CN100473203C - CDMA2000 access network service updating method based on packet - Google Patents
CDMA2000 access network service updating method based on packet Download PDFInfo
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- CN100473203C CN100473203C CNB2005101050013A CN200510105001A CN100473203C CN 100473203 C CN100473203 C CN 100473203C CN B2005101050013 A CNB2005101050013 A CN B2005101050013A CN 200510105001 A CN200510105001 A CN 200510105001A CN 100473203 C CN100473203 C CN 100473203C
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Abstract
The method comprises: after base-station receives the renew request borne by MSCe, it compares the bearing format in the message with the currently bearing format to judge the service alteration type; if the service alteration only alters SO, the base-station sends the message comprising new SO to MS, and according to the feedback message from MS, decides if MS supports new SO; if yes, then base station and MS use new service configuration, and informs MSCe that the service alteration is successful; if not, the base-station informs MSCe that the service alteration failures; if the service alteration either alters SO or alters RC, the base-station determines new service configuration parameters and builds channel resources according to new SO and RC, and sends the new configuration parameters to MS through switch indication; if the message fed back from MS is a switch completion message, then the base-station informs MSCe that service alteration is successful; if the message fed back from MS is a failure message, then the base-station informs the MSCe that service alteration failures.
Description
Technical field
The present invention relates to code division multiple access (CDMA, Code Division Multiple Access) mobile communication technology field, relate in particular to the method that a kind of packet-based CDMA2000 Access Network is realized business change.
Background technology
Service negotiation is exactly at the beginning of communication link is set up, travelling carriage (MS, Mobile Station) and base station (BS, the Base Station) process that configuration is held consultation and determined the communication link business configuration with final with regard to corresponding business.Service negotiation is directly connected to the business configuration parameter of communication link, and quality of service is had direct influence.
Service negotiation is that business configuration is held consultation, thereby is necessary to introduce the notion of business configuration.So-called business configuration (Service Configuration) is meant the set of base station and the optional link configuration of travelling carriage.Base station and travelling carriage adopt in the set the public attribute of a cover to construct and decompose traffic channel frame, finish the mutual of forward link and reverse link traffic channel frame.
In fact, service negotiation comprises two aspects, and promptly business option (SO, Service Option) is consulted and the business configuration attribute negotiation.For each business option of base station and travelling carriage support, available business configuration attribute is optional within the specific limits, but not unconfined.That is to say, when service negotiation, should at first determine the business option that desire is used, from the optional business configuration attribute of this business option, select suitable business configuration attribute to hold consultation again.
The business configuration attribute negotiation comprises radio configuration (RC, Radio Configuration), Multiplex Option (MO, Multiplex Option), the negotiation of coded system etc.Interrelated between them, thereby in a service attribute negotiations process, can hold consultation to the multiple business attribute simultaneously, to reduce Signalling exchange institute time-consuming.Wherein, RC is meant the mode of operation of a series of forward directions or reverse traffic channel, and every kind of RC supports a sets of data speed;
Traditional BS and the service negotiation process between the MS are specific as follows:
Travelling carriage can be asked a business configuration that is associated with business option, the also business configuration that can please look for novelty in the course of work of Traffic Channel when making a call.Business configuration of being asked and original business configuration can greatly differ from each other, also can be very nearly the same.
If the business configuration that travelling carriage is asked is acceptable for the base station, they just bring into use new business configuration so.Otherwise the base station can be refused this request or be proposed the business configuration of an alternative usefulness.
If the base station proposes to substitute the business configuration of usefulness, this business configuration can be accepted or refuse to travelling carriage as the case may be, perhaps reintroduce another business configuration request, to the last the business configuration that can accept is mutually found in travelling carriage and base station, perhaps any one party is refused the business configuration that the other side asked in travelling carriage and the base station, and the service negotiation process promptly finishes.
Similarly, a business configuration that is associated with business option, the also business configuration that can please look for novelty also can be asked in the base station in the course of work of Traffic Channel when mobile paging station.Its negotiations process as mentioned above, just the role with base station and travelling carriage exchanges.
Packet-based CDMA2000 Access Network can adopt Internet Protocol (IP, Internet Protocol) address switching technology to be linked into the CDMA2000 core net that realizes traditional mobile terminal territory (LMSD, Legacy MS Domain).Move switching subsystem (MSS with traditional circuit domain, Mobile Switching Subsystem) compares, the variation of CDMA2000 core net maximum is to call out separating of control and carrying, replace time division multiplexing (TDM with the Packet Based Network technology, Time Division Multiplexing) technology, traditional (MSC of mobile switching centre, Mobile Switching Center) network element is evolved into the simulator (MSCe of mobile switching centre, Mobile SwitchingCenter emulator) and media gateway (MGW, Media Gateway) two functional entitys, MSCe provides and calls out control and mobile management function, MGW provides media control function and transfer resource, and has the Media Stream operating function.
MGW need be under the control of MSCe, by the bearer negotiation process according to the relevant information that obtains and with base station system in selector unit (SDU, Selection and Distribution Unit) set up carrying and connect.The bearer negotiation process has been introduced two notions: exempt from a yard type conversion operations (TrFO, Transcoder Free Operation) and long-range sign indicating number type conversion operations (RTO, Remote Transcoder Operation), for these two functions, the 3GPP2 standard-required its as essential realization function.
The QualComm that cdma system current stage speech coding technology mainly contains 8Kbps and 13Kbps is excited linear predictive coding (QCELP, QualComm Code Excited Linear Predictive), enhanced variable rate sign indicating number (EVRC, Enhanced Variable Rate Code), development along with wireless technology and encoding and decoding technique, emerged selectable modes audio coding (SMV, Selectable-Mode Vocoder) encoding and decoding technique such as, the portable terminal that has different encoding and decoding techniques like this coexists as in the consolidated network, for portable terminal with identical encoding and decoding technique in cdma network during transferring voice, just can not carry out coding-decoding operation, like this, can improve voice quality and reduce transmission delay.
TrFO is meant between the traditional mobile terminal and transmits the voice messaging that compresses by removing codec from based on the bearer path of packet transmission networks.Vocoder (Transcoder) both can with wireless access network (RAN, RadioAccess Network) association, also can be related with MGW.By only transmitting compressed voice, unnecessary signal encoding and decode operation on bearer path, have been eliminated.Simultaneously, TrFO also can improve speech quality, and TrFO is not used in IP-based voice messaging (VoIP, Voice over IP), and TrFO only is a kind of ability that is had in the LMSD.TrFO has used the out-of-band signalling ability that comprises two end nodes negotiation code/decode types.If two end nodes can carry out same coding-decoding operation, so, just might use single preferred compressed voice to transmit on the net in whole group.TrFO a kind ofly exempts from yard mechanism of type transducer in core net a call arrangement, and the required Transcoder of this calling is arranged in MS.
RTO is a kind of mechanism of giving a call arrangement sign indicating number type transducer in core net as a kind of special case of TrFO.RTO does not also mean that cascade (Tandem) operation.Since when the coded system of communication two party cannot be reached an agreement, the necessity that will have vocoder to exist in the core net.For example, in order to support portable terminal-public fixed telephone network (MS-PSTN, Mobile Station-Public Switched Telephone Network) calling need be inserted sign indicating number type transducer in MGW or base station controller (BSC, Base Station Controller).For the calling of MS-MS, if the codec difference of two MS then needs a sign indicating number type transducer in the network.This is different from typical Tandem usage, and it is a kind of public rather than transmit by unique agreement to use 2 sign indicating number type transducers that the sign indicating number type of 2 end nodes is converted to.
For top said TrFO and RTO operation, hold consultation by out-of-band signalling, go up application layer signaling protocol (BSAP) signaling by A1p interface (interface of carrier signaling between BS and the MSCe) between Access Network and the core net and realize.The base station is necessary can revise Traffic Channel and/or service option as required after receiving the bearer update request message, promptly carries out business change.The same with professional negotiation, business change comprises two aspects, i.e. business option change and the change of business configuration attribute.
The 3rd generation global cooperation project 2 (3GPP2,3
RdGeneration Partnership Project 2) A.S0013-CVersion 1.0, the clear and definite process of business change in the related procedure of 3G-IOS v5.0 (IOS for CDMA2000 Access Network Interfaces) agreement, but this agreement flow process that procedure definition is not detailed for this reason and corresponding air protocol do not have corresponding realization flow yet.
Summary of the invention
The objective of the invention is to solve in the 3GPP2 agreement not the detailed realization flow of the business change existing problem and shortage of making definitions, provide a kind of packet-based CDMA2000 Access Network that can finish the business change process of stipulating in the 3GPP2 agreement simply, effectively to realize the method for business change.
For addressing the above problem, the present invention adopts following technical scheme: this packet-based CDMA2000 Access Network is realized the method for business change, described business change comprises that only changing business option does not change radio configuration and not only change business option but also change two types of radio configuration, the base station is after receiving the bearer update request message of mobile switching centre's simulator, the bear format of carrying in the message and the bear format of current calling are compared, and judge the business change type according to the corresponding relation between business option and radio configuration and the data rate that needs to support:
If described business change process is only changed business option and do not changed radio configuration, then comprise the steps:
(1) base station will include this business request information of calling out new business option of assigning and be sent to travelling carriage;
(2) base station judges according to the service response message of travelling carriage feedback whether travelling carriage supports the business option of described new appointment; If support, then the base station professional connection message that will include the new business configuration is sent to travelling carriage, the business of receiving the travelling carriage feedback connect finish message after, the base station is upgraded successfully by bearer update response message notice mobile switching centre simulator service bearer; If do not support, then failure is upgraded by bearer update response message notice mobile switching centre simulator service bearer in the base station;
If described business change process is not only changed business option but also change radio configuration, then comprise the steps:
(a) base station is determined new business configuration parameter and is set up corresponding channel resources according to this business option and radio configuration of calling out new appointment;
(b) base station is sent to travelling carriage by the switch indicating information that original forward traffic channel will include the new business configuration;
(c), then upgrade successfully by bearer update response message notice mobile switching centre simulator service bearer if it is handoff completion message that the base station receives the feedback message of travelling carriage; If it is switch failure information that the base station receives the feedback message of travelling carriage, then upgrade failure by bearer update response message notice mobile switching centre simulator service bearer.
By technique scheme of the present invention, the base station can be revised Traffic Channel and/or service option as required, and can effectively finish the business change process of stipulating in the 3GPP2 agreement, satisfy travelling carriage and finished service negotiation with the base station and be in business change demand under traffic channel state/talking state.
Description of drawings
Fig. 1 is that the CDMA2000 Access Network that the present invention is based on grouping realizes that base station in the method for business change compares the bear format of the bear format of carrying in the bearer update request message and current calling and judge the flow chart of business change type;
Fig. 2 is that the CDMA2000 Access Network that the present invention is based on grouping realizes that the business change process is only changed the flow chart that business option is not changed radio configuration in the method for business change;
Fig. 3 is that the CDMA2000 Access Network that the present invention is based on grouping realizes that business change process in the method for business change not only changed business option but also changed the flow chart of radio configuration;
Embodiment
Below in conjunction with embodiment, further specify technical characterictic of the present invention and function characteristics, purpose is that the present invention can be described better, but is not to be used for limiting protection scope of the present invention.
MSCe is in order to finish TrFO or RTO, can not use the base station to dispose the vocoder of oneself for its business option, use this business option to come to carry out service negotiation, i.e. business change with MS again but can carry a kind of business option requirement base station by Bearer Update Request.Above-mentioned business change can initiatively be initiated by mobile switching centre's simulator or base station; Similarly, business change also can initiatively be initiated by send bearer update instruction (Bearer Update Required) message to MSCe in the base station, receive the bearer update request message of MSCe in the base station after, business change need be finished in the base station, and the process of its business change is consistent with the business change process that MSCe initiates.
The CDMA2000 Access Network that the present invention is based on grouping is realized the method for business change, according to the content of business change and before business change BS and the consensus business option of MS, this business change comprises that only changing business option does not change radio configuration and not only change business option but also change two types of radio configuration;
Referring to Fig. 1, the base station is after receiving the bearer update request message of mobile switching centre's simulator, the bear format of carrying in the message and the bear format of current calling are compared, and, specifically comprise the steps: according to bear format, business option, the data rate that needs support and the judgement of the corresponding relation between radio configuration business change type
(A) base station receives the bearer update request message of mobile switching centre's simulator, includes A2p (the media bearer interface between MGW and the BSC) carrying specific format parameter (Bearer Format-SpecificParameters) information unit in this message;
(B) according to the regulation of 3GPP2 agreement, the bear format that in A2p Bearer Format-Specific Parameters information unit, can only carry a kind of voice at most; The base station judges whether the Bearer Format ID that carries among the A2p Bearer Format-SpecificParameters is dual-tone multifrequency (DTMF, Dual Tone Multi-Frequency), if then business change flow process finishes, promptly the secondary negotiation is not carried out with MS in the base station;
(C) if the base station judges that the bear format of carrying in the bearer update request message is a dual-tone multifrequency, whether the bear format of carrying in the then more described bearer update request message is identical with current bear format, if identical, then business change flow process finishes, and promptly the secondary negotiation is not carried out with MS in the base station;
(D) if in the described bearer update request message bear format of carrying and current bear format inequality and corresponding be not with a kind of business option, then the base station is according to the corresponding relation of bear format in the table 1 and business option, obtain the bear format of carrying in the described bearer update request message and current bear format corresponding service option, according to the corresponding relation between business option in the table 2 and the radio configuration and according to the relation of the data rate of radio configuration in the table 3 and support, the data rate of Zhi Chiing is determined corresponding radio configuration as required again; Only listed business option commonly used at present in this table, under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art can replenish it and add.
Table 1
| Speech coding | Business option | Bear format ID |
| EVRC | 0003H | 3、4 |
| QCELP 13K | 8000H，0011H | 2 |
| QCELP 8K | 0001H | 15 |
| SMV | 0038H | 5、6 |
Table 2
| Forward direction RC | RC1 | RC2 | RC3 | RC4 | RC5 |
| Business option | 0001H、0003H | 8000H (0011H) | 0001H、0003H | 0001H、0003H | 8000H (0011H) |
| Speech coding | 8K、EVRC | 13K | 8K、EVRC | 8K、EVRC | 13K |
| Reverse RC | RC1 | RC2 | RC3 | RC4 | |
| Business option | 0001H、0003H | 8000H (0011H) | 0001H、0003H | 8000H (0011H) | |
| Speech coding | 8K、EVRC | 13K | 8K、EVRC | 13K |
Table 3
In the table 3, annotate 1 (153600
1): code rate=1/4; Annotate 2 (307200
2): code rate=1/2
(E1) if selected radio configuration equates that with original radio configuration then business change process is only changed business option and do not changed radio configuration;
(E2) if selected radio configuration and original radio configuration are unequal, then business change process is not only changed business option but also change radio configuration.
Referring to Fig. 2, only change business option with regard to professional change process below and do not change the detailed process of radio configuration and be described as follows:
Mobile switching centre's simulator sends the bearer update request message to the base station, carries A2p bear format parameter in this message, and timer Tyyp is set simultaneously; This bear format parameter includes can determine that MGW is the bear format of this call distribution and A2p carrying session level parameter (Bearer Session-LevelParameters) field and/or the A2p Bearer Format-Specific Parameters information unit of transport address.
The base station is after receiving the bearer update request message of mobile switching centre's simulator, the bear format of carrying in the message and the bear format of current calling are compared, and according to bear format, business option, need the data rate supported and the corresponding relation between the radio configuration to judge business change only to change business option and do not change radio configuration, then comprise the steps:
(1) base station will include this business request information of calling out new business option of assigning and be sent to travelling carriage;
(2) whether the base station is 0 according to the flag bit RESP_PURPOSE in the service response message of travelling carriage feedback, judges whether travelling carriage supports the business option of described new appointment; If RESP_PURPOSE is 0, expression MS has accepted the new business configuration of base station, then the base station professional connection message that will include new business configuration is sent to travelling carriage, after message was finished in the business connection of receiving the travelling carriage feedback, the base station was upgraded successfully by bearer update response message notice mobile switching centre simulator service bearer; If RESP_PURPOSE is not 0, expression MS has refused the new configuration of base station, and then failure is upgraded by bearer update response message notice mobile switching centre simulator service bearer in the base station.
Referring to Fig. 3, the detailed process of not only having changed business option with regard to professional change process below but also having changed radio configuration is described as follows:
Mobile switching centre's simulator sends the bearer update request message to the base station, carries A2p bear format parameter in this message, and timer Tyyp is set simultaneously; This bear format parameter includes can determine that MGW is the bear format of this call distribution and A2p carrying session level parameter (Bearer Session-LevelParameters) field and/or the A2p Bearer Format-Specific Parameters information unit of transport address.
The base station is after receiving the bearer update request message of mobile switching centre's simulator, the bear format of carrying in the message and the bear format of current calling are compared, and judge the business change process according to bear format, business option, the data rate that needs support and the corresponding relation between the radio configuration and not only change business option but also change radio configuration, then comprise the steps:
(a) base station is determined new business configuration parameter and is set up corresponding channel resources according to this business option and radio configuration of calling out new appointment;
(b) base station is sent to travelling carriage by the switch indicating information (HDM, Handoff Direction Message) that former forward traffic channel will include the new business configuration;
(c), then discharge and delete original channel resource, and upgrade successfully by bearer update response message notice mobile switching centre simulator service bearer if the feedback message that the base station receives travelling carriage is a handoff completion message; If it is switch failure information that the base station receives the feedback message of travelling carriage, then upgrade failure by bearer update response message notice mobile switching centre simulator service bearer.
Above-mentioned embodiment describes the present invention with preferred embodiment, but the example of this visualization of just lifting for the ease of understanding should not be considered to be limitation of the scope of the invention.Equally, according to the description of technical scheme of the present invention and preferred embodiment thereof, can make various possible being equal to and change or replacement, and all these changes or replacement all should belong to the protection range of claim of the present invention.
Claims (5)
1. a packet-based CDMA2000 Access Network is realized the method for business change, described business change comprises that only changing business option does not change radio configuration and not only change business option but also change two types of radio configuration, it is characterized in that, the base station is after receiving the bearer update request message of mobile switching centre's simulator, the bear format of carrying in the message and the bear format of current calling are compared, and judge the business change type according to the corresponding relation between business option and radio configuration and the data rate that needs to support:
If described business change process is only changed business option and do not changed radio configuration, then comprise the steps:
(1) base station will include this business request information of calling out new business option of assigning and be sent to travelling carriage;
(2) base station judges according to the service response message of travelling carriage feedback whether travelling carriage supports the business option of described new appointment; If support, then the base station professional connection message that will include the new business configuration is sent to travelling carriage, the business of receiving the travelling carriage feedback connect finish message after, the base station is upgraded successfully by bearer update response message notice mobile switching centre simulator service bearer; If do not support, then failure is upgraded by bearer update response message notice mobile switching centre simulator service bearer in the base station;
If described business change process is not only changed business option but also change radio configuration, then comprise the steps:
(a) base station is determined new business configuration parameter and is set up corresponding channel resources according to this business option and radio configuration of calling out new appointment;
(b) base station is sent to travelling carriage by the switch indicating information that original forward traffic channel will include the new business configuration;
(c), then upgrade successfully by bearer update response message notice mobile switching centre simulator service bearer if it is handoff completion message that the base station receives the feedback message of travelling carriage; If it is switch failure information that the base station receives the feedback message of travelling carriage, then upgrade failure by bearer update response message notice mobile switching centre simulator service bearer.
2. packet-based CDMA2000 Access Network according to claim 1 is realized the method for business change, it is characterized in that described business change is initiatively initiated by base station or mobile switching centre's simulator.
3. packet-based CDMA2000 Access Network according to claim 2 is realized the method for business change, it is characterized in that, when described business change is initiatively initiated by the base station, the base station is sent to mobile switching centre's simulator with the bearer update instruction message earlier, waits to receive the laggard industry affair of the bearer update request message change flow process of described mobile switching centre simulator.
4. packet-based CDMA2000 Access Network according to claim 2 is realized the method for business change, it is characterized in that, when described business change was initiatively initiated by mobile switching centre's simulator, mobile switching centre's simulator directly sent the bearer update request message to the base station.
5. realize the method for business change according to claim 1,3 or 4 described packet-based CDMA2000 Access Networks, it is characterized in that, described base station compares the bear format of carrying in the bearer update request message and the bear format of current calling, and according to the corresponding relation judgement business change type between the data rate of business option and radio configuration and needs support, specific as follows:
The base station judges whether the bear format of carrying in the bearer update request message is dual-tone multifrequency, if then business change flow process finishes; If not, then whether the bear format of carrying in the more described bearer update request message in base station is identical with current bear format, if identical, then business change flow process finishes; If it is different, then the base station is according to the corresponding relation of bear format and business option, obtain the bear format of carrying in the described bearer update request message and current bear format corresponding service option, determine corresponding radio configuration according to corresponding relation between business option and the radio configuration and the data rate that needs to support; Relatively whether Xuan Ding radio configuration and original radio configuration equate; If equate that then business change process is only changed business option and do not changed radio configuration, if do not wait, then business change process is not only changed business option but also change radio configuration.
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| CN101217799B (en) * | 2008-01-17 | 2011-10-26 | 中兴通讯股份有限公司 | A method and base station compatible with abnormal terminals |
| CN102348165B (en) * | 2010-08-02 | 2014-01-01 | 阿尔卡特朗讯 | Method for supporting broadcast multicast service of access terminal in base station control equipment |
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| Title |
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| Interoperability Specification(IOS) for cdma2000AccessNetwork Interfaces-Part3 Features. 3RD，GENERATION，PARTNERSHIP，PROJECT2.3GPP2 A.S0013-C，第Version 1.0卷. 2005 |
| Interoperability Specification(IOS) for cdma2000AccessNetwork Interfaces-Part3 Features. 3RD,GENERATION,PARTNERSHIP,PROJECT2.3GPP2 A.S0013-C,第Version 1.0卷. 2005 * |
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