CN101351028B - Method and apparatus for down discontinuousness voice transmission base on IP Abis interface - Google Patents
Method and apparatus for down discontinuousness voice transmission base on IP Abis interface Download PDFInfo
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Abstract
The invention discloses a method for transmitting downlink discontinuous voice based on IP Abis interface and a device thereof. The method comprises the following steps: a base station controller of the IP Abis interface sends voice frames to a base transceiver station according to the scheduled first period during the voice activation period and sends comfort noise frames to the base transceiver station according to the scheduled second period during the voice non-activation period; by means of the mode of supplementing comfort noise frame duplicates, the base transceiver station can restore the comfort noise received according to the second period to the comfort noise sequence with the first period and carry out rate adaptation operation with the voice frames received according to the first period. By using the method, BSC no longer sends excessive comfort noise frames to BTS, thus saving the network resources of the IP Abis interface.
Description
Technical field
The present invention relates to voice transmission technology, particularly relate to a kind of method and apparatus that transmits based on the down discontinuousness voice of IPAbis interface.
Background technology
Global system for mobile communications (GSM, Global System for Mobile Communications) be most popular a kind of communication system in the mobile communication, its equipment for radio access network is commonly referred to base station sub-system (BSS, Base Station System).The effect that BSS plays in GSM is: on the one hand, BSS links to each other by the same portable terminal of wireless network (MS, Mobile Station), carries out transmission, reception and the RRM of wireless signal; On the other hand, BSS and the (MSC of mobile switching centre, Mobile SwitchingCenter) or Mobile Switching Center Server (MSC Server, Mobile Switching Center Server) links to each other, realize functions such as communicating to connect between the MS or between MS and the fixed network users, transfer system information and user profile.
As shown in Figure 1, typical B SS comprises two logical nodes: base station controller (BSC, Base StationController) 1 and base transceiver station (BTS, Base Transceiver Station) 2.Communication interface between BSC1 and the BTS2 is called Abis interface, is used to realize that the far-end between BSC1 and the BTS2 interconnects.Generally, Abis interface adopts the 2.048Mbps of standard or pulse code modulation (PCM, the PulseCode Modulation) digital transmission link of 64Kbps to realize transfer of data, carry voice traffic channel on it.The frame structure that transmits in the Abis interface meets the structure of code conversion and Rate Adapter Unit (TRAU, Transcoding andRate Adaptation Unit) frame.
For a voice traffic channel, transmit the speech business frame of a trau frame structure between BSC1 and the BTS2 every 20ms, this speech business frame comprises 320bit or 160bit data, correspond respectively to full rate speech traffic channel and half-rate speech Traffic Channel, the transmission rate that is to say this voice traffic channel is 16Kbps or 8Kbps.Wherein, according to the difference of code rate, the speech business frame comprises full rate (FR, Full Rate) speech business frame, enhanced full rate (EFR, Enhanced Full Rate) speech business frame, half rate (HR, Half Rate) speech business frame etc.
Communication interface between BSC1 and the MSC3 is called the A interface, and data code flow is the pcm encoder signal of the G.711 form of 64Kbit/s in the A interface, and is all different with voice traffic channel speed and coded system in the Abis interface.So increased TRAU in BSC1 one side, TRAU can be the pcm encoder conversion of signals from the A interface coded voice signal of voice traffic channel in the Abis interface, and makes corresponding rate adapted; Perhaps, conversely the coded voice signal of voice traffic channel in the Abis interface is converted to pcm encoder signal in the A interface, and makes corresponding rate adapted.
Through the wireless network transmissions voice, its communication interface is called Um Interface between BTS2 and the MS4.Voice transfer in the communication has dual mode: a kind of is no matter the user whether in speech, all carries out continuous coding and transmission to voice signal; Another kind is discontinuous transmission (DTX, Discontinuous Transmis-sion).In descending DTX voice transfer link, in the voice activation phase, the every 20ms of BSC is to the speech business frame of a trau frame structure of BTS transmission, and the speech business frame of this moment has carried voice signal, is called speech frame; And at the non-active period of voice, the every 20ms of BSC is to the speech business frame of a trau frame structure of BTS transmission, and what the speech business frame of this moment carried is the comfort noise characterisitic parameter, is called the comfort noise frame.BSC sends in the speech business frame of BTS, is speech frame or comfort noise frame by this speech business frame of a SP bit identification.Particularly, it is speech frame that SP=1 identifies this frame, is the comfort noise frame and SP=0 identifies this frame.BTS has received after speech frame and the comfort noise frame, through rate adapted and coded modulation, obtain speech frame and comfort noise frame after the coded modulation, the speech frame after whole coded modulation is sent to MS, every the comfort noise frame of 480ms after MS sends a coded modulation.Adopt the DTX mode can reduce aerial total interference level, improve system effectiveness, also can reduce the power consumption of radio receiving-transmitting unit simultaneously, this advantage is particularly evident for portable terminal.The concrete handling process of DTX voice transfer of FR, EFR and HR business sees also 3GPP TS46.031,3GPP TS46.081 and 3GPP TS46.041, is not described in detail in this.
As shown in Figure 2, the phonetic code type converting unit 101 and the downstream rate adaptation unit 102 that comprise the BSC side in the prior art based on the descending DTX speech transmission device of Abis interface, and the downstream rate adaptation unit 206 of BTS side, DTX control unit 207 and coded modulation unit 208.Wherein, phonetic code type converting unit 101 is used for producing new compressed voice coding according to the pcm encoder signal that comes from the transmission of A interface, and generation corresponding D TX Control Parameter, wherein, the compressed voice coding comprises voice messaging or comfort noise characterisitic parameter information, and it is the parameter of speech frame or comfort noise frame that the DTX Control Parameter comprises the difference present frame; Downstream rate adaptation unit 102 is according to the speech business frame of different type of service generation trau frame structures, and this speech business frame comprises speech frame and comfort noise frame, and the SP bit of trau frame is set according to the type of speech business frame; And the downstream rate adaptation unit 206 of BTS side is used to finish the parsing of speech business frame, obtains information bit and DTX Control Parameter, and this DTX Control Parameter comprises the SP bit; The coding and the modulation of BTS one side speech business frame finished in coded modulation unit 208; DTX control unit 207 is controlled BTS every the comfort noise frame of 480ms after MS sends a coded modulation, the speech frame after 20ms sends a coded modulation according to the DTX Control Parameter.
Down link as shown in Figure 3, the voice activation phase, the every 20ms of BSC sends a speech frame to BTS, speech frame is designated the rectangular block that is filled with grid in Fig. 3; At the non-active period of voice, the every 20ms of BSC sends a comfort noise frame to BTS, the comfort noise frame is designated packless rectangular block in Fig. 3, and BTS has only the just comfort noise frame after MS sends a coded modulation of every process 480ms, and all the other comfort noise frames can be abandoned by BTS.When Abis interface is used for descending DTX voice transfer like this, transmit a large amount of unnecessary comfort noise frames, caused the waste of resource.For traditional fixed-bandwidth based on for the Abis interface of PCM transmission link, the waste of this resource can't be remedied.
Recently along with Softswitch technology is introduced core net, IP-based switching network framework forms gradually.Wherein, based on the Abis interface of IP transmission means, have higher efficiency of transmission and flexibility with respect to traditional Abis interface based on PCM transmission link.The Abis interface of IP-based transmission means abbreviates the IPAbis interface as, based on the BSS structure of IP Abis interface and external interface as shown in Figure 4, the both sides that the IP Abis interface connects are still BTS and BSC, and the A interface can be based on the IP transmission means at this moment, also can be based on original Circuit-switched pcm encoder transmission means.In order to adapt to traditional circuit exchange mode, BSC inside has still kept TRAU.For the IP Abis interface, the bandwidth of each voice traffic channel no longer is restricted to the full rate speech traffic channel of 16Kbit/S or the half-rate speech Traffic Channel of 8Kbit/S, if so continue to adopt original transmission means, send the comfort noise frame by BSC continuously to BTS, will cause the unnecessary waste of Internet resources.Analyze according to statistics, have the time of 60%-70% to be in the non-active period of voice in the communication process, that is to say, in the DTX down link, have only about half of bandwidth to be used to transmit unnecessary comfort noise frame, this situation is a kind of tangible wasting of resources for IP-based Abis interface.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of the descending DTX voice transfer based on the IP Abis interface, can solve BSC in the prior art to the BTS unnecessary comfort noise frame of transmission and cause the problem of the wasting of resources continuously, reach the purpose of conserve network resources.
Another object of the present invention is to provide a kind of device of the descending DTX voice transfer based on the IP Abis interface, can be used in the abandoning and recover of unnecessary comfort noise frame, and then reach the purpose of conserve network resources.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of transmitting based on the down discontinuousness voice of IP Abis interface, this method may further comprise the steps: send speech frame to BTS in the voice activation phase by the predetermined period 1 based on the BSC of IPAbis interface, at the non-active period of voice according to sending the comfort noise frame to BTS predetermined second round; BTS will be by the comfort noise frame of receiving second round, by the mode cycle of recovering of replenishing comfort noise frame copy be the comfort noise frame sequence of period 1, carry out the rate adapted operation with the speech frame of receiving by the period 1.
Wherein, the described period 1 is 20ms, and be 480ms second round.
Wherein, BSC sends before the step of speech business frame, and this method further comprises:
Whether the speech coding of judging the voice traffic channel that pcm encoder signal that the A interface transmitted and IP Abis interface are transmitted adopts different coded systems, if then the BSC of the IP Abis interface pcm encoder signal that transmission comes according to the A interface produces new compressed voice coding and DTX Control Parameter; Otherwise BSC directly carries out forwarding step to the speech business frame of receiving from the A interface;
Accordingly, BSC generates the speech business frame according to the compressed voice coding and the DTX Control Parameter that produce.
Wherein, the constructor of described speech business frame is compiled in collaboration with the structure of sign indicating number conversion and Rate Adapter Unit frame or is met the frame structure that RFC3551 limits.
The method of transmitting based on the down discontinuousness voice of IP Abis interface of the present invention comprises that further step: BTS finishes the parsing to speech frame and comfort noise frame, obtains information bit and DTX Control Parameter; BTS carries out coded modulation to information bit, obtains speech frame and comfort noise frame after the coded modulation, and according to the DTX Control Parameter, control sends speech frame after the coded modulation and comfort noise frame to MS.
In the method for the down discontinuousness voice transmission based on the IPAbis interface of the present invention, described recovering step further comprises: in the voice activation phase, BTS receives speech frame according to the period 1 and carries out rate adapted, if the time period BTS of period 1 length can not receive new speech frame at interval, then mend the empty frame of a frame and carry out rate adapted.
A kind of device that transmits based on the down discontinuousness voice of IP Abis interface, comprise downstream rate adaptation unit, frame sending controling unit, the frame detecting unit of phonetic code type converting unit, BSC, downstream rate adaptation unit, coded modulation unit and the DTX control unit of BTS, wherein
Phonetic code type converting unit is used for the pcm encoder signal that transmission comes according to the A interface and produces new compressed voice coding and DTX Control Parameter;
The downstream rate adaptation unit of BSC side, the compressed voice coding and the DTX Control Parameter that are used to utilize phonetic code type converting unit to produce generate the speech business frame, and the speech business frame is sent to the frame sending controling unit;
The frame sending controling unit is used for sending a speech frame to BTS in the voice activation phase by predetermined period 1, at the non-active period of voice according to sending a comfort noise frame predetermined second round to BTS;
The frame detecting unit, be used for sending the downstream rate adaptation unit of speech frame to the BTS side by the period 1, and utilize the mode of replenishing comfort noise frame copy, will send to the downstream rate adaptation unit of BTS side according to the period 1 by the comfort noise frame of receiving second round;
The downstream rate adaptation unit of BTS side is used to finish the parsing to the speech business frame, obtains information bit and DTX Control Parameter;
The coded modulation unit is used to finish the information bit coding and the modulation of BTS side, obtains speech frame and comfort noise frame after the coded modulation;
The DTX control unit is used for the Control Parameter according to DTX, and control BTS is by the comfort noise frame of second round after MS sends coded modulation, by the speech frame after the period 1 transmission coded modulation.
Wherein, described device also comprises: the speech frame retransmission unit of BSC side, will carry out yard speech business frame of type conversion from next not the needing of A interface transmission and send to the frame sending controling unit.
A kind of BSC that transmits based on the down discontinuousness voice of IPAbis interface comprises phonetic code type converting unit, downstream rate adaptation unit and frame sending controling unit, wherein,
Phonetic code type converting unit is used for the pcm encoder signal that transmission comes according to the A interface and produces new compressed voice coding and DTX Control Parameter;
The downstream rate adaptation unit, the compressed voice coding and the DTX parameter that are used to utilize phonetic code type converting unit to produce generate the speech business frame, and the speech business frame is sent to the frame sending controling unit;
The frame sending controling unit is used for sending a speech frame to BTS in the voice activation phase by predetermined period 1, at the non-active period of voice according to sending a comfort noise frame predetermined second round to BTS.
Wherein, described BSC also comprises: the speech frame retransmission unit is used for sending to the frame sending controling unit with carrying out yard speech business frame of type conversion from next not the needing of A interface transmission.
A kind of BTS that transmits based on the down discontinuousness voice of IP Abis interface, described BTS comprises: frame detecting unit, downstream rate adaptation unit, coded modulation unit and DTX control unit, wherein,
The frame detecting unit, be used for sending speech frame to the downstream rate adaptation unit by the period 1 in the voice activation phase, and utilize the mode of replenishing comfort noise frame copy, will send to the downstream rate adaptation unit by the comfort noise frame of receiving second round according to the period 1 at the non-active period of voice;
The downstream rate adaptation unit is used to finish the parsing to the speech business frame, obtains information bit and DTX Control Parameter;
The coded modulation unit is used to finish the information bit coding and the modulation of BTS side, obtains speech frame and comfort noise frame after the coded modulation;
The DTX control unit is used for the Control Parameter according to DTX, and control BTS presses the comfort noise frame of second round after MS sends coded modulation at the non-active period of voice, the speech frame after the voice activation phase sends coded modulation by the period 1.
The present invention is based on the descending DTX voice transmission method of IPAbis interface, can reduce the transmission of unnecessary comfort noise frame in the descending DTX voice transfer of the IPAbis interface link, under the situation that does not influence voice quality, can significantly reduce taking of transmission bandwidth, therefore can conserve network resources, and then can effectively reduce the transmission cost of IP Abis interface.And the inventive method does not limit the frame structure of IP Abis interface downlink transfer, and the frame structure that the trau frame that transmits in the compatible original Abis interface of energy and other type comprise speech payload is widely applicable.
In addition, the descending DTX speech transmission device that the present invention is based on the IP Abis interface is on the basis of existing descending DTX speech transmission device, increased the frame sending controling unit and the frame detecting unit forms, this framework can be when reducing transmission bandwidth, keep original descending DTX speech transmission device framework as far as possible, make things convenient for system upgrade and transformation.
Description of drawings
Fig. 1 is BSS structure and an interface schematic diagram in the prior art;
Fig. 2 is based on the schematic diagram of the descending DTX speech transmission device of Abis interface in the prior art;
Fig. 3 is based on the schematic diagram of the descending DTX voice transmission method of Abis interface in the prior art;
Fig. 4 among the present invention based on the BSS structure and the interface schematic diagram of IP Abis interface;
Fig. 5 among the present invention based on the high-level schematic functional block diagram of the descending DTX speech transmission device of IP Abis interface;
Fig. 6 among the present invention based on the flow chart of the descending DTX voice transmission method of IPAbis interface;
Fig. 7 is based on the state exchange schematic diagram in the descending DTX voice transfer process of IP Abis interface among the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Core concept of the present invention is: the BSC based on the IP Abis interface abandons unnecessary comfort noise frame, prolongs the cycle of BSC to BTS transmission comfort noise frame, and the BTS side recovers the comfort noise frame sequence by original cycle simultaneously.
In order to realize the present invention is based on the descending DTX voice transmission method of IP Abis interface, the present invention adopts the descending DTX speech transmission device based on the IP Abis interface as shown in Figure 5, in this device, BSC one side has increased frame sending controling unit 103 and speech frame retransmission unit 104 with respect to prior art; And increased frame detecting unit 205 with respect to prior art in BTS one side, wherein,
101 effects of phonetic code type converting unit are the same with prior art, be used for the pcm encoder signal that transmission comes according to the A interface and produce new compressed voice coding and DTX Control Parameter, wherein, the compressed voice coding comprises voice messaging or comfort noise characterisitic parameter information, and it is the parameter of speech frame or comfort noise frame that the DTX Control Parameter comprises the difference present frame;
Downstream rate adaptation unit 102, the compressed voice coding and the DTX Control Parameter that are used to utilize phonetic code type converting unit 101 to produce generate the speech business frame, and the speech business frame sent to the frame sending controling unit, from frame structure, the speech business frame that transmits in the IP Abis interface no longer is limited to the trau frame structure, particularly, the structure of this speech business frame can be the trau frame structure, it also can be other frame structure that comprises speech payload, the frame structure that RFC3551 limited for example, here, described speech business frame comprises speech frame and comfort noise frame;
Frame sending controling unit 103 is used for controlling respectively the transmission of speech frame and comfort noise frame, and in the voice activation phase, control BSC sends speech frame to BTS according to the period 1; At the non-active period of voice, control BSC according to second round the comfort noise frame give BTS, the comfort noise frame that the downstream rate adaptation unit 102 of all the other time BSC is generated all abandons, period 1 can be identical with the value in the descending DTX voice transmission method in the prior art with second round herein, be respectively 20ms and 480ms, also can adapt to other business demand and improvements over the prior art, be the time period of other length;
The effect of speech frame retransmission unit 104 is: will carry out yard speech business frame of type conversion from next not the needing of A interface transmission and send to frame sending controling unit 103, this situation is generally the A interface when also being based on the IP transmission means, and the speech coding of the voice traffic channel that data code flow that is transmitted from the A interface and IP Abis interface are transmitted adopts under the situation of same coded system;
Downstream rate adaptation unit 206, be used to finish the parsing of speech business frame, obtain information bit and DTX Control Parameter, wherein, voice messaging or comfort noise characterisitic parameter information have been comprised in the information bit, the DTX Control Parameter can be the SP bit in the descending trau frame, or other comprises the frame structure of speech payload, and for example the sign speech frame still is the parameter of comfort noise frame in the frame structure that RFC3551 limited;
The information bit coding and the modulation of BTS one side are finished in coded modulation unit 208, obtain speech frame and comfort noise frame after the coded modulation;
Utilization is based on the descending DTX speech transmission device of IP Abis interface, based on the descending DTX voice transmission method of IP Abis interface as shown in Figure 6, may further comprise the steps among the present invention:
Step 301: whether the speech coding of judging the voice traffic channel that pcm encoder signal that the A interface is transmitted and IP Abis interface are transmitted adopts same coded system, need to determine whether BSC to carry out a yard type conversion thus, if coded system is identical, the data code flow that explanation receives from the A interface is the speech business frame, do not need to carry out a yard type conversion, then the BSC speech business frame that directly will receive from the A interface is sent to the frame sending controling unit, execution in step 304; If coded system difference, explanation need be carried out a yard type conversion, then execution in step 302.
Step 302:BSC carries out a yard type conversion, generates new compressed voice coding and DTX Control Parameter.
The BSC pcm encoder signal that transmission comes according to the A interface produces new compressed voice coding and DTX Control Parameter, wherein, the compressed voice coding comprises voice messaging or comfort noise characterisitic parameter information, and it is the parameter of speech frame or comfort noise frame that the DTX Control Parameter comprises the difference present frame.
Step 303: compressed voice coding and DTX Control Parameter according to producing generate the speech business frame.
Here, the speech business frame that is generated can be with prior art in the speech business frame that transmits in the Abis interface have the trau frame of same structure, also can be other frame structure that comprises speech payload, for example frame structure that RFC3551 limited.The current speech business is in voice activation during the phase, and the speech business frame of generation is a speech frame; When being in the non-active period of voice, the speech business frame of generation is the comfort noise frame.For descending trau frame, it is that speech frame still is the comfort noise frame that the SP parameter in the trau frame can identify this frame; For the frame structure that RFC3551 limited, also can include the parameter of sign speech frame or comfort noise frame.
Step 304: carry out frame and send control.
Be exactly specifically: according to the DTX Control Parameter, judge that it still is the non-active periods of voice that the speech business of transmission at present is in the voice activation phase,, then send a speech frame to base transceiver station by the predetermined period 1 if in the voice activation phase; If at the non-active period of voice, then according to sending a comfort noise frame predetermined second round to base transceiver station.Wherein, the period 1 can be identical with the value in the descending DTX voice transmission method in the prior art with second round, is respectively 20ms and 480ms; Also can adapt to other business demand and improvements over the prior art, be the time period of other length.
The frame detecting unit of step 305:BTS carries out frame and detects, and recovers frame sequence.
BTS utilizes the mode of replenishing comfort noise frame copy, will be the comfort noise frame sequence of period 1 by the comfort noise frame cycle of recovering of receiving second round, carries out the rate adapted operation with the speech frame of receiving by the period 1.Wherein, the method of replenishing comfort noise frame copy is: after the frame detecting unit of BTS is whenever received a comfort noise frame, send it to the downstream rate adaptation unit of BTS, preserve the copy of this comfort noise frame simultaneously, later send this copy to the downstream rate adaptation unit of BTS, until receiving new comfort noise frame every the period 1.
Wherein, in the voice activation phase, the frame detecting unit of BTS receives that speech frame sends to the downstream rate adaptation unit of BTS, and the DTX Control Parameter is set; If owing to communication failure causes gap length is time period of period 1 to can not receive speech frame then mend an empty frame and give its downstream rate adaptation unit, and the DTX Control Parameter is set, the structure of empty frame and filling content are referring to the definition among 3GPP TS48.060 and the 3GPP TS48.061; The reason of frame or comfort noise frame of herein covering is in order to guarantee original BTS downstream rate adaptation unit and coded modulation unit not to be changed; Wherein, this DTX Control Parameter can be the SP bit in the descending trau frame, or other comprises the frame structure of speech payload, and for example RFC3551 limits that the sign speech frame still is the parameter of comfort noise frame in the frame structure.
The downstream rate adaptation unit of step 306:BTS is finished the parsing of speech frame and comfort noise frame, obtains comprising the information bit and the DTX transmission control parameters of voice messaging or comfort noise characterisitic parameter information;
Step 307:BTS carries out coded modulation to information bit, obtains speech frame or comfort noise frame after the coded modulation, and control sends speech frame after the coded modulation or comfort noise frame to portable terminal according to the DTX transmission control parameters then.
Here, (control of discontinuousness voice transmission is carried out in the open and close of control wireless transmit/receive units to the power amplifier that concrete control mode is control BTS for PA, switch PowerAmplifier).
Wherein, the IP Abis interface can adopt multiple service-level agreements to transmit the speech business frame, for example RTP (RTP, Real Time Transport Protocol) agreement etc.At this moment, the parameter of sign sign speech frame or comfort noise frame can place the ad-hoc location of Real-time Transport Protocol bag, the speech business frame that also can place Real-time Transport Protocol to transmit.
As shown in Figure 7, for a complete descending DTX voice transfer process, in general comprise three kinds of different transmission states, be respectively initial period, voice activation phase and the non-active period of voice in the descending DTX voice transfer process.Wherein, initial period is meant the period when any calling useless exists, do not transmit any speech frame or comfort noise frame in the descending DTX voice transfer Abis interface this moment, behind call setup, transfer to the voice activation phase, this moment, BSC sent speech frame to BTS by the period 1, and the speech frame of BTS after MS sends coded modulation; Then be transferred to the non-active period of voice in the voice activation phase if BSC sends the comfort noise frame to BTS, this moment, BSC sent the comfort noise frame by second round to BTS; Send speech frame at the non-active period BSC of voice to BTS and then enter the voice activation phase once more; When voice activation phase or the non-active period of voice are received call release message, come back to initial period.
The above is preferred embodiment of the present invention only, is not to be used for limiting protection scope of the present invention.Those skilled in that art should be able to associate; mode with other agreement on the IPAbis interface encapsulates the speech business frame; adopt alternate manner sign speech frame or comfort noise frame based on the descending DTX voice transfer in the IP Abis interface; the voice signal that is transmitted adopts the coded system of different rates and type, all should belong to protection scope of the present invention.
Claims (11)
1. method based on the transmission of the down discontinuousness voice of IP Abis interface is characterized in that this method may further comprise the steps:
A, send speech frame to base transceiver station in the voice activation phase by the predetermined period 1 based on the base station controller of IP Abis interface, at the non-active period of voice according to sending the comfort noise frame to base transceiver station predetermined second round;
B, base transceiver station will be by the comfort noise frames of receiving second round, by the mode cycle of recovering of replenishing comfort noise frame copy be the comfort noise frame sequence of period 1, carry out the rate adapted operation with the speech frame of receiving by the period 1.
2. the method for transmitting based on the down discontinuousness voice of IPAbis interface according to claim 1 is characterized in that the described period 1 is 20ms, and be 480ms second round.
3. the method for transmitting based on the down discontinuousness voice of IPAbis interface according to claim 1 is characterized in that before the described steps A, this method further comprises:
Whether the speech coding of judging the voice traffic channel that pulse code modulation code signal that the A interface transmitted and IP Abis interface are transmitted adopts different coded systems, if then the base station controller of the IPAbis interface pulse code modulation code signal that transmission comes according to the A interface produces new compressed voice coding and discontinuous transmission control parameters; Otherwise base station controller is the speech business frame execution in step A to receiving from the A interface directly;
Accordingly, base station controller generates the speech business frame according to the compressed voice coding and the discontinuous transmission control parameters that produce.
4. the method for transmitting based on the down discontinuousness voice of IPAbis interface according to claim 3 is characterized in that the constructor of described speech business frame is compiled in collaboration with the structure of sign indicating number conversion and Rate Adapter Unit frame or met the frame structure that RFC3551 limits.
5. the method for transmitting based on the down discontinuousness voice of IPAbis interface according to claim 1 is characterized in that after the described step B, this method further comprises step:
Base transceiver station is finished the parsing to speech frame and comfort noise frame, obtains information bit and discontinuous transmission control parameters;
Base transceiver station carries out coded modulation to information bit, obtains speech frame and comfort noise frame after the coded modulation, and according to discontinuous transmission control parameters, control sends speech frame after the coded modulation and comfort noise frame to portable terminal.
6. the method for transmitting based on the down discontinuousness voice of IPAbis interface according to claim 1 is characterized in that described step B further comprises:
In the voice activation phase, base transceiver station receives speech frame according to the period 1 and carries out rate adapted, if the time period base transceiver station of period 1 length can not receive new speech frame at interval, then mends the empty frame of a frame and carries out rate adapted.
7. device based on the transmission of the down discontinuousness voice of IP Abis interface, it is characterized in that, described device comprises: the downstream rate adaptation unit of the downstream rate adaptation unit of phonetic code type converting unit, side of base station controller, frame sending controling unit, frame detecting unit, base transceiver station side, coded modulation unit and discontinuous transmission control unit, wherein
Phonetic code type converting unit is used for the pulse code modulation code signal that transmission comes according to the A interface and produces new compressed voice coding and discontinuous transmission control parameters;
The downstream rate adaptation unit of side of base station controller, the compressed voice coding and the discontinuous transmission control parameters that are used to utilize phonetic code type converting unit to produce generate the speech business frame, and the speech business frame is sent to the frame sending controling unit;
The frame sending controling unit is used for sending a speech frame to base transceiver station in the voice activation phase by predetermined period 1, at the non-active period of voice according to sending a comfort noise frame predetermined second round to base transceiver station;
The frame detecting unit, be used for sending the downstream rate adaptation unit of speech frame to the base transceiver station side by the period 1, and utilize the mode of replenishing comfort noise frame copy, will send to the downstream rate adaptation unit of base transceiver station side according to the period 1 by the comfort noise frame of receiving second round;
The downstream rate adaptation unit of base transceiver station side is used to finish the parsing to the speech business frame, obtains information bit and discontinuous transmission control parameters;
The coded modulation unit is used to finish the information bit coding and the modulation of base transceiver station side, obtains speech frame and comfort noise frame after the coded modulation;
Discontinuous transmission control unit is used for according to discontinuous transmission control parameters, and the control base transceiver station is by the comfort noise frame of second round after portable terminal sends coded modulation, by the speech frame after the period 1 transmission coded modulation.
8. the device that transmits based on the down discontinuousness voice of IPAbis interface according to claim 7, it is characterized in that, described device also comprises: the speech frame retransmission unit of side of base station controller, will carry out yard speech business frame of type conversion from next not the needing of A interface transmission and send to the frame sending controling unit.
9. base station controller based on the transmission of the down discontinuousness voice of IP Abis interface is characterized in that described base station controller comprises: phonetic code type converting unit, downstream rate adaptation unit and frame sending controling unit, wherein,
Phonetic code type converting unit is used for the pulse code modulation code signal that transmission comes according to the A interface and produces new compressed voice coding and discontinuous transmission control parameters;
The downstream rate adaptation unit, the compressed voice coding and the discontinuous transmission control parameters that are used to utilize phonetic code type converting unit to produce generate the speech business frame, and the speech business frame is sent to the frame sending controling unit;
The frame sending controling unit is used for sending a speech frame to base transceiver station in the voice activation phase by predetermined period 1, at the non-active period of voice according to sending a comfort noise frame predetermined second round to base transceiver station.
10. the base station controller that transmits based on the down discontinuousness voice of IP Abis interface according to claim 9, it is characterized in that, described base station controller also comprises: the speech frame retransmission unit is used for sending to the frame sending controling unit with carrying out yard speech business frame of type conversion from next not the needing of A interface transmission.
11. the base transceiver station based on the down discontinuousness voice transmission of IP Abis interface is characterized in that described base transceiver station comprises: frame detecting unit, downstream rate adaptation unit, coded modulation unit and discontinuous transmission control unit, wherein,
The frame detecting unit, be used for sending speech frame to the downstream rate adaptation unit by the period 1 in the voice activation phase, and utilize the mode of replenishing comfort noise frame copy, will send to the downstream rate adaptation unit by the comfort noise frame of receiving second round according to the period 1 at the non-active period of voice;
The downstream rate adaptation unit is used to finish the parsing to the speech business frame, obtains information bit and discontinuous transmission control parameters;
The coded modulation unit is used to finish the information bit coding and the modulation of base transceiver station side, obtains speech frame and comfort noise frame after the coded modulation;
Discontinuous transmission control unit, be used for according to discontinuous transmission control parameters, the control base transceiver station is pressed the comfort noise frame of second round after portable terminal sends coded modulation at the non-active period of voice, the speech frame after the voice activation phase sends coded modulation by the period 1.
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| CN101998462A (en) * | 2010-09-28 | 2011-03-30 | 中兴通讯股份有限公司 | Method and system for increasing uplink system capacity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1171187A (en) * | 1994-11-21 | 1998-01-21 | 诺基亚电信公司 | Digital mobile communications system |
| CN1549470A (en) * | 2003-05-13 | 2004-11-24 | 西门子（中国）有限公司 | Method for enlarging measuring window in TDMA mobile communication system |
| CN1867087A (en) * | 2006-02-10 | 2006-11-22 | 华为技术有限公司 | Realization method and system for improving voice quality in wireless communication network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1171187A (en) * | 1994-11-21 | 1998-01-21 | 诺基亚电信公司 | Digital mobile communications system |
| CN1549470A (en) * | 2003-05-13 | 2004-11-24 | 西门子（中国）有限公司 | Method for enlarging measuring window in TDMA mobile communication system |
| CN1867087A (en) * | 2006-02-10 | 2006-11-22 | 华为技术有限公司 | Realization method and system for improving voice quality in wireless communication network |
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