CN102255686A - Adaptive multi-rate codec (AMR) initial rate regulation method, device and system - Google Patents
Adaptive multi-rate codec (AMR) initial rate regulation method, device and system Download PDFInfo
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Abstract
The invention provides an adaptive multi-rate codec (AMR) initial rate regulation method, an AMR initial rate regulation device and an AMR initial rate regulation system. The method comprises the following steps of: acquiring a source channel active codec set (ACS), a target channel ACS and the uplink rate of a user on a source channel; determining the AMR initial rate of the user on the source channel according to the source channel ACS, the target channel ACS and the uplink rate of the user on the source channel; and informing the user of using the AMR initial rate of the user on a target channel by using signaling. By the method, the probability of user rate overstepping regulation before and after switching is reduced, wireless measurement results in a switching process are improved, unnecessary rate regulation in the switching process is reduced, voice quality is improved, and a mean opinion score (MOS) is increased.
Description
Technical field
The present invention relates to field of wireless communication, relate in particular to the methods, devices and systems of under situation such as switch, adjusting the AMR initial rate.
Background technology
Self-adaption multi-speed encoding/decoding (AMR, Adaptive Multi-Rate Codec) technology can be adjusted code rate according to the actual volume size of current network and the quality of communication channel quality, compromise in the hope of between power system capacity and voice quality, doing, under the prerequisite of the certain voice quality of maintenance, for more user provides service.When channel quality is poor, should increase more chnnel coding protection, even make it under extremely abominable propagation conditions, also can keep certain voice quality.If instead channel quality is relatively good, at this moment just can increase the speech coding part, obtain better voice quality.
When existing system uses the AMR voice encoding and decoding mode to carry out the channel switching, the AMR initial rate of user on destination channel obtains by switching command, and the initial rate of indicating in the switching command is the fixed configurations of backstage parameter, and the user carries out Dynamic Selection in the upstream rate of source channel in the time of can't taking place according to switching.Will cause the non-essential adjustment of speed like this, even can cause the adjustment of bypassing the immediate leadership of user rate, promptly adjusting former and later two speed is not that activation rate is gathered the adjacent speed in (ACS, Active Codec Set).This kind situation can influence the quality of voice, influences the measurement result of wireless quality, and is also lower with the average subjective scoring of objective voice (MOS, Mean Opinion Score) instrument test score value.
Summary of the invention
In order to solve in the prior art the not good problem of voice quality behind the switching channels, the invention provides a kind of methods, devices and systems of the AMR of adjustment initial rate.
According to an aspect of the present invention, a kind of method of the AMR of adjustment initial rate is provided, comprise, obtain source channel activation rate set A CS, destination channel activation rate set A CS and user upstream rate at the source channel, determine the user at the AMR of destination channel initial rate according to source channel ACS, destination channel ACS and user in the upstream rate of source channel, use the user at the AMR of destination channel initial rate by the signaled user.
Further, determine that in the upstream rate of source channel the user is at the AMR of destination channel initial rate according to source channel ACS, destination channel ACS and user, be specially: the common factor that calculates source channel ACS and destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
Further, obtain destination channel ACS, be specially: the source base station controller is informed source base station by the pre-switch notice with destination channel ACS;
Use the user at the AMR of destination channel initial rate by the signaled user, be specially: source base station determines that the user is behind the AMR of destination channel initial rate, reply by pre-switch notice the user is informed the source base station controller at the AMR of destination channel initial rate, the source base station controller is informed user with the user at the AMR of destination channel initial rate by switching command.
Further, obtain source channel ACS and user in the upstream rate of source channel, be specially: source base station is replied by the pre-switch notice source channel ACS and user is informed the source base station controller in the upstream rate of source channel;
Use the user at the AMR of destination channel initial rate by the signaled user, be specially: the source base station controller is determined the user behind the AMR of destination channel initial rate, and the source base station controller is informed user with the user at the AMR of destination channel initial rate by switching command.
According to another aspect of the present invention, provide a kind of device of the AMR of adjustment initial rate, having comprised:
Acquisition module is used to obtain source channel activation rate set A CS, destination channel activation rate set A CS and the user upstream rate at the source channel;
Computing module is used for determining that in the upstream rate of source channel the user is at the AMR of destination channel initial rate according to source channel ACS, destination channel ACS and user;
Notification module is used for using the user at the AMR of destination channel initial rate by the signaled user.
Further, computing module, specifically be used to calculate the common factor of source channel ACS and destination channel ACS,, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate if exist to occur simultaneously; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
According to another aspect of the present invention, a kind of system of the AMR of adjustment initial rate is provided, comprise base station controller and base station, base station controller is informed the base station with destination channel activation rate set A CS, the base station determines that in the upstream rate of source channel the user is at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, and the user informed base station controller at the AMR of destination channel initial rate, base station controller uses the user at the AMR of destination channel initial rate by the signaled user.
Further, the base station determines that in the upstream rate of source channel the user is specially at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, the common factor of calculating source channel ACS and destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
According to another aspect of the present invention, a kind of system that adjusts the AMR initial rate, comprise base station controller and base station, the base station is informed base station controller with source channel activation rate set A CS and user in the upstream rate of source channel, base station controller is determined the user at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known in the upstream rate of source channel, and uses the user to inform the user at the AMR of destination channel initial rate by the signaled user.
Further, base station controller determines that in the upstream rate of source channel the user is specially at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, the common factor of calculating source channel ACS and destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
Methods, devices and systems provided by the invention have reduced on the one hand before and after switching, and user rate the bypass the immediate leadership possibility of adjustment has improved measurement result wireless in the handoff procedure; The opposing party reduces non-essential speed adjustment in handoff procedure, has improved the MOS score value of voice quality and objective evaluation.
Description of drawings
Fig. 1 is the method flow embodiment that an AMR initial rate of the present invention is adjusted;
Fig. 2 is the outline flowchart that calculates user's AMR initial rate on destination channel;
Fig. 3 adjusts AMR initial rate flow chart in the switching flow of the present invention;
Fig. 4 is that the AMR initial rate is adjusted design sketch in the existing system switching flow;
Fig. 5 is to use AMR initial rate adjustment design sketch in the switching flow of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figure 1
101) obtain source channel ACS set, destination channel ACS set and user are in the upstream rate of source channel;
102) according to source channel ACS set, destination channel ACS set and user determine the AMR initial rate of user on destination channel in the upstream rate of source channel;
103) with the AMR initial rate notice upper-layer subsystem of user on destination channel that calculates;
104) upper-layer subsystem is passed through the signaling user with this AMR initial rate.
As shown in Figure 2, a kind of embodiment of the initial rate of calculating user on destination channel is:
Add up to the common factor of calculating two speed set according to destination channel ACS speed set of knowing and source channel ACS rate set, if common AC S speed set (common factor is promptly arranged) is arranged, judge the user in the upstream rate of source channel whether in this occurs simultaneously, if in this occurs simultaneously, then the initial rate of user on destination channel then continued to use the upstream rate of user at the source channel, otherwise in select occuring simultaneously with the user in the speed of the speed difference minimum (absolute value minimum) of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.If do not occur simultaneously, then handle according to the regulation of standard agreement, add up to the up initial rate of calculation destination channel according to ICMI (indication of initial code pattern) in the pre-switch notice and destination channel ACS rate set.When ICMI is 0, select initial rate by the agreement regulation, if in the ACS set 4 kinds of speed are arranged, then initial rate is in the set low rate, otherwise is minimum speed limit; When ICMI be 1 get activate in the signaling with the value (ICMI and startmode all are configurable parameters) of startmode field.
The another kind of embodiment that calculates the initial rate of user on destination channel is:
Judge the user in the upstream rate of source channel whether in the set of destination channel ACS speed, if, then the initial rate of user on destination channel then continued to use the upstream rate of user at the source channel; If do not exist, then choose in the destination channel ACS speed set and the speed of user in the upstream rate difference minimum (absolute value minimum) of source channel, check this speed whether in the set of source channel ACS speed, if exist, then choose this speed as the user at the AMR of destination channel initial rate; If do not exist, then choose in the destination channel ACS speed set speed at the upstream rate difference of source channel time little (absolute value time little) with the user, check this speed whether in the set of source channel ACS speed, if exist, then choose this speed as the user at the AMR of destination channel initial rate; Otherwise circulation is carried out successively, and all speed is all calculated and finished in the set of destination channel ACS speed.If have the identical a plurality of speed of absolute value and all in source channel ACS speed set, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
Be example with the gsm system below, when terminal switches and source channel and destination channel all to use the AMR voice coding modes further to set forth
Embodiment 2
1) as shown in Figure 3, before system is about to switch, source base station can be received the pre-switch notice (Pre Handover Notification) that base station controller BSC (Base Station Controller) sends, and source base station can obtain destination channel ACS set in the pre-switch notice signaling.
2) source base station can be known user's source channel ACS speed set and the user upstream rate at the source channel by the source base station internal system.
3) source base station adds up to the common factor of calculating two speed set according to destination channel ACS speed set of knowing and source channel ACS rate set, if common AC S speed set (common factor is promptly arranged) is arranged, judge the user in the upstream rate of source channel whether in this occurs simultaneously, if in this occurs simultaneously, then the initial rate of user on destination channel then continued to use the upstream rate of user at the source channel, otherwise in select occuring simultaneously with the user in the speed of the speed difference minimum (absolute value minimum) of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.If do not occur simultaneously, then according to the agreement predetermined processing.
4) calculating the user behind the AMR of destination channel initial rate, source base station informing base station controller user is at the AMR of destination channel initial rate, and source base station can be replied signaling (Pre Handover Notification ACK) and notifies BSC by increasing a pre-switch notice newly.
5) BSC notifies user with the user at the AMR of destination channel initial rate by switching command
6) user uses during to destination channel the speed of notifying in the switching command to carry out the transmission of user-plane voice data as initial rate at successful switch.
Embodiment 3
1) base station controller obtains source channel ACS set, and destination channel ACS set and user are in the upstream rate of source channel.The obtain manner of base station controller is more, can be that source base station passes through newly-increased signaled base station controller with set of source channel ACS speed and user in the upstream rate of source channel; Also can be base station controller when the upstream rate of distributing source channel ACS set, destination channel ACS set and user, in base station controller, note the numerical value of distribution at the source channel.
2) base station controller is gathered according to known target channel ACS speed, calculate the common factor of set of destination channel ACS speed and the set of source channel ACS speed, if common AC S speed set (common factor is promptly arranged) is arranged, judge the user in the upstream rate of source channel whether in this occurs simultaneously, if in this occurs simultaneously, then the initial rate of user on destination channel then continued to use the upstream rate of user at the source channel, otherwise in select occuring simultaneously with the user in the speed of the speed difference minimum (absolute value minimum) of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.If do not occur simultaneously, then according to the agreement predetermined processing.
3) BSC notifies the user by switching command with the initial rate of ownership goal channel
4) user uses during to destination channel the speed of notifying in the switching command to carry out the transmission of user-plane voice data as initial rate at successful switch.
Embodiment 4
A kind of device of the AMR of adjustment initial rate comprises:
Acquisition module is used to obtain source channel activation rate set A CS, destination channel activation rate set A CS and the user upstream rate at the source channel;
Computing module is used for determining that in the upstream rate of source channel the user is at the AMR of destination channel initial rate according to described source channel ACS, destination channel ACS and user;
Notification module is used for using described user at the AMR of destination channel initial rate by the described user of signaled.
Described computing module, specifically be used to calculate the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
Embodiment 5
A kind of system that adjusts the AMR initial rate, comprise base station controller and base station, base station controller is informed the base station with destination channel activation rate set A CS, the base station determines that in the upstream rate of source channel the user is at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, and described user informed described base station controller at the AMR of destination channel initial rate, described base station controller uses described user at the AMR of destination channel initial rate by the described user of signaled.
Described base station determines that in the upstream rate of source channel the user is specially at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, calculate the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
Embodiment 6
A kind of system that adjusts the AMR initial rate, comprise base station controller and base station, the base station is informed base station controller with source channel activation rate set A CS and user in the upstream rate of source channel, base station controller is determined the user at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known in the upstream rate of source channel, and uses described user to inform the user at the AMR of destination channel initial rate by the described user of signaled.
Base station controller determines that in the upstream rate of source channel the user is specially at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, calculate the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
The design sketch that the AMR of accompanying drawing 4 and accompanying drawing 5 switches the speed adjustment of (Handover) front and back compares explanation.The ACS of this routine Central Plains channel destination channel gathers identical and constitutes by 4 kinds of speed.Accompanying drawing 4 is the user uplink speed after the method initialization switching of stipulating according to agreement in the existing system, and accompanying drawing 5 is for using the effect after the present invention is switched.User uplink speed before and after wherein thicker lines representative is switched is not difficult to find out that from two process contrasts use method of the present invention can seamlessly transit the speed before and after switching, thereby is improved the voice quality when switching.
The all or part of step that the one of ordinary skill in the art will appreciate that the foregoing description program circuit that can use a computer is realized, computer program can be stored in the computer-readable recording medium, computer program (as system, unit, device etc.) on the relevant hardware platform is carried out, when carrying out, comprise one of step or its combination of method embodiment.
Alternatively, all or part of step of the foregoing description also can use integrated circuit to realize, these steps can be made into integrated circuit modules one by one respectively, perhaps a plurality of modules in them or step is made into the single integrated circuit module and realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
Each device/functional module/functional unit in the foregoing description can adopt the general calculation device to realize, they can concentrate on the single calculation element, also can be distributed on the network that a plurality of calculation element forms.
Each device/functional module/functional unit in the foregoing description is realized with the form of software function module and during as independently production marketing or use, can be stored in the computer read/write memory medium.The above-mentioned computer read/write memory medium of mentioning can be a read-only memory, disk or CD etc.
Claims (10)
1. method of adjusting the AMR initial rate, it is characterized in that, obtain source channel activation rate set A CS, destination channel activation rate set A CS and user upstream rate at the source channel, determine the user at the AMR of destination channel initial rate according to described source channel ACS, destination channel ACS and user in the upstream rate of source channel, use described user at the AMR of destination channel initial rate by the described user of signaled.
2. the method for claim 1, it is characterized in that, determine that in the upstream rate of source channel the user is at the AMR of destination channel initial rate according to described source channel ACS, destination channel ACS and user, be specially: the common factor that calculates described source channel ACS and described destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
3. method as claimed in claim 1 or 2 is characterized in that, the described destination channel ACS that obtains is specially: the source base station controller is informed source base station by the pre-switch notice with described destination channel ACS;
Describedly use described user at the AMR of destination channel initial rate by the described user of signaled, be specially: described source base station determines that the user is behind the AMR of destination channel initial rate, reply by pre-switch notice described user is informed the source base station controller at the AMR of destination channel initial rate, the source base station controller is informed user with described user at the AMR of destination channel initial rate by switching command.
4. method as claimed in claim 1 or 2, it is characterized in that, describedly obtain source channel ACS and user in the upstream rate of source channel, be specially: source base station is replied by the pre-switch notice described source channel ACS and user is informed the source base station controller in the upstream rate of source channel;
Describedly use described user at the AMR of destination channel initial rate by the described user of signaled, be specially: described source base station controller is determined the user behind the AMR of destination channel initial rate, and the source base station controller is informed user with described user at the AMR of destination channel initial rate by switching command.
5. a device of adjusting the AMR initial rate is characterized in that, comprising:
Acquisition module is used to obtain source channel activation rate set A CS, destination channel activation rate set A CS and the user upstream rate at the source channel;
Computing module is used for determining that in the upstream rate of source channel the user is at the AMR of destination channel initial rate according to described source channel ACS, destination channel ACS and user;
Notification module is used for using described user at the AMR of destination channel initial rate by the described user of signaled.
6. device as claimed in claim 6, it is characterized in that, described computing module, specifically be used to calculate the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
7. system that adjusts the AMR initial rate, comprise base station controller and base station, it is characterized in that, base station controller is informed the base station with destination channel activation rate set A CS, the base station is according to the source channel activation rate set A CS of knowing, destination channel activation rate set A CS and user determine that in the upstream rate of source channel the user is at the AMR of destination channel initial rate, and described user informed described base station controller at the AMR of destination channel initial rate, described base station controller uses described user at the AMR of destination channel initial rate by the described user of signaled.
8. system as claimed in claim 8, it is characterized in that, described base station determines that in the upstream rate of source channel the user is specially at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, calculate the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
9. system that adjusts the AMR initial rate, comprise base station controller and base station, it is characterized in that, the base station is informed base station controller with source channel activation rate set A CS and user in the upstream rate of source channel, base station controller is determined the user at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known in the upstream rate of source channel, and uses described user to inform the user at the AMR of destination channel initial rate by the described user of signaled.
10. system as claimed in claim 10, it is characterized in that, base station controller determines that in the upstream rate of source channel the user is specially at the AMR of destination channel initial rate according to source channel activation rate set A CS, destination channel activation rate set A CS and the user known, calculate the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, then choose in the common factor with the user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as the user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, then choose the lower speed of speed as the user at the AMR of destination channel initial rate.
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| CN102665242A (en) * | 2012-05-28 | 2012-09-12 | 鼎桥通信技术有限公司 | Method and equipment for selecting AMR (adaptive multi-rate) speech coding rate during initial access |
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| WO2003019847A1 (en) * | 2001-08-27 | 2003-03-06 | Nokia Corporation | A method and a system for transfering amr signaling frames on halfrate channels |
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