CN101577960B - Method and device for adjusting power - Google Patents
Method and device for adjusting power Download PDFInfo
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- CN101577960B CN101577960B CN2008101059488A CN200810105948A CN101577960B CN 101577960 B CN101577960 B CN 101577960B CN 2008101059488 A CN2008101059488 A CN 2008101059488A CN 200810105948 A CN200810105948 A CN 200810105948A CN 101577960 B CN101577960 B CN 101577960B
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Abstract
The invention discloses a method for adjusting power, which is used for realizing symbol-level power distribution and reducing same frequency interference among users. The method comprises the following steps: obtaining a channel quality measuring value of each user in paired users; determining a difference of a maximum channel quality measuring value and a minimum channel quality measuring value;and when the difference is larger than a predetermined threshold value, adjusting the power of a user with the maximum channel quality to be lower, and/or adjusting the power of a user with the minim um channel quality measuring value to be higher. The invention also discloses a device for realizing the method.
Description
Technical field
The present invention relates to the communications field, particularly relate to method and the device of adjusting power.
Background technology
Power is one of focus of wireless communication field concern always.Since adopt time-division, frequency division or sign indicating number branch technology, independently of one another between each user, so, can adopt individual power control for different users.
The multi-user with time slot multiplexing (Multi-User Reusing One Slot, MUROS) technology has proposed the resource of the same time slot of the multiplexing same frequency of a plurality of users, the information multiplexing that is about to a plurality of users is launched transmission on same channel.Adopt orthogonal sub-channels (Orthogonal Sub Channel, OSC) technology, on down link, by quarternary phase-shift keying (QPSK) (Quadrature Phase Shift Keying, QPSK) modulation, on same channel, promptly the multi-user's co-frequency co-time slot by bit-level is multiplexing, reaches the purpose that improves voice capacity with two users' information multiplexing.The receiver of terminal and base station passes through the method demodulation target information of interference eliminated respectively.User's multiplex technique is not limited thereto.Owing to the multiplexing identical running time-frequency resource of a plurality of users, there is the problem of phase mutual interference between then a plurality of users.Be head it off, proposed the associating power control, consider that promptly a plurality of users' situation is carried out the power adjustment to these a plurality of users then.Its basic skills is, obtains the channel quality of each user among the pairing user, be the poorest user's allocating power of channel quality then, and according to the power of this configuration other user's allocating power for matching among the user, the user that promptly matches adopts identical power.Prior art is the joint Power control of bit-level, and the symbol with a plurality of users is multiplexed with a symbol earlier, then this symbol is carried out power control.
But along with the variation of channel circumstance, the demand of different user power adjustment is different, and the method for associating power control reckons without this difference, but mandatory advolution can't be carried out power adjustment targetedly to a plurality of users, lacks flexibility.And with the poorest user of channel quality is reference, has not only wasted channel quality user's energy preferably, and has increased co-channel interference.
Summary of the invention
The embodiment of the invention provides a kind of method and device of adjusting power, is used to realize symbol-level power distribution, reduces the co-channel interference between the user.
A kind of method of adjusting power may further comprise the steps:
Obtain the channel quality measurements of each user among the pairing user;
Determine the difference of high channel quality measured values and lowest channel quality measured value;
When described difference during, turn down the user's of high channel quality measured values power, and/or heighten the user's of lowest channel quality measured value power greater than preset threshold value.
A kind of device that is used to adjust power comprises:
Analysis module is used for obtaining the channel quality measurements of matching each user of user;
Computing module is used for determining the difference of high channel quality measured values and lowest channel quality measured value;
Adjusting module is used for turning down the user's of high channel quality measured values power, and/or heightening the user's of lowest channel quality measured value power when described difference during greater than preset threshold value.
The embodiment of the invention is in the Base-Band Processing process pairing user to be carried out power division targetedly, has satisfied all pairing users' transmission requirement substantially.
Description of drawings
Fig. 1 is a main method flow chart of adjusting power in the embodiment of the invention;
Fig. 2 is a detailed method flow chart of adjusting power in the embodiment of the invention during two users;
Fig. 3 is a detailed method flow chart of adjusting power in the embodiment of the invention during n user;
Fig. 4 is a detailed method flow chart of adjusting power in the embodiment of the invention during first kind of comprehensive multiple channel quality factor;
Fig. 5 is a detailed method flow chart of adjusting power in the embodiment of the invention during second kind of comprehensive multiple channel quality factor;
The primary structure figure of Fig. 6 for installing in the embodiment of the invention;
The detailed structure view of Fig. 7 for installing in the embodiment of the invention.
Embodiment
The embodiment of the invention is carried out symbol-level power distribution to the pairing user, has taken all factors into consideration pairing user's demand, adjusts user's power targetedly, has satisfied the requirement of pairing user's transmission quality, and has not increased overhead substantially.Wherein, symbol level is multiplexing to be meant: the Bit data to each user is independently modulated, and finishes that to carry out the user after the modulation multiplexing, promptly at the corresponding symbol of multiplexing previous user.So the embodiment of the invention is before the user is multiplexing, a plurality of users are carried out power division, have more specific aim, distribute more flexible.
Referring to Fig. 1, the main method flow process of adjusting power in the present embodiment is as follows:
Step 101: the channel quality measurements that obtains each user among the pairing user.Wherein, channel quality measurements is the imbody of channel quality on amount.
Step 102: the difference of determining high channel quality measured values and lowest channel quality measured value.
Step 103:, turn down the user's of high channel quality measured values power, and/or heighten the user's of lowest channel quality measured value power when described difference during greater than preset threshold value.If only turn down the user's of high channel quality measured values power, then can reduce pairing user's gross power, improve throughput of system; If only heighten the user's of lowest channel quality measured value power, can improve this user's channel transmission quality; If turn down simultaneously high channel quality measured values the user power and heighten the user's of lowest channel quality measured value power, then can not increase pairing user's gross power or increase under the less situation in pairing user gross power, improve the user's of lowest channel quality measured value channel transmission quality, also may under the situation of the user's who does not influence high channel quality measured values transmission quality, improve throughput of system.So, when described difference during greater than preset threshold value, turning down user's the power of high channel quality measured values and these two operations of power of heightening the user of lowest channel quality measured value and can select one at least, is that example describes with the user's that turns down high channel quality measured values simultaneously power and the power of heightening the user of lowest channel quality measured value below.
Be example with two users as the pairing user below, describe the process that power is adjusted in detail, referring to shown in Figure 2, idiographic flow is as follows:
Step 201: obtain the upward signal that pairing user (user 1 and user 2) sends.
Step 202: baseband signal is modulated.
Step 203: the channel quality of determining user 1 and user 2 according to described upward signal.
Step 204: user 1 and user's 2 channel quality is compared, determine high channel quality measured values and lowest channel quality measured value.
Step 205: the difference of determining high channel quality measured values and lowest channel quality measured value.
Owing to have only two users, directly poor to user 1 and user's 2 channel quality so step 204 and step 205 can be combined into a step, the positive and negative size of determining two channel qualities according to difference takes absolute value to difference then.
Step 206: whether judge this difference greater than preset threshold value, if then continue step 207, otherwise continue step 208.
Step 207: on the basis of the gross power that does not increase described pairing user, turn down high channel quality measured values and heighten the user's of lowest channel quality measured value correspondence power according to default step-length.
Step 208: user 1 and user 2 are carried out individual power control, promptly carry out power control respectively according to user 1 and user 2 channel quality separately.
Step 209: it is multiplexing that user 1 and user 2 are carried out the user.
Wherein, step 203-206 is processes independent of each other with respect to step 202, does not have strict execution successively.
Can sum up n power regulating method that matches the user from two pairing users' power regulating method, referring to shown in Figure 3, its specific implementation process is as follows:
Step 301: obtain the upward signal that pairing user (user 1-user n) sends.
Step 302: baseband signal is modulated.
Step 303: determine user 1-user n corresponding channel quality Q1-Qn respectively according to described upward signal.
Step 304: the channel quality Q1-Qn of user 1-user n is compared, determine high channel quality measured values and lowest channel quality measured value.
Step 305: the difference of determining high channel quality measured values and lowest channel quality measured value.
Step 306: whether judge this difference greater than preset threshold value, if then continue step 307, otherwise continue step 308.
Step 307: on the basis of the gross power that does not increase described pairing user, turn down high channel quality measured values and heighten the user's of lowest channel quality measured value correspondence power according to default step-length.Other user's power wouldn't be adjusted.
Step 308: user 1-user n is carried out individual power control.
Step 309: it is multiplexing that user 1-user n is carried out the user.
Channel quality embodies by signal to noise ratio and/or signal power, and channel quality also can be embodied by other factors certainly.Wherein, the big more channel quality that shows of signal to noise ratio is good more; The signal power of the signal that receives is high more, shows that channel quality is good more.Channel quality is relevant with multiple factor, makes the process of power adjustment slightly seem complicated, below this is described in detail.Specific implementation is not unique, is example with two kinds of implementations.
Referring to Fig. 4, in the present embodiment about the difference of signal to noise ratio and signal power all with threshold ratio than the time the method realization flow as follows:
Step 401: obtain the upward signal that pairing user (user 1 and user 2) sends.
Step 402: baseband signal is modulated.
Step 403: signal to noise ratio and the signal power of determining user 1 and user 2 according to described upward signal.
Step 404: user 1 and user's 2 signal to noise ratio is compared, user 1 and user's 2 signal power is compared, determine highest signal to noise ratio and lowest signal-to-noise, highest signal power and lowest signal power.
Step 405: the difference of determining difference, highest signal power and the lowest signal power of highest signal to noise ratio and lowest signal-to-noise.
Step 406: whether the difference of judging highest signal to noise ratio and lowest signal-to-noise is greater than presetting first threshold, whether the difference of judging highest signal power and difference signal power is greater than the second default threshold value, if satisfy a condition at least, then continue step 407, otherwise continue step 408.
Usually its signal power of user that signal to noise ratio is high is also higher, but do not get rid of the signal to noise ratio of user 1 signal to noise ratio greater than user 2, and user 2 signal power is greater than the situation of user 1 signal power, present embodiment is that signal to noise ratio and signal power are distributed priority, for example the priority of signal to noise ratio is higher than signal power, when user 1 the signal to noise ratio signal to noise ratio greater than user 2, and user 2 signal power determines that user 1 channel quality is better than user 2 channel quality during greater than user 1 signal power.When channel quality is relevant with at least three kinds of factors, also can adopt the method for priority; Perhaps, adopt the mode that the minority is subordinate to the majority, promptly user 1 aspect two kinds of factors greater than user 2, user 2 only aspect a kind of factor greater than user 1, determine that user 1 channel quality is better than user 2 this moment; Perhaps, also can with priority approach and the method that the minority is subordinate to the majority in conjunction with etc.
Step 407: on the basis of the gross power that does not increase described pairing user, turn down high channel quality measured values and heighten the user's of lowest channel quality measured value correspondence power according to default step-length.
Step 408: user 1 and user 2 are carried out individual power control.
Step 409: it is multiplexing that user 1 and user 2 are carried out the user.
Referring to Fig. 5, the method realization flow in the present embodiment when comprehensive signal to noise ratio and signal power is as follows:
Step 501: obtain the upward signal that pairing user (user 1 and user 2) sends.
Step 502: baseband signal is modulated.
Step 503: signal to noise ratio and the signal power of determining user 1 and user 2 according to described upward signal.
Step 504:, respectively user 1 and user 2 are calculated according to formula " signal to noise ratio * weight factor 1+ signal power * weight factor 2 ".
Step 505: the difference of determining user 1 result of calculation value and user's 2 result of calculation value.
Step 506: whether judge this difference greater than preset threshold value, if then continue step 507, otherwise continue step 508.
Step 507: on the basis of the gross power that does not increase described pairing user, turn down high channel quality measured values and heighten the user's of lowest channel quality measured value correspondence power according to default step-length.Wherein, the channel quality that end value is high more is good more.
Step 508: user 1 and user 2 are carried out individual power control.
Step 509: it is multiplexing that user 1 and user 2 are carried out the user.
By above description, the method for adjusting power there has been clearly understanding, present embodiment also is provided for realizing the device of said method, referring to shown in Figure 6, it comprises analysis module 601, computing module 602, judge module 603 and adjusting module 604.This device can specifically be base station or evolution base station etc.
Adjusting module 604 is used for turning down the user's of high channel quality measured values power when described difference during greater than preset threshold value, and the power of heightening the user of lowest channel quality measured value.
This device also comprises interface module 605, control module 606, modulation module 607 and Multiplexing module 608, referring to shown in Figure 7.
It is multiplexing that Multiplexing module 608 is used for the user.
Be used to realize that the software of the embodiment of the invention can be stored in storage mediums such as floppy disk, hard disk, CD and flash memory.
The embodiment of the invention is in the Base-Band Processing process pairing user to be carried out power division targetedly, has satisfied all pairing users' transmission requirement substantially.And take all factors into consideration the multiple factor of channel quality, determine each user's channel quality comparatively accurately and carry out power division, more targeted, more flexible.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. a method of adjusting power is characterized in that, may further comprise the steps:
Obtain the channel quality measurements of each user among the pairing user;
Determine the difference of high channel quality measured values and lowest channel quality measured value;
When described difference during, turn down the power of high channel quality measured values institute respective user, and/or heighten the power of lowest channel quality measured value institute respective user greater than preset threshold value.
2. the method for claim 1 is characterized in that, also comprises step: when described difference is not more than preset threshold value, described each user is carried out individual power control.
3. the method for claim 1 is characterized in that, is condition with the gross power that does not increase described pairing user, turns down the power of high channel quality measured values institute respective user and/or heightens the power of lowest channel quality measured value institute respective user.
4. as claim 1,2 or 3 described methods, it is characterized in that described channel quality measurements comprises signal-to-noise ratio measurements and/or signal power measurement value;
When described channel quality measurements comprises signal-to-noise ratio measurements and signal power measurement value, determine that the high channel quality measured values and the step of the difference of lowest channel quality measured value comprise: definite respectively difference about signal-to-noise ratio measurements and signal power measurement value;
When described difference during, turn down the user's of high channel quality measured values power, and/or the step of power of heightening the user of lowest channel quality measured value comprises greater than preset threshold value:
To compare with the respective threshold of presetting about the difference of signal-to-noise ratio measurements and signal power measurement value respectively, when having a difference at least greater than preset threshold value, turn down the user's of high channel quality measured values power, and/or heighten the user's of lowest channel quality measured value power.
5. as claim 1,2 or 3 described methods, it is characterized in that described channel quality measurements comprises signal-to-noise ratio measurements and/or signal power measurement value;
When described channel quality measurements comprises signal-to-noise ratio measurements and signal power measurement value, determine that the step of the difference of high channel quality measured values and lowest channel quality measured value comprises:
Each user's signal-to-noise ratio measurements and signal power measurement value are carried out weights calculate, obtain each user's result of calculation, and determine the difference of maximum and minimum value in each user's the result of calculation.
6. a device that is used to adjust power is characterized in that, comprising:
Analysis module is used for obtaining the channel quality measurements of matching each user of user;
Computing module is used for determining the difference of high channel quality measured values and lowest channel quality measured value;
Adjusting module is used for turning down the user's of high channel quality measured values power, and/or heightening the user's of lowest channel quality measured value power when described difference during greater than preset threshold value.
7. device as claimed in claim 6 is characterized in that, also comprises:
Control module is used for when described difference is not more than preset threshold value, and described each user is carried out individual power control.
8. device as claimed in claim 6 is characterized in that, described adjusting module is that condition is adjusted power with the gross power that does not increase described pairing user.
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| CN2008101059488A CN101577960B (en) | 2008-05-06 | 2008-05-06 | Method and device for adjusting power |
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| CN2008101059488A CN101577960B (en) | 2008-05-06 | 2008-05-06 | Method and device for adjusting power |
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| CN101577960A CN101577960A (en) | 2009-11-11 |
| CN101577960B true CN101577960B (en) | 2011-06-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102142907B (en) * | 2010-01-28 | 2013-08-14 | 大唐移动通信设备有限公司 | Method and device for detecting radio frequency channels |
| CN102457889B (en) * | 2010-10-28 | 2016-03-30 | 中兴通讯股份有限公司 | A kind of method and device reducing the common equipment interference of LTE and ISM |
| CN104969629B (en) * | 2013-09-27 | 2019-09-13 | 华为技术有限公司 | A kind of method and apparatus that adjustment sends power |
| CN107113738B (en) * | 2015-03-31 | 2020-07-07 | 华为技术有限公司 | Method and equipment for adjusting transmitting power |
| CN106507461B (en) * | 2015-09-08 | 2020-03-31 | 中兴通讯股份有限公司 | Power adjustment method and device in uplink multi-user system |
| CN105228235B (en) * | 2015-09-09 | 2019-05-24 | 上海华为技术有限公司 | Signal processing method and base station |
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| CN1473400A (en) * | 2000-11-09 | 2004-02-04 | 高通股份有限公司 | Method and apparatus for controlling signal power level in communication system |
| CN1608354A (en) * | 2001-10-25 | 2005-04-20 | 高通股份有限公司 | Controlling forward link transmission power |
| CN1853391A (en) * | 2003-09-17 | 2006-10-25 | 英特尔公司 | Modulation scheme for orthogonal frequency division multiplexing systems or the like |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1473400A (en) * | 2000-11-09 | 2004-02-04 | 高通股份有限公司 | Method and apparatus for controlling signal power level in communication system |
| CN1608354A (en) * | 2001-10-25 | 2005-04-20 | 高通股份有限公司 | Controlling forward link transmission power |
| CN1853391A (en) * | 2003-09-17 | 2006-10-25 | 英特尔公司 | Modulation scheme for orthogonal frequency division multiplexing systems or the like |
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