CN101163286A - Method of implementing voice coding/decoding capability interaction between wireless network and core network - Google Patents

Method of implementing voice coding/decoding capability interaction between wireless network and core network Download PDF

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Publication number
CN101163286A
CN101163286A CNA2007101655570A CN200710165557A CN101163286A CN 101163286 A CN101163286 A CN 101163286A CN A2007101655570 A CNA2007101655570 A CN A2007101655570A CN 200710165557 A CN200710165557 A CN 200710165557A CN 101163286 A CN101163286 A CN 101163286A
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base station
sub
voice coding
decoding
interface
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CNA2007101655570A
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CN101163286B (en
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王欣晖
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ZTE Corp
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ZTE Corp
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Priority to CN2007101655570A priority Critical patent/CN101163286B/en
Priority to PCT/CN2007/003939 priority patent/WO2009059477A1/en
Priority to CN2007801011336A priority patent/CN101828423B/en
Publication of CN101163286A publication Critical patent/CN101163286A/en
Priority to HK10107495.3A priority patent/HK1141187A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/22—Mode decision, i.e. based on audio signal content versus external parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/14—Interfaces between hierarchically different network devices between access point controllers and backbone network device

Abstract

The present invention relates to a method of realizing the interaction of voice coding and decoding capacity between a wireless network and a core network. The present invention includes that a MSC Server (10) sends the expanded request information of BSSAP resource to BSC (20) and requires the BSC (20) to report the voice coding capacity of all plots under management; the BSC (20) reports the voice coding capacity of all plots to the MSC Server (10) through a plurality of expanded resource indication information. The method is used to ensure that MSC Server (10) can know the voice coding capacity of all plots on the wireless network, which avoids that the wireless network allocated by the core network can not provide the voice version, which furthermore reduces the times of voice coding and decoding, is easy for the conversion operation of non-voice coding and decoding to be achieved and improves the voice quality.

Description

The implementation method of voice coding/decoding capability interaction between a kind of wireless network and core net
Technical field
The present invention relates to mobile communcations system, be specifically related to the implementation method of voice coding/decoding capability interaction between a kind of wireless network and core net.
Background technology
At existing global system for mobile communications Global System for Mobile Communications, be called for short among the GSM, the Mobile Switching Center of mobile switching centre, be called for short MSC and base station controller Base Station Controller, the A interface that is called for short between the BSC is based on time division multiplexing Time Division Multiple, abbreviation TDM carrying, that transmission is the pulse code modulation Pulse Code Modulation of 64Kbps thereon, is called for short the PCM coded voice signal.Portable terminal MobileStation is called for short MS and base station Base Station, and what transmit on the air interface Um Interface between abbreviation BTS is the compressed voice code signal.Interface between BTS and BSC is an Abis interface, also is based on TDM carrying, and what transmit on this interface is the compressed voice code signal identical with Um Interface.BSC then has code conversion and rate adaptation function Transcode Rate Adaption Unit, be called for short TRAU, finish the conversion of the coding of compressed voice in the Abis interface and the PCM speech coding of A interface 64Kbps, realize that the unit of this function then is called codec unit Transcoder, be called for short TC.
Development along with the third generation mobile system, behind 3GPP release 4, core network element has realized that control separates with carrying, two new network elements have been formed: Mobile Switching Center Server MobileSwitching Center Server, be called for short MSC Server and media gateway Media Gateway, be called for short MGW, the interface between MSC Server and the MGW is a Mc interface, and MSC Server finishes control to MGW by Mc interface.Simultaneously, along with the introducing of IP technology in wireless network, the A interface progressively adopts the carrying based on IP, and promptly A Interface Over IP is called for short AoIP.Therefore traditional GSM network architecture also changes, because MGW itself has code conversion and rate adaptation function, therefore just can cancel the TRAU function among the BSC, promptly cancel the TC among the BSC, also transmit the compressed voice encoding and decoding signal identical at the A interface, utilize the code conversion of MGW and rate adaptation function to carry out encoding and decoding speech with Abis interface.This framework has significantly reduced the requirement to A interface transfer resource, help operator and reduce running cost, can reduce simultaneously the number of times of encoding and decoding speech in the existing GSM network, and then raising voice quality, realize no encoding and decoding speech conversion operations Transcoder FreeOperation, be called for short Trfo.But this framework also brings a problem, because BSC has cancelled TC, what utilize in the communication process is the TC function of MGW, therefore just needing a kind of method can make between core net and the wireless network in the advance negotiation of lang sound codec functions of call setup, with the Speech version of avoiding core net assignment wireless network not provide as far as possible.Otherwise, when the core net assignment wireless network can not provide Speech version the time, MGW is when handle calling out, having to insert TC, to carry out voice adaptive, so both wasted the TC resource, can not set up Trfo again in calling.
Summary of the invention
The technical issues that need to address of the present invention provide the implementation method of voice coding/decoding capability interaction between a kind of wireless network and core net, can make MSC Server know the voice coding/decoding capability of each sub-district of wireless network, thereby reduce the generation of the Speech version situation that core net assignment wireless network can not provide.
Above-mentioned technical problem of the present invention solves like this, and the implementation method of voice coding/decoding capability interaction between a kind of wireless network and core net is provided, and may further comprise the steps:
1.1) before call setup, Mobile Switching Center Server sends the resource request message that process is expanded by the A interface to base station controller, requires base station controller to report the voice coding/decoding capability of all sub-districts of its management;
1.2) base station controller adopts many through the resource indicator message of expansion the voice coding/decoding capability of all sub-districts of its management to be reported to Mobile Switching Center Server by the A interface.
According to implementation method provided by the invention, described wireless network comprises portable terminal, base station, base station controller, media gateway and the Mobile Switching Center Server that is connected successively with the mobile communication system that described core net constitutes, and A interface between the Abis interface between the Um Interface between described portable terminal and the described base station, described base station and the described base station controller, described base station controller and described Mobile Switching Center Server, the described media gateway and the Mc interface between described Mobile Switching Center Server and the described media gateway.
According to implementation method provided by the invention, described base station controller has been cancelled code conversion and rate adaptation function, uses the cell encoder in the described media gateway to finish the voice rate adaption function behind the call setup.
According to implementation method provided by the invention, described A interface can be based on IP carrying.
According to implementation method provided by the invention, described step 1.1) resource request message through expansion in is meant extended base station subsystem application part Base Station System Application Part, be called for short the spare fields Spare of the cell identifier cell Cell Identifier in the BSSAP existing resources request RESOURCE REQUEST message body, this spare fields value is set to 1 expression and requires base station controller to report the voice coding/decoding capability of all sub-districts of its management.
According to implementation method provided by the invention, described step 1.2) is meant through the resource indicator message of expansion in and in BSSAP existing resources indication RESOURCE INDICATION message body, increases the preferred encoding and decoding tabulation of base station sub-system cell BSS Preferred Codec List.
According to implementation method provided by the invention, the preferred encoding and decoding tabulation of described base station sub-system cell comprises the preferred encoding and decoding indication field in a plurality of sub-districts that resource request message total number field, current resource request message sequence number field, current resource request message length field and quantity can set in advance.
According to implementation method provided by the invention, described step 1.1) and step 1.2) between also comprise the voice coding/decoding capability of all sub-districts of its management of inquiry behind the resource request message that base station controller receives that Mobile Switching Center Server sends.
According to implementation method provided by the invention, described step 1.2) comprises that also Mobile Switching Center Server will do analysis relatively and take out public encoding and decoding speech type from the voice coding/decoding capability of a certain sub-district that base station controller the is received control signaling and the voice coding/decoding capability of media gateway by Mc interface.
The implementation method of voice coding/decoding capability interaction between a kind of wireless network provided by the invention and core net, by the expansion original resource request Resource Request of BSSAP and two message of resource indication ResourceIndication, make BSC can notify the voice coding/decoding capability of all wireless areas of its management of MSC Server with mode, frequency and scope that MSC Server requires; Further, MSCServer does the voice coding/decoding capability of the wireless area received control signaling and the voice coding/decoding capability of MGW by Mc interface to analyze relatively, take out public encoding and decoding speech type by decision algorithm, avoid the generation of the Speech version situation that core net assignment wireless network can not provide.Further reduce the encoding and decoding speech number of times and help realizing Trfo, improve voice quality.This method do not require and changes existing Um Interface and Abis interface, to the portable terminal of existing network and base station without any influence.
Description of drawings
Further the present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the present invention's AoIP situation lower network structural representation in the GSM communication system.
Fig. 2 is the schematic flow sheet of voice coding/decoding capability interaction implementation method between wireless network of the present invention and core net.
Fig. 3 is the resource request message schematic diagram that the present invention expands.
Fig. 4 is a cell identifier cell schematic diagram in the resource request message expanded of the present invention.
Fig. 5 is the resource indicator message schematic diagram that the present invention expands.
Fig. 6 is the preferred encoding and decoding table of a base station sub-system cell schematic diagram in the resource indicator message expanded of the present invention.
Embodiment
In gsm communication system, at the A interface as shown in Figure 1, comprising: the Mc interface between the A interface between the Abis interface between the Um Interface between portable terminal 60, base station 50, base station controller 20, media gateway 30, Mobile Switching Center Server 10 and portable terminal 60 and the base station 50, base station 50 and the base station controller 20, base station controller 20 and media gateway 30, the Mobile Switching Center Server 10, Mobile Switching Center Server 10 and the media gateway 30 based on the situation lower network structure of IP carrying.TC 40 cancels from BSC 20, uses the TC 40 among the MGW 30 to finish the voice rate adaption function behind the call setup.
As shown in Figure 2, the present invention has reused two BSSAP message in the existing protocol, be resource request message RESOURCE REQUEST and resource indicator message RESOURCE INDICATION, make base station sub-system Base Station System by expanding field relevant in these two message, be called for short the voice coding/decoding capability that BSS can report all sub-districts, specific implementation may further comprise the steps:
101) MSC Server 10 initiates request, sends resource request message RESOURCE REQUEST to BSC 20 by the A interface, requires it to report the voice coding/decoding capability of all sub-districts.Cell identifier cell Cell Identifier in the resource request message as shown in Figure 3, the original implication of this cell is the descriptor of a sub-district of definition, expand according to method of the present invention now, Cell Identifier cell structure after the expansion as shown in Figure 4, the present invention utilizes the spare fields Spare in the Cell Identifier cell, determine whether to require base station controller (20) to report the voice coding/decoding capability of all sub-districts of its management by the value of setting this spare fields, value as this Spare field is 1, represents that then MSC Server requires BSC to report the voice coding/decoding capability of all sub-districts under this BSC.
102) after BSC 20 receives the RESOURCEREQUEST message that MSC Server 10 sends by the A interface, the voice coding/decoding capability of all sub-districts of BSC 20 its management of inquiry, return to MSC Server 10 by RESOURCE INDICATION message then, this message can only once report the voice coding/decoding capability of a sub-district originally, expand according to method of the present invention now, RESOURCE INDICATION message structure after the expansion as shown in Figure 5, compare with original message, the present invention has increased the preferred encoding and decoding table of base station sub-system cell BSS Preferred Codec List, comprises the coding/decoding capability of a plurality of sub-districts in this cell.
Consider that the sub-district that a BSC 20 is managed has a lot, if in a RESOURCEINDICATION message, the information of all these sub-districts is all reported MSC Server 10, can cause message body length excessive, so the present invention has adopted the mode of many RESOURCE INDICATION to report the voice coding/decoding capability of all sub-districts of these BSC 20 management.The preferred encoding and decoding table of the base station sub-system cell BSS Preferred Codec List structure of expansion as shown in Figure 6, in the RESOURCE INDICATION message that each reports, Total Number of Segment field is represented the bar number of all RESOURCE INDICATION message, Num of Segment field is represented the sequence number of current RESOURCE INDICATION message in all RESOURCE INDICATION message, the Length field is represented the length of current RESOURCE INDICATION message, the coding/decoding information that comprises m sub-district in every RESOURCE INDICATION message at most, m can be provided with as parameter, such as being arranged to 32 etc.

Claims (10)

1. the implementation method of voice coding/decoding capability interaction between wireless network and core net is characterized in that, may further comprise the steps:
1.1) before call setup, Mobile Switching Center Server (10) sends the resource request message that process is expanded by the A interface to base station controller (20), requires base station controller (20) to report the voice coding/decoding capability of all sub-districts of its management;
1.2) base station controller (20) adopts many through the resource indicator message of expansion the voice coding/decoding capability of all sub-districts of its management to be reported to Mobile Switching Center Server (10) by the A interface.
2. according to the described implementation method of claim 1, it is characterized in that, described wireless network comprises the portable terminal (60) that is connected successively with the mobile communication system that described core net constitutes, base station (50), base station controller (20), media gateway (30) and Mobile Switching Center Server (10), and the Um Interface between described portable terminal (60) and described base station (50), Abis interface between described base station (50) and the described base station controller (20), described base station controller (20) and described Mobile Switching Center Server (10), Mc interface between A interface between the described media gateway (30) and described Mobile Switching Center Server (10) and the described media gateway (30).
3. according to claim 1 or 2 described implementation methods, it is characterized in that, described base station controller (20) has been cancelled code conversion and rate adaptation function, uses the cell encoder (40) in the described media gateway (30) to finish the voice rate adaption function behind the call setup.
4. according to claim 1 or 2 described implementation methods, it is characterized in that described A interface can be based on IP carrying.
5. according to the described implementation method of claim 1, it is characterized in that, described step 1.1) be meant the spare fields of the cell identifier cell in the extended base station subsystem application part existing resources request message body in through the resource request message of expansion, the value of setting this spare fields determines whether to require base station controller (20) to report the voice coding/decoding capability of all sub-districts of its management.
6. according to the described implementation method of claim 5, it is characterized in that described this spare fields value is set to 1 expression and requires base station controller (20) to report the voice coding/decoding capability of all sub-districts of its management.
7. according to the described implementation method of claim 1, it is characterized in that, described step 1.2) resource indicator message through expansion in is meant the preferred encoding and decoding tabulation of increase base station sub-system cell in Base Station Subsystem Application Part existing resources Indication message body, comprises the coding/decoding capability of a plurality of sub-districts in the preferred encoding and decoding tabulation of this base station sub-system cell.
8. according to the described implementation method of claim 7, it is characterized in that the preferred encoding and decoding tabulation of described base station sub-system cell comprises the preferred encoding and decoding indication field in a plurality of sub-districts that resource request message total number field, current resource request message sequence number field, current resource request message length field and quantity can set in advance.
9. according to the described implementation method of claim 1, it is characterized in that described step 1.1) and step 1.2) between also comprise the voice coding/decoding capability of all sub-districts of its management of inquiry behind the resource request message that base station controller (20) receives that Mobile Switching Center Server (10) sends.
10. according to the described implementation method of claim 1, it is characterized in that described step 1.2) voice coding/decoding capability that also comprises a certain sub-district that Mobile Switching Center Server (10) will be received from base station controller (20) the control signaling and the voice coding/decoding capability of media gateway (30) by Mc interface do analysis relatively and take out public encoding and decoding speech type.
CN2007101655570A 2007-11-08 2007-11-08 Method of implementing voice coding/decoding capability interaction between wireless network and core network Expired - Fee Related CN101163286B (en)

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CN2007101655570A CN101163286B (en) 2007-11-08 2007-11-08 Method of implementing voice coding/decoding capability interaction between wireless network and core network
PCT/CN2007/003939 WO2009059477A1 (en) 2007-11-08 2007-12-29 A method for realizing voice coding/decoding capability interaction between a radio network and a core network
CN2007801011336A CN101828423B (en) 2007-11-08 2007-12-29 A method for realizing voice coding/decoding capability interaction between a radio network and a core network
HK10107495.3A HK1141187A1 (en) 2007-11-08 2010-08-05 A method for realizing voice coding/decoding capability interaction between a radio network and a core network

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WO2009155739A1 (en) * 2008-06-23 2009-12-30 中兴通讯股份有限公司 Method for establishing a interface user plane calling based on ip bearing
GB2461684A (en) * 2008-06-27 2010-01-13 Vodafone Plc Transmitting communication mode information between network elements
WO2010145603A1 (en) * 2009-06-30 2010-12-23 中兴通讯股份有限公司 Method and system for reporting local internet protocol (ip) network access capability of home base station
CN101635994B (en) * 2008-07-25 2013-03-20 中兴通讯股份有限公司 Method for acquiring speech coding capacity of wireless network and realizing TrFO by core network

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CN101631368A (en) * 2009-08-19 2010-01-20 中兴通讯股份有限公司 Cell switching method, cell switching device and cell switching system based on GSM system
CN105744488B (en) * 2014-12-10 2021-06-04 中兴通讯股份有限公司 Method and system for establishing cluster service
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EP2043375B1 (en) * 1999-05-17 2011-10-26 Telefonaktiebolaget LM Ericsson (publ) Capability negotiation in a telecommunications network
DE102004019987B4 (en) * 2004-04-23 2006-07-27 Siemens Ag Construction of a transcoder-free-operation connection
CN101001403B (en) * 2006-01-10 2010-11-24 Ut斯达康通讯有限公司 Expansing codeless conversion operation in system of personal mobile phone

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Publication number Priority date Publication date Assignee Title
WO2009155739A1 (en) * 2008-06-23 2009-12-30 中兴通讯股份有限公司 Method for establishing a interface user plane calling based on ip bearing
GB2461684A (en) * 2008-06-27 2010-01-13 Vodafone Plc Transmitting communication mode information between network elements
US20100027470A1 (en) * 2008-06-27 2010-02-04 Vodafone Group Plc Communication network elements and communication methods therebetween
CN101635994B (en) * 2008-07-25 2013-03-20 中兴通讯股份有限公司 Method for acquiring speech coding capacity of wireless network and realizing TrFO by core network
WO2010145603A1 (en) * 2009-06-30 2010-12-23 中兴通讯股份有限公司 Method and system for reporting local internet protocol (ip) network access capability of home base station
CN101938736A (en) * 2009-06-30 2011-01-05 中兴通讯股份有限公司 Report method and system for local internet protocol network access capability of home base station

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CN101828423A (en) 2010-09-08
HK1141187A1 (en) 2010-10-29
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CN101163286B (en) 2011-11-30
CN101828423B (en) 2012-11-14

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