CN1180637C - Channel power control method in high speed data insertion system - Google Patents
Channel power control method in high speed data insertion system Download PDFInfo
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- CN1180637C CN1180637C CNB011451424A CN01145142A CN1180637C CN 1180637 C CN1180637 C CN 1180637C CN B011451424 A CNB011451424 A CN B011451424A CN 01145142 A CN01145142 A CN 01145142A CN 1180637 C CN1180637 C CN 1180637C
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Abstract
The present invention discloses a channel power control method for a high-speed data access system, which comprises: under the state of non soft handover of UE, the offset power of different transmitting power and DPCH transmitting power corresponding to DPCHHI and HS-SCCH; a target signal-to-noise ratio of DPCHHI and a variation threshold value of the DPCHHI signal-to-noise ratio are set under the state of soft handover of UE; the offset power of the transmitting power of HS-SCCH and the transmitting power of DPCHHI is set; when UE lies in the non soft handover state, a method that offset power is added to DPCH transmitting power is used for determining the transmitting power of DPCHHI and HS-SCCH; when UE lies in the soft handover state, a method that a power control command is transmitted to DPCHHI according to a channel condition is used for completing the power control of DPCHHI and HS-SCCH. The present invention has the advantages of higher precision and better adaptability and controllability.
Description
Technical field
The present invention relates to the Poewr control method in the wireless communication system, be specifically related to the channel power control method in the high-speed data access system.
Background technology
For adapting to the demand of wireless high-speed data business development, introduced down high-speed data access (HSDPA) technology in 3-G (Generation Three mobile communication system), the key of this technology is to adopt mixing to retransmit (HARQ) and adaptive modulation and coding technology (AMC) automatically the transmission of data is controlled.In order to make the data of the reception down high speed sharing channel (HS-DSCH) that user terminal (UE) can be correct, network side must issue the relevant information that channel code information, data-modulated and coded system, transport block set, mixing retransmit downlink datas such as (HARQ) Sub-Channel Number automatically, these information go up transmission at downlink high-speed shared control channel (HS-SCCH), according to the needs of descending relevant information, each UE can assignment 1 to 4.Therefore, when the number of the HS-SCCH of transmission downlink signaling more than 1 the time, need carry relative downlink signaling for which HS-SCCH HS-DSCH points out.At this moment, need to carry HS-DSCH data indications (HI) on the DPCH more, carry the HS-SCCH of HS-DSCH signaling accordingly to indicate to UE.In each TTI, HS-SCCH carries the relevant downlink signaling of HS-DSCH of a UE, and signaling comprises transport format resource indication (TFRI) information, HARQ relevant information.For guaranteeing HI and HS-SCCH can correctly be received and interference that system is produced is as much as possible little, therefore need carry out power control to it.But, in existing high-speed data access system, have only original up-downgoing DPCH DPCCH and DPCH to cooperatively interact and carry out power control, do not comprise power control to HS-SCCH and HI, therefore, the control of the power of HS-SCCH and HI can only be carried out with reference to the order of original DPCH downlink power control.
According to present power control processing method, upload the power control commands of DPCH at DPCCH, the transmitting power of DPCH is adjusted according to the power control commands that receives in the base station.If there is HI to exist on the DPCH, the transmitting power of HI adopts and add fixing power bias on the transmitting power basis of DPCH.This constant power biasing is the power bias that HI and DPCH are set according to worst situation, owing to can not change the transmitting power of HI flexibly according to the quality of down channel, therefore only can guarantee that the HI under the abominable situation of channel condition can correctly receive in this sub-district, under the reasonable situation of channel condition, will increase descending interference, reduce downlink capacity.The above-mentioned method that adds fixing power bias can produce bigger problem in soft handover (SHO) zone, and the downlink signaling that the HS-DSCH of UE is relevant only sends in the Serving cell of the place of HS-DSCH, and all can there be transmission DPCH all base stations in active set.And the power control commands on the DPCCH that receives of base station to be UE carry out comprehensive computing according to the down channel quality of each base station in the active set obtains, the DPCH information that guarantees this base station surely that differs can correctly be received.This just causes the error code of HI to increase, and is also bigger to systematic influence.Also there is above-mentioned similar problem in HS-SCCH.Therefore it is relatively poor to utilize existing method to carry out adaptability and controllability that the relevant signaling power with HS-DSCH of HS-SCCH controls, and precision is not high.
Summary of the invention
The object of the present invention is to provide the channel power control method in the higher high-speed data access system of a kind of precision, use this method that HS-SCCH and HI are carried out power control and have preferably adaptability and controllability.
For achieving the above object, the channel power control method in the high-speed data access system provided by the invention comprises:
(1) system is provided with user equipment (UE) under non-soft changing state, data indication DPCH HI and the different transmission power of downlink high-speed shared control channel HS-SCCH correspondence and the bias power P1 and the P2 of DPCH DPCH transmitting power on the downlink dedicated physical control channel;
(2) system's target signal to noise ratio, the indication of the data on downlink dedicated physical control channel DPCH HI signal to noise ratio that the user equipment (UE) data on downlink dedicated physical control channel indications DPCH HI under soft changing state is set changes threshold value, and the transmitting power that downlink high-speed shared control channel HS-SCCH is set is indicated the bias power P3 of the transmitting power of DPCH HI with the data on the downlink dedicated physical control channel;
(3) base station judges whether user equipment (UE) is in soft changing state; If change step (5); Otherwise, enter step (4);
(4) transmitting power of determining the data indications DPCH HI on the downlink dedicated physical control channel is that the transmitting power of DPCH DPCH adds bias power P1; The transmitting power of downlink high-speed shared control channel HS-SCCH is that the transmitting power of DPCH DPCH adds bias power P2, finishes this power control operation then;
(5) user equipment (UE) is measured the signal to noise ratio of the indication of the data on the downlink dedicated physical control channel that receives DPCH HI, the target signal to noise ratio of data on measurement result and downlink dedicated physical control channel indication DPCH HI is compared, if surpassing signal to noise ratio, result relatively changes threshold value, reduce the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel to base station feedback, otherwise increase the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel to base station feedback;
(6) power control commands of the data indication DPCH HI on the downlink dedicated physical control channel that receives is judged in the base station, if reduce the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel, then the data on downlink dedicated physical control channel indications DPCH HI transmitting power is reduced a step-length, and the data indication DPCH HI transmitting power that the transmitting power of downlink high-speed shared control channel HS-SCCH is adjusted on the downlink dedicated physical control channel that reduces step-length is added P3; If increase the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel, then the indication of the data on downlink dedicated physical control channel DPCH HI transmitting power is increased a step-length, and with the transmitting power of downlink high-speed shared control channel HS-SCCH at a high speed for the indication of the data on the downlink dedicated physical control channel that increases step-length DPCH HI transmitting power adds P3, finish this power control operation then.
Described method also comprises: set up form on the soft handover area channel quality, in order to reduce the power control commands of the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel or the data indication DPCH HI transmitting power on the increase downlink dedicated physical control channel to base station feedback when user equipment (UE) is in soft handover area;
Described regional channel form qualitatively comprises following field:
Transport format resource indication TFRI: be used to be provided with the metrical information indication of down high speed sharing channel HS-DSCH;
Transmission format resource combination TFRC: the corresponding transmission format resource combination TFRC information of transport format resource indication TFRI that is used to be provided with and identify down high speed sharing channel HS-DSCH quality measurement information;
Down high speed sharing channel power bias (HS-DSCH Power Offset): be used to be provided with the down high speed sharing channel HS-DSCH different transmission power of transport format resource indication TFRI correspondence and the bias power of pilot channel (CPICH) transmitting power;
Described transport format resource indication TFRI field is 5 bits, wherein 4 bits are used to identify the transport format resource indication information, and 1 bit is used to identify to the power control commands that reduces the data indication DPCH HI transmitting power on the downlink dedicated physical control channel of base station feedback or the power control commands of the data indication DPCH HI transmitting power on the increase downlink dedicated physical control channel.
Above-mentioned steps (5) can be finished by following step to the power control commands that base station feedback increases or reduce the data indication DPCH HI transmitting power on the downlink dedicated physical control channel:
(A1), be used to identify corresponding bits position to the power control commands of base station feedback with what the sign that increases or reduce the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel placed transport format resource indication TFRI field according to the power control commands that will feed back;
(A2) to base station feedback transport format resource indication TFRI information.
Because the present invention is when UE is in non-soft handover area, DPCH is carried out independent power control, dynamically according to the transmitting power of the quality adjustment HI and the HS-SCCH of downlink dedicated channels, accuracy is higher, uses this method that HI and HS-SCCH are carried out power control and has preferably adaptability and controllability.
Description of drawings
Fig. 1 is the embodiment flow chart of the inventive method.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
In the high-speed down data connecting system, the reference transmit power of DPCH is to carry out closed-loop control by the power control command that up Dedicated Control Channel is carried, at non-soft handover area, DPCH only has only one, power control commands is that UE does not handle through merging, therefore this power command is that condition according to this DPCH produces, and the adjustment of reference transmit power meets the variation of current channel condition.Because HI and downlink high-speed shared control channel information and pilot signal are sent in sign indicating number branch mode by same base station, receive by same terminal, the channel condition of their processes, for example noise and decline are essentially identical, just on target frame error rate, coded system and the sign indicating number spreading factor of information, have any different, as long as consider the power deviation of these factors.Therefore at non-soft handover area, the transmitting power of data indication can add fixing biasing for the reference transmit power of DPCH, and the transmitting power of HS-SCCH also can add fixing biasing for the reference transmit power of DPCH.
When UE is in soft handover area, power control commands merges generation through UE, there are the adjustment of reference transmit power of DPCH of high-speed data service sub-district and the incongruent situation of condition of current this channel, therefore add that on this reference transmit power basis fixed bias also can't meet this trend, unless bias power is provided with according to the poorest situation is maximum, but this certainly will cause the power dissipation of ordinary circumstance and disturb increase.
Essence of the present invention is, when UE is in non-soft handover area, uses the transmitting power of DPCH to add that the method for constant power biasing is provided with sending out and power of DPCH HI and HS-SCCH; When UE entered soft handover (SHO) zone, the transmitting power of DPCH HI and HS-SCCH adopted the control method that is independent of the DPCH transmitting power, to solve the problem that occurs when UE is in soft handover area.
In the concrete enforcement of the present invention, because when UE is in soft handover area, need reduce the power control commands of DPCH HI transmitting power or the power control commands of increase DPCH HI transmitting power to base station feedback, need the busy channel resource and send power control commands, therefore need by solving the channel resource problem.
In the conventional method, the metrical information indication of down channel quality can be indicated (TFRI) to represent by transport format resource, up feedback has defined 6 kinds of transformats and combination of resources (TFRC), and each TFRC has defined modulation system, transport block set size and code channel number.When the down channel actual measurement, can also identify the power bias of HS-DSCH and pilot channel (CPICH) to the concrete refinement of each TFRC, with reference to following table, on measurement result, give the correct time, last sequence number in the report following table, promptly TFRI is just passable.In the conventional method, the length of TFRI is 5 bits, can represent 32 transformats and combination of resources.
| TFRC | ?HS-DSCH?Power?offset | ?TFRI |
| TFRC1 | ?12dB | ?0 |
| ?11dB | ?1 | |
| ?10dB | ?2 | |
| ?9dB | ?3 | |
| ?8dB | ?4 | |
| ?7dB | ?5 | |
| ?6dB | ?6 | |
| ?5dB | ?7 | |
| ?4dB | ?8 | |
| ?3dB | ?9 | |
| ?2dB | ?10 | |
| ?1dB | ?11 |
| ?0dB | ?12 | |
| ?TFRC2 | ?2dB | ?13 |
| ?1dB | ?14 | |
| ?0dB | ?15 | |
| ?TFRC3 | ?2dB | ?16 |
| ?1dB | ?17 | |
| ?0dB | ?18 | |
| ?TFRC4 | ?2dB | ?19 |
| ?1dB | ?20 | |
| ?0dB | ?21 | |
| ?TFRC5 | ?2dB | ?22 |
| ?1dB | ?23 | |
| ?0dB | ?24 | |
| ?TFRC6 | ?2dB | ?25 |
| ?1dB | ?26 | |
| ?0dB | ?27 | |
| ?NA | ?NA | ?28 |
| ?NA | ?NA | ?29 |
| ?NA | ?NA | ?30 |
| ?NA | ?NA | ?31 |
Last table satisfied in theory UE be in various channel conditions the dynamic change scope.But in fact after UE enters soft handover area, the condition variation of channel, the dynamic change scope of channel is dwindled, and therefore this table is reduced by half at soft handover area, make the length of TFRI become 4 bit, 1 bit of vacating is used for the transmission of data indication (HI) power control commands.
| ?TFRC | ?Power?offsetl ?(HS-DSCH) | ?TFRI |
| ?TFRC1 | ?12dB | ?0 |
| ?11dB | ?1 | |
| ?10dB | ?2 | |
| ?9dB | ?3 | |
| ?8dB | ?4 | |
| ?7dB | ?5 | |
| ?6dB | ?6 | |
| ?5dB | ?7 | |
| ?4dB | ?8 |
| ?3dB | ?9 | |
| ?2dB | ?10 | |
| ?1dB | ?11 | |
| ?0dB | ?12 | |
| ?TFRC2 | ?2dB | ?13 |
| ?1dB | ?14 | |
| ?0dB | ?15 | |
| ?TFRC3 | ?2dB | ?16 |
Adopt this method, HI fully carries out closed power control according to own channel condition and target signal to noise ratio, and then transmitting power can meet channel variation and reaches the best.Because information and the HI of HS-SCCH are sent by the high-speed data service sub-district when soft handover equally uniquely, the channel condition of process is basic identical, the adjustment of therefore working as the emitted power of HI meets channel variation, and then downlink high-speed shared control channel information transmitting power is as long as add on HI owing to coded system, the different needed constant power biasings with target signal to noise ratio of spreading factor.
Fig. 1 is the embodiment flow chart of the inventive method.Implement the present invention according to Fig. 1, at first will carry out step 1 and step 2, system is provided with UE under non-soft changing state, the different transmission power of DPCH HI and HS-SCCH correspondence and the bias power P1 and the P2 of DPCH transmitting power; Target signal to noise ratio, DPCH HI signal to noise ratio that UE DPCH HI under soft changing state also will be set change threshold value, and the bias power P3 that the transmitting power of the transmitting power of HS-SCCH and DPCH HI is set.Carrying out power adjustment when control, in step 3, the base station judges whether UE is in soft changing state, if be in non-soft changing state, carry out step 4, and the base station determines that the transmitting power of DPCH HI is that the transmitting power of DPCH adds bias power P1; The transmitting power of HS-SCCH is that the transmitting power of DPCH adds bias power P2, finishes this power control operation then; Otherwise in step 5, UE measures the signal to noise ratio of the DPCH HI that receives, the target signal to noise ratio of measurement result and DPCH HI is compared, if surpassing signal to noise ratio, result relatively changes threshold value, therefore illustrate that this moment channel condition is better, reduce the power control commands of DPCH HI transmitting power in step 7 to base station feedback, to reduce the transmitting power of DPCH HI, otherwise the channel condition that be described this moment is relatively poor, need increase the power control commands of DPCH HI transmitting power in step 8 to base station feedback.The power control commands of the DPCH HI that receives is judged in the base station in step 9, if reduce the power control commands of DPCH HI transmitting power, then DPCH HI transmitting power is reduced a step-length, and the transmitting power of HS-SCCH is adjusted into the DPCH HI transmitting power that reduces step-length adds P3; If increase the power control commands of DPCH HI transmitting power, then the DPCHHI transmitting power is increased a step-length, and the transmitting power of HS-SCCH is adjusted into the DPCH HI transmitting power that increases a step-length adds P3, finish this power control operation then.Above-mentioned step-length can obtain by emulation mode.
When the present invention specifically implements, for increase or reduce the power control commands of DPCH HI transmitting power to base station feedback, also need to set up form on the soft handover area channel quality, this table comprises following field:
Transport format resource indication (TFRI): be used to be provided with the metrical information indication of down high speed sharing channel (HS-DSCH);
Transmission format resource combination (TFRC): the corresponding TFRC information of TFRI that is used to be provided with and identify the HS-DSCH quality measurement information;
Down high speed sharing channel power bias (HS-DSCH Power Offset): the bias power that is used to be provided with the HS-DSCH different transmission power and pilot channel (CPICH) transmitting power of TFRI correspondence;
Described TFRI field is 5 bits, wherein 4 bits are used to identify the transport format resource indication information, 1 bit is used to identify to the power control commands that reduces DPCH HI transmitting power of base station feedback or increases the power control commands of DPCH HI transmitting power, and is unqualified to the particular location of the information of this 1 bit.
On last table basis, in step 7 and step 8, promptly can finish by following step to the power control commands of base station feedback minimizing or increase DPCHHI transmitting power:
(1), is used to identify corresponding bits position to the power control commands of base station feedback with what the sign that increases or reduce the power control commands of DPCH HI transmitting power placed the TFRI field according to the power control commands that will feed back;
(2) to base station feedback TFRI information.
Claims (4)
1, the channel power control method in a kind of high-speed data access system comprises:
(1) system is provided with user equipment (UE) under non-soft changing state, data indication DPCH HI and the different transmission power of downlink high-speed shared control channel HS-SCCH correspondence and the bias power P1 and the P2 of DPCH DPCH transmitting power on the downlink dedicated physical control channel;
(2) system's target signal to noise ratio, the indication of the data on downlink dedicated physical control channel DPCH HI signal to noise ratio that the user equipment (UE) data on downlink dedicated physical control channel indications DPCH HI under soft changing state is set changes threshold value, and the transmitting power that downlink high-speed shared control channel HS-SCCH is set is indicated the bias power P3 of the transmitting power of DPCH HI with the data on the downlink dedicated physical control channel;
(3) base station judges whether user equipment (UE) is in soft changing state; If change step (5); Otherwise, enter step (4);
(4) transmitting power of determining the data indications DPCH HI on the downlink dedicated physical control channel is that the transmitting power of DPCH DPCH adds bias power P1; The transmitting power of downlink high-speed shared control channel HS-SCCH is that the transmitting power of DPCH DPCH adds bias power P2, finishes this power control operation then;
(5) user equipment (UE) is measured the signal to noise ratio of the indication of the data on the downlink dedicated physical control channel that receives DPCH HI, the target signal to noise ratio of data on measurement result and downlink dedicated physical control channel indication DPCH HI is compared, if surpassing signal to noise ratio, result relatively changes threshold value, reduce the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel to base station feedback, otherwise increase the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel to base station feedback;
(6) power control commands of the data indication DPCH HI on the downlink dedicated physical control channel that receives is judged in the base station, if reduce the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel, then the data on downlink dedicated physical control channel indications DPCH HI transmitting power is reduced a step-length, and the data indication DPCH HI transmitting power that the transmitting power of downlink high-speed shared control channel HS-SCCH is adjusted on the downlink dedicated physical control channel that reduces step-length is added P3; If increase the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel, then the indication of the data on downlink dedicated physical control channel DPCH HI transmitting power is increased a step-length, and with the transmitting power of downlink high-speed shared control channel HS-SCCH at a high speed for the indication of the data on the downlink dedicated physical control channel that increases step-length DPCH HI transmitting power adds P3, finish this power control operation then.
2, the channel power control method in the high-speed data access system according to claim 1, it is characterized in that this method also comprises sets up form on the soft handover area channel quality, in order to reduce the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel or to increase the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel to base station feedback when user equipment (UE) is in soft handover area;
Described regional channel form qualitatively comprises following field:
Transport format resource indication TFRI: be used to be provided with the metrical information indication of down high speed sharing channel HS-DSCH;
Transmission format resource combination TFRC: the corresponding transmission format resource combination TFRC information of transport format resource indication TFRI that is used to be provided with and identify down high speed sharing channel HS-DSCH quality measurement information;
Down high speed sharing channel power bias HS-DSCH Power Offset: be used to be provided with the down high speed sharing channel HS-DSCH different transmission power of transport format resource indication TFRI correspondence and the bias power of pilot channel CPICH transmitting power;
Described transport format resource indication TFRI field is 5 bits, wherein 4 bits are used to identify the transport format resource indication information, and 1 bit is used to identify to the power control commands that reduces the data indication DPCH HI transmitting power on the downlink dedicated physical control channel of base station feedback or the power control commands of the data indication DPCH HI transmitting power on the increase downlink dedicated physical control channel.
3, the channel power control method in the high-speed data access system according to claim 2 is characterized in that the power control commands of the data indication DPCH HI transmitting power of step (5) on base station feedback increase or minimizing downlink dedicated physical control channel is finished by following step:
(A1), be used to identify corresponding bits position to the power control commands of base station feedback with what the sign that increases or reduce the power control commands of the data indication DPCH HI transmitting power on the downlink dedicated physical control channel placed transport format resource indication TFRI field according to the power control commands that will feed back;
(A2) to base station feedback transport format resource indication TFRI information.
4, the channel power control method in the high-speed data access system according to claim 1 is characterized in that step-length obtains by emulation mode described in the step (6).
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|---|---|---|---|
| CNB011451424A CN1180637C (en) | 2001-12-30 | 2001-12-30 | Channel power control method in high speed data insertion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011451424A CN1180637C (en) | 2001-12-30 | 2001-12-30 | Channel power control method in high speed data insertion system |
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| CN1180637C true CN1180637C (en) | 2004-12-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179476B (en) * | 2006-11-09 | 2010-06-02 | 大唐移动通信设备有限公司 | Method, device and system for transmitting MBMS service using HSDPA |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353797C (en) * | 2004-11-12 | 2007-12-05 | 华为技术有限公司 | Method for detecting up enhancement special physical control channel |
| CN1841958B (en) * | 2005-03-28 | 2010-04-28 | 华为技术有限公司 | Method and apparatus for realizing uplink outer-loop power control in mobile communication system |
| CN100373806C (en) * | 2005-11-02 | 2008-03-05 | 中兴通讯股份有限公司 | High speed shared control channels and method for realizing high speed shared information channel power |
| CN1972170B (en) * | 2005-11-22 | 2010-05-05 | 上海明波通信技术有限公司 | Wireless communication channel detection method |
| CN101426229B (en) * | 2007-11-01 | 2010-08-25 | 大唐移动通信设备有限公司 | Method for double flow transmission, apparatus and system therefor |
| CN101252379B (en) * | 2008-04-16 | 2011-07-20 | 中国科学院计算技术研究所 | Wireless network medium access control system and channel parameter regulation method |
| CN101291162B (en) * | 2008-06-24 | 2012-03-07 | 中兴通讯股份有限公司 | Method and device for realizing power control of downlink high-speed shared control channel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101179476B (en) * | 2006-11-09 | 2010-06-02 | 大唐移动通信设备有限公司 | Method, device and system for transmitting MBMS service using HSDPA |
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