3 Definitions, symbols and abbreviations
3GPP48.016Base Station System (BSS) - Serving GPRS Support Node (SGSN) interfaceGeneral Packet Radio Service (GPRS)Network serviceRelease 17TS
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TS 22.060 and the following in apply:
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
IP endpoint: an endpoint defined by its IP address and UDP port. An IP endpoint can be a data endpoint and/or a signalling endpoint
Data IP endpoint: an IP endpoint used for Data traffic
Signalling IP endpoint: an IP endpoint used for Signalling traffic
Data traffic: data traffic for an IP Sub-Network is defined as NS SDUs for PTP and PTM functional entities (BVCI1)
Signalling traffic: signalling traffic for an IP Sub-Network is defined as NS SDUs for Signalling functional entities (BVCI=0) and all PDUs for IP Sub-Network Service Control
Full Mesh Connectivity: any IPv4 endpoint in an NSE is capable of communications with any IPv4 endpoint in its peer NSE. Also any IPv6 endpoint in an NSE is capable of communications with any IPv6 endpoint in its peer NSE
Network Service Entity Identifier (NSEI): identifier of an NS Entity having end-to-end significance across the Gb interface, i.e. the peer NSEs on the BSS side and the SGSN side are identified by the same NSEI value
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 the present document
Pool area: an area within which an MS may roam without need to change the serving SGSN. A pool area is served by one or more SGSNs in parallel. All the cells controlled by a BSC belong to the same one (or more) pool area(s).
3.2 Symbols
For the purposes of the present document, the symbols given in 3GPP TS 23.060 apply.
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in 3GPP TS 21.905 and the following apply:
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
IP Internet Protocol
IPv4 Internet Protocol version 4
IPv6 Internet Protocol version 6
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
PTM Point-To-Multipoint
PTP Point-To-Point
PVC Permanent Virtual Connection
RLC Radio Link Control
SGSN Serving GPRS Support Node
SNS Sub-Network Service
UDP User Datagram Protocol
UNI User-to-Network Interface