BSSMAP message group

原始位置：GSM A-interface [BSC-MSC]
延伸應用：GSM E-interface [MSC-MSC]

[前言]
BSSMAP顧名思義是與BSS(BTS + BSC)相關的通信堆疊，所以出現在A-interface(BSS-MSC之間)是理所當然的，但是後來被使用在E-interface(MSC-MSC之間)，作為Inter-MSC Handover的程序應用，這點很容易讓工程師感到困惑，請讀者注意。

All the BSSMAP messages are listed in the following table.

ASSIGNMENT REQUEST
ASSIGNMENT COMPLETE
ASSIGNMENT FAILURE
CHANNEL MODIFY REQUEST
BLOCK
BLOCKING ACKNOWLEDGE
CIRCUIT GROUP BLOCK
CIRCUIT GROUP BLOCKING ACKNOWLEDGE
CIRCUIT GROUP UNBLOCK
CIRCUIT GROUP UNBLOCKING ACKNOWLEDGE
CLEAR COMMAND
CLEAR COMPLETE
CLEAR REQUEST
UNBLOCK
UNBLOCKING ACK
HANDOVER CANDIDATE ENQUIRE
HANDOVER CANDIDATE RESPONSE
HANDOVER REQUEST
HANDOVER REQUIRED
HANDOVER REQUIRED REJECT
HANDOVER REQUEST ACKNOWLEDGE
HANDOVER COMMAND
HANDOVER COMPLETE
HANDOVER SUCCEEDED
HANDOVER FAILURE
HANDOVER PERFORMED
HANDOVER DETECT
RESOURCE REQUEST
RESET
RESET ACK
RESOURCE INDICATION
PAGING
OVERLOAD
MSC INVOKE TRACE
BSS INVOKE TRACE
CLASSMARK UPDATE
CLASSMARK REQUEST
CIPHER MODE COMMAND
CIPHER MODE COMPLETE
CIPHER MODE REJECT
COMPLETE LAYER 3 INFORMATION
QUEUING INDICATION
SAPI "N" REJECT
RESET CIRCUIT
RESET CIRCUIT ACKNOWLEDGE
CONFUSION
UNEQUIPPED CIRCUIT
LOAD INDICATION
VGCS/VBS SETUP
VGCS/VBS SETUP ACK
VGCS/VBS SETUP REFUSE
VGCS/VBS ASSIGNMENT REQUEST
VGCS/VBS ASSIGNMENT RESULT
VGCS/VBS ASSIGNMENT FAILURE
VGCS/VBS QUEUING INDICATION
UPLINK REQUEST
UPLINK REQUEST ACKNOWLEDGE
UPLINK REQUEST CONFIRMATION
UPLINK RELEASE INDICATION
UPLINK REJECT COMMAND
UPLINK RELEASE COMMAND
UPLINK SEIZED COMMAND
SUSPEND
RESUME
CHANGE CIRCUIT
CHANGE CIRCUIT ACKNOWLEDGE
COMMON ID
LSA INFORMATION
CONNECTION ORIENTED INFORMATION
PERFORM LOCATION REQUEST
PERFORM LOCATION RESPONSE
PERFORM LOCATION ABORT
CONNECTIONLESS INFORMATION
(共73個，參考[1])

其中使用於E-interface的部分BSSMAP messages如下：

ASSIGNMENT REQUEST (MSC-A -> MSC-I)
Excluded information element: CIRCUIT IDENTITY CODE
ASSIGNMENT COMPLETE (MSC-I -> MSC-A)
Excluded information element: CIRCUIT POOL, CIRCUIT IDENTITY CODE
ASSIGNMENT FAILURE (MSC-I -> MSC-A)
Excluded information elements: CIRCUIT POOL, CIRCUIT POOL LIST
* HANDOVER REQUEST (MSC-A -> MSC-T and MSC-I -> MSC-A)
Excluded information element: CIRCUIT IDENTITY CODE
* HANDOVER REQUEST ACKNOWLEDGE (MSC-T -> MSC-A and MSC-A -> MSC-I)
Excluded information element: CIRCUIT POOL, CIRCUIT IDENTITY CODE
* HANDOVER COMPLETE (MSC-T -> MSC-A)
* HANDOVER FAILURE (MSC-T -> MSC-A and MSC-I -> MSC-A)
Excluded information elements: CIRCUIT POOL, CIRCUIT POOL LIST
HANDOVER PERFORMED (MSC-I -> MSC-A)
* HANDOVER DETECT (MSC-T -> MSC-A)
CLEAR REQUEST (MSC-I -> MSC-A)
SAPI "n" REJECT (MSC-I -> MSC-A)
CONFUSION (MSC-T -> MSC-A, MSC-A -> MSC-T,
MSC-I -> MSC-A and MSC-A -> MSC-I)
# MSC INVOKE TRACE (MSC-A -> MSC-I)
# BSS INVOKE TRACE (MSC-I -> MSC-A and MSC-A -> MSC-T)
CIPHER MODE COMMAND (MSC-A -> MSC-I)
CIPHER MODE COMPLETE (MSC-I -> MSC-A)
CIPHER MODE REJECT (MSC-I -> MSC-A)
** QUEUING INDICATION (MSC-T -> MSC-A, MSC-I -> MSC-A,
and MSC-A -> MSC-I)
CLASSMARK UPDATE (MSC-I -> MSC-A and MSC-A -> MSC-T)
CLASSMARK REQUEST (MSC-A -> MSC-I)
(參考[2])

Ref:
[1] ETSI TS 148 008 V6.11.0 (2005-09) Digital cellular telecommunications system (Phase 2+);Mobile Switching Centre - Base Station system (MSC-BSS) interface; Layer 3 specification(3GPP TS 48.008 version 6.11.0 Release 6)

[2] Digital cellular telecommunications system; Application of the Base Station SystemApplication Part (BSSAP) on the E-interface(GSM 09.08)

070613r1版本