CN103780333A - Decoding method of control channel, decoding device thereof and mobile terminal - Google Patents
Decoding method of control channel, decoding device thereof and mobile terminal Download PDFInfo
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Abstract
The invention provides a decoding method of a control channel, a decoding device thereof and a mobile terminal. The decoding method comprises a step of encoding different control information respectively to form local code words according to the encoding mode of a sending end, wherein different control information depends on the corresponding values of different channel numbers, a step of correlating each of the local code words with the currently received soft bit sequence so as to obtain the corresponding related value, and a step of determining that the currently received soft bit sequence is effective and solving the corresponding value of the channel number corresponding to the largest related value if any of the related value is larger than or equal to a preset threshold. According to the technical scheme, problems of high computational complexity, long computation time and large power consumption of the decoding method of an HSSCCH type2 channel in the prior art are solved.
Description
Technical field
The present invention relates to mobile communication technology field, particularly the coding/decoding method of control channel and decoding device, mobile terminal.
Background technology
High speed downlink packet access (High Speed Downlink Packet Access, HSDPA) be to improve Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, WCDMA) the of paramount importance technology of network high-speed downlink message transmission rate, that 3GPP puts forward in order to meet the asymmetric demand of up-downgoing data service in R5 agreement, it can not change on the basis of the WCDMA system network architecture of having built, greatly improve user's downstream data traffic speed, maximum can reach 21Mbps in theory, this technology is in WCDMA networking, to improve a kind of important technology of downlink capacity and data service rate.HSDPA has adopted the key technologies such as adaptive modulation technology, rapid mixing retransmission technique and fast dispatch algorithm, and the throughput of system is largely increased.
HSDPA has introduced a new logic channel, i.e. high-speed downlink shared channel (High-Speed Downlink Shared Channel, HSDSCH), for carrying the actual user data of HSDPA.In physical layer, increase downlink high-speed shared control channel (High-speed physical Share Control Channel, HSSCCH), high-speed downstream is shared data channel (High-speed physical downlink shared Channel, and high-speed dedicated control channel (high-speed dedicated physical control channel, HSDPCCH) HSPDSCH).Wherein, downlink high-speed shared control channel has carried the control information of the shared data channel of high-speed downstream, and described control information is divided into Part I (Part1) control information and Part II (Part2) control information successively sends.HSDPA access user (user terminal) detects all code channels of corresponding HSSCCH code channel collection at the Transmission Time Interval (TTI) of each HSSCCH, the Part1 control information that judges whether one's own HSSCCH channel according to this user's UEID occurs, belong to this user's Part1 control information if detect, user terminal adopts corresponding decoded information to start the descrambling and de-spreading to corresponding HSPDSCH channel, and start the decode procedure of the Part2 control information of corresponding HSSCCH channel simultaneously, obtain the relative decoding information of corresponding HSPDSCH channel, after information to be decoded, start the decode procedure to HSPDSCH channel.
Therefore the control information that, correctly receives and detect HSSCCH channel bearing is the prerequisite that correctly receives HSPDSCH channel.According to 3GPP WCDMA standard, comprise the normal transmission pattern of HSSCCH and the transmission mode of HSSCCH less, wherein the HSSCCH under normal transmission pattern is called type1 type, and HSSCCH under HSSCCH less transmission mode is called type2 type, both coded systems are identical, just the implication difference of the bit information of the upper carrying of HSSCCH.
In prior art, the coding/decoding method of the control information of the HSSCCH channel bearing adopting for HSSCCH type1 type comprises the steps:
Step 1: the soft bit sequence of the Part1 part receiving is done successively obtain sequence X 1 after solution mask (De masking), rate de-matching (De rate matching) and Viterbi (Viterbi) decoding of user terminal;
Step 2: after the soft bit sequence of Part2 part is received, read this soft bit sequence and make successively rate de-matching, Veterbi decoding and make the solution mask of user terminal after obtain sequence X 2;
Step 3: combine sequence X 1 obtained above and X2, calculate CRC check result, if calculation check result is identical with reception check results, determine the Part1 part of HSSCCH channel effectively, its value is sequence X 1; Otherwise, determine the Part1 partial invalidity of HSSCCH channel.
Above-mentioned coding/decoding method is actually the inverse process of HSSCCH chnnel coding, finally determines according to CRC check result whether the Part1 of HSSCCH channel partly separates right.The decoding process adopting for HSSCCH type2 channel in prior art is consistent with above-mentioned steps flow process, but for HSSCCH less transmission mode, 3GPP WCDMA standard definition corresponding HSSCCH type2 transformat with it, find in practice, for HSSCCH type2 channel adopt the decoding process computational complexity identical with HSSCCH type1 channel high, cause extend operation time, the power consumption of increase receiving terminal.
More coding/decoding methods about HSSCCH channel can be that WO2010145477A1, denomination of invention are with reference to publication number: dispatching method and the equipment of a Scheduling Method And Device For High-Speed Packet Access System(high-speed packet access system) patent application document.
Summary of the invention
What the present invention solved is that the existing coding/decoding method computational complexity for HSSCCH type2 channel is high, operation time long and the larger problem of power consumption.
For addressing the above problem, the embodiment of the present invention provides a kind of coding/decoding method of control channel, comprise: the coded system according to transmitting terminal encodes to form local code word to different control informations respectively, wherein the respective value of different code channel numbers is depended in different control informations; Each described local code word and the current soft bit sequence receiving are carried out relevant to obtain respectively corresponding correlation; If correlation is greater than or equal to predetermined threshold value described in any one, determines that the described current soft bit sequence receiving is effective, and solve the respective value of the code channel number corresponding with wherein maximum correlation.
Alternatively, also comprise: if all described correlations are all less than described predetermined threshold value, determine that the described current soft bit sequence receiving is invalid.
Alternatively, described control information comprises modulation system bit X
mswith spread spectrum code word sequence X
ccs; Wherein, described spread spectrum code word sequence X
ccsrelevant with the initial code word of code channel to the respective value of described code channel number, and the initial code word of described code channel is determined by the configuration information of upper-layer protocol.
Alternatively, the described coded system according to transmitting terminal is encoded to form local code word to different control informations respectively and is comprised: by described modulation system bit X
mswith described spread spectrum code word sequence X
ccsmix to obtain mixed sequence; Described mixed sequence is carried out to the special mask scrambling of chnnel coding, rate-matched and user successively to obtain described local code word.
Alternatively, the algorithm of described chnnel coding adopts Viterbi coding.
Alternatively, described spread spectrum code word sequence X
ccsin the respective value of code channel number be 0 or 1: wherein, the respective value of 1 code channel is that the respective value of 0,2 code channel is 1.
Alternatively, described control channel is HSSCCH type2 channel.
Alternatively, the described current soft bit sequence receiving refers to the soft bit sequence of the current Part I control information that is carried on described control channel after despreading descrambling receiving; Wherein, described control channel comprises HSSCCH type1 channel and HSSCCH type2 channel.
Based on the coding/decoding method of above-mentioned control channel, the embodiment of the present invention also provides a kind of decoding device of control channel, comprise: local coder unit, for respectively different control informations being encoded to form local code word according to the coded system of transmitting terminal, wherein the respective value of different code channel numbers is depended in different control informations; Correlation analysis unit, for carrying out relevant to obtain respectively corresponding correlation by the each local code word forming via described local coder unit to the current soft bit sequence receiving; Relatively resolution unit, for being greater than or equal to predetermined threshold value at any one correlation obtaining via described correlation analysis unit, determine that the described current soft bit sequence receiving is effective, and solve the respective value of the code channel number corresponding with wherein maximum correlation.
The embodiment of the present invention also provides a kind of mobile terminal, and described mobile terminal comprises the decoding device of above-mentioned control channel.
Compared with prior art, technical solution of the present invention has following beneficial effect:
Do not need the soft bit sequence to receiving to do the processing such as descrambling, rate de-matching and decoding, reduced operand, saved power consumption.
The local code word forming after different control informations being encoded according to the coded system of transmitting terminal can be preserved, only need to calculate once, after the soft bit at every turn receiving, only all local code word of storage need to be done to relevant obtaining after corresponding correlation to this soft bit sequence respectively, determine that according to the magnitude relationship of correlation and predetermined threshold value whether the soft bit sequence receiving is effective later.
After the current soft bit sequence that receives the Part1 part that is carried on control channel, can adopt related operation to judge that whether the soft bit sequence of this Part1 part is effective, and do not need the soft bit sequence of waiting for again Part2 to receive, and read this soft bit sequence and make successively rate de-matching, Veterbi decoding and do after the solution mask of user terminal, the method of recycling CRC check judges that whether the soft bit sequence of Part1 part is effective, thereby has saved operation time and power consumption.
Accompanying drawing explanation
Shown in Fig. 1 is transmitting terminal to being carried on the control information of the HSSCCH type2 channel schematic flow sheet of processing of encoding;
Fig. 2 is the schematic flow sheet of the execution mode of the coding/decoding method of a kind of control channel of the present invention;
Fig. 3 is the schematic flow sheet of a specific embodiment of the coding/decoding method of a kind of control channel of the present invention;
Fig. 4 is the structural representation of the specific embodiment of the decoding device of a kind of control channel of the present invention.
Embodiment
According to the problem of prior art, inventor is according to the feature of the control information of HSSCCH type2 channel bearing, a kind of and different to the control information of HSSCCH type1 channel bearing decoding processes is provided, thus operation time and the power consumption of simplified operation complexity, saving receiving terminal.
For the ease of understanding the technical program, first the coded format of the control information that is carried on HSSCCH type2 channel is described.As stated in the Background Art, the control information of HSSCCH type2 channel bearing comprises the control information of Part1 part and the control information of Part2 part, therefore the control information processing of encoding to two parts respectively.
As shown in Figure 1 be transmitting terminal to being carried on the control information of the HSSCCH type2 channel schematic flow sheet of processing of encoding.As shown in Figure 1, comprise the steps:
In the coding processing procedure of Part1 part control information, execution step S41, by modulation system bit X
mswith spread spectrum code word sequence X
ccsmix to generate mixed sequence X
1; Execution step S42, by described mixed sequence X
1carry out chnnel coding to generate coded sequence Z
1; Execution step S43, by described coded sequence Z
1carry out rate-matched with generating rate matching sequence R
1; Execution step S44, utilizes the special mask code sequence X of user
uewith rate-matched sequence R
1carry out logical operation with to this rate-matched sequence R
1carry out scrambling, generate scramble sequence S
1.
In the coding processing procedure of Part2 part control information, execution step S51, to control information X
typeand X
infomix to generate mixed sequence X
2; Execution step S52, utilizes the special mask X of user
ueand mixed sequence X
1to mixed sequence X
2carry out the special CRC of user and generate to form formation sequence Y; Execution step S53, carries out chnnel coding to generate coded sequence Z to formation sequence Y
2; Execution step S54, to coded sequence Z
2carry out rate-matched with generating rate matching sequence R
2.
Then, execution step S61, respectively to scramble sequence S
1with rate-matched sequence R
2carry out physical channel mapping to generate the sequence of Part1 part control information to be sent and the sequence of Part2 part control information, be carried on HSSCCH and be sent to receiving terminal.
It should be noted that, the coded format of control information that is carried on HSSCCH type1 channel is identical with the coded format of control information that is carried on HSSCCH type2 channel, and different is the implication difference of the control information of two types of channel bearings.In the technical program, different from the implication of Part1 part control information that is carried on HSSCCH type1 channel mainly for the implication of Part1 part control information that is carried on HSSCCH type2 channel, provide a kind of different coding/decoding methods to the control information from HSSCCH type2 channel, with operation time and the power consumption of simplified operation complexity, saving receiving terminal.
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Set forth detail in the following description so that fully understand the present invention.But the present invention can be different from alternate manner described here and implements with multiple, and those skilled in the art can do similar popularization without prejudice to intension of the present invention in the situation that.Therefore the present invention is not subject to the restriction of following public embodiment.
As described in Figure 2 be the schematic flow sheet of the embodiment of the coding/decoding method of a kind of control channel of the present invention.With reference to figure 2, described coding/decoding method comprises the steps:
Step S1: the coded system according to transmitting terminal encodes to form local code word to different control informations respectively, wherein the respective value of different code channel numbers is depended in different control informations;
Step S2: each described local code word and the current soft bit sequence receiving are carried out relevant to obtain respectively corresponding correlation;
Step S3: if correlation is greater than or equal to predetermined threshold value described in any one, determine that the described current soft bit sequence receiving is effective, and solve the respective value of the code channel number corresponding with wherein maximum correlation.
The coding/decoding method providing according to the technical program, first, receiving terminal, for the feature of coded format of Part1 part control information that is carried on HSSCCHtype2 channel, encodes to generate corresponding local code word according to the coded system of transmitting terminal to different Part1 part control informations.Then, utilize the local code word and the current soft bit sequence of Part1 part from HSSCCH channel receiving that generate to carry out related operation, judge according to the result of related operation whether the current soft bit sequence receiving is the soft bit sequence that is carried on the Part1 part on HSSCCH type2 channel, in above-mentioned judged result for be in the situation that, find out corresponding local code word according to wherein maximum correlation, thus solve current receive be carried on the Part1 part control information on HSSCCH type2 channel.
As stated in the Background Art, because described HSSCCH channel is the physical channel of introducing in physical layer in HSDPA, therefore, the technical program is mainly used in WCDMA communication system.
As shown in Figure 3 be the schematic flow sheet of a specific embodiment of the coding/decoding method of a kind of control channel of the present invention.Coding/decoding method below in conjunction with the control channel referring to figs. 2 and 3 the technical program is provided is described in detail.
In specific embodiment, as described in step S1, respectively different control informations is encoded to form local code word according to the coded system of transmitting terminal, wherein the respective value of different code channel numbers is depended in different control informations.
In this step, described control information refers to the Part1 part control information being carried on HSSCCH type2 channel, and transmitting terminal refers to base station.In conjunction with reference to figure 3, the concrete processing procedure that the coded system that receiving terminal adopts described Part1 part control information according to described transmitting terminal is encoded to different Part1 part control informations comprises:
First, execution step S11, by the modulation system bit X comprising in the control information of described Part1 part
mswith spread spectrum code word sequence X
ccsmix to obtain mixed sequence X
3.
Those skilled in the art know, and according to the instruction of carrying in HSSCCH type2 channel, the Part1 part control information being carried on HSSCCH type2 channel has following features: wherein said modulation system bit X
msfor the corresponding Quadrature Phase Shift Keying QPSK modulation of 0(); Described spread spectrum code word sequence X
ccscomprise the signaling bit X that notifies initial code
ccs, 1, X
ccs, 2, X
ccs, 3, X
ccs, 4and the signaling bit X of notice stop code
ccs, 5, X
ccs, 6, X
ccs, 7, X
ccs, 8.For QPSK modulation system, X
ccs, 1, X
ccs, 2, X
ccs, 3, X
ccs, 4=min (P-1,15-P), X
ccs, 5, X
ccs, 6, X
ccs, 7,
wherein, P represents the respective value of code channel number, and Q represents the initial code word of described code channel, and Q can obtain according to the configuration information of upper-layer protocol, that is to say receiving terminal, and the initial code word Q of code channel is known.And according to 3GPP WCDMA agreement, the respective value P of described code channel number only have two kinds may, 0 or 1, wherein, 0 situation corresponding to 1 code channel, 1 situation corresponding to 2 code channels.
Can find out in the Part1 part control information for HSSCCH type2 channel bearing, to only have described spread spectrum code word sequence X
ccsuncertain, and according to mentioned above, different spread spectrum code word sequence X
ccsdepend on the difference of the respective value P of described code channel number, and the value of P also only have two kinds of possibilities.Therefore, in execution step S 11 processes, for two kinds of different spread spectrum code word sequence X
ccsrespectively with described modulation system bit X
msmix to obtain two kinds of corresponding mixed sequence X
3.
In described step S11 by modulation system bit X
mswith spread spectrum code word sequence X
ccsmix adopted hybrid operation method and can adopt prior art to realize, do not repeat them here.
Then, execution step S12 is to step S14, to mixed sequence X
3carry out successively chnnel coding and obtain coded sequence Z
3, to coded sequence Z
3carry out rate-matched to obtain rate-matched sequence R
3and utilize the special mask X of user
ueto rate-matched sequence R
3carry out scrambling to obtain local code word.Wherein, above-mentioned steps S12 can adopt prior art to realize to the detailed process of the special mask scrambling of chnnel coding, rate-matched and user described in step S14.In the present embodiment, the algorithm that described chnnel coding adopts is Viterbi (Viterbi) coding.
It should be noted that, due to the mixed sequence X generating via above-mentioned steps S11
3comprise the spread spectrum code word sequence X different corresponding to two kinds
ccswith modulation system bit X
mstwo kinds of mixed sequences that are mixed to get, therefore need respectively two kinds of mixed sequences to be carried out to the special mask scrambling of chnnel coding, rate-matched and user to step S14 at subsequent step S12, thereby generate two local code words, for example, be made as C
0[i] and C
1[i].
In the present embodiment, in the control information of described Part1 part due to the respective value P(of different code channel numbers 0 or 1) two kinds of different spread spectrum code word sequence X causing
ccs, adopt respectively above-mentioned coded system to form two different local code word C at receiving terminal
0[i] and C
1[i], the length of each local code word is 40 bits (bit).Further, after encoding according to the coded system of transmitting terminal for the Part1 part control information that is carried on HSSCCH type2 channel, only may form this two local code words, therefore receiving terminal can be to adopting these two local code words that this coded system obtains to store, that is to say that receiving terminal only need to form local code word to being carried on after first encoding processing is done in the Part1 part control information of HSSCCH type2 channel, without double counting.
As described in step S2, each described local code word and the current soft bit sequence receiving are carried out relevant to obtain respectively corresponding correlation.
In the present embodiment, receiving terminal (comprises described modulation system bit X to the Part1 part control information being carried on HSSCCH type2 channel according to above-mentioned steps S11 to the processing mode of step S14
mswith described spread spectrum code word sequence X
ccs) form two local code word C after encoding
0[i] and C
1[i].
Then, execution step S21, receiving terminal carries out related operation with these two local code words respectively according to the current soft bit sequence receiving, thereby obtains two corresponding correlations.In the present embodiment, the described current soft bit sequence receiving refers to the soft bit sequence of the current Part I control information that is carried on described control channel after despreading descrambling receiving.Wherein, described control channel comprises HSSCCHtype1 channel and HSSCCH type2 channel, that is to say that the current soft bit sequence after despreading descrambling receiving of receiving terminal may be the Part1 part control information that is carried on HSSCCH type1 channel, may be also the Part1 part control information that is carried on HSSCCH type2 channel.The object of the current soft bit sequence after despreading descrambling receiving being carried out to related operation with two local code words respectively by described step S21 is exactly follow-uply need to determine whether this current soft bit sequence after despreading descrambling receiving is the Part1 part control information that is carried on HSSCCH type2 channel according to the result of related operation.
Specifically, at receiving terminal by two local code word C
0[i] and C
1[i] carries out related operation to obtain corresponding correlation with the current soft bit sequence receiving respectively.Here establishing the described current soft bit sequence receiving is S[i], wherein 0≤i≤39.The expression formula of related operation is:
As described in step S3, if correlation is greater than or equal to predetermined threshold value described in any one, determine that the described current soft bit sequence receiving is effective, and solve the respective value of the code channel number corresponding with wherein maximum correlation.
In the present embodiment, need to set a predetermined threshold value for described correlation at receiving terminal, thereby by the correlation calculating and described predetermined threshold value are compared and determine that whether the described current soft bit sequence receiving effective.The so-called current soft bit sequence receiving effectively refers to that the current soft bit sequence receiving is the Part1 part control information that is carried on HSSCCH type2 channel.Wherein, do not limit a span for described predetermined threshold value, in actual applications, described predetermined threshold value can recently be determined according to the different capacity in the control information of described HSSCCH type2 channel or different noise.
Specifically, execution step S31, receiving terminal is by the correlation R calculating according to above-mentioned steps S21
0and R
1compare with described predetermined threshold value respectively, according to described step S31 comparative result, if any one correlation (R wherein
0or R
1) be greater than or equal to described predetermined threshold value, the section of judgement of described step S31 result is yes, determines that the current soft bit sequence receiving is effective.
Then, execution step S32, judges R
0whether be greater than R
1.Because definite current soft bit sequence receiving is effective, mean that the current soft bit sequence receiving is the Part1 part control information that is carried on HSSCCH type2 channel, further, according to the respective value P that determines corresponding with it code channel number in wherein maximum correlation, solve this Part1 part control information.If the judged result of described step S32 is yes, perform step S33, determine and R
0the respective value of corresponding code channel number; Otherwise, if the judged result of described step S32 is no, perform step S34, determine and R
1the respective value of corresponding code channel number.
Can find out, described in any one, correlation is greater than or equal to predetermined threshold value and comprises two kinds of situations: 1) only have a correlation to be greater than or equal to predetermined threshold value; 2) two correlations are all greater than or equal to predetermined threshold value.In above-mentioned the first situation, maximum correlation must be that correlation that is greater than or equal to predetermined threshold value, thereby determines the respective value P of corresponding with it code channel number according to this correlation.And in above-mentioned the second situation, need further to find out two maximums in correlation, thereby determine the respective value P of corresponding with it code channel number according to maximum correlation.
It should be noted that, above-mentioned is easily realization according to the definite respective value P of corresponding code channel number with it of correlation, because according to maximum correlation (R
0or R
1) can determine corresponding with it local code word (C
0[i] or C
1[i]), then can determine the respective value P that forms the code channel number in the control information of this this locality code word according to described local code word.
Described in above-mentioned steps S1, for the Part1 part control information that is carried on HSSCCH type2 channel, only has described spread spectrum code word sequence X
ccsuncertain, and different spread spectrum code word sequence X
ccsdepend on the difference of the respective value P of described code channel number, the coding/decoding method therefore providing by the present embodiment, is determining after the respective value P of described code channel number, can solve the current Part1 part control information that is carried on HSSCCHtype2 channel receiving.
And the judged result of working as described step S31 is no, namely these two correlation R
0and R
1all be less than in the situation of described predetermined threshold value, execution step S35, determines that the described current soft bit sequence receiving is invalid, and the current soft bit sequence receiving is not the Part1 part control information that is carried on HSSCCH type2 channel.
Compared with prior art, the coding/decoding method that adopts the present embodiment to provide, on the one hand, do not need the soft bit sequence of the Part1 part receiving current to carry out the processing such as solution mask, rate de-matching and channel-decoding (employing Veterbi decoding) of user terminal, reduce the operand of receiving terminal, saved power consumption.On the other hand, because the present embodiment does not adopt CRC check, therefore receiving after the soft bit sequence of Part1 part, do not need the soft bit sequence of waiting for again Part2 part to receive, whether the soft bit sequence that can determine the current Part1 part receiving by the method for above-mentioned related operation is effective, thereby saved the operation time of receiving terminal.
Based on the coding/decoding method of above-mentioned control channel, the embodiment of the present invention also provides a kind of decoding device of control channel.As shown in Figure 4 be the structural representation of the specific embodiment of the decoding device of a kind of control channel of the present invention, described decoding device 1 comprises: local coder unit 11, correlation analysis unit 12 and relatively resolution unit 13.
Local code word is encoded to form to different control informations respectively for the coded system according to transmitting terminal in described local coder unit 11, and wherein the respective value of different code channel numbers is depended in different control informations.In the present embodiment, described control information refers to the Part1 part control information being carried on HSSCCH type2 channel, and described control information comprises modulation system bit X
mswith spread spectrum code word sequence X
ccs, wherein said spread spectrum code word sequence X
ccsrelevant with the initial code word of code channel to the respective value of described code channel number, and the initial code word of described code channel is determined by the configuration information of upper-layer protocol.Described modulation system bit X
mswith spread spectrum code word sequence X
ccsthe mode that embodies can, with reference to the embodiment of method part above, not repeat them here.
Specifically, described local coder unit 11 comprises the first processing unit 111 and the second processing unit 112.Wherein, described the first processing unit 111 is for by described modulation system bit X
mswith described spread spectrum code word sequence X
ccsmix to obtain mixed sequence; Described the second processing unit 112 is for carrying out successively the special mask scrambling of chnnel coding, rate-matched and user to obtain described local code word to processing via described the first processing unit 111 the described mixed sequence obtaining.In the present embodiment, the algorithm that described the second processing unit 112 carries out chnnel coding employing is Viterbi (Viterbi) coding.
Those skilled in the art know, and according to 3GPP WCDMA agreement, in the Part1 part control information being carried on described HSSCCH type2 channel, only have described spread spectrum code word sequence X
ccsuncertain, and different spread spectrum code word sequence X
ccsdepend on the respective value P of different described code channel numbers, and the value of P also only have two kinds may, the respective value of 1 code channel is that the respective value of 0,2 code channel is 1.Therefore have two through the described local coder unit 11 local code word obtaining of encoding, the length of each local code word is 40 bits, and a memory space (not shown in Fig. 2) can be set in described decoding device 1 for storing described local code word.
Described correlation analysis unit 12 is for being undertaken relevant to obtain respectively corresponding correlation by the each local code word forming via described local coder unit 11 and the current soft bit sequence receiving.Wherein, the described current soft bit sequence receiving refers to the soft bit sequence of the current Part I control information that is carried on described control channel after despreading descrambling receiving.The object that described correlation analysis unit 12 carries out related operation to the current soft bit sequence receiving and each local code word is that described relatively resolution unit 13 can determine whether this current soft bit sequence receiving is the Part1 part control information that is carried on HSSCCH type2 channel according to the result of related operation.
Described relatively resolution unit 13 is for being greater than or equal to predetermined threshold value at any one correlation obtaining via described correlation analysis unit 12, the soft bit sequence receiving described in determining is effective, and solves the respective value of the code channel number corresponding with wherein maximum correlation.Described relatively resolution unit 13 is also for being all less than described predetermined threshold value at all described correlations that obtain via described correlation analysis unit 12, and the soft bit sequence receiving described in determining is invalid.Wherein, do not limit a span for described predetermined threshold value, in actual applications, described predetermined threshold value can recently be determined according to the different capacity in the control information of described HSSCCH type2 channel or different noise.
The embodiment of the present invention also provides a kind of mobile terminal, described mobile terminal comprises the decoding device 1 of control channel as shown in Figure 4, and the decoding device 1 in described mobile terminal is applicable to the Part1 part control information of HSSCCH type2 channel bearing to decode.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement to make possible variation and modification to technical solution of the present invention; therefore; every content that does not depart from technical solution of the present invention; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all belong to the protection range of technical solution of the present invention.
Claims (17)
1. a coding/decoding method for control channel, is characterized in that, comprising:
Coded system according to transmitting terminal encodes to form local code word to different control informations respectively, and wherein the respective value of different code channel numbers is depended in different control informations;
Each described local code word and the current soft bit sequence receiving are carried out relevant to obtain respectively corresponding correlation;
If correlation is greater than or equal to predetermined threshold value described in any one, determines that the described current soft bit sequence receiving is effective, and solve the respective value of the code channel number corresponding with wherein maximum correlation.
2. the coding/decoding method of control channel according to claim 1, is characterized in that, also comprises: if all described correlations are all less than described predetermined threshold value, determine that the described current soft bit sequence receiving is invalid.
3. the coding/decoding method of control channel according to claim 1, is characterized in that, described control information comprises modulation system bit X
mswith spread spectrum code word sequence X
ccs; Wherein, described spread spectrum code word sequence X
ccsrelevant with the initial code word of code channel to the respective value of described code channel number, and the initial code word of described code channel is determined by the configuration information of upper-layer protocol.
4. the coding/decoding method of control channel according to claim 3, is characterized in that, the described coded system according to transmitting terminal is encoded to form local code word to different control informations respectively and comprised:
By described modulation system bit X
mswith described spread spectrum code word sequence X
ccsmix to obtain mixed sequence;
Described mixed sequence is carried out to the special mask scrambling of chnnel coding, rate-matched and user successively to obtain described local code word.
5. the coding/decoding method of control channel according to claim 4, is characterized in that, the algorithm of described chnnel coding adopts Viterbi coding.
6. the coding/decoding method of control channel according to claim 3, is characterized in that, described spread spectrum code word sequence X
ccsin the respective value of code channel number be 0 or 1: wherein, the respective value of 1 code channel is that the respective value of 0,2 code channel is 1.
7. the coding/decoding method of control channel according to claim 1, is characterized in that, described control channel is HSSCCH type2 channel.
8. the coding/decoding method of control channel according to claim 1, is characterized in that, the described current soft bit sequence receiving refers to the soft bit sequence of the current Part I control information that is carried on described control channel after despreading descrambling receiving; Wherein, described control channel comprises HSSCCH type1 channel and HSSCCH type2 channel.
9. a decoding device for control channel, is characterized in that, comprising:
Local coder unit, encodes to form local code word to different control informations respectively for the coded system according to transmitting terminal, and wherein the respective value of different code channel numbers is depended in different control informations;
Correlation analysis unit, for carrying out relevant to obtain respectively corresponding correlation by the each local code word forming via described local coder unit to the current soft bit sequence receiving;
Relatively resolution unit, for being greater than or equal to predetermined threshold value at any one correlation obtaining via described correlation analysis unit, determine that the described current soft bit sequence receiving is effective, and solve the respective value of the code channel number corresponding with wherein maximum correlation.
10. the decoding device of control channel according to claim 9, it is characterized in that, described relatively resolution unit, also for being all less than described predetermined threshold value at all described correlations that obtain via described correlation analysis unit, determines that the described current soft bit sequence receiving is invalid.
The decoding device of 11. control channels according to claim 9, is characterized in that, described control information comprises modulation system bit X
mswith spread spectrum code word sequence X
ccs; Wherein, described spread spectrum code word sequence X
ccsrelevant with the initial code word of code channel to the respective value of described code channel number, and the initial code word of described code channel is determined by the configuration information of upper-layer protocol.
The decoding device of 12. control channels according to claim 11, is characterized in that, described local coder unit comprises:
The first processing unit, for by described modulation system bit X
mswith described spread spectrum code word sequence X
ccsmix to obtain mixed sequence;
The second processing unit, for carrying out successively the special mask scrambling of chnnel coding, rate-matched and user to obtain described local code word to the described mixed sequence obtaining via described the first processing unit processes.
The decoding device of 13. control channels according to claim 12, is characterized in that, the algorithm that described the second processing unit carries out chnnel coding employing is Viterbi coding.
The decoding device of 14. control channels according to claim 11, is characterized in that, described spread spectrum code word sequence X
ccsin the respective value of code channel number be 0 or 1: wherein, the respective value of 1 code channel is that the respective value of 0,2 code channel is 1.
The decoding device of 15. control channels according to claim 9, is characterized in that, described control channel is HSSCCH type2 channel.
The decoding device of 16. control channels according to claim 9, it is characterized in that, the described current soft bit sequence receiving refers to the soft bit sequence of the current Part I control information that is carried on described control channel after despreading descrambling receiving; Wherein, described control channel comprises HSSCCH type1 channel and HSSCCH type2 channel.
17. 1 kinds of mobile terminals, is characterized in that, comprising: the decoding device of the control channel as described in claim 9 to 16 any one.
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