 GSM neighbours at RXLEV= -75 dBm. Then either an UTRAN FDD neighbour cell or an UTRAN TDD neighbour cell is switched on. The radio conditions for the UTRAN FDD cells are as follows (see TS 25.101 for definitions):

Parameter

Unit

UTRAN FDD Cell

CPICH_Ec/Ior

dB

-10

PCCPCH_Ec/Ior

dB

-12

SCH_Ec/Ior

dB

-12

PICH_Ec/Ior

dB

-15

DPCH_Ec/Ior

dB

-

OCNS

-0.94

dB

10

dBm/3.84 MHz

-70

CPICH_Ec/Io

dB

-10.4

CPICH RSCP

dBm

-70

FDD_MULTIRAT_
REPORTING

integer

1

Qsearch_P

integer

7 (search always)

3G_SEARCH_PRIO

integer

1

Propagation Condition

AWGN

The radio conditions for the UTRAN TDD cell (3.84 Mcps) are as follows (see 3GPP TS 25.123 for definitions and for the values of the remaining configuration parameters):

Parameter

Unit

UTRA TDD Cell

(3.84 Mcps)

Timeslot Number

0

8

P-CCPCH_Ec/Ior

dB

-3

SCH_Ec/Ior

dB

-9

-9

SCH_toffset

integer

0

0

PICH_Ec/Ior

dB

-3

OCNS_Ec/Ior

dB

-3.12

-3.12

PCCPCH RSCP

dBm

-70

-70

TDD_MULTIRAT_
REPORTING

integer

1

Qsearch_P

integer

7 (search always)

3G_SEARCH_PRIO

integer

1

Propagation Condition

AWGN

NOTE: On timeslot 8 the P-CCPCH is not transmitted; on that timeslot, the PCCPCH RSCP defines the power level of the beacon channel.

The allowed reporting time is increased by 5 seconds for each additional UTRAN frequency in the neighbour cell list and by the time required for BSIC decoding of new activated GSM cells. However, multiple UTRAN cells on the same frequency in the neighbour cell list does not increase the allowed reporting time.

In packet transfer mode, for some allowed multislot allocations (see 3GPP TS 05.02), identification of a TDD cell may not be guaranteed. In such cases, the MS may not be able to fulfil the requirement above. If after 5 seconds the MS has not been able to identify a TDD cell, the MS is allowed to stop searching for it in the current GSM cell.

10.1.4.2 Cell re-selection command

A cell re-selection command may be sent from the network to an MS. When the MS receives the command, it shall re-select the cell according to the included cell description and change the network control mode according to the command (see 3GPP TS 04.60). The command may include re-selection of another radio access technology/mode.

If an MS receives a cell re-selection command towards a GSM cell to which it is not synchronised, then the MS shall search for synchronisation information up to 300 ms. In case of failure, the MS shall return to the old cell and indicate a packet cell change failure (see 3GPP TS 04.60).

If a UTRAN capable MS receives a cell re-selection command towards a not known UTRAN cell (see 3GPP TS 25.133 and 3GPP TS 25.123), then the MS shall search for synchronisation information up to 800 ms. In case of failure, the MS shall return to the old cell and indicate a packet cell change failure (see 3GPP TS 04.60).

10.1.4.3 Exceptional cases

An MS in network control mode NC1 or NC2 may enter an exceptional case if a circuit switched connection is established, which takes precedence over GPRS cell re-selection. This includes an MS operating in DTM.

In such a case the MS is not required to send measurement reports according to subclause 10.1.4.1, and shall not obey any cell re-selection command.

Whenever the exceptional case ends, the MS shall resume the GPRS mode tasks as specified in sub-clause 10.

10.1.5 Extended Measurement reporting

The network may request measurement reports from the MS for other purposes than cell re‑selection. This is indicated by the parameter EXT_MEASUREMENT_ORDER. The meaning of the different parameter values is specified as follows:

EM0 The MS shall not perform extended measurements.

EM1 The MS shall send extended measurement reports to the network.

RESET The MS shall return to the broadcast parameters. Only sent on PCCCH, CPCCCH or PACCH.

All signalling for support of extended measurement reports are defined in 3GPP TS 04.60.

A set of measurement reporting parameters (EXT_MEASUREMENT_ORDER, EXT_FREQUENCY_LIST, EXT_REPORTING_PERIOD, EXT_REPORTING_TYPE, INT_FREQUENCY and NCC_PERMITTED) is broadcast on PBCCH or CPBCCH. The parameters may also be sent individually to an MS on PCCCH, CPCCCH or PACCH, in which case it overrides the broadcast parameters. The individual parameters are valid until the RESET command is sent to the MS, there is a downlink signalling failure or the MS selects a new cell.

When ordered to send extended measurement reports, the MS shall monitor all carriers as indicated by the parameter EXT_FREQUENCY_LIST. The parameter EXT_REPORTING_TYPE indicates one of three different types of reporting:

Type 1: Carriers that shall be reported if they are among the 6 strongest carriers regardless of whether BSIC was decoded or not. The measurement report shall contain received signal level and, if successfully decoded, BSIC.

Type 2: Carriers that shall be reported if they are among the 6 strongest carriers and BSIC is successfully decoded and with allowed NCC part as indicated by NCC_PERMITTED. The measurement shall contain received signal level and BSIC.

Type 3: Carriers that shall be reported without BSIC decoding. The measurement report shall contain received signal level. In addition interference may be reported for one carrier.

At least one received signal level measurement sample on each carrier shall be taken for each paging block monitored by the MS according to its current DRX mode and its paging group. If PBCCH does not exist, the MS is only required to take seven measurement samples per BS_PA_MFRMS multiframes. These measurements shall not reduce the rate of measurements for cell re-selection as defined in subclause 10.1.1.1, 6.6.1 or 12.4.1.1 respectively. However, in total the MS is not required to make more than 200 samples per second. For each carrier, the measured received signal level (RXLEV) shall be the average of the received signal level measurement samples in dBm taken on that carrier within the reporting period as indicated by the parameter EXT_REPORTING_PERIOD. In averaging, measurements made during previous reporting periods shall always be discarded. The start of the first reporting period may be random.

For report type 3, the parameter INT_FREQUENCY, if it exists and if PBCCH exists, indicates one carrier on which interference measurements shall be performed. For COMPACT, this carrier should be in the serving cell, otherwise the accuracy of interference measurement reporting may be compromised. The measurements shall be made in the search frames and PTCCH frames of the 52-multiframe as described in subclause 10.2.3.2.1. During at least two contiguous such frames (one of each type) per paging period, the MS shall make measurements on as many channels (timeslots) as possible on the indicated carrier, considering its DRX mode and multislot class. Averaging shall be done within the reporting period. For COMPACT, interference measurements shall be performed during PDTCH/PACCH blocks as described in subclause 10.2.3.2.1.

The measurement samples shall be taken, as uniformly distributed as possible for each carrier, during the first 480 ms of the reporting period or until 5 samples have been taken on each carrier, whichever is longer. If the MS is in packet transfer mode or in an exceptional case (see subclause 10.1.4.3.) when the measurements shall start, the MS shall wait until it returns to packet idle mode. If the MS enters packet transfer mode or an exceptional case during the measurement period, the measurements shall be discarded and the measurements restarted when the MS returns to packet idle mode. If the MS is not able to collect the required measurements during one reporting period due to its DRX period, it may continue the measurements during the next reporting period. In this case no report shall be sent in the first reporting period.

For type 1 and 2 reporting, the MS shall attempt to decode the BSIC for the 6 strongest carriers in each reporting period, as close to the measurements as possible. Priority shall however be given to decoding BSIC for cell re-selection to fulfil the requirements in subclauses 10.1.1.2 and 12.4.1.2.

After collecting the measurements for one reporting period, the MS shall send a measurement report to BSS (see 3GPP TS 04.60). The measurement report shall be sent independently of the packet mode but not in the exceptional cases defined in subclause 10.1.4.3.

10.2 RF Power Control

Sub-clauses 10.2.1 and 10.2.2 do not apply for the PDCH/H in Exclusive MAC mode while in DTM. In this case:

  • The MS shall apply the output power ordered by the network on the SACCH to all channels (both the TCH/H and the PDCH/H).
  • The network shall use the same output power on the dedicated connection and on all the blocks on the PDCH/H addressed to the MS. Blocks not addressed to the MS may be transmitted at a lower power level. As an exception, the bursts transmitted on the BCCH carrier shall be transmitted at the BCCH level.

NOTE: Power control is not applicable to point-to-multipoint services.

10.2.1 MS output power

The RF output power, PCH , to be employed by the MS on each individual uplink PDCH shall be:

PCH = min(0 – CH –  * (C + 48), PMAX), (1)

where

CH is an MS and channel specific power control parameter, sent to the MS in an RLC control message (see 3GPP TS 04.60). For those uplink PDCHs, for which CH has not been defined, value 0 shall be used.

0 = 39 dBm for GSM 400, GSM900, GSM850
= 36 dBm for DCS1 800 and PCS 1900

 is a system parameter, broadcast on PBCCH or optionally sent to MS in an RLC control message (see 3GPP TS 04.18 and 3GPP TS 04.60).

C is the normalised received signal level at the MS as defined in 10.2.3.1.

PMAX is the maximum allowed output power in the cell =
GPRS_MS_TXPWR_MAX_CCH if present,
MS_TXPWR_MAX_CCH otherwise

All power values are expressed in dBm.

When the MS receives new CH or  values, the MS shall use the new value to update PCH according to equation (1) 2 radio blocks after the end of the frame containing the last timeslot of the message block containing the new value, which ensures 2 blocks time for processing even in case of timeslot reconfiguration.

The MS may round the calculated output power to the nearest nominal output power value (see 3GPP TS 05.05) although a higher resolution is preferred. The output power actually transmitted by the MS shall fulfil the absolute accuracy as specified in 05.05. In addition, the transmitted power shall be a monotonic function of the calculated output power and any change of 2 dB in the calculated value shall correspond to a change of 2 1.5 dB in the transmitted value.

The MS shall use the same output power on all four bursts within one radio block.

When accessing a cell on the PRACH or RACH (random access) and before receiving the first power control parameters during packet transfer on PDCH, the MS shall use the output power defined by PMAX.

MS_TXPWR_MAX_CCH is broadcast on the BCCH of the cell. A class 3 DCS1 800 MS shall add to it the value POWER OFFSET broadcast on the BCCH.

GPRS_MS_TXPWR_MAX_CCH is broadcast on PBCCH or CPBCCH of the serving cell and in case of DTM, sent on SACCH and optionally on main DCCH.

If the MS accesses a cell on the PRACH before receiving GPRS_MS_TXPWR_MAX_CCH on PBCCH, the MS shall determine PMAX using MS_TXPWR_MAX_CCH as default.

If a calculated output power is not supported by the MS, the MS shall use the supported output power which is closest to the calculated output power.

10.2.2 BTS output power

Downlink power control can only be used when the serving BCCH or CPBCCH and the used PDCH frequencies are in the same frequency band.

On the PDCHs that contain PBCCH or PCCCH, the BTS shall use constant output power, which may be lower than the output power used on BCCH. The power reduction (Pb) used on PCCCH, relative to the output power used on BCCH, is broadcast on PBCCH. For COMPACT, on the blocks that contain CPBCCH, CPCCCH, CFCCH, or CSCH, the BTS shall use constant output power.

On PTCCH/D, the BTS shall use the same output power as for PBCCH, or BCCH if PBCCH does not exist. As an exception to this, the output power for some of the PTCCH/D blocks may be lower in some cases (e.g. with adaptive antennas), but with no requirements for the MS to decode them. The network is however responsible to provide each MS with required TA information.

On other PDCH radio blocks, downlink power control may be used. The BTS shall use the same output power on all four bursts within one radio block except for bursts transmitted on the BCCH carrier. Thus, a procedure may be implemented in the network to control the output power of the downlink transmission based on the Channel Quality Reports.

On PDCHs that do not contain PBCCH or PCCCH and do not use downlink power control (as indicated in the assignment message), the BTS shall use a constant output power with the exception that it is not required to transmit on every block. If the output power used on the transmitted blocks is not equal to (BCCH level – Pb) then the MS is not required to fulfil 3GPP TS 05.05 requirements for the first 25 blocks addressed to this MS.

Two methods of downlink power control exist. Power control mode A can be used for any allocation method. Power control mode B can only be used for fixed allocation. The method used is determined by the BTS_PWR_CTRL_MODE as sent in the assignment command.

In both power control mode, parameter P0 is used: P0 is defined as a power reduction relative to BCCH or CPBCCH and is included in the assignment message. The value of P0 is not allowed to change during Packet Transfer Mode except in the case a reassignment or a new assignment is established not including any of the previously allocated PDCH(s). An MS shall only have one P0 value and one power control mode at a time.

On each PDTCH/D block, the PR field of the MAC header, if present and if downlink power control is used, shall indicate the output power level used to send this block (see 3GPP TS 04.60). There shall be two PR management cases, PR mode A and PR mode B, as indicated by the PR_MODE parameter in the assignment (see 3GPP TS 04.60) :

– in PR mode A, the PR field of a block is calculated based on the BTS output power level in the direction of the addressed (RLC information) MS;

– in PR mode B, for each block sent on a given PDCH, the BTS shall use the same output power level for all the MS with TBF on this PDCH.

The network shall not be allowed to change between PR modes during a TBF. The network shall only allocate to an MS one PR_MODE at a time.

NOTE: Correct MS behaviour can not be assumed if PR mode B is used with adaptive antennas.

The MS is required to meet the 05.05 specification under the following conditions:

For synchronization purpose, the network shall ensure that each MS with an active TBF in uplink or downlink receives at least one block transmitted with a coding scheme and a modulation that can be decoded by that MS every 360 millisecond interval (78 TDMA frames) If downlink power control is used, this block shall be transmitted with an output power which is consistent with the downlink power control mode used and

– in PR mode A, this block shall be addressed (RLC information) to this MS and shall contain a usable PR field (i.e. not set to Not usable as specified in 3GPP TS 04.60);

– in PR mode B, this block shall contain a usable PR field (i.e. not set to Not usable as specified in 3GPP TS 04.60) and does not necessarily have to be addressed to any particular MS.

If power control mode A is used, the BTS shall limit its output power on blocks addressed to a particular MS (USF or RLC blocks) to levels between (BCCH level – P0dB) and (BCCH level – P0dB – 10dB). For other blocks the output power shall not exceed (BCCH level – P0dB). For COMPACT, the BCCH level shall be replaced by the CPBCCH level in these formulas. The output power must be sufficient for the MS for which the RLC block is intended as well as the MS(s) for which the USF is intended (see 3GPP TS 04.60).

In PR mode A, the PR value shall be calculated relative to the P0 value of the MS to which the RLC block is addressed.

In PR mode B, the network shall use the same P0 value for all the MS with a TBF established on the same PDCH. Consequently, the PR value shall be calculated relative to this P0 value.

If power control mode B is used, the full BTS power output range may be used. Further, the BTS shall adhere to the following:

– (BCCH level – P0dB) is the initial downlink BTS output power;

– the power shall be the same on all blocks addressed to a particular multislot MS (RLC information) within a TDMA frame;

– for the sequence of downlink blocks addressed to a particular MS, the network shall change the BTS output power of such blocks no faster than one nominal power control step every 60 ms (13 TDMA frames). Further, when the network changes the BTS output power from level X to level Y for the sequence of downlink blocks addressed to a particular MS, the network shall transmit at least one block addressed to the MS at each BTS power output level between level X and level Y on at least one of the PDCHs allocated to this MS;

– the output power must be sufficient for the MS for which the RLC block is intended;

– the output power on the timeslot immediately preceding each burst of a block addressed to one MS, and belonging to the same multislot allocation, shall not exceed the output power of that block by more than 10 dB.

As an exception to the rules above for both modes, the bursts transmitted on the BCCH carrier shall be transmitted at the BCCH level.

In DTM multislot configurations, when power control mode A is used, if the BTS output power for the CS timeslot is not within the range from the maximum downlink power allowed for the MS on the PS timeslot(s) to a power level 10 dB lower, the MS is not required to fulfil the requirements in 3GPP TS 05.05 on the CS timeslot and/or the PS timeslot(s).

10.2.3 Measurements at MS side

A procedure shall be implemented in the MS to monitor periodically the downlink Rx signal level and quality from its serving cell.

10.2.3.1 Deriving the C value

10.2.3.1.1 Packet idle mode

In packet idle mode, the MS shall periodically measure the received signal level of the PCCCH or, if PCCCH is not existing, the CCCH or, for COMPACT, the CPCCCH or CPBCCH, CFCCH, and CSCH. The MS shall measure the received signal level of each paging block monitored by the MS according to its current DRX mode and its paging group.

The normalised C value for each radio block is calculated:

Cblock,n = SSblock,n + Pb (2)

where

SSblock,n is the mean of the received signal level of the four normal bursts that compose the block.

Pb is the BTS output power reduction (relative to the output power used on BCCH) used on the channel on which the measurements are performed. For PCCCH, Pb is broadcast on PBCCH. If frequency hopping is being used on the associated physical channel, Pb shall be reduced by 25% for each burst in the block which is received on the BCCH frequency. For BCCH and for COMPACT, Pb =0 (not broadcast).

Finally, the Cblock,n values are filtered with a running average filter:

Cn = (1-a)  Cn-1 + a  Cblock,n,

where a is the forgetting factor:

a = 1/MIN(n, MAX(5, TAVG_W*NDRX)).

NDRX = the average number of monitored blocks per multiframe according to its current DRX mode and its paging group (see 3GPP TS 05.02).

TAVG_W is broadcast on PBCCH or, if PBCCH does not exist, on BCCH, or on CPBCCH. BS_PA_MFRMS is broadcast on BCCH. SPLIT_PG_CYCLE is defined at GPRS attach.

n is the iteration index. The filter shall be restarted with n=1 for the first sample every time a new cell is selected. Otherwise, when entering packet idle mode, the filter shall continue from the n and Cn values obtained during packet transfer mode. The filter shall also continue from its previous state if NDRX is changed.

The current Cn value shall be used in formula (1) to calculate the output power when the MS transfers its first radio block.

10.2.3.1.2 Packet transfer mode

In packet transfer mode, the MS shall use the same received signal level measurements as made for cell reselection on the BCCH carrier of the serving cell (see 10.1.1.2) or, for COMPACT, on the CPBCCH carrier of the serving cell (see 12.4.1.2). The measurements shall be filtered with a running average filter:

Cn = (1-b)  Cn-1 + b  SS n,

where

SSn is the received signal level of the measurement samples.

b is the forgetting factor:

b = 1/(6*TAVG_T).

n is the iteration index. When entering packet transfer mode, the filter shall continue from the n and Cn values obtained during packet idle mode.

If indicated by the parameter PC_MEAS_CHAN, the MS shall instead measure the received signal level of each radio block on one of the PDCH monitored by the MS for PACCH. If downlink power control is used, PC_MEAS_CHAN shall indicate measurements on the BCCH or CPBCCH, or the MS is not required to fulfil 05.05 requirements. The MS may discard new PC_MEAS_CHAN values received during packet transfer mode. For each downlink radio block Cblock,n shall be derived according to formula (2) (if PBCCH does not exist, and for COMPACT, Pb = 0). Finally, the Cblock,n values are filtered with a running average filter:

Cn = (1-c)  Cn-1 + c  Cblock,n,

where c is the forgetting factor:

c = 1/(12*TAVG_T).

n is the iteration index. When entering packet transfer mode, the filter shall continue from the n and Cn values obtained during packet idle mode.

NOTE 1: This method is suitable in the case where BCCH or CPBCCH is in another frequency band than the used PDCHs.

The current Cn value shall be used to update formula (1) each time a new Cn value is obtained or whenever the MS applies new CH or  values.

For each correctly received block on one of the PDCHs monitored by the MS, the MS shall calculate the variance of the received signal level as:

BL_VARn = 1/(j-1)*SUM(SSk – SSblock,n)2, k = 1,…,4

where SSk is the received signal level of burst k within the block.

SSblock,n is the mean of the received signal level of the j normal bursts that compose the radio block.

j is the number of bursts in the radio block = 4.

If frequency hopping is used and 1 burst of the block is received on the BCCH carrier, that burst shall be discarded from the calculation (j = 3). If 2 bursts are received on the BCCH carrier, the whole block shall be discarded. If 3 bursts are received on the BCCH carrier, the other burst shall be discarded (j = 3).

If more than one PDCH are monitored the MS shall for each block period try to find one correctly received block for the BL_VAR calculation. The block may be taken from any of the monitored PDCHs.

The reported value, SIGN_VAR, shall be the average of BL_VAR within the reporting period. The first reporting period starts with and includes the first assignment message for an uplink or downlink transfer. The reporting period ends, and the subsequent reporting period starts, no earlier than two blocks before the transmission of a quality report and no later than one block before the transmission of a quality report. In averaging, measurements made during previous reporting periods shall always be discarded.

SIGN_VAR shall be included in the channel quality report (see subclause 10.2.3.2.3). If the channel quality report is included in a PACKET RESOURCE REQUEST message, which is retransmitted due to lack of response (see 3GPP TS 04.60), the same SIGN_VAR value shall be repeated and no new reporting period shall be started. This will ensure that a valid SIGN_VAR value exists.

An MS, performing an uplink transfer using half duplex mode (see 04.60 for definition of half duplex mode), is not required to make received signal level measurements and shall thus update PCH during its uplink allocation, only when it receives new CH values. The MS shall in this case use the last Cn value measured before the uplink transfer.

TAVG_T and PC_MEAS_CHAN are broadcast on PBCCH or, if PBCCH does not exist, on BCCH or on CPBCCH.

10.2.3.2 Derivation of Channel Quality Report

The channel quality is measured as the interference signal level during idle frames of the multiframe, when the serving cell is not transmitting. No measurements shall be taken on the BCCH carrier of the serving cell since the BTS transmits with constant output power on this carrier. For COMPACT, the channel quality is measured as the interference signal level during a PDTCH or PACCH block (see Annex C). No measurements shall be taken on the CPBCCH, CPCCCH, PTCCH, CFCCH, or CSCH since the BTS of the neighbouring co-channel cells either does not transmit or transmits with constant output power.

10.2.3.2.1 Packet transfer mode

In packet transfer mode, the MS shall measure the interference signal level on the same carrier as the assigned PDCHs. The MS shall make these measurements during the search frames and PTCCH frames, which are not required for BSIC decoding or the timing advance procedure. For COMPACT, the MS shall estimate the interference level during PDTCH/PACCH bursts (see Annex C).

Additionally, a multi-RAT MS is allowed to ignore interference signal level measurements in search frames according subclause 10.1.1.3.

The MS shall perform interference signal measurements on as many of the channels (timeslots) as possible and as a minimum:

For multislot class type 1 MS (see 3GPP TS 05.02), on the PDCH timeslot numbers TSmin to TSmax, where

TSmin = the lowest numbered timeslot allocated for uplink or downlink transfer including downlink PACCH associated with an uplink transfer.

TSmax = MIN(TSmin + Rx –1, 7).

Rx = the maximum number of receive timeslots that the MS can use per TDMA frame according to its multislot class (see 3GPP TS 05.02).

For multislot class type 2 MS (see 3GPP TS 05.02), on the maximum number of receive timeslots (Rx) that the MS can use per TDMA frame according to its multislot class (see 3GPP TS 05.02), in the following priority order, except that no measurements are required on any timeslot number below those with priority 1:

  1. the PDCH timeslot numbers assigned for downlink transfer including the downlink PACCH associated with an uplink transfer;
  2. the PDCH timeslot numbers assigned for uplink transfer;
  3. other timeslots that would be possible to add for downlink transfer to the current allocation according to the MSs multislot class. If more then one combination of timeslots is possible according to this rule, it is implementation dependent which combination to chose.

Interference measurement timeslots have lower priority than real receiver or transmit timeslot and are not compulsory in case of conflict.

For each channel, every measurement SSCH,n shall consist of the minimum of the two signal level samples from one search frame and one PTCCH frame. These two measurements should be spaced as closely as possible, but there is no requirement that they shall be contiguous. Thus the SACCH frames are avoided (except for a physical channel with two TCH/Hs) and only the interference is measured. For COMPACT, for each channel, at least two interference measurement sample, SSCH,n, shall be taken every multiframe.

The measured interference shall be averaged in a running average filter:

CH,n = (1-d)  CH,n-1 + d  SSCH,n, CH, 0 = 0

where d is the forgetting factor:

d = 1/MIN(n, NAVG_I).

n is the iteration index.

The filter shall be restarted with n=1 for the first sample every time a new cell is selected. If the measurements on a channel is interrupted due to a change of packet mode (transfer or idle), the last obtained n and CH,n values shall be saved. When entering packet transfer mode, the filter shall continue from the values obtained during packet idle mode for those channels that are measured in both modes. If frequency hopping is used, channels that only differ in MAIO shall be considered the same. For the other channels, if the measurements are resumed for the same channel within NAVG_I/2 multiframes, the filter shall continue from the saved values. Otherwise the filter shall be restarted. Channel reassignment during packet transfer mode shall be considered as start of a new packet transfer mode preceded by a zero length packet idle mode.

For each channel, the MS shall perform at least NAVG_I (rounded to the nearest integer) measurements of SSCH,n before valid CH values can be determined

During GPRS downlink TBF transfer, the MS shall measure the received signal quality as defined in subclause 8.2. The reported value, RXQUAL, shall be the average within the reporting period. Only successfully decoded blocks intended for that MS shall be included in the average. Alternatively, if CS4 is used, the MS is allowed to report RXQUAL = 7. The first reporting period starts with and includes the first assignment message for the downlink transfer. The reporting period ends, and the subsequent reporting starts, no earlier than two blocks before the transmission of a quality report and no later than one block before the transmission of a quality report. In averaging, measurements made during previous reporting periods shall always be discarded.

During EGPRS downlink TBF transfer, the MS shall measure the received signal quality as defined in subclause 8.2. The quality parameters shall be, for the radio blocks intended for this MS only (of which the right TFI could be decoded: see 3GPP TS 04.60), individually averaged per channel (timeslot) and per modulation type as follows:

Where: n is the iteration index, incremented per each downlink radio block.

Rn denotes the reliability of the filtered quality parameters.

e is the forgetting factor defined below.

xn denotes the existence of quality parameters for the nth block, i.e. if the radio block is intended for this MS. xn values 1 and 0 denote the existence and absence of quality parameters, respectively.

In case BEP_PERIOD2 is received and with a field value different than 15, e shall be defined as e2 according to BEP_PERIOD2 as shown in the table below. This allows for individual filtering per MS.

In case BEP_PERIOD2 is received and with the field value 15 (norm), e shall be defined as e1 according to BEP_PERIOD as shown in the table below. This allows for normal filtering (non-individual). This BEP_PERIOD2 shall be used by the considered MS in the serving cell, until a new BEP_PERIOD2 is received by this MS in the same cell, or the MS leaves the cell or the MS enters packet idle mode.

Field value

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

BEP_PERIOD

Reserved

25

20

15

12

10

7

5

4

3

2

1

e1

0.08

0.1

0.15

0.2

0.25

0.3

0.4

0.5

0.65

0.8

1

BEP_PERIOD2

Norm

90

70

55

40

25

20

15

12

10

7

5

4

3

2

1

e2

e1

0.03

0.04

0.05

0.065

0.08

0.1

0.15

0.2

0.25

0.3

0.4

0.5

0.65

0.8

1

BEP_PERIOD2 is sent to individual MS on PACCH D/L. See 3GPP TS 04.60.

BEP_PERIOD is broadcast on PBCCH or, if PBCCH does not exist, on BCCH.

An MS shall report the overall MEAN_BEP, and CV_BEP per modulation type averaged over all allocated channels (timeslots) as follows:

where n = the iteration index at reporting time

j = the channel number.

When entering packet transfer mode and/or when selecting a new cell, the filters shall reset the values of n to 0. When a new timeslot is allocated for a downlink TBF, the filters shall reset the values of MEAN_BEP n-1 , CV_BEP n-1 and R n-1 to 0 for this timeslot.

The MS shall transfer the 8 CH values and the RXQUAL, C and SIGN_VAR values (see subclause 10.2.3.1.2) to the network in the Channel Quality Report sent on PACCH. An MS using EGPRS shall instead of RXQUAL and SIGN_VAR send MEAN_BEP and CV_BEP. The MS shall report MEAN_BEP and CV_BEP for the modulations, GMSK and/or 8-PSK (i.e. GMSK_MEAN_BEP, GMSK_CV_BEP; and/or 8PSK_MEAN_BEP, 8PSK_CV_BEP respectively), for which it has received blocks since it last sent a measurement report to the network. Additionally, the MS shall report per slot measurements (MEAN_BEP_TNx) according to what the network has ordered (see 3GPP TS 04.60). The reporting period ends no earlier than two blocks for a GPRS TBF mode and three blocks for an EGPRS TBF mode before the transmission of a quality report and no later than one block before the transmission of a quality report.

NAVG_I is broadcast on PBCCH or, if PBCCH does not exist, on BCCH or CPBCCH.

10.2.3.2.2 Packet idle mode

In packet idle mode, the MS shall measure the interference signal level on the channels indicated by the parameter INT_MEAS_CHANNEL_LIST and, for an MS performing measurements according to subclause 10.1.4.1, on the monitored PCCCH or CPCCCH and, if indicated in the EXT_FREQUENCY_LIST, on one additional carrier (see subclause 10.1.5). INT_MEAS_CHANNEL_LIST is optionally broadcast on PBCCH or CPBCCH. The MS shall perform interference measurements on as many of the indicated basic physical channels (see 3GPP TS 05.02) as possible. For each frequency or mobile allocation independently, the minimum requirement is:

  • for multislot class type 1 MS (see 3GPP TS 05.02), on the PDCH timeslot numbers TSmin to TSmax, where
    TSmax = MIN(TSmin + Rx – 1, 7), and TSmin is selected so that as many as possible of the indicated timeslots are measured. Rx is the maximum number of receive timeslots that the MS can use per TDMA frame according to its multislot class (see 3GPP TS 05.02);
  • for multislot class type 2 MS (see 3GPP TS 05.02), on the maximum number of receive timeslots (Rx) that the MS can use per TDMA frame according to its multislot class (see 3GPP TS 05.02). It is implementation dependent which timeslots are measured.

If the MS monitors PCCCH/CPCCCH or PBCCH/CPBCCH in the block preceding or succeeding the measurement frame, the MS may select the measurement timeslots such that the monitored timeslot is within the range from the lowest to the highest measured timeslot number. If INT_MEAS_CHANNEL_LIST does not exist and the MS is not performing measurements according to subclause 10.1.4., the MS is not required to perform any interference measurements. If PBCCH or CPBCCH do not exist, the MS is not required to perform interference measurements.

These measurements shall be made in the search frames and the PTCCH frames. During each paging period, if such frames are available and not required for BSIC decoding or PCCCH monitoring, the MS shall make the required measurements on at least one of the following carriers: carriers in the INT_MEAS_CHANNEL_LIST, monitored PCCCH and the carrier indicated in the EXT_FREQUENCY_LIST. The measurements (SSCH,n) for each channel shall be made on contiguous search and PTCCH frames (one of each type) and averaged in the same way as described in subclause 10.2.3.2.1. The measurements shall, as far as possible, be uniformly distributed over the measurement period.

For COMPACT, these measurements shall be made during PDTCH/PACCH blocks and averaged in the same way as described in subclause 10.2.3.2.1. During each paging period, the MS shall make one measurement (SSCH,n) on each indicated channel (timeslot) on at least one of the following carriers: carriers in the INT_MEAS_CHANNEL_LIST, monitored CPCCCH and the carrier indicated in the EXT_FREQUENCY_LIST. The measurements for each channel shall be made, as far as possible, uniformly distributed over the measurement period.

The filter shall be restarted with n=1 for the first sample every time a new cell is selected. If the measurements on a channel is interrupted due to a change of packet mode (transfer or idle), the last obtained n and CH,n values shall be saved. When entering packet idle mode, the filter shall continue from the values obtained during packet transfer mode for those channels that are measured in both modes for channel quality report. If frequency hopping is used, channels that only differ in MAIO shall be considered the same. For the other channels, if the measurements are resumed for the same channel within KC*NAVG_I/4 multiframes or KC*NAVG_I/2 paging periods, whichever is greater, the filter shall continue from the saved values. Otherwise the filter shall be restarted. KC is the number of carriers in the INT_MEAS_CHANNEL_LIST.

For each channel, the MS shall perform at least NAVG_I (rounded to the nearest integer) measurements of SSCH,n before valid CH values can be determined.

NAVG_I is broadcast on PBCCH or, if PBCCH does not exist, on BCCH or CPBCCH.

10.2.3.2.3 Measurement reporting

The MS shall send a Channel Quality Report to the network in the PACKET DOWNLINK ACK/NACK and the PACKET RESOURCE REQUEST messages. The report contains the available CH values for the carrier on which the message is sent as well as the RXQUAL, C and SIGN_VAR values (see subclause 10.2.3.1.2). The conditions for including the different values, which are not always mandatory, are specified in 3GPP TS 04.60. The mapping of ch to the reported I_LEVEL value is defined in subclause 10.3.

10.2.4 Measurements at BSS side

A procedure shall be implemented in the BSS to monitor the uplink Rx signal level and quality on each uplink PDCH, active as well as inactive.

The BSS shall also measure the Rx signal level and the quality of a specific MS packet transfer.

10.3 Measurement requirements

The accuracy of the received signal level and interference measurements shall be as defined in subclause 8.1.2. For COMPACT, the accuracy of the interference estimate, which is based upon received signal level during a PDTCH/PACCH block (see Annex C), is ± 2 dB in addition to the accuracy of the received signal level defined in subclause 8.1.2 without downlink power control activated on the serving cell. The measured signal strength values shall be mapped to the reported C values as defined for RXLEV in subclause 8.1.4. If included in a PACKET MEASUREMENT REPORT message, the measured interference level, gCH, shall be mapped to a reported I_LEVEL as defined for RXLEV in subclause 8.1.4. If included in a PACKET DOWNLINK ACK/NACK or a PACKET RESOURCE REQUEST message, the measured interference level, gCH, shall be mapped to a reported I_LEVEL value between 0 and 15, relative to reported C value as follows:

I_LEVEL 0 = interference level is greater than C
I_LEVEL 1 = interference level is less than or equal to C and greater than C – 2 dB
I_LEVEL 2 = interference level is less than or equal to C – 2 dB and greater than C – 4 dB
:
:
I_LEVEL 14 = interference level is less than or equal to C – 26 dB and greater than C – 28 dB
I_LEVEL 15 = interference level is less than or equal to C – 28 dB

For COMPACT, a mobile station shall not be required to meet the specified interference estimate accuracy requirements if the TSCs for PDTCH/PACCH blocks on primary and secondary carriers that are indicated in EXT_FREQUENCY_LIST by parameter INT_FREQUENCY and in INT_MEAS_CHAN_LIST (see subclauses 10.1.5 and 10.2.3.2.2 of this specification), are not equal to the BCC, as defined in 3GPP TS 03.03 and as described in 3GPP TS 05.02. For COMPACT, the supporting of interference measurements is optional except for allocated channels.

10.4 Control parameters

The parameters employed to control the radio links for GPRS are shown in table 3.

Table 3: Radio sub-system link control parameters for GPRS
((s) and (n) denote serving cell and non-serving cell respectively)

Parameter name

Description

Range

Bits

Channel

BA(GPRS)

BCCH Allocation for GPRS re-selection

Note: If PBCCH does not exist,
BA(GPRS) = BA(BCCH)

PBCCH D/L

BSIC(s+n)

Base station Identification Code for carriers in BA(GPRS) and the serving BCCH carrier

0‑63

6

PBCCH D/L
(**)

MS_TXPWR_MAX_CCH

See table 1.

0-31

5

BCCH D/L

POWER OFFSET(s)

See table 1.

0‑3

2

BCCH D/L

RXLEV_ACCESS_MIN

See table 1.

0‑63

6

BCCH D/L

GPRS_MS_TXPWR_MAX_CCH(s+n)

The maximum TX power level an MS may use when accessing the system

0-31

5

PBCCH D/L

GPRS_RXLEV_ACCESS_MIN(s+n)

Minimum received signal level at the MS required for access to the system.

0‑63

6

PBCCH D/L

GPRS_RESELECT_OFFSET
(n)

Applies an offset and hysteresis to the C32 re-selection criterion.
-52, -48,…, -12, -10,…, 12, 16, …,48 dB

0-31

5

PBCCH D/L

PRIORITY_CLASS (s+n)

The HCS priority for the cells

0-7

3

PBCCH D/L

LSA ID (s+n)

The LSA identities for the cells

PBCCH D/L

HCS_THR(s+n)

HCS signal level threshold
-110, -108,…, -50, infinity dBm

0-31

5

PBCCH D/L

GPRS_TEMPORARY_OFFSET(n)

Applies a negative offset to C32 for the duration of PENALTY_TIME.
0, 10,…, 60 dB, infinity

0‑7

3

PBCCH D/L

GPRS_PENALTY_TIME(n)

Gives the duration for which the temporary offset is applied. 10, 20,…, 320 seconds

0‑31

5

PBCCH D/L

GPRS_CELL_RESELECT_
HYSTERESIS

Additional hysteresis applied in Ready state for cells in the same RA. 0, 2,…, 14 dB

0-7

3

PBCCH D/L

RA_RESELECT_HYSTERESIS

Additional hysteresis applied for cells in different RAs. 0, 2,…, 14 dB

0-7

3

PBCCH D/L

CELL_RESELECT_HYSTERESIS

Additional hysteresis applied for cells in different RAs if PCCCH does not exist.
See table 1.

0-7

3

BCCH D/L

C32_QUAL

Flag indicating an exception rule for GPRS_RESELECT_OFFSET

1/0

1

BBCCH D/L

C31_HYST

Flag indicating if hysteresis shall be applied to C31.

1/0

1

PBCCH D/L

MULTIBAND_REPORTING

The number of carriers from each frequency band that shall be included in the list of 6 strongest cells or in the measurement report.

0-3

2

PBCCH D/L
BCCH D/L

Power control parameter
0,0.1,…,1

0-10

4

PBCCH D/L
(**)

Pb

Power reduction used by BTS on PBCCH blocks, relatively to the output power used on BCCH 0, -2,…, -30 dB

0-15

4

PBCCH D/L

PC_MEAS_CHAN

Flag that indicates whether the downlink measurements for power control shall be made on BCCH or PDCH.

0/1

1

PBCCH D/L
(**)

TAVG_W

Signal level filter period for power control in packet idle mode
2(k/2)/ 6 multiframes, k = 0,1,…, 25

0-25

5

PBCCH D/L
(**)

TAVG_T

Signal level filter period for power control in packet transfer mode

2(k/2)/ 6 multiframes, k = 0,1,…, 25

0-25

5

PBCCH D/L
(**)

NAVG_I

Interference signal level filter constant for power control 2(k/2), k = 0,1,…, 15

0-15

4

PBCCH D/L
(**)

(continued)

Table 3 (concluded): Radio sub‑system link control parameters for GPRS

Parameter name

Description

Range

Bits

Channel

BEP_PERIOD

Filter constant for EGPRS Channel quality measurements. See subclause 10.2.3.2.1

0-15

4

PBCCH D/L

(**)

BEP_PERIOD2

Filter constant for EGPRS Channel quality measurements. See subclause 10.2.3.2.1

0-15

4

PACCH D/L

INT_MEAS_CHANNEL_LIST

Channel list for interference measurements in packet idle mode

PBCCH D/L
(**)

NETWORK_CONTROL_ORDER

Controls cell re-selection and measurement reporting

0-3

2

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

NC_FREQUENCY_LIST

Frequency list for cell re-selection measurement reporting

PCCCH D/L
PACCH D/L

NC_REPORTING_PERIOD_I
NC_REPORTING_PERIOD_T

Time period for measurement reporting
0.48, 0.96, 1.92, …, 61.44 seconds

0-7

3

PBCCH D/L PCCCH D/L
PACCH D/L
(**)

EXT_MEASUREMENT_ORDER

Controls extended measurement reporting

0-3

2

PBCCH D/L
PCCCH D/L
PACCH D/L

EXT_FREQUENCY_LIST

Frequency list for extended measurement reporting

PBCCH D/L
PCCCH D/L
PACCH D/L

EXT_REPORTING_PERIOD

Time period for measurement reporting
60, 120, 240,…, 7680 seconds

0-7

3

PBCCH D/L PCCCH D/L
PACCH D/L

EXT_REPORTING_TYPE

Defines the type of extended measurement report

1-3

2

PBCCH D/L PCCCH D/L
PACCH D/L

INT_FREQUENCY

Frequency for which the MS shall include interference measurements in extended measurement report type 3

0-31

5

PBCCH D/L PCCCH D/L
PACCH D/L

NCC_PERMITTED

Bit map of NCC part of BSIC for which the MS shall report extended measurements.

8

PBCCH D/L PCCCH D/L
PACCH D/L

SCALE

Indication of the offset, which applies for the reported RXLEV values.

0 = 0 dB, 1 = +10 dB

0-1

1

PACCH U/L

SCALE_ORD

Indication of the offset, which shall be used for the reported RXLEV values.

0 = +0 dB, 1 = + 10 dB, 2 = automatic

Default value = 0 dB.

0-2

2

PBCCH D/L
PCCCH D/L

PACCH D/L
(**)

CELL_BAR_ACCESS_2

See table 3b

0/1

1

PBCCH D/L

Qsearch_P

Search for 3G cells if signal level below threshold (0-7):
– 98, – 94, … , – 74 dBm,  (always)
or above threshold (8-15):
– 78, – 74, … , – 54 dBm,  (never).
Default value =  (never).

0-15

4

PBCCH D/L PCCCH D/L
PACCH D/L
(**)

XXX_GPRS_Qoffset

Applies an offset to RLA_P for cell re‑selection to access technology/mode XXX (one or more),
0 = –  (always select a cell if acceptable),
1 = -28 dB, 2 = -24 dB, … , 15 = 28 dB.
Default value = 0 dBm.

0-15

4

PBCCH D/L

FDD_Qmin

A minimum threshold for Ec/No for UTRAN FDD cell re-selection,
0= -20dB, 1= -6dB, 2= -18dB, 3= -8dB, 4= -16dB, 5= -10dB, 6= -14dB, 7= -12dB.

Default value= -12dB.

0-7

3

PBCCH D/L

XXX_MULTIRAT_REPORTING

The number of cells from the access technology/mode XXX (one or more) that shall be included in the measurement report.

0-3

2

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

SERVING_BAND_REPORTING

The number of cells from the GSM serving frequency band that shall be included in the measurement report.

0-3

2

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

REPORT_TYPE

Indicates which report type the MS shall use,
0 = enhanced, 1 = normal.
Default value = normal.

0/1

1

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

REP_PRIORITY

Indicates the reporting priority per cell,
0 = normal, 1 = high

0/1

1

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

REPORTING_RATE

Indicates the allowed reporting rate,
0 = normal, 1 = reduced

0/1

1

PBCCH D/L PCCCH D/L
PACCH D/L
(**)

INVALID_BSIC_REPORTING

Indicates if GSM cells with invalid BSIC and allowed NCC part may be reported,

0 = no, 1 = yes

0/1

1

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

XXX_REPORTING_THRESHOLD

Apply priority reporting if the reported value is above threshold for GSM frequency band or access technology/mode XXX (one or more),
0, 6, … , 36,  (never).
Default value = always.

0-7

3

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

XXX_REPORTING_OFFSET

Apply en offset to the reported value when prioritising the cells for reporting for GSM frequency band or access technology/mode XXX (one or more), 0, 6, … , 42 dB.
Default value = 0 dB.

0-7

3

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

FDD_REP_QUANT

Indicates the reporting quantity for UTRAN FDD cells,
0 = RSCP, 1 = Ec/No

0/1

1

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

3G_SEARCH_PRIO

Indicates if 3G cells may be searced when BSIC decoding is required,
0 = no, 1 = yes

Default value = yes

0/1

1

PBCCH D/L
PCCCH D/L
PACCH D/L
(**)

RTD

The real time difference to other GSM cells, modulo 51 TDMA frames,
step: 1 or 1/64 TDMA frame

0-50
or
0-3263

6
or
12

PBCCH D/L

(**)

NOTE: (**) These parameters occur also on BCCH if PBCCH does not exist.

Table 3a: Conversion from idle mode to GPRS cell re-selection parameters

GPRS Parameter name

Conversion from idle mode parameters

GPRS_RXLEV_ACCESS_MIN

RXLEV_ACCESS_MIN

GPRS_MS_TXPWR_MAX_CCH

MS_TXPWR_MAX_CCH

C31

0

GPRS_RESELECT_OFFSET(n)

CELL_RESELECT_OFFSET(n) – CELL_RESELECT_OFFSET(s)

GPRS_TEMPORARY_OFFSET

TEMPORARY OFFSET

GPRS_PENALTY_TIME

PENALTY_TIME

PRIORITY_CLASS

0

C32_QUAL

0

GPRS_CELL_RESELECT_HYSTERESIS

CELL_RESELECT_HYSTERESIS

RA_RESELECT_HYSTERESIS

CELL_RESELECT_HYSTERESIS 

XXX_GPRS_Qoffset

XXX_Qoffset 

NOTE: If PENALTY_TIME = 11111 for a cell, the sign of CELL_RESELECT_OFFSET shall be changed and TEMPORARY OFFSET set to 0 for that cell.

Table 3b: Parameters affecting cell priority for cell selection and re-selection

CELL_BAR ACCESS_2

Cell selection priority

Status for cell reselection

0

Normal

Normal

1

Barred

Barred

NOTE 1: A low priority cell is only selected if there are no suitable cells of normal priority (see 3GPP TS 03.22).