B

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[範例]
CTV(Chinese Translation Version)，中文譯稱。一段中文或英文的簡短說明:-:知識分類。====================================================
BCH(Broadcast Channels)，廣播通道。在GSM為BCCH，GPRS則為PBCCH，只有下行方向。:-:GSM/GPRS/logical channel名稱。

Bm CHannel(-)，Bm通道。
A Bm channel is a bi-directional or uni-directional user channel able to carry:
- a 13 kbit/s rate bit stream with an error structure and a transmission delay compatible with some grade ofservice, intended to carry voice encoded according to Technical Specifications in 3GPP TS 06-series; or
- a bit stream at a rate of 14,5 kbit/s, 12 kbit/s, 6 kbit/s or 3,6 kbit/s, with an error structure and a transmissiondelay adapted to a wider range of services, including data transmission; or other kinds of bit stream adapted to awider range of services (for further study).

User information streams are carried on the Bm channel on a dedicated, alternate (within one call or as separate calls),or simultaneous basis, consistent with the Bm channel carrying capability.

The following are samples of userinformation streams:i) voice encoded at 13 kbit/s according to Technical Specifications in 3GPP TS 06-series; andii) data information corresponding to circuit switching user classes of services at bit rates compatible with thechannel capability.

A Bi-directional Bm Channel uses the radio resources referred to as TCH/F. Bi-directional downlink Bm Channel usesthe radio resources referred to as TCH/FD. The Uni-directional Bm Channel is only defined in downlink direction.Traffic channels (TCH) are fixed physical gross rate channels, accompanied with timing (see 3GPP TS 05.02). :-:GSM用戶通道的代稱，類比於ISDN中的B-Channel.

Ref:
[-] ETSI TS 100 552 V8.0.2 (2002-05) Digital cellular telecommunications system (Phase 2+);Mobile Station - Base Station System (MS - BSS) Interface Channel Structures and Access Capabilities(3GPP TS 04.03 version 8.0.2 Release 1999)

BMC(Broadcast/Multicast Control)，廣播/群播控制層。是WCDMA特有的功能，屬於OSI第二層，在RLC上端，為處理基地台廣播訊息的通訊協定，針對來自基地台的廣播訊息進行手機端的儲存、顯示等處理。:-:WCDMA無線通信協定第二層。
Ref:
[-] 3GPP TS 25.324，Broadcast/Multicast Control BMC.
[-] NTP: WCDMA L2/L3通信協定及軟體發展，2004年10月62期。

BS(Base Station)，基地台。WiMAX基地台的英文簡寫。:-:WiMAX網路元件。

BSSAP(Base Station System Application Part)，基地台應用層。The protocol employed across the A and E interfaces in the GSM system. It is used to transport MM and CM information to and from the MSC.:-:GSM核心網路應用層堆疊。

說明：BSSAP = BSSMAP + DTAP
The BSS Application Part is split into two sub application parts, these are:- the BSS Management Application Part (BSSMAP); the Direct Transfer Application Part (DTAP).

3GPP spec:
原始規格是在A界面：
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)
應用在E界面：
1997-04: Digital cellular telecommunications system (Phase 2+) (GSM);Application of the Base Station System Application Part (BSSAP) on the E-interface (GSM 09.08)
2005-06: Digital cellular telecommunications system (Phase 2+); Application of the Base Station System Application Part (BSSAP) on the E-Interface (3GPP TS 49.008 version 6.1.0 Release 6)

Ref:
[-] mpirical

BSSAP+(Base Station System Application Part +)，基地台應用層加強版。此堆疊位於Gs界面的應用層，用來執行Gs界面的重要功能，如IMSI-attached, GPRS-attached, Paging以及Location Update等程序。:-:GPRS網路Gs界面上的堆疊名稱。
Ref:
[-] ETSI TS 101 346 V7.5.0 (2001-12)Technical SpecificationDigital cellular telecommunications system (Phase 2+);General Packet Radio Service (GPRS);Serving GPRS Support Node (SGSN) -Visitors Location Register (VLR);Gs interface layer 3 specification(3GPP TS 09.18 version 7.5.0 Release 1998)

BSSAP-LE(BSSAP LCS Extension)，基地台應用層-定位服務擴充。

3GPP spec:
2000-05: Digital cellular telecommunications system (Phase 2+) (GSM);Location Services (LCS);Base Station System Application Part LCS Extension (BSSAP-LE) (GSM 09.31 version 8.1.0 Release 1999)
2005-07: Digital cellular telecommunications system (Phase 2+);Location Services (LCS);Base Station System Application Part LCS Extension (BSSAP-LE) (3GPP TS 49.031 version 6.5.0 Release 6)

BSSMAP(Base Station Subsystem Management Application Part)，基地台子系統管理應用部。
This protocol is also used to convey general BSS control information between the MSC and the BSS. An example is the allocation of traffic channels between the MSC and the BSS.

The BSSMAP supports all of the procedures between the MSC and the BSS that require interpretation and processingof information related to single calls, and resource management.

Some of the BSSMAP procedures result in, or are triggered by, Radio Resource (RR) management messages defined in3GPP TS 24.008. The BSSMAP procedures are described in sub-clause 3.:-:GSM網路應用層堆疊。

Ref:
[-] mpirical
[-] 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)

BTS(Base Transceiver System)，基地台。GSM, GPRS, IS-95與cdma2000基地台的英文簡寫。 Current Serving BTS:
BTS on one of whose channels (TCH, DCCH, CCCH or PDCH) the MS is currently operating.
:-:移動通信系統基地台的通稱與簡寫。

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