08.163GPPBase Station System (BSS) - Serving GPRS Support Node (SGSN) interfaceGeneral Packet Radio Service (GPRS)Network serviceRelease 1999TS
For the purposes of the present document, the following terms and definitions apply. For additional applicable definitions refer to 3GPP TS 02.60 .
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.
Refer to 3GPP TS 03.60 .
For the purposes of the present document, the following abbreviations apply. Additional applicable abbreviations can be found in 3GPP TS 01.04 . When there is conflict between the present document and 3GPP TS 01.04 , 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
PVC Permanent Virtual Connection
RLC Radio Link Control
SGSN Serving GPRS Support Node
UNI User-to-Network Interface