6.8 PTM-M Data Transfer
03.643GPPGeneral Packet Radio Service (GPRS)Overall description of the GPRS radio interfaceStage 2TS
NOTE: The stage 3 specification for PTM-M data transfer is left for phase 2 of GPRS specification.
PTM-M data, in the form of individual LLC frames, is mapped into RLC/MAC-PTM_DATA primitive and distributed from SGSN to the BSS representing the cells that are defined by a geographical area parameter. To the cells concerned, the BSS for each PTM-M LLC frame:
– Optionally, sends a “PTM-M new message" indicator on all individual paging channels on PCCCH if allocated, otherwise on CCCH. The indication refers to a PTM-M notification channel PNCH on PCCCH or NCH on CCCH, where a notification for the new PTM-M message can be received.
If the indicator option is not supported, or if an MS can not receive the indicator when expected, e.g. because the corresponding block in the multiframe structure is used for other purposes than paging, the MS must read the notification channel.
– Sends a PTM-M notification on PNCH or NCH. The notification has the form of a Packet Resource Assignment for the PTM-M LLC frame. The notification includes a group identity IMGI, a unique LLC frame identifier (in the form of an N-PDU number together with a segment offset, see GSM 04.65) and an allocation of a TFI to be used in all RLC blocks of the LLC frame.
– Transmits the PTM-M LLC frame on the assigned downlink resources.
Transfer of PTM-M data is carried out without any ARQ on the RLC/MAC and LLC layers. Instead, each LLC frame is retransmitted a specified number of times. For each retransmission, the above procedure is performed. The PTM-M notification (resource assignment) includes the unique LLC frame identifier as in the first transmission but a new allocation of TFI.
An MS accumulates correctly received RLC blocks from each transmission to assemble an LLC frame.
The dimensioning of PNCH shall be scaleable depending on capacity requirements.
An NCH may, if capacity allows, be used as a shared notification channel for PTM-M and Advanced Speech Call Items (ASCI).
An MS only interested in PTM-M needs to listen only to PNCH/NCH.
Annex A (informative):
Bibliography
1) ITU-T I.130, Method for the Characterization of Telecommunication Services Supported by an ISDN
2) ITU-T Q.65, Stage 2 of the Method for Characterization of the Services Supported by an ISDN
3) DIS 8886, OSI Data Link Service Definition
4) DIS 10022, OSI Physical Service Definition
5) ISO 10039, Medium Access Control Service Definition
6) ISO 4335, HDLC Procedures
7) ISO 7478, Multilink Procedures
8) ISO 7498, OSI Basic Reference Model and Layer Service Conventions
Annex B (informative):
Change history
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SPEC |
SMG# |
CR |
PHA |
VERS |
NEW_VER |
SUBJECT |
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03.64 |
s22 |
NEW |
2+ |
2.1.1 |
5.0.0 |
GSM 03.64 GPRS Stage 2 Radio |
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03.64 |
s23 |
A022 |
R97 |
5.0.0 |
5.1.0 |
Unacknowledged mode of RLC/MAC operation |
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03.64 |
s23 |
A023 |
R97 |
5.0.0 |
5.1.0 |
Improved RLC Service Primitives |
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03.64 |
s23 |
A024 |
R97 |
5.0.0 |
5.1.0 |
Enhancements to dynamic allocation |
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03.64 |
s23 |
A025 |
R97 |
5.0.0 |
5.1.0 |
Clarifications to DRX |
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03.64 |
s23 |
A026 |
R97 |
5.0.0 |
5.1.0 |
Optimisation for network control cell reselection |
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03.64 |
s23 |
A027 |
R97 |
5.0.0 |
5.1.0 |
Abnormal Cases in GPRS MS Ready State: Leaky Bucket Procedure |
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03.64 |
s23 |
A029 |
R97 |
5.0.0 |
5.1.0 |
Multiframe structure (details) (revision of SMG2 GPRS 301/97) |
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03.64 |
s23 |
A030 |
R97 |
5.0.0 |
5.1.0 |
Abnormal Cases in GPRS MS Ready State |
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03.64 |
s23 |
A031 |
R97 |
5.0.0 |
5.1.0 |
Cell Re-Selection in GPRS |
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03.64 |
s23 |
A032 |
R97 |
5.0.0 |
5.1.0 |
Definition of PACCH |
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03.64 |
s23 |
A033 |
R97 |
5.0.0 |
5.1.0 |
Clarifications on Timing advance procedure |
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03.64 |
s23 |
A035 |
R97 |
5.0.0 |
5.1.0 |
Bit order for USF coding in GPRS |
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03.64 |
s23 |
A036 |
R97 |
5.0.0 |
5.1.0 |
PTM-M |
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03.64 |
s23 |
A037 |
R97 |
5.0.0 |
5.1.0 |
Contention resolution |
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03.64 |
s23 |
A039 |
R97 |
5.0.0 |
5.1.0 |
Deleting parameter XHYST |
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03.64 |
s24 |
A031 |
R97 |
5.1.0 |
5.2.0 |
Clarification on the use of hysteresis for cell re-selection |
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03.64 |
s25 |
A043 |
R97 |
5.2.0 |
6.0.0 |
Clarification of the use of TAI |
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03.64 |
s25 |
A049 |
R97 |
5.2.0 |
6.0.0 |
USF granularity for dynamic allocation |
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03.64 |
s26 |
R97 |
6.0.0 |
6.0.1 |
Editorial changes for Publication |
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03.64 |
s27 |
A050 |
R97 |
6.0.1 |
6.1.0 |
Changes on all chapters to align the spec. with other GPRS specifications. |
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03.64 |
s27 |
A044 |
R97 |
6.0.1 |
6.1.0 |
Clarification on PACCH allocation for fixed assignment |
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03.64 |
s28 |
A052 |
R97 |
6.1.0 |
6.2.0 |
PBCCH scheduling and editorial corrections |
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03.64 |
s28 |
A051 |
R97 |
6.1.0 |
6.2.0 |
Interference measurements on network control |
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03.64 |
s28 |
A053 |
R97 |
6.1.0 |
6.2.0 |
51-multiframe PBCCH |
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03.64 |
s29 |
A055 |
R97 |
6.2.0 |
6.3.0 |
Miscellaneous corrections |
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03.64 |
s29 |
A056 |
R97 |
6.2.0 |
6.3.0 |
Clarification of polling response |
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03.64 |
s29 |
A057 |
R97 |
6.2.0 |
6.3.0 |
Correction to 1 phase access contention resolution |
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03.64 |
s29 |
A054 |
R99 |
6.2.0 |
8.0.0 |
Introduction of Enhanced GPRS (EGPRS) |
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03.64 |
s30 |
A066 |
2 |
8.0.0 |
8.1.0 |
MT packet transfer |
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03.64 |
s30 |
A058 |
8.0.0 |
8.1.0 |
EGPRS fine tuning |
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03.64 |
s30 |
A059 |
1 |
8.0.0 |
8.1.0 |
EDGE Compact Cell Reselection |
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03.64 |
s30 |
A060 |
1 |
8.0.0 |
8.1.0 |
EDGE Compact logical channels |
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03.64 |
s30bis |
A067 |
8.1.0 |
8.2.0 |
Correction for EGPRS |
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03.64 |
s30bis |
A068 |
8.1.0 |
8.2.0 |
Introduction of Incremental Redundancy between different coding schemes in EGPRS |
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03.64 |
s31 |
A069 |
8.2.0 |
8.3.0 |
GPRS & SMS-CB interworking |
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03.64 |
s31bis |
A070 |
R99 |
8.3.0 |
8.4.0 |
8-PSK support in UL |
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03.64 |
s32 |
A072r2 |
R99 |
8.4.0 |
8.5.0 |
DTM: Stage 2 Description |
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September 2000 TSG-GERAN |
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03.64 |
G01 |
A073 |
1 |
8.5.0 |
8.6.0 |
CR 03.64-A073 rev 1 DTM (R99) |
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03.64 |
G01 |
A074 |
8.5.0 |
8.6.0 |
CR 03.64-A074 DTM+EGPRS (R99) |
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03.64 |
G01 |
A075 |
1 |
8.5.0 |
8.6.0 |
CR 03.64-A075 rev 1 DTM: alignments (R99) |
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03.64 |
G03 |
A077 |
8.6.0 |
8.7.0 |
Removal of Anonymous Access |
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03.64 |
G03 |
A078 |
1 |
8.6.0 |
8.7.0 |
Correction to the ordering of E/FBI bits |
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03.64 |
G04 |
A080 |
1 |
8.7.0 |
8.8.0 |
Applicability of GPRS requirements to EGPRS |
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03.64 |
G07 |
A083 |
8.8.0 |
8.9.0 |
Coding rate of MCS-3 |
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03.64 |
G07 |
A084 |
8.8.0 |
8.9.0 |
Clarification of EGPRS MS USF decoding |
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03.64 |
G08 |
A085 |
1 |
8.9.0 |
8.10.0 |
Network requirements for MS synchronisation |
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03.64 |
G14 |
A086 |
1 |
8.10.0 |
8.11.0 |
Padding for MCS-8 retransmissions |
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03.64 |
G19 |
A088 |
2 |
8.11.0 |
8.12.0 |
Change of DTM core capability |