CN103167565A - Method, base station and system for improvement of voice perceptibility in handover process in global system for mobile communications (GSM) - Google Patents
Method, base station and system for improvement of voice perceptibility in handover process in global system for mobile communications (GSM) Download PDFInfo
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- CN103167565A CN103167565A CN2011104139819A CN201110413981A CN103167565A CN 103167565 A CN103167565 A CN 103167565A CN 2011104139819 A CN2011104139819 A CN 2011104139819A CN 201110413981 A CN201110413981 A CN 201110413981A CN 103167565 A CN103167565 A CN 103167565A
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Abstract
The invention discloses a method for improvement of voice perceptibility in a handover process in the global system for mobile communications (GSM). The method comprises the steps that a base station feeds back PhyInfo to a mobile communication terminal after receiving HandoverAccess sent from the mobile communication terminal and carries out detection on downlink voice; the PhyInfo is used for replacing replaceable voice frames according to a replaceable voice frame detection result of the downlink voice; and transmission of the PhyInfo is stopped when an SABM frame sent by the mobile communication terminal is received or the number of times of transmitting reaches to the biggest value Ny1. The invention further discloses a base station and a system for the improvement of the voice perceptibility in the handover process in the GSM. According to the method, the base station and the system for the improvement of the voice perceptibility in the handover process in the GSM, the voice perceptibility can be improved.
Description
Technical field
The present invention relates to wireless communication field, relate more specifically to promote in a kind of gsm system method, base station and the system of speech perception degree when switching.
Background technology
At GSM (Global System of Mobile communication, global system for mobile communications) in, in order to improve the user to the perceptibility of call voice, quality of wireless channel descend or other situation under need by switch (HandOver, HO) to radio signal quality relatively preferably the residential quarter to improve voice quality.With the asynchronous example that switches to, general switching flow as shown in Figure 1:
network side is at the upper switching command (HandOver Command, HOCMD) that sends of former channel (BTS1), after receiving, mobile phone switches access (HandOverAccess) upper transmission of the destination channel (BTS2) of appointment, destination channel base station (BTS2) is receiving that HandOver Access responds later on physical message (Physical Information, PhyInfo) inform the current Timing Advance of mobile phone (Timing Advance, TA) information, mobile phone sends SAMB frame (Set Asynchronous Balanced Mode subsequently, set synchronous balanced model, lapdm protocol frame a kind of), (the Unnumbered Acknowledge unnumbered acknowledge (UA) of UA frame is responded in the base station, lapdm protocol frame a kind of), last mobile phone sends HandOver Complete, switching is completed, BTS1 discharges former channel.
In this process, if do not receive because degradation reason under radio signal quality causes BTS2 the SABM frame that mobile phone sends before timer T3105 is overtime, need to resend PhyInfo, send Ny1 time at most, still do not receive the SABM frame if surpass Ny1 time, base station (BTS2) reports connection failure (Connection Failure), handoff failure, mobile phone is got back to former channel (BTS1), as shown in Figure 2.
In said process, if the PhyInfo information drop-out that sends, the base station must wait until that the T3105 timer expiry could retransmit PhyInfo, and interior mobile phone of this section period is not send speech frame, so may cause voice quality decline.For this problem, in prior art, can reduce to a certain extent thereby exist by the preset time that shortens the T3105 timer method that mobile phone is received the time delay minimizing lost speech frames of PhyInfo.But this method also has shortcoming, because at first the T3105 timer arranges not longly usually, the leeway of compression is very little, and secondly PhyInfo need to send with path channels (FACCH) is upper fast by stealing frame, and transmission times frequently also can impact the downlink voice quality.
Summary of the invention
Main purpose of the present invention is to provide a kind of method that promotes speech perception degree when switching in gsm system, is intended to optimize asynchronous switching flow, thereby promotes the speech perception degree.
In order to realize goal of the invention, the invention provides a kind of method that promotes speech perception degree when switching in gsm system, it comprises the following steps:
The base station to mobile communication terminal feedback physical message PhyInfo, starts the detection to downlink voice simultaneously after receiving the switching access Handover Access that mobile communication terminal sends;
According to the testing result that the speech frame of downlink voice can be replaced, insert PhyInfo and replace the speech frame that can be replaced;
When receiving the set synchronous balanced model SABM frame of mobile communication terminal transmission or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo.
Preferably, described startup comprises the detection of downlink voice:
Whether speech frame lacks or can be replaced to detect downlink voice.
Preferably, described detection downlink voice whether speech frame disappearance or can be replaced specifically comprise:
Whether detect downlink voice because discontinuous transmitting DTX causes the speech frame disappearance, perhaps owing to just in time causing speech frame to be replaced between two voice bursts Burst.
Preferably, the described testing result that can be replaced according to the speech frame of downlink voice, insertion PhyInfo comprises before replacing the speech frame that can be replaced:
Insert PhyInfo and be sent to mobile communication terminal according to the testing result of speech frame disappearance.
The invention provides the base station that promotes speech perception degree when switching in a kind of gsm system, it comprises hand-off process module, downlink voice detection module and speech frame processing module, wherein,
Described hand-off process module is used for after receiving the Handover Access that mobile communication terminal sends, to mobile communication terminal feedback PhyInfo;
Described downlink voice detection module is used for starting the detection to downlink voice to mobile communication terminal feedback PhyInfo the time;
The testing result that described speech frame processing module can be replaced for the speech frame according to downlink voice is inserted PhyInfo and is replaced the speech frame that can be replaced; When receiving the SABM frame of mobile communication terminal transmission or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo.
Preferably, specifically whether speech frame lacks or can be replaced described downlink voice detection module for detection of downlink voice.
Preferably, whether described downlink voice detection module is further used for detecting downlink voice because discontinuous transmitting DTX causes the speech frame disappearance, perhaps owing to just in time causing speech frame to be replaced between two voice bursts Burst.
Preferably, described speech frame processing module is further used for:
Insert PhyInfo and be sent to mobile communication terminal according to the testing result of speech frame disappearance.
The present invention separately provides a kind of gsm system, and it comprises mobile communication terminal and base station, and described base station comprises hand-off process module, downlink voice detection module and speech frame processing module, wherein,
Described hand-off process module is used for after receiving the Handover Access that mobile communication terminal sends, to mobile communication terminal feedback PhyInfo;
Described downlink voice detection module is used for starting the detection to downlink voice to mobile communication terminal feedback PhyInfo the time;
The testing result that described speech frame processing module can be replaced for the speech frame according to downlink voice is inserted PhyInfo and is replaced the speech frame that can be replaced; When receiving the SABM frame of mobile communication terminal transmission or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo.
Preferably, described mobile communication terminal is mobile phone.
The present invention is on the almost not impact of normal downlink speech frame, but can shorten the time that mobile communication terminal (such as mobile phone etc.) is received PhyInfo, especially in the ropy situation of wireless environment, increased the frequency that issues of PhyInfo, success rate and the promptness of mobile phone reception PhyInfo have been promoted, thereby reduce the loss of speech frame, promote the speech perception degree.The present invention does not need redesign to the not conflict of existing module of software and hardware, and cost is less.
Description of drawings
Fig. 1 is the signaling process figure of asynchronous switching under normal circumstances in prior art;
Fig. 2 is the signaling process figure of asynchronous switching under abnormal conditions in prior art;
Fig. 3 promotes the flow chart of the embodiment of the method for speech perception degree when switching in gsm system of the present invention;
Fig. 4 promotes the signaling process figure of the embodiment of the method for speech perception degree when switching in gsm system of the present invention;
Fig. 5 promotes the structural representation of the base station embodiment of speech perception degree when switching in gsm system of the present invention.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 3, the flow chart of the embodiment of the method for speech perception degree when switching for promoting in gsm system of the present invention.As shown in Figure 3, the method comprises the following steps:
step S10, the base station to mobile communication terminal feedback physical message PhyInfo, starts the detection to downlink voice simultaneously after receiving the switching access Handover Access that mobile communication terminal sends, in the present invention, mobile communication terminal can be mobile phone, the base station is provided with the downlink voice detection module, receiving the up switching access Handover Access of mobile phone transmission in the base station after, during to mobile phone feedback physical message PhyInfo, this downlink voice detection module starts the detection to downlink voice, whether lack or can be replaced to detect the speech frame that should be sent to mobile phone, for example, whether can detect downlink voice due to DTX (Discontinuous Transmission, discontinuous transmission) cause the speech frame disappearance, perhaps owing to just in time causing speech frame to be replaced between two voice Burst (burst).
Step S20 according to the testing result that the speech frame of downlink voice can be replaced, inserts PhyInfo and replaces the speech frame that can be replaced; This step reality is in two kinds of situation: can be replaced if the speech frame of downlink voice detected, insert PhyInfo and replace the speech frame that can be replaced; If the speech frame disappearance of downlink voice detected, insert PhyInfo and be sent to mobile phone according to the testing result of speech frame disappearance.
Step S30 when receiving the SABM frame of mobile communication terminal transmission or reaching maximum number of times of transmission Ny1, stops the transmission of PhyInfo.With reference to Fig. 4, in the embodiment of the present invention, in step S20, within the time of T3105 timer, repeat to send a plurality of PhyInfo to mobile phone, until when receiving the SABM frame that mobile phone sends or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo always.
The inventive method embodiment is owing to sending PhyInfo to mobile phone when the speech frame disappearance being detected or can be replaced, can shorten mobile phone and receive the time of PhyInfo, especially in the ropy situation of wireless environment, increased the frequency that issues of PhyInfo, success rate and the promptness of mobile phone reception PhyInfo have been promoted, thereby reduce the loss of speech frame, promote the speech perception degree.The present invention does not need redesign to the not conflict of existing module of software and hardware, and cost is less.
With reference to Fig. 5, propose to promote in a kind of gsm system of the present invention the base station embodiment of speech perception degree when switching, said method can be realized in this base station.As shown in Figure 5, embodiment of the present invention base station comprises hand-off process module 10, downlink voice detection module 20 and speech frame processing module 30, wherein,
Hand-off process module 10 is used for after receiving the Handover Access that mobile communication terminal sends, to mobile communication terminal feedback PhyInfo;
Downlink voice detection module 20 is used for starting the detection to downlink voice to mobile communication terminal feedback PhyInfo the time; For example, whether downlink voice detection module 20 can detect the speech frame that should be sent to mobile phone and lack or can be replaced.Concrete, whether can detect downlink voice because DTX (Discontinuous Transmission, discontinuous transmission) causes the speech frame disappearance, perhaps owing to just in time causing speech frame to be replaced between two voice Burst (burst).
The testing result that speech frame processing module 30 can be replaced for the speech frame according to downlink voice is inserted PhyInfo and is replaced the speech frame that can be replaced; When receiving the SABM frame of mobile communication terminal transmission or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo.Concrete, if detecting the speech frame of downlink voice, speech frame processing module 30 can be replaced, insert PhyInfo and replace the speech frame that can be replaced; If the speech frame disappearance of downlink voice detected, insert PhyInfo and be sent to mobile phone according to the testing result of speech frame disappearance.Within the time of T3105 timer, speech frame processing module 30 repeats to send a plurality of PhyInfo to mobile phone always, until when receiving the SABM frame that mobile phone sends or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo.
Base station embodiment of the present invention is owing to being provided with hand-off process module 10, downlink voice detection module 20 and speech frame processing module 30 in the base station, send PhyInfo to mobile phone when the speech frame disappearance being detected or can be replaced, can shorten mobile phone and receive the time of PhyInfo, especially in the ropy situation of wireless environment, increased the frequency that issues of PhyInfo, promote mobile phone and received success rate and the promptness of PhyInfo, thereby reduced the loss of speech frame, promoted the speech perception degree.The present invention does not need redesign to the not conflict of existing module of software and hardware, and cost is less.
The present invention also provides a kind of gsm system, this gsm system comprises base station and the mobile communication terminal of speech perception degree when above-mentioned lifting is switched, wherein mobile communication terminal can be mobile phone, and the structure and the operation principle that promote the base station of speech perception degree when switching can with reference to earlier figures 3 to embodiment illustrated in fig. 5, just not given unnecessary details at this.The base station that has above-mentioned lifting speech perception degree when switching due to gsm system of the present invention can increase the frequency that issues of PhyInfo, and promotes success rate and promptness that mobile phone receives PhyInfo, thereby reduces the loss of speech frame, promotes the speech perception degree.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (10)
1. promote the method for speech perception degree when switching in a gsm system, it is characterized in that, comprise the following steps:
The base station to mobile communication terminal feedback physical message PhyInfo, starts the detection to downlink voice simultaneously after receiving the switching access Handover Access that mobile communication terminal sends;
According to the testing result that the speech frame of downlink voice can be replaced, insert PhyInfo and replace the speech frame that can be replaced;
When receiving the set synchronous balanced model SABM frame of mobile communication terminal transmission or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo.
2. the method for claim 1, is characterized in that, described startup comprises the detection of downlink voice:
Whether speech frame lacks or can be replaced to detect downlink voice.
3. method as claimed in claim 2, is characterized in that, described detection downlink voice whether speech frame disappearance or can be replaced specifically comprises:
Whether detect downlink voice because discontinuous transmitting DTX causes the speech frame disappearance, perhaps owing to just in time causing speech frame to be replaced between two voice bursts Burst.
4. method as claimed in claim 2 or claim 3, is characterized in that, the described testing result that can be replaced according to the speech frame of downlink voice is inserted PhyInfo and comprised before replacing the speech frame that can be replaced:
Insert PhyInfo and be sent to mobile communication terminal according to the testing result of speech frame disappearance.
5. promote the base station of speech perception degree when switching in a gsm system, it is characterized in that, comprise hand-off process module, downlink voice detection module and speech frame processing module, wherein,
Described hand-off process module is used for after receiving the Handover Access that mobile communication terminal sends, to mobile communication terminal feedback PhyInfo;
Described downlink voice detection module is used for starting the detection to downlink voice to mobile communication terminal feedback PhyInfo the time;
The testing result that described speech frame processing module can be replaced for the speech frame according to downlink voice is inserted PhyInfo and is replaced the speech frame that can be replaced; When receiving the SABM frame of mobile communication terminal transmission or reaching maximum number of times of transmission Ny1, stop the transmission of PhyInfo.
6. base station as claimed in claim 5, is characterized in that, specifically whether speech frame lacks or can be replaced described downlink voice detection module for detection of downlink voice.
7. base station as claimed in claim 6, it is characterized in that, whether described downlink voice detection module is further used for detecting downlink voice because discontinuous transmitting DTX causes the speech frame disappearance, perhaps owing to just in time causing speech frame to be replaced between two voice bursts Burst.
8. base station as described in claim 6 or 7, is characterized in that, described speech frame processing module is further used for:
Insert PhyInfo and be sent to mobile communication terminal according to the testing result of speech frame disappearance.
9. a gsm system, is characterized in that, comprises mobile communication terminal and base station as described in any one in claim 5 to 7.
10. gsm system as claimed in claim 9, is characterized in that, described mobile communication terminal is mobile phone.
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| CN104168612A (en) * | 2014-08-25 | 2014-11-26 | 京信通信系统（中国）有限公司 | Method and device for achieving switching between base stations |
| WO2015192532A1 (en) * | 2014-06-20 | 2015-12-23 | 中兴通讯股份有限公司 | Method and apparatus for improving handover voice quality |
| CN107027156A (en) * | 2016-01-29 | 2017-08-08 | 华为技术有限公司 | A kind of method and terminal device for sending speech frame |
| CN111212452A (en) * | 2020-01-13 | 2020-05-29 | 海能达通信股份有限公司 | Handover method, communication system, terminal and storage device for voice communication |
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| WO2015192532A1 (en) * | 2014-06-20 | 2015-12-23 | 中兴通讯股份有限公司 | Method and apparatus for improving handover voice quality |
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| CN104168612A (en) * | 2014-08-25 | 2014-11-26 | 京信通信系统（中国）有限公司 | Method and device for achieving switching between base stations |
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| CN111212452A (en) * | 2020-01-13 | 2020-05-29 | 海能达通信股份有限公司 | Handover method, communication system, terminal and storage device for voice communication |
| CN111212452B (en) * | 2020-01-13 | 2022-05-17 | 海能达通信股份有限公司 | Handover method for voice communication, communication system, terminal and storage medium |
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