Radio Bearer Services

Radio Bearer Services Feature Parameter Description

Copyright Huawei Technologies Co., Ltd. 2010. All rights reserved.

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BSS Radio Bearer Services Contents

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Contents 1 Introduction ................................................................................................................................1-1

1.1 Scope ............................................................................................................................................ 1-1 1.2 Intended Audience ........................................................................................................................ 1-1 1.3 Change History.............................................................................................................................. 1-1

2 Overview of Radio Bearer Services .....................................................................................2-1

3 Telephone Service (TS11) .......................................................................................................3-1 3.1 Overview ....................................................................................................................................... 3-1 3.2 Telephone Service......................................................................................................................... 3-1

4 Emergency Call Service (TS12).............................................................................................4-1 4.1 Overview ....................................................................................................................................... 4-1 4.2 Emergency Call ............................................................................................................................. 4-1 4.3 Guaranteed Emergency Call......................................................................................................... 4-1

5 Point To Point Short Message Service (TS21, TS22) ......................................................5-1 5.1 Overview ....................................................................................................................................... 5-1 5.2 Point To Point Short Message Service.......................................................................................... 5-1

6 G3 Fax (TS61, TS62).................................................................................................................6-1 6.1 Overview ....................................................................................................................................... 6-1 6.2 G3 Fax........................................................................................................................................... 6-1

7 Bearer Service (CSD) ...............................................................................................................7-1 7.1 Overview ....................................................................................................................................... 7-1 7.2 Service Description ....................................................................................................................... 7-1

8 Parameters .................................................................................................................................8-1

9 Counters......................................................................................................................................9-1

10 Glossary ..................................................................................................................................10-1

11 Reference Documents .........................................................................................................11-1

BSS Radio Bearer Services 1 Introduction


1-1

1 Introduction 1.1 Scope This document describes the functions and principles of Huawei Global System for Mobile communications (GSM) Base Station Subsystem (BSS) radio bearer services, which includes telephone service (TS11), emergency call service (TS12), point to point short message service (TS21, TS22), G3 fax (TS61, TS62), and bearer service (CSD).

1.2 Intended Audience This document is intended for:

z Personnel who need to understand radio bearer services z Personnel who work with Huawei products

1.3 Change History This section provides information on the changes in different document versions.

There are two types of changes, which are defined as follows:

z Feature change: refers to the change in the radio bearer services feature of a specific product version. z Editorial change: refers to the change in wording or the addition of the information that was not

described in the earlier version.

Document Issues The document issues are as follows:

z 01 (2010-01-12)

01 (2010-01-12) This is the initial issue of GBSS9.0.

BSS Radio Bearer Services 2 Overview of Radio Bearer Services


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2 Overview of Radio Bearer Services GSM is a multi-service system, which provides multiple types of communication services for subscribers based on their requirements. Generally, GSM services are classified into speech services and data services. Speech services transmit voices, and data services transmit data information such as pictures, faxes, and files. In addition to these traditional services, GSM also provides new services such as the short message service.

Huawei GSM BSS provides mainly the following basic radio services:

z Telephone Service (TS11) z Emergency Call Service (TS12) z Point To Point Short Message Service (TS21, TS22) z G3 Fax (TS61, TS62) z Bearer Service (CSD)

The GSM radio services described in this document do not cover supplementary services and intelligent network services.

BSS Radio Bearer Services 3 Telephone Service (TS11)


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3 Telephone Service (TS11) 3.1 Overview Telephone service is a basic speech service specified in GSM specifications. It is also one of the basic speech service functions provided by operators. The excellent speech service provided by Huawei BSS provides the following benefits:

z Better user experience z Improved brand image, sustainable growth of operation gains, and everlasting competitive strength

3.2 Telephone Service Telephone service (TS11) is a basic function of the GSM equipment. It is also a basic service provided by Huawei GSM BSS.

The telephone service is classified into mobile-originated calls (MOC) and mobile-terminated calls (MTC).The speech calls can be made not only between MSs within a GSM Public Land Mobile Network (PLMN), but also between a PLMN MS and a subscriber of Public Switched Telephone Network (PSTN) or other communication networks.

In the BSS, the transcoder & rate adaptation unit (TRAU) is responsible for the speech conversion between the GSM speech codings and the 64 kbit/s pulse code modulation (PCM) coding. If the speech coding schemes specified in optional features are not activated for a common call, the full rate speech coding is adopted by default.

The coding scheme is selected according to the value of Speech Version before setting up a voice call.

BSS Radio Bearer Services 4 Emergency Call Service (TS12)


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4 Emergency Call Service (TS12) 4.1 Overview Huawei GSM BSS supports the emergency call service (TS12) specified in GSM specifications and provides higher priority for the emergency call service.

The emergency call service is of great importance to subscribers in emergencies. As defined in 3GPP, the emergency call services are statutory and mandatory in most networks. An emergency call takes precedence over a common call. A priority mechanism is implemented to provide fast and reliable access of emergency calls even when the network is in heavy load.

z During an emergency, the subscriber can dial the specified emergency service number free of charge for assistance even if the MS is out of service or the telephone charge is overdue.

z The emergency call service takes precedence over other services in accessing the network. Even located in congested cells, the subscriber can contact the aid agencies by dialing the emergency service number.

4.2 Emergency Call The Emergent Call Disable parameter specifies whether to enable the emergency call service.

The emergency call takes precedence over common calls. Compared with common calls, the procedure of the emergency call is simplified to accelerate the call establishment and to ensure a higher call establishment success rate. For example, during the immediate assignment procedure, a TCH/F can be assigned directly so that an emergency call can be quickly and easily allocated with radio resources.

Different from the procedure of the common MOC, the Emergency Setup message is used in the emergency call to substitute the Setup message.

4.3 Guaranteed Emergency Call In some special situations such as in an earthquake, tsunami, or flood, the network may be congested. Therefore, the emergency call services may not be guaranteed owning to insufficient resources.

The emergency call guarantee feature is the enhancement of the emergency call feature. With the emergency call guarantee feature, the setup success rate of emergency calls is improved to the greatest extent. Thus, provision of communications is ensured in disaster relief activities.

The following mechanisms are implemented to provide the emergency call guarantee feature:

z Preferentially assigning TCH/F to emergency calls in the immediate assignment phase z Resource Reservation and Preemption

For details, see the Guaranteed Emergency Call.

BSS Radio Bearer Services

5 Point To Point Short Message Service (TS21, TS22)


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5 Point To Point Short Message Service (TS21, TS22) 5.1 Overview The point-to-point short message service is more and more widely used in daily life and work. As a value-added service, the short message service complements the non-diversified mobile speech services of the GSM. This feature provides the following benefits:

z The point-to-point short message service meets the subscribers' increasingly diversified data service requirements.

z The point-to-point short message service has become an increasingly important source of operators' revenue and makes the operators' profit more diversified.

z The point-to-point short message service can be provided as the service provider (SP) service to enrich the operating of the operators.

The short message here refers to the one that is transmitted through SS7 signaling. The short message service implemented in the PS domain is not included. The PS short message is a function mainly implemented by the serving GPRS support node (SGSN). The PS short message is treated as a common data service on the BSC side.

5.2 Point To Point Short Message Service Mobile-terminated (MT) point-to-point short message service (TS11) and mobile-originated (MO) point-to-point short message service (TS12) specified in GSM specifications are basic functions of the GSM equipment. They are also basic services provided by Huawei GSM BSS.

The point-to-point short message service can be used to exchange information in plain text. With this service, the subscribers can exchange simple information with each other and the operators can send service promotion information and sale information. Both the short message service center (SMC) and the MS can initiate the point-to-point short message service. The BSS supports the sending and receiving of the short messages. On receiving the signaling of a short message from the MSC, the BSS forwards the short message to the MS. In turn, on receiving a short message from the MS, the BSS forwards the short message to the MSC.

The Short Message Downlink Disabled parameter specifies whether the DL short messages to a specific cell can be sent. This ensures that adequate radio resources are reserved for normal calls.

The Short Message Uplink Disabled parameter specifies whether the UL short messages from a specific cell can be sent. This ensures that adequate radio resources are reserved for normal calls.

BSS Radio Bearer Services 6 G3 Fax (TS61, TS62)


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6 G3 Fax (TS61, TS62) 6.1 Overview The G3 fax feature is a value-added mobile data service that allows MSs to send and receive the voice fax. The G3 fax feature complements the non-diversified mobile speech services of the GSM. This feature provides the following benefits:

z This feature enables the MS to receive and send fax any time any where and meets the diversified requirements of the subscribers.

z This feature enables operators to provide mobile fax service to extend the service range and the source of revenue.

6.2 G3 Fax TS61 refers to the G3 alternate voice and fax services and TS62 refers to the G3 automatic voice and fax services. TS61 and TS62 services specified in GSM specifications are basic functions of the GSM equipment. They are also basic services provided by Huawei GSM BSS.

With the TS61 and TS62 services, the MS can send and receive the voice fax in the format of switching coding information files.

The fax service is realized through other upper-layer protocols. Therefore, the BSS provides the lower-layer connection but does not process the upper-layer services. The main device required by this feature is deployed in the MSC.

The Data Service Allowed parameter specifies the supported data service. Set this parameter according to actual requirements.

BSS Radio Bearer Services 7 Bearer Service (CSD)


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7 Bearer Service (CSD) 7.1 Overview GSM supports the traditional circuit switched data (CSD) services and the data services of multiple rates.

Data services are more and more widely used in daily life and work. As a value-added mobile data service, the CSD service complements the non-diversified mobile speech services of the GSM. With the CSD service, the MS can connect to the operators' data network or even to the Internet.

This feature provides the following benefits:

z The CSD service meets the subscribers' increasingly diversified data service requirements. The CSD service also enables the subscribers to connect to external networks.

z The CSD service has become an increasingly important source of operators' revenue and makes the operators' profit more diversified.

z Operators can provide diversified services on the data platform of CSD to attract more subscribers, thereby achieving more profit.

z Unlike general packet radio service system (GPRS), CSD does not require the change of the existing BSS hardware. Instead, CSD can be implemented directly in the existing system without adding the packet control unit (PCU) device or hardware and software. This reduces the space required by the equipment room and facilitates the management of the equipment room. Moreover, the CSD increases the choices of data services.

7.2 Service Description Huawei GSM BSS supports various bearer services specified in GSM specifications. The GSM BSS provides the lower-layer connection but does not process the upper-layer services. The bearer service can be used in low-rate data service applications. Huawei GSM BSS supports the following bearer services:

z BS21 asynchronous duplex circuit data service, transparent/non-transparent, 300 bit/s z BS22 asynchronous duplex circuit data service, transparent/non-transparent, 1200 bit/s z BS23 asynchronous duplex circuit data service, transparent/non-transparent, 1200/75 bit/s z BS24 asynchronous duplex circuit data service, transparent/non-transparent, 2400 bit/s z BS25 asynchronous duplex circuit data service, transparent/non-transparent, 4800 bit/s z BS26 asynchronous duplex circuit data service, transparent/non-transparent, 9600 bit/s z BS31 synchronous duplex circuit data service, transparent/non-transparent, 1200 bit/s z BS32 synchronous duplex circuit data service, transparent/non-transparent, 2400 bit/s z BS33 synchronous duplex circuit data service, transparent/non-transparent, 4800 bit/s z BS34 synchronous duplex circuit data service, transparent/non-transparent, 9600 bit/s z BS41 PAD access service, asynchronous circuit, transparent/non-transparent, 300 bit/s z BS42 PAD access service, asynchronous circuit, transparent/non-transparent, 1200 bit/s z BS43 PAD access service, asynchronous circuit, transparent/non-transparent, 1200/75 bit/s z BS44 PAD access service, asynchronous circuit, transparent/non-transparent, 2400 bit/s z BS45 PAD access service, asynchronous circuit, transparent/non-transparent, 4800 bit/s z BS46 PAD access service, asynchronous circuit, transparent/non-transparent, 9600 bit/s z BS51 packet access service, 2.4 kbit/s, synchronous, UDI, non-transparent z BS52 packet access service, 4.8 kbit/s, synchronous, UDI, non-transparent

7 Bearer Service (CSD) BSS

Radio Bearer Services

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Issue 01 (2010-01-12)

z BS53 packet access service, 9.6 kbit/s, synchronous, UDI, non-transparent z BS61 alternate speech/data service, transparent/non-transparent z BS81 speech followed by data service

Bearer services BS23 and BS43 are applicable to the MOC only. In BS23 and BS43 services, the data rate of 75 bit/s is applicable to the uplink and the data rate of 1200 bit/s is applicable to the downlink.

BSS Radio Bearer Services 8 Parameters


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8 Parameters This chapter describes the parameters related to radio bearer services.

For the description of each parameter, see Table 8-1. For the default value, value ranges, and MML commands of each parameter, see Table 8-2.

Table 8-1 Parameter description (1)

Parameter Description

Data Service Allowed Data service supported by the BSC6900. You can set this parameter according to actual requirements.

Emergent Call Disable

Whether to disable emergency calls. For the MSs of access levels 0 to 9, if the value of this parameter is NO, emergency calls are enabled. For the MSs of access levels 11 to 15, emergency calls are disabled only when the relevant access control bit is set to 0 and this parameter is set to YES.

Short Message Downlink Disabled

Whether to prohibit sending point-to-point short messages. If necessary, this parameter is used for controlling whether to send downlink short messages from a specific cell so as to ensure sufficient radio channel resources for normal calls.

Short Message Uplink Disabled

This parameter specifies whether the transmission of point-to-point short messages is disabled. If necessary, the transmission of the uplink short messages in a specific cell can be disabled so that sufficient radio channels can be seized by normal calls.

Table 8-2 Parameter description (2)

Parameter Default Value

GUI Value Range

Actual Value Range

Unit MML Command Impact

Data Service Allowed

NT14_5K-0&NT12K-1&NT6K-1&T14_4K-0&T9_6K-1&T4_8K-1&T2_4K-1&T1_2K-0&T600_BITS-0&T1200_75-0

NT14_5K~0 NT12K~1 NT6K~2 T14_4K~3 T9_6K~4 T4_8K~5 T2_4K~6 T1_2K~7 T600_BITS~8 T1200_75

NT14_5K, NT12K, NT6K, T14_4K, T9_6K, T4_8K, T2_4K, T1_2K, T600_BITS, T1200_75

None SET GCELLOTHEXT

Cell

Emergent Call Disable

NO NO(No), YES(Yes)

NO, YES None SET GCELLCCBASIC

Cell

Short Message Downlink Disabled

NO NO(No), YES(Yes)

NO, YES None SET GCELLCCAD

Cell

8 Parameters BSS

Radio Bearer Services

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Short Message Uplink Disabled

NO NO(No), YES(Yes)

NO, YES None SET GCELLCCAD

Cell

BSS Radio Bearer Services 9 Counters


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9 Counters For the counters,see the BSC6900 GSM Performance Counter Reference.

BSS Radio Bearer Services 10 Glossary


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10 Glossary For the acronyms, abbreviations, terms, and definitions, see the Glossary.

BSS Radio Bearer Services 11 Reference Documents


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11 Reference Documents z 3GPP TS 24.008: Mobile radio interface Layer 3 specification; Core network protocols; Stage 3 z 3GPP TS 24.080: Mobile radio Layer 3 supplementary service specification; Formats and coding z 3GPP TS 44.018: Mobile radio interface layer 3 specification; Radio Resource Control (RRC)

protocol z 3GPP TS 48.008: Mobile Switching Centre - Base Station system (MSC-BSS) interface; Layer 3

specification z 3GPP TS 48.058: Base Station Controller - Base Transceiver Station (BSC-BTS) Interface; Layer 3

specification z BSC6900 Feature List z BSC6900 Basic Feature Description

1 Introduction 1.1 Scope 1.2 Intended Audience 1.3 Change History 2 Overview of Radio Bearer Services 3 Telephone Service (TS11) 3.1 Overview 3.2 Telephone Service

4 Emergency Call Service (TS12) 4.1 Overview 4.2 Emergency Call 4.3 Guaranteed Emergency Call

5 Point To Point Short Message Service (TS21, TS22) 5.1 Overview 5.2 Point To Point Short Message Service

6 G3 Fax (TS61, TS62) 6.1 Overview 6.2 G3 Fax

7 Bearer Service (CSD) 7.1 Overview 7.2 Service Description

8 Parameters 9 Counters 10 Glossary 11 Reference Documents

Radio Bearer Services

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