CN1894865A

CN1894865A - Method and system for outer loop power control

Info

Publication number: CN1894865A
Application number: CN 200480037128
Authority: CN
Inventors: B·林多夫; L·安德松
Original assignee: Telefonaktiebolaget LM Ericsson AB
Current assignee: Telefonaktiebolaget LM Ericsson AB
Priority date: 2003-10-17
Filing date: 2004-10-12
Publication date: 2007-01-10
Also published as: ZA200603024B

Abstract

Methods and apparatus are described for improving convergence time of a reference signal-to-interference(SIR) value calculated in outer loop power control for use in inner loop power control. Instead of considering only error rate information for each transport channel individually, other information, such as quality information from other transport channels and block rate information for the channel, is also considered to determine the reference SIR. By considering such other information, an improved outer loop power control is achieved, thus reducing the power needed for the physical channel and increasing the capacity of the communication system.

Description

The method and system that is used for exterior ring power control

Background technology

The present invention relates to be specially the control of the power level that transmits in the telecommunication system of honeycomb spread spectrum system.

Digital communication system comprises time division multiple access (TDMA) system, as meet the GSM telecommunication standard and as the cellular radio telephone systems of the enhancing of GSM/EDGE, and code division multiple access (CDMA) system, as meet the cellular radio telephone systems of IS-95, cdma2000 and WCDMA telecommunication standard.Digital communication system also comprises " mixing " TDMA and cdma system, as meet the cellular radio telephone systems of Universal Mobile Telecommunications System (UMTS) standard, the third generation (3G) mobile system that this standard code is developed in the IMT-2000 of International Telecommunication Union framework by ETSI (ETSI).Third generation partnership projects (3GPP) issue UMTS standard.For the sake of simplicity, the application's emphasis is placed on the WCDMA system, but will understand principle described in the application can implement in other digital communication systems.

WCDMA is based on direct sequence spread spectrum skill.Two different sign indicating numbers are used for the physical channel on base station and down link (base station is to the terminal) direction is distinguished.Scrambler is to be mainly used in pseudo noise (pn) sequence that base station or sub-district are distinguished from each other.Channel code is the orthogonal sequence that is used for distinguishing the different physical channels (terminal or user) under each sub-district or each scrambler.Because all users share identical radio resource in cdma system, be important so each physical channel only uses essential power.This point realizes by a kind of transmitting power controlling mechanism, wherein terminal is estimated the signal-to-jamming ratio (SIR) of its DPCH (DPCH), estimated SIR and reference value are compared, and informing base station is adjusted to suitable level with the emission DPCH power of base station.Here use the WCDMA term, but will recognize that other system has corresponding term.

3GPP is being devoted to the development of WCDMA, is called high speed downlink packet access visit (HSDPA).This enhancing to existing system has increased capacity, reduced round-trip delay and has made the peak data rate maximum be increased to 8-10Mbit/s.

In general, transmission channel is used for through special use or public physic channel carrying user data.For HSDPA, transmission channel is high-speed downlink shared channel (HS-DSCH).The corresponding physical channel is represented by High-Speed Physical Downlink Shared Channel (HS-PDSCH).HS-DSCH sign indicating number resource comprises the one or more fixedly channel codes of spread spectrum coefficient 16 that have.Be used for other required control and Data-carryings in order to reserve enough spaces, can distribute maximum 15 this sign indicating numbers.Available sign indicating number resource is mainly shared in time domain.For example, can give a user with their primary distributions.Perhaps, can use the multiplexed sign indicating number resource of sharing of sign indicating number.In this case, in same Transmission Time Interval (TTI), two to four users share the sign indicating number resource.

Except user data, also must transmit the control signaling and notify the next subscriber equipment that to dispatch (UE), as travelling carriage, PDA(Personal Digital Assistant) or other receivers.This signaling is to be that shared High-Speed Shared Control Channel (HS-SCCH) is gone up enforcement for all users.The HSDPA notion also need be in up link a kind of additional High-Speed Dedicated Physical Control Channel (HS-DPCCH), be used to carry CQI (CQI) information except that H-ARQ confirms.

Fig. 1 illustrates a kind of communication system as the WCDMA system, this communication system comprises base station (BS) 100, this base station is handled and is respectively used down link (that is, the base station is to UE or forward direction) and up link (that is, UE to the base station or reverse) channel and four UE1,2,3,4 be connected.In down link, BS 100 launches to each UE with corresponding power level, and uses orthogonal code to the signal spread-spectrum by BS 100 emissions.In up link, UE1-UE4 launches to BS 100 with corresponding power level.Though not shown, BS 100 also communicates by letter with radio network controller (RNC), radio network controller is communicated by letter with public switch telephone network (PSTN) then.

The signal of launching in demonstration WCDMA system shown in Figure 1 can constitute as follows.At first the inter-area traffic interarea that will launch and channel code multiply each other, and then result and scrambler are multiplied each other.These multiply each other and usually carry out by XOR, and inter-area traffic interarea and scrambler can have identical or different bit rate.Be each inter-area traffic interarea or the unique channel code of channel allocation, and a plurality of information encoded signal while modulated RF carrier signal.On UE (or other receivers), handle institute's modulated carrier signal to produce the estimation of expection to the original information data stream of this receiver.This process is called demodulation.

Good transmit power controlling method minimizes the mutual interference mutually of this type of reflector and guarantees that high power system capacity is important for having many WCDMA (with other) communication systems of the reflector of emission simultaneously.Concrete viewing system feature and decide, it can be important that the power in this type systematic is controlled for up link, down link or the transmission in the two.In order to realize that each UE goes up the reliable reception of signal, the SIR of received signal should surpass the defined threshold of each UE.For example, as shown in Figure 1, consider that these UE are received in the situation of four signals on the public WCDMA communication channel respectively.Each signal has corresponding energy level associated therewith, promptly is respectively energy level E1, E2, E3 and E4.Also has plenty of certain noise level (N) on the communication channel.For the given UE1 of the expection signal that receives it rightly, the total level of E1 and E2, E3, E4 and the ratio between the N must be higher than the defined threshold SIR of given UE.

Improve the SIR of received signal, can increase the power that transmits, specifically decide on the SIR that records on the receiver.But power is the valuable source in the WCDMA system.Because different channels is launched simultaneously with same frequency, so that power level on each physical channel keeps hanging down the error rate accepted of still keeping the user data block that receives on the transmission channel simultaneously as far as possible is that BLER (block error rate) (BLER) is important.

Can logically downlink power control be divided into " interior ring " and " outer shroud ", wherein interior ring is controlled SIR by send through-put power control (TPC) order to the base station, and outer shroud provides the SIR reference to come control of quality according to BLER by inside ring.

Conventional power control techniques calculates a SIR reference for each transmission channel, and this calculates BLER and BLER reference based on this transmission channel, and uses maximum in these SIR references by interior ring.A kind of conventional power control system of the block diagram illustrations of Fig. 2.Have the BLER controller 211,212 that is associated etc. through each transmission channel 201,202 of the physical channel communication of system 200 etc., the BLER controller is determined current BLER and with the target BLER of itself and channel (also be called BLER with reference to) BLER _RefRelatively produce the SIR of the channel that is associated with reference to SIR _RefSIR _RefThe target SIR of expression channel.The BLER of channel _RefCreate according to quality requirement and other parameters just by system in the data of this channel.For example, speech data can have the quality requirement higher than text data.Usually in more high-rise communication with these quality requirements of signalisation.Determine 220 these SIR with reference in maximum and it is forwarded to SIR controller 230.SIR controller 230 is based on SIR _RefGenerate inner loop power control command 240 with current SIR.

The target of exterior ring power control is to make BLER on each transmission channel keep below their BLER reference, minimum power requirement simultaneously.The BLER controller 211,212 of each transmission channel etc. comprises the BLER estimator and controls corresponding SIR _RefSo that the BLER that estimates keeps near the BLER reference value BLER that still is lower than this channel _RefEstimate current BLER based on the Cyclic Redundancy Check of corresponding transmission channel, usually when receive incorrect CRC be " 1 " maybe when receiving correct piece CRC be " 0 ".Therefore can be simply based on incorrect (CRC is " 1 ") recently definite BLER with the sum of the piece that receives.Each controller 211,212 etc. calculate corresponding SIR _Ref, when receiving each new piece, upgrade SIR _RefThe SIR of given channel _RefAlong with BLER increases and increases, because increase SIR reference value causes the requirement to the higher SIR of current demand signal.Will be by SIR controller 230 from the SIR of transmission channel 201,202 etc. _RefIn have the SIR of peak _RefWith the current SIR of the physical channel of system 200 relatively, to produce the power that inner loop power control command 240 is adjusted on the physical channel.Because the highest SIR _RefCorresponding to having the transmission channel of the highest BLER, promptly with regard to increasing SIR, need maximum attention, so use the highest SIR _Ref

Radio industry and commercial guild (ARIB) " standard of the air interface of 3G mobile system " a kind of use of regulation is called the algorithm of " jump algorithm " and realizes the straightforward procedure that outer shroud is controlled.In jump algorithm, BLER is represented by CRC.Mistake e be CRC and BLER with reference between poor, as shown in Equation (1), according to formula (2) with it in conjunction with obtaining the SIR reference.

e＝CRC-BLER _ref (1)

SIR _ref(k+1)＝SIR _ref(k)+Ke(k) (2)

Wherein K is applied gain.

When on transmission channel, receiving new piece, then upgrade jump algorithm at every turn.When each given TTI comprises background block error, SIR then _Ref" jumping " is to higher value.The SIR reference that is provided by conventional jump algorithm causes great variety.Therefore, as recognizing from Fig. 2, power will have great variety.If before CRC information is used by controller, estimate BLER to produce BLER through filtering _Est, then can obtain less variable power, formula in this situation (1) becomes formula (3).Can obtain BLER according to formula (4) estimates.

e＝BLER _est-BLER _ref (3)

BLER _est(k+1)＝α·BLER _est(k)+(1-α-β)·CRC(k)+β·CRC(k+1)(4)

Wherein α and β are constants, and α is according to for example α=10 ^-0.1BLERrefBased on BLER _RefThe time constant of the filter of come to determine selecting is so that the estimation of BLER is roughly based on the background block error of equal number.

At present as the problem of the conventional Poewr control method of jump algorithm be that when the quantity at the piece that receives during the given TTI is piece speed (BLR) when low, SIR is slow with reference to convergence on transmission channel.This is because along with BLR reduces, update controller is more and more not frequent, thereby causes slower convergence.This illustrates in the figure of Fig. 3, wherein uses the controller based on jump algorithm to come to generate the SIR reference when three different BLR are 100%BLR320,10%BLR310 and 1%BLR300.As cognoscible from figure, along with BLR reduces, the convergence cost longer time.

Convergence slowly causes the channel quality of difference or is higher than required power requirement.When SIR with reference to away from correct level the time, especially be a problem because BLER or power level will be all too high always on during the extra long time cycle, reduced power system capacity thus.When SIR is initialization with reference to too high normal conditions, use this moment high SIR with reference to guaranteeing to receive first data block.Therefore, the innovation power control techniques that needs to improve convergence time and reduce the required power level of physical channel thus.

Summary of the invention

Description is used for improving the method and apparatus that exterior ring power is controlled the convergence time of the reference SIR that is used for inner loop power control that calculates.Not the error rate information of only considering each transmission channel separately, also consider as determine with reference to SIR from other information of the piece rate information of other propagation channel quality information and this channel.By considering this type of other information, realize improved exterior ring power control, reduce the required power of physical channel thus and increase capability of communication system.

In one aspect, a kind of method that is used for the communication system power controlling comprises based on the data block of the data block that receives on first transmission channel and the second transmission channel determine BLER at least.Determine reference sir value based on the target BLER of this BLER and first transmission channel corresponding to first transmission channel.

Can with should with reference to sir value with at least one corresponding to another transmission channel other with reference to sir value relatively, thereby of maximum in the reference sir value that is compared is used for power controlling.

In yet another aspect, a kind of equipment that is used for the communication system power controlling comprises the logic of determining BLER at least based on the data block of the data block that receives on first transmission channel and the second transmission channel.Also have target BLER based on this BLER and first transmission channel to determine logic corresponding to the sir value of first transmission channel.

Can also comprise this with reference to sir value and at least one logic that is used for power controlling corresponding to maximum in other reference sir values of relatively also selecting to be compared with reference to sir value of another transmission channel.

Aspect another, a kind of method that is used for the communication system power controlling comprises the public BLER of the data block that receives on definite a plurality of transmission channels.Determine the public target BLER of a plurality of transmission channels.Determine reference sir value based on this public BLER and this target BLER corresponding to a plurality of transmission channels.Should be used for power controlling with reference to SIR.

Aspect another, a kind of equipment that is used for the communication system power controlling comprises the logic of the public BLER of the data block that receives on definite a plurality of transmission channels.Also comprise the public target BLER that determines a plurality of transmission channels and determine wherein should be used for power controlling with reference to SIR corresponding to the logic of the reference sir value of a plurality of transmission channels based on this public BLER and this target BLER.

Aspect another, a kind of method that is used for the communication system power controlling comprises the BLER of the data block that receives on definite transmission channel.Estimate the BLR of the data block that receives on this transmission channel.Determine reference sir value based on this BLER, target BLER and estimated BLR corresponding to this transmission channel.Consider that when power controlling this is with reference to SIR.

Aspect another, a kind of equipment that is used for the communication system power controlling comprises the logic of the BLER of the data block that receives on definite transmission channel.Also comprise the BLR that estimates the data block that receives on this transmission channel and determine logic, consider when power controlling that wherein this is with reference to SIR corresponding to the reference sir value of this transmission channel based on this BLER, target BLER and estimated BLR.

Aspect another, a kind of method that is used for the communication system power controlling comprises in the downward mode of increment type to be adjusted with reference to sir value.Monitor whether at least one has background block error with this with reference to the transmission channel that SIR is associated.When accumulative total on any transmission channel at least one transmission channel when receiving the mistake of predetermined quantity, the initial reference sir value of each transmission channel at least one transmission channel is made as the reference sir value of adjusting in the increment type mode.

Aspect another, a kind of equipment that is used for the communication system power controlling comprises in the downward mode of increment type to be adjusted with reference to the logic of sir value and monitors whether at least one and this transmission channel that is associated with reference to SIR have the logic of background block error.This equipment comprises additional logic, when accumulative total on any transmission channel at least one transmission channel when receiving the mistake of predetermined quantity, the initial reference sir value of each transmission channel at least one transmission channel is made as the reference sir value of adjusting in the increment type mode.

Brief Description Of Drawings

When those skilled in the art read this explanation in conjunction with the accompanying drawings, objects and advantages of the present invention will become apparent, and similar reference signs is used in reference to similar unit of generation among the figure, and among the figure:

Fig. 1 is the schematic diagram of explanation general communication system.

Fig. 2 is the block diagram of the conventional power control techniques of explanation.

Fig. 3 is the chart of illustrated block speed to the influence of convergence.

Fig. 4 is the block diagram of explanation according to the subscriber equipment logic of one aspect of the invention.

Fig. 5 is the block diagram of explanation according to the power control logic of one aspect of the invention.

Fig. 6 is the block diagram that power control logic according to a further aspect of the present invention is described.

Fig. 6 A is the block diagram that power control logic according to a further aspect of the present invention is described.

Fig. 7 is the block diagram that power control logic according to a further aspect of the present invention is described.

Fig. 8 is the block diagram that power control logic according to a further aspect of the present invention is described.

Fig. 9 is the flow chart that Poewr control method according to a further aspect of the present invention is described.

Figure 10 is the flow chart that Poewr control method according to a further aspect of the present invention is described.

Figure 11 is the flow chart that Poewr control method according to a further aspect of the present invention is described.

Figure 12 is the flow chart that Poewr control method according to a further aspect of the present invention is described.

Describe in detail

For the ease of understanding example embodiment, many aspects are according to describing by the unit executable operations sequence of computer system.For example, to recognize, in each embodiment, can be by special circuit or Circuits System (for example, interconnection is to carry out the discrete logic gate of dedicated functions), carry out various operations by the program command carried out by one or more processors or by the combination of the two.

Moreover, the sequence of operation can be included in any computer-readable medium, with by instruction execution system, equipment or device, as the computer based system, contain the system of processor or other can extract instruction and carry out these instructions from medium other system and use or be used in combination with it.

As described herein, " computer-readable medium " can be any parts that can comprise, store, transmit, propagate or transmit the program of being used or being used in combination with it by instruction execution system, equipment or device.Computer-readable medium can be such as but not limited to electricity, magnetic, light, electromagnetism, infrared ray or semiconductor system, unit or propagation medium.The more definite example of computer-readable medium (non exhaustive property is enumerated) can comprise following: electrical connection, portable computer diskette, random-access memory (ram), read-only memory (ROM), Erarable Programmable Read only Memory (EPROM or flash memory), optical fiber and portable optic disk read-only memory (CDROM) with one or more lines.

Therefore, the present invention can implement with many different forms, and all these type of forms are regarded as in the scope of claims.The embodiment of any this type of form can be called " logic that is configured to carry out described operation " in this article or be called " logic of carrying out described operation ".

In order to solve the shortcoming of conventional method, must reduce the convergence time when hanging down BLR.Transmission channel with BLR of minimizing will have the speed about the information of available BLER of proportional minimizing.The applicant describes variety of way with by using from the information of other transmission channels or increasing this minimizing that the confidence level of available information is come compensated information by taking steps.

In Fig. 4, a kind of exemplary transceiver is shown.For this explanation, transceiver can be regarded as in UE 110.But, will recognize that BS can comprise similar assembly.As shown in Figure 4, UE comprises that operation in a usual manner comes filtering, amplification reconciliation to transfer from the receiver 22 of the signal of antenna 20.Being provided with first decoder 24 is used for selectivity and receives the decode the signal on transmission channel from BS emission.Similarly, respectively at the signal of decoding on other channels on the second and the 3rd decoder 26 and 27.Processor 25 use in a known way from the dateout of these decoders come reconstruct and and output institute loaded information, the Voice ﹠ Video output of the video conference of wireless transmission for example is provided.Simultaneously, the information that obtains during decode procedure can be used for determining the SIR of the signal that received by UE 110 and carry out other mass measurements that for example BLER (and/or FER (Floating Error Rate) (FER)) calculates.Mass measurement/the control logic 28 that comprises the SIR that can calculate the signal that receives by UE.The SIR that calculates is provided to processor 25.

The BLER that handles measurement in mass measurement/control logic 28 is to determine the target SIR of down link, i.e. SIFR _RefFrom mass measurement/control logic 28 with SIR _RefBe forwarded to processor 25.Perhaps, BLER information can be forwarded to processor 25 handles to determine SIR _RefBy processor 25 treatment S IR _RefWith the SIR that calculates, to determine and which power control command (that is, " make progress " or " downwards ") will be included in the message that will send on up link and use in its power control unit (not shown) for BS.Perhaps, mass measurement/control logic 28 can be carried out some or all of this processing, and the result is provided to processor 25.By modulator 34 modulation power control commands and by reflector 32 it is transmitted into BS.

Fig. 5 is the block diagram of the general notion of explanation.Will from a plurality of transmission channels 401,402 etc. be provided to mass measurement/control logic 410 as BLER, CRC and BLR quality of information information, to be created in the SIR that uses in the inner loop power control on this physical channel _RefHandle 420 these SIR _RefWith current SIR, use in power control for BS to determine which inner loop power control command to be included in the message that sends on the up link.SIR handles 420 and is illustrated as independent logical block, but discussed as mentioned, this function can be carried out in mass measurement/control logic 410 or in independent processor.

According to example embodiment, not the error rate information of only considering each transmission channel separately, but by considering other information, will being used for the SIR that power is controlled as the piece rate information from other propagation channel quality information and this channel with definite _RefImprove convergence time.By considering this type of other information, realize improved exterior ring power control, reduce the required power of physical channel thus and increase capability of communication system.

With reference to figure 6, an embodiment of mass measurement/control logic 690 is shown.The quality control of first and second transmission channels 401,402 is logically respectively by frame 600 and 610 expressions.Mass measurement/control logic 690 the current available CRC information, is also handled the CRC information from other transmission channels on considering this channel, for example the CRC sign.That is, corresponding to the SIR of each channel _Ref601,611 not only determine according to the BLER that is determined by the CRC information of this channel, but also consider the estimation BLER information by the CRC information derivation of other channels " feed forward ".The feed forward of information can be limited to the cycle when not having CRC information on the channel of being considered, or can routinely consider the feed forward of information.Give weighted value to CRC information from the feed forward of other channels, i.e. gain, and determine BLER more accurately with the CRC information sets of current channel is incompatible, to be used for and BLER _RefRelatively come to determine corresponding SIR _Ref601,611.Compare the corresponding SIR of 620 each transmission channel then _Ref601,611 determine the maximum SIR that uses in inner loop power control _Ref

According to formula (5) with the CRC information CRC of channel n corresponding to the reception of one other channel m _nBy gain k _NmWeighting.

CRC _n＝K _nm·CRC _m (5)

K preferably wherein _Nm=BLER _n/ BLER _m

The code check that uses on the chnnel coding used on current SIR, each channel, each channel and other these type of factors that influence BLER are depended in the gain that is used for the CRC information of feed forward.For example, good channel coding (as using lower code check, more redundant digit etc.) will reduce BLER.Relatively come to determine gain between the parameter of the channel that is arrived according to feed forward channel and feed forward CRC.Therefore, relatively, the better coding on the channel of feed forward CRC increases gain K _Nm, and feed forward CRC to channel on better coding reduce gain K _Nm

This gain be estimate and need not accurately.Therefore will to produce BLER estimation devious be possible for feed forward and the CRC that is used for other channels, thereby cause the SIR deviation.But this deviation reduces along with the more piece of the piece that receives on the channel that receives on the given channel than the initiation feed forward.

Explanation is used for a kind of method of power controlling among Fig. 9 according to the embodiment of Fig. 6.Data block based on the data block that receives on first transmission channel and at least the second transmission channel is determined BLER (905).Determine reference sir value based on the target BLER of this BLER and first transmission channel corresponding to first transmission channel.

The foregoing description alternative shown in Fig. 6 A.BLER with different transmission channels _RefMake up 630 one-tenth public BLER _RefSimilarly, with 640 one-tenth public CRC of CRC information combination of different transmission channels.Handle 650 these public BLER _RefAnd CRC, to determine SIR _RefIn each case, corresponding channel parameter is preferably considered in combination, as the coding that uses, and will be from the BLER of different channels _RefAppropriately weighted with CRC, as mentioned above.

Use mass measurement/control logic 690 of Fig. 6, each piece arrives any transmission channel and when being not only corresponding transmission channels, from the SIR of corresponding transmission channels _RefJust upgraded.Therefore, for SIR _RefDetermine that increase the BLR of each transmission channel effectively, this has improved convergence time, as mentioned above.

Explanation is used for a kind of method of power controlling among Figure 10 according to the embodiment of Fig. 6 A.Determine the public BLER (920) of the data block that receives on a plurality of transmission channels.Also determine the public target BLER (925) of a plurality of transmission channels.Determine reference sir value (930) based on this public BLER and target BLER corresponding to a plurality of transmission channels.

With reference to figure 7, another embodiment of mass measurement/control logic 790 is shown.The quality control of first and second transmission channels 401,402 is logically respectively by

frame

700 and 710 expressions.Mass measurement/control logic 790 is handled the CRC information of corresponding transmission channels.In addition, the quantity of the piece that receives during one or more previous TTI based on respective channel is estimated the BLR of 702,712 each channel.For example when receiving CRC information, can add up these pieces with each piece.At definite SIR _Ref701,711 o'clock, adjust the BLER controller based on the estimation BLR of each corresponding transmission channels.The corresponding SIR that compares 720 each transmission channel then _Ref701,711 determine the maximum SIR that uses in inner loop power control _Ref

In case the BLR of known estimation then uses multiple technologies, adjusts the corresponding SIR that is used for determining each transmission channel based on the BLR that estimates _Ref701,711 BLER.Can revise parameter in mass measurement/control logic 790 according to the BLR that estimates, the adverse effect that restrains during to low BLR with compensation.For example, can according to formula (6) and (7), based on the BLR that estimates with filter time constant α and gain K parameter modification (being α ' and K ').As mentioned above, filter time constant α is based on BLER _RefBe provided with, so that the background block error of equal number is used for determining that BLER estimates.Here, come modification time constant and gain, to keep the identical filter time constant and the SIR of each channel according to BLR _RefIdentical rate of change (that is convergence time) and BLR irrelevant.That is, convergence time will be identical when hanging down BLR.

α′＝α ^1/BLR (6)

K′＝K/BLR (7)

Perhaps, can also be by clocklike upgrading SIR at interval _Ref, as upgrading, so that time constant and piece speed are irrelevant with each frame that receives piece on the corresponding transmission channels.When not receiving piece on the channel, the piece CRC that substitution is correct (substituting no CRC).When incorrect arrives, with the inverse weight CRC of the piece speed estimated, as shown in Equation (7).Equally, convergence time will be identical when hanging down BLR.

In another alternative that the BLR that estimates in using Fig. 7 arranges, can get rid of and have the low SIR that excites the transmission channel of (excitation) _RefTherefore, higherly excite and be used for determining SIR than the transmission channel of rapid convergence so that have _RefA kind of the measuring that excites is the per second BLER (block error rate), and promptly (it can be approximated to be BLER to the product of BLR and BLER _Ref).Mass measurement/control logic 790 is determined at definite maximum SIR based on the estimation BLR of each transmission channel _RefThe time whether should comprise corresponding SIR _Ref701,711.The BLR decision-making value BLR of each channel is set according to formula (8) _Thresh, so that the minimum that must meet the demands excites level X.

BLR _thresh＝X/BLER _ref (8)

At definite total SIR _RefThe time do not comprise having the BLR of being lower than _ThreshThe transmission channel of BLR.For the possibility that prevents from all transmission channels are got rid of, can satisfy BLR up to transmission channel with total SIR with reference to remaining unchanged _ThreshTill.Moreover, if but the accumulated quantity of the background block error on all channels is high unusually not to have channel to satisfy BLR _Thresh, can increase the SIR reference.

Relevant eliminating is from having the BLR of being lower than _ThreshAnother problem of SIR reference of channel of BLR be total SIR _RefCan between different SIR references, jump.Can use hysteresis (hysteresis) to reduce the number of times of jump.Increase BLR estimator time constant and also can have level and smooth effect.Note using and to close standard (standard is opened in replacement) and have the advantage that starts SIR control immediately, is important under the remote situation of the value that this point is fit at initial SIR reference distance.

Explanation is used for a kind of method of power controlling among Figure 11 according to the embodiment of Fig. 7.Determine the BLER (940) of the data block that receives on the transmission channel.Estimate the BLR (945) of the data block that receives on this transmission channel.Determine reference sir value (950) based on the BLR of this BLER, target BLER and estimation corresponding to this transmission channel.

With reference to figure 8, another embodiment of mass measurement/control logic 890 is shown.Here, when initialization, determine apace more accurately, more approaching initial SIR is with reference to SIR _Init, this for all channels provide faster to correct SIR _RefInitial convergence.By the total SIR of oblique deascension (ramp down) _RefDetermine SIR _{Init '}Up on any transmission channel background block error takes place till.Initialization block 830 monitors the CRC of various channels, and in case from any Channel Detection to first background block error, then determine SIR _InitFor the pairing SIR of this mistake takes place.With this SIR _InitValue provides as the initial SIR of all quality controls 800,810 of all channels.Perhaps, initialization block 830 is not to first background block error operation, but can wait for the background block error of certain fixed qty.

In case determined initial SIR, any technology in above-mentioned (or other) Quality Control Technology then implemented is determined the SIR of each channel _Ref801,811 and the maximum 820SIR that in inner loop power control, uses _Ref

Explanation is used for a kind of method of power controlling among Figure 12 according to the embodiment of Fig. 8.Adjust with reference to sir value (960) in the downward mode of increment type (downward incrementally).Monitor and whether background block error (965) is arranged with this transmission channel that is associated with reference to SIR.When accumulative total on these transmission channels when receiving the mistake (970) of predetermined quantity, the initial reference sir value of each transmission channel in these transmission channels is made as the reference sir value of adjusting in the increment type mode (975).Otherwise, adjust another increment of sir value downwards, and continue to monitor.

The foregoing description describe to use CRC information to measure mistake in the reception data on the different transmission channels.But those skilled in the art will recognize that and to adopt other mistake measurement standards, as average iterations in bit error rate (BER) (BER), the turbo decoder and useful signal noise ratio (SNR).

Moreover, though mode the foregoing description can relate to downlink power control application by way of example, those skilled in the art will recognize that and can also use these method and apparatus equivalently in uplink power control, to use.

In addition, though mainly be irrespectively to describe more above-mentioned embodiment each other, it is mutually exclusive to should be appreciated that described technology does not mean that.That is, can use described these technology in the mode of various combinations.

Should be emphasized that, term " comprises " when using in this explanation and claims, be used to specify the existence of feature, step or the assembly stated, but the existence or the interpolation of one or more other features, step, assembly or their set are not repelled in the use of these terms.

Those skilled in the art will recognize that the present invention can implement with various specific forms under the prerequisite that does not deviate from its substantive characteristics.In all respects, the disclosed embodiments all are considered to be illustrative but not determinate.Scope of the present invention by appending claims but not above stated specification indicate, and be intended to contain all changes in the implication that belongs to its equivalent and the scope thus.

Claims

1. method that is used for the communication system power controlling comprises:

Data block based on the data block that receives on first transmission channel and at least the second transmission channel is determined BLER (block error rate) (BLER); And

Determine that based on the target BLER of described BLER and described first transmission channel reference signal-to-interference corresponding to described first transmission channel is than (SIR) value.

2. the method for claim 1 wherein when not receiving data block on described first transmission channel, only considers that the data block of described at least second transmission channel is determined described BLER.

3. the method for claim 1 is wherein come the error rate information weighting corresponding to the data block of described the second transmission channel according among chnnel coding, code check, rate-matched and the current SIR of described first and second transmission channels at least one at least.

4. the method for claim 1 is wherein determined described BLER according to Cyclic Redundancy Check information.

5. the method for claim 1, wherein adjust described with reference to SIR so that described BLER approaches described target BLER.

6. the method for claim 1 also comprises:

With described with reference to sir value and at least one corresponding to another transmission channel other with reference to sir value relatively; And

One of maximum is used for power controlling in the reference sir value of selecting to be compared.

7. equipment that is used for the communication system power controlling comprises the logic of carrying out following steps:

Data block based on the data block that receives on first transmission channel and at least the second transmission channel is determined BLER; And

Determine sir value based on the target BLER of described BLER and described first transmission channel corresponding to described first transmission channel.

8. equipment as claimed in claim 7 comprises the logic of carrying out following steps:

When not receiving data block on described first transmission channel, when determining described BLER, only consider the data block of described at least second transmission channel.

9. equipment as claimed in claim 7 comprises the logic of carrying out following steps:

Come to give weighted value according among chnnel coding, code check, rate-matched and the current SIR of described first and second transmission channels at least one to error rate information corresponding to the data block of described at least the second transmission channel.

10. equipment as claimed in claim 7 comprises the logic of carrying out following steps:

Determine described BLER according to CRC information.

11. equipment as claimed in claim 7 comprises the logic of carrying out following steps:

Adjust described with reference to SIR so that described BLER approaches described target BLER.

12. equipment as claimed in claim 7 also comprises the logic of carrying out following steps:

13. a method that is used for the communication system power controlling comprises:

Determine the public BLER of the data block that receives on a plurality of transmission channels;

Determine the public target BLER of described a plurality of transmission channels; And

Determine reference sir value based on described public BLER and described target BLER, describedly be used for power controlling with reference to SIR corresponding to described a plurality of transmission channels.

14. an equipment that is used for the communication system power controlling comprises the logic of carrying out following steps:

15. a method that is used for the communication system power controlling comprises:

Determine the BLER of the data block that receives on the transmission channel;

Estimate the piece speed (BLR) of the data block that receives on the described transmission channel; And

Determine reference sir value based on described BLER, target BLER and estimated BLR, describedly be considered for power controlling with reference to SIR corresponding to described transmission channel.

16. method as claimed in claim 15, wherein estimated BLR is used for keeping determined constant variation rate with reference to sir value for the BLR that difference is estimated.

17. method as claimed in claim 15 is wherein determined described BLER according to CRC information.

18. method as claimed in claim 15, wherein adjust described with reference to SIR so that described BLER approaches described target BLER.

19. method as claimed in claim 15 if wherein estimated BLR excites level corresponding to lowest channel at least, is then only considered describedly to come power controlling with reference to SIR.

20. method as claimed in claim 19 wherein determines that based on the product of estimated BLR and described target BLER described channel excites level.

21. method as claimed in claim 15 also comprises:

22. an equipment that is used for the communication system power controlling comprises the logic of carrying out following steps:

Determine the BLER of the data block that receives on the transmission channel;

Estimate the BLR of the data block that receives on the described transmission channel; And

23. equipment as claimed in claim 22 comprises the logic of carrying out following steps:

Use estimated BLR to keep determined constant variation rate with reference to sir value with the BLR that estimates for difference.

24. equipment as claimed in claim 22 comprises the logic of carrying out following steps:

Determine described BLER according to CRC information.

25. equipment as claimed in claim 22 comprises the logic of carrying out following steps:

26. equipment as claimed in claim 22 comprises the logic of carrying out following steps:

If estimated BLR excites level corresponding to lowest channel at least, then only consider describedly to come power controlling with reference to SIR.

27. equipment as claimed in claim 26 comprises the logic of carrying out following steps:

Determine that based on the product of estimated BLR and described target BLER described channel excites level.

28. equipment as claimed in claim 22 also comprises the logic of carrying out following steps:

29. a method that is used for the communication system power controlling comprises:

Adjust with reference to sir value in the downward mode of increment type;

Monitor whether at least one has background block error with the described transmission channel that is associated with reference to SIR; And

When accumulative total on any transmission channel in described at least one transmission channel when receiving the mistake of predetermined quantity, the initial reference sir value of each transmission channel in described at least one transmission channel is made as the described reference sir value of adjusting in the increment type mode.

30. an equipment that is used for the communication system power controlling comprises the logic of carrying out following steps:

Adjust with reference to sir value in the downward mode of increment type;