CN102255686B - 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 adjusting AMR initial rate in the situation such as switch.
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 to doing between power system capacity and voice quality, 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 if make it also can keep certain voice quality under extremely severe propagation conditions.If instead channel quality is relatively good, at this moment just can increase speech coding part, obtain better voice quality.
When existing system is used AMR voice encoding and decoding mode to carry out channel switching, the AMR initial rate of user in destination channel obtains by switching command, and the initial rate of indicating in switching command is the fixed configurations of backstage parameter, in the time of cannot occurring according to switching, user carries out Dynamic Selection in the upstream rate of source channel.Will cause so the non-essential adjustment of speed, even can cause the adjustment of bypassing the immediate leadership of user rate, adjusting former and later two speed is not the adjacent speed in activation rate set (ACS, Active Codec Set).This kind of situation can affect the quality of voice, affects the measurement result of wireless quality, 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 prior art the not good problem of voice quality after 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 in the upstream rate of source channel, according to source channel ACS, destination channel ACS and user, in the upstream rate of source channel, determine that user is at the AMR of destination channel initial rate, by signaled user user at the AMR of destination channel initial rate.
Further, according to source channel ACS, destination channel ACS and user, in the upstream rate of source channel, determine that user is at the AMR of destination channel initial rate, be specially: the common factor that calculates source channel ACS and destination channel ACS, if exist to occur simultaneously, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
Further, obtain destination channel ACS, be specially: source base station controller is notified destination channel ACS is informed to source base station by pre-switch;
By signaled user user at the AMR of destination channel initial rate, be specially: source base station determines that user is after the AMR of destination channel initial rate, by pre-switch, notify to reply user is informed to source base station controller at the AMR of destination channel initial rate, source base station controller is informed user by 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 notified to reply by pre-switch source channel ACS and user are informed to source base station controller in the upstream rate of source channel;
By signaled user user at the AMR of destination channel initial rate, be specially: source base station controller determines that user is after the AMR of destination channel initial rate, and source base station controller is informed user by 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, for obtaining source channel activation rate set A CS, destination channel activation rate set A CS and user in the upstream rate of source channel;
Computing module, for determining that in the upstream rate of source channel user is at the AMR of destination channel initial rate according to source channel ACS, destination channel ACS and user;
Notification module, for passing through signaled user user at the AMR of destination channel initial rate.
Further, computing module, specifically for calculating the common factor of source channel ACS and destination channel ACS, if exist, occur simultaneously, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as 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 base station by destination channel activation rate set A CS, base station determines that in the upstream rate of source channel 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 user is informed to base station controller at the AMR of destination channel initial rate, base station controller passes through signaled user user at the AMR of destination channel initial rate.
Further, base station determines that in the upstream rate of source channel 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, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
According to another aspect of the present invention, a kind of system of adjusting AMR initial rate, comprise base station controller and base station, base station is informed base station controller by source channel activation rate set A CS and user in the upstream rate of source channel, base station controller determines that in the upstream rate of source channel 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 at the AMR of destination channel initial rate, informs user by signaled user user.
Further, base station controller determines that in the upstream rate of source channel 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, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as 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 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.
Accompanying drawing explanation
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 in destination channel;
Fig. 3 adjusts AMR initial rate flow chart in a switching flow of the present invention;
Fig. 4 is that in existing system switching flow, AMR initial rate is adjusted design sketch;
Fig. 5 is used AMR initial rate in switching flow of the present invention to adjust design sketch.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
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 in destination channel in the upstream rate of source channel;
103) notice of the AMR initial rate in the destination channel upper-layer subsystem by the user who calculates;
104) upper-layer subsystem is passed through signaling user by this AMR initial rate.
As shown in Figure 2, a kind of embodiment of the initial rate of calculating user in destination channel is:
According to the destination channel ACS speed set of knowing and source channel ACS rate set, add up to the common factor of calculating two speed set, if there is common AC S speed set (having common factor), judge user in the upstream rate of source channel whether within this occurs simultaneously, if within this occurs simultaneously, the initial rate of user in destination channel continued to use user in the upstream rate of source channel, otherwise in select occuring simultaneously with user in the speed of the speed difference of the upstream rate of source channel minimum (absolute value is minimum) as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.If do not occured simultaneously, according to the regulation of standard agreement, process, according to the ICMI (indication of initial code pattern) in pre-switch notice and destination channel ACS rate set, add up to the up initial rate of calculation destination channel.When ICMI is 0, by agreement regulation, select initial rate, if having 4 kinds of speed in ACS set, initial rate is in set low rate, otherwise is minimum speed limit; When ICMI be 1 get activate in signaling with the value (ICMI and startmode are all configurable parameters) of startmode field.
The another kind of embodiment that calculates the initial rate of user in destination channel is:
Judge user in the upstream rate of source channel whether in the set of destination channel ACS speed, if, the initial rate of user in destination channel continued to use user in the upstream rate of source channel; If do not exist, choose in the set of destination channel ACS speed the speed at the upstream rate difference of source channel minimum (absolute value is minimum) with user, check that this speed is whether in the channel ACS speed set of source, if exist, choose this speed as user at the AMR of destination channel initial rate; If do not exist, choose in the set of destination channel ACS speed the speed at the upstream rate difference of source channel time little (absolute value time little) with user, check that this speed is whether in the channel ACS speed set of source, if exist, choose this speed as user at the AMR of destination channel initial rate; Otherwise loop successively, until in the set of destination channel ACS speed, all speed is all calculated complete.A plurality of speed that absolute value is identical if exist and all in the channel ACS speed set of source, choose speed that speed is lower as user at the AMR of destination channel initial rate.
Gsm system take below as example, when terminal switches and source channel and destination channel all to use AMR voice coding modes to be further elaborated
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 from pre-switch notice signaling.
2) source base station can know that by source base station internal system user's source channel ACS speed set and user are in the upstream rate of source channel.
3) source base station adds up to the common factor of calculating two speed set according to the destination channel ACS speed set of knowing and source channel ACS rate set, if there is common AC S speed set (having common factor), judge user in the upstream rate of source channel whether within this occurs simultaneously, if within this occurs simultaneously, the initial rate of user in destination channel continued to use user in the upstream rate of source channel, otherwise in select occuring simultaneously with user in the speed of the speed difference of the upstream rate of source channel minimum (absolute value is minimum) as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.If do not occured simultaneously, according to agreement predetermined processing.
4) calculating user after 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 being newly increased a pre-switch notice.
5) BSC notifies user by user at the AMR of destination channel initial rate by switching command
6) speed that user notifies in successful switch is used switching command during to destination channel is carried out the transmission of user-plane voice data as initial rate.
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 by source channel ACS speed set 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 at source channel, in base station controller, record the numerical value of distribution.
2) base station controller is according to known destination channel ACS speed set, calculate the common factor of destination channel ACS speed set and source channel ACS speed set, if there is common AC S speed set (having common factor), judge user in the upstream rate of source channel whether within this occurs simultaneously, if within this occurs simultaneously, the initial rate of user in destination channel continued to use user in the upstream rate of source channel, otherwise in select occuring simultaneously with user in the speed of the speed difference of the upstream rate of source channel minimum (absolute value is minimum) as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.If do not occured simultaneously, according to agreement predetermined processing.
3) BSC notifies user by switching command by the initial rate of ownership goal channel
4) speed that user notifies in successful switch is used switching command during to destination channel is carried out the transmission of user-plane voice data as initial rate.
Embodiment 4
A kind of device of the AMR of adjustment initial rate comprises:
Acquisition module, for obtaining source channel activation rate set A CS, destination channel activation rate set A CS and user in the upstream rate of source channel;
Computing module, for determining that in the upstream rate of source channel user is at the AMR of destination channel initial rate according to described source channel ACS, destination channel ACS and user;
Notification module, for being used described user at the AMR of destination channel initial rate by user described in signaled.
Described computing module, specifically for calculating the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
Embodiment 5
A kind of system of adjusting AMR initial rate, comprise base station controller and base station, base station controller is informed base station by destination channel activation rate set A CS, base station determines that in the upstream rate of source channel 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 is informed to 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 user described in signaled.
Described base station determines that in the upstream rate of source channel 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, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
Embodiment 6
A kind of system of adjusting AMR initial rate, comprise base station controller and base station, base station is informed base station controller by source channel activation rate set A CS and user in the upstream rate of source channel, base station controller determines that in the upstream rate of source channel 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 uses described user to inform user at the AMR of destination channel initial rate by user described in signaled.
Base station controller determines that in the upstream rate of source channel 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, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as 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 carries out comparative illustration.The ACS of this routine Central Plains channel destination channel gathers identical and forms by 4 kinds of speed.Accompanying drawing 4 is the user uplink speed after switching according to the method initialization of agreement regulation in existing system, and accompanying drawing 5 is for being used the effect after the present invention is switched.Wherein the user uplink speed before and after thicker lines representative switching, is not difficult to find out and uses method of the present invention that the speed of switching front and back can be seamlessly transitted from two processes contrasts, thereby improve the voice quality while switching.
The all or part of step that one of ordinary skill in the art will appreciate that above-described embodiment can realize by computer program flow process, computer program can be stored in a computer-readable recording medium, computer program (as system, unit, device etc.) on corresponding hardware platform is carried out, when carrying out, comprise step of embodiment of the method one or a combination set of.
Alternatively, all or part of step of above-described embodiment also can realize with integrated circuit, and these steps can be made into respectively integrated circuit modules one by one, or a plurality of modules in them or step are made into single integrated circuit module realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Each device/functional module/functional unit in above-described embodiment can adopt general calculation element to realize, and they can concentrate on single calculation element, also can be distributed on the network that a plurality of calculation elements form.
The form of software function module of usining each device/functional module/functional unit in above-described embodiment realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.The above-mentioned computer read/write memory medium of mentioning can be read-only memory, disk or CD etc.
Claims (6)
1. a method of adjusting self-adaption multi-speed encoding/decoding 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 in the upstream rate of source channel, according to described source channel ACS, destination channel ACS and user, in the upstream rate of source channel, determine that user is at the AMR of destination channel initial rate, by user described in signaled, use described 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, determine that user is at the AMR of destination channel initial rate, be specially: the common factor that calculates described source channel ACS and described destination channel ACS, if exist to occur simultaneously, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
2. the method for claim 1, is characterized in that, described in obtain destination channel ACS, be specially: source base station controller is notified described destination channel ACS is informed to source base station by pre-switch;
Describedly by user described in signaled, use described user at the AMR of destination channel initial rate, be specially: described source base station determines that user is after the AMR of destination channel initial rate, by pre-switch, notify to reply described user is informed to source base station controller at the AMR of destination channel initial rate, source base station controller is informed user by described user at the AMR of destination channel initial rate by switching command.
3. the method for claim 1, 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 notified to reply by pre-switch described source channel ACS and user are informed to source base station controller in the upstream rate of source channel;
Describedly by user described in signaled, use described user at the AMR of destination channel initial rate, be specially: described source base station controller determines that user is after the AMR of destination channel initial rate, and source base station controller is informed user by described user at the AMR of destination channel initial rate by switching command.
4. a device of adjusting self-adaption multi-speed encoding/decoding AMR initial rate, is characterized in that, comprising:
Acquisition module, for obtaining source channel activation rate set A CS, destination channel activation rate set A CS and user in the upstream rate of source channel;
Computing module, for determining that in the upstream rate of source channel user is at the AMR of destination channel initial rate according to described source channel ACS, destination channel ACS and user;
Notification module, for being used described user at the AMR of destination channel initial rate by user described in signaled;
Described computing module, specifically for calculating the common factor of described source channel ACS and described destination channel ACS, if exist to occur simultaneously, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
5. a system of adjusting self-adaption multi-speed encoding/decoding AMR initial rate, comprise base station controller and base station, it is characterized in that, base station controller is informed base station by destination channel activation rate set A CS, 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 user is at the AMR of destination channel initial rate, and described user is informed to 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 user described in signaled,
Described base station determines that in the upstream rate of source channel 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, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
6. a system of adjusting self-adaption multi-speed encoding/decoding AMR initial rate, comprise base station controller and base station, it is characterized in that, base station is informed base station controller by source channel activation rate set A CS and user in the upstream rate of source channel, base station controller determines that in the upstream rate of source channel 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 uses described user to inform user at the AMR of destination channel initial rate by user described in signaled;
Base station controller determines that in the upstream rate of source channel 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, choose in common factor with user in the speed of the absolute value minimum of the speed difference of the upstream rate of source channel as user at the AMR of destination channel initial rate; If there is the speed of a plurality of absolute value minimums, choose speed that speed is lower as user at the AMR of destination channel initial rate.
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