CN101388695A - External ring power control method - Google Patents

External ring power control method Download PDF

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Publication number
CN101388695A
CN101388695A CNA2008102260224A CN200810226022A CN101388695A CN 101388695 A CN101388695 A CN 101388695A CN A2008102260224 A CNA2008102260224 A CN A2008102260224A CN 200810226022 A CN200810226022 A CN 200810226022A CN 101388695 A CN101388695 A CN 101388695A
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code check
transmission
mapping table
rnc
error rate
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CN101388695B (en
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常永宏
赵训威
白杰
张鹏
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Beijing Haiyun Technology Co. Ltd.
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BEIJING NEW POSTCOM EQUIPMENT Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses a method for controlling the outer ring power. The method takes a base station as a decision subject of outer ring power control or RNC can calculate the physical channel capacity which is used in each transmission according to spread-spectrum factors and time slot number through increasing the spread-spectrum factors and the time slot number which are used in each subframe in an E-DCH data frame which is sent to the RNC by the base station, and thereby the method can effectively realize high speed uplink packet access outer ring power control in practical application.

Description

A kind of outer-loop power controlling method
Technical field
The present invention relates to the power control techniques in the mobile communication system, particularly relate to the outer-loop power controlling method in a kind of time division duplex (TDD) system.
Background technology
In the existing TDD system, insert (HSDPA) outer-loop power controlling method for high speed uplink packet, the method in the standard is by adjusted with reference to the mapping table realization of code check and power offset by radio network controller (RNC) at present.This mapping table is used to indicate UE to carry out the amplitude that power is adjusted, wherein, each default reference code check when UE transmits data according to certain with reference to code check, will be adjusted its transmitting power with reference to code check corresponding power offset in table with power offset of correspondence according to this in the table.In the method that proposes in the existing standard, RNC needs according to the default power control decision parameters (desired value that comprises the error rate, power control threshold value etc.) make the power control decision-making, particularly, be that each that is counted on compared with reference to the actual value of the code check error rate (BLER) and the desired value of the error rate, when both difference during greater than the power control threshold value, the needs that should can not satisfy current channel conditions in the described mapping table of current use with reference to the power offset of code check correspondence are described, need adjust it, then adjusted described mapping table is informed base station and UE side respectively, after this UE side will be adjusted its transmitting power according to adjusted mapping table, thereby realize the control of RNC to UE power.
By as can be known above-mentioned, in order to adjust the mapping table with reference to code check and power offset, RNC need be known the relevant information of the error rate that is used to calculate each code check, transmission block size (TBS), physical channel capacity and the error rate when promptly transmitting at every turn.And in actual applications, RNC only can count on the transmission block size according to (FP) frame proximate of Frame Protocol, and can't know the physical channel capacity information, correspondingly, can't determine the actual bit rate of each transmission according to TBS and physical channel capacity.
Therefore, the above-mentioned outer-loop power controlling method that proposes in the standard can't be realized in actual applications at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of outer-loop power controlling method, and this method can realize the high speed uplink packet access external circulation power control of TDD system.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of outer-loop power controlling method, this method may further comprise the steps:
A, RNC are notified to the base station with the power control decision parameters;
B, base station are according to λ e=S e/ R e, determine in default measurement period the UE actual bit rate λ when its transmission data at every turn e, according to the actual bit rate in described each when transmission and the resultant ACK/NACK information of described each transmission, the actual bit rate corresponding reference code check when determining described each transmission, and described ACK/NACK information with reference to the code check correspondence; Wherein, S eBe transmission block size, R eActual physics channel capacity during for transmission;
C, base station determine that according to all ACK/NACK information with reference to the code check correspondence of determining among the step b each is with reference to the actual error rate of code check in the described measurement period;
D, base station according in the described measurement period each with reference to the actual error rate and the described power control decision parameters of code check, need to judge whether the mapping table of renewal with reference to code check and power offset, if, then described mapping table is upgraded, and the described mapping table after will upgrading is notified to RNC, and the described mapping table that RNC will receive is notified to UE.
Preferably, described step a is:
RNC sets up request message or radio link reconfiguration request message or wireless link increasing request message by Radio Link, and the power control decision parameters are notified to the base station.
Preferably, the decision parameters of power control described in the step a are error rate desired value and error rate difference lagged value, in the described steps d base station according in the described measurement period each with reference to the actual error rate and the described power control decision parameters of code check, need to judge whether the mapping table of renewal with reference to code check and power offset, if then described mapping table is updated to:
The base station determines that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
Judge that whether described difference is greater than described error rate difference lagged value, if then upgrade the mapping table with reference to code check and power offset.
Preferably, power control decision parameters described in the step a are error rate desired value, error rate difference lagged value and lag time; Further comprise between described step b and the step c:
Actual bit rate corresponding reference code check when each transmission in described lag time behind the described measurement period is determined in x, base station, and described ACK/NACK information with reference to the code check correspondence;
The base station is according to each need to judge whether the mapping table of renewal with reference to code check and power offset with reference to the actual error rate and the described power control decision parameters of code check in the described measurement period, if then described mapping table is updated in the described steps d:
D1, base station determine that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
D2, whether judge described difference greater than described error rate difference lagged value, if, then execution in step d3,
D3, according to all ACK/NACK information of determining among step b and the step x with reference to the code check correspondence, determine that each is with reference to actual error rate of code check in the hysteresis cycle, described hysteresis cycle comprises described measurement period and described lag time;
D4, determine that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described hysteresis cycle;
Whether the described difference of determining among d5, the determining step d4 is greater than described error rate difference lagged value, if then upgrade the mapping table with reference to code check and power offset.
Preferably, described actual bit rate corresponding reference code check when determining described each transmission, and described ACK/NACK information with reference to the code check correspondence is:
Whether the actual bit rate when judging this transmission equals one with reference to code check, if, then determine described actual bit rate corresponding reference code check when transmit for this with reference to code check, described ACK/NACK information with reference to the code check correspondence is the ACK/NACK information of this generation when transmitting; Otherwise, determine described actual bit rate immediate two with reference to code check With Actual bit rate corresponding reference code check when transmitting for this, and determine described with reference to code check
Figure A200810226022D00103
Corresponding ACK/NACK information is η iThe ACK/NACK information that individual this when transmission produces is determined described with reference to code check Corresponding ACK or nack message are η I+1The ACK/NACK information that individual this when transmission produces, wherein, &lambda; ~ i < &lambda; e < &lambda; ~ i + 1 , &eta; i = ( &lambda; ~ i + 1 - &lambda; e ) / ( &lambda; ~ i + 1 - &lambda; ~ i ) ,
Figure A200810226022D00107
Preferably, the described mapping table with reference to code check and power offset after will upgrading in the described steps d is notified to RNC and is:
The base station sends radio link parameter update message to RNC, and described radio link parameter update message is carried the described mapping table with reference to code check and power offset after the renewal; Or
The base station sends external circule power control parameter update message to RNC, and described external circule power control parameter update message is carried the described mapping table with reference to code check and power offset after the renewal; RNC sends described external circule power control parameter response message according to the described external circule power control parameter update message that receives to described base station; Or
The base station is to RNC transmit frame agreement FP frame, and described Frame Protocol FP frame carries the described mapping table with reference to code check and power offset after the renewal; Described Frame Protocol FP frame is the special-purpose FP control frame that exterior ring power control frame or radio interface parameter upgrade frame or user plane; Or
The base station is notified to RNC by strengthening special uplink channel E-DCH Frame with the described mapping table with reference to code check and power offset after upgrading; Or
RNC sets up response message or radio link reconfiguration response message or Radio Link by Radio Link increases response message, and the described mapping table with reference to code check and power offset after upgrading is notified to RNC.
Preferably, the described mapping table that RNC will receive in the described steps d is notified to UE and is:
Described RNC is notified to UE by the wireless reconfiguration course of eating dishes without rice or wine with the described mapping table that receives.
The present invention proposes another kind of outer-loop power controlling method, and this method may further comprise the steps:
The spreading factor of each subframe use and the E-DCH Frame of number of timeslots information are carried to the RNC transmission in W1, base station in default measurement period;
Spreading factor and number of timeslots information that W2, described RNC use according to each subframe of carrying in the described E-DCH Frame are determined the physical channel capacity R that the described E-DCH Frame of each transmission uses in the described measurement period e
W3, described RNC are according to λ e=S e/ R e, the actual bit rate λ when determining the described E-DCH Frame of each transmission in the described measurement period eCorrect or the error message of transmission of carrying in the E-DCH Frame according to the actual bit rate in described each when transmission and described each transmission, determine the actual bit rate corresponding reference code check in described each when transmission, and the described correct or error message of transmission with reference to the code check correspondence; Wherein, S eThe transmission block size of carrying in the E-DCH Frame during for each transmission;
W4, described RNC determine that according to all correct or error messages of transmission with reference to the code check correspondence of determining among the step W3 each is with reference to the actual error rate of code check in the described measurement period;
W5, described RNC according in the described measurement period each with reference to the actual error rate of code check and default power control decision parameters, need to judge whether the mapping table of renewal with reference to code check and power offset, if, then described mapping table is upgraded, and the described mapping table after will upgrading is notified to base station and UE respectively; Described power control decision parameters are error rate desired value and error rate difference lagged value.
Preferably, correct or the error message of transmission of carrying in the actual bit rate among the step W3 during and the E-DCH Frame of described each transmission according to the described E-DCH Frame of described each transmission, determine the actual bit rate corresponding reference code check in described each when transmission, and described transmission with reference to the code check correspondence is correct or error message is:
Whether the actual bit rate when judging this transmission equals one with reference to code check, if, then determine described actual bit rate corresponding reference code check when transmit for this with reference to code check, the correct or error message of described transmission with reference to the code check correspondence be this transmission when transmitting correctly or error message; Otherwise, determine described actual bit rate immediate two with reference to code check
Figure A200810226022D00111
With Actual bit rate λ when transmitting for this eThe corresponding reference code check, and determine described with reference to code check
Figure A200810226022D00113
Correct or the error message of corresponding transmission is η iCorrect or the error message of the transmission in individual this when transmission is determined described with reference to code check Correct or the error message of corresponding transmission is η I+1Correct or the error message of the transmission in individual this when transmission, wherein, &lambda; ~ i < &lambda; e < &lambda; ~ i + 1 , &eta; i = ( &lambda; ~ i + 1 - &lambda; e ) / ( &lambda; ~ i + 1 - &lambda; ~ i ) ,
Figure A200810226022D00122
Preferably, RNC described in the step W5 according in the described measurement period each with reference to the actual error rate of code check and default power control decision parameters, need to judge whether the mapping table of renewal with reference to code check and power offset, if then described mapping table is updated to:
The base station determines that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
Whether judge described difference greater than described error rate difference lagged value, if then upgrade mapping table with reference to code check and power offset.
In sum, the present invention by by the base station as the decision-maker of external circule power control or by increasing employed spreading factor of each subframe and number of time slots in the E-DCH Frame that sends to RNC in the base station, the physical channel capacity that uses when making RNC can calculate each the transmission, and can make the power control decision-making in view of the above, therefore, the present invention can effectively realize the control of HSDPA exterior ring power in actual applications.
Description of drawings
Fig. 1 is the schematic flow sheet of embodiments of the invention one;
Fig. 2 is the schematic flow sheet of embodiments of the invention two.
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 the accompanying drawings and the specific embodiments.
Main thought of the present invention is: in existing standard, because RNC can't be known the physical channel capacity information that UE uses when the base station transmits data at every turn, and cause RNC can't make the problem of external circule power control decision-making, the present invention proposes two kinds of solutions.A solution is by the decision-maker of base station as external circule power control, because in the practical application, the base station can know that each enhancing inserts transmission block size, physical channel capacity and the cyclic redundancy check (CRC) object information of ascending control channel (E-PUCH) transmission at random, therefore can count each error rate, and further make the power control decision-making in view of the above with reference to the code check correspondence; Another kind is still by the decision-maker of RNC as external circule power control, but in strengthening special uplink channel (E-DCH) Frame, increase employed spreading factor of each subframe and number of time slots, this E-DCH Frame is the Frame that obtains after change the data block format that receives from UE the base station when transmitting at every turn, so that can give RNC with the data forwarding that UE need transmit by the interface (being Iub interface) between itself and the RNC.Like this, RNC just can obtain spreading factor and number of time slots from the E-DCH Frame, and then can go out the physical channel capacity that each when transmission use according to above-mentioned information calculations, thus make RNC can determine the actual bit rate of each transmission, and make the power control decision-making in view of the above.Below by specific embodiments of the invention above-mentioned solution is described further.
Fig. 1 is the schematic flow sheet of the embodiment of the invention one.As shown in Figure 1, this embodiment one mainly may further comprise the steps:
Step 101, RNC are notified to the base station with the power control decision parameters;
In actual applications, RNC can set up request message or radio link reconfiguration request message or wireless link increasing request message by Radio Link, and the power control decision parameters are notified to the base station.
Here, described power control decision parameters comprise error rate desired value and error rate difference lagged value at least, actual needs according to decision-making, can also comprise information lag time, wherein, described error rate desired value is to be used for determining whether each actual error rate with reference to code check that actual transmissions obtains is to make system have the ideal value of better performance, this error rate desired value is predefined by system, need be notified to the base station by RNC, described error rate difference lagged value is to be used to weigh each whether to have exceeded the degree that system can tolerate with reference to the actual error rate of code check and the difference of error rate desired value, just be used to judge whether to carry out the threshold value of power control, be to be used for the condition that further qualification need be carried out power control described lag time, promptly under the situation that described difference after this lag time still exists, just need carry out power control, to avoid producing ping-pong, be that system makes the power control decision-making continually, the excessive loss who causes system resource, in the practical application, also can be set up on their own by the base station described lag time.
Step 102, base station are according to λ e=S e/ R e, determine the interior UE of the default measurement period actual bit rate λ when its transmission data at every turn e, according to the actual bit rate and the resultant ACK/NACK information of described each transmission in described each when transmission, the actual bit rate corresponding reference code check when determining described each transmission, and described ACK/NACK information with reference to the code check correspondence; Wherein, S eBe transmission block size, R eActual physics channel capacity during for transmission.
Need to prove that when transmitting each time, the base station can be judged this correctness of transmitting the result, produces the ACK/NACK feedback information and gives UE, can produce ACK information when transmission is correct, can produce nack message when error of transmission.In the practical application, the error rate then is that the nack message that obtains in repeatedly transmitting by statistics obtains.
In this step, the ACK/NACK information that produces when the actual bit rate when described basis is transmitted at every turn and each transmission, actual bit rate corresponding reference code check when determining each the transmission, and the implementation method of described ACK/NACK information with reference to the code check correspondence, do not provide in existing standard, the concrete grammar in the present embodiment is:
Whether the actual bit rate when judging this transmission equals one with reference to code check, if, then determine described actual bit rate corresponding reference code check when transmit for this with reference to code check, described ACK/NACK information with reference to the code check correspondence is the ACK/NACK information of this generation when transmitting; Otherwise, determine described actual bit rate immediate two with reference to code check With Actual bit rate corresponding reference code check when transmitting for this, and determine described with reference to code check
Figure A200810226022D00143
Corresponding ACK/NACK information is η iACK or nack message that individual this when transmission produces are determined described with reference to code check
Figure A200810226022D00144
Corresponding ACK or nack message are η I+1The ACK/NACK information that individual this when transmission produces, wherein, &lambda; ~ i < &lambda; e < &lambda; ~ i + 1 , &eta; i = ( &lambda; ~ i + 1 - &lambda; e ) / ( &lambda; ~ i + 1 - &lambda; ~ i ) ,
Figure A200810226022D00146
For example, if get 0.1 5 values of being spaced apart between the 0.2-0.6, promptly with reference to code check
Figure A200810226022D00147
Be 0.2,
Figure A200810226022D00148
Be 0.3, Be 0.4,
Figure A200810226022D001410
Be 0.5, Be 0.6, so for actual bit rate λ eBe 0.24 once transmission, if the transmission result of this time transmission is wrong, i.e. this time transmission will produce nack message, and then actual bit rate is that 0.24 corresponding reference code check is 0.2 and 0.3 (promptly With
Figure A200810226022D001413
), correspondingly, according to &eta; 1 = ( &lambda; ~ 2 - &lambda; e ) / ( &lambda; ~ 2 - &lambda; ~ 1 ) = 0.6 ,
Figure A200810226022D001415
ACK/NACK information with reference to code check 0.2 correspondence is 0.6 NACK, is 0.4 NACK with reference to the ACK/NACK information of code check 0.3 correspondence.Again for example, if once Chuan Shu actual bit rate is 0.3, and the result of this time transmission is correct, and then this time transmission corresponding reference code check is exactly 0.3 so, correspondingly, in this time transmission, is 1 ACK with reference to the ACK/NACK information of code check 0.3 correspondence.
Step 103, base station determine that according to all ACK/NACK information with reference to the code check correspondence of determining in the step 102 each is with reference to the actual error rate of code check in the described measurement period;
The concrete grammar of this step is:
ACK/NACK information according to the reference code check correspondence in each when transmission that obtains in the step 102, each ACK/NACK information of statistics with reference to code check correspondence in described predetermined period, according to each statistics, determine each actual error rate with reference to code check with reference to the ACK/NACK information of code check correspondence.Here, how to determine the actual error rate according to the statistics of ACK/NACK information, known for those skilled in the art, repeat no more herein.
Step 104, ".
Here, because the difference of the power control decision parameters that use in the practical application, need to judge whether renewal also different with the concrete grammar of the mapping table of power offset in this step with reference to code check, when described power control decision parameters only were error rate desired value and error rate difference lagged value, its concrete grammar was:
The base station determines that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
Judge that whether described difference is greater than described error rate difference lagged value, if then upgrade the mapping table with reference to code check and power offset.
Here, specifically how to upgrade mapping table with reference to code check and power offset, known for those skilled in the art, do not repeat them here.
In actual applications, the reference code check that relates in this step and the initial mapping table of power offset can be provided by the actual transmissions situation of base station according to channel.
In actual applications, for fear of foregoing ping-pong, the difference tolerance parameter lag time of the error rate need be considered in the base station when carrying out the power control decision-making, when need be notified to the base station this lag time by RNC, then the described power control decision parameters in the step 101 will further comprise lag time.
Correspondingly, after all ACK/NACK information in the base station has obtained a measurement period with reference to the code check correspondence, be after the step 102, the base station need be when determining each transmission in the step 102 actual bit rate corresponding reference code check, and the method for described ACK/NACK information with reference to the code check correspondence, actual bit rate corresponding reference code check when determining the each transmission in the lag time behind this measurement period, and described ACK/NACK information with reference to the code check correspondence;
Correspondingly, need to judge whether renewal to be in this step with reference to the concrete grammar of the mapping table of code check and power offset:
The base station determines that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
Whether judge described difference greater than described error rate difference lagged value, if, then execution in step d3,
According to fixed described measurement period and all the ACK/NACK information in described lag time with reference to the code check correspondence, determine that each is with reference to the actual error rate of code check in the hysteresis cycle, described hysteresis cycle comprises described measurement period and described lag time;
Determine that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described hysteresis cycle; Judge that whether described difference is greater than described error rate difference lagged value, if then upgrade the mapping table with reference to code check and power offset.
In the practical application, the method that the described mapping table with reference to code check and power offset after will upgrading in this step is notified to RNC has multiple, can adopt following several mode to realize:
Mode 1, base station send radio link parameter update message to RNC, and described radio link parameter update message is carried the described mapping table with reference to code check and power offset after the renewal;
Mode 2, base station send external circule power control parameter update message to RNC, and described external circule power control parameter update message is carried the described mapping table with reference to code check and power offset after the renewal; RNC sends described external circule power control parameter response message according to the described external circule power control parameter update message that receives to described base station;
Mode 3, base station are to RNC transmit frame agreement FP frame, and described Frame Protocol FP frame carries the described mapping table with reference to code check and power offset after the renewal; Described Frame Protocol FP frame is the special-purpose FP control frame that exterior ring power control frame or radio interface parameter upgrade frame or user plane;
Mode 4, base station are notified to RNC by strengthening special uplink channel E-DCH Frame with the described mapping table with reference to code check and power offset after upgrading;
Mode 5, RNC set up response message or radio link reconfiguration response message or Radio Link increase response message by Radio Link, and the described mapping table with reference to code check and power offset after upgrading is notified to RNC.
In the advice method of above-mentioned mapping table, mode the 1,2, the 5th, realize by control plane the base station, mode 3,4 then is that realize by user plane the base station, wherein, mode 5 be set up at Radio Link/reshuffle/when carrying out exterior ring power control in the increase process, utilize corresponding message in the described process to realize.
In actual applications, RNC can be notified to UE with the described mapping table after upgrading by the wireless reconfiguration course of eating dishes without rice or wine in the step 104, and concrete grammar is:
Described RNC sends radio bearer to UE and sets up or reconfiguration request message, will carry the described mapping table after the renewal in the described message;
Described UE sets up or reconfiguration request message according to the described radio bearer that receives, and sends radio bearer to described RNC and sets up or reshuffle and finish message.
The embodiment of the invention two has provided a kind of outer-loop power controlling method that is carried out the external circule power control decision-making by RNC.The main body that embodiment two and the main distinction of embodiment one are to make the power control decision-making is different, is identical and specifically how to make the power control decision methods according to known power control parameters, will not give unnecessary details hereinafter.Fig. 2 is the schematic flow sheet of embodiments of the invention two, and as shown in Figure 2, this embodiment mainly may further comprise the steps:
The spreading factor of each subframe use and the E-DCH Frame of number of timeslots information are carried to the RNC transmission in step 201, base station in default measurement period.
Spreading factor and number of timeslots information that step 202, described RNC use according to each subframe of carrying in the described E-DCH Frame are determined the physical channel capacity R that the described E-DCH Frame of each transmission uses in the described measurement period e
Here, determine that the concrete grammar of the physical channel capacity that each transmission is used is known as those skilled in the art, do not repeat them here.
Step 203, described RNC are according to λ e=S e/ R e, the actual bit rate λ when determining the described E-DCH Frame of each transmission in the described measurement period eCorrect or the error message of transmission of carrying in the E-DCH Frame according to the actual bit rate in described each when transmission and described each transmission, determine the actual bit rate corresponding reference code check in described each when transmission, and the described correct or error message of transmission with reference to the code check correspondence; Wherein, S eThe transmission block size of carrying in the E-DCH Frame during for each transmission.
In this step, the actual bit rate corresponding reference code check when determining each transmission, and described transmission concrete grammar correct or error message with reference to the code check correspondence can adopt the one similar method with embodiment, that is:
Whether the actual bit rate when judging this transmission equals one with reference to code check, if, then determine described actual bit rate corresponding reference code check when transmit for this with reference to code check, the correct or error message of described transmission with reference to the code check correspondence be this transmission when transmitting correctly or error message; Otherwise, determine described actual bit rate immediate two with reference to code check
Figure A200810226022D00181
With
Figure A200810226022D00182
Actual bit rate λ when transmitting for this eThe corresponding reference code check, and determine described with reference to code check
Figure A200810226022D00183
Correct or the error message of corresponding transmission is η iCorrect or the error message of the transmission in individual this when transmission is determined described with reference to code check
Figure A200810226022D00184
Correct or the error message of corresponding transmission is η I+1Correct or the error message of the transmission in individual this when transmission, wherein, &lambda; ~ i < &lambda; e < &lambda; ~ i + 1 , &eta; i = ( &lambda; ~ i + 1 - &lambda; e ) / ( &lambda; ~ i + 1 - &lambda; ~ i ) , &eta; i + 1 = ( &lambda; e - &lambda; ~ i ) / ( &lambda; ~ i + 1 - &lambda; ~ i ) .
Step 204, described RNC determine that according to fixed all correct or error messages of transmission with reference to the code check correspondence in the step 203 each is with reference to the actual error rate of code check in the described measurement period.
Step 205, described RNC according in the described measurement period each with reference to the actual error rate of code check and default power control decision parameters, need to judge whether the mapping table of renewal with reference to code check and power offset, if, then described mapping table is upgraded, and the described mapping table after will upgrading is notified to base station and UE respectively.
In this step, described power control decision parameters are error rate desired value and error rate difference lagged value, also may further include lag time, the concrete mapping table that how to judge whether to upgrade with reference to code check and power offset, and the mapping table after will upgrading to be notified to the specific implementation method of UE identical with method among the embodiment one, repeat no more herein.
Here, RNC can set up request message or wireless link increasing request message or radio link reconfiguration request message by Radio Link, and the mapping table after upgrading is notified to the base station.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1, a kind of outer-loop power controlling method is characterized in that, this method may further comprise the steps:
A, radio network controller (RNC) are notified to the base station with the power control decision parameters;
B, base station are according to λ e=S e/ R e, determine in default measurement period the user equipment (UE) actual bit rate λ when its transmission data at every turn e, according to the actual bit rate in described each when transmission and the resultant ACK/NACK information of described each transmission, the actual bit rate corresponding reference code check when determining described each transmission, and described ACK/NACK information with reference to the code check correspondence; Wherein, S eBe transmission block size, R eActual physics channel capacity during for transmission;
C, base station determine that according to all ACK/NACK information with reference to the code check correspondence of determining among the step b each is with reference to the actual error rate of code check in the described measurement period;
D, base station according in the described measurement period each with reference to the actual error rate and the described power control decision parameters of code check, need to judge whether the mapping table of renewal with reference to code check and power offset, if, then described mapping table is upgraded, and the described mapping table after will upgrading is notified to RNC, and the described mapping table that RNC will receive is notified to UE.
2, method according to claim 1 is characterized in that, described step a is:
RNC sets up request message or radio link reconfiguration request message or wireless link increasing request message by Radio Link, and the power control decision parameters are notified to the base station.
3, method according to claim 1, it is characterized in that, the decision parameters of power control described in the step a are error rate desired value and error rate difference lagged value, in the described steps d base station according in the described measurement period each with reference to the actual error rate and the described power control decision parameters of code check, need to judge whether the mapping table of renewal with reference to code check and power offset, if then described mapping table is updated to:
The base station determines that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
Judge that whether described difference is greater than described error rate difference lagged value, if then upgrade the mapping table with reference to code check and power offset.
4, method according to claim 1 is characterized in that, the decision parameters of power control described in the step a are error rate desired value, error rate difference lagged value and lag time; Further comprise between described step b and the step c:
Actual bit rate corresponding reference code check when each transmission in described lag time behind the described measurement period is determined in x, base station, and described ACK/NACK information with reference to the code check correspondence;
The base station is according to each need to judge whether the mapping table of renewal with reference to code check and power offset with reference to the actual error rate and the described power control decision parameters of code check in the described measurement period, if then described mapping table is updated in the described steps d:
D1, base station determine that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
D2, whether judge described difference greater than described error rate difference lagged value, if, then execution in step d3,
D3, according to all ACK/NACK information of determining among step b and the step x with reference to the code check correspondence, determine that each is with reference to actual error rate of code check in the hysteresis cycle, described hysteresis cycle comprises described measurement period and described lag time;
D4, determine that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described hysteresis cycle;
Whether the described difference of determining among d5, the determining step d4 is greater than described error rate difference lagged value, if then upgrade the mapping table with reference to code check and power offset.
5, according to claim 1 or 4 described methods, it is characterized in that, described actual bit rate corresponding reference code check when determining described each transmission, and described ACK/NACK information with reference to the code check correspondence is:
Whether the actual bit rate when judging this transmission equals one with reference to code check, if, then determine described actual bit rate corresponding reference code check when transmit for this with reference to code check, described ACK/NACK information with reference to the code check correspondence is the ACK/NACK information of this generation when transmitting; Otherwise, determine described actual bit rate immediate two with reference to code check
Figure A200810226022C00031
With Actual bit rate corresponding reference code check when transmitting for this, and determine described with reference to code check
Figure A200810226022C0003163634QIETU
Corresponding ACK/NACK information is η iThe ACK/NACK information that individual this when transmission produces is determined described with reference to code check
Figure A200810226022C00041
Corresponding ACK or nack message are η I+1The ACK/NACK information that individual this when transmission produces, wherein, &lambda; ~ i < &lambda; e < &lambda; ~ i + 1 , &eta; i = ( &lambda; ~ i + 1 - &lambda; e ) / ( &lambda; ~ i + 1 - &lambda; ~ i ) ,
Figure A200810226022C00044
According to claim 3 or 4 described methods, it is characterized in that 6, the described mapping table with reference to code check and power offset after will upgrading in the described steps d is notified to RNC and is:
The base station sends radio link parameter update message to RNC, and described radio link parameter update message is carried the described mapping table with reference to code check and power offset after the renewal; Or
The base station sends external circule power control parameter update message to RNC, and described external circule power control parameter update message is carried the described mapping table with reference to code check and power offset after the renewal; RNC sends described external circule power control parameter response message according to the described external circule power control parameter update message that receives to described base station; Or
The base station is to RNC transmit frame agreement FP frame, and described Frame Protocol FP frame carries the described mapping table with reference to code check and power offset after the renewal; Described Frame Protocol FP frame is the special-purpose FP control frame that exterior ring power control frame or radio interface parameter upgrade frame or user plane; Or
The base station is notified to RNC by strengthening special uplink channel E-DCH Frame with the described mapping table with reference to code check and power offset after upgrading; Or
RNC sets up response message or radio link reconfiguration response message or Radio Link by Radio Link increases response message, and the described mapping table with reference to code check and power offset after upgrading is notified to RNC.
7, method according to claim 1 is characterized in that, the described mapping table that RNC will receive in the described steps d is notified to UE and is:
Described RNC is notified to UE by the wireless reconfiguration course of eating dishes without rice or wine with the described mapping table that receives.
8, a kind of outer-loop power controlling method is characterized in that, this method may further comprise the steps:
The spreading factor of each subframe use and the E-DCH Frame of number of timeslots information are carried to the RNC transmission in W1, base station in default measurement period;
Spreading factor and number of timeslots information that W2, described RNC use according to each subframe of carrying in the described E-DCH Frame are determined the physical channel capacity R that the described E-DCH Frame of each transmission uses in the described measurement period e
W3, described RNC are according to λ e=S e/ R e, the actual bit rate λ when determining the described E-DCH Frame of each transmission in the described measurement period eCorrect or the error message of transmission of carrying in the E-DCH Frame according to the actual bit rate in described each when transmission and described each transmission, determine the actual bit rate corresponding reference code check in described each when transmission, and the described correct or error message of transmission with reference to the code check correspondence; Wherein, S eThe transmission block size of carrying in the E-DCH Frame during for each transmission;
W4, described RNC determine that according to all correct or error messages of transmission with reference to the code check correspondence of determining among the step W3 each is with reference to the actual error rate of code check in the described measurement period;
W5, described RNC according in the described measurement period each with reference to the actual error rate of code check and default power control decision parameters, need to judge whether the mapping table of renewal with reference to code check and power offset, if, then described mapping table is upgraded, and the described mapping table after will upgrading is notified to base station and UE respectively; Described power control decision parameters are error rate desired value and error rate difference lagged value.
9, method according to claim 8, it is characterized in that, correct or the error message of transmission of carrying in the actual bit rate among the step W3 during and the E-DCH Frame of described each transmission according to the described E-DCH Frame of described each transmission, determine the actual bit rate corresponding reference code check in described each when transmission, and described transmission with reference to the code check correspondence is correct or error message is:
Whether the actual bit rate when judging this transmission equals one with reference to code check, if, then determine described actual bit rate corresponding reference code check when transmit for this with reference to code check, the correct or error message of described transmission with reference to the code check correspondence be this transmission when transmitting correctly or error message; Otherwise, determine described actual bit rate immediate two with reference to code check
Figure A200810226022C00051
With
Figure A200810226022C00052
Actual bit rate λ when transmitting for this eThe corresponding reference code check, and determine described with reference to code check
Figure A200810226022C00053
Correct or the error message of corresponding transmission is η iCorrect or the error message of the transmission in individual this when transmission is determined described with reference to code check Correct or the error message of corresponding transmission is η I+1Correct or the error message of the transmission in individual this when transmission, wherein, &lambda; ~ i < &lambda; e < &lambda; ~ i + 1 , &eta; i = ( &lambda; ~ i + 1 - &lambda; e ) / ( &lambda; ~ i + 1 - &lambda; ~ i ) ,
Figure A200810226022C00057
10, method according to claim 8, it is characterized in that, RNC described in the step W5 according in the described measurement period each with reference to the actual error rate of code check and default power control decision parameters, need to judge whether the mapping table of renewal with reference to code check and power offset, if then described mapping table is updated to:
The base station determines that each is with reference to the actual error rate of code check and the difference of error rate desired value in the described measurement period;
Whether judge described difference greater than described error rate difference lagged value, if then upgrade mapping table with reference to code check and power offset.
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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN102076070A (en) * 2011-01-14 2011-05-25 大唐移动通信设备有限公司 Method and device for adjusting expected received signal to noise ratio of terminal
CN102196546A (en) * 2010-09-30 2011-09-21 重庆重邮信科通信技术有限公司 Uplink control method for reducing error rate of TD-HSUPA (Time Division-High Speed Uplink Packet Access)

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CN101112011B (en) * 2005-02-01 2011-07-13 艾利森电话股份有限公司 Outer loop power control for f-dpch
CN101176273B (en) * 2005-05-20 2012-04-04 Lm爱立信电话有限公司 Method and apparatus for communication channel error rate estimation
CN101162926A (en) * 2007-11-15 2008-04-16 华为技术有限公司 High-speed uplink packet access external circulation power control method of soft switch

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Publication number Priority date Publication date Assignee Title
CN102196546A (en) * 2010-09-30 2011-09-21 重庆重邮信科通信技术有限公司 Uplink control method for reducing error rate of TD-HSUPA (Time Division-High Speed Uplink Packet Access)
CN102196546B (en) * 2010-09-30 2012-06-13 重庆重邮信科通信技术有限公司 Uplink control method for reducing error rate of TD-HSUPA (Time Division-High Speed Uplink Packet Access)
CN102076070A (en) * 2011-01-14 2011-05-25 大唐移动通信设备有限公司 Method and device for adjusting expected received signal to noise ratio of terminal
CN102076070B (en) * 2011-01-14 2016-01-20 大唐移动通信设备有限公司 A kind of method and apparatus adjusting the expectation received signal to noise ratio of terminal

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