08.183GPPBase Station System (BSS) - Serving GPRS Support Node (SGSN)BSS GPRS ProtocolGeneral Packet Radio Service (GPRS)Release 1999TS

The figures and text in this section describe the Information Elements contents.

11.1 General structure of the information elements

Refer to General Structure Of The Information Elements/3GPP TS 08.16 [16].

11.2 Information element description

Refer to Information Element Description/3GPP TS 08.16 [16].

11.3 Information Element Identifier (IEI)

An Information Element Identifier (IEI) is identified by the same coding in all BSSGP PDUs.

Table 11.1: IEI types

11.3.1 Alignment octets

The Alignment Octets are used to align a subsequent IEI onto a 32 bit boundary. The element coding is:

Table 11.2: Alignment octets IE

a) The Length Indicator may indicate that from 0 to 3 spare octets are present.

11.3.2 Bmax default MS

This information element indicates the default bucket size (Bmax) in octets for an MS. The element coding is:

Table 11.3: Bmax default MS IE

The Bmax field is coded as in section 3GPP TS 08.18 BVC Bucket Size/Bmax.

11.3.3 BSS Area Indication

This element is used to indicate that the paging shall be done in all the cells within the BSS. The element coding is:

Table 11.4: BSS Area Indication IE

The coding of octet 2 is a binary number indicating the Length of the remaining element.

The coding of octet 3 shall not be specified. The recipient shall ignore the value of this octet.

11.3.4 Bucket Leak Rate (R)

This information element indicates the leak rate (R) to be applied to a flow control bucket. The element coding is:

Table 11.5: Bucket Leak Rate IE

The R field is the binary encoding of the rate information expressed in 100 bits/sec increments, starting from 0 x 100 bits/sec until 65 535 x 100 bits/sec (6 Mbps).

11.3.5 BVC Bucket Size

This information element indicates the maximum bucket size (Bmax) in octets for a BVC. The element coding is:

Table 11.6: BVC Bucket Size IE

The Bmax field is the binary encoding of the bucket-size information expressed in 100 octet increments, starting from 0 x 100 octets until 65 535 x 100 octets (6 Mbytes).

11.3.6 BVCI (BSSGP Virtual Connection Identifier)

The BVCI identifies a BVC. The element coding is:

Table 11.7: BVCI IE

11.3.7 BVC Measurement

This information element describes average queuing delay for a BVC. The element coding is:

Table 11.8: BVC Measurement IE

The Delay Value field is coded as a 16-bit integer value in units of centi-seconds (one hundredth of a second). This coding provides a range of over 10 minutes in increments of 10 msec. As a special case, the hexadecimal value 0xFFFF (decimal 65 535) shall be interpreted as "infinite delay".

11.3.8 Cause

The Cause information element indicates the reason for an exception condition. The element coding is:

Table 11.9: Cause IE

Table 11.10: Cause coding

11.3.9 Cell Identifier

This information element uniquely identifies one cell. The element coding is:

Table 11.11: Cell Identifier IE

11.3.10 Channel needed

This information element is coded as defined in 3GPP TS 09.18. It is relevant to circuit-switched paging requests. The element coding is:

Table 11.12: Channel needed IE

11.3.11 DRX Parameters

This information element contains MS specific DRX information. The element coding is:

Table 11.13: DRX Parameters IE

11.3.12 eMLPP-Priority

This element indicates the eMLPP-Priority of a PDU. The element coding is:

Table 11.14: eMLPP-Priority IE

11.3.13 Flush Action

The Flush action information element indicates to the SGSN the action taken by the BSS in response to the flush request. The element coding is:

Table 11.15: Flush Action IE

Table 11.16: Action coding

11.3.14 IMSI

This information element contains the International Mobile Subscriber Identity. The element coding is:

Table 11.17: IMSI IE

11.3.15 LLC-PDU

This information element contains an LLC-PDU. The element coding is:

Table 11.18: LLC-PDU IE

11.3.16 LLC Frames Discarded

This element describes the number of LLC frames that have been discarded inside a BSS. The element coding is:

Table 11.19: LLC Frames Discarded IE

11.3.17 Location Area

This element uniquely identifies one Location Area. The element coding is:

Table 11.20: Location Area IE

The coding of octet 2 is a binary number indicating the Length of the remaining element.

11.3.18 LSA Identifier List

This information element uniquely identifies LSAs. The element coding is:

Table 11.48: LSA Identifier List IE

11.3.19 LSA Information

This information element uniquely identifies LSAs, the priority of each LSA and the access right outside these LSAs. The element coding is:

Table 11.48: LSA Information IE

11.3.20 Mobile Id

The element coding is:

Table 11.21: Mobile Id IE

11.3.21 MS Bucket Size

This information element indicates an MS’s bucket size (Bmax). The element coding is:

Table 11.22: MS Bucket Size IE

The Bmax field is coded as in section 3GPP TS 08.18 BVC Bucket Size/Bmax.

11.3.22 MS Radio Access Capability

This information element contains the capabilities of the ME. The element coding is:

Table 11.23: MS Radio Access Capability IE

11.3.23 OMC Id

The element coding is:

Table 11.24: OMC Id IE

11.3.24 PDU In Error

The element coding is:

Table 11.25: PDU In Error IE

11.3.25 PDU Lifetime

This information element describes the PDU Lifetime for a PDU inside the BSS. The element coding is:

Table 11.26: PDU Lifetime IE

The Delay Value field is coded as in section 3GPP TS 08.18 BVC Measurement/Delay Value.

11.3.26 PDU Type

The first octet of a BSSGP PDU shall contain the PDU type IE. The PDU type IE is one octet long.

Table 11.27: PDU Types

11.3.27 Priority

This element indicates the priority of a PDU. The element coding is:

Table 11.28: Priority IE

11.3.28 QoS Profile

This information element describes the QoS Profile associated with a PDU. The element coding is:

Table 11.29: QoS Profile IE

a) The bit rate 0 (zero) shall mean "best effort" in this IE.

"Precedence" is coded as shown below (complying with 3GPP TS 03.60).

Table 11.30: Precedence coding

All values not allocated are reserved. All reserved values shall be interpreted as value 010.

"A-bit" is coded as shown below.

Table 11.31: "A bit" coding

"T-bit" is coded as shown below.

Table 11.32: "T bit" coding

"C/R-bit" is coded as shown below.

Table 11.24: "C/R bit" coding

11.3.29 Radio Cause

This information element indicates the reason for an exception condition on the radio interface. The element coding is:

Table 11.33: Radio Cause IE

Table 11.34: Radio Cause value

11.3.30 RA-Cap-UPD-Cause

The RA-Cap-UPD-Cause indicates the success of the RA-CAPABILITY-UPDATE procedure or the reason of the failure. The element coding is:

Table 11.35: RA-Cap-UPD-Cause IE

Table 11.36: RA-Cap-UPD Cause value

11.3.31 Routeing Area

This element uniquely identifies one routeing area. The element coding is:

Table 11.37: Routeing Area IE

The coding of octet 2 is a binary number indicating the Length of the remaining element.

11.3.32 R_default_MS

This information element indicates the default bucket leak rate (R) to be applied to a flow control bucket for an MS. The element coding is:

Table 11.38: R_default_MS IE

The R_default_MS field is coded as in section 3GPP TS 08.18 Bucket Leak Rate /R Value.

11.3.33 Suspend Reference Number

The Suspend Reference Number information element contains an un-formatted reference number for each suspend/resume transaction. The element coding is:

Table 11.39: Suspend Reference Number IE

The Suspend Reference Number is an un-formatted 8 bit field.

11.3.34 Tag

This information element is used to correlate request and response PDUs. The element coding is:

Table 11.40: Tag IE

11.3.35 Temporary logical link Identity (TLLI)

The element coding is:

Table 11.41: TLLI IE

11.3.36 Temporary Mobile Subscriber Identity (TMSI)

The element coding is:

Table 11.42: TMSI IE

11.3.37 Trace Reference

This element provides a trace reference number allocated by the triggering entity. The element coding is:

Table 11.43: Trace Reference IE

11.3.38 Trace Type

This element provides the type of trace information to be recorded. The element coding is:

Table 11.44: Trace Type IE

11.3.39 TransactionId

This element indicates a particular transaction within a trace. The element coding is:

Table 11.45: Transaction Id IE

11.3.40 Trigger Id

This element provides the identity of the entity which initiated the trace. The element coding is:

Table 11.46: Trigger Id IE

11.3.41 Number of octets affected

This information element indicates, for an MS, the number of octets transferred or deleted by BSS. The element coding is:

Table 11.47: Number of octets affected IE

The number of octets transferred or deleted by the BSS may be higher than the maximum Bmax value (6 553 500). SGSN shall handle any value higher than 6 553 500 as the value 6 553 500.

11.3.42 Packet Flow Identifier (PFI)

This information element indicates the Packet Flow Identifier for a BSS Packet Flow Context. The element coding is:

Table 11.48: Packet Flow Identifier (PFI) IE

The BSS shall not negotiate BSS PFCs for the following pre-defined PFI values: Best Effort, Signaling, and SMS.

PFIs have local significance to a mobile station. A BSS Packet Flow Context shall be uniquely identified by the PFI along with the IMSI or TLLI within a routeing area.

11.3.42a (void)

11.3.43 Aggregate BSS QoS Profile

This information element indicates the Aggregate BSS QoS Profile (ABQP) for a BSS Packet Flow Context. The ABQP is considered to be a single parameter with multiple data transfer attributes as defined in 3GPP TS 23.107.

The element coding is:

Table 11.49: Aggregate BSS QoS Profile IE

11.3.44 GPRS Timer

The purpose of the GPRS timer information element is to specify GPRS specific timer values, e.g. the Packet Flow timer.

Table 11.50: GPRS Timer IE

Timer value: Bits 5 to 1 represent the binary coded timer value.

Unit value: Bits 6 to 8 defines the timer value unit for the GPRS timer as follows:

Bits

8 7 6

0 0 0 value is incremented in multiples of 2 seconds

0 0 1 value is incremented in multiples of 1 minute

0 1 0 value is incremented in multiples of decihours

1 1 1 value indicates that the timer does not expire.

Other values shall be interpreted as multiples of 1 minute in this version of the protocol.

11.3.45 Feature Bitmap

The Feature bitmapinformation element indicates the optional features supported by the underlying NSE. The element coding is:

Table 11.51: Feature Bitmap IE

Table 11.52: "PFC bit" coding

Table 11.53: “CBL bit” coding

11.3.46 Bucket Full Ratio

This information element is used to convey the current bucket counter. It is binary encoded as follows: Bcurrent * (100 / Bmax). The element coding is:

Table 11.53: Bucket Full Ratio IE

The field ranges from zero (00000000) to two hundred and fifty five (11111111). A value of zero means that the bucket is empty. A value of hundred means that the bucket is exactly full, while a value of two hundred and fifty five means that the bucket is at least 2.55 times B_max

11.3.47 Service UTRAN CCO

The Service UTRAN CCO (Cell Change Order) information element indicates information for Network initiated Cell Change Order to UTRAN, relevant if the procedure is used:

Table 11.53: Service UTRAN CCO IE

Table 11.54: UTRAN CCO Value part coding