CN101394224B - Service frame sending method and device - Google Patents
Service frame sending method and device Download PDFInfo
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- CN101394224B CN101394224B CN 200710151247 CN200710151247A CN101394224B CN 101394224 B CN101394224 B CN 101394224B CN 200710151247 CN200710151247 CN 200710151247 CN 200710151247 A CN200710151247 A CN 200710151247A CN 101394224 B CN101394224 B CN 101394224B
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Abstract
The invention discloses a method for sending service frames, which comprises the following steps: a home terminal base station receives the coming service frame; and the home terminal base station stores the SID frame when the service frame includes a mute-described SID frame, and the home terminal base station sends the latest stored local SID frame when that no voice frame is sent at the pre-set time is determined. By applying the method provided by the embodiment of the invention, the latest local SID frame stored in the base station can be sent even when no voice frame is sent at the time that the downlink TAF is 1 when an interface A carries out the voice transmission by utilizing an IP protocol, thereby solving the problems that MS downlink measurement is incorrect and the mute can not be recovered timely.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of sending method and device of traffic frame.
Background technology
Gsm system (Global System for Mobile Communication, digital cellular mobile communication systems) according to (the European Telecommunications StandardsInstitute of the ETS committee, ETSI) the GSM standard of formulating develops, it is Generation Mobile Telecommunication System technology (SecondGeneration, 2G).Its exploitation purpose is to allow all parts of the world can jointly use a mobile telephone network standard, allows the user use a MS just can manage it all over the whole world.Gsm communication system is mainly by mobile switch subsystem (Mobile Switching Subsystem, MSS), base station sub-system (Base SubSystem, BSS) and travelling carriage (Mobile station, MS) three parts form, wherein the interface between MSS and the BSS is the A interface, and the interface between BSS and the MS is Um Interface (being commonly referred to air interface).
The bearing mode of GSM is just by traditional time division multiplexing (Time Division Multiplexing, TDM), asynchronous transfer mode (Asynchronous Transfer Mode, ATM), finally to the transition of IP bearing technology.Compare with traditional TDM/ATM bearing mode, the IP agreement is simple, flexibility strong, professional expansion is convenient, can avoid operator's overlapping investment on the service network of separating, good springiness, upgrade maintenance is convenient, can decrease network construction cost and operation expense.
A interface in GSM adopts IP protocol transmission voice, and core net can directly encapsulate and pass to BSS with the compressed voice bag.Core net is responsible for processing the relevant affairs of all encoding and decoding, the encoding and decoding conversion after comprising coding/decoding negotiation and consulting unsuccessfully, and finish the exchange of packets of voice.This scheme takes full advantage of the characteristic of Soft core net, by supporting Transcoder Free Operation (Transcoder Free Operation, TrFO), promote voice quality, reduced code pattern converter (Transcoder, TC) use of resource, save the transmission bandwidth on the A interface, also simplified the design of BSS simultaneously; BSS will carry out chnnel coding with voice packet after having received the voice packet that core net issues, send to air interface; MS receives voice packet from air interface, carries out source coding and produces downlink voice.
The A interface adopts IP protocol transmission voice, and the transmission of the downlink business frame of user's face can be as shown in Figure 1 so.Wherein, for the network equipment of each producer better interconnects, the A interface can adopt standard to send in real time agreement (Real-time Transport Protocol, RTP) agreement and encapsulate voice.As adopting 3GPP TS 101 318 agreements to encapsulate to enhanced full rate/full rate/half-rate speech compression (Enhanced Full Rate, EFR/Full Rate, FR/Half Rate, HR).In order to make the voice byte-aligned of encapsulation, the agreement regulation has increased by 1,100 four bit for EFR before payload data, increased by 1,101 four bit at FR before payload data, and for HR, because data own are all alignd, therefore just there is not extra increase bit.
GSM is a kind of multiservice system, can be according to the user need to provide various forms of communications for the user.Traditionally voice service and data service (or calling non-speech service) difference are come.In the voice service, information is speech, and data service sends the out of Memory that comprises text, image, fax and computer documents etc.And in typical conversation on course, the mobile subscriber only has 40% time for conversation, and the most of the time is not transmitted speech information.If the information in the time of therefore will not conversing all sends to network, not only cause the waste of system resource, also can the interior interference of heavy system.
For These characteristics, GSM has introduced discontinuous emission (Discontinuous Transmission, DTX) function, namely closes the emission channel of MS when the mobile subscriber does not converse, thereby reaches the purpose that reduces interference level and improve system effectiveness.In addition, this DTX function can also be saved the power consumption of MS, prolongs the stand-by time of MS.
The present inventor after further study, find to exist in the above-mentioned technology following problem, be described below: the downlink voice bag is transparent to base station controller (Base Station Controller by the A interface, BSC), BSC carries out inner conversion and gives base station (Base Transceiver Station, BTS), carry out chnnel coding by BTS and send to MS at the Um mouth.Agreement regulation according to GSM, when descending DTX opens, for EFR/FR/HR at TAF (Time Alignment Flag, the time unifying sign) is moment of 1, descendingly must send an effective frame, if having speech frame just to send speech frame this moment, if there is not speech frame, just should send a SID (Silence Descriptor, silence description frames) frame.Under the TDM mode, the TC of BSC side can produce speech frame or SID frame endlessly.But after after the A interface adopts IP protocol transmission voice, moved on to media gateway (Media Gateway on the TC, MGW), the A interface only transmits valid frame, when the base station is moment of 1 at TAF, may can not receive the valid frame that the A interface transmits, cause this moment can send out without frame, can only close power or send infilled frame in the base station, thereby affect voice quality or mobile phone to descending measurement.
Summary of the invention
Embodiments of the invention have disclosed a kind of sending method and device of traffic frame, be used for when the base station be 1 constantly can send out without speech frame the time at descending TAF, the up-to-date SID frame of a base station stored of transmission.
For achieving the above object, the embodiment of the invention proposes a kind of sending method of traffic frame on the one hand, may further comprise the steps: the local terminal base station receives the traffic frame that transmits, when the traffic frame that receives comprises quiet description SID frame, the described SID frame of described local terminal base station stored; When default constantly judgement did not have speech frame to send, described local terminal base station sent the SID frame of local up-to-date storage when described.。
On the other hand, the embodiment of the invention also provides a kind of dispensing device of traffic frame, comprise detection module, memory module and sending module, described detection module, whether comprise the SID frame for detection of the traffic frame that receives, when the described traffic frame that receives comprises the SID frame, send to described memory module; Described memory module is used for storing the up-to-date SID frame that described detection module sends; Described sending module is used for when constantly not receiving speech frame, sending the up-to-date SID frame of storing in the described memory module default.
Embodiments of the invention have the following advantages:
The method that the application of the invention embodiment provides, when the A interface uses the IP agreement to carry out voice transfer, 1 constantly can send out without speech frame even at descending TAF be, also can send the SID frame of the up-to-date storage of a base station stored, thereby solve the untimely problem of the incorrect and quiet recovery of down-run survey of MS.
Description of drawings
The transmission exemplary plot of downlink business frame when Fig. 1 is A interface employing IP protocol transmission voice;
Fig. 2 is the topology example figure of the dispensing device of a kind of traffic frame of disclosing of the embodiment of the invention;
Fig. 3 is the flow example figure of the sending method of a kind of traffic frame of disclosing of the embodiment of the invention one;
Fig. 4 is the flow example figure of the sending method of a kind of traffic frame of disclosing of the embodiment of the invention two;
Fig. 5 is the distribution example figure of the traffic frame that the base station sends in the embodiment of the invention two.
Embodiment
In the method that following examples are described, the A interface adopts IP agreement transmitting voice service between base station and core net, adopts standard Real-time Transport Protocol encapsulation voice.The embodiment of the invention detects the traffic frame that the telepoint base station that receives sends by the local terminal base station, described traffic frame comprises speech frame or SID frame at least, judge whether this traffic frame comprises continuous speech frame, if comprise continuous speech frame, the local terminal base station sends continuous speech frame according to the normal transmission pattern to MS; Otherwise determine that downlink sending mode is the DTX pattern, this traffic frame is sent, judge simultaneously whether this traffic frame comprises the SID frame, when this traffic frame comprises the SID frame, up-to-date described SID frame of local terminal base station stored; When descending TAF is moment of 1, and when not receiving speech frame, the local terminal base station sends to MS with the SID frame of up-to-date storage, so that MS can carry out down-run survey according to this SID frame, thereby avoids the untimely problem of the inaccurate and quiet recovery of down-run survey.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
As shown in Figure 2, for the embodiment of the invention disclose a kind of structure chart of dispensing device of traffic frame.This device 1 comprises traffic frame receiver module 11, traffic frame judge module 12, downlink sending mode adjusting module 13, traffic frame sending module 14, detection module 15, memory module 16 and sending module 17.
The below describes as example to install 1:
In the device 1, can comprise: traffic frame receiver module 11 is used for receiving the traffic frame that transmits by core net, i.e. the uplink service frame of telepoint base station.Traffic frame judge module 12, whether the traffic frame that adopts specific speech coding algorithm to judge that traffic frame receiver module 11 receives comprises continuous speech frame, and judged result is sent to downlink sending mode adjusting module 13.Downlink sending mode adjusting module 13, be used for the judged result according to traffic frame judge module 12, when traffic frame judge module 12 judges that traffic frame comprises discontinuous speech frame, determine that downlink sending mode is the DTX pattern, be about to device 1 descending sending mode and be set to descending DTX pattern.If traffic frame judge module 12 is judged when traffic frame comprises continuous speech frame, then send according to normal transmission mode.Traffic frame sending module 14 is used for sending traffic frame to MS.
With or, device 1 can comprise: detection module 15, memory module 16 and sending module 17 can be used for solving because the base station is 1 o'clock countless untimely problem of the inaccurate and quiet recovery of down-run survey according to causing to the MS transmission at descending TAF.Detection module 15 is used for judging whether the traffic frame that receives comprises the SID frame, if the SID frame sends to memory module 16 with this SID frame.Take the encryption algorithm of the EFR/FR/HR of GSM as example, although the bit number of speech frame SP frame and the transmission of SID frame is identical, but the effective value of SP frame is different with the effective value of SID, the effective value of SP frame is many, and the effective value of SID frame is few, can fixedly fill in the position of SID frame invalid value 0 or 1 (can select the different modes of filling in according to different coded systems), therefore as long as detect these fixed positions whether fixing 0 or 1 (according to the mode of filling in of different coded systems, the position of detecting can be not identical yet), just can judge that this frame is SP frame or SID frame.Memory module 16 is used for the up-to-date SID frame that storing received arrives.Device 1 can directly be issued MS with the speech frame of receiving after definite downlink sending mode is the DTX pattern, equally also first SID frame behind the speech frame also can be issued MS, the up-to-date SID frame of receiving can be kept in the memory module 16 but install 1.Sending module 17, being used at descending TAF is 1 and when not receiving speech frame, and the SID frame of memory module storage is sent to MS, so that MS can carry out down-run survey according to this SID frame, thereby avoids the untimely problem of the inaccurate and quiet recovery of down-run survey.
Be understandable that, (or described in present embodiment) shown in the accompanying drawing 2 device 1 only is schematic, the wherein said unit that shows as separating component can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Also can select according to the actual needs wherein some or all of module to realize the purpose of present embodiment scheme.
By the device that uses above-described embodiment to provide, when the A interface uses the IP agreement to carry out voice transfer, 1 constantly can send out without speech frame even at descending TAF be, also can send the up-to-date SID frame of a base station stored, thereby solve the untimely problem of the incorrect and quiet recovery of down-run survey of MS.
The sending method of a kind of traffic frame that embodiments of the invention one disclose as shown in Figure 3, concrete steps are as follows:
Step S301, the base station receives traffic frame.
Described traffic frame comprises speech frame or SID frame at least.
Step S302, the base station judges whether described traffic frame comprises continuous speech frame, if do not comprise continuous speech frame, turns step S303, otherwise, this traffic frame is sent and finish according to normal mode.
Step S303, when this traffic frame comprised discontinuous speech frame, the base station determined that downlink sending mode is the DTX pattern.
Step S304, the base station sends traffic frame according to the DTX pattern to air interface.
Further,
Step S305, the base station can continue to judge whether the traffic frame of receiving comprises the SID frame, if so, turns step S306, otherwise this traffic frame is not dealt with.
Step S306, the up-to-date SID frame that base station stored receives.
Step S307, in the moment of downgoing time alignment mark TAF=1, whether the base station is judged has speech frame to send, if there is not speech frame to send, turns step S308, otherwise sends speech frame.
Step S308, the base station sends the up-to-date SID frame of local storage.
The sending method of a kind of traffic frame that provides by above-described embodiment one, when the A interface uses the IP agreement to carry out voice transfer, 1 constantly to send out without speech frame even at descending TAF be, also can send the up-to-date SID frame of a base station stored, efficiently solve the untimely problem of the incorrect and quiet recovery of down-run survey of MS.
The sending method of a kind of traffic frame that discloses in the embodiments of the invention two as shown in Figure 4, comprises step:
Step S401, the base station receives the traffic frame that core net sends, i.e. the uplink service frame of telepoint base station.Described traffic frame comprises speech frame or SID frame at least.
Step S402 after this traffic frame is received in the base station, adopts specific speech coding algorithm to judge whether this traffic frame comprises continuous speech frame, if so, turns step S403, otherwise turns step S404.
Step S403, the base station sends to air interface according to normal mode with this traffic frame.
Step S404, the base station determines that downlink sending mode is the DTX pattern, the transmission state that is about to base station down is set to descending DTX and sends state.
Step S405, the base station sends traffic frame according to the DTX pattern to air interface.
Concrete, the base station can only send the traffic frame of following three types to air interface:
(1) frame of speech frame (indicating that namely SP is 1 frame);
(2) first SID frame behind the speech frame (being that one or more sign SP are that first sign SP behind 1 the frame is 0 frame);
(3) the SID frame of TAF=1 (namely indicate SP be 0 and with the frame of SACCH (Slow Assisted ControlChannel, at a slow speed auxiliary control channel) multi-frame structure alignment), the SID frame that namely upgrades take 480ms as the cycle.
Can be with reference to figure 5, Fig. 5 is the distribution example figure of the traffic frame of base station transmission.
Step S406, the base station is detected the traffic frame of receiving, and whether that judges this traffic frame comprises the SID frame, if so, turns step S407, otherwise can continue to send this traffic frame.
Take the encryption algorithm of the EFR/FR/HR of GSM as example, although the bit number of speech frame SP frame and the transmission of SID frame all is identical, but the effective value of SP frame is not identical with the effective value of SID, the effective value of SP frame is many, and the effective value of SID frame is few, can in the SID frame, fixedly fill in 0 or 1 (can select the different modes of filling in according to different coded systems) in the position of invalid value, therefore receiving terminal just can judge that this frame is SP frame or SID frame as long as detect 0 or 1 (can determine according to the identification means of different coded systems) whether these fixed positions are fixed.
Step S407, the up-to-date SID frame of receiving of base station stored.
Concrete, air interface can directly be issued with the speech frame of receiving in the base station after definite downlink sending mode is the DTX pattern, also first SID frame behind the speech frame also can be issued air interface, and the SID frame of receiving is preserved in the base station simultaneously.When new SID frame was received in the base station, available new SID frame covered original SID frame, and the SID frame that makes storage is the up-to-date SID frame of receiving.
Step S408 is moment of 1 at descending TAF, and the base station judges that this is carved with and does not have speech frame to send, if having, turns step S409, otherwise turns step S410.
Step S409, the base station continues to send speech frame to air interface.
Step S410, the base station sends the up-to-date SID frame of storage.
Concrete, can be to be moment of 1 at descending TAF, and when not receiving speech frame, the SID frame of storage is sent to air interface, so that descending MS can carry out down-run survey according to this SID frame, thereby avoid the untimely problem of the inaccurate and quiet recovery of down-run survey.
By the method for using above-described embodiment two to provide, when the A interface uses the IP agreement to carry out voice transfer, 1 constantly to send out without speech frame even at descending TAF be, also can send the up-to-date SID frame of a base station stored, thereby solve the untimely problem of the incorrect and quiet recovery of down-run survey of MS.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode in a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in the storage medium, such as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above only is that the present inventor thinks at present important and preferred embodiment; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the sending method of a traffic frame is characterized in that, may further comprise the steps:
The local terminal base station receives the traffic frame that transmits;
Described local terminal base station judges whether the described traffic frame that receives comprises continuous speech frame;
When described traffic frame comprised discontinuous speech frame, described local terminal base station determined that downlink sending mode is discontinuous emission (DTX) pattern;
Described local terminal base station determines that downlink sending mode is after the DTX pattern, also comprises:
When the traffic frame that receives comprises quiet description (SID) frame, the described SID frame of described local terminal base station stored;
When default constantly judgement did not have speech frame to send, described local terminal base station sent the SID frame of local up-to-date storage when described;
Default constantly at downgoing time alignment mark (TAF) being moment of 1.
2. the sending method of traffic frame as claimed in claim 1 is characterized in that, described local terminal base station judges that whether the traffic frame that receives comprises the SID frame, comprising:
Obtain the invalid value field of described traffic frame;
According to the sign of described invalid value field, judge whether described traffic frame comprises the SID frame.
3. the sending method of traffic frame as claimed in claim 1 is characterized in that, the traffic frame that described local terminal base station sends according to the DTX pattern comprise at least behind speech frame, the speech frame first SID frame and and TAF be 1 constantly SID frame.
4. the dispensing device of a traffic frame is characterized in that, comprises detection module, memory module and sending module,
Described detection module is used under discontinuous emission (DTX) pattern, detects the traffic frame that receives and whether comprises quiet description (SID) frame, when the described traffic frame that receives comprises the SID frame, sends to described memory module;
Described memory module is used for storing the up-to-date SID frame that described detection module sends;
Described sending module when not receiving speech frame for the moment that at downgoing time alignment mark (TAF) is 1, sends the up-to-date SID frame of storing in the described memory module.
5. the dispensing device of traffic frame as claimed in claim 4 is characterized in that, also comprises the downlink sending mode adjusting module,
Described downlink sending mode adjusting module when comprising discontinuous speech frame for the traffic frame that receives when described device, determines that downlink sending mode is the DTX pattern.
6. the dispensing device of traffic frame as claimed in claim 5 is characterized in that, also comprises traffic frame receiver module and traffic frame judge module,
Described traffic frame receiver module is used for receiving traffic frame;
Described traffic frame judge module is used for judging whether the traffic frame that described traffic frame receiver module receives comprises continuous speech frame, and notifies described downlink sending mode adjusting module with judged result.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710151247 CN101394224B (en) | 2007-09-17 | 2007-09-17 | Service frame sending method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710151247 CN101394224B (en) | 2007-09-17 | 2007-09-17 | Service frame sending method and device |
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| CN101394224A CN101394224A (en) | 2009-03-25 |
| CN101394224B true CN101394224B (en) | 2013-01-30 |
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| CN 200710151247 Expired - Fee Related CN101394224B (en) | 2007-09-17 | 2007-09-17 | Service frame sending method and device |
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| CN107682360B (en) * | 2017-10-31 | 2020-09-08 | 维沃移动通信有限公司 | Voice call processing method and mobile terminal |
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