3 Definitions, symbols and abbreviations

08.163GPPBase Station System (BSS) - Serving GPRS Support Node (SGSN) interfaceGeneral Packet Radio Service (GPRS)Network serviceRelease 1999TS

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply. For additional applicable definitions refer to 3GPP TS 02.60 [18].

BSSGP Virtual Connection (BVC): end-to-end virtual communication path between remote Network Service user entities.

BSSGP Virtual Connection Identifier (BVCI): identifier of a BVC, having end-to-end significance across the Gb interface.

Network Service Entity Identifier (NSEI): identifier of an NS Entity having end-to-end significance across the Gb interface.

Network Service Virtual Connection (NS-VC): end-to-end virtual communication path between Network Service peer entities.

Network Service Virtual Connection Identifier (NS-VCI): identifier of an NS-VC having end-to-end significance across the Gb interface.

Network Service Virtual Link (NS-VL): virtual communication path between the BSS or the SGSN and the intermediate network, or between the BSS and the SGSN in case of direct point-to-point configuration.

Network Service Virtual Link Identifier (NS-VLI): identifier of an NS-VL, having local significance at the BSS or SGSN.

Network Service Virtual Connection Group: groups all NS-VCs together which provide communication between the same peer NS entities. This grouping has local significance at the BSS or SGSN.

Blocked / unblocked: when an NS-VC can not be used for NS user traffic, it is blocked. When an NS-VC can be used for NS user traffic, it is unblocked.

Dead / alive: when an NS-VC is able to provide communication between remote NS entities, it is alive. When it is not able, it is dead. These states are supervised by means of a test procedure, as further described in this Technical Specification.

3.2 Symbols

Refer to 3GPP TS 03.60 [19].

3.3 Abbreviations

For the purposes of the present document, the following abbreviations apply. Additional applicable abbreviations can be found in 3GPP TS 01.04 [20]. When there is conflict between the present document and 3GPP TS 01.04 [21], the following list takes precedence.

BECN Backward Explicit Congestion Notification

BSSGP Base Station System GPRS Protocol

BVC BSSGP Virtual Connection

BVCI BSSGP Virtual Connection Identifier

CLLM Consolidated Link Layer Management

DE Discard Eligibility

FECN Forward Explicit Congestion Notification

FR Frame Relay

FRF Frame Relay Forum

LLC Logical Link Control

LSP Link Selector Parameter

MAC Medium Access Control

NS Network Service

NSEI Network Service Entity Identifier

NS-SAP Network Service Service Access Point

NS-VC Network Service Virtual Connection

NS-VCI Network Service Virtual Connection Identifier

NS-VL Network Service Virtual Link

NS-VLI Network Service Virtual Link Identifier

PDU Protocol Data Unit

PTP Point-To-Point

PTM Point-To-Multipoint

PVC Permanent Virtual Connection

RLC Radio Link Control

SGSN Serving GPRS Support Node

UNI User-to-Network Interface