CN102546131B - Softer combination method and equipment for radio link signals - Google Patents
Softer combination method and equipment for radio link signals Download PDFInfo
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- CN102546131B CN102546131B CN201010612849.6A CN201010612849A CN102546131B CN 102546131 B CN102546131 B CN 102546131B CN 201010612849 A CN201010612849 A CN 201010612849A CN 102546131 B CN102546131 B CN 102546131B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
Abstract
The embodiment of the invention provides a softer combination method and equipment for radio link signals and is used for obtaining a maximum signal-to-noise ratio of the radio link signals. The method comprises the following steps that: a primary service base station receives log likelihood ratio (LLR) soft value related information which is obtained by decoding a data frame sent by user equipment through all secondary base stations in an active set, or LLR soft value related information which is obtained by optimizing the LLR soft value related information; and the primary service base station performs maximum ratio combination on the LLR soft value related information which is obtained by decoding the data frame through the primary service base station, and the received LLR soft value related information from the secondary service base stations, and then inputs a result to a decoder. By adoption of the method provided by the invention, the related information of other serving base stations is fully utilized. When the data frame which is received by a link where the primary service base station is located cannot be accurately decoded, the LLR soft value related information of the same data frame which is received on other links can still be used for obtaining a maximum diversity gain, and the data frame is accurately decoded, so that the reliability of data transmission is improved.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to more soft combination method and the equipment of wireless link signals.
Background technology
Along with the develop rapidly of the communication technology, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband CodeDivision Multiple Access) as one of the mainstream technology of 3-G (Generation Three mobile communication system), obtain investigation and application widely in the world.
In order to improve message transmission rate, meet the different needs, WCDMA have employed high-speed packet access (HSPA, High Speed Packet Access) technology, comprise high-speed slender body theory (HSDPA, High Speed Downlink Packet Access) technology and high speed uplink packet access (HSUPA, HighSpeed Uplink Packet Access) technology, wherein, the HSDPA technology introduced, makes the speed that down link can realize up to 14.4Mbit/s.For improving WCDMA system performance, HSDPA has done a large amount of enhancing on a wireless interface, be embodied in physical layer and medium education (MAC, Media AccessControl) layer mainly comprises: shorter Transmission Time Interval (TTI, Transmission Time Interval), new high speed descending sharing channel (HS-DSCH, High Speed Downlink Shared Channel); Introduce 16QAM modulation, code division multiplexing and time division multiplexing combines, new ascending control channel, adopt adaptive modulation and coding to realize fast link adaptation, use mixed automatic repeat request (HARQ, HybridAutomatic Repeat reQuest) and the fast dispatch etc. based on Node B.
The HSDPA of above-mentioned Wideband Code Division Multiple Access (WCDMA) is WCDMA down link for the optimization of Packet Service and evolution.And in Wideband Code Division Multiple Access (WCDMA), up link is optimized and evolution for Packet Service, introduce HSUPA technology.With HSDPA technology type seemingly, HSUPA have employed HARQ, based on the fast dispatch of Node B and 2ms (millisecond) TTI short frame transmission.HSUPA makes single community maximal uplink throughput reach 5.76Mbit/s, greatly strengthen data service bearing capacity and the availability of frequency spectrum of WCDMA up link.
HARQ is forward error correction (FEC, Forward Error Correction) technology and HARQ (ARQ, Automatic Repeat Request) combination of both techniques, namely, at transmitting terminal, cyclic redundancy check (CRC is carried out to each data block, Cyclic Redundancy Check) and CRC sequence is attached to data block, send after chnnel coding.At receiving terminal, after receiving device carries out channel-decoding, carry out same CRC and compare with additional CRC sequence the data block obtained, if identical, show to receive correctly, receiving terminal returns confirmation (ACK) signal; If not identical, show to receive mistake, receiving terminal returns and does not confirm (NACK) signal.When transmitting terminal receives ack signal, just send new data block, otherwise resend the data block of transmission last time.
The HARQ introduced in HSUPA, ensure that receiving terminal can receive correct data block to a certain extent.
In order to improve the coverage of up link, reduce the outage probability of up link, existing up link have employed soft hand-off, namely, subscriber equipment (UE, User Equipment) to all NodeB signal transmissions in Active Set, as long as in Active Set all NodeB have at least one to UE feeding back ACK time, UE judges ACK; When NodeB all in Active Set feed back NACK to UE, UE judges NACK.
Above-mentioned existing soft hand-off does not make full use of the correlation energy of the useful signal of other decoding error links, can not obtain maximum signal to noise ratio, and the Reliability comparotive of transfer of data is low.。
Summary of the invention
The embodiment of the present invention provides more soft combination method and the equipment of wireless link signals, to obtain wireless link signals maximum signal to noise ratio.
The embodiment of the present invention provides a kind of more soft combination method of wireless link signals, comprising: the log-likelihood ratio LLR soft value relevant information that in main serving BS reception Active Set, all auxiliary serving BSs are tried to achieve after decoding to the Frame that subscriber equipment sends or the LLR soft value relevant information of described LLR soft value relevant information gained after optimization process;
Described main serving BS inputs decoder after self is carried out maximum-ratio combing to the LLR soft value relevant information of the described auxiliary serving BS of the log-likelihood ratio LLR soft value relevant information of trying to achieve after the decoding of described Frame and its reception.
The embodiment of the present invention provides a kind of retransmission judging method, comprising: the channel condition information receiving all serving BS feedbacks in Active Set;
According to the length of the transmission block sent before described channel condition information and current time, judge whether to retransmit described transmission block.
The embodiment of the present invention provides a kind of main serving BS, comprise: receiver module, for the LLR soft value relevant information of the log-likelihood ratio LLR soft value relevant information of trying to achieve after receiving Frame decoding that all auxiliary serving BSs in Active Set send subscriber equipment or described LLR soft value relevant information gained after optimization process;
Maximum-ratio combing module, inputs decoder after self is carried out maximum-ratio combing to the log-likelihood ratio LLR soft value relevant information that the log-likelihood ratio LLR soft value relevant information of trying to achieve after described Frame decoding and described receiver module receive.
The embodiment of the present invention provides a kind of subscriber equipment, comprising: receiver module, for receiving the channel condition information of all serving BS feedbacks in Active Set;
Retransmit judge module, for the length of transmission block sent before the channel condition information that receives according to described receiver module and current time, judge whether to retransmit described transmission block.
From such scheme, such scheme takes full advantage of the relevant information of other serving BSs, when the Frame of the reception of the link at main serving BS place can not be correctly decoded, still the LLR soft value relevant information of the same Frame that other links receive can be utilized to obtain maximum diversity gain, be correctly decoded Frame, thus improve the reliability of transfer of data.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the required accompanying drawing used in prior art or embodiment description below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained as these accompanying drawings.
Fig. 1 is the more soft combination method schematic flow sheet of the wireless link signals that the embodiment of the present invention provides;
Fig. 2 is a kind of retransmission judging method schematic flow sheet that the embodiment of the present invention provides;
Fig. 3 is the main serving BS logical construction schematic diagram that the embodiment of the present invention provides;
Fig. 4 is the main serving BS logical construction schematic diagram that another embodiment of the present invention provides;
Fig. 5 is the main serving BS logical construction schematic diagram that another embodiment of the present invention provides;
Fig. 6 is the main serving BS logical construction schematic diagram that another embodiment of the present invention provides;
Fig. 7 is the subscriber equipment logical construction schematic diagram that the embodiment of the present invention provides;
Fig. 8 is the subscriber equipment logical construction schematic diagram that another embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Referring to accompanying drawing 1, is the more soft combination method schematic flow sheet of the wireless link signals that one embodiment of the invention provides, can be as described below.
101, the log-likelihood ratio LLR soft value relevant information that in main serving BS reception Active Set, all auxiliary serving BSs are tried to achieve after decoding to the Frame that subscriber equipment sends or the LLR soft value relevant information of described LLR soft value relevant information gained after optimization process.
Such as, Active Set is the set of the community connected with travelling carriage (MS, Mobile Station) or subscriber equipment (UE, UserEquipment).Such as, in embodiments of the present invention, comprise main serving BS (NodeB) and auxiliary serving BS (NodeB) two class base station in Active Set, UE or MS sends data to main service NodeB and auxiliary service NodeB simultaneously.After main service NodeB and auxiliary service NodeB receives the same frame data of UE transmission, demodulating and decoding is carried out to these frame data.
Whether main service NodeB and auxiliary service NodeB correctly carries out ACK or NACK feedback according to decoding.If main service NodeB and auxiliary service NodeB all can correct decoding, then main service NodeB and auxiliary service NodeB all feeds back confirmation (ACK) message to UE, if main service NodeB and auxiliary service NodeB all can not correct decoding, main service NodeB and auxiliary service NodeB all feeds back non-acknowledgement (NACK) message to UE, if main service NodeB and auxiliary one of them correct decoding of service NodeB, another can not correct decoding, then the NodeB of correct decoding can feed back confirmation (ACK) message to UE, another NodeB of correct decoding can not feed back non-acknowledgement (NACK) message to UE.While feeding back ACK or NACK or afterwards, main service NodeB and auxiliary service NodeB is also respective channel condition information (CSI, Channel State Information) feed back to UE, wherein, CSI comprises the signal to noise ratio (SNR, Signal Noise Ratio) during frame data of UE transmission.In an embodiment of the invention, in order to the channel information making UE know up link, and judge whether the Frame that CSI is corresponding has error of transmission according to channel information, enhancement mode absolute grant channel (E-AGCH, E-DCH AbsoluteGrant CHannel) can be passed through CSI is sent to UE; Further, consider that E-AGCH has larger free time usually, CSI is carried on the code resource that E-AGCH channel can make full use of down link, and do not need the expense additionally increasing code channel resource, therefore, when using E-AGCH to carry CSI, the idle moment in maximum authorization message can be selected to be carried on E-AGCH by CSI and to transmit.
Log-likelihood ratio (LLR, Log Likelihood Ratio) the soft value information of auxiliary service NodeB can be try to achieve after present frame decoding, such as, tries to achieve by taking the logarithm to the SNR of present frame.
Because all service NodeB in Active Set transmit CSI respectively towards UE, replace the NACK message of main service NodeB feedback, therefore make the time delay of Iub mouth can not affect the HARQ procedure of physical layer.
S102, inputs decoder after the LLR soft value relevant information that main serving BS is tried to achieve after self being decoded to this Frame to the LLR soft value relevant information of trying to achieve after data frame decoding and auxiliary serving BS carries out maximum-ratio combing.
In embodiments of the present invention, the LLR soft value relevant information of carrying out maximum-ratio combing had both comprised the LLR soft value relevant information of trying to achieve after main service NodeB decodes to the Frame that UE (or MS) sends, and comprised again the LLR soft value relevant information of trying to achieve after auxiliary service NodeB decodes to the Frame that UE sends.LLR soft value relevant information is all relevant informations of reflection channel quality condition, such as, and signal to noise ratio (SNR, Signal NoiseRatio) etc.And maximum-ratio combing is carried out mainly based on such fact to LLR soft value relevant information, namely, a transmission symbol is due to multipath transmisstion, and its energy is dispersed on different transmission paths, and the time that these energy arrive receiving terminal by these paths is not identical yet.The method of maximum-ratio combing is exactly first by the different paths of this transmission symbol (such as, in the embodiment of the present invention, a transmission symbol is through all auxiliary serving BSs) first collect, the summation of statistical path energy, and calculate the ratio that every paths is shared in gross energy, then this ratio is multiplied by the signal to noise ratio (SNR) of this paths in this transmission symbol moment of transmission, finally these products is the result of maximum-ratio combing according to the result that number of path adds up.
As one embodiment of the invention, when the LLR soft value relevant information that main service NodeB tries to achieve after self being decoded to this Frame to the LLR soft value relevant information of trying to achieve after the Frame frame decoding of UE transmission and the auxiliary NodeB of service carries out maximum-ratio combing, the bit alignment of these LLR soft value relevant informations according to source information can be added.Wherein, source information be terminal produce and not through the initial information of encoding operation, the technology related to related to this comprises source coding and channel coding, wherein message sink coding was encoded to this prime information before source information is sent to channel, to reduce the redundancy of information, improve efficiency of transmission.
It should be noted that, the LLR soft value relevant information of trying to achieve after the current data frame decoding of the LLR soft value relevant information that auxiliary service NodeB sends not necessarily to UE transmission.Such as, if auxiliary service NodeB receives the SNR of Frame lower than certain threshold value, then this auxiliary service NodeB does not send LLR soft value relevant information to main service NodeB immediately.When Frame decoding error, auxiliary service NodeB merges the SNR of SNR that UE utilizes HARQ mechanism to retransmit the Frame of coming and the Frame of decoding error before, and whether the SNR after judgement merging is lower than certain threshold value; If the SNR after merging still lower than this certain threshold value, then repeats said process, until merge the SNR of gained higher than this certain threshold value in the maximum transmission times of HARQ mechanism setting; Auxiliary service NodeB is sent to main service NodeB by calculating the LLR soft value relevant information that (SNR such as, being combined gained carries out Logarithmic calculation) try to achieve to the SNR higher than this certain threshold value.
From the invention described above embodiment, due to main service NodeB be receive Frame decoding that all auxiliary service NodeB in Active Set send UE after the LLR that tries to achieve than soft value information, and be that these LLR are carried out maximum-ratio combing than soft value information and the LLR soft value relevant information of trying to achieve after self decoding to this Frame.Therefore, the present invention takes full advantage of the relevant information of other services NodeB, when the Frame of the reception of the link at main service NodeB place can not be correctly decoded, still the LLR soft value relevant information of the same Frame that other links receive can be utilized to obtain maximum diversity gain, be correctly decoded Frame, thus improve the reliability of transfer of data.
In embodiments of the present invention, all auxiliary service NodeB of main service NodeB reception can be as described below to the LLR soft value relevant information mechanism of trying to achieve after present frame decoding.
Mechanism one: based on the request of main service NodeB, auxiliary service NodeB sends LLR soft value relevant information, main service NodeB receives all auxiliary service NodeB to the LLR soft value relevant information of trying to achieve after present frame decoding.Such as, main service NodeB receives all auxiliary service NodeB to the decoded determination information of present frame, and such as, decode correct, determination information is ACK message, otherwise is NACK message; If all auxiliary service NodeB are all NACK message to the decoded determination information of present frame and main service NodeB to the decoded determination information of present frame, then main service NodeB sends to all auxiliary service NodeB and requires that all auxiliary service NodeB feed back the signaling of LLR soft value relevant informations; All auxiliary service NodeB feedbacks are to the LLR soft value relevant information of trying to achieve after present frame decoding, and main serving BS receives this LLR soft value relevant information.In this mechanism one, the information frame that all auxiliary service NodeB send to main service NodeB confirms control signal frame and LLR soft value relevant information frame actual comprising.First, all auxiliary service NodeB send to main service NodeB and confirm control signal frame, confirm to comprise auxiliary service NodeB to the decoded determination information of present frame in control signal frame, i.e. ACK message or NACK message, confirms that the content in control signal frame is that main service NodeB requires that whether auxiliary service NodeB is to main foundation of serving NodeB feedback LLR soft value relevant information further.If what confirmation control signal frame comprised is all ACK message, then auxiliary service NodeB need not feed back LLR soft value relevant information frame to main service NodeB, otherwise, main service NodeB sends to all auxiliary service NodeB and requires that all auxiliary service NodeB feed back the signaling of LLR soft value relevant information, after auxiliary service NodeB receives this signaling, LLR soft value relevant information frame is fed back, the LLR soft value relevant information of trying to achieve after wherein comprising the Frame decoding that auxiliary service NodeB sends current UE, which secondary retransmission information, version information and constellation rotation information etc. to main service NodeB.
Mechanism two: auxiliary service NodeB initiatively feeds back LLR soft value relevant information to main service NodeB, namely, no matter auxiliary service NodeB is ACK message or NACK message to the decoded determination information of Frame that current UE sends, auxiliary service NodeB feeds back LLR soft value relevant information frame to main service NodeB, and main service NodeB solves all auxiliary service NodeB to the LLR soft value relevant information of trying to achieve after data frame decoding from LLR soft value relevant information frame.Different from the LLR soft value relevant information frame of mechanism one, LLR soft value relevant information frame herein except try to achieve after the Frame decoding that comprises auxiliary service NodeB current UE is sent LLR soft value relevant information, except which secondary retransmission information, version information and constellation rotation information etc., also comprise the decoded determination information of Frame that auxiliary service NodeB sends current UE, i.e. ACK message or NACK message.
It should be noted that, in embodiments of the present invention, the interface of acknowledge control signal frame and/or LLR soft value relevant information frame between main service NodeB and auxiliary service NodeB, it can be the narrowband frequency range configured outside existing WCDMA frequency range, also can be the wireline interface of Iub and so on, the present invention limit this.
In order to reduce the expense of acknowledge control signal frame and/or LLR soft value relevant information frame between main service NodeB and auxiliary service NodeB and shorten time delay, in embodiments of the present invention, auxiliary service NodeB can transmit whole LLR soft value relevant information to main service NodeB.
Such as, consider to source information bit after encoding operation, information bit and redundancy check bit can be produced, wherein coding after information bit be exactly system bits, be also original source information bit.After LLR, also part corresponding to system bits and part (part of nonsystematic position correspondence) corresponding to redundancy check bit can be there is in LLR soft value relevant information, that is, the part of part that NodeB is divided into system bits corresponding to the LLR soft value relevant information after Frame demodulation and nonsystematic position correspondence is served.In order to reduce the redundancy of information source, auxiliary service NodeB can delete some redundancy check bit according to certain algorithm of punchinging.Such as, by the part of the LLR soft value relevant information retention system position correspondence after demodulation, the part of nonsystematic position correspondence in LLR soft value relevant information is all deleted, then, the part of remaining LLR soft value relevant information system position correspondence after only punchinging algorithm to main service NodeB transmission.
And for example, auxiliary service NodeB samples to LLR soft value relevant information according to certain sample rate, the sampled value of the LLR soft value relevant information obtained after sampling is sent to main service NodeB by the interface (such as, Iub interface) between main service NodeB and auxiliary service NodeB.Main service NodeB goes to recover the interpolation point between sampled point according to certain basic function (as sinc function etc.).For example, auxiliary service NodeB calculates 100 LLR soft value relevant informations, even sample drawn space, after obtaining 50 sampled points, these 50 sampled points is transferred to main service NodeB by Iub interface.Main service NodeB is averaging after every two the sampling LLR soft value relevant informations received being added, and the interpolation set obtained is 50 LLR soft value relevant informations that auxiliary service NodeB does not sample.
For another example, auxiliary service NodeB carries out message sink coding according to information-theoretical rate distortion algorithm to LLR soft value relevant information, produces the information after LLR soft value relevant information coding under the target function minimum to source information distortion.LLR soft value relevant information income value after information source compression is transferred to main service NodeB by Iub interface.
Refer to accompanying drawing 2, a kind of retransmission judging method schematic flow sheet that the embodiment of the present invention provides.In the method for accompanying drawing 2 example, the main body of execution can be UE or MS, mainly comprises step:
S201, receives the channel condition information of all service NodeB feedbacks in Active Set.
After in Active Set, main service NodeB and auxiliary service NodeB carries out demodulating and decoding to the Frame that UE or MS sends, ACK or NACK feedback whether is correctly carried out according to decoding, while feeding back ACK message or NACK message or afterwards, main service NodeB and auxiliary service NodeB is by respective channel condition information (CSI, Channel State Information) feed back to UE, wherein, CSI comprises the SNR of the Frame that UE sends.
S202, according to the length of the transmission block sent before channel condition information and current time, judges whether retransmission block.
In order to describe the convenience of problem, UE can be judged whether representing according to an employing discriminant function of retransmission block, it is relevant with which factor that this discriminant function gives basis for estimation.Such as, use discriminant function can P=f (CSI
1, CSI
2..., CSI
k, TBS).Wherein CSI
krepresent the channel condition information of a kth service NodeB feedback, TBS represents the length of institute's transmission block, CSI
kwith the independent variable that TBS is discriminant function f.UE can according to channel condition information CSI
kwith the length TBS of the transmission block sent before current time, the transmission block sent before calculating current time is at the probability of receiving terminal (i.e. main service NodeB and auxiliary service NodeB) erroneous interpretations.
In embodiments of the present invention, CSI information comprises SNR value, and the index value of a 5bit can be used to represent.The SNR of UE to k service NodeB feedback merges, and the formula of the average SNR obtained is SNR
merge=E [(SNR
1 2+ ...+SNR
k 2)/(SNR
1+ ...+SNR
k)], UE adjudicates at the current SNR calculated according to concordance list
mergein value situation, whether the transmission block sent before current time can at main service NodeB and auxiliary service NodeB correct decoding.Following modulation system is QPSK and 4PAM is example, and the judging process of the embodiment of the present invention is described.It will be appreciated by those skilled in the art that being only one herein illustrates that limitation of the present invention of can yet be regarded as also goes for the situation of other modulation systems.
The symbol error probability of QPSK is P
4PAM=1.5 × Q [(0.2 × SNR
merge)
0.5], the symbol error probability of 4PAM is P
qPSK=2 × Q [(2 × SNR
merge)
0.5× sin (0.785)].
Suppose that error code distribution meets Poisson distribution, the error rate is P
e, be the business of R for speed, in a Transmission Time Interval (TTI, Transmission Time Interval), have the probability of n error code to be:
According to above-mentioned formula, in a TTI, the probability of error code (that is, n is 0) whether is had to be
because all wireless links finally merge at main service NodeB, being equivalent to Active Set is 1, and therefore, the value of discriminant function f can use
represent.
The symbol error probability calculated according to above formula and the encoding rate of transmission block, contrast experience mapping table, by P
4PAMand P
qPSKsubstitute into respectively
time, the transmission block that sends before current time under the two kinds of modulation systems probability at receiving terminal (i.e. main service NodeB and auxiliary service NodeB) erroneous interpretations can be obtained.In embodiments of the present invention, experience mapping table can be in engineering practice in the past, that obtain according to signal to noise ratio snr and transmission block length TBS and between block error rate BLER a kind of numerical relation table.
If the transmission block sent before current time is less than setting threshold value at the probability of receiving terminal erroneous interpretations, namely the value of discriminant function f is less than the threshold value of a setting, then UE thinks that receiving terminal can correct decoding, namely, UE judges not need retransmission block, otherwise according to the situation with NACK in HARQ procedure, will judge to need retransmission block, the transmission block sent before current time retransmitted.
Easy understand, UE be the threshold value that arranges of decision function and mainly serve NodeB, the judging threshold of auxiliary service NodeB decoder should be consistent.
Referring to accompanying drawing 3, is the main serving BS logical construction schematic diagram that the embodiment of the present invention provides.For convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.Functional module/unit in the main serving BS of accompanying drawing 3 example can be software module/unit, hardware module/unit or software and hardware combine module/unit, and it comprises receiver module 301 and maximum-ratio combing module 302.
Receiver module 301, for receiving the LLR soft value relevant information of log-likelihood ratio LLR soft value relevant information or described LLR soft value relevant information gained after optimization process of trying to achieve after Frame that in Active Set, all auxiliary service NodeB send subscriber equipment is decoded.
Maximum-ratio combing module 302, inputs decoder after self is carried out maximum-ratio combing to the log-likelihood ratio LLR soft value relevant information that the log-likelihood ratio LLR soft value relevant information of trying to achieve after described Frame decoding and receiver module 301 receive.
The receiver module 301 of accompanying drawing 3 example may further include the first receiving element 401, signaling transmitting element 402 and the second receiving element 403, as shown in Figure 4 the main serving BS that provides of another embodiment of the present invention.
First receiving element 401, for receiving all auxiliary service NodeB to the determination information after data frame decoding.
Signaling transmitting element 402, if are all unacknowledged information NACKs to the determination information after data frame decoding and main service NodeB to the decoded determination information of this Frame for all auxiliary serving BSs, then main service NodeB sends to all auxiliary service NodeB and requires that all auxiliary service NodeB feed back the signaling of LLR soft value relevant informations.
Second receiving element 403, for receiving all auxiliary service NodeB to the log-likelihood ratio LLR soft value relevant information of trying to achieve after data frame decoding.
The maximum-ratio combing module 302 of accompanying drawing 3 example may further include addition unit 501, as shown in Figure 5 the main serving BS that provides of another embodiment of the present invention.Addition unit, for being added main service NodeB self the bit alignment of the log-likelihood ratio LLR soft value relevant information asked for after described Frame decoding according to source information the log-likelihood ratio LLR soft value relevant information of trying to achieve after the Frame decoding of UE transmission and auxiliary service NodeB.
The main serving BS of accompanying drawing 3 to accompanying drawing 5 example may further include information feedback module 601, as shown in Figure 6 the main serving BS that provides of another embodiment of the present invention.Information feedback module 601 for by main service NodeB information feedback to subscriber equipment.
Referring to accompanying drawing 7, is the subscriber equipment logical construction schematic diagram that the embodiment of the present invention provides.For convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.Functional module/unit in accompanying drawing 7 exemplary user equipment can be software module/unit, hardware module/unit or software and hardware combine module/unit, and it comprises receiver module 701 and retransmits judge module 702.
Receiver module 701, for receiving the channel condition information of all serving BS feedbacks in Active Set.
Retransmit judge module 702, for the length of transmission block sent before the channel condition information that receives according to receiver module 701 and current time, judge whether to retransmit this transmission block.
The re-transmission judge module 702 of accompanying drawing 7 example may further include probability calculation unit 801 and judging unit 802, as shown in Figure 7 the subscriber equipment that provides of another embodiment of the present invention.
Probability calculation unit 801, for the length according to the transmission block sent before channel condition information and current time, the transmission block sent before calculating current time is at the probability of receiving terminal erroneous interpretations.
Judging unit 802, is less than setting threshold value for the transmission block sent before current time at the probability of receiving terminal erroneous interpretations, then judge not need to retransmit described transmission block, otherwise judges to need to retransmit described transmission block.
It should be noted that, the content such as information interaction, implementation between each module/unit of said apparatus, due to the inventive method embodiment based on same design, its technique effect brought is identical with the inventive method embodiment, particular content see describing in the inventive method embodiment, can repeat no more herein.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is that the hardware that can carry out instruction relevant by program has come, this program can be stored in a computer-readable recording medium, storage medium can comprise: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), disk or CD etc.
Above the more soft combination method of the wireless link signals that the embodiment of the present invention provides and equipment are described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (2)
1. a retransmission judging method, is characterized in that, described method comprises:
Receive the channel condition information of all serving BS feedbacks in Active Set;
According to the length of the transmission block sent before described channel condition information and current time, judge whether to retransmit described transmission block;
Wherein, the length of the described transmission block according to sending before described channel condition information and current time, judges whether that retransmitting described transmission block comprises:
According to the length of the transmission block sent before described channel condition information and current time, utilize formula P=1-e
-KPe, the transmission block sent before calculating described current time is in the probability P of receiving terminal erroneous interpretations; Wherein Pe is symbol error probability, and K is positive integer;
The transmission block sent before described current time is less than setting threshold value in the probability P of receiving terminal erroneous interpretations, then judging does not need to retransmit described transmission block, otherwise judges to need to retransmit described transmission block.
2. a subscriber equipment, is characterized in that, described subscriber equipment comprises:
Receiver module, for receiving the channel condition information of all serving BS feedbacks in Active Set;
Retransmit judge module, for the length of transmission block sent before the channel condition information that receives according to described receiver module and current time, judge whether to retransmit described transmission block;
Wherein, described re-transmission judge module comprises:
Probability calculation unit, for the length according to the transmission block sent before described channel condition information and current time, utilizes formula P=1-e
-KPe, the transmission block sent before calculating described current time is in the probability P of receiving terminal erroneous interpretations; Wherein Pe is symbol error probability, and K is positive integer;
Judging unit, is less than setting threshold value for the transmission block sent before described current time in the probability P of receiving terminal erroneous interpretations, then judge not need to retransmit described transmission block, otherwise judges to need to retransmit described transmission block.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010612849.6A CN102546131B (en) | 2010-12-29 | 2010-12-29 | Softer combination method and equipment for radio link signals |
| PCT/CN2011/084935 WO2012089145A1 (en) | 2010-12-29 | 2011-12-29 | Softer combination method and device for radio link signals |
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| US9204437B2 (en) * | 2013-02-27 | 2015-12-01 | Qualcomm Incorporated | Methods and apparatus for conditional offload of one or more log-likelihood ratios (LLRs) or decoded bits |
| CN106452681B (en) * | 2013-09-23 | 2019-10-22 | 华为技术有限公司 | Signal processing method and equipment |
| CN106256101B (en) | 2014-05-08 | 2019-10-25 | 华为技术有限公司 | The network equipment and its method for combined decoding |
| CN109120325B (en) * | 2017-06-23 | 2023-04-18 | 中兴通讯股份有限公司 | Signal processing method and device of DPU receiver and storage medium |
| CN109983723B (en) * | 2019-01-23 | 2021-11-16 | 香港应用科技研究院有限公司 | Method and apparatus for improving determination of HARQ-ACK information in a wireless communication system |
| CN116633499B (en) * | 2023-07-24 | 2023-10-03 | 上海星思半导体有限责任公司 | Data storage method, data storage device and processor of receiving end |
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