CN101801028B - Method, device and system for informing business option information and transmitting voice - Google Patents

Abstract

The embodiment of the invention discloses a method, device and system for notifying service option information and voice transmission. The implementation of the method includes: receiving the service option information of the calling terminal sent by the mobile service switching center on the called network side; receiving the voice compression code stream transparently transmitted by the calling network side, and the voice compression code stream is passed through sending to the calling network side over the air interface; performing voice encoding and decoding on the voice compression code stream according to the service option information of the calling terminal. Send the service option information of the local end to the BSC of the opposite end, and place the voice codec processing on the BSC; the BSC of the opposite end performs the voice codec processing, and the voice compressed code stream received by the air interface of the local end can be transparent in the core network Transmission; Realize the IP-based call on the CDMA network that needs to carry high security requirements, and achieve the purpose of saving bandwidth.

Description

Method, device and system for informing service option information, voice transmission

technical field

The invention relates to the technical field of communication, in particular to a method, device and system for notifying service option information and voice transmission.

Background technique

With the popularization of Internet technology, Internet Protocol (Internet Protocol, IP) technology has been widely used in various aspects such as entertainment, work and study. The development trend of Code Division Multiple Access (CDMA), and the switching from traditional Mobile Services Switching Center (MSC) to softswitch, all choose IP as the bearer of the core network; and the A interface is in the bearer type Also gradually choose IP to replace the Time Division Multiplex (TDM) method; the A interface is the interface between the MSC and the Base Station Center (BSC), the signaling interface is A1 (called A1p when it is IP), and the service The interface is A2 (called A2p in IP). It can be seen that CDMA network transmission IP has become the trend of network evolution.

In the implementation method of traditional voice transmission, the voice codec is deployed in the mobile media gateway (Mobile Media Gateway, MGW). Operation, TrFO) is not enabled, the MGW on the calling and called network side performs voice coding and decoding, and then transmits the voice to the called terminal after passing through the core network. The terminal is connected to the network side through the air interface. In CDMA, the channel bandwidth of the air interface is 8Kbps. In the core network, the TDM mode is 64Kbps. Therefore, it is necessary to change the 8Kbps bit stream transmitted over the air interface into the 64Kbps bit stream of the core network. Voice transmission will greatly waste bandwidth. The existing traditional IP-based solution is to tell the MGW whether the packet is transparently transmitted or encoded and decoded through the real-time protocol (Real Time Protocol, RTP) header.

However, in some CDMA networks, the core network needs to carry calls with high confidentiality requirements. For example, the military calls carried in China's CDMA network have high confidentiality requirements; therefore, the call data during the transmission of the core network requires The whole process is transparently transmitted, which limits any detection of service packets by the core network. In response to the above-mentioned requirement of transparent transmission of the full name of the core network, the A interface of the core network that currently requires full transparent transmission still uses a TDM interface, and the TDM interface performs transparent transmission at 64Kbps per session.

In the process of implementing the present invention, the inventor found that the traditional IP-based solution is not suitable for this type of CDMA network because the detection of call service packets is prohibited in the CDMA network that needs to carry calls with high confidentiality requirements. In the calling CDMA network that needs to carry high confidentiality requirements, the voice channel needs to be transmitted with a bandwidth of 64Kbps, and the problem of wasting network transmission bandwidth still exists.

Contents of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a method, device and system for informing service option information and voice transmission, so as to save bandwidth.

In order to solve the above technical problems, the embodiment of the voice transmission method provided by the present invention can be realized through the following technical solutions:

receiving the service option information of the calling terminal sent by the mobile services switching center on the called network side;

receiving the voice compressed code stream transparently transmitted from the calling network side, the voice compressed code stream being sent by the calling terminal to the calling network side through the air interface;

Performing voice coding and decoding on the voice compressed code stream according to the service option information of the calling terminal.

A method of voice transmission, comprising:

receiving the service option information of the called terminal sent by the mobile service switching center on the calling network side;

Receive the voice compressed code stream transparently transmitted by the called network side, and the voice compressed code stream is sent by the called terminal to the called network side through the air interface;

performing speech encoding and decoding on the speech compression code stream according to the service option information of the called terminal.

A method of communicating information about business options, including:

receiving the routing request message sent by the home location register;

Obtaining the service option information of the calling terminal carried in the routing request message;

Sending the service option information of the calling terminal to the base station controller on the called network side.

A method of communicating information about business options, including:

receiving the message carrying the service option information of the called terminal sent by the mobile services switching center on the called network side;

Sending the service option information of the called terminal to the base station controller on the calling network side.

A base station controller comprising:

The information receiving unit is used to receive the service option information of the calling terminal sent by the mobile service switching center on the called network side;

The voice stream receiving unit is used to receive the voice compressed code stream transparently transmitted by the calling network side, and the voice compressed code stream is sent to the calling network side by the calling terminal through the air interface;

The codec unit is configured to perform voice codec on the voice compression code stream according to the service option information of the calling terminal.

A base station controller comprising:

The service option receiving unit is used to receive the service option information of the called terminal sent by the mobile service switching center on the calling network side;

The voice code receiving unit is used to receive the voice compressed code stream transparently transmitted by the called network side, and the voice compressed code stream is sent to the called network side by the called terminal through the air interface;

A voice codec unit, configured to perform voice codec on the voice compressed code stream according to the service option information of the called terminal.

A mobile service switching center, comprising:

a routing message receiving unit, configured to receive a routing request message sent by the home location register;

A first service option obtaining unit, configured to obtain service option information of the calling terminal carried in the routing request message;

The first information sending unit is further configured to send the service option information of the calling terminal to the base station controller on the called network side.

A mobile service switching center, comprising:

The service option information receiving unit is used to receive the message carrying the service option information of the called terminal sent by the mobile service switching center on the called network side;

A service option information sending unit, configured to send the service option information of the called terminal to the base station controller on the calling network side.

A communication system comprising:

The base station controller on the called network side is used to receive the service option information of the calling terminal sent by the mobile service switching center on the called network side; receive the voice compression code stream transparently transmitted by the calling network side, and the voice compression code stream Sending to the calling network side by the calling terminal through the air interface; performing voice encoding and decoding on the voice compression code stream according to the service option information of the calling terminal;

The mobile service switching center on the called network side is used to receive the routing request message sent by the home location register; obtain the service option information of the calling terminal carried in the routing request message; send the service option information of the calling terminal To the base station controller on the called network side.

The above technical solution has the following beneficial effects: the service option information of the local end is sent to the BSC of the opposite end, and the voice codec processing is placed on the BSC; the BSC of the opposite end performs the voice codec processing, and the voice received by the air interface of the local end is compressed The code stream can be transparently transmitted in the core network; it realizes IP on the call CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1A is a schematic diagram of a first method according to Embodiment 1 of the present invention;

FIG. 1B is a schematic diagram of a second method in Embodiment 1 of the present invention;

FIG. 1C is a schematic diagram of a third method in Embodiment 1 of the present invention;

FIG. 1D is a schematic diagram of a fourth method in Embodiment 1 of the present invention;

Fig. 2 is a schematic flow chart of the method of Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of a base station controller according to Embodiment 3 of the present invention;

FIG. 4 is a schematic structural diagram of another base station controller according to Embodiment 3 of the present invention;

5 is a schematic structural diagram of a base station controller according to Embodiment 4 of the present invention;

FIG. 6 is a schematic structural diagram of a mobile service switching center according to Embodiment 5 of the present invention;

FIG. 7 is a schematic structural diagram of another mobile service switching center according to Embodiment 5 of the present invention;

FIG. 8 is a schematic structural diagram of a mobile service switching center according to Embodiment 6 of the present invention;

FIG. 9A is a schematic structural diagram of a system according to Embodiment 7 of the present invention;

FIG. 9B is a schematic structural diagram of another system according to Embodiment 7 of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the embodiment of the present invention, when the A interface is IP-based, the service option (Service Option, SO) information of the calling party and the called party is notified to the BSC of the other party respectively, and the voice codec is configured in the BSC, so that no matter whether the SO information of the calling party or the called party is In the same way, the codec processing is performed by the BSC of the other party, and the voice compression code of the air interface is transparently transmitted on the A interface and the core network.

Embodiment 1, as shown in FIG. 1A, the embodiment of the present invention provides a voice transmission method, including:

101A: receiving the service option information of the calling terminal sent by the mobile service switching center on the called network side;

Specifically, the above-mentioned service option information is carried by a message with an information prompt; of course, it is also possible to carry the service option information in other messages, which does not affect the implementation of the embodiment of the present invention, and is not limited by the embodiment of the present invention.

The service option information of the calling terminal sent by the mobile switching center on the called network side includes:

Receive the route request message sent by the home location register; obtain the service option information of the calling terminal carried in the route request message; send the service option information of the calling terminal to the base station controller on the called network side.

102A: Receive the voice compressed code stream transparently transmitted from the calling network side, and the voice compressed code stream is sent by the calling terminal to the calling network side through the air interface;

103A: Perform voice encoding and decoding on the voice compression code stream according to the service option information of the calling terminal.

The format of the above-mentioned speech compression code stream can be an enhanced variable rate coder (Enhanced Variable Rate Codec, EVRC) coding format, and its bandwidth payload is 8Kbps or 13Kbps. Of course, the embodiment of the present invention does not specifically limit the format of the voice compression code stream, which does not affect the implementation of the embodiment of the present invention.

The executor of each step in the foregoing embodiments may be the BSC at the called network side, which sends the service option information of the local end to the BSC at the opposite end, and puts the speech codec processing on the BSC; the BSC at the opposite end performs the speech codec processing, Then the voice compressed code stream received by the local air interface can be transparently transmitted in the core network; the IP-based call on the CDMA network that needs to carry high security requirements is realized, and the purpose of saving bandwidth is achieved.

Further, in order to realize the correct encoding and decoding of the voice compression stream on the called network side to the BSC on the calling network side, it may also include:

The BSC on the called network side sends a paging response message to the mobile services switching center on the called network side, and the paging response message carries service option information of the called terminal. The mobile switching center on the called network side receives the paging response message sent by the base station controller on the called network side; obtains the service option information of the called terminal carried in the paging response message, and sends it to the calling network side of the mobile services switching center.

As shown in Figure 1B, corresponding to the above implementation manner, on the BSC on the calling network side, the voice transmission method may include:

101B: receiving the service option information of the called terminal sent by the mobile service switching center on the calling network side;

Specifically, the above-mentioned service option information is carried by a message with an information prompt; of course, it is also possible to carry the service option information in other messages, which does not affect the implementation of the embodiment of the present invention, and is not limited by the embodiment of the present invention.

The service option information of the called terminal sent by the mobile service switching center on the calling network side includes:

Receive the route request message sent by the home location register; obtain the service option information of the calling terminal carried in the route request message; send the service option information of the calling terminal to the base station controller on the called network side.

102B: Receive the voice compressed code stream transparently transmitted by the called network side, and the above voice compressed code stream is sent by the called terminal to the called network side through the air interface;

103B: Perform voice encoding and decoding on the voice compression code stream according to the service option information of the called terminal.

Further, in order to realize the correct encoding and decoding of the voice compression stream on the calling network side to the BSC on the called network side, it may also include:

The BSC on the calling network side sends a paging response message to the mobile services switching center on the calling network side, and the paging response message carries service option information of the calling terminal. The mobile switching center on the called network side receives the paging response message sent by the base station controller on the calling network side; obtains the service option information of the calling terminal carried in the paging response message, and sends it to the called network side of the mobile services switching center.

In the above implementation mode, the service option information of the local end is sent to the BSC of the opposite end, and the speech codec processing is placed on the BSC; the BSC of the opposite end executes the speech codec processing, and the speech compressed code stream received by the air interface of the local end can be processed on the BSC. Transparent transmission in the core network; it realizes IP on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

As shown in Figure 1C, corresponding to the implementation shown in Figure 1A, the embodiment of the present invention also provides a method for notifying the MSC of the called network side of service option information, including:

101C: receiving the routing request message sent by the home location register;

Specifically, the BSC on the calling network side sends a connection management (CallManager, CM) service request message to the MSC on the calling network side, and the service option information of the calling terminal is carried in the CM service request message; the MSC on the calling network side When sending a location request message to the home location register, the service option information of the calling terminal is carried in the location request message; when the home location register sends a routing request message to the MSC on the called network side, the routing request message carries the calling terminal Service option information of the calling terminal. The above examples of how the HLR obtains the service option information of the calling terminal should not be construed as limiting the embodiment of the present invention, and other methods are also possible.

102C: Obtain the service option information of the calling terminal carried in the routing request message;

103C: Send the service option information of the calling terminal to the base station controller on the called network side.

Further, in order to send the service option information of the called terminal to the BSC on the calling network side, on the MSC on the called network side, you can further execute:

receiving the paging response message sent by the base station controller on the called network side;

Obtain the service option information of the called terminal carried in the paging response message, and send it to the mobile service switching center on the calling network side.

In the above implementation mode, the service option information of the local end is sent to the BSC of the opposite end, so that the voice codec processing can be placed on the BSC conveniently; the BSC of the opposite end performs the voice codec processing, and the voice compressed code stream received by the air interface of the local end can be processed on the BSC. Transparent transmission in the core network; it realizes IP on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

As shown in Figure 1D, corresponding to the implementation shown in Figure 1B, the embodiment of the present invention also provides a method for notifying the MSC of the calling network side of service option information, including:

101D: receiving the message carrying the service option information of the called terminal sent by the mobile service switching center on the called network side;

Specifically, the message carrying the service option information of the called terminal sent by the mobile service switching center on the called network side is: a ringing message; of course, using other messages to carry the service option information does not affect the implementation of the embodiment of the present invention , which is not limited in this embodiment of the present invention.

102D: Send the service option information of the called terminal to the base station controller on the calling network side.

Specifically, sending the service option information of the called terminal to the base station controller on the calling network side includes:

The service option information of the called terminal is carried in a message with an information prompt and sent to the base station controller on the calling network side. Of course, the use of other messages to carry the service option information does not affect the implementation of the embodiment of the present invention, which is not limited in the embodiment of the present invention.

In the above implementation mode, the service option information of the local end is sent to the BSC of the opposite end, so that the voice codec processing can be placed on the BSC conveniently; the BSC of the opposite end performs the voice codec processing, and the voice compressed code stream received by the air interface of the local end can be processed on the BSC. Transparent transmission in the core network; it realizes IP on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

Embodiment 2. The embodiment of the present invention also provides a typical process, summarizing the method of notifying service option information and voice transmission in the entire CDMA network. As shown in FIG. 2, it is a flow chart of inter-office mobile call (IP bearer mode), in order to distinguish the NEs on the calling network side and the called network side, add "-O" to the NEs on the calling network side and "-T" on the NEs on the called network side to show the difference, including:

201: The calling terminal initiates a call, and the BSC-O where it is located sends a connection management (CallManager, CM) service request (CM Service Request) message to the MSCe-O, and the message carries the information of the cell where the MS that initiated the call is currently located , service type, called number, terminal identifier, authentication parameters, etc., and also carries the SO information of the calling terminal, and does not need to include A2p parameters.

202: MSCe-O initiates an assignment process, and sends an assignment request message (AssignmentRequest) to BSC-O to apply for air channel resources, and the message does not need to include the A2p parameter.

203: After the BSC-O successfully establishes the air channel, it returns an assignment complete message (Assignment Complete) to the MSCe-O, and the message contains the A2p parameter (the parameter contains voice codec format information).

204: MSCe-O sends an Add Request (Add Request) message to MGW-O, instructing MGW-O to establish a bearer on the calling network side according to the voice codec format carried in the A2p parameter.

205: After the MGW-O establishes the calling network side bearer, it returns an Add Reply (Add Reply) message to the MSCe, and the message contains the IP address allocated by the gateway.

206: MSCe-O analyzes the called number, sends a location request message (LOCREQ) to the Home Location Register (HLR) to which the called terminal belongs, and carries the SO information of the calling terminal in the above location request message.

207: The HLR determines the service MSCe-T of the called terminal, and sends a route request message (ROUTREQ) to the MSCe-T, which carries the SO information of the calling terminal.

208: MSCe-O sends a bearer update request (Bearer Update Request) message to BSC-O, requesting BSC-O to update the bearer mode. The message contains A2p parameters (the parameters include voice codec format information), MGW address information (such as IP address, port number) and so on.

209: MSCe-T obtains the service option information of the calling terminal carried in the above routing request message, and after assigning a temporary local number (Temporary Local Directory Number, TLDN) to the called terminal, returns the routing information routreq to the HLR.

210: The HLR returns a location request response message (locreq) to the MSCe-O.

211: BSC-O updates the bearer to IP bearer mode, sends a Bearer Update Response (Bearer Update Response) message to MSCe-O, the message contains A2p parameters (this parameter contains voice codec format information), and notifies MSCe-O of bearer update For IP mode.

212: MSCe-O starts to establish a relay-side bearer and sends an Add Request message to MGW-O while receiving the Bearer Update Response message from BSC-O.

213: After the MGW-O establishes the bearer, it returns an Add Reply message with local media information (including the local IP address and port number).

214: The MSCe-O converts the local media information into a Session Description Protocol (Session Description Protocol, SDP), and initiates an INVITE request carrying the SDP to the MSCe-T.

215: After receiving the INVITE request, the MSCe-T returns a 100 response indicating that the request message has been received and is being processed.

216: MSCe-T initiates paging to the called terminal, and MSCe-T sends a paging request message (Paging Request) to BSC-T.

217: After receiving the paging response from the called MS, the BSC-T returns a paging response message (Paging Response) to the MSCe-T. The paging response message carries the SO information of the called terminal, and does not need to carry the A2p parameter .

218: MSCe-T starts to establish a relay side bearer, and sends an Add Request message to MGW-T.

219: The MGW-T returns an Add Reply message with local media information (including the local IP address and port number). MSCe-T converts local media information into SDP.

220: MSCe-T initiates an assignment process, and sends an assignment request message AssignmentRequest to BSC-T to apply for air channel resources, and there is no A2p parameter in the message.

221: After the BSC-T successfully establishes the air channel, it returns an Assignment Complete message to the MSCe-T, and the message contains an A2p parameter (the parameter contains voice codec format information).

222: Then, the MSCe-T starts to establish the bearer on the access side, and sends an Add Request message to the MGW-T.

223: The MGW-T returns an Add Reply message, which contains the IP address assigned by the gateway.

224: MSCe-T sends a Bearer Update Request message to BSC-T, requesting BSC-T to update the bearer mode, and the message contains A2p parameters (this parameter contains voice codec format information), MGW address information (such as IP address, port number), etc.

225: The BSC-T updates the bearer to the IP bearer mode, sends a Bearer UpdateResponse message to the MSCe-T, and contains the A2p parameter (this parameter includes voice codec format information), and notifies the MSCe-T to update the bearer to the IP bearer mode.

226: The MSCe-T sends a Flash with Information message to the BSC-T to send the SO information of the calling terminal to the BSC-T.

227: MSCe-T sends a modify request (Modify Request) message to MGW-T, which carries the IP information of MSCe-O.

228: The MGW-T sends back a modify response (Modify Reply) message to the MSCe-T.

229: After BSC-T sends a Bearer Update Response message to MSCe-T, the called terminal rings, and MSCe-T sends a ringing (180) message to MSCe-O, which carries the SDP and SO information of the called terminal.

230: MSCe-O sends a Flash with Information message to BSC-O to send the SO information of the called terminal to BSC-O.

231: MSCe-O returns a provisional acknowledgment 180 (provisional ACK 180, PRACK for 180) message after receiving the 180 message.

232: MSCe-T sends a 200 for PRACK message to MSCe-O to confirm session establishment.

233: The MSCe-O parses out the SDP of the peer media information, and notifies the MGW-O through a Modify Request message.

234: The MGW-O sends a Modify Reply message back to the MSCe-O.

235: The MGW-O notifies the MSCe-O through a Notify Request (Notify Request) message after successfully establishing a bearer with the peer using the obtained peer media information.

236: MSCe-O returns a Notify Reply message after receiving the Notify Request message.

237: The MGW-T also notifies the MSCe-T through a Notify Request message after successfully establishing the bearer.

238: MSCe-T returns a Notify Reply message after receiving the Notify Request message.

239: After receiving the bearer establishment instruction, the MSCe-T instructs the MGW-T to play a ringback tone to the calling network side by sending a message Modify Request.

240: The MGW-T sends a Modify Reply message back to the MSCe-T.

241: After the called party picks up the phone, the called network side BSC-T reports a connection establishment message (CONNECT) to the MSCe-T.

242: MSCe-T sends a 200 for INVITE response message to MSCe-O.

243: At the same time, the MSCe-T sends a message Modify Request to instruct the MGW-T to stop playing the ring back tone to the calling network side.

244: After the MGW-T stops playing the sound, it returns a Modify Reply message to the MSCe-T.

245: MSCe-T sends a Modify Request message to MGW-T, indicating to activate the endpoint.

246: The MGW-T sends a Modify Reply message back to the MSCe-T.

247: After receiving the 200 for INVITE message, MSCe-O sends back the ACK for 200 message. At this time, the calling party and the called party enter the talking state.

After entering the conversation state above, the calling terminal receives the calling party’s voice compressed code stream on the air interface, and then transparently transmits it to the BSC on the called network side; the called terminal receives the called voice compressed code stream on the air interface, and transparently transmits it to the calling party It is called the BSC on the network side; the BSC executes the voice coding and decoding of the voice compression code stream transmitted from the peer end. It realizes IP-based on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

Embodiment 3, as shown in FIG. 3 , the embodiment of the present invention also provides a base station controller, including:

An information receiving unit 301, configured to receive the service option information of the calling terminal sent by the mobile services switching center on the called network side;

The voice stream receiving unit 302 is configured to receive the voice compressed code stream transparently transmitted by the calling network side, and the voice compressed code stream is sent to the calling network side by the calling terminal through the air interface;

The codec unit 303 is configured to perform voice codec on the voice compression code stream according to the service option information of the calling terminal.

Send the service option information of the local end to the BSC of the opposite end, and place the voice codec processing on the BSC; the BSC of the opposite end performs the voice codec processing, and the voice compressed code stream received by the air interface of the local end can be transparent in the core network Transmission; Realize the IP-based call on the CDMA network that needs to carry high security requirements, and achieve the purpose of saving bandwidth.

In order to realize the transparent transmission of the voice compression code stream on the called network side to the BSC on the calling network side, the correct encoding and decoding can be performed. Further, as shown in FIG. 4, the above-mentioned base station controller also includes:

The paging response unit 401 is configured to send a paging response message to the mobile service switching center on the called network side, where the paging response message carries service option information of the called terminal.

Embodiment 4, as shown in FIG. 5 , the implementation of the present invention also provides another base station controller, including:

A service option receiving unit 501, configured to receive the service option information of the called terminal sent by the mobile services switching center on the calling network side;

The voice code receiving unit 502 is used to receive the voice compressed code stream transparently transmitted by the called network side, and the voice compressed code stream is sent to the called network side by the called terminal through the air interface;

The voice codec unit 503 is configured to perform voice codec on the voice compressed code stream according to the service option information of the called terminal.

In the above implementation mode, the service option information of the local end is sent to the BSC of the opposite end, and the speech codec processing is placed on the BSC; the BSC of the opposite end executes the speech codec processing, and the speech compressed code stream received by the air interface of the local end can be processed on the BSC. Transparent transmission in the core network; it realizes IP on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

Embodiment 5, as shown in FIG. 6, the embodiment of the present invention also provides a mobile service switching center, including:

a routing message receiving unit 601, configured to receive a routing request message sent by a home location register;

The first service option acquiring unit 602 is configured to acquire the service option information of the calling terminal carried in the routing request message;

The first information sending unit 603 is further configured to send the service option information of the calling terminal to the base station controller on the called network side.

Further, as shown in FIG. 7, the above-mentioned mobile service switching center also includes:

A paging receiving unit 701, configured to receive a paging response message sent by a base station controller on the called network side;

The second service option acquiring unit 702 is further configured to acquire the service option information of the called terminal carried in the paging response message;

The second information sending unit 703 is further configured to send the service option information of the called terminal to the mobile service switching center on the calling network side.

In the above implementation mode, the service option information of the local end is sent to the BSC of the opposite end, so that the voice codec processing can be placed on the BSC conveniently; the BSC of the opposite end performs the voice codec processing, and the voice compressed code stream received by the air interface of the local end can be processed on the BSC. Transparent transmission in the core network; it realizes IP on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

Embodiment 6, as shown in FIG. 8 , the embodiment of the present invention also provides a mobile service switching center, including:

A service option information receiving unit 801, configured to receive a message carrying the service option information of the called terminal sent by the mobile services switching center on the called network side;

The service option information sending unit 802 is configured to send the service option information of the called terminal to the base station controller on the calling network side.

In the above implementation mode, the service option information of the local end is sent to the BSC of the opposite end, so that the voice codec processing can be placed on the BSC conveniently; the BSC of the opposite end performs the voice codec processing, and the voice compressed code stream received by the air interface of the local end can be processed on the BSC. Transparent transmission in the core network; it realizes IP on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

Embodiment 7, as shown in FIG. 9A , the embodiment of the present invention also provides a communication system, including:

The base station controller 901 on the called network side is used to receive the service option information of the calling terminal sent by the mobile service switching center 902 on the called network side; The stream is sent by the calling terminal to the calling network side through the air interface; according to the service option information of the calling terminal, the voice codec is performed on the voice compression code stream;

The mobile service switching center 902 on the called network side is used to receive the routing request message sent by the home location register; obtain the service option information of the calling terminal carried in the routing request message; send the service option information of the calling terminal to The base station controller on the called network side.

further,

Realize that the present invention has implemented the coding mode provided at the calling network side, specifically as follows:

The base station controller 901 on the called network side is further configured to send a paging response message to the mobile service switching center 902 on the called network side, where the paging response message carries service option information of the called terminal;

The mobile service switching center 902 on the called network side is further configured to receive the paging response message sent by the base station controller 901 on the called network side; obtain the service option information of the called terminal carried in the paging response message, and Send to the mobile service switching center 903 on the calling network side;

As shown in Figure 9B, the above system also includes:

The mobile service switching center 903 on the calling network side is used to receive the message carrying the service option information of the called terminal sent by the mobile service switching center 902 on the called network side; Call the base station controller 904 on the network side;

The base station controller 904 on the calling network side is used to receive the service option information of the called terminal sent by the mobile service switching center 903 on the calling network side; The stream is sent by the called terminal to the called network side through the air interface; the voice codec is performed on the voice compression code stream according to the service option information of the called terminal.

specifically,

Both the service option information of the calling terminal sent by the mobile services switching center 903 on the calling network side and the service option information of the called terminal sent by the mobile services switching center 902 on the called network side are carried in messages with information prompts;

The message carrying the service option information of the called terminal sent by the mobile service switching center 902 on the called network side is a ringing message.

Certainly, the above message carrying the service option information may be other, which does not affect the realization of the embodiment of the present invention, which is not limited by the embodiment of the present invention.

In the above implementation mode, the service option information of the local end is sent to the BSC of the opposite end, and the speech codec processing is placed on the BSC; the BSC of the opposite end executes the speech codec processing, and the speech compressed code stream received by the air interface of the local end can be processed on the BSC. Transparent transmission in the core network; it realizes IP on the calling CDMA network that needs to carry high confidentiality requirements, and achieves the purpose of saving bandwidth.

Those of ordinary skill in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the above-mentioned program can be stored in a computer-readable storage medium, and the above-mentioned storage medium can be Is read-only memory, disk or CD, etc.

The method, device, and system for notifying service option information and voice transmission provided by the embodiments of the present invention have been described above in detail. In this paper, specific examples are used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only It is used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification It should not be construed as a limitation of the invention.

Claims (10)

1. A method for voice transmission, characterized in that, comprising: receiving the service option information of the calling terminal sent by the mobile services switching center on the called network side; receiving the voice compressed code stream transparently transmitted from the calling network side, the voice compressed code stream being sent by the calling terminal to the calling network side through the air interface; Performing voice coding and decoding on the voice compressed code stream according to the service option information of the calling terminal. 2. method according to claim 1, is characterized in that, The service option information is carried by a message with an information prompt. 3. The method according to claim 1 or 2, further comprising: Sending a paging response message to the mobile service switching center on the called network side, where the paging response message carries service option information of the called terminal. 4. A method for voice transmission, characterized in that, comprising: receiving the service option information of the called terminal sent by the mobile service switching center on the calling network side; Receive the voice compressed code stream transparently transmitted by the called network side, and the voice compressed code stream is sent by the called terminal to the called network side through the air interface; performing speech encoding and decoding on the speech compression code stream according to the service option information of the called terminal. 5. A method of informing business option information, characterized in that it comprises: receiving the routing request message sent by the home location register; Obtaining the service option information of the calling terminal carried in the routing request message; Sending the service option information of the calling terminal to the base station controller on the called network side; receiving the paging response message sent by the base station controller on the called network side; Obtain the service option information of the called terminal carried in the paging response message, and send it to the mobile service switching center on the calling network side. 6. A base station controller, characterized in that, comprising: The information receiving unit is used to receive the service option information of the calling terminal sent by the mobile service switching center on the called network side; The voice stream receiving unit is used to receive the voice compressed code stream transparently transmitted by the calling network side, and the voice compressed code stream is sent to the calling network side by the calling terminal through the air interface; A codec unit, configured to perform voice codec on the voice compressed code stream according to the service option information of the calling terminal; The paging response unit is configured to send a paging response message to the mobile service switching center on the called network side, where the paging response message carries service option information of the called terminal. 7. A base station controller, characterized in that, comprising: The service option receiving unit is used to receive the service option information of the called terminal sent by the mobile service switching center on the calling network side; The voice code receiving unit is used to receive the voice compressed code stream transparently transmitted by the called network side, and the voice compressed code stream is sent to the called network side by the called terminal through the air interface; A voice codec unit, configured to perform voice codec on the voice compressed code stream according to the service option information of the called terminal. 8. A mobile service switching center, characterized in that it comprises: a routing message receiving unit, configured to receive a routing request message sent by the home location register; A first service option obtaining unit, configured to obtain service option information of the calling terminal carried in the routing request message; a first information sending unit, configured to send the service option information of the calling terminal to a base station controller on the called network side; a paging receiving unit, configured to receive a paging response message sent by a base station controller on the called network side; A second service option obtaining unit, configured to obtain service option information of the called terminal carried in the paging response message; The second information sending unit is configured to send the service option information of the called terminal to the mobile service switching center on the calling network side. 9. A communication system, characterized in that it comprises: The base station controller on the called network side is used to receive the service option information of the calling terminal sent by the mobile service switching center on the called network side; receive the voice compression code stream transparently transmitted by the calling network side, and the voice compression code stream Sending to the calling network side by the calling terminal through the air interface; performing voice encoding and decoding on the voice compression code stream according to the service option information of the calling terminal; The mobile service switching center on the called network side is used to receive the routing request message sent by the home location register; obtain the service option information of the calling terminal carried in the routing request message; send the service option information of the calling terminal To the base station controller on the called network side. 10. The system of claim 9, wherein: The base station controller on the called network side is further configured to send a paging response message to the mobile services switching center on the called network side, where the paging response message carries service option information of the called terminal; The mobile service switching center on the called network side is further configured to receive a paging response message sent by a base station controller on the called network side; acquire service option information of the called terminal carried in the paging response message, and sent to the mobile service switching center on the calling network side; The system also includes: The mobile service switching center on the calling network side is used to receive the message carrying the service option information of the called terminal sent by the mobile service switching center on the called network side; send the service option information of the called terminal to the calling party A base station controller on the network side; The base station controller on the calling network side is used to receive the service option information of the called terminal sent by the mobile service switching center on the calling network side; receive the voice compression code stream transparently transmitted by the called network side, and the voice compression code stream The called terminal sends it to the called network side through the air interface; performs voice encoding and decoding on the voice compression code stream according to the service option information of the called terminal.

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