CN103118422B - A kind of ascending power control method, device, base station and system - Google Patents
A kind of ascending power control method, device, base station and system Download PDFInfo
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- CN103118422B CN103118422B CN201110363921.0A CN201110363921A CN103118422B CN 103118422 B CN103118422 B CN 103118422B CN 201110363921 A CN201110363921 A CN 201110363921A CN 103118422 B CN103118422 B CN 103118422B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 230000009467 reduction Effects 0.000 claims description 3
- 230000009897 systematic effect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of ascending power control method, and suitable for WCDMA system, methods described includes：After base station receives the 1st subframe of radio frames, signal to noise ratio SIR estimation is carried out using the 1st subframe；If the SIR estimation result of the 1st subframe is not above default thresholding, the target signal to noise ratio SIRtarget of the user terminal is reduced in the subframe behind Transmission Time Interval TTI.So as to reduce the transmission power of HSUPA user terminals.The invention also discloses a kind of uplink power control device, base station and system, by means of the invention it is possible to effectively reduce the transmission power of HSUPA user terminals, uplink interference is reduced, improves systematic function and capacity.
Description
Technical field
The present invention relates to wireless communication field, ascending power control method, dress in more particularly to a kind of WCDMA system
Put, base station and system.
Background technology
It is well known that WCDMA is a self-interference system, the signal of each user terminal in cell is to other users
All it is interference for terminal.Therefore how Power Control is effectively carried out, before the service quality of user terminal requirement is ensured
Put, at utmost reduce transmission power, reduce system interference so as to increase power system capacity, be a pass in WCDMA system
Key technology.
Enhanced uplink dedicated transmission channel (Enhanced UL DCH, abbreviation E- are introduced in R6 standard agreements
DCH), the introducing of the channel causes the upstream rate of user terminal greatly to improve, and peak rate can reach 5.76Mbps.Branch
The technology for holding the channel is referred to as high-speed uplink packet access technique (High Speed Uplink Packet Access, abbreviation
HSUPA).But with the raising of upstream rate, the transmission power of user terminal is also correspondingly improved.Provided in R6 standard agreements,
No matter whether user terminal has data transmission, DCCH (Dedicated Physical Control Channel, letter
Claim DPCCH), to be all transmitted always, therefore, the cell where the user terminal of those support HSUPA technologies, i.e.,
The user terminal for making in the same time while carrying out data upload is not a lot, but because DPCCH is being sent always, and by
Being more than the SIRtarget of speech business in the target signal to noise ratio (abbreviation SIRtarget) of HSUPA business (means HSUPA business
Transmission power also greater than speech business), so as to which wideband received power (Received in the channel width of cell can be caused
Signal Strength Indicator, abbreviation RSSI) rise, other user terminals are disturbed and influenceed.
CPC (the permanent online techniques of Continuous Packet Connectivity) is introduced in R7 standard agreements,
Provide that if terminal does not have data transmission in the technology, DPCCH can carry out discontinuous hair according to certain rule
Send, so as to reduce the uplink interference in cell, lift the capacity of cell.But have in commercial net do not support largely at present
The business terminal of CPC technologies, and the base station for having part old type tube does not support CPC functions yet, CPC technologies can not be used to improve system
Performance and capacity.
The content of the invention
The technical problem to be solved in the present invention is to provide the ascending power control method in a kind of WCDMA system, device, base
Stand and system, do not support terminal or the base station of CPC functions for those, effectively reduce the transmission power of HSUPA user terminals.
According to an aspect of the present invention, the invention provides a kind of ascending power control method, this method to include following step
Suddenly：
After base station receives the 1st subframe of radio frames, signal to noise ratio SIR estimation is carried out using the 1st subframe；If the 1st
The SIR estimation result of individual subframe is not above default thresholding, then in Transmission Time Interval TTI behind subframe in reduce
The SIRtarget of the user terminal.
According to another aspect of the present invention, present invention also offers a kind of uplink power control device, the device to include
Receiving module, estimation block, judge module and adjusting module, wherein：
Receiving module is used to receive radio frames；
After the 1st subframe of the estimation block for receiving radio frames, the 1st subframe is utilized to carry out signal to noise ratio SIR estimation；
Judge module is used to judge whether the SIR estimation result of the 1st subframe exceedes default thresholding；
Adjusting module be used for when the SIR estimation result of the 1st subframe is not above default thresholding, in the TTI after
The SIRtarget of the user terminal is reduced in the subframe in face.
According to a further aspect of the invention, present invention also offers a kind of base station, the base station to include above-mentioned ascending power
Control device.
According to a further aspect of the invention, present invention also offers a kind of WCDMA system, it is whole that the system includes user
End and the base station for including above-mentioned uplink power control device.
, can be for not supporting terminal or the base station of CPC functions, by reducing signal to noise ratio mesh using embodiments of the invention
Scale value is effectively reduced the transmission power of user terminal, in the cell more than HSUPA user terminals, can control the RSSI of cell
Lifting, reduce user terminal between interfere, lifting system and cell capacity.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of ascending power control method flow chart that the embodiment of the present invention 1 provides；
Fig. 2 is target signal to noise ratio in the correlation technique that the embodiment of the present invention 1 provides and power method of the invention
SIRtarget contrast table；
Fig. 3 is a kind of function structure chart for uplink power control device that the embodiment of the present invention 3 provides.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below
Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Embodiment 1
A kind of ascending power control method flow chart that the embodiment of the present invention 1 as shown in Figure 1 provides；
Step S102, after base station receives the 1st subframe of radio frames, the special control of up-link of the 1st subframe is utilized
Channel (E-DCH Dedicated Physical Control Channel, abbreviation EDPCCH) processed carries out SIR estimation；
Step S104, base station judges whether the SIR estimation result of the 1st subframe exceedes default thresholding, if it does, holding
Row step S105, otherwise perform step S106；
Wherein, default thresholding can be obtained by system emulation, and the selection principle of the thresholding is to disclosure satisfy that agreement is advised
Fixed false-alarm and missing inspection requirement.
Step S105, handled by normal power control, go to step S108；
In this step, because SIR estimation result has exceeded thresholding, it is believed that the user terminal has upstream data hair in the TTI
Send, Power Control is carried out according to normal flow.Certainly, if now RNC has been issued newly by external circule power control
SIRtarget, now just using the value newly configured, that is to say, that the processing of several subframes is consistent with traditional approach below, is all
SIRtarget is configured and determines by RNC.
Step S106, the SIRtarget of the user terminal is reduced in several subframes behind in the TTI；
In this step, because SIR estimation result is not above thresholding, it is believed that user terminal is not believed in EDCH in the TTI
Data are sent on road, now just in several subframes behind the TTI, base station actively reduces the SIRtarget of the user terminal.
Wherein, SIRtarget reduction amplitude can be obtained by system emulation, can be fixed value or hundred
Divide ratio.The selection principle of the value be in the case where reducing the transmission power of user terminal as far as possible, ensure the terminal and base station it
Between Radio Link be in synchronous regime.
Explanation is needed exist for, DPCCH progress SIR estimations are obtained SIR estimation by each time slot due to base station
Value and SIRtarget be compared, so as to produce TPC (Transmit Power Control) order, the production of the TPC command
Raw rule is as defined in agreement, and the power for controlling user terminal is to rise or drop.So as long as SIRtarget is lower, use
The transmission power of family terminal is also lower.
Step S108, after next TTI starts, above step is repeated.
Preferably, after current transmission interval TTI terminates, because can not currently predict next transmission intercal terminal user
Whether have EDCH data transmission, in order to ensure terminal user open originating data after base station can correctly receive, when the TTI terminates
Afterwards, the SIRtarget values of the user terminal are recovered to normal value.Certainly, the opportunity for recovering SIRtarget values can also be according to reality
Border situation is shifted to an earlier date.
In specific embodiments, five above-mentioned steps can be carried out with appropriate adjustment according to actual conditions.
By the present embodiment, the transmission power of user terminal can be effectively reduced, reduces uplink interference, improves systematic function
And capacity.
Embodiment 2
HSUPA user in the present embodiment using transmission intercal TTI as 10MS is the power control that example illustrates the present invention
Method (equally may be referred to Fig. 1) processed, comprises the following steps：
Step S202, believe for the HSUPA user terminals that TTI is 10MS, base station in the EDPCCH for collecting the user terminal
After the data of first subframe (the 0-2 time slot) in road, SIR estimation is carried out to the data of the subframe.
Step S204, base station judges whether the SIR estimation result of the 1st subframe exceedes default thresholding (being assumed to be M), such as
Fruit exceedes, then performs step S205 and handled by normal power control；Otherwise step S206 adjustment SIRtarget is performed；
Step S205, handled by normal power control, go to step S208；
If SIR estimation result has exceeded thresholding M, then it is assumed that the user terminal has upstream data in the 10MS transmission intercals
Send, Power Control is carried out according to normal flow.Assuming that the SIRtarget that now RNC is issued is K, then after the 10MS
In the subframe (3-14 time slots) of 4, face, SIRtarget is K.Certainly, if now RNC has been issued newly by external circule power control
SIRtarget, now just using the value that newly configures, that is to say, that the processing of 4 subframes is consistent with traditional approach below, be all by
RNC configures and determined SIRtarget.
Step S206, the SIRtarget of the user terminal is reduced in 4 subframes behind Transmission Time Interval TTI；
If SIR estimation result is not above thresholding M, then it is assumed that user terminal does not exist in 15 time slots of the 10MS
Data are sent on EDCH channels, now just behind the 10MS in 4 subframes (3-14 time slots), base station actively reduces the user
SIRtarget.Assuming that the SIRtarget values of current RNC configurations are K, then the SIRtargett values after reducing are K-N.
Wherein, SIRtarget reduction amplitude N selection has two ways：
A) N takes fixed value, such as：N=2db.
B) N value is a dynamic value, and N value changes according to K value changes.Such as：N=0.3K.Quite
In declining certain ratio on the basis of original SIRtarget.
Step S207, after 10MS TTI terminate, the SIRtarget for recovering the user terminal is K.
This step is optional, and can select the opportunity recovered in advance according to actual conditions, such as：
If the 1st subframe judges that terminal does not have data transmission in the 10MS radio frames, to the 2-4 of the 10MS frames
Individual subframe (4-12 time slots) reduce SIRtarget operation, just recovers since the 13rd time slot of the 10MS frames
SIRtarget.It is exactly briefly：1st subframe is judged that the 2-4 subframe reduces SIRtarget, and the 5th subframe is opened
Begin to recover SIRtarget.
Step S208, after next 10MS TTI start, above step is repeated.
Commercialization net practical application in, user terminal be continued for carry out data upload probability and possibility all very
It is small, it is substantially and discontinuously carries out upstream data transmitting transmission.But in the case of non-CPC, even if the user terminal is not carried out
Transmitting uplink data, now DPCCH to be all transmitted always, and because the SIRtarget of HSUPA data services is big
In the SIRtarget of speech business, then within the time that user terminal does not have data to send, using traditional Power Control side
Method, now the transmission power of terminal remain within higher level, and after using method provided in an embodiment of the present invention, herein
In the case of kind, due to reducing the SIRtarget of user terminal, the transmission power of user terminal also reduces accordingly.From Fig. 2
It can be seen that：In the case that user terminal does not have data transmission in 10MS TTI, the traditional approach 10MS 15 time slots are all
Use identical SIRtarget (assuming that the value is K)；After the method for the embodiment of the present invention, 12 behind the 10MS
The SIRtarget of time slot is K-N, therefore the transmission power of user terminal is just wanted than traditional approach in 12 time slots below
It is low, therefore the transmission power of terminal is below traditional method within 80% time, so as to effectively reduce HSUPA user's end
The transmission power at end, uplink interference is reduced, improve systematic function and capacity.
Embodiment 3
Be as shown in Figure 3 the embodiment of the present invention 3 provide a kind of uplink power control device function structure chart, the device
Including receiving module 302, estimation module 304, judge module 306 and adjusting module 306, wherein：
Receiving module 302 is used to receive radio frames；
After the 1st subframe of the estimation block 304 for receiving radio frames, carry out signal to noise ratio SIR using the 1st subframe and estimate
Meter；
Judge module 306 is used to judge whether the SIR estimation result of the 1st subframe exceedes default thresholding；
Adjusting module 308 is used for when the SIR estimation result of the 1st subframe is not above default thresholding, in the TTI
The SIRtarget of the user terminal is reduced in subframe below.
Specifically, adjusting module 308 is specifically used for reducing the SIRtarget by fixed value or in proportion.
Preferably, after current transmission interval TTI terminates, because can not currently predict next transmission intercal terminal user
Whether have EDCH data transmission, in order to ensure terminal user open originating data after base station can correctly receive, adjusting module 308 also
For recovering the SIRtarget of the user terminal after the TTI terminates to normal value.Certainly, the opportunity of SIRtarget values is recovered
It can also be shifted to an earlier date according to actual conditions.
In addition, present invention also offers the base station in a kind of WCDMA system, the base station fills including above-mentioned uplink power control
Put, present invention also offers a kind of WCDMA system, the system includes user terminal and filled including above-mentioned uplink power control
The base station put, concrete technical scheme are not repeated herein referring to above-described embodiment 1-3.
A preferred embodiment of the present invention has shown and described in described above, but as previously described, it should be understood that the present invention
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations,
Modification and environment, and above-mentioned teaching or the technology or knowledge of association area can be passed through in the scope of the invention is set forth herein
It is modified., then all should be in this hair and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention
In the protection domain of bright appended claims.
Claims (10)
1. a kind of ascending power control method, it is characterised in that the described method comprises the following steps:
After base station receives the 1st subframe of radio frames, signal to noise ratio SIR estimation is carried out using the 1st subframe；If the 1st son
The SIR estimation result of frame is not above default thresholding, then in Transmission Time Interval TTI behind subframe in reduce user whole
The target signal to noise ratio SIRtarget at end.
2. according to the method for claim 1, it is characterised in that the target signal to noise ratio for reducing the user terminal
SIRtarget is specially：The SIRtarget is reduced by fixed value or in proportion.
3. according to the method for claim 1, it is characterised in that also include after methods described：It is extensive after the TTI terminates
The target signal to noise ratio of the multiple user terminal is to normal value.
4. according to the method for claim 1, it is characterised in that the default thresholding and the SIRtarget reduction
Amplitude is obtained by emulation.
5. according to the method described in any one in claim 1-4, it is characterised in that the user terminal is HSUPA terminals,
The TTI is 10ms.
6. a kind of uplink power control device, it is characterised in that described device includes receiving module, estimation block, judge module
And adjusting module, wherein：
The receiving module is used to receive radio frames；
After the 1st subframe of the estimation block for receiving radio frames, the 1st subframe is utilized to carry out signal to noise ratio SIR estimation；
The judge module is used to judge whether the SIR estimation result of the 1st subframe exceedes default thresholding；
The adjusting module be used for when the SIR estimation result of the 1st subframe is not above default thresholding, in TTI behind
Subframe in reduce user terminal SIRtarget.
7. device according to claim 6, it is characterised in that the adjusting module be specifically used for by fixed value or by than
Example reduces the SIRtarget.
8. device according to claim 6, it is characterised in that the adjusting module is additionally operable to, and the TTI recovers after terminating
The SIRtarget of the user terminal is to normal value.
9. a kind of base station, it is characterised in that the base station includes the device as described in claim 6-8 any one.
10. a kind of WCDMA system, including user terminal and base station, it is characterised in that the base station is the base described in claim 9
Stand.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110363921.0A CN103118422B (en) | 2011-11-16 | 2011-11-16 | A kind of ascending power control method, device, base station and system |
| PCT/CN2011/083839 WO2013071665A1 (en) | 2011-11-16 | 2011-12-12 | Uplink power control method, device, base station, and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110363921.0A CN103118422B (en) | 2011-11-16 | 2011-11-16 | A kind of ascending power control method, device, base station and system |
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| Publication Number | Publication Date |
|---|---|
| CN103118422A CN103118422A (en) | 2013-05-22 |
| CN103118422B true CN103118422B (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110363921.0A Expired - Fee Related CN103118422B (en) | 2011-11-16 | 2011-11-16 | A kind of ascending power control method, device, base station and system |
Country Status (2)
| Country | Link |
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| CN (1) | CN103118422B (en) |
| WO (1) | WO2013071665A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509242A (en) * | 2016-06-14 | 2017-12-22 | 中兴通讯股份有限公司 | A kind of uplink power control method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359566A (en) * | 1999-06-30 | 2002-07-17 | 高通股份有限公司 | SIR threshold in a closed loop power control system |
| CN1514560A (en) * | 2002-12-31 | 2004-07-21 | 深圳市中兴通讯股份有限公司上海第二 | Power control method of broad band CDMA mobile communication system |
| CN1761170A (en) * | 2005-09-13 | 2006-04-19 | 浙江华立通信集团有限公司 | Algorithm for estimating signal to interference ratio in down going physical channel of CDMA system in TDD mode |
| CN1968035A (en) * | 2006-04-19 | 2007-05-23 | 华为技术有限公司 | Regulation method of SIR special used for physical control channel DPCCH |
| CN101874362A (en) * | 2007-11-26 | 2010-10-27 | 爱立信电话股份有限公司 | DPCCH and HS-DPCCH control at low grants for E-DCH |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4571948B2 (en) * | 2003-11-17 | 2010-10-27 | インターデイジタル テクノロジー コーポレーション | Method, access point, and WTRU for controlling transmission power level of uplink / downlink communication in a wireless communication system |
| CN1797983A (en) * | 2004-12-29 | 2006-07-05 | 北京三星通信技术研究有限公司 | Indication transmission method for data transmission format in time division duplexing communication system in low code rate |
-
2011
- 2011-11-16 CN CN201110363921.0A patent/CN103118422B/en not_active Expired - Fee Related
- 2011-12-12 WO PCT/CN2011/083839 patent/WO2013071665A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1359566A (en) * | 1999-06-30 | 2002-07-17 | 高通股份有限公司 | SIR threshold in a closed loop power control system |
| CN1514560A (en) * | 2002-12-31 | 2004-07-21 | 深圳市中兴通讯股份有限公司上海第二 | Power control method of broad band CDMA mobile communication system |
| CN1761170A (en) * | 2005-09-13 | 2006-04-19 | 浙江华立通信集团有限公司 | Algorithm for estimating signal to interference ratio in down going physical channel of CDMA system in TDD mode |
| CN1968035A (en) * | 2006-04-19 | 2007-05-23 | 华为技术有限公司 | Regulation method of SIR special used for physical control channel DPCCH |
| CN101874362A (en) * | 2007-11-26 | 2010-10-27 | 爱立信电话股份有限公司 | DPCCH and HS-DPCCH control at low grants for E-DCH |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103118422A (en) | 2013-05-22 |
| WO2013071665A1 (en) | 2013-05-23 |
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