CN101437282B - Method and apparatus for controlling external loop power of combined business - Google Patents

Method and apparatus for controlling external loop power of combined business Download PDF

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CN101437282B
CN101437282B CN2008102398605A CN200810239860A CN101437282B CN 101437282 B CN101437282 B CN 101437282B CN 2008102398605 A CN2008102398605 A CN 2008102398605A CN 200810239860 A CN200810239860 A CN 200810239860A CN 101437282 B CN101437282 B CN 101437282B
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sir
target
channel
service
target sir
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CN101437282A (en
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张文传
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Potevio Information Technology Co Ltd
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Potevio Institute of Technology Co Ltd
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Abstract

The invention discloses a method for outer-loop power control of integrated services. The method carries out step A to step C of the following steps for a corresponding communication channel of each service of the integrated services: A, calculating a long term statistical service quality value of a communication channel according to verification results of data received in recent period by the communication channel; B, estimating short-term service quality of the communication channel according to the verification results of data received currently by the communication channel and a target service quality value and determining a short-term adjustment mode of the target SIR of the communication channel; C, determining a long-term adjustment mode of the target SIR of the communication channel according to the long-term statistical service quality value of the communication channel, the short-term adjustment mode and the target service quality value; and D, adjusting a target SIR of theintegrated services according to the long-term adjustment mode, the permitted adjustment ranges of the target SIR of the integrated services. The invention also discloses a device for the outer-loop power control of the integrated services. The method and the device can effectively improve performance of outer-loop power control with relatively low implementation complexity.

Description

A kind of method and device that composite service is carried out exterior ring power control
Technical field
The present invention relates to the power control techniques in the wireless communication system, particularly a kind of method and device that composite service is carried out exterior ring power control.
Background technology
Code division multiple access (CDMA) communication system is a code-division multiplexing system, a user to transmit for intrasystem other user be to disturb.In order to make system reach heap(ed) capacity, need each user satisfying under the condition of quality of service with the minimum power emission, need the data transmit leg is carried out power control for this reason.
Power control is divided into open Loop Power control and closed power control.Wherein, open Loop Power control determines that according to path loss physical channel sends the power of data for the first time; Closed power control is finished jointly by exterior ring power control and inner loop power control.
Inner loop power control is measured signal interference ratio (SIR) by receiving terminal, and will measure SIR with target SIR compares, if measure SIR＞target SIR, just requires transmit leg reduction transmitted power by power adjustment commands (TPC); If measure SIR＜target SIR, just require transmit leg to improve transmitted power by TPC.
Exterior ring power control is provided with the target SIR of inner loop power control, to reach the BLER that satisfies business need according to the Block Error Rate (BLER) and the BLER that measures of business need.
Fig. 1 shows the schematic diagram of existing closed power control.Inner loop power control can overcome multipath, decline and user and move the variation that causes link-quality, guarantees that the receiving terminal SIR of communication link is consistent with the target SIR that outer shroud is provided with.Equipment makes professional BLER satisfy the requirement that system is provided with by the target SIR of exterior ring power control adjustment inner loop power control, thus the quality of assurance communication.
The composite service of 3G system is meant a plurality of service integrations on same physical channel, and the power of these professional data when physical channel sends is identical.Exterior ring power control needs to adjust the interior ring target SIR of this physical channel, and the requirement of multiplexing a plurality of business on same physical channel all is met.
There is following several method of composite service being carried out exterior ring power control in the prior art:
Existing scheme 1: take all factors into consideration the QoS of two kinds of business in the composite service and the deviation of its desired value, always the controlling object of controlling as power with the poorest business of QoS.
Existing scheme 2: at first, select the reference transmission channel of a transmission channel as exterior ring power control; After the exterior ring power control convergence of reference transmission channel, judge whether other professional service quality are met; If other professional service quality all near or be better than the correspondence quality target value, then the reference transmission channel remains unchanged; If there is the service quality of one or more business to be lower than corresponding quality target value in other business, then be lower than in the business of corresponding mass desired value in all service quality, the professional corresponding channel of selecting actual mass and aimed quality disparity is as new reference transmission channel, use new reference transmission channel to carry out exterior ring power control, so circulation, up to the service quality of every other business all near or be better than the quality target value of correspondence.
Existing scheme 3: measure each the professional BLER in the described composite service respectively, and use the result who measures to compare with each professional target BLER respectively; Adjust each professional sir target value according to result relatively, and adjusted sir target value is set at the new sir target value of each business; The new sir target value of more described each business is selected a maximum sir target value; The sir target value of described maximum sir target value and exterior ring power control one-period of lasting is compared, according to result relatively the sir target value is adjusted, and adjusted value is controlled new sir target value as exterior ring power.
Existing scheme 4: according to the priority of the exterior ring power control of the height definition miscellaneous service of the required sir target value of business, professional required sir target value requires high more, and its priority is high more; Every kind of business produces target SIR adjustment order separately according to received received signal quality and quality of service desired value; All received professional target SIR adjustment orders are merged processing, produce final objective SIR and adjust order.
Above-mentioned existing scheme 1～3 needs assessment is different business/propagation channel quality relatively, carries out the selection of channel control then, and in the process of control channel conversion, saltus step can take place the possibility of result of outer shroud output, causes the scope of target SIR fluctuation big.In addition, the switching of a plurality of interchannels can influence the stability of outer shroud control, and implementation complexity is higher simultaneously.
There is following shortcoming in above-mentioned existing scheme 4:
1) mistake of Radio Link has sudden, this scheme adopts and receives the principle of making control immediately after the data block, therefore, burst error can cause this scheme to improve target SIR immediately, and then cause under the situation that quality of service has been met, receiving terminal improves target SIR, finally makes transmitting terminal power improve.The raising that transmitting terminal power is unnecessary can increase the interference to other user, reduces the capacity of system, can increase the power consumption of equipment simultaneously.
2) two mutual couplings of interchannel of this conceptual design, so, after a channel adjustment target SIR, one other channel is follow-up will adjust target SIR in the opposite direction, thereby cause the fluctuation of target SIR difference bigger, and the complexity of Shi Xianing is higher simultaneously.
3) this conceptual design need be known the SIR of channel correspondence when satisfying quality of service in advance, because professional composite type kind is a lot, and the setting of each professional BLER/ frame error rate (FER) is not unalterable, and therefore, the practicality of this scheme is relatively poor.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and device that composite service is carried out exterior ring power control, with the performance of raising exterior ring power control, and reduces the implementation complexity that exterior ring power is controlled.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of method that composite service is carried out exterior ring power control comprises:
To each professional corresponding channel in the described composite service, execution in step A～C:
A, according to the check results of the data that receive in the nearest one section Preset Time of this channel, calculate the long-time statistical quality of service value of this channel;
B, according to the check results of the current reception data of this channel and the quality of service desired value of this channel, assess the short period service mass value of this channel, and determine the short-term correction mode of this channel target signal interference ratio SIR according to the short period service mass value of described channel;
C, the long-time statistical quality of service value according to this channel, the short-term correction mode of this channel target SIR and the quality of service desired value of this channel are determined the long-run adjustment mode of this channel target SIR;
D, allow the scope adjusted, adjust the target SIR of described composite service according to the target SIR of the long-run adjustment mode of the target SIR of described definite each channel and described composite service.
Preferably, described reception data are unit with the data block, and the quality of service value of described channel represents that with block error rate BLER described quality of service desired value is target BLER;
Perhaps, described reception data are unit with the Frame, and the quality of service value of described channel represents that with frame error rate FER described quality of service desired value is target FER.
Preferably, described steps A can comprise:
A1, receive data i at each logical value x (i) is set;
A2, correct if receive the CRC CRC check of data i then puts x (i)=0, if receive the CRC check mistake of data i, then puts x (i)=1;
A3, basis N error = Σ i = - N 0 x ( n + 1 ) The misdata sum that receives in the nearest one section Preset Time of calculating channel; Wherein:
N ErrorRepresent the misdata sum that receives in nearest one section Preset Time;
N represents the number of reception data corresponding in the described Preset Time;
N represents the sequence number of current reception data;
A4, with N Error/ N is as the long-time statistical quality of service value of channel.
Described step B can comprise:
B1, short-term channel quality of service measurement index Ashort and short period service quality threshold M are set; The initial value of putting Ashort is 0;
B2, correct as if the CRC check of current reception data then puts Ashort=Ashort-S Target, if the CRC check mistake of current reception data is then put Ashort=Ashort+S Target, wherein, S TargetThe quality of service desired value of representing this channel;
B3, determine the short-term correction mode of this channel target SIR according to the scope of Ashort:
If | Ashort|＜M, then the short-term correction mode with this channel target SIR is defined as not adjusting target SIR;
If Ashort＜-M, then the short-term correction mode with this channel target SIR is defined as reducing target SIR, puts Ashort=Ashort+M simultaneously;
If Ashort＞M, then the short-term correction mode with this channel target SIR is defined as raising target SIR, puts Ashort=Ashort-M simultaneously.
Preferably, the short-term correction mode of described channel target SIR can comprise: raise target SIR, downward modulation target SIR and do not adjust target SIR;
Described step C can comprise:
If the short-term correction mode of this channel target SIR is downward modulation target SIR and long-time statistical quality of service value＜quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as reducing target SIR;
If the short-term correction mode of this channel target SIR is downward modulation target SIR and long-time statistical quality of service value＞quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as not adjusting target SIR;
If the short-term correction mode of this channel target SIR is for raising target SIR and long-time statistical quality of service value＞quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as raising target SIR;
If the short-term correction mode of this channel target SIR is for raising target SIR and long-time statistical quality of service value＜quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as not adjusting target SIR.
Preferably, the long-run adjustment mode of described channel target SIR can comprise: raise target SIR, downward modulation target SIR and do not adjust target SIR;
Described step D can comprise:
D1, to establish current goal SIR be SIR Target, the target SIR permission adjustment upper limit SIR that SIR adjusts step-length δ, described composite service is set MaxAllow to adjust lower limit SIR with target SIR Min
D2, according to the long-run adjustment mode of described definite each channel, if described long-run adjustment mode is then put SIR for raising target SIR Target=SIR Target+ δ is if described long-run adjustment mode is then put SIR for the downward modulation target SIR Target=SIR Target-δ;
D3, if SIR Min＞SIR Target, then the target SIR with described composite service is adjusted into SIR Min, SIR is set simultaneously Target=SIR MinIf SIR Max＜SIR Target, then the target SIR with described composite service is adjusted into SIR Max, SIR is set simultaneously Target=SIR MaxOtherwise, the target SIR of described composite service is adjusted into SIR Target
A kind of device that composite service is carried out exterior ring power control comprises: SIR adjusts control module and controls branch road at each professional corresponding set exterior ring power of channel in the described composite service;
The input signal of described each exterior ring power control branch road is that reception data, the output signal of its respective channels is the target SIR long-run adjustment request of its respective channels, and described target SIR long-run adjustment request sends to described SIR and adjusts control module;
Comprise in described each exterior ring power control branch road: channel measurement module, short-term correction module and long-term control module, wherein:
Described channel measurement module is controlled the input signal of branch road as input signal with described exterior ring power, be used for check results according to the data that receive in the nearest one section Preset Time of its respective channels, calculate the long-time statistical quality of service value of this channel, described long-time statistical quality of service value is sent to described long-term control module;
Described short-term correction module is controlled the input signal of branch road as input signal with described exterior ring power, be used for according to the check results of the current reception data of its respective channels and the quality of service desired value of this channel, assess the short period service quality of this channel, and send the short-term correction request of this channel target SIR according to the short period service quality of described channel to described long-term control module;
Described long-term control module be used for according to from the long-time statistical quality of service value of channel measurement module, from the short-term correction request of the channel target SIR of short-term correction module, with and the quality of service desired value of respective channels, adjust the target SIR long-run adjustment request that control module is exported its respective channels to SIR;
Described SIR adjustment control module is used for allowing according to the target SIR of the target SIR long-run adjustment request of described each channel and described composite service the scope of adjustment, adjusts the target SIR of described composite service.
Preferably, the input signal of described each exterior ring power control branch road can be unit with the data block, and described short-term correction module and long-term control module can be with the target BLER of its respective channels as the quality of service desired values;
Perhaps, the input signal of described each exterior ring power control branch road can be unit with the Frame, and described short-term correction module and long-term control module can be with the target FER of its respective channels as the quality of service desired values.
Preferably, described channel measurement module can be used for receiving data i at each logical value x (i) is set, and when the CRC CRC check that receives data i is correct, puts x (i)=0, when receiving the CRC check mistake of data i, puts x (i)=1; And according to N error = Σ i = - N 0 x ( n + i ) The misdata sum that receives in the nearest one section Preset Time of calculating channel; Wherein:
N ErrorRepresent the misdata sum that receives in nearest one section Preset Time;
N represents the number of reception data corresponding in the described Preset Time;
N represents the sequence number of current reception data;
And be used for N Error/ N is as the long-time statistical quality of service value of channel.
Described short-term correction module may further include: short-term channel quality evaluation unit and short-term correction control unit;
Described short-term channel quality evaluation unit is used for assessing the short period service quality of this channel according to the check results of the current reception data of its respective channels and the quality of service desired value of this channel;
Described short-term correction control unit is used for sending to described long-term control module according to the short period service quality of described channel the short-term correction request of this channel target SIR.
Described short-term channel quality evaluation unit can be used to be provided with short-term channel quality of service measurement index Ashort and short period service quality threshold M, and the initial value of putting Ashort is 0; And when the CRC check of current reception data is correct, put Ashort=Ashort-S Target, when the CRC check mistake of current reception data, put Ashort=Ashort+S Target, wherein, S TargetThe quality of service desired value of representing this channel;
Described short-term correction control unit can be used for sending to described long-term control module according to the scope of Ashort the short-term correction request of this channel target SIR:
When | Ashort|＜M, do not send the request of adjusting target SIR to the long-term control module;
Ashort＜-during M, send the short-term correction request of downward modulation target SIR to the long-term control module, put Ashort=Ashort+M simultaneously;
When Ashort＞M, send the short-term correction request of raising target SIR to the long-term control module, put Ashort=Ashort-M simultaneously.
Preferably, the short-term correction request that is received from the channel target SIR of short-term correction module of described long-term control module can comprise: raise the short-term correction request of target SIR and the short-term correction request of downward modulation target SIR;
Described long-term control module can be used for:
When receiving downward modulation short-term correction request of target SIR and long-time statistical quality of service value＜quality of service desired value, adjust the long-run adjustment request of control module output downward modulation target SIR to SIR;
When receiving downward modulation short-term correction request of target SIR and long-time statistical quality of service value＞quality of service desired value, do not adjust the request that target SIR is adjusted in control module output to SIR;
When receiving the short-term correction request of raising target SIR and long-time statistical quality of service value＞quality of service desired value, adjust the long-run adjustment request that target SIR is raised in control module output to SIR;
When receiving the short-term correction request of raising target SIR and long-time statistical quality of service value＜quality of service desired value, do not adjust the request that target SIR is adjusted in control module output to SIR.
Preferably, described SIR adjustment control module may further include: SIR adjustment unit and SIR control unit;
Described SIR adjustment unit is used for determining according to default adjustment step-length δ according to the target SIR long-run adjustment request of described each channel the adjusted value of target SIR;
Described SIR control unit is used for allowing according to the target SIR of described composite service the adjusted value of the target SIR that the scope adjusted and described SIR adjustment unit determine, adjusts the target SIR of described composite service.
Preferably, described long-term control module can comprise to the long-run adjustment request that SIR adjusts the channel target SIR of control module output: raise the long-run adjustment request of target SIR and the long-run adjustment request of downward modulation target SIR;
Described SIR adjustment unit can be used for when receiving the long-run adjustment request of raising target SIR, with SIR TargetBe adjusted into (SIR Target+ δ), when receiving the long-run adjustment request of downward modulation target SIR, with SIR TargetBe adjusted into (SIR Target-δ); Wherein, SIR TargetExpression current goal SIR;
Described SIR control unit can be used at SIR Min＞SIR TargetThe time, the target SIR of described composite service is adjusted into SIR Min, SIR is set simultaneously Target=SIR MinAt SIR Max＜SIR TargetThe time, the target SIR of described composite service is adjusted into SIR Max, SIR is set simultaneously Target=SIR MaxAt SIR Min＜SIR Target＜SIR MaxThe time, the target SIR of described composite service is adjusted into SIR TargetWherein, SIR MinThe target SIR of representing described composite service allows to adjust lower limit, SIR MaxThe target SIR of representing described composite service allows to adjust the upper limit.
As seen from the above technical solution, the present invention at first adopts short-term with the mode that combines for a long time each professional corresponding channel in the composite service independently to be carried out the assessment of quality of service, and draw the adjustment mode at each professional corresponding channel in the composite service, promptly determine it is to raise target SIR at each professional corresponding channel in the composite service, the downward modulation target SIR is not still adjusted target SIR, then, take all factors into consideration the adjustment mode of each channel, in the scope that the target SIR permission of composite service is adjusted, adjust the target SIR of described composite service, thereby effectively improved the performance of exterior ring power control.
Adopt technical scheme provided by the present invention that composite service is carried out exterior ring power control, can obtain following beneficial effect:
1) the present invention can realize the exterior ring power control to composite service, makes under the prerequisite that each professional quality all is met in the composite service transmitting power minimum of transmitting terminal.
2) the present invention can be that in the composite service one professional actual quality of service fluctuates near the quality of service desired value, and other professional actual quality of service is not more than the corresponding business quality target value.
3) because the present invention determines that to each professional corresponding channel in the composite service adjustment mode is independently to carry out, do not need the interactive information of a plurality of interchannels, therefore, realize simple.
4) the present invention need not to carry out at a plurality of interchannels the selection of outer shroud control, realizes simple.
5) the present invention does not need to know in advance in the composite service that a plurality of channels satisfy separately and concerns between the quality of service desired value and SIR, and is very convenient in actual applications.
6) the present invention has overcome the unnecessary adjustment to target SIR that the channel burst mistake causes, thereby has increased the stability of exterior ring power control.
As seen, use the present invention and can effectively improve the performance of exterior ring power control with lower implementation complexity.
Description of drawings
Fig. 1 shows the schematic diagram of existing closed power control;
Fig. 2 carries out the schematic flow sheet of the method for exterior ring power control to composite service for the present invention;
Fig. 3 is the detailed process signal that example shows step 202 shown in Figure 2～204 with BLER;
Fig. 4 carries out the composition structural representation of the device of exterior ring power control to composite service for the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Main thought of the present invention is at first to adopt short-term with the mode that combines for a long time each professional corresponding channel in the composite service independently to be carried out the assessment of quality of service, draw the adjustment mode at each professional corresponding channel in the composite service, then, take all factors into consideration the adjustment mode of each channel, in the scope that the target SIR permission of composite service is adjusted, adjust the target SIR of described composite service.
Fig. 2 carries out the schematic flow sheet of the method for exterior ring power control to composite service for the present invention.Referring to Fig. 2, this method is at first to each professional corresponding channel execution in step 201～203 in the composite service, and then in step 204, the execution result of taking all factors into consideration the step 203 of each channel is adjusted the target SIR of composite service.Particularly, this method comprises:
Step 201:, calculate the long-time statistical quality of service value of this channel according to the check results of the data that receive in the nearest one section Preset Time of this channel.
Step 202: according to the check results of the current reception data of this channel and the quality of service desired value of this channel, assess the short period service quality of this channel, and determine the short-term correction mode of this channel target signal interference ratio SIR according to the short period service quality of described channel.
Step 203:, determine the long-run adjustment mode of this channel target SIR according to the long-time statistical quality of service value of this channel, the short-term correction mode of this channel target SIR and the quality of service desired value of this channel.
Step 204: allow the scope adjusted according to the target SIR of the long-run adjustment mode of the target SIR of described definite each channel and described composite service, adjust the target SIR of described composite service.
So far, finish the present invention carries out exterior ring power control to composite service method.
In the present invention's method shown in Figure 2, described reception data can be unit with the data block, and at this moment, the quality of service of described channel represents that with BLER described quality of service desired value is target BLER.In actual applications, described reception data can be unit with the Frame also, and at this moment, the quality of service of described channel represents that with FER described quality of service desired value is target FER.
Step 201 shown in Figure 2 is to calculate the step of the long-time statistical quality of service value in the nearest one section Preset Time of each channel, when calculating described long-time statistical quality of service value, can carry out in the following manner:
The 1st step: receive data i at each logical value x (i) is set.Suppose that receiving data in this example is unit with the data block, then this step is that each data block is provided with logical value x (i).
The 2nd step: carry out CRC (CRC) verification to receiving data i,, then put x (i)=0,, then put x (i)=1 if receive the CRC check mistake of data i if it is correct to receive the CRC check of data i.Suppose in this example that receiving data is unit with the data block, then this step is that i data block carried out CRC check, and is x (i) assignment according to check results.
The 3rd step: according to N error = Σ i = - N 0 x ( n + i ) The misdata sum that receives in the nearest one section Preset Time of calculating channel; Wherein:
N ErrorRepresent the misdata sum that receives in nearest one section Preset Time;
N represents the number of reception data corresponding in the described Preset Time;
N represents the sequence number of current reception data.
The 4th step: with N Error/ N is as the long-time statistical quality of service value of channel.
In the aforementioned calculation method, be the long-time statistical quality of service that calculates this channel with all reception data that begin to receive in for the previous period from current time.In actual applications, the mode that can also take to sample is carried out, that is: the reception data that begin all reception data pick-up somes of receiving in for the previous period from current time according to certain sample frequency participate in the calculating of described long-time statistical quality of service.
Step 202 shown in Figure 2 is to determine the step of short-term correction mode of the target SIR of each channel, when specific implementation, can carry out in the following manner:
The 1st step: short-term channel quality of service measurement index Ashort and short period service quality threshold M are set.
Preferably, described Ashort initial value can be changed to 0, and the M initial value can be arranged in [5,10] interval and be provided with, and certainly, also can be set to other values according to the needs of actual application environment.
The 2nd step: the CRC check result according to current reception data carries out assignment to Ashort: if the CRC check of current reception data is correct, then put Ashort=Ashort-S Target, if the CRC check mistake of current reception data is then put Ashort=Ashort+S Target, wherein, S TargetThat is: all there is a S in the quality of service desired value of representing this channel at each channel TargetSuppose that receiving data in this example is unit with the data block, then this step is that i data block carried out CRC check, described S TargetThe target BLER that represents this channel.
The 3rd step: determine the short-term correction mode of this channel target SIR according to the scope of Ashort, particularly:
If | Ashort|＜M, show Ashort within rational fluctuation range, need not to adjust target SIR this moment, therefore, the short-term correction mode of this channel target SIR is defined as not adjusting target SIR;
If Ashort＜-M, it is correct to show that the CRC check result who receives data in nearest a period of time continues, make Ashort ease down to and be lower than threshold value M, at this moment, channel quality is better, should suitably reduce the transmitting power of transmitting terminal, therefore, with the short-term correction mode of this channel target SIR is the downward modulation target SIR, puts Ashort=Ashort+M simultaneously;
If Ashort＞M, show that the CRC check result who receives data in nearest a period of time continues mistake, make Ashort increase to and exceed threshold value M, at this moment, channel quality is relatively poor, should suitably increase the transmitting power of transmitting terminal, therefore, the short-term correction mode of this channel target SIR is defined as raising target SIR, puts Ashort=Ashort-M simultaneously.
Step 203 shown in Figure 2 is to determine the step of long-run adjustment mode of the target SIR of each channel, when specific implementation, can carry out in the following manner:
If the short-term correction mode of this channel target SIR is downward modulation target SIR and long-time statistical quality of service value＜quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as reducing target SIR;
If the short-term correction mode of this channel target SIR is downward modulation target SIR and long-time statistical quality of service value＞quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as not adjusting target SIR;
If the short-term correction mode of this channel target SIR is for raising target SIR and long-time statistical quality of service value＞quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as raising target SIR;
If the short-term correction mode of this channel target SIR is for raising target SIR and long-time statistical quality of service value＜quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as not adjusting target SIR.
The purpose of the long-run adjustment mode of the target SIR of definite each channel is in the manner described above: cause the unnecessary adjustment of target SIR in order to prevent the channel burst mistake.
Step 204 shown in Figure 2 is to determine the step of adjustment mode of the target SIR of composite service, when specific implementation, can carry out in the following manner:
The 1st step: establishing current goal SIR is SIR Target, the target SIR permission adjustment upper limit SIR that SIR adjusts step-length δ, described composite service is set MaxAllow to adjust lower limit SIR with target SIR Min
The 2nd step: according to the long-run adjustment mode of described definite each channel, if described long-run adjustment mode is then put SIR for raising target SIR Target=SIR Target+ δ is if described long-run adjustment mode is then put SIR for the downward modulation target SIR Target=SIR Target-δ;
The 3rd step: if SIR Min＞SIR Target, then the target SIR with described composite service is adjusted into SIR Min, SIR is set simultaneously Target=SIR MinIf SIR Max＜SIR Target, then the target SIR with described composite service is adjusted into SIR Max, SIR is set simultaneously Target=SIR MaxOtherwise, the target SIR of described composite service is adjusted into SIR Target
Fig. 3 is the detailed process signal that example shows step 202 shown in Figure 2～204 with BLER.Referring to Fig. 3, BLER shown in the figure TargetPromptly be to be the S of example with BLER Target, BLER RealPromptly be to be the long-time statistical quality of service value of example with BLER.This flow process of Fig. 3 comprises:
Step 301: receive i the data block on the dedicated channel.
In fact each professional corresponding channel is exactly at described each professional dedicated channel (DCH) in the composite service of the present invention, and in the following description, these dedicated channels are designated as: DCHi, wherein, i is the sequence number of DCH.
Step 302: whether the CRC check of judging the current data block that receives is correct, if correct, execution in step 303, otherwise, jump to step 304.
Step 303: put Ashort=Ashort-BLER Target, jump to step 305.
Step 304: put Ashort=Ashort+BLER Target
Step 305: whether the absolute value of judging Ashort less than M, if less than, then return step 301, otherwise, execution in step 306.
Step 306: whether judge Ashort greater than M, if greater than, then execution in step 307, otherwise jump to step 310.
Step 307: put Ashort=Ashort-M.
Step 308: judge BLER RealWhether less than BLER Target, if less than, then return step 301, otherwise, execution in step 309 continued.
Step 309: put SIR Target=SIR Target+ δ jumps to step 313.
Step 310: put Ashort=Ashort+M.
Step 311: judge whether BLER RealGreater than BLER Target, if, return step 301, otherwise, execution in step 312 continued.
Step 312: put SIR Target=SIR Target-δ.
Step 313: judge SIR TargetWhether less than SIR Min, if less than, then continue execution in step 314, otherwise, jump to step 315.
Step 314: put SIR Target=SIR Min, with SIR TargetExport to inner loop power control and use, return step 301.
Step 315: judge SIR TargetWhether greater than SIR Max, if greater than, then continue execution in step 316, otherwise, jump to step 317.
Step 316: put SIR Target=SIR Max, with SIR TargetExport to inner loop power control and use, return step 301.
Step 317: with SIR TargetExport to inner loop power control and use, return step 301.
So far, finish flow process shown in Figure 3.
Corresponding to the method that composite service is carried out exterior ring power control provided by the invention, the present invention also provides a kind of device that composite service is carried out exterior ring power control, describes below in conjunction with accompanying drawing.
Fig. 4 carries out the composition structural representation of the device of exterior ring power control to composite service for the present invention.Referring to Fig. 4, this device comprises: SIR adjusts control module 410 and controls branch road 420 at each professional corresponding set exterior ring power of channel in the described composite service.Comprise i exterior ring power control branch road 420 in the device shown in Figure 4, wherein i represents that the business that comprises in the composite service is total.In the device shown in Figure 4:
The input signal of described each exterior ring power control branch road 420 is that reception data, the output signal of its respective channels (that is: DCHi shown in Figure 4) is the target SIR long-run adjustment request of its respective channels, and described target SIR long-run adjustment request sends to described SIR and adjusts control module 410;
Comprise in described each exterior ring power control branch road 420: channel measurement module 421, short-term correction module 422 and long-term control module 423, wherein:
Described channel measurement module 421 is controlled the input signal of branch road as input signal with described exterior ring power, be used for check results according to the data that receive in the nearest one section Preset Time of its respective channels, calculate the long-time statistical quality of service value of this channel, described long-time statistical quality of service value is sent to described long-term control module 423;
Described short-term correction module 422 is controlled the input signal of branch road as input signal with described exterior ring power, be used for according to the check results of the current reception data of its respective channels and the quality of service desired value of this channel, assess the short period service quality of this channel, and send the short-term correction request of this channel target SIR according to the short period service quality of described channel to described long-term control module 423;
Described long-term control module 423 be used for according to from the long-time statistical quality of service value of channel measurement module 421, from the short-term correction request of the channel target SIR of short-term correction module 422, with and the quality of service desired value of respective channels, adjust the target SIR long-run adjustment request of control module 410 its respective channels of output to SIR;
Described SIR adjustment control module 410 is used for allowing according to the target SIR of the target SIR long-run adjustment request of described each channel and described composite service the scope of adjustment, adjusts the target SIR of described composite service.
When specific implementation, the input signal of described each exterior ring power control branch road 420 can be unit with the data block, at this moment, described short-term correction module 422 and long-term control module 423 with the target BLER of its respective channels as the quality of service desired value.Certainly, the input signal of described each exterior ring power control branch road 420 can be unit with the Frame also, at this moment, described short-term correction module 422 and long-term control module 423 with the target FER of its respective channels as the quality of service desired value.
Respectively each module in the device shown in Figure 4 is elaborated below.
Channel measurement module 421 in the device shown in Figure 4, be used for receiving data i logical value x (i) is set, when the CRC CRC check that receives data i is correct, put x (i)=0 at each, when receiving the CRC check mistake of data i, put x (i)=1; And according to N error = Σ i = - N 0 x ( n + i ) The misdata sum that receives in the nearest one section Preset Time of calculating channel; Wherein:
N ErrorRepresent the misdata sum that receives in nearest one section Preset Time;
N represents the number of reception data corresponding in the described Preset Time;
N represents the sequence number of current reception data;
And be used for N Error/ N is as the long-time statistical quality of service value of channel.
Short-term correction module 422 in the device shown in Figure 4 may further include short-term channel quality evaluation unit 424 and short-term correction control unit 425;
Described short-term channel quality evaluation unit 424 is used for assessing the short period service quality of this channel according to the check results of the current reception data of its respective channels and the quality of service desired value of this channel;
Described short-term correction control unit 425 is used for sending to described long-term control module 423 according to the short period service quality of described channel the short-term correction request of this channel target SIR.
Particularly:
Described short-term channel quality evaluation unit 424 is used to be provided with short-term channel quality of service measurement index Ashort and short period service quality threshold M, and the initial value of putting Ashort is 0; And when the CRC check of current reception data is correct, put Ashort=Ashort-S Target, when the CRC check mistake of current reception data, put Ashort=Ashort+S Target, wherein, S TargetThe quality of service desired value of representing this channel;
Described short-term correction control unit 425 is used for sending to described long-term control module according to the scope of Ashort the short-term correction request of this channel target SIR:
When | Ashort|＜M, do not send the request of adjusting target SIR to the long-term control module;
Ashort＜-M, send the short-term correction request of downward modulation target SIR to the long-term control module, put Ashort=Ashort+M simultaneously;
When Ashort＞M, send the short-term correction request of raising target SIR to the long-term control module, put Ashort=Ashort-M simultaneously.
In the device shown in Figure 4, the short-term correction request of the channel target SIR that described long-term control module 423 can receive from short-term correction module 422 comprises: raise the short-term correction request of target SIR and the short-term correction request of downward modulation target SIR; When receiving corresponding short-term correction request, described long-term control module 423 is used for:
When receiving downward modulation short-term correction request of target SIR and long-time statistical quality of service value＜quality of service desired value, adjust the long-run adjustment request of control module 410 output downward modulation target SIR to SIR;
When receiving downward modulation short-term correction request of target SIR and long-time statistical quality of service value＞quality of service desired value, do not adjust the request that target SIR are adjusted in control module 410 outputs to SIR;
When receiving the short-term correction request of raising target SIR and long-time statistical quality of service value＞quality of service desired value, adjust the long-run adjustment request that target SIR are raised in control module 410 outputs to SIR;
When receiving the short-term correction request of raising target SIR and long-time statistical quality of service value＜quality of service desired value, do not adjust the request that target SIR are adjusted in control module 410 outputs to SIR.
SIR in the device shown in Figure 4 adjusts control module 410 and may further include: SIR adjustment unit 411 and SIR control unit 412;
Described SIR adjustment unit 411 is used for determining according to default adjustment step-length δ according to the target SIR long-run adjustment request of described each channel the adjusted value of target SIR;
Described SIR control unit 412 is used for allowing according to the target SIR of described composite service the adjusted value of the target SIR that the scope adjusted and described SIR adjustment unit determine, adjusts the target SIR of described composite service.
In the device shown in Figure 4, described long-term control module 423 can comprise to the long-run adjustment request that SIR adjusts the channel target SIR of control module 410 outputs: raise the long-run adjustment request of target SIR and the long-run adjustment request of downward modulation target SIR;
Described SIR adjustment unit 411 is used for when receiving the long-run adjustment request of raising target SIR, with SIR TargetBe adjusted into (SIR Target+ δ), when receiving the long-run adjustment request of downward modulation target SIR, with SIR TargetBe adjusted into (SIR Target-δ); Wherein, SIR TargetExpression current goal SIR;
Described SIR control unit 412 is used at SIR Min＞SIR TargetThe time, the target SIR of described composite service is adjusted into SIR Min, SIR is set simultaneously Target=SIR MinAt SIR Max＜SIR TargetThe time, the target SIR of described composite service is adjusted into SIR Max, SIR is set simultaneously Target=SIR MaxAt SIR Min＜SIR Target＜SIR MaxThe time, the target SIR of described composite service is adjusted into SIR TargetWherein, SIR MinThe target SIR of representing described composite service allows to adjust lower limit, SIR MaxThe target SIR of representing described composite service allows to adjust the upper limit.
As seen from the above-described embodiment, the present invention at first adopts short-term with the mode that combines for a long time each professional corresponding channel in the composite service independently to be carried out the assessment of quality of service, and draw the adjustment mode at each professional corresponding channel in the composite service, promptly determine it is to raise target SIR at each professional corresponding channel in the composite service, the downward modulation target SIR is not still adjusted target SIR, then, take all factors into consideration the adjustment mode of each channel, in the scope that the target SIR permission of composite service is adjusted, adjust the target SIR of described composite service, thereby effectively improved the performance of exterior ring power control.
Adopt technical scheme provided by the present invention that composite service is carried out exterior ring power control, can obtain following beneficial effect:
1) the present invention can realize the exterior ring power control to composite service, makes under the prerequisite that each professional quality all is met in the composite service transmitting power minimum of transmitting terminal.
2) the present invention can be that in the composite service one professional actual quality of service fluctuates near the quality of service desired value, and other professional actual quality of service is not more than the corresponding business quality target value.
3) because the present invention determines that to each professional corresponding channel in the composite service adjustment mode is independently to carry out, do not need the interactive information of a plurality of interchannels, therefore, realize simple.
4) the present invention need not to carry out at a plurality of interchannels the selection of outer shroud control, realizes simple.
5) the present invention does not need to know in advance in the composite service that a plurality of channels satisfy separately and concerns between the quality of service desired value and SIR, and is very convenient in actual applications.
6) the present invention has overcome the unnecessary adjustment to target SIR that the channel burst mistake causes, thereby has increased the stability of exterior ring power control.
As seen, use the present invention and can effectively improve the performance of exterior ring power control with lower implementation complexity.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. the method that composite service is carried out exterior ring power control is characterized in that, comprising:
To each professional corresponding channel in the described composite service, execution in step A～C:
A, according to the check results of the data that receive in the nearest one section Preset Time of this channel, calculate the long-time statistical quality of service value of this channel;
B, according to the check results of the current reception data of this channel and the quality of service desired value of this channel, assess the short period service mass value of this channel, and determine the short-term correction mode of this channel target signal interference ratio SIR according to the short period service mass value of described channel;
C, the long-time statistical quality of service value according to this channel, the short-term correction mode of this channel target SIR and the quality of service desired value of this channel are determined the long-run adjustment mode of this channel target SIR;
D, allow the scope adjusted, adjust the target SIR of described composite service according to the target SIR of the long-run adjustment mode of the target SIR of described definite each channel and described composite service.
2. method according to claim 1 is characterized in that:
Described reception data are unit with the data block, and the quality of service value of described channel represents that with block error rate BLER described quality of service desired value is target BLER;
Perhaps, described reception data are unit with the Frame, and the quality of service value of described channel represents that with frame error rate FER described quality of service desired value is target FER.
3. method according to claim 2 is characterized in that, described steps A comprises:
A1, receive data i at each logical value x (i) is set;
A2, correct if receive the CRC CRC check of data i then puts x (i)=0, if receive the CRC check mistake of data i, then puts x (i)=1;
The A basis N error = Σ i = - N 0 x ( n + i ) The misdata sum that receives in the nearest one section Preset Time of calculating channel; Wherein:
N ErrorRepresent the misdata sum that receives in nearest one section Preset Time;
N represents the number of reception data corresponding in the described Preset Time;
N represents the sequence number of current reception data;
A4, with N Error/ N is as the long-time statistical quality of service value of channel.
4. method according to claim 2 is characterized in that, described step B comprises:
B1, short-term channel quality of service measurement index Ashort and short period service quality threshold M are set; The initial value of putting Ashort is 0;
B2, correct as if the CRC check of current reception data then puts Ashort=Ashort-S Target, if the CRC check mistake of current reception data is then put Ashort=Ashort+S Target, wherein, S TargetThe quality of service desired value of representing this channel;
B3, determine the short-term correction mode of this channel target SIR according to the scope of Ashort:
If | Ashort|＜M, then the short-term correction mode with this channel target SIR is defined as not adjusting target SIR;
If Ashort＜-M, then the short-term correction mode with this channel target SIR is defined as reducing target SIR, puts Ashort=Ashort+M simultaneously;
If Ashort＞M, then the short-term correction mode with this channel target SIR is defined as raising target SIR, puts Ashort=Ashort-M simultaneously.
5. according to each described method of claim 2 to 4, it is characterized in that the short-term correction mode of described channel target SIR comprises: raise target SIR, downward modulation target SIR and do not adjust target SIR;
Described step C comprises:
If the short-term correction mode of this channel target SIR is downward modulation target SIR and long-time statistical quality of service value＜quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as reducing target SIR;
If the short-term correction mode of this channel target SIR is downward modulation target SIR and long-time statistical quality of service value＞quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as not adjusting target SIR;
If the short-term correction mode of this channel target SIR is for raising target SIR and long-time statistical quality of service value＞quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as raising target SIR;
If the short-term correction mode of this channel target SIR is for raising target SIR and long-time statistical quality of service value＜quality of service desired value, then the long-run adjustment mode with this channel target SIR is defined as not adjusting order
FF-6. Yu She adjustment step-length δ determines the adjusted value of target SIR;
Described SIR control unit is used for allowing according to the target SIR of described composite service the adjusted value of the target SIR that the scope adjusted and described SIR adjustment unit determine, adjusts the target SIR of described composite service.
14. device according to claim 13, it is characterized in that described long-term control module comprises to the long-run adjustment request that SIR adjusts the channel target SIR of control module output: raise the long-run adjustment request of target SIR and the long-run adjustment request of downward modulation target SIR;
Described SIR adjustment unit is used for when receiving the long-run adjustment request of raising target SIR, with SIR TargetBe adjusted into SIR Target+ δ is when receiving the long-run adjustment request of downward modulation target SIR, with SIR TargetBe adjusted into SIR Target-δ; Wherein, SIR TargetExpression current goal SIR;
Described SIR control unit is used at SIR Min＞SIR TargetThe time, the target SIR of described composite service is adjusted into SIR Min, SIR is set simultaneously Target=SIR MinAt SIR Max＜SIR TargetThe time, the target SIR of described composite service is adjusted into SIR Max, SIR is set simultaneously Target=SIR MaxAt SIR Min＜SIR Target＜SIR MaxThe time, the target SIR of described composite service is adjusted into SIR TargetWherein, SIR MinThe target SIR of representing described composite service allows to adjust lower limit, SIR MaxThe target SIR of representing described composite service allows to adjust the upper limit.
CN2008102398605A 2008-12-19 2008-12-19 Method and apparatus for controlling external loop power of combined business Expired - Fee Related CN101437282B (en)

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