CN1983850B - Method for controlling power of combined service in mobile telecommunication system - Google Patents
Method for controlling power of combined service in mobile telecommunication system Download PDFInfo
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- CN1983850B CN1983850B CN200610082781A CN200610082781A CN1983850B CN 1983850 B CN1983850 B CN 1983850B CN 200610082781 A CN200610082781 A CN 200610082781A CN 200610082781 A CN200610082781 A CN 200610082781A CN 1983850 B CN1983850 B CN 1983850B
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Abstract
The invention is concerned with the power controlling method for the combination operation in the mobile communication system, including: confirms the signal-to-interference-ratio (SIR) target value of the current each transmission channel; selects the maximum value from the target value as the current power controlling target value; gets power controlling bit and processes the emission power control according to the target value. The invention is: each maximum of the is the current signal-to-interference-ratio (SIR) target value, in order that the transmission channel signal-to-interference-ratio (SIR) target value with the worst transmission quality convergences to process the power controlling signal-to-interference-ratio (SIR) target value, ensures the transmission quality of the transmission channel and also other transmission channel, saves the emission power.
Description
Technical field
The present invention relates to a kind of Poewr control method of mobile communication system, relate in particular to the Poewr control method of composite service in a kind of mobile communication system.
Background technology
The power control of mobile communication system can be divided into uplink power control that terminal transmit power is controlled and the descending power control that base station transmitting power is controlled.Simultaneously, whether participate in power control simultaneously by terminal and base station and can be divided into the control of open Loop Power control and closed power again.
In the uplink power control of closed power control, the decode results to the terminal received signal that radio network controller sends according to the base station calculates Block Error Rate, and calculate a signal interference ratio desired value according to block error probability desired value, the base station is according to the signal interference ratio desired value of radio network controller and the signal-to-interference ratio measurement value comparison of the terminal signaling that receives, thereby draw the power control bit of regulating terminal transmit power, terminal is regulated transmitting power according to this power control bit.
In the descending power control of closed power control, terminal is calculated descending reception Block Error Rate and signal-to-interference ratio measurement value, and calculate a signal interference ratio desired value according to block error probability desired value, terminal is signal interference ratio desired value and signal-to-interference ratio measurement value relatively, thereby draw power control bit, transmitting power is regulated according to this power control bit in the base station.
Closed power control can be divided into inner loop power control and exterior ring power control again.In to the control of the exterior ring power of single business, the Block Error Rate measured value is higher than the block error probability desired value signal interference ratio desired value that then raises, and the Block Error Rate measured value is lower than block error probability desired value and then reduces the signal interference ratio desired value.By being set, signal interference ratio desired value adjustment amount is directly proportional with the difference of Block Error Rate measured value and block error probability desired value, and can be so that actual Block Error Rate reaches target value set.
For the composite service of multiple services user terminal requests, there are two kinds of solutions in the control to exterior ring power in the prior art.
Wherein a kind of scheme is select the transmission channel of a main business to carry out exterior ring power control earlier, and the communication quality through-rate of other transmission channel coupling to satisfy.Promptly set the rate matching attribute of each transmission channel, this rate matching attribute has determined the power division ratio of each bit between transmission channel, when making the quality of reception of a transmission channel meet the demands, the quality of reception of other transmission channel is also approximate to meet the demands.Adopt said method, the Block Error Rate of the transmission channel of main business is because the effect of exterior ring power control converges to desired value, and the channel quality of reception of other transmission channel is controlled by the quality of reception of main business.But under a given quality of reception, the Block Error Rate of transmission channel is not completely specified, can be subjected to the restriction of various factorss such as channel model, and this also needs to introduce the reason place of closed loop exterior ring power control just.Therefore, adopt said method, the Block Error Rate of the transmission channel of non-main business shows certain randomness, may be higher than desired value and also may be lower than desired value, and the error rate of its requirement can not be guaranteed.
Another kind of scheme is, the signal interference ratio desired value of the exterior ring power of current time control is the maximum sum of signal interference ratio desired value adjustment amount in the signal interference ratio desired value of previous moment and all transmission channels, this signal interference ratio desired value adjustment amount is a negative value reducing under the signal interference ratio desired value situation, under rising signal interference ratio desired value situation be on the occasion of, signal interference ratio desired value adjustment amount is directly proportional with the difference of Block Error Rate measured value and block error probability desired value.
In this kind control method, only when all transmission channels all required to reduce the signal interference ratio desired value, current signal interference ratio desired value just can reduce, as long as and any transmission channel requirement rising signal interference ratio desired value is arranged, current signal interference ratio desired value will raise.
Adopt this kind method to regulate the signal interference ratio desired value, consequently, when having any transmission channel requirement to improve the signal interference ratio desired value in all transmission channels, the signal interference ratio desired value will improve, like this, do not require to improve the transmission channel of signal interference ratio desired value for other, all can occur requiring to reduce the signal interference ratio desired value and the phenomenon that improved of signal interference ratio desired value in fact, thereby the actual value that can cause the Block Error Rate of above-mentioned other each transmission channels is lower than the block error probability desired value of setting, has wasted transmitting power.In addition, calculate the pairing transmission channel of maximum of the employed signal interference ratio adjustment amount of current signal interference ratio desired value might not be corresponding the signal interference ratio desired value of previous moment, therefore, can not guarantee that the current signal interference ratio desired value that calculates can satisfy the transmission channel that certain is determined.More serious consequence is, the transmission quality of certain bar transmission channel is the poorest, thereby signal interference ratio adjustment amount maximum, and be higher than the signal interference ratio desired value of this transmission channel in last one constantly the signal interference ratio desired value of exterior ring power control, this signal interference ratio desired value that just causes current time to carry out exterior ring power control is higher than the signal interference ratio desired value of all transmission channel actual needs, also causes the waste of transmitting power.
Summary of the invention
The present invention is directed to the shortcoming of prior art, the Poewr control method of composite service in a kind of mobile communication system is provided, can reasonably control transmitting power, thereby save transmitting power.
The Poewr control method of composite service in the mobile communication system of the present invention, its step comprises:
Step 1, determine the signal interference ratio desired value that each transmission channel is current, wherein, if not first power control, described each transmission channel equals the signal interference ratio desired value of each comfortable previous moment and the adjustment amount sum of signal interference ratio desired value in the signal interference ratio desired value of current time;
Step 2 is selected maximum from the signal interference ratio desired value of above-mentioned each transmission channel, with the signal interference ratio desired value of this maximum as current power control;
Step 3, the signal interference ratio desired value of controlling according to above-mentioned current power draws power control bit, carries out transmitting power control.
In the above-mentioned steps one, during inferior originally control, the initial value of the signal interference ratio desired value of each transmission channel sets in advance.
Above-mentioned steps two can further include, the difference that the signal interference ratio desired value and the signal interference ratio desired value of current power control are adjusted base value is compared with the signal interference ratio desired value of current any one transmission channel, get that maximum is the signal interference ratio desired value of corresponding transmission channel after upgrading among the two.
In the above-mentioned steps three, when uplink power control, terminal is regulated transmitting power according to the power control bit that the base station issues.
In the above-mentioned steps three, when descending power was controlled, the power control bit that send according to terminal the base station was regulated transmitting power.
Compared with prior art, maximum with the signal interference ratio desired value of each transmission channel among the present invention is current signal interference ratio desired value, make the signal interference ratio desired value of the transmission channel that current transmission quality is the poorest converge to current signal interference ratio desired value of carrying out power control, guaranteed the transmission quality of this transmission channel, and the transmission quality of other transmission channels also is guaranteed, and has saved transmitting power.Simultaneously, by the signal interference ratio desired value is upgraded, also guaranteed can not occur Block Error Rate higher transmission channel continuously, thereby guaranteed transmission quality.
Description of drawings
Fig. 1 is the method flow diagram of the power control of composite service in the mobile communication system of the present invention.
Embodiment
In the mobile communication system of the present invention in the Poewr control method of composite service, maximum with the signal interference ratio desired value of each transmission channel is current signal interference ratio desired value, make the signal interference ratio desired value of the transmission channel that current transmission quality is the poorest converge to current signal interference ratio desired value of carrying out power control, guarantee the transmission quality of each bar transmission channel, and saved transmitting power.
Be described further below in conjunction with the Poewr control method of accompanying drawing composite service in the mobile communication system of the present invention.
As shown in Figure 1, the Poewr control method of composite service comprises the steps: in the mobile communication system of the present invention
In this step, each transmission channel equals the signal interference ratio desired value of each comfortable previous moment and the adjustment amount sum of signal interference ratio desired value in the signal interference ratio desired value of current time.Described signal interference ratio desired value is adjusted base value and is provided with according to the Block Error Rate distributed needs, the adjustment amount of this signal interference ratio desired value can on the occasion of, also can be negative value, and be directly proportional with the difference of Block Error Rate measured value and block error probability desired value.When the signal interference ratio desired value of any one transmission channel of current time is higher than the signal interference ratio desired value of this transmission channel of previous moment, the adjustment amount of signal interference ratio desired value be on the occasion of; When the signal interference ratio desired value of any one transmission channel of current time was lower than the signal interference ratio desired value of this transmission channel of previous moment, the adjustment amount of signal interference ratio desired value was a negative value.The signal interference ratio desired value of any one transmission channel of current time can be used following formulate:
SIRtrch(n，i)＝SIRtrch(n-1，i)+ΔSIRtrch(n，i)。
Wherein, SIRtrch (n, i) the signal interference ratio desired value of any one transmission channel of expression current time, SIRtrch (n-1, i) the signal interference ratio desired value of this corresponding transmission channel of previous moment of expression current time, (n, i) the signal interference ratio desired value of this corresponding transmission channel of previous moment of expression current time is with respect to the adjustment amount of current signal interference ratio desired value for Δ SIRtrch.Above-mentioned formulate the situation during non-first control transmitting power, when controlling transmitting power for the first time, the initial value of signal interference ratio desired value can set in advance, for example, the signal interference ratio desired value of corresponding transmission channel is set to than this transmission channel slightly high value of signal interference ratio desired value under normal circumstances.
In this step, the signal interference ratio desired value of more above-mentioned each transmission channel, the signal interference ratio desired value of choosing maximum wherein are current desired value of carrying out the signal interference ratio of power control.
Determine the required signal interference ratio desired value of current power control according to the signal interference ratio desired value of each transmission channel after, following situation may appear, promptly the Block Error Rate of a transmission channel (being assumed to transmission channel A) converges to desired value, and other certain transmission channel (being assumed to transmission channel B) possibility Block Error Rate is very low, the signal interference ratio desired value of this transmission channel B correspondence is also very low so, can be far below the signal interference ratio desired value in the current power control.Like this, when the environment of transmission channel changes, may cause transmission channel B more mistake piece to occur.Because the signal interference ratio desired value during the current signal interference ratio desired value of transmission channel B is controlled far below current power, therefore, has only this transmission channel through repeatedly raising desired value, just may influence the signal interference ratio desired value in the current power control, so, in such cases, the higher situation of piece by mistake still can appear continuously in transmission channel B.For addressing this problem, need after calculating the current signal interference ratio desired value of each transmission channel, upgrade signal interference ratio desired value separately, as separately signal interference ratio desired value, the signal interference ratio desired value of each transmission channel after next upgrades with this constantly comes rated output to control required signal interference ratio desired value with the signal interference ratio desired value after upgrading.
The signal interference ratio desired value of current each transmission channel is carried out method for updating is: the difference that the signal interference ratio desired value and the signal interference ratio desired value of current power control are adjusted base value is compared with the signal interference ratio desired value of current any one transmission channel, maximum is for upgrading the signal interference ratio desired value of back corresponding transmission channel among getting the two. and described signal interference ratio desired value is adjusted base value and is provided with according to the demand that Block Error Rate distributes, and this value has determined to occur the number of mistake piece continuously.
Signal interference ratio desired value for any one transmission channel after the above-mentioned renewal can be expressed as with formula:
SIR`trch(n，i)＝max(SIRtrch(n，i)，SIRcctrch(n)-SIRthreshold)。
In the formula, SIR`trch (n, i) for upgrading the signal interference ratio desired value of any one transmission channel of back, SIRtrch (n, i) be the signal interference ratio desired value of current any one transmission channel, SIRcctrch (n) is the signal interference ratio desired value of current power control, and SIRthreshold adjusts base value for the signal interference ratio desired value.
For uplink power control, compare according to above-mentioned definite current signal interference ratio desired value and current signal-to-interference ratio measurement value the base station, draw power control bit, and this power control bit is issued to terminal, terminal is regulated transmitting power according to the power control bit that receives.
For descending power control, terminal compares according to above-mentioned definite signal interference ratio desired value and current signal-to-interference ratio measurement value, draws power control bit, and this power control bit is sent to the base station, and transmitting power is regulated according to receiving power control bit in the base station.
In summary it can be seen, in Poewr control method of the present invention, can determine the signal interference ratio desired value in the current power control, and this signal interference ratio desired value is that inner loop power control is needed.In inner loop power control, be worth power control bit by comparing signal interference ratio desired value and signal-to-interference ratio measurement, final power emission end is regulated transmitting power according to this power control bit.
Use the present invention, overcome in the existing Poewr control method, simple signal interference ratio desired value and each transmission channel signal interference ratio desired value adjustment amount maximum sum with previous moment are the signal interference ratio desired value of current time, thereby the signal interference ratio desired value that the causes current time needed signal interference ratio desired value that is not any one transmission channel, and cause the drawback of transmitting power waste.
In the present invention, the maximum of getting each transmission channel signal interference ratio desired value is the signal interference ratio desired value that current time carries out power control, satisfied the transmission quality of the transmission channel that Block Error Rate is the highest in all transmission channels, make other each transmission channels be unlikely to too high Block Error Rate to occur, thereby guaranteed the transmission quality of all transmission channels.
If the transmission quality of certain transmission channel is better relatively, so, the signal interference ratio desired value of this transmission channel that calculates also can be lower than the signal interference ratio desired value of correspondence of the transmission channel of other poor transmission.So, to carry out the signal interference ratio desired value of power control among the present invention and get the maximum in the signal interference ratio desired value in all transmission channels, this signal interference ratio desired value correspondence the poorest transmission channel of transmission quality.Under the situation of the transmission quality that has guaranteed the transmission channel that this transmission quality is the poorest, the transmission quality of other transmission channel also just is guaranteed.And, because the signal interference ratio desired value of choosing among the present invention as current power control is the poorest pairing signal interference ratio desired value of transmission channel of transmission quality in all transmission channels, therefore, also guaranteed the reasonability of the signal interference ratio desired value chosen, carry out power control based on this signal interference ratio desired value, Poewr control method more of the prior art has better been saved transmitting power.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification and the execution mode, it can be applied to various suitable the field of the invention fully, for those skilled in the art, can easily realize other modification, therefore under the universal that does not deviate from claim and equivalency range and limited, the legend that the present invention is not limited to specific details and illustrates here and describe.
Claims (6)
1. the Poewr control method of composite service in the mobile communication system is characterized in that step comprises:
Step 1, determine the signal interference ratio desired value that each transmission channel is current, wherein, if not first power control, described each transmission channel equals the signal interference ratio desired value of each comfortable previous moment and the adjustment amount sum of signal interference ratio desired value in the signal interference ratio desired value of current time;
Step 2 is selected maximum from the signal interference ratio desired value of above-mentioned each transmission channel, with the signal interference ratio desired value of this maximum as current power control; The difference that the signal interference ratio desired value and the signal interference ratio desired value of current power control are adjusted base value is compared with the signal interference ratio desired value of current any one transmission channel, get that maximum is the signal interference ratio desired value of corresponding transmission channel after upgrading among the two;
Step 3, the signal interference ratio desired value of controlling according to above-mentioned current power draws power control bit, carries out transmitting power control.
2. Poewr control method as claimed in claim 1 is characterized in that, in the described step 1, when first power was controlled, the initial value of the signal interference ratio desired value of each transmission channel set in advance.
3. Poewr control method as claimed in claim 2 is characterized in that, described signal interference ratio desired value is adjusted base value and is provided with according to the Block Error Rate distributed needs.
4. Poewr control method as claimed in claim 1 is characterized in that the adjustment amount of described signal interference ratio desired value calculates according to the Block Error Rate of this transmission channel.
5. Poewr control method as claimed in claim 1 is characterized in that, in the described step 3, when uplink power control, terminal is regulated transmitting power according to the power control bit that the base station issues.
6. Poewr control method as claimed in claim 1 is characterized in that, in the described step 3, when descending power was controlled, the power control bit that send according to terminal the base station was regulated transmitting power.
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| CN200610082781A CN1983850B (en) | 2006-05-25 | 2006-05-25 | Method for controlling power of combined service in mobile telecommunication system |
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| CN200610082781A CN1983850B (en) | 2006-05-25 | 2006-05-25 | Method for controlling power of combined service in mobile telecommunication system |
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| CN1983850A CN1983850A (en) | 2007-06-20 |
| CN1983850B true CN1983850B (en) | 2010-05-12 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6633553B1 (en) * | 1998-12-31 | 2003-10-14 | Samsung Electronics Co., Ltd. | Apparatus and method for forward power controlling in CDMA mobile telecommunication system |
| CN1682543A (en) * | 2002-09-12 | 2005-10-12 | 美商内数位科技公司 | Method and system for adjusting downlink outer loop power to control target SIR |
| CN1722633A (en) * | 2004-07-13 | 2006-01-18 | 华为技术有限公司 | Method of outer ring power control for combined service of WCDMA system |
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- 2006-05-25 CN CN200610082781A patent/CN1983850B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6633553B1 (en) * | 1998-12-31 | 2003-10-14 | Samsung Electronics Co., Ltd. | Apparatus and method for forward power controlling in CDMA mobile telecommunication system |
| CN1682543A (en) * | 2002-09-12 | 2005-10-12 | 美商内数位科技公司 | Method and system for adjusting downlink outer loop power to control target SIR |
| CN1722633A (en) * | 2004-07-13 | 2006-01-18 | 华为技术有限公司 | Method of outer ring power control for combined service of WCDMA system |
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| 同上. |
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