CN1808935A - Method of downlink power control during discontinuous downlink emission in radio communication system - Google Patents
Method of downlink power control during discontinuous downlink emission in radio communication system Download PDFInfo
- Publication number
- CN1808935A CN1808935A CN 200610004040 CN200610004040A CN1808935A CN 1808935 A CN1808935 A CN 1808935A CN 200610004040 CN200610004040 CN 200610004040 CN 200610004040 A CN200610004040 A CN 200610004040A CN 1808935 A CN1808935 A CN 1808935A
- Authority
- CN
- China
- Prior art keywords
- power control
- power
- subscriber equipment
- base station
- descending
- 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.)
- Granted
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
This invention discloses one wireless communication system upper non-continuous power control method, which comprises the following steps: a, base station uses upper non-continuous erudition time to receive special burst linkage communication quality; b, base station judges results to generate relative power control orders according to the a upper linkage; c, base station generates power control order to send user device; d, user device computes results through the power control orders or upper data recovery erudition initial upper signal compensation volume; e, user device adjusts upper special erudition power or upper data row power according to step d results.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to the method for controlling downlink power in descending discontinuous when emission in a kind of wireless communication system.
Background technology
The closed power control technology is widely used in UTRA (Universal Telecommunication RadioAccess) FDD and UTRA (Universal Telecommunication Radio Access) TDD3.84/1.28Mcps system, in the closed power controlling mechanism, subscriber equipment/base station is according to periodically adjusting transmitting power from the entrained power control command of the based on feedback link of base station/user equipment.
In the downlink power control process, subscriber equipment receives from after the signal of base station, whether needs to increase or reduce the transmitting power of base station according to SIR (signal interference ratio) the measured value decision to downstream signal, and produces corresponding power control command.Subscriber equipment passes to the base station with power control command by up feedback channel, and the base station receives power control command can suitably adjust down transmitting power according to power control command.
For the UTRATDD system, when if the high level of base station or subscriber equipment does not have data to offer coded combination transmission channel (CCTrCH) in Transmission Time Interval (TTI), base station and subscriber equipment can be that unit implements discontinuous emission (DTX) with the coded combination transmission channel.When discontinuous emission acts on certain CCTrCH, this CCTrCH stops conventional data transmission, change into certain cycle emission special burst (SBs, Special Bursts), the up SB emission cycle is called SBGP (special burst generationperiod), and the descending SB emission cycle is called SBSP (special burst scheduling period).The enforcement of discontinuous emission eats dishes without rice or wine to disturb, save equipment energy consumption to minimizing and implement between the frequency of wireless system/and switch between system positive role is arranged.
For the UTRATDD3.84/1.28Mcps system, when discontinuous emission acts on descending CCTrCH, can exert an influence for descending closed-loop power control.Because descending CCTrCH is in discontinuous emitting state, in descending discontinuous when emission,, the base station can only receive SBs with the cycle of SBGP radio frames, and at this moment the base station can't be according to according to SBs power during the closed-loop fashion control DTX of routine and the initial downlink data power after the DTX end.
For the downlink power control mode in the descending discontinuous emission process, determine that descending SBs or downlink data recover the method for the initial downstream signal transmitting power in back if adopt the mode of base station open loop power control, the power control error is bigger, and the reliability that the down-link performance during the descending DTX and link are kept has a negative impact.
Summary of the invention
Method for controlling downlink power when the technical problem that the present invention solves provides descending discontinuous emission in a kind of wireless communication system can improve the downlink power control precision.
In order to address the above problem, the method for controlling downlink power in the wireless communication system provided by the invention during descending discontinuous emission specifically may further comprise the steps:
Step 1, subscriber equipment utilize the special burst that receives during the descending discontinuous emission to judge linkage communication quality;
Step 2, subscriber equipment produces corresponding power control command according to the downlink communication quality judged result in the step 1;
Step 3, subscriber equipment will be issued the base station on the power control command that generate;
Step 4, the power back-off amount that descending special burst or downlink data recover the initial downstream signal in emission back is calculated by the power control command of sending out on the subscriber equipment in the base station;
Step 5, according to the result of calculation of step 4, transmitting power or downlink data that descending special burst is adjusted in the base station recover the initial downlink signal transmitting power in emission back.
Can see by technique scheme, in communication process, the downlink power control process when method of the present invention has realized descending DTX with the closed loop means.The open loop downlink power control method of method of the present invention during with respect to descending DTX, the downlink power control precision when having strengthened descending discontinuous emission in the wireless communication system.Especially for SBGP cycle of descending discontinuous emission hour, above-mentioned Poewr control method is with respect to open loop downlink power control method, the down-link performance during to descending DTX improves a lot.
Description of drawings
Fig. 1 is the flow chart of the inventive method
Embodiment
Below in conjunction with accompanying drawing specific implementation of the present invention is made and to be further described.
Be the flow chart of the inventive method as shown in Figure 1, concrete steps are as follows:
Step 1: subscriber equipment utilizes the SBs that receives during the descending DTX to judge linkage communication quality;
Step 2: subscriber equipment is judged the corresponding power control command of generation according to the downlink communication quality in the step 1;
Step 3: subscriber equipment will be issued the base station on the power control command that generate;
Step 4: the power back-off amount that descending SBs or downlink data recover the initial downstream signal in back is calculated by the power control control command of sending out on the subscriber equipment in the base station;
Step 5: according to the result of calculation of step 4, transmitting power or downlink data that descending SBs is suitably adjusted in the base station recover the initial downlink signal transmitting power in back.
Said method is implemented respectively the CCTrCH of each descending DTX in the system by base station, subscriber equipment.
Above-mentioned algorithm steps is implemented to finish the process of uplink closed loop the CCTrCH of each descending DTX in the system circularly continuously by base station, subscriber equipment.
Above-mentioned step 1,2 can have multiple specific implementation method, now is exemplified below.
Scheme one:
Subscriber equipment judges that linkage communication quality comprises that the power of judging down link need increase still minimizing in the step 1.Specifically comprise: if the down link signal interference ratio that subscriber equipment is measured judges then that less than the target signal interference ratio power of down link should increase; If the down link signal interference ratio that subscriber equipment is measured equals the target signal interference ratio, judge that then the power of down link should remain unchanged; If the down link signal interference ratio that subscriber equipment is measured judges then that greater than the target signal interference ratio power of down link should reduce.
Step 2 comprises specifically that if the power of down link should increase then subscriber equipment produces the power control command Up (1) that increases power; If the power of down link should remain unchanged, then subscriber equipment produces the power control command Do nothing (0) that power remains unchanged; If the power of down link should reduce, then subscriber equipment produces the power control command Down (1) that reduces power.
Scheme two:
Subscriber equipment judges that linkage communication quality comprises that subscriber equipment directly calculates the quantity that the power of down link need be adjusted, i.e. the down link SIR of the power adjustment=target SIR of down link-measurement in the step 1;
Step 2 specifically comprises if the power adjustment of down link is P, and the power control step-length that base station and subscriber equipment are decided through consultation in advance is Step, then
If greater than 0, then subscriber equipment produces the power control command Up (1) of a N continuous increase power to the absolute value of P more than or equal to Step and P value;
If less than 0, then subscriber equipment produces the power control command Down (1) of a N continuous minimizing power to the absolute value of P more than or equal to Step and P value;
If the absolute value of P is less than Step, then subscriber equipment produces the power control command Do nothing (0) that power remains unchanged;
Wherein
|| be the signed magnitude arithmetic(al) symbol,
Be last rounding operation symbol.
In the above-mentioned step 3, comprise that specifically each Up power control command that step 2 is produced is mapped as physical layer power control bit TCPbit (1) respectively, each Down power control command that step 2 is produced is mapped as physical layer power control bit TCPbit (1) respectively, and each Do nothing power control command that step 2 is produced is mapped as physical layer power control bit TCPbit (0) respectively.As if the power control bit number that the physical layer power control bit number through above-mentioned mapping gained can send less than physical layer, insufficient section is supplied with TCPbit (0).Mapping and supply after physical layer power control bit send to the base station according to position and the modulation format that physical layer requires.
The wireless system that has only TCPbit (1) and TCPbit (1) for physical layer power control bits such as UTRATDD 1.28Mcps, the method of step 3 comprises that also each Up power control command that step 2 is produced is mapped as physical layer power control bit TCPbit (1) respectively, each Down power control command of step 2 generation is mapped as the power control bit TCPbit (1) of physical layer respectively, each Do nothing power control command that step 2 is produced is mapped to a radio frames (frame), the power control bit of two subframes (subframe) of this radio frames is respectively the form of TCPbit (1) and TCPbit (1), and replaces issuing of Donothing (0) power control command with issuing of this frame.As if the power control bit number that the physical layer power control bit number through above-mentioned mapping gained can send less than physical layer, insufficient section is supplied with the sequence that TCPbit (1) and TCPbit (1) replace.Mapping and supply after physical layer power control bit send to the base station according to position and the modulation format that physical layer requires.
Have only TCPbit (1) and TCPbit (1) and DTX with radio frames (frame for physical layer power control bits such as UTRA TDD 1.28Mcps, 10ms) for cycle physical layer power control commands with subframe (subframe, the system that 5ms) issues, it is that the power control command of a N continuous non-Donothing and N are when being odd number that the method for step 3 also comprises when what produce in the step 2, preceding N-1 power control commands of this N continuous power control commands is mapped as N-1 physical layer power control bit, last power control commands of this N continuous power control commands is mapped as two same physical layer power control bits.As if the power control bit number that the physical layer power control bit number through above-mentioned mapping gained can send less than physical layer, insufficient section is supplied with the sequence that TCPbit (1) and TCPbit (1) replace.Mapping and supply after physical layer power control bit send to the base station according to position and the modulation format that physical layer requires.
In the above-mentioned step 4, the method of " the power back-off amount that descending SBs or downlink data recover the initial downstream signal in emission back is calculated by the power control control command of sending out on the subscriber equipment in the base station " comprising: the base station receives the physical layer power control bit of sending out on the subscriber equipment, and the computational methods of the compensation rate of this descending power are:
Wherein M for from subscriber equipment according to the sub-frame of uplink at last descending power control commands that SBs calculated in base station and the related physical layer mapping place number of subframes in the scope of the previous sub-frame of uplink of this downlink; TPCbit
iThe physical layer power control bit that receives i sub-frame of uplink in the scope of this descending previous sub-frame of uplink according to the sub-frame of uplink at last descending power control commands that SBs calculated in base station and related physical layer mapping place from subscriber equipment for the base station; Step for step 2 in base station and the subscriber equipment identical value of power control step-length Step of deciding through consultation in advance.
In the above-mentioned steps 5, the method for " according to the result of calculation of step 4, transmitting power or downlink data that descending SBs is suitably adjusted in the base station recover the initial downlink signal transmitting power in back " comprising:
P
dl，i＝P
dl，i-1+SumTPC
P wherein
Dl, iBeing this downlink signal transmitting power, may be the descending power of first physical code channel of the descending power of this descending SBs or the CCTrCH that downlink data recovers initial downstream signal place, back; P
Dl, i-1It is the transmitting power of descending SBs of last time; SumTPC is the descending power compensation rate of calculating in the step 4.
Claims (18)
1. the method for controlling downlink power during descending discontinuous emission in the wireless communication system is characterized in that, may further comprise the steps:
Step 1, subscriber equipment utilize the special burst that receives during the descending discontinuous emission to judge linkage communication quality;
Step 2, subscriber equipment produces corresponding power control command according to the downlink communication quality judged result in the step 1;
Step 3, subscriber equipment will be issued the base station on the power control command that generate;
Step 4, the power back-off amount that descending special burst or downlink data recover the initial downstream signal in emission back is calculated by the power control command of sending out on the subscriber equipment in the base station;
Step 5, according to the result of calculation of step 4, transmitting power or downlink data that descending special burst is adjusted in the base station recover the initial downlink signal transmitting power in emission back.
2. the method for claim 1 is characterized in that, subscriber equipment judges that linkage communication quality comprises that the power of judging down link need increase still minimizing in the described step 1.
3. method as claimed in claim 2 is characterized in that, subscriber equipment judges that linkage communication quality comprises in the described step 1:
If the down link signal interference ratio that subscriber equipment is measured judges then that less than the target signal interference ratio power of down link should increase;
If the down link signal interference ratio that subscriber equipment is measured equals the target signal interference ratio, judge that then the power of down link should remain unchanged;
If the down link signal interference ratio that subscriber equipment is measured judges then that greater than the target signal interference ratio power of down link should reduce.
4. as claim 2 or 3 described methods, it is characterized in that described step 2 specifically comprises:
If the power of down link should increase, then subscriber equipment produces the power control command that increases power;
If the power of down link should remain unchanged, then subscriber equipment produces the power control command that power remains unchanged;
If the power of up link should reduce, then subscriber equipment produces the power control command that reduces power.
5. the method for claim 1 is characterized in that, subscriber equipment judges that linkage communication quality comprises that subscriber equipment directly calculates the quantity that the power of down link need be adjusted in the described step 1.
6. method as claimed in claim 5, it is characterized in that subscriber equipment judges that linkage communication quality comprises that the difference of the down link signal interference ratio that subscriber equipment measures according to target signal interference ratio and subscriber equipment calculates the quantity that the power of down link need be adjusted in the described step 1.
7. as claim 5 or 6 described methods, it is characterized in that described step 2 specifically comprises:
The power adjustment of setting line link is P, and the power control step-length that base station and subscriber equipment are decided through consultation in advance is Step, then
If greater than 0, then subscriber equipment produces the power control command of a N continuous increase power to the absolute value of P more than or equal to Step and P value;
If less than 0, then subscriber equipment produces the power control command of a N continuous minimizing power to the absolute value of P more than or equal to Step and P value;
If the absolute value of P is less than Step, then subscriber equipment produces the power control command that power remains unchanged;
Wherein
|| be the signed magnitude arithmetic(al) symbol,
Be last rounding operation symbol.
8. the method for claim 1, it is characterized in that, described step 3 comprises that specifically subscriber equipment then is mapped as the power control bit of physical layer with described power control command, and physical layer power control bit is sent to the base station according to position and the modulation format that physical layer requires.
9. method as claimed in claim 8 is characterized in that, the power control bit number that the physical layer power control bit number of described mapping gained can send less than physical layer, and then insufficient section is supplied with the constant power control bit of holding power.
10. method as claimed in claim 9, it is characterized in that, if have only the power control bit of power lifting/lowering in the described wireless communication system, and subscriber equipment need to go up the power control commands of sending out be that holding power is when constant, subscriber equipment is mapped to a radio frames with this power control command, the power control bit of two subframes of this radio frames is respectively the form of the power control bit that power control bit that power rises and power falls, and sends out with going up of this frame and to replace going up of the constant power control command of holding power to send out.
11. method as claimed in claim 10, it is characterized in that, if through the power control bit number that the physical layer power control bit number of described mapping gained can send less than physical layer, the sequence that the power control bit that power control bit that insufficient section rises with power and power fall replaces is supplied.
12. method as claimed in claim 9, it is characterized in that, if have only the power control bit of power lifting/lowering in the described wireless communication system, and discontinuous emission is cycle and the physical layer power control commands issues with subframe with the radio frames, subscriber equipment need be gone up the power control command of sending out N power lifting/lowering, when wherein N is odd number, preceding N-1 power control commands of this N continuous power control commands is mapped as N-1 physical layer power control bit, last power control commands of this N continuous power control commands is mapped as two same physical layer power control bits.
13. method as claimed in claim 12, it is characterized in that, if through the power control bit number that the physical layer power control bit number of described mapping gained can send less than physical layer, the sequence that the power control bit that power control bit that insufficient section rises with power and power fall replaces is supplied.
14. the method for claim 1, it is characterized in that, described step 4 rated output compensation rate comprise from subscriber equipment according to the sub-frame of uplink at the last descending power control commands place that special burst calculated, base station in the scope of the previous sub-frame of uplink of this downlink, the power control commands that the base station is sent out on each subframe in above-mentioned scope according to subscriber equipment is calculated corresponding this down transmitting power adjustment amount.
15. method as claimed in claim 14 is characterized in that, the formula of described rated output compensation rate is:
Wherein M for from subscriber equipment according to the sub-frame of uplink at last descending power control commands that special burst calculated in base station and the related physical layer mapping place number of subframes in the scope of this descending previous sub-frame of uplink; TPCbit
iFor the base station from subscriber equipment according to the physical layer power control bit that receives the sub-frame of uplink at last descending power control commands that special burst calculated in base station and related physical layer mapping place i the subframe in the scope of this descending previous sub-frame of uplink; Step is the power control step-length that base station and subscriber equipment are decided through consultation in advance.
16. method as claimed in claim 15 is characterized in that, the formula that power is adjusted in described step 5 base station is:
P
dl，i＝P
dl，i-1+SumTPC
P wherein
Dl, iBeing this downlink signal transmitting power, is the descending power of first physical code channel of the descending power of this descending special burst or the coded combination transmission channel that downlink data recovers initial downstream signal place, emission back; P
Dl, i-1It is the transmitting power of descending special burst of last time; SumTPC is the descending power compensation rate of calculating in the step 4.
17. the method for claim 1 is characterized in that, described Poewr control method is by base station, subscriber equipment the coded combination transmission channel of each descending discontinuous emission in the system to be implemented respectively.
18. the method for claim 1, it is characterized in that described Poewr control method is by base station, subscriber equipment the coded combination transmission channel of each descending discontinuous emission in the system to be implemented circularly continuously to finish the process of downlink closed-loop power control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100040409A CN100407593C (en) | 2006-01-24 | 2006-01-24 | Method of downlink power control during discontinuous downlink emission in radio communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100040409A CN100407593C (en) | 2006-01-24 | 2006-01-24 | Method of downlink power control during discontinuous downlink emission in radio communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808935A true CN1808935A (en) | 2006-07-26 |
| CN100407593C CN100407593C (en) | 2008-07-30 |
Family
ID=36840658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100040409A Expired - Fee Related CN100407593C (en) | 2006-01-24 | 2006-01-24 | Method of downlink power control during discontinuous downlink emission in radio communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100407593C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281624A (en) * | 2010-06-11 | 2011-12-14 | 中兴通讯股份有限公司 | Control command word transmission method in upstream discontinuous transmission, apparatus thereof and base station |
| CN101312367B (en) * | 2007-05-23 | 2012-05-02 | 鼎桥通信技术有限公司 | Method and apparatus for controlling transmission power during downlink interrupted transmission |
| CN101488785B (en) * | 2008-01-15 | 2012-09-05 | 中兴通讯股份有限公司 | Downlink power control method for TD-SCDMA system |
| CN101282145B (en) * | 2007-04-06 | 2013-02-13 | 鼎桥通信技术有限公司 | Method and apparatus for controlling transmission power and synchronization in TD-SCDMA system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5603096A (en) * | 1994-07-11 | 1997-02-11 | Qualcomm Incorporated | Reverse link, closed loop power control in a code division multiple access system |
| US6421327B1 (en) * | 1999-06-28 | 2002-07-16 | Qualcomm Incorporated | Method and apparatus for controlling transmission energy in a communication system employing orthogonal transmit diversity |
| EP1435142B1 (en) * | 2001-10-11 | 2008-04-09 | Interdigital Technology Corporation | System and method for utilizing unused capacity in the data field of a special burst |
| CN101959293B (en) * | 2001-10-19 | 2013-07-24 | 英特尔公司 | User equipment for improving power savings during full DTX mode of operation in the downlink |
| US7808944B2 (en) * | 2003-11-21 | 2010-10-05 | Interdigital Technology Corporation | Wireless communication method and apparatus for controlling the transmission power of downlink and uplink coded composite transport channels based on discontinuous transmission state values |
| CN1691533A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | A power control method |
-
2006
- 2006-01-24 CN CN2006100040409A patent/CN100407593C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101282145B (en) * | 2007-04-06 | 2013-02-13 | 鼎桥通信技术有限公司 | Method and apparatus for controlling transmission power and synchronization in TD-SCDMA system |
| CN101312367B (en) * | 2007-05-23 | 2012-05-02 | 鼎桥通信技术有限公司 | Method and apparatus for controlling transmission power during downlink interrupted transmission |
| CN101488785B (en) * | 2008-01-15 | 2012-09-05 | 中兴通讯股份有限公司 | Downlink power control method for TD-SCDMA system |
| CN102281624A (en) * | 2010-06-11 | 2011-12-14 | 中兴通讯股份有限公司 | Control command word transmission method in upstream discontinuous transmission, apparatus thereof and base station |
| CN102281624B (en) * | 2010-06-11 | 2015-06-10 | 中兴通讯股份有限公司 | Control command word transmission method in upstream discontinuous transmission, apparatus thereof and base station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100407593C (en) | 2008-07-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101399580B (en) | Power with the channel of multiple format in communication system controls | |
| CN100336314C (en) | Method and apparatus for multi-channel reverse link outer-loop power control | |
| CN1110156C (en) | Method and device for performing distributed forward power control | |
| CN100407588C (en) | Channel quality feedback for power control in a CDMA system | |
| CA2430144A1 (en) | Apparatus and method for providing optimal adaptive forward error correction in data communications | |
| CN102932110B (en) | The integrated processes of a kind of Adaptive Modulation and Coding and adaptive threshold decision | |
| WO2005091833A3 (en) | Adjustment of target signal-to-interference in outer loop power control for wireless communication systems | |
| CN1550074A (en) | Method and apparatus for power control in a communication system | |
| CN101584128A (en) | Power control for compressed mode in WCDMA system | |
| CN1823479A (en) | Method and apparatus for communications of data in a communication system | |
| CN107734622A (en) | Ascending power control method and device | |
| CN1808935A (en) | Method of downlink power control during discontinuous downlink emission in radio communication system | |
| CN1808936A (en) | Method of uplink power control during discontinuous uplink emission in radio communication system | |
| CN1184762C (en) | Method for controlling external loop power in WCDMA system | |
| CN102611521B (en) | Adjusting method for channel quality indicator (CQI) | |
| CN1391773A (en) | Power control method and radio system | |
| CN1512800A (en) | Self adaption step-size power control system and method for radio communication system | |
| CN113595692B (en) | AMC-HARQ method based on dynamic threshold optimization design | |
| CN101072055B (en) | Downlink power control method at downlink discontinuous transmission for wireless communication system | |
| US8195217B2 (en) | Method and apparatus for controlling power of uplink physical channel | |
| CN1777059A (en) | Power control method for wireless communication system | |
| EP1537684A1 (en) | Power control during retransmission | |
| CN1232057C (en) | Method based on packet exchange service for setting up downlink emitting power | |
| CN1862986A (en) | Detecting method of closed loop power controlling delay in wireless mobile communication system | |
| CN1522075A (en) | Power control method of end-to-end direct communication of NB TDD CDMA mobile communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080730 Termination date: 20150124 |
|
| EXPY | Termination of patent right or utility model |