CN101277134A - Method for implementing exterior loop power control - Google Patents
Method for implementing exterior loop power control Download PDFInfo
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- CN101277134A CN101277134A CNA200810094693XA CN200810094693A CN101277134A CN 101277134 A CN101277134 A CN 101277134A CN A200810094693X A CNA200810094693X A CN A200810094693XA CN 200810094693 A CN200810094693 A CN 200810094693A CN 101277134 A CN101277134 A CN 101277134A
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Abstract
The present invention discloses a method for realizing control to the power of external ring. The method comprises the following procedures: a. setting an external ring power adjusting time window of the high speed descending shearing channel HSDSCH; and b. executing HSDSCH external ring power adjustment according to whether the time period between the time for transmitting the medium access control sublayer MAG-hs package of the reported feedback information of the high speed descending shearing channel HSDSCH, and returning to procedure b when the adjustment is completed. The method for realizing control to the power of external ring according to the invention can improve the capability of the external power control of the HSDSCH and lead to that the corresponding UE obtains an ideal target BLER and UE throughput. The usage factor of the channel can be increased.
Description
Technical field
The present invention relates to power control techniques, relate in particular to the implementation method of the exterior ring power control that is applied to high-speed downlink shared channel (HSDSCH) in a kind of HSDPA technology.
Background technology
At present, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) is one of mainstream technology of 3-G (Generation Three mobile communication system) (3G), comprises R99 (Release 99), R4 (Release 4), R5 (Release 5) and R6 versions such as (Release 6).High-speed downlink packet inserts (HSDPA, High Speed Down link Packet Access) technology is the Enhanced Technology of WCDMA based on R5, can improve downlink capacity and data service rate in WCDMA network high-speed downlink link data transmission rate and the WCDMA networking.
The HSDPA channel comprises HSDSCH, High-Speed Shared Control Channel (HSSCCH) and High-Speed Dedicated Physical Control Channel (HSDPCCH).Wherein, HSDSCH mapping channel code resource, different mobile stations is shared channel resource and channel code resource in the different periods; The control information of HSSCCH carrying from Media Access Control (MAC-hs) to data receiver, this information is sent to travelling carriage every 2ms from the base station; HSDPCCH then is used for to base station report down channel quality situation by travelling carriage and asks the base station to retransmit vicious data block.Here, data receiver also can directly be called terminal.
HSDPA makes that resources such as through-put power, PN sign indicating number can be according to user's actual conditions dynamic assignment, unified use, resource utilization height because increased HSDSCH; And, owing to adopted some adaptive link layer technology more efficiently, for example the rapid link adjustment technology, in conjunction with the rapid mixing retransmission technique of soft merging, centralized dispatching technology etc., can adjust transmission parameter according to current channel conditions.Because ring and exterior ring power control in HSDSCH and HSSCCH handle and need simultaneously, to reduce the difference between subscriber equipment (UE) reporting channel condition and the real channel condition, thereby can reduce the target Block Error Rate (BLER) in the corresponding UE transmitting-receiving bag transmission course, and can increase the throughput of corresponding UE.
But, because the variation of signal is more violent in the wireless communication system, small interference or error can cause that all very big signal changes, for example: when measuring the difference between UE reporting channel condition and the real channel condition, exist and measure inaccurate or not accurate enough error; In the transmitting-receiving bag transmission course, whether terminal receives that to transmitting terminal feedback corresponding transmitting-receiving bag and/or the transmitting-receiving package informatin of being received are when just confirming (ACK) or negative acknowledgment information such as (NACK), also has feedback and receives the actual asynchronous and theoretical problems such as error between synchronous of time-delay.Generally speaking, can pass through problems such as this measurement of exterior ring power control break is inaccurate, delay of feedback.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of implementation method of exterior ring power control, can make corresponding UE obtain comparatively ideal target BLER and UE throughput, and can improve channel utilization.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of implementation method of exterior ring power control comprises step:
A., high-speed downlink shared channel HSDSCH exterior ring power is set adjusts time window;
B. whether set time window in carry out HSDSCH exterior ring power adjustment at the delivery time of High-Speed Dedicated Physical Control Channel HSDPCCH uploading feedback information medium used thereof access control sublayer MAC-hs bag apart from the time period of current time according to current user equipment UE, this returns step b after adjusting and finishing.
Described method further comprises: initialization is provided with the adjusted value S of the HSDSCH exterior ring power control of current UE in the HSDPA business.
Wherein, described step b further comprises in described time window the time the described time period:
B1, be just to confirm ACK or negative acknowledgment NACK to the feedback information of transmitting terminal, adjust the adjusted value of the HSDSCH exterior ring power control of current UE according to the receiving terminal of current transmitting-receiving bag.
The described time period, described step b further comprised step not in described time window the time:
B2, renewal current time window, and the adjusted value of the HSDSCH exterior ring power control of adjustment current UE; After adjusting end, the current feedback information that current UE reports is carried out the step of described time period in described time window.
In the said method, when described feedback information was ACK, described step b1 further comprised: the adjusted value of the HSDSCH exterior ring power control of downward modulation current UE.
When described feedback information was NACK, described step b1 further comprised: the adjusted value that raises the HSDSCH exterior ring power control of current UE.
In the said method, upgrade current time window step among the described step b2 and further comprise: current time is deducted time point that current time window size obtains as the new lower limb of time window.
Wherein, the adjusted value of the HSDSCH exterior ring power control of adjustment current UE further comprises among the described step b2: add up the former time window lower limb distance feedback information that current UE transmission MAC-hs wraps in the new time window lower limb time period; When feedback information is ACK, the S value of current UE is added 1; When feedback information was NACK, the respective objects BLER that wraps according to the current MAC-hs of current UE calculated weighted value K, and the S value of current UE is deducted K.
Described method further comprises: the target block error rate BLER that the current UE transmission is set; The adjusted value of the HSDSCH exterior ring power control of described rise current UE further comprises: the respective objects BLER according to the current MAC-hs bag of current UE calculates weighted value K, and the adjusted value of the current HSDSCH exterior ring power control of current UE is increased K.
Described method also comprises: according to the current channel quality indicator CQI value of adjusted value correction of the HSDSCH exterior ring power of current UE.
Among the present invention,, the current transmitting-receiving of current UE wraps the target BLER of each time transmission by being set; And, the present invention adopts sliding window mode to adjust exterior ring power control, can reduce because the harmful effect that the control of current UE exterior ring power is brought with respect to inner loop power control hysteresis, thereby can further improve the precision and the performance of exterior ring power control, make the success rate of transmitting-receiving bag transmission increase, channel utilization improves, and the performance of the target BLER of corresponding UE and UE throughput also further improves.
Description of drawings
Fig. 1 is the schematic flow sheet of exterior ring power control implementation method in the HSDPA technology of the present invention;
Fig. 2 is the schematic flow sheet of outer-loop power controlling method one embodiment in the HSDPA technology of the present invention.
Embodiment
Basic thought of the present invention is: the BLER of transmission objectives first, each time that current UE is set respectively retransmit the time window of target BLER and the control of HSDSCH exterior ring power, and whether set time window in adjust HSDSCH exterior ring power at the delivery time of the MAC-hs of HSDPCCH uploading feedback information bag apart from the time period of current time according to current UE; Further, can also revise current C QI value.
Here, the preferable selection of described re-transmission retransmits three times, if retransmit also not transmission success for three times then abandon transmission; Accordingly, before retransmitting for three times, need to be provided with respectively for the first time, for the second time and retransmit target BLER for the third time.
Concrete, obtain current UE in the delivery time of the used MAC-hs of HSDPCCH uploading feedback information bag time period apart from current time, according to institute's acquisition time section whether in the current time of current UE window, distinguish the exterior ring power control of adjusting current UE: if institute's acquisition time section is not in corresponding time window, then upgrade corresponding time window, and add up the feedback information that former time window lower limb current UE in the new time window lower limb time period sends the MAC-hs bag, when feedback information is ACK, the S value of current UE is added 1; When feedback information is NACK, the S value of current UE is deducted respective weight value K; After adjust finishing, the current feedback message that reports for current UE is adjusted the S value of current UE according to the situation of the time period of being obtained in described time window.If institute's acquisition time section is in corresponding time window, be ACK or NACK then according to the feedback message that reports, the adjusted value of the HSDSCH exterior ring power control of downward modulation or rise current UE is to adjust the control of HSDSCH exterior ring power by improving or reduce current channel condition.
Fig. 1 is the schematic flow sheet of exterior ring power control implementation method in the HSDPA technology of the present invention, and as shown in Figure 1, the realization flow of Poewr control method of the present invention may further comprise the steps:
Step 101: the HSDSCH exterior ring power control adjusted value that current UE in the HSDPA business is set is S, and initialization adjusted value S is 0, with the adjusted value S after the initialization as fiducial value to carrying out exterior ring power control adjustment in each UE transmitting-receiving packet procedures.
Step 102: the BLER of transmission objectives first of current UE is set respectively and retransmits target BLER.
Here, described re-transmission target BLER is to retransmit target BLER first after bust this first, after the n-1 time re-transmission failure, is the inferior re-transmission target BLER of n (n is natural number and n＞1).Rule of thumb, because the HSDPA re-transmission has redundancy versions (RV) gain, so the target BLER that once transmits before once the target BLER of transmission is less than after general.
Step 103: the adjustment time window size that the control of HSDSCH exterior ring power is set.
Here, described time window is a time interval, and the time window size can be set according to actual conditions, and generally rule of thumb value is provided with, and preferable this time window size that is provided with is 2s or 3s.
Step 104: obtain current UE in the delivery time of the used MAC-hs of HSDPCCH uploading feedback information bag time period, and judge institute's acquisition time section whether in the set time window of step 103 apart from current time, if, then execution in step 106; Otherwise, execution in step 105.
Step 105: upgrade the current time window, and add up the feedback information of former time window lower limb distance current UE transmission MAC-hs bag in the new time window lower limb time period; When feedback information is ACK, the S value of current UE is added 1, when feedback information is NACK, calculates weighted value K according to the respective objects BLER of the current MAC-hs bag of current UE, and the S value of current UE is deducted K; Adjust and finish the current feedback information execution in step 106 that the back reports current UE.
Step 106: current feedback information described in the determining step 104 is ACK or NACK, if ACK, then execution in step 108; If NACK, then execution in step 107.
Step 107: the target BLER according to the corresponding MAC-hs bag of the current feedback information of current UE calculates weighted value K, and the adjusted value S of the HSDSCH exterior ring power control of current UE is increased K, and execution in step 109 then.Wherein, weighted value K by formula (1) calculate:
Step 108: the adjusted value S that the HSDSCH exterior ring power of current UE is controlled subtracts 1.
Step 109: according to the adjusted value correction current C QI value of the current HSDSCH exterior ring power control of current UE, withdraw from this after the end and adjust, transmitting terminal carries out new transmitting-receiving bag transmission according to adjusted channel condition indication.
Among the present invention, the adjustment by to the control of HSDSCH exterior ring power obtains current adjusted value; CQI (CQI) value that resulting current adjusted value also can be used to current UE is reported is revised, to improve current channel condition.Concrete, the CQI value that current UE is reported deducts one of current adjusted value one percentage, can obtain revised CQI value; Can know current channel condition situation according to current C QI value.
Fig. 2 is outer-loop power controlling method one preferred embodiment in the HSDPA technology of the present invention, and in the present embodiment, number of retransmissions is three times, and as shown in Figure 2, the outer-loop power controlling method in the present embodiment may further comprise the steps:
Step 201: the adjusted value that the HSDSCH exterior ring power control of the current UE of supporting HSDPA is set is S, and initialization adjusted value S is 0, is that zero S is as the fiducial value to carrying out exterior ring power control adjustment in each UE transmitting-receiving packet procedures with adjusted value.
In the present embodiment, represent not adjust the control of HSDSCH exterior ring power during S=0; Downward modulation o'clock need to be represented in S＞0; S＜0 o'clock need to be represented to raise.
Step 202: the target BLER that the current UE transmission is set.
In the present embodiment, described target BLER comprises the target BLER of transmission first, the target BLER that retransmits for the first time, the target BLER that retransmits for the second time and the target BLER that retransmits for the third time.
Step 203: the time window size is adjusted in the HSDSCH exterior ring power control that current UE is set.
In the present embodiment, can establish current time window size and be 2s.
Step 204: obtain and calculate the time period of the delivery time of the used MAC-hs bag of feedback information that current UE reports at HSDPCCH apart from current time.
Step 205: the time period described in the determining step 204 whether in the set time window of step 203, if, then execution in step 208; Otherwise, execution in step 206.
Step 206: upgrade the lower limb of former time window, make it equal current time and deduct former time window size, obtain new time window.
Step 207: upgrade the current time window, and add up the feedback information of former time window lower limb distance current UE transmission MAC-hs bag in the new time window lower limb time period; When feedback information is ACK, the S value of current UE is added 1, when feedback information is NACK, calculates weighted value K according to the respective objects BLER of the current MAC-hs bag of current UE, and the S value of current UE is deducted K; After adjust finishing, the current feedback information execution in step 208 that current UE is reported.
Step 208: feedback information described in the determining step 205 is ACK or NACK, if ACK, then execution in step 209; If NACK, then execution in step 210.
Step 209: the adjusted value S of current UE is subtracted 1, execution in step 212.
Step 210: the used MAC-hs of uploading feedback information wraps pairing the number of transmissions in the obtaining step 205.
Step 211: obtain the corresponding target BLER of the used MAC-hs bag of uploading feedback information, with the adjusted value S increase weighted value K of current UE.Wherein, weighted value K by formula (1) calculate:
Step 212: the adjusted value correction current C QI value according to the current HSDSCH exterior ring power control of current UE, withdraw from this adjustment after the end, carry out transmission next time.
In the present embodiment, can also be according to the adjusted value correction current C QI value of the current HSDSCH exterior ring power control of current UE, to improve current channel condition.
In the present embodiment, suppose to retransmit three times at most with regard to transmission success, promptly described maximum retransmission is 3.Then can establish and retransmit target BLER first is 2%, and retransmitting target BLER for the second time is 1%, and retransmitting target BLER for the third time is 1 ‰.
In the present embodiment, if supposing current time is 0: 0: 30, the delivery time of MAC-hs described in the step 204 bag is 0: 0: 29, and this MAC-hs to wrap pairing the number of transmissions be 2, promptly to wrap pairing transmission be to retransmit first to this MAC-hs, and target BLER is 2%; Then the delivery time of MAC-hs described in the step 204 bag apart from the time period of current time be 1s.
Be (0: 0: 28,0: 0: 30) if suppose the described former time window of step 203, the described time period of step 204 is in the described time window of step 203 so.
When above-mentioned MAC-hs wraps pairing information when being ACK, the adjusted value S of current UE is adjusted into-1.
When above-mentioned MAC-hs wraps pairing information when being NACK, the current adjusted value S of current UE accumulates adjustment: the preceding adjusted value S+ corresponding K value of current adjusted value S=.
In the above-described embodiments, because through twice transmission ability transmission success, illustrate that current channel condition is bad, make the S value become bigger by above-mentioned adjustment, illustrate that adjusted channel condition is poorer, so corresponding transmitting terminal can only send than the little transmitting-receiving bag of current transmitting-receiving containing amount.Like this, help improving next transmission success rate and new channel utilization, and then make corresponding UE obtain comparatively ideal target BLER UE throughput.
If suppose that the delivery time of the bag of MAC-hs described in the step 204 is 0: 0: 27, and suppose that current time still is 0: 0: 30, so then the delivery time of MAC-hs described in the step 204 bag apart from the time period of current time be 3s, surpass the described former time window size 2s of step 203.
So, in the step 206, step of updating 203 Central Plains time window lower limbs, that is: 0 fen 28s is as the new lower limb of time window when current time being deducted former time window size gained 0; So, the feedback information exterior ring power adjusted value in 0: 0: 27 to 0: 0: 28 be shifted out from the exterior ring power adjusted value of current UE.Concrete, add up the feedback information that current UE transmission MAC-hs wraps in 0: 0: 27 to 0: 0: 28; When feedback information is ACK, the S value of current UE is added 1, when feedback information is NACK, calculates weighted value K according to the respective objects BLER of the current MAC-hs bag of current UE, and the S value of current UE is deducted K; After adjust finishing, the current feedback information execution in step 208 that current UE is reported.
In the foregoing description, adjusted S value illustrates that less than 0 new channel condition improves, and helps improving new channel utilization and transmitting-receiving next time bag transmission success rate, and then makes corresponding UE obtain comparatively ideal target BLER UE throughput.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1, a kind of implementation method of exterior ring power control is characterized in that, comprises step:
A., high-speed downlink shared channel HSDSCH exterior ring power is set adjusts time window;
B. whether set time window in carry out HSDSCH exterior ring power adjustment at the delivery time of High-Speed Dedicated Physical Control Channel HSDPCCH uploading feedback information medium used thereof access control sublayer MAC-hs bag apart from the time period of current time according to current user equipment UE, this returns step b after adjusting and finishing.
2, the implementation method of exterior ring power control according to claim 1 is characterized in that described method further comprises: initialization is provided with the adjusted value S of the HSDSCH exterior ring power control of current UE in the HSDPA business.
3, the implementation method of exterior ring power according to claim 1 and 2 control is characterized in that, the described time period, described step b further comprised in described time window the time:
B1, be just to confirm ACK or negative acknowledgment NACK to the feedback information of transmitting terminal, adjust the adjusted value of the HSDSCH exterior ring power control of current UE according to the receiving terminal of current transmitting-receiving bag.
4, the implementation method of exterior ring power according to claim 1 and 2 control is characterized in that, the described time period, described step b further comprised step not in described time window the time:
B2, renewal current time window, and the adjusted value of the HSDSCH exterior ring power control of adjustment current UE; After adjusting end, the current feedback information that current UE reports is carried out the step of described time period in described time window.
5, the implementation method of exterior ring power control according to claim 3 is characterized in that when described feedback information was ACK, described step b1 further comprised: the adjusted value of the HSDSCH exterior ring power control of downward modulation current UE.
6, the implementation method of exterior ring power control according to claim 3 is characterized in that when described feedback information was NACK, described step b1 further comprised: the adjusted value that raises the HSDSCH exterior ring power control of current UE.
7, the implementation method of exterior ring power control according to claim 4, it is characterized in that, upgrade current time window step among the described step b2 and further comprise: current time is deducted time point that current time window size obtains as the new lower limb of time window.
8, the implementation method of exterior ring power control according to claim 4, it is characterized in that the adjusted value of adjusting the HSDSCH exterior ring power control of current UE among the described step b2 further comprises: the feedback information of adding up former time window lower limb distance current UE transmission MAC-hs bag in the new time window lower limb time period;
When feedback information is ACK, the S value of current UE is added 1; When feedback information was NACK, the respective objects BLER that wraps according to the current MAC-hs of current UE calculated weighted value K, and the S value of current UE is deducted K.
9, the implementation method of exterior ring power control according to claim 6 is characterized in that described method further comprises: the target block error rate BLER that the current UE transmission is set;
The adjusted value of the HSDSCH exterior ring power control of described rise current UE further comprises: the respective objects BLER according to the current MAC-hs bag of current UE calculates weighted value K, and the adjusted value of the current HSDSCH exterior ring power control of current UE is increased K.
10, the implementation method of exterior ring power according to claim 9 control is characterized in that described method also comprises: according to the current channel quality indicator CQI value of adjusted value correction of the HSDSCH exterior ring power of current UE.
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| CNA200810094693XA CN101277134A (en) | 2008-05-07 | 2008-05-07 | Method for implementing exterior loop power control |
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| CNA200810094693XA CN101277134A (en) | 2008-05-07 | 2008-05-07 | Method for implementing exterior loop power control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483501B (en) * | 2009-02-20 | 2011-07-20 | 北京北方烽火科技有限公司 | Method for adaptively regulating modulation encoding mode based on CINR |
| CN108092755A (en) * | 2017-12-26 | 2018-05-29 | 广东欧珀移动通信有限公司 | Parameter regulation means and device |
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2008
- 2008-05-07 CN CNA200810094693XA patent/CN101277134A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101483501B (en) * | 2009-02-20 | 2011-07-20 | 北京北方烽火科技有限公司 | Method for adaptively regulating modulation encoding mode based on CINR |
| CN108092755A (en) * | 2017-12-26 | 2018-05-29 | 广东欧珀移动通信有限公司 | Parameter regulation means and device |
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