CN101640556A - Method and device for power control - Google Patents
Method and device for power control Download PDFInfo
- Publication number
- CN101640556A CN101640556A CN200810117350A CN200810117350A CN101640556A CN 101640556 A CN101640556 A CN 101640556A CN 200810117350 A CN200810117350 A CN 200810117350A CN 200810117350 A CN200810117350 A CN 200810117350A CN 101640556 A CN101640556 A CN 101640556A
- Authority
- CN
- China
- Prior art keywords
- error rate
- block error
- interference ratio
- target signal
- signal interference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention discloses a method for power control, which comprises the steps of: calculating the residual block error rate according to hybrid automatic retransmission request information sent by a base station; adjusting the target signal-to-interference ratio according to the residual block error rate and a preset block error rate threshold value; sending the adjusted target signal-to-interference ratio to the base station; and using the received and adjusted target signal-to-interference ratio for inner-loop power control on the transmitting power of an enhanced uplink physical channel by the base station. The embodiment of the invention discloses a power control device. The use of the method and the device can ensure that the BLER of E-TFC selected at UE side has thesimilar block error rate with the BLER of reference E-TFC, thereby improving the accuracy of outer-loop power control, and better ensuring the convergence of the outer-loop power control.
Description
Technical field
The present invention relates to power control techniques, refer in particular to a kind of method and apparatus of power control.
Background technology
In order to adapt to the demand of mobile network's high speed data service, in synchronous code division multiple access of time-division (TD-SCDMA) system, introduced ascending reinforced special channel (E-DCH).Wherein, the key technology of being introduced comprises: Adaptive Modulation and Coding (AMC), the technology such as up fast dispatch of mixing automatic repeat requests (HARQ) and being controlled by base station (Node B).
In the above-mentioned technology of introducing, radio network controller (RNC) generally will be configured reference encoder speed and the power excursion that characterizes with reference to E-DCH transformat combination (E-TFC), the reference E-TFC that will configure then sends to subscriber equipment (UE), the UE side will be selected corresponding E-TFC according to received reference E-TFC, make the selected E-TFC of UE side have similar Block Error Rate (BLER) with reference to E-TFC, thereby guarantee quality of data communication to above-mentioned.But when the residing environment of UE and above-mentioned with reference to the residing environment of E-TFC when incomplete same, then the BLER of the selected E-TFC of UE side may can not get guaranteeing.At this moment, need solve the problems referred to above by the method for exterior ring power control.
In the prior art, power control techniques can be divided into inner loop power control and two big classes of exterior ring power control according to the power control effect.Described exterior ring power control is mainly used to according to the quality of service requirement under the specific environment, produces the required SIR Target of inner loop power control; Described inner loop power control then is mainly used to resist channel fading and loss, makes the SIR of receiving end signal or power reach specific desired value.
In the prior art, can come part to address the above problem based on the HARQ power excursion (power offset) in the HARQ combinations of attributes (profile) in the present protocol frame.But have following shortcoming based on the external circule power control method of HARQpower offset: the time delay that (1) is adjusted is long, is generally second time delay of level; (2) scope of Tiao Zhenging is narrower, is generally 0～6dB; (3) the step-length precision of Tiao Zhenging is relatively poor, and the least unit of step-length is 1dB.
In addition, also introduced a kind of E-DCH outer-loop power controlling method in broadband CDMA frequency divided duplex in the prior art (WCDMA FDD) system.In the method, the mode of the target signal interference ratio (SIR Target) that RNC can be by changing Dedicated Physical Control Channel (DPCCH) makes the selected E-TFC of UE side have similar Block Error Rate to above-mentioned with reference to E-TFC.But, because the TD-SCDMA system exists than big-difference on E-DCH with above-mentioned WCDMA FDD system, and do not exist DPCCH in the TD-SCDMA system, but with the closed loop component replacement DPCCH of transmitting power (Pe-base).Therefore, in the above-mentioned WCDMAFDD system based on the outer-loop power controlling method of the SIR Target of DPCCH and be not suitable for the TD-SCDMA system.
Summary of the invention
In view of this, the main purpose of the embodiment of the invention is to provide a kind of method and apparatus of power control, thereby improves the precision of exterior ring power control.
For achieving the above object, the technical scheme in the embodiment of the invention is achieved in that
A kind of method of power control, this method comprises:
Calculate residual Block Error Rate according to the hybrid automatic retransmission request information that the base station sends;
Adjust the target signal interference ratio according to described residual Block Error Rate and default Block Error Rate threshold value;
Adjusted target signal interference ratio is sent to the base station;
The base station is used for received adjusted target signal interference ratio the transmitting power of the uplink physical channel that strengthens is carried out inner loop power control.
A kind of output control device also is provided in the embodiments of the invention, and this device comprises: computing module, adjusting module and sending module;
Described computing module is used for calculating residual Block Error Rate according to the hybrid automatic retransmission request information that the base station sends; Described residual Block Error Rate is transferred to described adjusting module;
Described adjusting module is used for adjusting the target signal interference ratio according to described residual Block Error Rate and default Block Error Rate threshold value; Adjusted target signal interference ratio is transferred to described sending module;
Described sending module is used for described adjusted target signal interference ratio is sent to the base station.
A kind of method and apparatus of power control is provided in the embodiments of the invention in summary.In above-mentioned method and apparatus, because the residual BLER of HARQ information calculations that RNC can report according to NodeB, and according to residual BLER and BLER thresholding adjustment SIR Target, and by adjusted SIR Target is sent to NodeB, make the BLER of the selected E-TFC of UE side have similar Block Error Rate by NodeB according to this adjusted SIR Target to BLER with reference to E-TFC, thereby improved the precision of exterior ring power control, guaranteed the convergence of exterior ring power control better.
Description of drawings
Fig. 1 is the flow chart of the method for power control in the embodiment of the invention.
Fig. 2 is the structural representation of output control device in the embodiment of the 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 for power control in the embodiment of the invention.As shown in Figure 1, the method for power control comprises step as described below in the embodiment of the invention:
In an embodiment of the present invention, NodeB will report HARQ information in the E-DCH Frame, this HARQ information to comprise HARQ failure indication information, the information such as number of retransmissions in the time of can also comprising the HARQ success at least to RNC.RNC is according to received above-mentioned HARQ information, can calculate the residual BLER of medium access control entity-d stream (MAC-d flow) in each transmission, wherein, residual BLER when available parameter rBLER (i) represents to carry out the i time transmission, the residual BLER when then carrying out the i time transmission can calculate by formula as described below:
The number of the MAC-es entity protocol Data Unit (MAC-es PDU) of error of transmission takes place when wherein, n represents to carry out the i time transmission; The number of the MAC-esPDU of correct transmission when m represents to carry out the i time transmission.Above-mentioned n and m can obtain from the HARQ information that above-mentioned NodeB sent.
In an embodiment of the present invention, RNC will be according to the residual BLER of the MAC-es PDU of aforementioned calculation, and utilizes residual BLER and the relation that sets in advance the BLER threshold value, and the value of SIR Target is done corresponding adjustment, and concrete method of adjustment is as described below:
1) if the residual BLER of above-mentioned MAC-es PDU more than or equal to default BLER threshold value, then increases SIR Target;
2) if the residual BLER of above-mentioned MAC-es PDU less than default BLER threshold value, then reduces SIR Target.
Owing in the present user plane protocol, do not support RNC that SIR Target is sent to Node B, and in existing chain of command agreement, NodeB also can't receive above-mentioned SIR Target from RNC.Therefore, in an embodiment of the present invention, will make amendment, increase corresponding marker bit, and make NodeB to know SIR Target entrained in this control frame according to this flag bit to the structure of the exterior ring power control frame in existing 3GP TS 25.331 agreements.
For example, in an embodiment of the present invention, RNC can be to a kind of exterior ring power control frame, and promptly the structure of Frame Protocol (FP) frame is made amendment, increase corresponding marker bit, and adjusted SIR Target is sent to Node B by amended FP frame (promptly having increased the FP frame of corresponding flag bit).The above-mentioned modification that the structure of FP frame is carried out comprises:
1) Radio Resource in 3GP TS 25.331 agreements is controlled the initial value that carries SIRTarget in (RRC) signaling.For example, can in the RRC signaling, increase uplink physical channel (E-PUCH) the target signal interference ratio cell of an enhancing newly, and in this cell, carry the initial value of SIR Target.The structure of E-PUCH target signal interference ratio cell that should be newly-increased is as shown in the table:
Table 1
| ＞1.28Mcps?TDD | ??REL-7 | ||||
| ＞＞expectation received power level (PRXdes_base) | ??MP | ??Integer ??(-112..-50by?step?of ??1) | ??dBm.Reference ??desired?power ??level?for?E-PUCH | ??REL-7 | |
| The up sir value of＞＞＞(UL target SIR) | ??MP | ??Integer(-120...-58by ??step?of?1)dBm | ??In?dB | ??REL-7 |
2) in order to make NodeB can discern above-mentioned signaling of carrying SIR Target initial value, then also need external circule power control control frame structure is made amendment, promptly in frame structure, add a flag bit.For example, in 32 (bit) spare bits from above-mentioned external circule power control control frame, select one or more bit position (Flag) as a token of, and identify the exterior ring power control whether this external circule power control control frame is applied to E-PUCH by the value that this flag bit is set, make NodeB can confirm whether this external circule power control control frame to be applied to the exterior ring power control of E-PUCH according to the value of this flag bit.For example, can make an appointment, when this flag bit is 1 bit,, represent that then this external circule power control control frame is applied to E-PUCH if when the value of this flag bit is 1 (being Flag=1); And if the value of this flag bit represents that then this external circule power control control frame shall not be applied to E-PUCH when being 0 (being Flag=0).In addition, in an embodiment of the present invention, this flag bit can be any one or a plurality of bit among 32 (bit) idle bit.
By above-mentioned step 101～103, RNC can will adjust SIR Target according to the HARQ information that NodeB sent, and adjusted SIR Target is sent to Node B, thereby has improved the precision of exterior ring power control.
In an embodiment of the present invention, can produce the required SIR Target of inner loop power control by the described method in above-mentioned step 101～103, and this SIR Target sent to NodeB, thereby make NodeB to carry out inner loop power control to the transmitting power of E-PUCH according to this SIR Target.
For example, in an embodiment of the present invention, NodeB can detect the signal interference ratio (SIR) from subscriber equipment (UE) earlier, and measured sir measurement value and received SIR Target compared, and form transmitting power control (TPC according to result relatively, Tranamit Power Control) bit, at down channel the TPC bit is sent to UE then, notice UE adjusts its transmitting power, make the SIR of UE approach SIR Target, thereby make the selected E-TFC of UE side have similar Block Error Rate, reach the purpose of power control to the reference E-TFC that RNC is disposed.
By using the method for above-mentioned power control, can make that the adjustment time delay is shorter, be generally the time delay of 10 Milliseconds; Wider range of adjusting is generally-8.3dB～17.2dB; The step-length precision of adjusting is higher, and the least unit of step-length is 0.1dB.
Fig. 2 is the structural representation of output control device in the embodiment of the invention.As shown in Figure 2, the output control device in the embodiment of the invention comprises: computing module, adjusting module and sending module.
Computing module is used for calculating residual Block Error Rate according to the hybrid automatic retransmission request information that the base station sends; Described residual Block Error Rate is transferred to described adjusting module;
Adjusting module is used for adjusting the target signal interference ratio according to described residual Block Error Rate and default Block Error Rate threshold value; Adjusted target signal interference ratio is transferred to described sending module;
Sending module is used for described adjusted target signal interference ratio is sent to the base station.
Wherein, described adjusting module also comprises: judging unit and adjustment unit.
Judging unit is used for when described residual Block Error Rate during more than or equal to described Block Error Rate threshold value, sends to described adjustment unit to increase instruction; When described residual Block Error Rate during, send to described adjustment unit and to reduce instruction less than described Block Error Rate threshold value;
Adjustment unit is used for increasing the target signal interference ratio according to received increase instruction, and the target signal interference ratio after increasing is transferred to described sending module; The instruction that reduces according to received reduces the target signal interference ratio, and the target signal interference ratio after will reducing is transferred to described sending module.
The said method and the device that are provided among the application of the invention embodiment, the residual BLER of HARQ information calculations that RNC can report according to NodeB, and according to residual BLER and BLER thresholding adjustment SIR Target, and by adjusted SIR Target is sent to NodeB, make the BLER of the selected E-TFC of UE side have similar Block Error Rate by NodeB according to this adjusted SIR Target to BLER with reference to E-TFC, thereby improved the precision of exterior ring power control, guaranteed the convergence of exterior ring power control better.
The above is preferred embodiment of the present invention only, is 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 (9)
1, a kind of method of power control is characterized in that this method comprises:
Calculate residual Block Error Rate according to the hybrid automatic retransmission request information that the base station sends;
Adjust the target signal interference ratio according to described residual Block Error Rate and default Block Error Rate threshold value;
Adjusted target signal interference ratio is sent to the base station;
The base station is used for received adjusted target signal interference ratio the transmitting power of the uplink physical channel that strengthens is carried out inner loop power control.
2, method according to claim 1 is characterized in that, described residual Block Error Rate calculates according to following formula:
Wherein, rBLER (i) is the residual BLER when carrying out the i time transmission; N is the number that the MAC-es entity protocol Data Unit of error of transmission takes place when carrying out the i time transmission; M is the number of the MAC-es entity protocol Data Unit of correct transmission when carrying out the i time transmission; Described n and m obtain from described HARQ information.
3, method according to claim 1 is characterized in that, describedly adjusts the target signal interference ratio according to described residual Block Error Rate and default Block Error Rate threshold value and comprises:
When described residual Block Error Rate during, increase the target signal interference ratio more than or equal to described Block Error Rate threshold value;
When described residual Block Error Rate during, reduce the target signal interference ratio less than described Block Error Rate threshold value.
4, method according to claim 1 is characterized in that, describedly adjusted target signal interference ratio is sent to the base station comprises:
In the exterior ring power control frame, increase flag bit, adjusted target signal interference ratio is sent to the base station by the exterior ring power control frame behind the described increase flag bit.
5, method according to claim 4 is characterized in that, this method also comprises:
In radio resource control signaling, increase the uplink physical channel target signal interference ratio cell of an enhancing, carry the initial value of target signal interference ratio in this cell.
6, method according to claim 4 is characterized in that, the described flag bit that increases in the exterior ring power control frame comprises:
In the spare bits from described external circule power control control frame, select position as a token of, one or more positions.
7, method according to claim 4 is characterized in that, this method also comprises:
Identify the exterior ring power control of the uplink physical channel whether described external circule power control control frame be applied to strengthen by the value that described flag bit is set.
8, a kind of output control device is characterized in that, this device comprises: computing module, adjusting module and sending module;
Described computing module is used for calculating residual Block Error Rate according to the hybrid automatic retransmission request information that the base station sends; Described residual Block Error Rate is transferred to described adjusting module;
Described adjusting module is used for adjusting the target signal interference ratio according to described residual Block Error Rate and default Block Error Rate threshold value; Adjusted target signal interference ratio is transferred to described sending module;
Described sending module is used for described adjusted target signal interference ratio is sent to the base station.
9, device according to claim 8 is characterized in that, described adjusting module comprises: judging unit and adjustment unit;
Described judging unit is used for when described residual Block Error Rate during more than or equal to described Block Error Rate threshold value, sends to described adjustment unit to increase instruction; When described residual Block Error Rate during, send to described adjustment unit and to reduce instruction less than described Block Error Rate threshold value;
Described adjustment unit is used for increasing the target signal interference ratio according to received increase instruction, and the target signal interference ratio after increasing is transferred to described sending module; The instruction that reduces according to received reduces the target signal interference ratio, and the target signal interference ratio after will reducing is transferred to described sending module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810117350A CN101640556A (en) | 2008-07-29 | 2008-07-29 | Method and device for power control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810117350A CN101640556A (en) | 2008-07-29 | 2008-07-29 | Method and device for power control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101640556A true CN101640556A (en) | 2010-02-03 |
Family
ID=41615374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810117350A Pending CN101640556A (en) | 2008-07-29 | 2008-07-29 | Method and device for power control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101640556A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977431A (en) * | 2010-10-22 | 2011-02-16 | 上海华为技术有限公司 | Method, device and system for controlling terminal power based on HSUPA |
| CN102208967A (en) * | 2010-03-31 | 2011-10-05 | 中兴通讯股份有限公司 | Non-adaptive repeat power control method and device for long term evolution (LTE) terminal |
| CN102246567A (en) * | 2011-04-12 | 2011-11-16 | 华为技术有限公司 | Method, apparatus and radio network controller for outer loop power control processing |
| WO2011160529A1 (en) * | 2010-06-21 | 2011-12-29 | 中兴通讯股份有限公司 | Outer loop power control method and device |
| WO2013159595A1 (en) * | 2012-04-26 | 2013-10-31 | 华为技术有限公司 | Inner-loop power control processing method and system, and radio network controller |
-
2008
- 2008-07-29 CN CN200810117350A patent/CN101640556A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208967A (en) * | 2010-03-31 | 2011-10-05 | 中兴通讯股份有限公司 | Non-adaptive repeat power control method and device for long term evolution (LTE) terminal |
| WO2011120252A1 (en) * | 2010-03-31 | 2011-10-06 | 中兴通讯股份有限公司 | Method and device for controlling non-adaptive retransmission power |
| CN102208967B (en) * | 2010-03-31 | 2014-04-09 | 中兴通讯股份有限公司 | Non-adaptive repeat power control method and device for long term evolution (LTE) terminal |
| RU2515601C1 (en) * | 2010-03-31 | 2014-05-20 | 3Те Корпорэйшен | Method and device for power control in non-adaptive retransmission |
| US8848569B2 (en) | 2010-03-31 | 2014-09-30 | Zte Corporation | Method and device for power control in non-adaptive retransmission |
| WO2011160529A1 (en) * | 2010-06-21 | 2011-12-29 | 中兴通讯股份有限公司 | Outer loop power control method and device |
| CN101977431A (en) * | 2010-10-22 | 2011-02-16 | 上海华为技术有限公司 | Method, device and system for controlling terminal power based on HSUPA |
| CN101977431B (en) * | 2010-10-22 | 2013-06-12 | 上海华为技术有限公司 | Method, device and system for controlling terminal power based on HSUPA |
| CN102246567A (en) * | 2011-04-12 | 2011-11-16 | 华为技术有限公司 | Method, apparatus and radio network controller for outer loop power control processing |
| CN102246567B (en) * | 2011-04-12 | 2013-10-09 | 华为技术有限公司 | Method, apparatus and radio network controller for outer loop power control processing |
| WO2013159595A1 (en) * | 2012-04-26 | 2013-10-31 | 华为技术有限公司 | Inner-loop power control processing method and system, and radio network controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200275381A1 (en) | Uplink power control method and apparatus | |
| US7106700B2 (en) | Method of controlling quality of service of CDMA system using dynamic adjustment of parameters representing transmitting properties concerning quality of service | |
| CN102143568B (en) | Power control method and base station | |
| EP1645051B1 (en) | Secondary link power control in a wireless communication network | |
| EP1944879B1 (en) | Implement method for power control of the high speed shared control channel and the high speed shared information channel | |
| RU2388147C2 (en) | Outer transmission power control loop for f-dpch | |
| US20100062799A1 (en) | Mobile communication system, base station, mobile station, and communication control method | |
| CN101237260B (en) | Uplink power control device and method | |
| US8462682B2 (en) | Method and arrangement for separate channel power control | |
| US20060084459A1 (en) | Outer loop power control of user equipment in wireless communication | |
| WO2003100992A2 (en) | Multiple level power control command signaling | |
| CN101180812B (en) | Method for scaling an e-dch channel | |
| CN1450743A (en) | Method for controlling upline control channel power in soft switching of high speed data packet insertion system | |
| CN104254121A (en) | PUSCH (physical uplink shared channel) power control method and PUSCH power control device | |
| CN100550679C (en) | HSUPA exterior ring power control implementation method | |
| CN104105182A (en) | Method and base station for realizing inner loop closed-loop power control | |
| CN101640556A (en) | Method and device for power control | |
| KR20090108641A (en) | Transmission rate control method, radio base station, and radio line control station | |
| CN102340858B (en) | Method and device for setting target SINR (Signal-to-Interference and Noise Ratio) in PUSCH (Physical Uplink Shared Channel) power control | |
| US6963752B1 (en) | Method and apparatus for setting transmit power control command energy | |
| WO2020094118A1 (en) | Data transmission method, sending terminal device, and receiving terminal device | |
| US20050232177A1 (en) | Method for transmission power control of a multicast signal | |
| CN101132201A (en) | Method for obtaining uplink signal-channel quality at network side of high-speed grouping access system | |
| CN100358379C (en) | Method for controlling upward sending speed in WCDMA system | |
| US20060270435A1 (en) | Method of controlling power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100203 |