WO2008141573A1 - Procédé de transmission de données et système de communication, contrôleur d'une station de base et passerelle multimédia - Google Patents

Procédé de transmission de données et système de communication, contrôleur d'une station de base et passerelle multimédia Download PDF

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Publication number
WO2008141573A1
WO2008141573A1 PCT/CN2008/070983 CN2008070983W WO2008141573A1 WO 2008141573 A1 WO2008141573 A1 WO 2008141573A1 CN 2008070983 W CN2008070983 W CN 2008070983W WO 2008141573 A1 WO2008141573 A1 WO 2008141573A1
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WIPO (PCT)
Prior art keywords
data
format
media gateway
real
base station
Prior art date
Application number
PCT/CN2008/070983
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English (en)
Chinese (zh)
Inventor
Shaohua Luo
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNA2007101661181A external-priority patent/CN101309205A/zh
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2008141573A1 publication Critical patent/WO2008141573A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Definitions

  • the present invention relates to the field of communications, and in particular, to a data transmission method, a communication system, a base station controller, and a media gateway.
  • the A interface is a 64Kbps Time Division Multiplex (TDM) time slot.
  • TDM Time Division Multiplex
  • the base station controller BSC, Base Station Controller
  • BTS Base Transceiver Station
  • TRAU cross-transformation and rate adaptation unit
  • 10 frames are RAA adapted to 80 bit V.110 frames.
  • the 80-bit V.l 10 frame rate adaptation 2 (RA2, Rate Adaptation 2) is adapted to 64 kbps and sent to the core network.
  • the BSC forwards the 64Kbps data to the Media Gateway (MGW, Media Gate Way), and the MGW hands over to the Interworking Function (IFF), and the IWF performs the Vl 10 and the wireless chain.
  • IFF Interworking Function
  • IWF performs the Vl 10 and the wireless chain.
  • the processing of the RLP/L2R Radio Link Protocol/Layer 2 Relay
  • PSTN Public Switched Telephone Network
  • the TDM method is used to transmit information between the BSC and the MGW, but with the number
  • RTP Real Time Transport Protocol
  • the prior art does not provide a solution for how to use RTP for data transmission under its network architecture.
  • the technical problem to be solved by the embodiments of the present invention is to provide a data transmission method, a communication system, a base station controller, and a media gateway, which can implement the A interface IP of the GSM system.
  • the data transmission method provided by the embodiment of the present invention includes: the media gateway receives the real-time transport protocol packet sent by the base station controller; the media gateway processes the packet to obtain data in the G.711 format; the media gateway uses the G. Data in the 711 format is sent to the interconnect function entity.
  • the data transmission method provided by the embodiment of the present invention includes: the base station controller performs rate adaptation processing on the data frame received from the mobile terminal to obtain data in the G.711 format; and the base station controller performs data in the G.711 format.
  • the real-time transport protocol packet is sent to the media gateway by the real-time transport protocol, and the media gateway is instructed to extract the corresponding data from the real-time transport protocol packet.
  • the communication system includes: a base station controller, configured to encapsulate a data frame received from a mobile terminal into a real-time transport protocol message and send the message; and a media gateway, configured to use the base station
  • the packet received by the controller is processed to obtain data in the G.711 format, and the data is sent.
  • the interconnection function entity is configured to receive the data in the G.711 format sent by the media gateway.
  • the base station controller provided by the embodiment of the present invention includes: a data frame receiving unit, configured to receive a data frame from the mobile terminal, and a data frame encapsulating unit, configured to adapt the data frame to a frame after V.110 of 80 bits.
  • the packet is a real-time transport protocol packet
  • the data frame sending unit is configured to send the real-time transport protocol packet encapsulated by the data frame encapsulating unit to the media gateway.
  • the base station controller provided by the embodiment of the present invention includes: a first receiving unit, configured to receive an assignment message sent by a mobile switching center, and a data frame sent by the mobile terminal; and a first data processing unit, configured to use, according to the assignment message Performing a rate adaptation process on the data frame to obtain data in the G.711 format, and encapsulating the data in the G.711 format into a real-time transport protocol message; and a first data sending unit, configured to use the real-time transport protocol The message is sent to the media gateway.
  • the base station controller provided by the embodiment of the present invention includes: a third data receiving unit, configured for mobile terminal a data frame sent by the terminal; a second data processing unit, configured to perform rate adaptation processing on the received data frame to obtain data in a format of G.711, and encapsulate the data in the G.711 format to obtain a real-time transmission protocol packet; And a second data sending unit, configured to send the real-time transport protocol message to the media gateway by using a real-time transport protocol.
  • the media gateway provided by the embodiment of the present invention includes: a data receiving unit, a data adapting unit, and a data forwarding unit; the data receiving unit is configured to receive a real-time transport protocol sent by the base station controller to report data in a format of G.711; The data forwarding unit is configured to forward the adapted data in the G.711 format to the interconnecting functional entity.
  • the media gateway provided by the embodiment of the present invention includes: a second data receiving unit, configured to receive a real-time transport protocol packet that is sent by the base station controller and includes G.711 format data; and a data extracting unit, configured to use the real-time transport protocol The data in the corresponding G.711 format is extracted from the message; the second data forwarding unit is configured to send the data in the G.711 format to the interconnected functional entity.
  • FIG. 1 is a schematic diagram of a data transmission network in the prior art
  • FIG. 2 is a general flowchart of an embodiment of a data transmission method according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a first embodiment of a data transmission method according to an embodiment of the present invention
  • FIG. 4 is a flowchart of a second embodiment of a data transmission method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a third embodiment of a data transmission method according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an embodiment of a communication system according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a first embodiment of a base station controller according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a second embodiment of a base station controller according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a third embodiment of a base station controller according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a first embodiment of a media gateway according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of a second embodiment of a media gateway according to an embodiment of the present invention.
  • the embodiments of the present invention provide a data transmission method, a communication system, a base station controller, and a media gateway, which are used to implement IP address of the A interface.
  • a TRAU frame is taken as an example of a data frame, and it is understood that the same It may be other similar data frames, where one TRAU frame contains 4 data frames.
  • the following describes the processing flow of the low-speed data service.
  • the so-called low-speed data service generally refers to the service with a transmission rate lower than 9.6 kbps.
  • the specific processing method for the high-speed data service will be described in the following embodiments.
  • the overall process of the data transmission method embodiment in the embodiment of the present invention includes:
  • the BSC encapsulates the received data frame into an RTP packet.
  • the BSC receives the data frame from the mobile terminal through the BTS, and encapsulates the received data frame.
  • the specific encapsulation process will be described in detail in the following embodiments.
  • the BSC sends the encapsulated RTP ⁇ message to the MGW.
  • the MGW adapts the data frame to the 64 kbps data in the G.711 format by rate adaptation.
  • the MGW adapts the rate of the data frame in the received RTP packet by the rate adaptation, that is, the code change (TC, Transcoder).
  • the rate adaptation that is, the code change (TC, Transcoder).
  • the MGW sends the adapted data in the G.711 format to the IWF for further processing.
  • the data frame in the RTP packet sent by the BSC is adapted to the data in the G.711 format and forwarded by the MGW, thereby saving the transmission resources of the BSC to the core network, thereby improving the data transmission efficiency.
  • a first embodiment of a data transmission method in an embodiment of the present invention includes:
  • the BSC encapsulates the received 72-bit V.110 format data frame into RTP >3 ⁇ 4 text.
  • the BSC receives the 72-bit V.110 format data frame sent by the mobile terminal through the BTS, and deletes the first four words in the data frame.
  • the current intermediate rate may be obtained before the encapsulation, where the value of the intermediate rate parameter is sent by the Mobile Switching Center Server (MSC Server) to the MGW.
  • MSC Server Mobile Switching Center Server
  • the intermediate rate is 16 kbps
  • the BSC encapsulates four 72-bit V.110 format data frames into one RTP message.
  • the intermediate rate is 8 kbps
  • two of the four 72-bit V.110 format data frames are all ones. Invalid
  • the BSC encapsulates the remaining 2 valid 72-bit V.110 format data frames into an RTP message.
  • the intermediate rate can also be distinguished, that is, regardless of the intermediate rate of 8 kbps or 16 kbps, the BSC encapsulates four V.110 format data frames into one RTP message.
  • the BSC sends the encapsulated RTP ⁇ message to the MGW.
  • the BSC sends the encapsulated RTP packet to the MGW through the A interface.
  • multiple redundant frames can be set in the RTP packet.
  • the description is as follows: In each RTP message, two data blocks are included. The first data block is the data block of the previous time (two or four V.110 frames), and the second data block is the data block of the current time (two or four V.110 frames). In this way, each message is redundantly sent to the previous data. Once the IP network has lost packets, the lost data can be recovered from subsequent packets.
  • the specific format is as follows:
  • the specific number of redundant frames, the payload type of the RTP packet (PT, Payload Type), and the PT of each data block can be determined according to the configuration on the BSC and the MGW. It can also be delivered by the MSC Server through the H.248 and BSSAP messages of the Mc interface.
  • the MGW adapts the 72-bit V.110 format data frame in the RTP text to the 80-bit V.110 format data frame.
  • the intermediate rate is 16 kbps, that is, there are four V.110 format data frames in the RTP message, the direct adaptation is performed. If the intermediate rate is 8 kbps, that is, the RTP report. If there are two data frames in the V.110 format, you need to insert two invalid data frames of all 1s, and then perform the adaptation operation.
  • the value of the intermediate rate parameter is sent by the MSC Server to the MGW.
  • the MGW can perform the necessary check operation after receiving the RTP message. If the check succeeds, the MGW will perform the adaptation. If the check fails, the RTP >3 ⁇ 4 file is discarded.
  • the specific check operation is:
  • the value range is
  • Method 1 Configure the BSC and the MGW to ensure that the data service PT types of the BSC and the MGW are the same.
  • Method 2 Configure the PT on the MSC to use the data service of the A interface. Then, the H.248 message of the Mc is sent to the MGW, and the PT is sent to the BSC by extending the BSSAP protocol. Therefore, the PT of the BSC and the MGW are kept consistent.
  • the check is considered to pass.
  • the MGW adapts the 80-bit V.110 format data frame to the G.711 format data by rate adaptation.
  • the MGW sends the adapted data in the G.711 format to the IWF for further processing.
  • the IWF processes the received data and returns it to the MGW.
  • the MGW adapts the data in the G.711 format processed by the IWF to the 80-bit V.110 format data frame, and then adapts to the 72-bit data frame.
  • a data frame of the V.110 format if the intermediate rate is 16 kbps, the four 72-bit V.110 format frames are encapsulated into RTP messages and sent to the called party base station controller; if the intermediate rate value is 8 kbps, Then, the two 72-bit V.110 format frames are encapsulated into real-time transport protocol packets and sent to the called party BSC.
  • the called BSC After the called BSC receives the data sent by the MGW, it judges that if the intermediate rate value is 16 kbps, the received RTP message is directly processed. If the intermediate rate is 8 kbps, the received RTP is first received. Two all-one "1" invalid 72-bit V.110 format frames are inserted into the message, and then 72-bit V.110 format frames are transmitted to the PSTN network or other mobile terminals according to the user's request.
  • a second embodiment of a data transmission method in an embodiment of the present invention includes:
  • the BSC adapts the received 72-bit V.110 format data frame to the 80-bit V.110 format data frame.
  • the BSC receives the 72-bit V.110 format data frame sent by the mobile terminal through the BTS, and
  • the current intermediate rate may be obtained before the encapsulation.
  • the value of the intermediate rate parameter is sent by the MSC Server to the MGW. If the intermediate rate is 16 kbps, the BSC will use four 80-bit V.110 formats. The data frame is encapsulated into an RTP message. If the intermediate rate is 8 kbps, Then, in the four 80-bit V.110 format data frames, two data frames are all ones, that is, invalid, and the BSC encapsulates the remaining two valid 80-bit V.110 format data frames into one RTP message.
  • the intermediate rate can also be separated, that is, regardless of the intermediate rate of 8 kbps or 16 kbps, the BSC encapsulates four V.110 format data frames into one RTP message.
  • the BSC sends the encapsulated RTP file to the MGW.
  • the BSC sends the encapsulated RTP packet to the MGW through the A interface.
  • multiple redundant frames can be set in the RTP packet.
  • the description is as follows: In each RTP message, two data blocks are included. The first data block is the data block of the previous time (2 or 4 V.110 frames), and the second data block is the data block of the current time (2 or 4 V.110 frames). In this way, each message is redundantly sent to the previous data. Once the IP network has lost packets, the lost data can be recovered from subsequent messages.
  • the specific number of redundant frames, the PT of the RTP message, and the PT of each data block can be determined according to the configuration on the BSC and the MGW. It can also be delivered by the MSC through the H.248 and BSSAP messages of the Mc interface.
  • the MGW adapts, by using rate adaptation, the 80-bit V.110 format data frame in the RTP packet to the G.711 format data.
  • the intermediate rate is 16 kbps, that is, there are four V.110 format data frames in the RTP message, the direct adaptation is performed. If the intermediate rate is 8 kbps, that is, the RTP report. If there are two data frames in the V.110 format, you need to insert two invalid data frames of all 1s, and then perform the adaptation operation.
  • the value of the intermediate rate parameter is sent by the MSC Server to the MGW.
  • the MGW can perform the necessary check operation after receiving the RTP message. If the check succeeds, the MGW will perform the adaptation. If the check fails, the RTP >3 ⁇ 4 file is discarded.
  • the specific check operation is:
  • the value range is
  • Method 1 Configure the BSC and the MGW to ensure that the data service PT types of the BSC and the MGW are the same.
  • Method 2 Configure the PT on the MSC to use the data service of the A interface.
  • Mc The H.248 message is sent to the MGW, and the PT is sent to the BSC by extending the BSSAP protocol. Therefore, the PT of the BSC and the MGW are kept consistent.
  • the check is considered to pass.
  • the MGW sends the adapted data in the G.711 format to the IWF for further processing.
  • the IWF processes the received data and returns it to the MGW.
  • the MGW adapts the data in the G.711 format processed by the IWF to the 80-bit V.110 format data frame, and then adapts to the 72-bit data frame.
  • a data frame of the V.110 format if the intermediate rate is 16 kbps, the four 72-bit V.110 format frames are encapsulated into RTP messages and sent to the called party base station controller; if the intermediate rate value is 8 kbps, Then, the two 72-bit V.110 format frames are encapsulated into real-time transport protocol packets and sent to the called party BSC.
  • the called BSC After the called BSC receives the data sent by the MGW, it judges that if the intermediate rate value is 16 kbps, the received RTP message is directly processed. If the intermediate rate is 8 kbps, the received RTP is first received. Two invalid "1" invalid 72-bit V.110 format frames are inserted into the message, and then the next processing is performed.
  • a third embodiment of a data transmission method in an embodiment of the present invention includes:
  • the BSC adapts the received 72-bit V.110 format data frame to the 63-bit V.110 format data frame.
  • the BSC receives the 72-bit V.110 format data frame sent by the mobile terminal through the BTS, and
  • 502. Encapsulate a data frame of a V.110 format of 63 bits into an RTP packet.
  • the current intermediate rate may be obtained before the encapsulation, where the value of the intermediate rate parameter is sent by the MSC Server to the MGW.
  • the intermediate rate is 16 kbps
  • the BSC will have four 63-bit V.110 formats.
  • the data frame is encapsulated into an RTP message.
  • the intermediate rate is 8 kbps
  • two of the four 63-bit V.110 format data frames are all ones, that is, invalid, and the BSC will have two valid 63 bits.
  • the data frame of the V.110 format is encapsulated into an RTP message.
  • the intermediate rate can also be distinguished, that is, regardless of the intermediate rate of 8 kbps or 16 kbps, the BSC encapsulates four V.110 format data frames into one RTP message. 503. The BSC sends the encapsulated RTP ⁇ message to the MGW.
  • the BSC sends the encapsulated RTP packet to the MGW through the A interface.
  • multiple redundant frames can be set in the RTP packet.
  • the description is as follows: In each RTP message, two data blocks are included. The first data block is the data block of the previous time (2 or 4 V.110 frames), and the second data block is the data block of the current time (2 or 4 V.110 frames). In this way, each message is redundantly sent to the previous data. Once the IP network has lost packets, the lost data can be recovered from subsequent messages.
  • the specific number of redundant frames, the PT of the RTP message, and the PT of each data block can be determined according to the configuration on the BSC and the MGW. It can also be delivered by the MSC through the H.248 and BSSAP messages of the Mc interface.
  • the MGW adapts the 63-bit V.110 format data frame in the RTP packet to the 80-bit V.110 format data frame by using rate adaptation.
  • the number of data frames needs to be determined. If the intermediate rate is 16 kbps, that is, there are four V.110 format data frames in the RTP message, the direct adaptation is performed. If the intermediate rate is 8 kbps, that is, in the RTP text. If there are two V.110 format data frames, you need to insert two invalid data frames that are all 1s, and then perform the adaptation operation.
  • the value of the intermediate rate parameter is sent by the MSC Server to the MGW.
  • the MGW can perform the necessary check operation after receiving the RTP message. If the check succeeds, the MGW will perform the adaptation. If the check fails, the RTP >3 ⁇ 4 file is discarded.
  • the specific check operation is:
  • the PT of the data service on the A interface is a dynamic PT, which ranges from 96 to 127. To ensure PT-saturation, the following methods are available:
  • Method 1 Configure the BSC and the MGW to ensure that the data service PT types of the BSC and the MGW are the same.
  • Method 2 Configure the PT on the MSC to use the data service of the A interface. Then, the H.248 message of the Mc is sent to the MGW, and the PT is delivered to the BSC by extending the BSSAP protocol. This ensures that the PTs of the BSC and the MGW are consistent.
  • the MGW adapts the data frame of the 80 bits V.110 format to the data of the G.711 format.
  • the MGW sends the adapted data in the G.711 format to the IWF for further processing.
  • the IWF processes the received data and returns it to the MGW.
  • the MGW adapts the data in the G.711 format processed by the IWF to the 80-bit V.110 format data frame, and then adapts to the 72-bit V-frame.
  • a data frame of the .110 format if the intermediate rate value is 16 kbps, encapsulates four 72-bit V.110 format frames into RTP messages and sends them to the called party base station controller; if the intermediate rate value is 8 kbps,
  • the two 72-bit V.110 format frames are encapsulated into real-time transport protocol packets and sent to the called party BSC.
  • the called BSC judges after receiving the data sent by the MGW, if the intermediate rate is
  • the next step is to directly process the received RTP message. If the intermediate rate is 8kbps, first insert two "1" invalid 72bits V.110 format into the received RTP message. Frame, then proceed to the next step.
  • an embodiment of a communication system in an embodiment of the present invention includes:
  • the mobile terminal 601 is configured to send a data frame.
  • the base transceiver station 602 is configured to receive a data frame sent by the mobile terminal and forward the data frame to the base station controller 603;
  • the base station controller 603 is configured to encapsulate the data frame received from the mobile terminal into a real-time transport protocol message and send the message;
  • the media gateway 604 is configured to adapt data frames in the message received from the base station controller 603 to data in the G.711 format by code conversion, and send the data;
  • the interconnect function entity 605 is configured to receive data transmitted by the media gateway 604.
  • the first embodiment of the base station controller in the embodiment of the present invention includes:
  • the data frame receiving unit 701 is configured to receive a data frame from the mobile terminal;
  • the data frame encapsulating unit 702 is configured to adapt the data frame to an 80-bit V.110 format frame, and transmit the protocol packet in real time;
  • the data frame sending unit 703 is configured to send the real-time transmission protocol packet encapsulated by the data frame encapsulating unit 702 to the media gateway.
  • the first embodiment of the media gateway in the embodiment of the present invention includes:
  • the data receiving unit 1001 is configured to receive a real-time transport protocol packet sent by the base station controller, and the data adapting unit 1002 is configured to adapt the frame in the V.110 format in the real-time transport protocol packet to the data in the G.711 format. ;
  • the data forwarding unit 1003 is configured to forward the adapted data in the G.711 format to the interconnect function entity.
  • the technical solution described in the above embodiments is a processing scheme of data services of 9.6 kbps or less and 9.6 kbps or less, and for high-speed data services (HSCSD, High Speed Circuit Switched Data) exceeding 9.6 kbps, the following two types can be used. Way to handle:
  • the high-speed data service and the low-speed data service are differentiated on the BSC side:
  • the specific implementation manner is:
  • the BSC obtains whether the data service is a high-speed data service or a low-speed data service according to a bearer control (BC) parameter in the MSC assignment message.
  • BC bearer control
  • the processing of the bearer plane uses the method described above.
  • the MSC sends an assignment message to the BSC, where the assignment message includes a BC parameter, which is used to indicate whether the current data service is a low-speed data service or a high-speed data service.
  • the BSC performs rate adaptation, and/or multi-channel multiplexing, and/or demultiplexing processing to obtain 64 kbps G.711 format Pulse Code Modulation (PCM) data.
  • PCM Pulse Code Modulation
  • the BSC only needs to complete the TDM to IP format conversion, that is, the BSC uses a fixed time interval (for example: 20ms) for RTP packing, and encapsulates the G.711 format PCM data into an IP packet transmission.
  • MGW Mobility Management Entity
  • the BSC needs to perform rate adaptation processing for adapting data in different rate formats to data in the G.711 format, and multi-channel multiplexing and multi-channel demultiplexing may be performed according to actual conditions. For example, if the mobile terminal transmits multiple data frames, the BSC is required to perform multi-channel multiplexing processing. At this time, the data sent by the BSC to the mobile terminal needs corresponding multi-channel demultiplexing processing to form multi-channel data. Send to mobile terminal.
  • the MGW obtains whether the data service is a high-speed data service or a low-speed data service according to the PLMN BC parameter delivered by the MSC. If it is a low-speed data service, the RAA/RA2 adaptation is performed according to the method described above to obtain the G.711 format data transmission to the IWF.
  • the MSC sends an endpoint operation message to the MGW, which may be a modification of the endpoint request message, or an endpoint request message, where the message carries a PLMN BC parameter, which is used to indicate that the current data service is low speed.
  • Data services are also high-speed data services.
  • the received data is discarded, and the error information is reported.
  • the MGW For high-speed data services, the MGW only needs to extract the payload from the RTP packet and transparently convert it to the G.711 PCM format for transmission to the IWF for processing.
  • the MGW may not determine whether the data service type sent by the MSC is consistent with the data service type corresponding to the data format received from the BSC, and performs high-speed or low-speed processing according to the data service type delivered by the MSC.
  • the BSC does not distinguish between the high-speed data service and the low-speed data service.
  • the A interface can be uniformly transmitted by using the PCM over IP.
  • the BSC performs rate adaptation, and/or multi-channel multiplexing, and/or demultiplexing processing on the data acquired by the A interface according to the A interface signaling indication, and obtains data in the G.711 format.
  • the BSC then performs RTP packing with a fixed time interval (for example, 20ms), and encapsulates the PCM data in the G.711 format into an IP packet and sends it to the MGW.
  • a fixed time interval for example, 20ms
  • the BSC needs to perform rate adaptation processing for adapting data in different rate formats to data in the G.711 format, and multi-channel multiplexing and multi-channel demultiplexing may be performed according to actual conditions. For example, if the mobile terminal transmits multiple data frames, the BSC is required to perform multi-channel multiplexing processing. At this time, the data sent by the BSC to the mobile terminal needs corresponding multi-channel solution. The multiplexing process is performed to form multiplexed data to be delivered to the mobile terminal.
  • the BSC performs corresponding rate adaptation processing on data of different data service types.
  • data of different rates may be adapted to data of G.711 format according to the foregoing method. The specific method is similar and will not be described here.
  • BSC will adapt the data to G.711 format data, and encapsulate it into an IP packet, which is sent to the MGW through RTP.
  • the MGW learns that the call is a data service call, and the MGW extracts the data payload from the RTP packet (the rate of the payload data is 64 kbps) and converts the PCM stream converted into the TDM to the IWF for processing. This conversion process only completes the IP to TDM format conversion without the need for codec conversion and rate adjustment processing.
  • the data received by the MGW is data in the G.711 format, and does not need to consider data of a high-speed data service type or a low-speed data service type, directly extracts the data payload, and converts to a TDM format, and Send to IWF.
  • the data in the G.711 format described in the embodiment of the present invention may not be subjected to transcoding and EC conversion, and the data rate of the G.711 format may be 64 kbps.
  • the 64 kbps described in the above embodiments refers to the amount of data transmitted per second, and there are usually 50 messages per second, and the net sizes included in the 50 messages add up to 64 Kb.
  • the communication system in the embodiment of the present invention includes:
  • a mobile terminal 601 configured to send a data frame
  • the base station controller 602 is configured to encapsulate the data frame received from the mobile terminal 601 into a real-time transmission protocol message and send the message to the media gateway 603;
  • the media gateway 603 is configured to process the packet to obtain data in the G.711 format, and exchange the data to the interconnect function entity 604 by time division multiplexing.
  • the interconnection function entity 604 is configured to receive data sent by the media gateway.
  • the second embodiment of the communication system in the embodiment of the present invention includes: a mobile terminal 601, configured to send a data frame;
  • the base transceiver station 602 is configured to receive a data frame sent by the mobile terminal and forward the data frame to the base station controller 603.
  • the base station controller 603 is configured to receive an assignment message sent by the mobile switching center and a data frame sent by the base transceiver station 602, and determine, according to the assignment message, whether the current data service is a high-speed data service, and if yes, perform a rate on the data frame.
  • the data in the G.711 format is obtained by the matching and/or multi-channel multiplexing and/or the multi-channel demultiplexing process, and the data in the G.711 format is encapsulated into a real-time transmission protocol message, such as an IP packet, and the real-time transmission protocol is used.
  • the real-time transport protocol message is sent to the media gateway 604;
  • the media gateway 604 is configured to extract corresponding data from the real-time transport protocol message, perform time division multiplexing processing on the data, and send the processed data to the interconnect function entity 605;
  • the interconnect function entity 605 is configured to receive data sent by the media gateway 604.
  • the base station controller 603 needs to perform rate adaptation processing for adapting data in different rate formats to data in the G.711 format, and multi-channel multiplexing and multi-channel demultiplexing may be selected according to actual conditions. For example, if the mobile terminal 601 transmits multiple data frames, the base station controller 603 is required to perform multi-channel multiplexing processing. At this time, the data sent by the base station controller 603 to the mobile terminal 601 needs to be multi-channel demultiplexed. The multiplexed data is sent to the mobile terminal 601.
  • the base station controller 603 needs to determine whether the current service is a high-speed data service or a low-speed data service. If the high-speed data service is a high-speed data service, the base station controller 603 performs the above-mentioned manner. If the data is a low-speed data service, the low-speed data mentioned in the previous embodiment is used. The business processing method is processed.
  • the RTP packet in this embodiment may be an IP packet or other types of data packets, as long as the RTP protocol can be satisfied.
  • the third embodiment of the communication system in the embodiment of the present invention includes:
  • a mobile terminal 601 configured to send a data frame
  • the base transceiver station 602 is configured to receive a data frame sent by the mobile terminal and forward the data frame to the base station controller 603.
  • the base station controller 603 is configured to perform rate adaptation and/or multi-channel multiplexing and/or multi-channel demultiplexing processing on the data frames received from the base transceiver station 602 to obtain data in the G.711 format, for G.711.
  • Grid The data is encapsulated to obtain a real-time transport protocol message, and the real-time transport protocol message is sent to the media gateway 604 through a real-time transport protocol;
  • the media gateway 604 is configured to extract corresponding data from the real-time transport protocol message, perform time division multiplexing processing on the data, and send the processed data to the interconnect function entity 605;
  • the interconnect function entity 605 is configured to receive data sent by the media gateway 604.
  • the base station controller 603 needs to perform rate adaptation processing for adapting data in different rate formats to data in the G.711 format, and multi-channel multiplexing and multi-channel demultiplexing may be selected according to actual conditions. For example, if the mobile terminal 601 transmits multiple data frames, the base station controller 603 is required to perform multi-channel multiplexing processing. At this time, the data sent by the base station controller 603 to the mobile terminal 601 needs to be multi-channel demultiplexed. The multiplexed data is sent to the mobile terminal 601.
  • the base station controller 603 does not need to determine whether the current service is a high-speed data service or a low-speed data service, and directly adapts the data frame to the data in the G.711 format for further processing.
  • the first embodiment of the present invention includes: a first receiving unit 801, which receives an assignment message sent by a mobile switching center and a data frame sent by the mobile terminal;
  • a data service check unit 802 configured to determine, according to the assignment message, whether the current data service is a high-speed data service
  • the first data processing unit 803 is configured to perform rate adaptation and/or multi-channel multiplexing and/or multi-channel demultiplexing processing on the data frame to obtain data in a G.711 format when the current data service is a high-speed data service. Encapsulating the data in the G.711 format into a real-time transport protocol message;
  • the first data sending unit 804 is configured to send the real-time transport protocol message to the media gateway by using a real-time transport protocol.
  • the third embodiment of the base station controller in the embodiment of the present invention includes:
  • a third data receiving unit 901 configured to receive a data frame sent by the mobile terminal
  • a second data processing unit 902 configured to perform rate adaptation and/or multi-channel multiplexing and/or multi-channel demultiplexing processing on the received data frame to obtain data in a G.711 format, in the G.711 format.
  • Data is encapsulated to obtain a real-time transport protocol message;
  • the second data sending unit 903 is configured to send the real-time transport protocol message to the media gateway by using a real-time transport protocol.
  • the second embodiment of the media gateway in the embodiment of the present invention includes: a second data receiving unit 1101, configured to receive a real-time transport protocol packet that is sent by the base station controller and includes G.711 format data;
  • the data extracting unit 1102 is configured to extract corresponding data in the G.711 format from the real-time transport protocol packet.
  • a second data adaptation unit 1103, configured to perform time division multiplexing processing on the data in the G.711 format
  • the second data forwarding unit 1104 is configured to send the processed data to the interconnected functional entity.
  • the media gateway embodiment described above can be applied to the case of not distinguishing between the high-speed data service and the low-speed data service. It can be understood that if the high-speed data service and the low-speed data service need to be distinguished, the media gateway also needs to include:
  • the service processing unit 1105 is configured to determine, according to the endpoint operation request received from the mobile switching center when the call is established, whether the current data service is a high-speed data service, and if yes, perform the step of extracting corresponding data from the real-time transport protocol message. .
  • the specific processing flow is: the second data receiving unit 1101 receives the IP packet, and the service processing unit 1105 determines the current data service type according to the endpoint operation request sent by the mobile switching center, and according to Different data service types extract corresponding data from the IP packet and send it to the second data adaptation unit 1103 for subsequent processing.
  • the media gateway receives the real-time transport protocol packet sent by the base station controller
  • the media gateway processes the packet to obtain 64 kbps data in G.711 format; the media gateway sends the data in the G.711 format to the interconnect function entity.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the embodiments of the present invention have the following advantages:
  • the MTC can receive the RTP packet sent by the BSC, so that the RPC-based data can be transmitted between the BSC and the MGW, so that the IP of the A interface can be implemented to meet the network development needs and improve the data transmission efficiency.
  • the MGW can adapt the data frame in the RTP message sent by the BSC to the 64 kbps G.711 format data and forward it, the data rate in the RTP message sent by the BSC to the MGW can be lower than 64 kbps, so Save BSC to the core network transmission resources.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission de données et un système de communication, un contrôleur d'une station de base et une passerelle multimédia. Le procédé de transmission de données comprend : la passerelle multimédia qui reçoit un paquet RTP envoyé par le contrôleur d'une station de base ; la passerelle multimédia qui traite le paquet pour obtenir les données dans un format G.711 de 64 kbps ; la passerelle multimédia qui envoie les données dans un format G.711 à une fonction d'interfonctionnement.
PCT/CN2008/070983 2007-05-18 2008-05-16 Procédé de transmission de données et système de communication, contrôleur d'une station de base et passerelle multimédia WO2008141573A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200710107966.5 2007-05-18
CN200710107966 2007-05-18
CN200710166118.1 2007-11-07
CNA2007101661181A CN101309205A (zh) 2007-05-18 2007-11-07 一种数据传输方法及通信系统及基站控制器以及媒体网关

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6788651B1 (en) * 1999-04-21 2004-09-07 Mindspeed Technologies, Inc. Methods and apparatus for data communications on packet networks
EP1902558A1 (fr) * 2005-07-12 2008-03-26 Samsung Electronics Co., Ltd. Procede et systeme de fourniture de service de diffusion de donnees ip dans un systeme de diffusion audionumerique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6788651B1 (en) * 1999-04-21 2004-09-07 Mindspeed Technologies, Inc. Methods and apparatus for data communications on packet networks
EP1902558A1 (fr) * 2005-07-12 2008-03-26 Samsung Electronics Co., Ltd. Procede et systeme de fourniture de service de diffusion de donnees ip dans un systeme de diffusion audionumerique

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