CN101635588B - Power control method and device - Google Patents
Power control method and device Download PDFInfo
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- CN101635588B CN101635588B CN2008101172137A CN200810117213A CN101635588B CN 101635588 B CN101635588 B CN 101635588B CN 2008101172137 A CN2008101172137 A CN 2008101172137A CN 200810117213 A CN200810117213 A CN 200810117213A CN 101635588 B CN101635588 B CN 101635588B
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- code check
- effective code
- pdsch
- transmitting power
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Abstract
The embodiment of the invention discloses a power control method, which comprises that: a base station computes an effective code rate currently supported by user equipment according to CQI reported by a user equipment side; and the base station adjusts the transmission power of an HS-PDSCH according to the continuous changing condition of the effective code rate and a preset effective code rate threshold. The embodiment of the invention also discloses a power control device. The method and the device can reduce the transmission power of the HS-PDSCH as possible to reduce interference caused on adjacent cells by the HS-PDSCH under the condition that the quality of service of the HS-PDSCH is guaranteed, thus the power control on the HS-PDSCH in an FDD mode is realized; and simultaneously, the method and the device also can improve the overall performance of a system.
Description
Technical field
The present invention relates to mobile communication technology, refer in particular to method and device that a kind of power is controlled.
Background technology
For adapting to the demand of mobile network's high speed data service, introduced high speed downlink packet access (HSDPA) technology in TD SDMA (TD-SCDMA) system, and increased high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) newly, thereby the availability of frequency spectrum, capacity and the data throughout of system have been improved.Key technology in the HSDPA technology comprises: the descending fast dispatch of Adaptive Modulation and Coding (AMC), mixed automatic retransfer request (HARQ) and base station (NodeB) control.Wherein, the descending fast dispatch of NodeB not only comprises the scheduling of speed and the scheduling of physical resource (for example, number of time slot and code channel situation), also comprises based on subscriber equipment (UE) receiving quality report coming control to down transmitting power.And the purpose of the control of down transmitting power is: control HS-PDSCH to the interference of adjacent area and the coverage that effectively improves HS-PDSCH.For example, when UE is in center of housing estate, channel quality is better, because NodeB has adopted the intelligent antenna beam forming technique at down direction, if so the HS-PDSCH that NodeB controls adopts higher transmitting power, HS-PDSCH will produce unnecessary extra interference to adjacent co-frequency cell, so NodeB this moment needs suitably to reduce the transmitting power of HS-PDSCH; And when UE was in the border of residential quarter, channel quality was relatively poor, if the HS-PDSCH that Node B controls adopts lower transmitting power, can't keep the service quality to the user, so NodeB this moment needs suitably to improve the transmitting power of HS-PDSCH.In summary, NodeB need to optimize the power control to HS-PDSCH, thereby under the prerequisite of the service quality that guarantees HS-PDSCH, the transmitting power of reduce HS-PDSCH.
In the prior art, proposed the Poewr control method of the HS-PDSCH under a kind of Frequency Division Duplexing (FDD) (FDD) pattern, can be applicable in the WCDMA system.But the technical problem of the required solution of the method is the throughput that maximizes the residential quarter, rather than under the prerequisite of the service quality that guarantees HS-PDSCH, the interference that reduce HS-PDSCH causes neighbor cell; And, measure and report in the signal quality indication (CQI) of HS-PDSCH due to fdd mode and time division duplex (TDD) pattern and also have larger difference on mechanism; Therefore, the HS-PDSCH Poewr control method under existing fdd mode and the power that is not suitable for the HS-PDSCH under tdd mode are controlled.
In addition, because DPCH (DPCH) and HS-PDSCH there are differences in the processing of signal, the DPCH downlink channel power control method in therefore existing TD-SCDMA system can not be directly used in to be controlled the power of HS-PDSCH.
Summary of the invention
In view of this, the main purpose of the embodiment of the present invention is to provide a kind of method and device of power control, thereby realizes the HS-PDSCH power control under fdd mode.
For achieving the above object, the technical scheme in the embodiment of the present invention is achieved in that
A kind of method that provides power to control in embodiments of the invention, the method comprises:
Effective code check of the current support of subscriber equipment is calculated according to the signal quality indication CQI that user equipment side reports in the base station; Described current supported effective code check is:
λ
e＝S
e/R
e，
Wherein, λ
eBe the current supported effective code check of subscriber equipment; S
eThe data block size RTBS that reports for user equipment side; R
eBe the physical channel bit number of exporting at the physical channel mapping block in high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH code multiplexing flow process;
The transmitting power of high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH is adjusted according to the continuous situation of change of described effective code check and default effective code check threshold value in the base station.
A kind of output control device is provided in embodiments of the invention, and this device comprises: computing module and adjusting module;
Described computing module, the signal quality indication CQI that is used for reporting according to user equipment side calculates effective code check of the current support of subscriber equipment; The effective code check that calculates is sent to described adjusting module;
Described current supported effective code check is:
λ
e＝S
e/R
e，
Wherein, λ
eBe the current supported effective code check of subscriber equipment; S
eThe data block size RTBS that reports for user equipment side; R
eBe the physical channel bit number of exporting at the physical channel mapping block in high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH code multiplexing flow process;
Described adjusting module is used for according to the continuous situation of change of received effective code check and default effective code check threshold value, adjusts the transmitting power of HS-PDSCH.
In summary, the method and the device that provide a kind of power to control in embodiments of the invention.In above-mentioned method, because NodeB can calculate the current supported effective code check of UE according to the CQI that the UE side reports, and according to the continuous situation of change of described effective code check and default effective code check threshold value, adjust the transmitting power of HS-PDSCH, therefore can guarantee under HS-PDSCH channel service quality condition, the interference that reduce HS-PDSCH channel emission power causes neighbor cell to reduce the HS-PDSCH channel, thus the HS-PDSCH power of realization under fdd mode is controlled.
Description of drawings
Fig. 1 is the flow chart of the method that in the embodiment of the present invention, power is controlled.
Fig. 2 is the schematic diagram of performing step 102.
Fig. 3 is the schematic diagram of output control device in the embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is the flow chart of the method that in the embodiment of the present invention, power is controlled.As shown in Figure 1, the method for the control of the power in the embodiment of the present invention comprises step as described below:
In an embodiment of the present invention, UE will be on the resource of once distributing on NodeB, measure current channel quality, for example, the indexs such as CIR (CIR), then according to measured current channel quality, use formula (1) as described below to calculate current single transmission throughput:
Single transmission throughput=(1-BLER) * RTBS (1)
Wherein, BLER is Block Error Rate, and RTBS is the data block size.
When UE (for example calculates a dispatching cycle, 20 milliseconds) in after all single transmission throughput, then should be in dispatching cycle the corresponding modulating mode of maximum single throughput of transmissions (RMF) and data block size (RTBS) report NodeB by CQI.Therefore, comprise at least in the CQI that the received UE side of NodeB reports: RMF and RTBS.
Then, RMF and RTBS that NodeB can report according to above-mentioned UE side, calculate the current supported effective code check of this UE by formula as described below (2):
λ
e＝S
e/R
e （2）
Wherein, λ
eBe the current supported effective code check of UE; S
eBe the RTBS that the UE side reports, depend on that the UE side is for the estimation of channel quality; R
eBe the physical channel bit number of exporting at the physical channel mapping block in HS-PDSCH code multiplexing flow process, depend on number of time slot, code channel number and corresponding modulation system that HS-PDSCH distributes.
According to effective code check that said method obtains, can reflect the CIR situation of UE side, namely larger effective code check is corresponding to channel condition preferably, and less effective code check is corresponding to relatively poor channel condition.
In addition, in an embodiment of the present invention, the UE side reports CQI one time in each dispatching cycle, thereby makes NodeB can accurately follow the tracks of the variation of UE side channel quality.
In an embodiment of the present invention, NodeB can be by following the tracks of the situation of change of above-mentioned effective code check, and whether the transmitting power that judge HS-PDSCH of current NodeB side in conjunction with effective code check threshold value of setting in advance be fit to the current channel quality of UE side, and the transmitting power of adjustment HS-PDSCH.For example, can adjust the transmitting power of HS-PDSCH according to method as described below:
1) the above-mentioned effective code check that, calculates as NodeB at least N continuous time greater than predefined effective code check threshold value λ
maxThe time, show that the current transmitting power of the HS-PDSCH of NodeB side is too high with respect to UE side channel quality, therefore NodeB will reduce the transmitting power of HS-PDSCH, namely reduce the transmitting power of every code channel in HS-PDSCH, and the reduction step-length of described transmitting power is p_downstep.Wherein, N, λ
maxBe with p_downstep the parameter that sets in advance according to practical situations, and N is the integer greater than zero.
2) the above-mentioned effective code check that, calculates as NodeB at least continuous N time less than predefined effective code check threshold value λ
m=(λ
max-λ
Hyes) time, show that the current transmitting power of the HS-PDSCH of NodeB side is too low with respect to UE side channel quality, therefore NodeB will improve the transmitting power of HS-PDSCH, namely improve the transmitting power of every code channel in HS-PDSCH, and the raising step-length of described transmitting power is p_upstep.Wherein, λ
HyesBe sluggish parameter, and M, λ
max, λ
HyesBe with p_upstep the parameter that sets in advance according to practical situations, and M is the integer greater than zero.
3) the above-mentioned effective code check that, calculates as NodeB had not both had N continuous inferior to predefined effective code check threshold value λ
max, do not have continuous N inferior to predefined effective code check threshold value λ yet
m=(λ
max-λ
Hyes) time, show that the current transmitting power of HS-PDSCH of NodeB side is suitable with respect to UE side channel quality, so NodeB will keep the transmitting power of HS-PDSCH constant, namely keep in HS-PDSCH the transmitting power of every code channel constant.
In addition, in an embodiment of the present invention, also can set in advance minimum emissive power p_min, the above-mentioned effective code check that calculates as NodeB at least N continuous time greater than predefined effective code check threshold value λ
maxThe time, if the current transmitting power of HS-PDSCH has been less than or equal to p_min, the reduction step-length of described transmitting power is p_downstep=0, namely no longer reduces the current transmitting power of HS-PDSCH; Wherein, the above-mentioned requirement that to satisfy radio frequency and joint-detection that arranges to p_min.In like manner, in an embodiment of the present invention, also can set in advance maximum transmission power p_max, the above-mentioned effective code check that calculates as NodeB at least continuous N time less than predefined effective code check threshold value (λ
max-λ
Hyes) time, if the current transmitting power of HS-PDSCH more than or equal to p_max, the raising step-length of described transmitting power is p_upstep=0, namely no longer improves the current transmitting power of HS-PDSCH; Wherein, the above-mentioned service quality that must satisfy edge customer that arranges to p_max.
Below in conjunction with instantiation, the specific implementation of above step 102 is described in detail.In order better technical scheme of the present invention to be described, in an embodiment of the present invention, can set in advance two counters, be referred to as respectively the first counter and the second counter, the initial value of the reading of these two counters is 0.Fig. 2 is the schematic diagram of performing step 102, as shown in Figure 2, in embodiments of the present invention, can be by step performing step 102 as described below:
Whether step 10203 judges the reading of the first counter more than or equal to N, and at least whether N continuous is inferior to predefined effective code check threshold value λ namely to judge effective code check
maxIf so, execution in step 10204; Otherwise, return to execution in step 101.
Whether step 10209 judges the reading of the second counter more than or equal to M, and at least whether continuous N is inferior to predefined effective code check threshold value λ namely to judge effective code check
m=(λ
max-λ
Hyes).If so, execution in step 10210; Otherwise, return to execution in step 101.
In addition, in an embodiment of the present invention, the above-mentioned effective code check that calculates as NodeB at least N continuous time greater than predefined effective code check threshold value λ
maxThe time, if the current transmitting power of HS-PDSCH has been less than or equal to p_min, the reduction step-length of described transmitting power is p_downstep=0, namely no longer reduces the current transmitting power of HS-PDSCH.In like manner, the above-mentioned effective code check that calculates as NodeB at least continuous N time less than predefined effective code check threshold value λ
mThe time, if the current transmitting power of HS-PDSCH more than or equal to p_max, the raising step-length of described transmitting power is p_upstep=0, namely no longer improves the current transmitting power of HS-PDSCH.
Fig. 3 is the schematic diagram of output control device in the embodiment of the present invention.As shown in Figure 3, the output control device in the embodiment of the present invention comprises: computing module and adjusting module.
Computing module, the CQI that is used for reporting according to the UE side calculates effective code check of the current support of UE; The effective code check that calculates is sent to described adjusting module;
Adjusting module is used for according to the continuous situation of change of received effective code check and default effective code check threshold value, adjusts the transmitting power of HS-PDSCH.
Wherein, described adjusting module also comprises: judging unit and adjustment unit.
Judging unit, N continuous is inferior to predefined effective code check threshold value λ at least to be used for working as received effective code check
maxThe time, send to described adjustment unit and reduce power instruction; At least continuous N is inferior to predefined effective code check threshold value λ when received effective code check
m=(λ
max-λ
Hyes) time, send to described adjustment unit and improve power instruction;
Adjustment unit is used for according to received reduction power instruction, reduces the transmitting power of HS-PDSCH, namely reduces the transmitting power of every code channel in HS-PDSCH; According to received raising power instruction, improve the transmitting power of HS-PDSCH, namely improve the transmitting power of every code channel in HS-PDSCH.
The said method that provides in the application of the invention embodiment and device, can guarantee under HS-PDSCH channel service quality condition, the interference that reduce HS-PDSCH channel emission power causes neighbor cell to reduce the HS-PDSCH channel, thus the HS-PDSCH power of realization under fdd mode is controlled; Simultaneously, also can improve the overall performance of system, for example, can improve the service quality of cell throughout and edge UE.
The above is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the method that power is controlled, is characterized in that, the method comprises:
Effective code check of the current support of subscriber equipment is calculated according to the signal quality indication CQI that user equipment side reports in the base station; Described current supported effective code check is:
λ
e＝S
e/R
e，
Wherein, λ
eBe the current supported effective code check of subscriber equipment; S
eThe data block size RTBS that reports for user equipment side; R
eBe the physical channel bit number of exporting at the physical channel mapping block in high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH code multiplexing flow process;
The transmitting power of HS-PDSCH is adjusted according to the continuous situation of change of described effective code check and default effective code check threshold value in the base station.
2. method according to claim 1, is characterized in that, effective code check that the described CQI that reports according to user equipment side calculates the current support of subscriber equipment comprises:
Subscriber equipment calculates current single transmission throughput according to measured current channel quality;
Subscriber equipment reports the base station with the corresponding modulating mode of maximum single throughput of transmissions and data block size in dispatching cycle by CQI;
The current supported effective code check of this subscriber equipment is calculated according to the modulating mode in received CQI and data block size in the base station.
3. method according to claim 2, is characterized in that, described current single transmission throughput is calculated according to following formula:
Single transmission throughput=(1-BLER) * RTBS,
Wherein, BLER is Block Error Rate, and RTBS is the data block size.
4. method according to claim 1, is characterized in that, and is described according to the continuous situation of change of described effective code check and default effective code check threshold value, and the transmitting power of adjusting HS-PDSCH comprises:
When described effective code check when N continuous is time greater than predefined first effective code check threshold value at least, the transmitting power of base station reduction HS-PDSCH;
When described effective code check when continuous N is time less than predefined second effective code check threshold value at least, the transmitting power of base station raising HS-PDSCH;
Wherein, N and M are the integer greater than zero.
5. method according to claim 4, is characterized in that, when N continuous was time greater than predefined first effective code check threshold value at least, the transmitting power of base station reduction HS-PDSCH comprised when described effective code check:
The first counter is set, and the initial value of the reading of this first counter is 0;
During greater than predefined first effective code check threshold value, the reading of the first counter adds 1 when described effective code check; Otherwise, the reading zero clearing of the first counter;
During more than or equal to N, the base station reduces the transmitting power of HS-PDSCH, the reading zero clearing of the first counter when the reading of the first counter.
6. method according to claim 4, is characterized in that, when continuous N was time less than predefined second effective code check threshold value at least, the transmitting power of base station raising HS-PDSCH comprised when described effective code check:
The second counter is set, and the initial value of the reading of this second counter is 0;
During less than predefined second effective code check threshold value, the reading of the second counter adds 1 when described effective code check; Otherwise, the reading zero clearing of the second counter;
During more than or equal to M, the transmitting power of HS-PDSCH, the reading zero clearing of the second counter are improved in the base station when the reading of the second counter.
7. method according to claim 4, is characterized in that, the method also comprises:
When the current transmitting power of HS-PDSCH is less than or equal to the minimum emissive power that sets in advance, no longer reduce the current transmitting power of HS-PDSCH;
More than or equal to the maximum transmission power that sets in advance, no longer improve the current transmitting power of HS-PDSCH when the current transmitting power of HS-PDSCH.
8. an output control device, is characterized in that, this device comprises: computing module and adjusting module;
Described computing module, the signal quality indication CQI that is used for reporting according to user equipment side calculates effective code check of the current support of subscriber equipment; The effective code check that calculates is sent to described adjusting module;
Described current supported effective code check is:
λ
e＝S
e/R
e，
Wherein, λ
eBe the current supported effective code check of subscriber equipment; S
eThe data block size RTBS that reports for user equipment side; R
eBe the physical channel bit number of exporting at the physical channel mapping block in high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH code multiplexing flow process; Described adjusting module is used for according to the continuous situation of change of received effective code check and default effective code check threshold value, adjusts the transmitting power of HS-PDSCH.
9. device according to claim 8, is characterized in that, described adjusting module also comprises: judging unit and adjustment unit;
Described judging unit is used for when described effective code check when N continuous is time greater than predefined first effective code check threshold value at least, to described adjustment unit transmission reduction power instruction; When continuous N is time less than predefined second effective code check threshold value at least, send raising power instruction to described adjustment unit when received effective code check;
Described adjustment unit is used for according to received reduction power instruction, reduces the transmitting power of HS-PDSCH; According to received raising power instruction, improve the transmitting power of HS-PDSCH;
Wherein, N and M are the integer greater than zero.
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|---|---|---|---|
| CN2008101172137A CN101635588B (en) | 2008-07-25 | 2008-07-25 | Power control method and device |
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|---|---|---|---|
| CN2008101172137A CN101635588B (en) | 2008-07-25 | 2008-07-25 | Power control method and device |
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|---|---|
| CN101635588A CN101635588A (en) | 2010-01-27 |
| CN101635588B true CN101635588B (en) | 2013-05-08 |
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| CN2008101172137A Expired - Fee Related CN101635588B (en) | 2008-07-25 | 2008-07-25 | Power control method and device |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998418B (en) * | 2009-08-11 | 2013-07-24 | 电信科学技术研究院 | Method, system and device for improving network covering property |
| CN102378255B (en) * | 2010-08-24 | 2014-07-16 | 中兴通讯股份有限公司 | Method and device for improving transmission performance of physical downlink control channel (PDCCH) |
| CN102487511B (en) * | 2010-12-02 | 2015-04-08 | 鼎桥通信技术有限公司 | HSUPA (High-speed uplink packet access) neighbor interference control method and radio network controller |
| CN102026351A (en) * | 2010-12-31 | 2011-04-20 | 大唐移动通信设备有限公司 | Method and device for controlling power of downlink closed loop in long-term evolution system |
| CN102065534B (en) * | 2011-01-31 | 2015-04-29 | 华为技术有限公司 | Power adjustment method and device |
| CN103249130B (en) * | 2012-02-07 | 2016-01-20 | 鼎桥通信技术有限公司 | HSDPA rapid power control method in a kind of TD-SCDMA system and base station |
| CN103327599A (en) * | 2012-03-22 | 2013-09-25 | 华为技术有限公司 | Method for reducing channel disturbance and base station |
| CN103428769B (en) | 2012-05-16 | 2016-11-23 | 华为技术有限公司 | A kind of data distribution transmission, Apparatus and system |
| GB2571769B (en) * | 2018-03-08 | 2020-09-30 | Tcl Communication Ltd | Network control |
| WO2020103056A1 (en) * | 2018-11-21 | 2020-05-28 | Oppo广东移动通信有限公司 | Power density adjusting method, device and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114851A (en) * | 2006-07-24 | 2008-01-30 | 大唐移动通信设备有限公司 | Power control method and device for HSDPA |
| CN101373994A (en) * | 2007-08-21 | 2009-02-25 | 大唐移动通信设备有限公司 | Power control method and device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114851A (en) * | 2006-07-24 | 2008-01-30 | 大唐移动通信设备有限公司 | Power control method and device for HSDPA |
| CN101373994A (en) * | 2007-08-21 | 2009-02-25 | 大唐移动通信设备有限公司 | Power control method and device |
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