CN1980418A - Transmission method of Qcclp 8k voice group in CDMA2000 traditional terminal field - Google Patents
Transmission method of Qcclp 8k voice group in CDMA2000 traditional terminal field Download PDFInfo
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- CN1980418A CN1980418A CNA2005101261974A CN200510126197A CN1980418A CN 1980418 A CN1980418 A CN 1980418A CN A2005101261974 A CNA2005101261974 A CN A2005101261974A CN 200510126197 A CN200510126197 A CN 200510126197A CN 1980418 A CN1980418 A CN 1980418A
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Abstract
In procedure of building conversation, source base station or/and destination base station determine to use Qcelp 8k coding in this conversation, and determine parameters in the load supporting format; source base station or/and destination base station together with MSCe accomplish negotiation of the load supporting format, and builds RTP conversation; according to determined the load supporting format, source base station and destination base station compress speech data to accomplish 'User Traffic'encapsulation, and to package packet, which is sent out through IP network, and to base station at opposite terminal through media gateway; after receiving RTP packet, base station at opposite terminal parses out 'User Traffic' user data and obtains compressed payload of speech data after load format process. The invention solves issues of negotiating Qcelp 8k parameters in the load supporting format by outband of Alp interface, and transferring Qcelp 8k speech data through RTP.
Description
Technical field
The present invention relates to a kind of high pass Qualcomm Code Excited Linear Prediction (QCELP) (QUALCOMM ' S CodeExcited Linear Prediction:Qcelp) transmission method of 8k packets of voice on Internet protocol (InternetProtocol:IP) network, relate to a kind of CDMA2000 traditional mobile terminal territory (Legacy Mobile Station Domain:LMSD) especially and go up the transmission method of realization Qcelp 8k packets of voice on IP network.
Background technology
Packet-based CDMA2000 base station sub-system (Base Station Subsystem:BSS) can adopt the IP switching technology to be linked into the CDMA2000 core net of realization based on soft switch.Moving switching subsystem (Mobile Switching Subsystem:MSS) system with traditional circuit domain compares, being to call out control based on the variation of the CDMA2000 core net maximum of soft switch separates with carrying, replace time division multiplexing (Time Division Multiplexing:TDM) technology with the Packet Based Network technology, traditional mobile switching centre (Mobile Switching Center:MSC) network element is evolved into mobile switching centre's simulator (Mobile Switching Center emmulation:MSCe) and media gateway (Media GateWay:MGW), MSCe provides and calls out control and mobile management function, MGW provides media control function, and transfer resource is provided, have the Media Stream operating function.
Media gateway MGW need be connected with selector unit (Selection and Distribution Unit:SDU) foundation carrying in the base station system according to the relevant information that obtains under the control of MSCe.This process is called bearing parameter and consults.
Past, the CDMA Access Network need convert the speech data of various employing compressed voice encoding and decoding techniques to pulse code modulation (PulseCoded Modulation:PCM) code stream by the TDM circuit transmission by vocoder (Vocoder) based on the transmission means of TDM circuit.Adopt the transmission means of IP switching technology, the CDMA Access Network can not need to carry out the conversion of various encoding and decoding speechs, and directly the speech data with compression divides into groups to transmit by IP network as RTP (Real-Time Transport Protocol:RTP).
RTP can provide the real-time Transmission of various sound medium and video media, has autgmentability flexibly.For satisfying specific application, a complete RTP standard comprises the complete document of being made up of one or more RTP configuration file and payload format standard.
So-called RTP configuration file is to carry out voice and video with minimum session control to consult, it has illustrated the implication of RTP attribute field, and make it to be applicable to the voice and video meeting, but also be RTP datagram header PT (Payload Type) Field Definition the pairing load type of encoding and decoding.Be applicable to that the configuration file that voice and video is used can be referring to Request for Comment: 3551 (Request forComments:3551:RFC3551).
RTP load configuration file (RTP Payload Profile) has been enumerated a series of codings, and these codings have comprised specific media data compression or the payload format (Payload Format) of representing and encapsulating on RTP; This configuration file has also been specified a short name word (ShortName) for every kind of coding, and these titles can be used by the control protocol of high level, is that selected coding is specified in a specific RTP session.For example Session Description Protocol (Session Description Protocol:SDP) (RFC2327).When needing to use unlisted other codings of file under RTP load configuration file, employed title need be registered as the internet mail extension of many purposes (Multi-Purpose Internet MailExtensions:MIME) subtype by IANA (the internet address assignment of Internet Assigned Numbers Authority mechanism).The title that this logon mode can guarantee to distribute to other codings is unique.
Except distributing title to give the coding, RTP load configuration file also be wherein some coding assignment static RTP load type number.Yet the load type numbering space is smaller comparatively speaking, can not exist or in the future coding assignment load type numbering for all.RTP developing stage in early days is not because there are other clear and definite mechanism to bind coding and load type, so be necessary to distribute the static load type to give coding.In order to solve this contradiction, SDP has defined the mechanism of a dynamic load type binding, this mechanism is together with the call parameter that is increased, for example the RTP time stamp clock rate (time stampclock rate) and the number of channel etc., register name and a load type numbering of coding/payload format are associated, this association is only effective during the RTP session, carries out the binding of dynamic load type during this.Therefore, the load type numbering can be reused for different codings during different sessions, and the restriction of numbering space is just avoided like this.Configuration file carries out dynamic assignment with the load type numbering reservation of scope in 96～127.Do not indicate this mapping just should not use the dynamic load type if there is well-defined mechanism.Those expectations should not distributed to their specific codings with specific, fixing load type with other system carries out interoperability under this configuration file system, and should adopt the mode of dynamic binding.
So-called payload format normalized definition the load data of a particular type how on RTP, to transmit, payload format can be used under a plurality of configuration files, defines so they can be independent of any specific configuration file.The payload format that is applicable to Enhanced Variable Rate Coder (Enhanced Variable RateCoder:EVRC) and alternative mode phonetic vocoder (Selectable Mode Vocoder:SVM) can be referring to RFC3558; The bear format that is applicable to Qcelp 13K can be referring to RFC2658.
Several code/decode formats for the CDMA2000 support: Qcelp 13k, EVRC, SMV have relevant RFC standard to define the RTP bear format, but Qcelp 8k is not supported.Qcelp8k is a kind of voice encoding and decoding format that early stage cdma system is supported, the main flow coded format is Qcelp 13k, EVRC and SMV at present, but the terminal use varies in the network environment of reality, and the mobile phone of certain customers is only supported Qcelp 8k.If use packet-based CDMA2000 Access Network and substitute legacy network based on the core net of soft switch, the part this network under only supports that the mobile phone general of Qcelp 8k inevitably can't access network like this.Can use for this situation operator and to replace methods such as mobile phone as the user and solve, but can cause certain inconvenience to the user undoubtedly.
Summary of the invention
The present invention proposes a kind of CDMA2000 traditional mobile terminal territory to realize the transmission method of Qcelp 8k packets of voice on IP network at above-mentioned problems of the prior art.
CDMA2000 LMSD will realize in the territory transmission of Qcelp 8k on IP network, must solve the problem of two aspects:
1, the negotiation of bear format parameter makes the transmission of conversation and receiving terminal all know the bear format parameter that this session is used;
2, user data is in the frame format encapsulation of user's face business (User Traffic) layer,, speed adjustment quiet to realize, interweaves and the multiframe function.
The present invention solves above-mentioned technical problem by following technical solution:
A kind of Qcelp 8k packets of voice comprises the steps: at the transmission method in CDMA2000 conventional terminal territory
(a) session is set up in the process, source base station or/and the purpose base station determine that this session uses be encoded to high pass Qualcomm Code Excited Linear Prediction (QCELP) Qcelp 8k, and determine the bear format parameter of this session;
(b) source base station or/and purpose base station and the simulator MSCe of mobile switching centre finish the negotiation of bear format and set up the RTP session;
(c) source base station and purpose base station are finished the encapsulation of user's face operation layer with the speech data of compression according to the payload format of determining, seal into the RTP grouping then and send by IP network, send to the base station, opposite end by media gateway;
(d) after purpose base station and source base station are received the RTP grouping, solve user's face operation layer user data and, obtain the speech data payload of compression according to the processing of load lattice.
Further, above-mentioned transmission method also can have following characteristics: in the bear format parameter of determining in the described step (a), bear format ID value is 8～15.
Further, above-mentioned transmission method also can have following characteristics: in the bear format parameter of determining in the described step (a), load type is set to dynamic bearer types.
Further, above-mentioned transmission method also can have following characteristics: in the bear format parameter of determining in the described step (a), frame format is used the payload format RFC2658 of Qcelp 13k, perhaps maneuvering load frame format RFC3558.
Further, above-mentioned transmission method also can have following characteristics: in the described step (b), when source base station determines to use Qcelp 8k coding, and the bear format negotiation between MSCe is carried out following steps by the A1p interface and finished: source base station rises exhales, and the bear format parameter of in the connection management business request information this base station being supported sends to MSCe; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends the assignment request message that carries described bear format parameter to source base station; After source base station is received, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send to assign and finish message to this MSCe with corresponding mobile terminal.
Further, above-mentioned transmission method also can have following characteristics: in the described step (b), when Qcelp 8k coding determine to be used in source base station and/or purpose base station, and the bear format negotiation between MSCe is carried out following steps by the A1p interface and finished: source base station and/or purpose base station are finished the bear format parameter of in the message this base station being supported in appointment and are sent to MSCe; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends the bearer update request message that carries described bear format parameter to source base station and/or purpose base station; After receive source base station and/or purpose base station, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send the bearer update response message to this MSCe with corresponding mobile terminal.
Further, above-mentioned transmission method also can have following characteristics: in the described step (b), when Qcelp 8k coding determine to be used in the purpose base station, and the bear format negotiation between MSCe is carried out following steps by the A1p interface and finished: the purpose base station sends to MSCe with the bear format parameter that this base station is supported in page-response message; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends the assignment request message that carries described bear format parameter to the purpose base station; After receive the purpose base station, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send to assign and finish message to this MSCe with corresponding mobile terminal.
Further, above-mentioned transmission method also can have following characteristics: in the described step (b), when source base station determines to use Qcelp 8k coding, and the bear format negotiation between MSCe is carried out following steps by the A1p interface and finished: source base station rises exhales, and the bear format parameter of in the connection management business request information this base station being supported sends to MSCe; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends assignment request message to source base station, but does not carry the bear format parameter; Source base station returns to assign finishes message; MSCe brings source base station with the bear format parameter again in the bearer update request message; After source base station is received, determine that this session uses the Qcelp8k coding, after setting up corresponding channel resources and consulting, send the bearer update response message to this MSCe with corresponding mobile terminal.
Further, above-mentioned transmission method also can have following characteristics: in the described step (b), when Qcelp 8k coding determine to be used in the purpose base station, and the bear format negotiation between MSCe is carried out following steps by the A1p interface and finished: the purpose base station sends to MSCe with the bear format parameter that this base station is supported in page-response message; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends assignment request message to the purpose base station, but does not carry the bear format parameter; The purpose base station is returned to assign and is finished message; MSCe brings the purpose base station with the bear format parameter again in the bearer update request message; After receive the purpose base station, determine that this session uses the Qcelp8k coding, after setting up corresponding channel resources and consulting, send to assign and finish message to this MSCe with corresponding mobile terminal.
Further, above-mentioned transmission method also can have following characteristics: in the described step (b), MSCe judges whether its bear format with source base station and purpose base station negotiate is consistent, if it is consistent, then set up and exempt from a yard type conversion operations session, otherwise, the session of long-range sign indicating number type conversion operations set up.
Further, above-mentioned transmission method also can have following characteristics: in the described step (c), if conversation type for exempting from a yard type conversion operations session, the packets of voice that media gateway directly sends over source base station or purpose base station passes through the base station, opposite end; If conversation type is the session of long-range sign indicating number type conversion operations, then media gateway need be carried out deblocking and code conversion to the RTP grouping of receiving, is packaged into the RTP grouping again and sends to the base station, opposite end.
Utilize method of the present invention, can effectively solve A1p interface band and consult the problem that Qcelp 8k bear format parameter and Qcelp 8k speech data transmit outward on RTP.
Description of drawings
Fig. 1 is A2p carrying session-level parameter;
Fig. 2 is A2p carrying specific format parameter;
Fig. 3 is the schematic diagram of the embodiment of the invention one Qcelp 8k voice packet transfer process;
Fig. 4 is the schematic diagram of the embodiment of the invention two Qcelp 8k voice packet transfer processes;
Fig. 5 is the schematic diagram of the embodiment of the invention three Qcelp 8k voice packet transfer processes.
Embodiment
In general, can use high-rise control protocol such as SDP to carry out the negotiation of bear format parameter at transmitting terminal and receiving terminal.3G IOS V5.0 does not directly use the SDP agreement at the A1p interface, comes selected coding is specified in specific session but carry corresponding bear format parameter by expansion A1 (signaling structure between traditional B SC and the MSC) interface control messages.
Mime type name-" Audio (voice) ", because CDMA2000 LMSD only finishes voice functions and implicit difiinition at A1p/A2p (business interface between CDMA2000 LMSD territory BSS and the MSW), MIME subtype name-coding title is then shone upon by bear format ID (Bearer FormatID) field of bearing parameter, the consultation parameter Payload Type (load type) of SDP and maximum binding time (maxptime) and maximum interweave the time (maxinterleave) also carry by corresponding bearing parameter field.Wherein, depend on the mapping relations of bear format ID and coding title, transmitting terminal and receiving terminal can be determined the selected payload format of special session.Bearing parameter described here sees also Fig. 1 and Fig. 2.Among the present invention, the MIME subtype name of Qcelp 8k-coding name is called " Qcelp 8k ".
In base station controller (BSC) side, user adaptation layer is responsible for the processing and the conversion of User Data Protocol in the BSC, and by A1p and chain of command interacting message leading subscriber face resource, relates generally to the A2p interface.User adaptation layer is handled by SDU, and SDU finishes the processing of encapsulation, User Traffic Frame Protocol of the various frame formats of user data User Traffic to realize speed adjustment and Dim﹠amp; Functions such as Burst.
Bear format ID and corresponding codes title, RTP load type (Paload Type) and meaning that User Traffic protocol layer is supported are as shown in table 1, specifically adopt which kind of RTP load type, determine when being with outer the negotiation by the A1p interface.
Table 1: bear format ID and RTP load type
| Bear format ID | The coding title | The RTP | Meaning | |
| 0 | PCMU | 0 | Mu restrains (G.711) | |
| 1 | PCMA | 8 | A restrains (G.711) | |
| 2 | QCELP | 12 | Complete QCELP | |
| 3 | EVRC | Dynamic value (96～127) | Complete EVRC | |
| 4 | EVRCO | Dynamic value (96～127) | EVRC without a |
|
| 5 | SMV | Dynamic value (96～127) | |
|
| 6 | SMVO | Dynamic value (96～127) | SMV without a |
|
| 7 | Telephone-even t | Dynamic value (96～127) | DTMF numeral ﹠ sound incident | |
| 15 | QCELP 8k | Dynamic value (96～127) | Complete QCELP 8k | |
| Other is worth reservation | ||||
Media gateway MGW need be connected with SDU (selector unit) foundation carrying in the base station system according to the relevant bearer format information that obtains under the control of MSCe.
The bearer negotiation process has been introduced two notions: exempt from a yard type conversion operations (Transcoder FreeOperation:TrFO) and long-range sign indicating number type conversion operations (Remote Transcoder Operation:RTO).
TrFO directly transmits compressed voice on the bearer path of Packet Based Network between the traditional mobile terminal (MS), remove codec from.In a calling, 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, just might use single preferred compressed voice to transmit on the net in whole group, improve bandwidth availability ratio, and reduced the loop time-delay.TrFO can improve speech quality, and TrFO is not used in multimedia domain, MMD VoIP voice, is the ability in LMSD territory.The required Transcoder (vocoder) 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.RTO does not also mean that Tandem (cascade) operation.For example, in order to support the calling of portable terminal-public fixed telephone network (MS-PSTN), need in MGW or base station controller (BSC), insert sign indicating number type transducer.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 that this usage uses 2 sign indicating number type transducers that the sign indicating number type of 2 end nodes is converted to.RTO is the special case of TrFO.
Below in conjunction with the drawings and specific embodiments the present invention is further introduced, but not as a limitation of the invention.
Embodiment one:
With reference to shown in Figure 3, if source BS carries the negotiation that the A2p bearing parameter is finished bear format by connection management business request information (ConnectionManagement Service Request), purpose BS carries the negotiation that the A2p bearing parameter is finished bear format by page-response message (Paging Response), and present embodiment realizes that the method that the Qcelp8K speech data transmits may further comprise the steps between this MS and purpose MS:
Step 101: source BS and MSCe finish the negotiation of bear format, are specially:
(a1) portable terminal rises and exhales, source BS sends to MSCe with the bear format parameter that this BS supports in the connection management business request information, the corresponding relation that RTP load type in the A2p carrying specific format parameter (A2p BearerFormat-Specific Paramaters) of carrying and bear format ID have determined speech coding frame format and RTP load type;
That supposes that source BS determines that this session need use is encoded to Qcelp 8K, then uses the bear format ID value that keeps, and span is 8～15, is assumed to 15 herein.The coding title is QCELP 8k, and load type is dynamic bearer types value, and frame format is used the payload format RFC2658 of Qcelp 13K, and payload format also can be suitable for the payload format standard RFC3558 of EVRC, SMV in another embodiment.
The pairing frame length of rate mode of wherein corresponding speech frame is as shown in table 2, and the MIME subtype of Qcelp 8K correspondence is Qcelp 8K, other and consistent.The most-significant byte of Frame shown in the table is used for representing the type of frame.
Table 2: rate mode and Frame length
| Most-significant byte byte | Rate mode | Frame length (byte) | |
| 0 | |
1 | |
| 1 | 1/8 | 3 | 16 |
| 2 | 1/4 | 6 | 40 |
| 3 | 1/2 | 11 | 80 |
| 4 | 1 | 23 | 171 |
| 5 | Keep | 8 | |
| 14 | |
1 | |
| Other | N/A | Keep | The frame of mistake |
(b1) MSCe determines this session use Qcelp 8k according to bear format parameter and MGW ability that source BS sends, then sends the assignment request message that carries described bearing parameter to source BS;
(c1) after source BS receives the assignment request message that MSCe issues, determine this session for using Qcelp 8k, set up corresponding channel resources and, send to assign and finish message to this MSCe with after corresponding MS consults according to bear format wherein.
Step 102:MSCe and purpose BS finish the negotiation of bear format, are specially:
(a2) portable terminal is exhaled, and purpose BS sends to MSCe with the bear format parameter that this BS supports in page-response message, and its bear format of determining can be identical with source BS, also can be different;
(b2) MSCe determines this session use Qcelp 8k according to bear format parameter and MGW ability that purpose BS sends, and sends the assignment request message that carries described bearing parameter to purpose BS;
(c2) after purpose BS receives the assignment request message that MSCe issues, determine this session for using Qcelp 8k, set up corresponding channel resources and, send to assign and finish message to this MSCe with after corresponding MS consults according to bear format wherein.
Whether step 103:MSCe is consistent with the bear format that purpose BS consults according to its bear format of consulting with source BS and its, sets up corresponding conversation type: if both bear format unanimities are then set up the TrFO session, finish the TrFO calling, carry out next step; If both are inconsistent, then set up the RTO session, finish RTO and call out;
Step 104: after session is set up, source BS and purpose BS will finish the encapsulation of User Traffic layer from the speech data of the compression of eating dishes without rice or wine to receive respectively according to the payload format of determining, be packaged into the RTP grouping then respectively, send to MGW by IP network;
Step 105: if conversation type is RTO, after the RTP grouping that source BS that MGW receives and purpose BS send, the RTP grouping that receives is solved User Traffic user data, handle according to payload format then, obtain the speech data payload of compression, after carrying out speech coding conversion by the VTC vocoder, again the speech data of compression is finished the encapsulation of User Traffic layer according to the payload format of determining, be packaged into the RTP grouping then and send to opposite end BS by IP network;
If conversation type is TrFO, the packets of voice that MGW directly sends over purpose BS directly passes through source BS.
Step 106: source BS and purpose BS solve User Traffic user data with the RTP grouping that receives, and handle User Traffic user data according to payload format, obtain the speech data payload of compression, send to corresponding MS then by eating dishes without rice or wine.
Embodiment two:
With reference to shown in Figure 4, source BS and purpose BS all finish message (AssignmentComplete) by assignment and carry the negotiation that the A2p bearing parameter is finished bear format, and present embodiment realizes that the method that Qcelp 8k speech data transmits may further comprise the steps between this MS and purpose MS:
Step 201: source BS and MSCe finish the negotiation of bear format, are specially:
(a11) portable terminal rises and exhales, and source BS finishes the bear format parameter of in the message this BS being supported in assignment and sends to MSCe;
(b11) MSCe determines this session use Qcelp 8k according to bear format parameter and MGW ability that source BS sends, then sends the bearer update request message that carries described bearing parameter to source BS;
(c11) after source BS receives the bearer update request message that MSCe issues, determine that according to bear format wherein this session uses Qcelp 8k, set up channel resource, send the bearer update response message then to MSCe with corresponding MS.
Step 202:MSCe and purpose BS finish the negotiation of bear format, are specially:
(a12) portable terminal is exhaled, purpose BS finishes the bear format parameter of in the message this BS being supported in assignment and sends to MSCe, present embodiment supposition purpose BS determines that this session need use is encoded to Qcelp 8K, bear format ID value is 15, the coding title is QCELP 8k, and load type is dynamic bearer types value, and frame format is used the payload format RFC2658 of Qcelp 13K, the bear format of source BS can be identical, also can be different.
(b12) MSCe determines this session use Qcelp 8k according to bear format parameter and MGW ability that purpose BS sends, and sends the bearer update request message that carries described bearing parameter to purpose BS;
(c12) after purpose BS receives the bearer update request message that MSCe issues, determine this session for using Qcelp 8k, set up channel resource, send the bearer update response message then to MSCe with corresponding MS according to bear format wherein.
Step 203-step 206 is corresponding consistent with the step 103-step 106 of embodiment one, omits herein and describes.
Embodiment three:
With reference to shown in Figure 5, present embodiment realizes that the method that the Qcelp8K speech data transmits may further comprise the steps between this MS and purpose MS:
Step 301: source BS and MSCe finish the negotiation of bear format, are specially:
(a13) portable terminal rises and exhales, and source BS sends to MSCe with the bear format parameter that this BS supports in the connection management business request information;
(b13) MSCe determines this session use Qcelp 8k according to bear format parameter and MGW ability that source BS sends, then send assignment request message to source BS, but this message does not carry described bearing parameter;
(c13) after source BS receives the assignment request message that MSCe sends, send to assign to MSCe and finish message;
(d13) MSCe receive source BS send assign finish message after, carry described bearing parameter by the bearer update request message and send to source BS;
(e13) source BS receives the bearer update request message that MSCe issues, and then determines this session for using Qcelp 8k according to wherein bear format, sets up corresponding channel resources and with after corresponding MS consults, sends to assign and finish message to this MSCe.
Step 302:MSCe and purpose BS finish the negotiation of bear format, are specially:
(a23) portable terminal is exhaled, and purpose BS sends to MSCe with the bear format parameter that this BS supports in page-response message;
(b23) MSCe determines this session use Qcelp 8k according to bear format parameter and MGW ability that purpose BS sends, and sends assignment request message to purpose BS, but this message does not carry described bearing parameter;
(c23) purpose BS receive MSCe send after the assignment request message, send to assign to MSCe and finish message;
(d23) MSCe receive purpose BS send assign finish message after, carry described bearing parameter by the bearer update request message and send to purpose BS;
(e23) after purpose BS receives the bearer update request message that MSCe issues, determine this session for using Qcelp 8k, set up corresponding channel resources and, send to assign and finish message to this MSCe with after corresponding MS consults according to bear format wherein.
Step 303-step 306 is corresponding consistent with the step 103-step 106 of embodiment one, omits herein and describes.
Certainly, the present invention also can have other various embodiments, for example, when the bear format parameter of this BS being supported in by the connection management business request information as source BS sent to MSCe, purpose BS also can finish message (Assignment Complete) by assignment and carry the A2p bearing parameter and send to MSCe.Can be with among above-mentioned 3 embodiment, source BS and purpose BS finish bear format negotiation the mode independent assortment and obtain new embodiment.Under the situation that does not deviate from spirit of the present invention and essence thereof, various corresponding change that those of ordinary skill in the art make the present invention and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1, a kind of Qcelp 8k packets of voice comprises the steps: at the transmission method in CDMA2000 conventional terminal territory
(a) session is set up in the process, source base station or/and the purpose base station determine that this session uses be encoded to high pass Qualcomm Code Excited Linear Prediction (QCELP) Qcelp 8k, and determine the bear format parameter of this session;
(b) source base station or/and purpose base station and the simulator MSCe of mobile switching centre finish the negotiation of bear format and set up the RTP session;
(c) source base station and purpose base station are finished the encapsulation of user's face operation layer with the speech data of compression according to the payload format of determining, seal into the RTP grouping then and send by IP network, send to the base station, opposite end by media gateway;
(d) after purpose base station and source base station are received the RTP grouping, solve user's face operation layer user data and, obtain the speech data payload of compression according to the processing of load lattice.
2, transmission method as claimed in claim 1 is characterized in that, in the bear format parameter of determining in the described step (a), bear format ID value is 8～15.
3, transmission method as claimed in claim 1 is characterized in that, in the bear format parameter of determining in the described step (a), load type is set to dynamic bearer types.
4, transmission method as claimed in claim 1 is characterized in that, in the bear format parameter of determining in the described step (a), frame format is used the payload format RFC2658 of Qcelp 13k, perhaps maneuvering load frame format RFC3558.
5, transmission method as claimed in claim 1, it is characterized in that, in the described step (b), when source base station determines to use Qcelp 8k coding, and the bear format negotiation between MSCe is carried out following steps by the Alp interface and finished: source base station rises exhales, and the bear format parameter of in the connection management business request information this base station being supported sends to MSCe; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends the assignment request message that carries described bear format parameter to source base station; After source base station is received, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send to assign and finish message to this MSCe with corresponding mobile terminal.
6, transmission method as claimed in claim 1, it is characterized in that, in the described step (b), when Qcelp 8k coding determine to be used in source base station and/or purpose base station, and the bear format negotiation between MSCe is carried out following steps by the Alp interface and finished: source base station and/or purpose base station are finished the bear format parameter of in the message this base station being supported in appointment and are sent to MSCe; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends the bearer update request message that carries described bear format parameter to source base station and/or purpose base station; After receive source base station and/or purpose base station, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send the bearer update response message to this MSCe with corresponding mobile terminal.
7, transmission method as claimed in claim 1, it is characterized in that, in the described step (b), when Qcelp 8k coding determine to be used in the purpose base station, and the bear format negotiation between MSCe is carried out following steps by the Alp interface and finished: the purpose base station sends to MSCe with the bear format parameter that this base station is supported in page-response message; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends the assignment request message that carries described bear format parameter to the purpose base station; After receive the purpose base station, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send to assign and finish message to this MSCe with corresponding mobile terminal.
8, transmission method as claimed in claim 1, it is characterized in that, in the described step (b), when source base station determines to use Qcelp 8k coding, and the bear format negotiation between MSCe is carried out following steps by the Alp interface and finished: source base station rises exhales, and the bear format parameter of in the connection management business request information this base station being supported sends to MSCe; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends assignment request message to source base station, but does not carry the bear format parameter; Source base station returns to assign finishes message; MSCe brings source base station with the bear format parameter again in the bearer update request message; After source base station is received, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send the bearer update response message to this MSCe with corresponding mobile terminal.
9, transmission method as claimed in claim 1, it is characterized in that, in the described step (b), when Qcelp 8k coding determine to be used in the purpose base station, and the bear format negotiation between MSCe is carried out following steps by the Alp interface and finished: the purpose base station sends to MSCe with the bear format parameter that this base station is supported in page-response message; This MSCe determines this session use Qcelp 8k according to the ability of this bear format parameter received and media gateway, sends assignment request message to the purpose base station, but does not carry the bear format parameter; The purpose base station is returned to assign and is finished message; MSCe brings the purpose base station with the bear format parameter again in the bearer update request message; After receive the purpose base station, determine that this session uses Qcelp 8k coding, after setting up corresponding channel resources and consulting, send to assign and finish message to this MSCe with corresponding mobile terminal.
10, transmission method as claimed in claim 1 is characterized in that, in the described step (b), MSCe judges whether its bear format with source base station and purpose base station negotiate is consistent, if consistent, then set up and exempts from a yard type conversion operations session, otherwise, set up the session of long-range sign indicating number type conversion operations.
11, transmission method as claimed in claim 10 is characterized in that, in the described step (c), if conversation type for exempting from a yard type conversion operations session, the packets of voice that media gateway directly sends over source base station or purpose base station passes through the base station, opposite end; If conversation type is the session of long-range sign indicating number type conversion operations, then media gateway need be carried out deblocking and code conversion to the RTP grouping of receiving, is packaged into the RTP grouping again and sends to the base station, opposite end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101261974A CN100544522C (en) | 2005-12-01 | 2005-12-01 | Qcelp 8k packets of voice is at the transmission method in CDMA2000 conventional terminal territory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101261974A CN100544522C (en) | 2005-12-01 | 2005-12-01 | Qcelp 8k packets of voice is at the transmission method in CDMA2000 conventional terminal territory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1980418A true CN1980418A (en) | 2007-06-13 |
| CN100544522C CN100544522C (en) | 2009-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101261974A Expired - Fee Related CN100544522C (en) | 2005-12-01 | 2005-12-01 | Qcelp 8k packets of voice is at the transmission method in CDMA2000 conventional terminal territory |
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| CN (1) | CN100544522C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011054321A1 (en) * | 2009-11-09 | 2011-05-12 | 中兴通讯股份有限公司 | Method and apparatus for transmitting dual tone multiple frequency tones |
| CN105282734A (en) * | 2014-06-11 | 2016-01-27 | 中国移动通信集团公司 | Method, terminal, wireless gateway and system for realizing cross-network confidential communication |
-
2005
- 2005-12-01 CN CNB2005101261974A patent/CN100544522C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011054321A1 (en) * | 2009-11-09 | 2011-05-12 | 中兴通讯股份有限公司 | Method and apparatus for transmitting dual tone multiple frequency tones |
| CN105282734A (en) * | 2014-06-11 | 2016-01-27 | 中国移动通信集团公司 | Method, terminal, wireless gateway and system for realizing cross-network confidential communication |
| CN105282734B (en) * | 2014-06-11 | 2018-10-26 | 中国移动通信集团公司 | A kind of method that realizing across a network secret telephony, terminal, radio network gateway and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100544522C (en) | 2009-09-23 |
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