CN101292457A - Method and apparatus for reliable signaling in wireless communication - Google Patents

Abstract

Techniques for improving reliability of signaling are described. A transmitter determines if improved reliability is applicable for signaling for a data frame. The transmitter sends the signaling without improved reliability if deemed not applicable and with improved reliability if deemed applicable. A receiver receives the signaling and declares the signaling as reliable or unreliable based on the received signal quality of the received frame and a threshold. The receiver recovers the signaling if deemed reliable and decodes the received frame in accordance with the recovered signaling. The receiver declares the received frame as a null frame or performs some other action if the signaling is deemed unreliable.

Description

The method and apparatus that is used for reliable signaling in the radio communication

Advocate priority 119 times at 35 U.S.C. §

Present application for patent is advocated the 60/711st of being entitled as of application on August 26th, 2005 " METHOD AND APPARATUS FORRELIABLE SIGNALING IN WIRELESS COMMUNICATIONS ", the priority of No. 987 provisional application cases, described provisional application case transfers the assignee of present application for patent, and specially is incorporated herein by reference.

Technical field

The present invention relates generally to communication, and more particularly, relates to the technology of the reliable signaling that is used for radio communication.

Background technology

In communication system, but the reflector receiving data frames is to be used to be transferred to receiver.Described reflector can be handled (for example, coding, alternation sum modulation), and each Frame is with the generation data symbol, and available described data symbol carries out multiplexed to signaling.But the data rate and/or the out of Memory of described signaling designation data frame.Then, it is described through multiplexed data symbol and signaling that reflector is handled, producing modulated signal, and via this signal of traffic channel.

Receiver receives the signal transmitted, and handles the described signal that receives and estimate to obtain data symbol, and described data symbol estimates it is the estimation of the data symbol that sends of reflector.Receiver also can recover the signaling of each Frame, and then estimates that according to the described data symbol of the signaling process of being recovered (for example, demodulation, release of an interleave and decoding) it is the estimation of the Frame that reflector sent to obtain the frame through decoding.

Receiver may need correctly to recover signaling, so that deal with data sign estimation and obtain frame through being correctly decoded suitably.Therefore, need to be used to realize the technology of reliable signaling in this technology.

Summary of the invention

According to one embodiment of present invention, a kind of equipment comprises: at least one processor, it comprises the frame of encoded data and signaling in order to reception, in order to determine the received signal quality of the described frame that receives, in order to determine based on described received signal quality whether described signaling is reliable, if and be considered to reliably in order to described signaling, recover described signaling so and according to described through the signaling of the recovering described encoded data of decoding; And memory, it is coupled to described at least one processor.

Another embodiment comprises a kind of method, and described method comprises: receive the frame that comprises encoded data and signaling; Determine the received signal quality of the described frame that receives; Determine based on described received signal quality whether described signaling is reliable; And if described signaling is considered to reliably recover described signaling so, and according to described through the signaling of the recovering described encoded data of decoding.

Another embodiment comprises a kind of equipment, and described equipment comprises: the device that is used to receive the frame that comprises encoded data and signaling; The device that is used for the received signal quality of definite described frame that receives; Be used for determining whether reliably device of described signaling based on described received signal quality; If be used for the device that described signaling is considered to reliably recover so described signaling; And if be used for described signaling be considered to reliable so according to described through the decode device of described encoded data of the signaling of recovering.

Another embodiment comprises a kind of processor readable media that is used for store instruction, and described instruction can be operated the frame that comprises encoded data and signaling with reception; Determine the received signal quality of the described frame that receives; Determine based on described received signal quality whether described signal is reliable; And if described signaling is considered to reliably recover described signaling so, and according to described through the signaling of the recovering described encoded data of decoding.

Another embodiment comprises a kind of method, and described method comprises: the signaling of determining whether to be applicable to through improved reliability Frame; If think inapplicable, send the signaling that does not have through improved reliability so; And if thought suitable, the signaling that has through improved reliability would be sent so.

Another embodiment comprises a kind of equipment, and described equipment comprises the device that is used for determining whether to be applicable to through improved reliability the signaling of Frame; If be used for thinking the inapplicable device that does not have through the signaling of improved reliability that sends so; And if be used for thinking that suitable transmission so has the device through the signaling of improved reliability.

Various aspects of the present invention and embodiment are hereinafter described in more detail.

Description of drawings

Fig. 1 shows multi-address communication system.

Fig. 2 shows three layers of frame structure among the UTRA TDD LCR.

Fig. 3 shows the burst format among the UTRA TDD LCR.

Fig. 4 shows that reflector is to the processing of Frame among the UTRA TDD LCR.

Fig. 5 A, Fig. 5 B and Fig. 5 C show that respectively the TFCI code word is in the transmission of not having under the situation that repeats, has 2 repetitions and have 4 repetitions.

Fig. 6 shows that reflector sends the process of signaling.

Fig. 7 shows the relation between target SINR, SINR side-play amount and the SINR threshold value.

Fig. 8 shows power control mechanism.

Fig. 9 shows the TFCI reliability detector.

Figure 10 shows the process of receiver deal with data.

Figure 11 shows the block diagram of base station and terminal.

Embodiment

Word " exemplary " is used for expression " as example, example or explanation " in this article.Any embodiment that this paper is described as " exemplary " needn't be interpreted as more preferred or favourable than other embodiment.

Fig. 1 shows the multi-address communication system 100 with a plurality of base stations 110 and a plurality of terminal 120.The base station normally with the fixed station of terminal communication, and also can be called as Node B, access point or a certain other term.Each base station 110 covers for the specific geographical area provides communication.System controller 130 is coupled to base station 110, and coordination and control to these base stations are provided.

Terminal can be static or move, and also can be called as subscriber equipment, travelling carriage or a certain other term.Terminal any given time can with zero, one or more base station communication.Terminal can be cellular phone, PDA(Personal Digital Assistant), subscriber unit, radio modem, wireless device or the like.In the following description, term " terminal " and " user " are used interchangeably.

Technology described herein can be used for various wireless communication systems, for example code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system and quadrature FDMA (OFDMA) system.But cdma system embodiment such as cdma2000, general land wireless access (Universal Terrestrial Radio Access, UTRA) radiotechnics of time division duplex (TDD) or UTRA Frequency Division Duplexing (FDD) (FDD).Cdma2000 is contained IS-2000, IS-95 and IS-856 standard.UTRA TDD comprises 1.28,3.84 and the 7.68Mcps option.UTRA TDD 3.84 and 7.68Mcps option also are called as Time Division-Code Division Multiple Access (TD-CDMA) or high spreading rate (HCR).UTRA TDD1.28Mcps option also is called as time-division synchronization CDMA (TD-SCDMA) or low spreading rate (LCR).UTRA FDD also is called as wideband CDMA (W-CDMA).But the radiotechnics of tdma system embodiment such as global system for mobile communications (GSM).In document, UTRATDD, UTRA FDD and GSM are described from " third generation partner program " tissue (3GPP) by name.In document, cdma2000 is described from " third generation partner program 2 " tissue (3GPP2) by name.These various radiotechnicss and standard are known in this technology.For purpose clearly, hereinafter described technology is described at UTRA TDD LCR.

Fig. 2 shows three layers of frame structure 200 among the UTRA TDD LCR.The transmission time line is divided into a plurality of frames, and wherein each frame is discerned by System Frame Number (SFN).Each frame has the duration of 10 milliseconds (ms), and is divided into two subframes 1 and 2.Each subframe has the duration of 5ms, and is divided into 0 to 6, down link pilot timeslot of seven time slots (DwPTS), a uplink pilot time slot (UpPTS) and a protection period (GP).Time slot 0 is used for down link, and time slot 1 is used for up link, and time slot 2 to 6 can be used for down link and/or up link, as being determined by switching point.

But one or more users are given in each time slot assignment.Transmission at the user in the time slot is called as burst.Burst can deliver business datum, control data, transport-format combination indicator (Transport Format Combination indicator, TFCI), through-put power control (TPC), synchronous shift (SS) or its combination.The data rate of TFCI designation data frame.This data rate and various parameter (for example, frame sign, code check, modulation scheme etc.) are associated.TPC information is used for transmission power adjustment.SS information is used for sequential regulates, and makes that going up the mode of aiming at from the burst of different terminals with the time arrives the base station.The various burst format of definition among the UTRA TDD.

Fig. 3 shows the burst format 300 at the situation of burst delivery TFCI, TPC and SS information.Burst format 300 can be used for down link and up link.Burst format 300 contains two bursts that will send in two time slots, a time slot is in subframe 1, and another time slot is in subframe 2.Each burst all comprises first data field, mid-code field (midamble field), second data field and protection period (GP).Four fields of each burst have length shown in Figure 3 (in chip).

The data symbol of a Frame of four data field delivery of described two bursts.The TFCI code word is divided into four parts, and it is mapped to four data fields of position shown in Figure 3.Also can video second data field of each burst of position shown in Figure 3 of SS symbol and TPC symbol.

In UTRA TDD, data symbol in the time slot and TFCI symbol are expanded with same walsh code.This walsh code has flare factor SF, and it can be 1,2,4,8 or 16.Described flare factor is determined the number of times that given symbol is replicated and sends in the described time slot.Therefore, flare factor is a factor determining the reliability of symbol.Because the number of the chip in the time slot is fixed, so the number of the definite symbol that can in described time slot, send of flare factor.Specifically, a time slot can deliver 704/SF symbol in two data fields of described time slot.

In UTRA TDD, in down link and the up link each, terminal can be assigned Dedicated Traffic Channel (DTCH) and Dedicated Control Channel (DCCH).DTCH delivers business datum, for example is used for voice, grouped data etc.Can send a Frame in each Transmission Time Interval (TTI) on DTCH, described Transmission Time Interval can be 20ms or a certain other duration.Frame also can be called as grouping, data code word, data block etc.DCCH delivers signaling.Each 40ms can send a control frame in the time interval on DCCH.

Fig. 4 shows that reflector is to the processing of Frame among the UTRA TDD LCR.Reflector to Frame carry out that Cyclic Redundancy Check is additional, convolutional encoding, the segmentation of alternation sum radio frame, to produce two code blocks.CRC is used for error detection by receiver.Then, reflector is carried out each code block and is deleted surplus (puncturing) and rate-matched, with obtain to have a required number sign indicating number through deleting the complementary piece.Reflector make each through delete complementary piece and DCCH piece multiplexed, make every group code piece and DCCH piece staggered producing through staggered piece, and TFCI, TPC and SS information are appended to each through staggered piece.Then, reflector is carried out the time slot segmentation, and produces four bursts at Frame.

Reflector can different pieces of information speed receive business datum, to be used to be transferred to receiver.For instance, reflector can have audio call, and the data rate in the scope that can from 12.2 to 4.75 kilobit per seconds (kbps) receives the speech frame that is produced by adaptive multi-rate (AMR) voice codec (speech codec).Reflector also can and receive silence descriptor (SID) frame during the invalid frame cycle quiet (for example, suspending).Reflector can be handled each Frame by suitable code check, is used for the sign indicating number position of the suitable number transmitted at four time slots with generation.Reflector can use different code checks at the Frame of different pieces of information speed.

In Fig. 4, no matter whether send DCCH, and no matter whether send TFCI, TPC and SS, the number of the position in each piece all depends on the data rate of Frame.Fig. 4 is illustrated in the number that data rate is 12.2k and DCCH, TFCI, TPC and the SS position in each piece under the situation that Frame sends.If do not send DCCH, TFCI, TPC and/or SS, the number of each position in deleting the complementary piece increases corresponding bits number so, because the number of the position in each burst is fixed.Code check is determined by the number of the position in the Frame and the number of two positions in deleting the complementary piece.

The required specific minimum received signal quality of each code check and the performance that realizes goal gradient is associated.Received signal quality can be by signal to interference plus noise than (signal-to-interference-plus-noise ratio, SINR), signal to noise ratio (snr), every symbol energy and overall noise than (energy-per-symbol-to-total-noise ratio, Es/Nt) or a certain other measured value quantize.For the sake of clarity, in the major part of Miao Shuing, use SINR hereinafter at received signal quality.The performance of goal gradient can (for example, 1%FER) be quantized by particular frame error rate (FER).Can be at using different transmit power level with different code check coded data frames.For instance, when sending DCCH, can transmit the SID frame than the power of 12k frame little 4.5 decibels (dB), and can transmit invalid frame, to obtain same target FER than the power of the little 6.4dB of 12k frame.Can transmit 12k, SID and invalid frame than the 12k with DCCH, SID and the low power of invalid frame with DCCH.

Can in each encoded composite transport channel (CCTrCH), send TFCI index or value, be used for the form of described CCTrCH with indication.CCTrCH is data multiplexed of all transfer channels that are assigned in the Transmission Time Interval (TTI), and described Transmission Time Interval can be 20ms at voice.The transmission of TFCI is disposed by higher level.Each institute's distributed time slot also comprises the higher level signaling and whether delivers TFCI to indicate described time slot.TFCI is present in first time slot of radio frame of each CCTrCH.

The TFCI index can comprise 1 to 10 information bit (or TFCI position), and described information bit is encoded to produce the TFCI code word.Come the TFCI index is encoded with the different modes of deciding on the number and the selected modulation scheme of TFCI position.Table 1 general introduction is at the coding of the TFCI index that is used for QPSK and 8-PSK of the TFCI position of different numbers.The coding of TFCI is described in the 3GPP TS 25.222 that discloses available being entitled as " Multiplexing and channel coding (TDD) " (in March, 2006, the 7th edition).Available 2,4,8 or 16 TFCI symbols send the TFCI code word.The TFCI symbol with the expansion of same walsh code with as data symbol.

Table 1

In UTRA TDD, all symbols of a time slot are all with same power grade transmission.The encoding scheme of TFCI is strong not as the convolution code that is used for data division.Therefore, when when being set to lower grade, describedly may be not enough to the TFCI code word of decoding reliably than low transmission power than low-rate data frame through-put power.May cause the reliability of TFCI less than the low transmission power grade.Computer simulations is with the FER of TFCI under the situation of determining not have DCCH, and described situation has the lower-wattage grade at SID and invalid frame.For additive white Gaussian noise (Additive WhiteGaussian Noise, AWGN) the 4X duplicated code in the channel (it is used for 1 or 2 TFCI positions with QPSK), FER is about 0.5% for the 12k frame, is about 12% and be about 27% for invalid frame for the SID frame.For (16,5) bi-orthogonal codes and (32,20) Reed-bridle (Reed Muller) sign indicating number, FER even higher.The high TFCI FER of SID and invalid frame will influence data performance unfriendly.

Reliability that can modified in various ways TFCI.Some embodiment of the reliability of improving TFCI are hereinafter described.

Fig. 5 A shows the transmission of the TFCI code word that does not have repetition.Can in four time slots of four subframes of TTI, send Frame.The TFCI code word is divided into four parts, and these parts are mapped to initial two time slots.Latter two time slot does not comprise any TFCI information.

Fig. 5 B shows the transmission with the TFCI code word that repeats for 2 times.In an embodiment, the TFCI code word repeats twice, sends first copy of TFCI code word in initial two time slots, and in the end sends second copy of TFCI code word in two time slots.In another embodiment (among Fig. 5 B show), in initial two time slots, send half of TFCI code word, and in the end send the TFCI code word second half in two time slots.On four time slots, send the TFCI code word more time diversity can be provided.

In another embodiment, in initial two time slots, send first and second copies of TFCI code word.Use first walsh code to send first copy of TFCI code word, and use second walsh code to send second copy of TFCI code word.This embodiment allows the receiver TFCI code word of decoding quickly.

Fig. 5 C shows the transmission with the TFCI code word that repeats for 4 times.In an embodiment, the TFCI code word repeats four times, uses two walsh codes to send first and second copies of TFCI code word in initial two time slots, and uses two walsh codes in the end third and fourth of transmission TFCI code word to copy in two time slots.

In another embodiment, the TFCI code word sends for receiving reliably with the through-put power of abundance.Depend on the data rate in the given time slot, the through-put power that is used for the TFCI symbol can be equal to or higher than the through-put power that is used for data symbol.

Can show the improvement that at every turn doubles all to cause the about 3dB of TFCI of TFCI duplication factor.For instance, in awgn channel, realize that with bi-orthogonal codes the 1%FER of TFCI may need the SINR of about 1.3dB.Can make for twice required SINR reduce to pact-1.7dB by sending the TFCI code word, and can make it reduce to pact-4.7dB four times by sending the TFCI code word.

In an embodiment, have only when needed just transmission to have code word through the TFCI of improved reliability.Can determine power offset at the data rate of all supports.Can be based on the power offset of some data rate, use through improved reliability (for example, repeating for 2 times or 4 times) at the TFCI of described data rate.For instance, can only be applied to have the invalid frame of maximum power side-play amount and minimum transmit power level through improved reliability.Also can be applicable to the frame of SID frame and/or other data rate through improved reliability.In another embodiment, be applied to the TFCI of the data rate of all supports through improved reliability.

Fig. 6 displaying is used to send signaling (for example, the embodiment of process 600 TFCI).Receiving data frames to be being used for transmission, and determines the data rate (frame 612) of described Frame.Then determine whether to be applicable to the signaling (for example, TFCI code word) (frame 614) of described Frame through improved reliability.For instance, if the data rate of described Frame is lower than a certain speed, applicable through improved reliability so.If be suitable for (determining in as frame 616), so to send signaling (frame 618) through improved reliability through improved reliability.This may need a plurality of copies of duplicating described signaling and sending described signaling.If inapplicable, send signaling (frame 620) with normal mode so through improved reliability.

Receiver obtains all copies at the TFCI code word of Frame transmission.Receiver all TFCI copies capable of being combined are to obtain the TFCI through combination of described Frame.In one embodiment, receiver is carried out simple average, and by on the symbolic base TFCI copy being sued for peace.In another embodiment, receiver is carried out max ratio combined (MRC), and the SINR that receives that copies based on each TFCI is weighted the symbol that described TFCI copies, and by symbol ground the symbol through weighting of all TFCI copies is sued for peace.MRC has the big flexible strategy of TFCI copy of the higher SINR that receives, and this can improve the quality through the TFCI of combination.

When data (for example) because the variation of speech activity and when sending with the variable transmit power grade, above-described embodiment improves the reliability of TFCI during the audio call.Computer simulation indication is duplicated the TFCI code word and can be made for four times TFCI FER reduce to about 1%, or better concerning the most of channel models that are used for SID and higher rate frame.Yet, if in invalid frame, send, even so the TFCI code word is duplicated the reliability that can not realize that the TFCI code word is required four times with low-down power grade transmission.For invalid frame and other frame, can use technology described below to improve the TFCI performance.

In one embodiment, determine the reliability of TFCI based on the SINR that receives of Frame.Can in a plurality of time slots, send Frame.Can (for example) assign to determine the SINR that receives at described time slot based on the midamble in each time slot and/or data portion.The SINR that receives of all time slots capable of being combined is to obtain the SINR that receives of Frame.In one embodiment, can the SINR that receive of all time slots be averaged, to obtain the SINR that receives of Frame.In another embodiment, for 2 times (or 4 times) repetition of TFCI, the SINR that receives of Frame is set to than the high 3dB of the minimum SINR that receives (or 6dB) in all time slots.

The probability of TFCI code word can think so that less than the target FER of TFCI the TFCI code word that receives is reliable if decode mistakenly.If the TFCI code word that receives is confirmed as reliably, can normal mode be decoded by the TFCI code word that receives so.If it is unreliable that the TFCI code word that receives is confirmed as, can carry out other action, for example blind decoding so.Under the situation of blind decoding, the frame decoding that receiver can be received based on the different pieces of information rate hypothesis is till described frame is correctly decoded.

In an embodiment, compare the reliability of determining the TFCI code word that receives by receive SINR and SINR threshold value with Frame, as follows:

Equation (1)

In equation (1), if the SINR that receives surpasses the SINR threshold value, the TFCI code word that receives so is considered to reliably, and otherwise is considered to unreliable.If can select the SINR threshold value so that the TFCI code word that receives is considered to reliably, the probability of the TFCI code word of decoding so mistakenly is less than the target FER of TFCI.Can determine the SINR threshold value in a number of ways.

In one embodiment, based target SINR and SINR side-play amount are determined the SINR threshold value.Can regulate target SINR by power control circuit, to realize the performance of required grade, for example, the 1%FER of Frame.The through-put power of reflector scalable Frame makes the SINR receive reach or near target SINR, such as hereinafter description.Can determine the SINR side-play amount based on the frame that receives.

Fig. 7 shows the relation between SINR threshold value, target SINR and the SINR side-play amount.Curve 710 is showed the SINR that receives of probability density function (PDF) and invalid frame.Curve 712 is showed the SINR that receives of PDF and SID frame.Although do not show among Fig. 7 that the SINR that receives of PDF and higher rate Frame is right-hand curve 712.

The target SINR of vertical line 714 indication SID frames.The through-put power of reflector scalable SID frame is so that the SINR that receives of half SID frame is lower than target SINR, and the SINR that receives of residue SID frame is higher than target SINR.Can use different target SINR at different pieces of information speed.These targets SINR can be separated by the coding gain of realizing at different pieces of information speed.

In the embodiment shown in fig. 7, vertical line 716 indication SINR threshold values, and between at the center of the PDF of SID frame and the center at the PDF of invalid frame.If the SINR that receives surpasses the SINR threshold value, the TFCI code word that receives so can be considered to reliable.This reliable TFCI code word can be used for SID frame, higher rate Frame or even invalid frame.If the SINR that receives is lower than the SINR threshold value, the TFCI code word that receives so can be considered to insecure.This insecure TFCI code word can be considered to be used for invalid frame.In this embodiment, determine whether the given TFCI code word that receives is equal to reliably whether definite given frame that receives is invalid frame.

Can define the SINR threshold value to realize the target FER of TFCI.This target FER is determined by the following: the FER of the TFCI code word that (1) is considered to receive reliably, it also is called as conditionity FER, (2) SID is to invalid probability, and it is the percentage that the SINR that receives is lower than the SINR threshold value and is considered to the SID frame of invalid frame.Described SID to invalid probability by below curve 712 and online 716 left sides be decorated with cornerwise regional 718 the indication.Can realize the target FER of TFCI in order to ensure long-term FER, can define the SINR threshold value so that conditionity FER and SID each all is lower than the target FER of TFCI to invalid probability.

In the embodiment shown in fig. 7, the SINR side-play amount is the target SINR of SID frame and the difference between the SINR threshold value.Can determine the SINR side-play amount in a number of ways.

In being called as first embodiment of fixing SINR side-play amount, determine the SINR side-play amount based on the variable quantity of the SINR that receives of SID frame.If the PDF of SID frame is known distribution (for example, Gaussian Profile), so can based on the SINR variable quantity determine cumulative distribution function (CDF) and target SID to invalid probability equate point.The SINR side-play amount can be as giving a definition:

SINR side-play amount=K * σ _SID, equation (2)

σ wherein _SID ²Be the SINR variable quantity of SID frame, and

K is to the determined scale factor of invalid probability (scaling factor) by target SID.

If the probability of SID frame is 7%, and target SID is 1% to invalid probability, for the Gaussian Profile of the SINR that receives, can be set to-1.4 by K so.

In an embodiment, the SINR that receives based on the SID frame determines SID SINR variable quantity σ _SID ²Can after the TFCI code word that decoding receives, discern the SID frame.The SINR that receives of these SID frames can be in order to derive the SINR variable quantity.In another embodiment, the SINR that receives based on invalid frame determines SID SINR variable quantity.By computer simulation, the SINR variable quantity of observing invalid frame is similar to the SINR variable quantity of SID frame.Compare with the SID frame, invalid frame can send more continually, and for example, audio call can send about 60% invalid frame and about 7% SID frame.Therefore, more SINR measured values can be used for invalid frame, and can be in order to derive the estimation more accurately of SINR variable quantity.Can derive the both sides of SINR variable quantity based on the SINR that receives of all error free invalid frames estimates.Perhaps, a side (left side) that can derive the SINR variable quantity based on the SINR that receives less than the average SINR of invalid frame is estimated.A described side estimates to have avoided the right side that may be subjected to error effect at invalid PDF to use the SINR that receives.In another embodiment, can determine the SINR variable quantity, and the SINR variable quantity is averaged to obtain the SINR variable quantity of SID frame at different pieces of information speed.Usually, can determine SID SINR variable quantity based on SID and/or other frame.

In second embodiment that is called as self adaptation SINR side-play amount, invalid probability is determined the SINR side-play amount based on the SID that measures.In this embodiment, at first unreliable frame is identified as the frame that receives that is regarded as invalid frame, because its SINR that receives is lower than the SINR threshold value.Unreliable frame is decoded, whether be actually invalid frame to determine them.Count to determine that by the number (K) that is not decoded as the unreliable frame of invalid frame in the window to L unreliable frame SID is to invalid probability (P _SN), or P _SN=K/L, wherein L can be 200 or a certain other value.If P _SNSurpass high value P _H, the SINR side-play amount can increase OS so _UPStep-length, for example, P _H=0.02, and OS _UP=0.5dB.High P _SNMay be owing to too many SID frame causes because low SINR side-play amount is declared as invalid frame.Make the SINR side-play amount increase OS _UPSo will reduce this type of error event.On the contrary, if P _SNDrop to low value P _LBelow, the SINR side-play amount can reduce OS so _DNStep-length, for example, P _L=0.005, and OS _DN=0.5dB.Low P _SNMay because being declared as invalid frame, big SINR side-play amount cause owing to minority SID frame.Make the SINR side-play amount reduce OS _DNSo will impel more SID frame to be declared as invalid frame.Also can be at P _L, P _H, OS _UPAnd OS _DNUse other value.After each adjusting SINR side-play amount, in the applications wait cycle (for example, having 250 unreliable frames), during described latent period, the SINR side-play amount does not change.This wait cycle can prevent the switching back and forth of SINR side-play amount.

The SINR side-play amount can be limited in the preset range, to prevent to overregulate and the less stress joint.Described preset range can be determined by computer simulation, experience measurement etc., and be decided by channel model.Described preset range can be from-4dB to-8dB, or is a certain other scope.

Second embodiment can be used for various channel models, and can be suitable for the different channels condition.Second embodiment does not need the estimation of SINR variable quantity, and can be at the SINR variable quantity unavailable or noise use when too many.Second embodiment can be in order to regulating SINR side-play amount (as described above), or in order to directly to regulate the SINR threshold value.

For two embodiment, the SINR threshold value can followingly be provided with:

SINR threshold value=target SINR-SINR side-play amount equation (3)

Target SINR is regulated to realize the target FER of Frame by power control circuit.SINR regulates through-put power owing to based target, and therefore the distribution of the SINR that receives also changes with target SINR.Owing to regulate the SINR threshold value together with target SINR, so the FER of TFCI is with the target FER of tracking data frame.

To determine the first embodiment computer simulations of SINR side-play amount based on the SINR variable quantity.The computer simulation indication is for various channel models, and the FER of TFCI can reduce in fact, for example, for some channel models, is reduced to less than 1% from about 20%.

Fig. 8 shows the power control mechanism 800 of the through-put power of the transfer of data of adjusting from the reflector to the receiver.Power control mechanism 800 comprises inner looping 802 and external loop 804.

Inner looping 802 attempts to make the SINR that receives at transfer of data to keep as much as possible near target SINR.In each institute's distributed time slot, the SINR that receives of SINR estimator 812 data estimators transmission, and the SINR that receives is provided to TPC generator 814.TPC generator 814 SINR and the target SINR that receives compared, and the result produces the TPC symbol based on the comparison also from regulon 820 receiving target SINR.Described TPC symbol sends to reflector via link 830.Reflector is handled the feedback transmission from receiver, and the TPC symbol that acquisition receives in each institute's distributed time slot.TPC detector 832 detects each TPC symbol that receives, and TPC is provided decision-making, and described decision-making indication detects still (Down) order downwards of upwards (Up) order.Then, transmitter unit 834 is regulated the through-put power of transfer of data based on described TPC decision-making.

Because path loss and decline on the link 840, it changed along with the past of time usually and especially at mobile transmitter and/or receiver, the SINR that the receiver place receives constantly fluctuates.Inner looping 802 is attempted in link 840 to exist remains on the SINR that receives under the situation about changing or near target SINR.

External loop 804 is constantly regulated target SINR, makes to realize target FER at transfer of data.836 receptions of transmission (TX) data processor and process frames of data are to be used for via link 840 transmission.TX data processor 836 also sends the TFCI code word with each Frame.TFCI reliability detector 816 is determined the reliability of TFCI code word at each frame that receives, such as hereinafter description.Reception (RX) data processor 818 deal with data are transmitted and the frame that receives are decoded.RX data processor 818 is further checked each frame through decoding, determines described frame by decoding (well) correctly or by decoding (wiping) mistakenly, and each state through the frame of decoding is provided.Regulon 820 receives described frame state and target FER, and definite target SINR.Regulon 820 can make target SINR reduce Δ DN step-length at each frame that is correctly decoded (or good frame), and is made target SINR increase Δ UP step-length at each by the frame of decoded in error (or good frame).But the required convergency factor of based target FER and external loop is selected Δ UP and Δ DN step-length.

The embodiment of the TFCI reliability detector 816 in Fig. 9 exploded view 8.For the sake of clarity, processing at a frame that receives is hereinafter described.In detector 816, SINR variable quantity computing unit 912 obtains the data rate of SINR that receives and the frame that receives.The SINR that receives can be stored in unit 912, till the data rate of the frame that receives is determined.Then, if the frame that receives has the data rate that is regarded as (for example) invalid speed, unit 912 SINR that can receive upgrades the SINR variable quantity so.SINR side-play amount computing unit 914 receives from the SINR variable quantity of unit 912 and the target FER of (possibility) TFCI.Unit 914 calculates the SINR side-play amount, and for example, as in equation (2), wherein scale factor K decides on the target FER of TFCI.SINR threshold calculations unit 916 receiving target SINR and SINR side-play amount, and calculate the SINR threshold value, for example, as in equation (3).Reliability detector 918 obtains the SINR and the SINR threshold value that receive, SINR and the SINR threshold value that receives compared, and based on the comparison the result will receive the TFCI code word be declared as reliable or unreliable, for example, as in equation (1).Detector 918 provides TFCI reliability indicator.If the TFCI code word that receives is considered to reliably, the TFCI code word that receives of 818 pairs of RX data processors is decoded so, and then according to the TFCI through decoding the frame that receives is decoded.If the TFCI code word that receives is considered to insecure, RX data processor 818 can be declared as invalid frame with the frame that receives so, maybe can carry out blind Detecting, and according to each possible data rate the frame that receives is decoded, till described frame is correctly decoded or has been attempted all data rates.RX data processor 818 provides through the frame, frame state of decoding (its can in order to upgrade target SINR) and frame rate (its can in order to renewal SINR variable quantity).

Figure 10 shows the embodiment that is used for managing at receiver the process 1000 of data everywhere.The frame (frame 1012) that reception is made up of encoded data and signaling (for example, TFCI code word).Determine the received signal quality (SINR that for example, receives) (frame 1014) of the frame that receives.Based target received signal quality and side-play amount are determined threshold value (frame 1016).The described target received signal quality of scalable is with the target FER of the frame realizing receiving.Can determine side-play amount based among the above-described embodiment any one.Determine that whether described received signal quality is greater than described threshold value (frame 1018).If answer is a "Yes", recover (for example, detecting and/or decoding) signaling (the TFCI code word that for example, receives) (frame 1020) so.Then come the encoded data in the frame that receives decode (frame 1022) according to the signaling of being recovered.Otherwise,, announce that so the frame that receives is invalid frame (frame 1024) if be "No" to the answer of frame 1018.

Technology described herein can be used for down link and up link.But the process 600 in the base station execution graph 6 (for example, TFCI), and can be carried out process 1000 among Figure 10, to receive signaling on up link to send signaling on down link.But the process 600 in the terminal execution graph 6 sending signaling on up link, and can be carried out the process 1000 among Figure 10, to receive signaling on down link.Described technology also can be used for various types of signalings, for example, and TFCI, CQI (CQI), rate information, layer 1 (L1) and layer 2 (L2) control signaling etc.

Figure 11 shows the block diagram of base station 110 and terminal 120, and base station 110 and terminal 120 are one in one and terminals in the base station among Fig. 1.110 places in the base station, TX data processor 1110 receiving data frames (for example, being used for DTCH) and control frame (for example, being used for DCCH) are handled (for example, coding and staggered) each frame, and encoded data are provided.Modulator 1112 is handled encoded data producing data symbol, and processing signaling and layer 1 information (for example, TFCI, TPC and SS) to be producing signaling symbols, and the burst of data and signaling symbols is provided.For UTRA TDD, the processing of being undertaken by modulator 1112 can comprise with one or more walsh codes to be expanded data and signaling symbols, and with scrambling code the symbol through expansion is carried out scramble.Then, reflector (TMTR) 1114 is handled described burst to produce down link signal, and described down link signal is transmitted into terminal from antenna 1116.

At terminal 120 places, antenna 1152 is 110 receiving downlink signals from the base station, and provide the signal that receives to receiver (RCVR) 1154.Receiver 1154 adjustment and the described signal that receives of digitlization also provide sample.Then, demodulator 1156 is handled (for example, separating scramble and de-spread) described sample, with the symbol that obtains to receive.1158 pairs of RX data processors send to the symbol that receives of each Frame of terminal 120 and decode, and the data through decoding are provided.RX data processor 1158 further provides each state (for example, good or wipe) through the frame of decoding to controller 1170.

Can be similar to processing to the processing of ul transmissions to downlink transmission.Down link and the uplink processing of UTRA TDD are described among document 3GPP TS 25.221 and the TS25.222.The operation at controller 1130 and 1170 difference direct base station 110 and terminal 120 places.Memory 1132 and 1172 is stored the data and the program code of base station 110 and terminal 120 respectively.

For the signaling transmission, but the process 600 in controller 1130 and/or 1170 execution graphs 6, and determine whether to send the signaling that has through improved reliability.Detect for downlink signaling, the SINR estimator 1174 at terminal 120 places can be estimated the SINR that receives of the frame that each receives.The controller 1170 at terminal 120 places can be implemented process 1000 and/or other process among Figure 10, to detect from the base station 110 signalings that receive (for example, TFCI).Detect for uplink signalling, the SINR estimator 1134 at 110 places, base station can be estimated the SINR that receives of the frame that each receives.The controller 1130 at 110 places, base station can be implemented process 1000 and/or other process among Figure 10, to detect the signaling that receives from terminal 120 (for example, TFCI).

Be understood by those skilled in the art that, can use in multiple different skill and the technology any one to come expression information and signal.For instance, can be by voltage, electric current, electromagnetic wave, magnetic field or particle, light field or particle, or whole above data, instruction, order, information, signal, position, symbol and the chip that may quote in the content of describing represented in its arbitrary combination.

The those skilled in the art will further understand, and various illustrative logical blocks, module, circuit and the algorithm steps of describing in conjunction with embodiments disclosed herein can be through being embodied as electronic hardware, computer software or the two combination.For this interchangeability of hardware and software clearly is described, above substantially according to the functional descriptions of various Illustrative components, block, module, circuit and step various Illustrative components, block, module, circuit and step.With this type of functional hardware that is embodied as still is the design limit that software depends on application-specific and forces at whole system.The those skilled in the art can implement described functional at each application-specific in a different manner, but this type of implementation decision should not be interpreted as causing departing from scope of the present invention.

Availablely implement or carry out various illustrative logical blocks, module and the circuit of describing in conjunction with embodiments disclosed herein with lower device: general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components or its through design to carry out arbitrary combination of function as herein described.General processor can be a microprocessor, but in replacement scheme, processor can be any conventional processor, controller, microcontroller or state machine.Processor also can be embodied as the combination of calculation element, for example combination, a plurality of microprocessor of DSP and microprocessor, combine one or more microprocessors of DSP core or any other this type of configuration.

The method of describing in conjunction with embodiments disclosed herein or the step of algorithm can be embodied directly in hardware, in the software module of being carried out by processor or implement in described both combination.Software module can reside in the medium of any other form known in RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, removable dish, CD-ROM or this technology.Exemplary storage medium is coupled to processor, makes that processor can be from read information, and information is write medium.In replacement scheme, medium can be integral formula with processor.Processor and medium can reside among the ASIC.ASIC can reside in the user terminal.In replacement scheme, processor and medium can be used as discrete component and reside in the user terminal.

It is in order to make the those skilled in the art can make or use the present invention that previous description to announcement embodiment is provided.The those skilled in the art can understand the various modifications to these embodiment easily, and General Principle defined herein can be applied to other embodiment under the situation that does not break away from the spirit or scope of the present invention.Therefore, do not wish that the present invention is limited to embodiment illustrated herein, but wish that the present invention meets and principle disclosed herein and novel feature the widest consistent scope.

Claims (37)

1. equipment, it comprises:

At least one processor, it comprises the frame of encoded data and signaling in order to reception, determine the received signal quality of the described frame that receives, determine based on described received signal quality whether described signaling is reliable, if and described signaling is considered to reliably, recovers described signaling so and described encoded data are decoded according to the described signaling of recovering; And

Memory, it is coupled to described at least one processor.

2. equipment according to claim 1, if wherein described signaling is considered to unreliable, so described at least one processor announces that the described frame that receives is an invalid frame.

3. equipment according to claim 1, wherein said at least one processor based target received signal quality and side-play amount are determined threshold value, and determine based on described received signal quality and described threshold value whether described signaling is reliable.

4. equipment according to claim 3, wherein said at least one processor is regulated described target received signal quality based on the decoded state of the described frame that receives.

5. equipment according to claim 3, wherein said at least one processor is estimated the variable quantity of described received signal quality, and determines described side-play amount based on the described variable quantity of described received signal quality.

6. equipment according to claim 5, wherein said at least one processor are estimated the described variable quantity of described received signal quality based on invalid frame.

7. equipment according to claim 5, wherein said at least one processor are further determined described side-play amount based on the target error rates of described signaling.

8. equipment according to claim 3, wherein said at least one processor determines to detect error rate, described detection error rate indication announces that based on described received signal quality described signaling is the mistake in reliable or insecure process, and described at least one processor is regulated described side-play amount based on described detection error rate.

9. equipment according to claim 8, if wherein described detection error rate surpasses first value, so described at least one processor increases described side-play amount, and if described detection error rate drop to below second value, reduce described side-play amount so.

10. equipment according to claim 8, wherein said at least one processor is kept described side-play amount at the frame of given number after regulating described side-play amount.

11. equipment according to claim 1, wherein said at least one processor receives a plurality of bursts of the described frame that receives, determine the received signal quality of each burst, and determine the described received signal quality of the described frame that receives based on the received signal quality of described a plurality of bursts.

12. equipment according to claim 1, wherein said at least one processor receives a plurality of bursts of the described frame that receives, first group field from each of described a plurality of bursts obtains described encoded data, and second group field from each of described a plurality of bursts obtains described signaling.

13. equipment according to claim 1, wherein said signaling comprise transport-format combination indicator (TFCI).

14. a method, it comprises:

Reception comprises the frame of encoded data and signaling;

Determine the received signal quality of the described frame that receives;

Determine based on described received signal quality whether described signaling is reliable; And

If described signaling is considered to reliably, so

Recover described signaling, and

According to the described signaling of recovering described encoded data are decoded.

15. method according to claim 14, whether wherein said definite described signaling reliably comprises

Based target received signal quality and side-play amount are determined threshold value, and

Determine based on described received signal quality and described threshold value whether described signaling is reliable.

16. method according to claim 15, it further comprises:

Estimate the variable quantity of described received signal quality; And

Described variable quantity based on described received signal quality is determined described side-play amount.

17. method according to claim 15, it further comprises:

Determine to detect error rate based on described received signal quality, described detection error rate indication announces that described signaling is the mistake in reliable or insecure process; And

Regulate described side-play amount based on described detection error rate.

18. an equipment, it comprises:

Be used to receive the device of the frame that comprises encoded data and signaling;

The device that is used for the received signal quality of definite described frame that receives;

Be used for determining whether reliably device of described signaling based on described received signal quality;

If be used for the device that described signaling is considered to reliably recover so described signaling; And

Be considered to reliable device of according to the described signaling of recovering described encoded data being decoded so if be used for described signaling.

19. equipment according to claim 18, wherein said be used for determining described signaling whether reliably device comprise

Be used for based target received signal quality and side-play amount and determine the device of threshold value, and

Be used for determining whether reliably device of described signaling based on described received signal quality and described threshold value.

20. equipment according to claim 19, it further comprises:

Be used to estimate the device of the variable quantity of described received signal quality; And

Be used for determining the device of described side-play amount based on the described variable quantity of described received signal quality.

21. equipment according to claim 19, it further comprises:

Be used for determining that based on described received signal quality indication announces that described signaling is the device of detection error rate of the mistake of reliable or insecure process; And

Be used for regulating the device of described side-play amount based on described detection error rate.

22. a processor readable media, it is used for store instruction, described instruction can operate with:

Reception comprises the frame of encoded data and signaling;

Determine the received signal quality of the described frame that receives;

Determine based on described received signal quality whether described signaling is reliable; And

If described signaling is considered to reliably, so

Recover described signaling, and

According to the described signaling of recovering described encoded data are decoded.

23. processor readable media according to claim 22, and it is further used for store instruction, described instruction can operate with:

Based target received signal quality and side-play amount are determined threshold value, and

Determine based on described received signal quality and described threshold value whether described signaling is reliable.

24. processor readable media according to claim 23, and it is further used for store instruction, described instruction can operate with:

Estimate the variable quantity of described received signal quality; And

Described variable quantity based on described received signal quality is determined described side-play amount.

25. processor readable media according to claim 23, and it is further used for store instruction, described instruction can operate with:

Determine that based on described received signal quality the described signaling of indication declaration is the detection error rate of the mistake in reliable or insecure process; And

Regulate described side-play amount based on described detection error rate.

26. an equipment, it comprises:

At least one processor, it if think inapplicable, sends the described signaling that does not have through improved reliability in order to determine whether be applicable to the signaling of Frame through improved reliability so, if and thought suitable, the described signaling that has through improved reliability would be sent so; And

Memory, it is coupled to described at least one processor.

27. equipment according to claim 26, wherein said at least one processor is determined the data rate of described Frame, and determines whether be applicable to described signaling through improved reliability based on described data rate.

28. equipment according to claim 26, the described signaling of wherein said at least one processor to copy to be obtaining a plurality of copies of described signaling, and the described a plurality of copies that send described signaling are to improve reliability.

29. equipment according to claim 26, the described signaling of wherein said at least one processor to copy to be obtaining two copies of described signaling, and sends described two copies of described signaling in a plurality of time slots of described Frame.

30. equipment according to claim 26, the described signaling of wherein said at least one processor to copy to be obtaining four copies of described signaling, and uses two walsh codes to send described four copies of described signaling in four time slots.

31. equipment according to claim 26, wherein said at least one processor is with the data map of described Frame first group field in each of a plurality of bursts, described signaling is mapped to second group field in each of described a plurality of bursts, and send symbol in each burst with the transmit power level that equates, wherein at first group field and the described second group field time division multiplexing described in each burst.

32. a method, it comprises:

Determine whether to be applicable to the signaling of Frame through improved reliability;

If think inapplicable, send the described signaling that does not have through improved reliability so; And

If think suitable, send the described signaling that has through improved reliability so.

33. method according to claim 32 wherein saidly determines whether to be applicable to that through improved reliability described signaling comprises

Determine the data rate of described Frame, and

Determine whether be applicable to described signaling based on described data rate through improved reliability.

Comprise and duplicate described signaling obtaining a plurality of copies of described signaling 34. method according to claim 32, wherein said transmission have described signaling through improved reliability, and

The described a plurality of copies that send described signaling are to improve reliability.

35. an equipment, it comprises:

Be used for determining whether to be applicable to the device of the signaling of Frame through improved reliability;

If be used for thinking inapplicable, then send the device that does not have through the described signaling of improved reliability; And

If be used for thinking suitable, then send the device that has through the described signaling of improved reliability.

36. equipment according to claim 35, wherein said being used for determines whether be applicable to that through improved reliability the device of described signaling comprises

The device that is used for the data rate of definite described Frame, and

Be used for determining whether to be applicable to the device of described signaling through improved reliability based on described data rate.

37. equipment according to claim 35 wherein saidly is used to send the device that has through the described signaling of improved reliability and comprises

Be used to duplicate the device of described signaling with a plurality of copies of obtaining described signaling, and

Be used to send described a plurality of copies of described signaling to improve the device of reliability.

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