CN1964204A - A decoding optimization method and device to intensify special physical control channel - Google Patents

Abstract

The provided decoding optimization method for E-DPCCH comprises: according to SF set and PLmax, obtaining the maximal theoretical value of E-TFCI to determine the decoding output vector; then, obtaining the decoding result. This invention improves decoding speed for E-DPCCH.

Description

A kind of decoding optimization method and device that strengthens Dedicated Physical Control Channel

Technical field

The present invention relates to the decoding technique in the radio communication, relate in particular to a kind of decoding optimization method and device that strengthens Dedicated Physical Control Channel.

Background technology

WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA) inserts) R6 (version 6) version introducing HSUPA (High Speed Downlink Packet Access, high speed uplink packet inserts) technology, at up E-DPCCH (the Energy ofDedicated Physical Control Channel that increased, strengthen Dedicated Physical Control Channel) and E-DPDCH (Energy of Dedicated Physical Data Channel strengthens Dedicated Physical Data Channel).HSUPA is a kind of enhancement mode 3G transmission technology, its objective is the system uplink ability that improves, in order to realize the transmission of HSUPA, user that it must on E-DPCCH with relevant transformat indication information E-TFCI (Energy of Transport Format Combination Indicator, transformat merges indication) be transferred to the base station, so that correct Data Receiving is carried out in the base station.

The control information that E-DPCCH carries comprises: re-transmission sequence number (RSN): xrsn, 1, xrsn, 2; E-TFCI information: xtfci, 1, xtfci, 2 ..., xtfci, 7; Happy bit: xh, 1.

The coding flow process of E-DPCCH as shown in Figure 1, E-TFCI information xtfci, 1, xtfci, 2 ..., xtfci, 7; Re-transmission sequence number xrsn, 1, xrsn, 2 and Happy bit xh, 1 is together multiplexing by multiplexer, forms the E-DPCCH output sequence of 10bit: x1, x2 ..., x10, multiplexing rule is as follows:

xk＝xh，1 k＝1

xk＝xrsn，4-k k＝2，3

xk＝xtfci，11-k k＝4，5，...，10

Above-mentioned output sequence is encoded through channel encoder, and the channel coding method of E-DPCCH is identical with TFCI coded system in the Release 1999, the subcode that adopts 2 rank Reed-Muller to encode.Coding is at the multiplexing output sequence x1 of E-DPCCH, x2 ..., x10, coding as shown in Equation (1):

$z_i=\underset{n=0}{\overset{9}{\mathrm{\Σ}}}(x_{n+1}\×M_{i,n})\mathrm{mod}2---\left(1\right)$

Wherein, i=0,1 ..., 29.Result behind the coding is z0, z1 ..., z29, described coding result obtains the final coding result of E-DPCCH through the physical channel mapping.

E-DPCCH can use for reference the TFCI interpretation method fully in the decoding of NodeB side, interpretation method commonly used is: establish the soft information S0 of E-DPCCH, S1, ..., S29 constitutes the input vector A of 30 dimensions, and B is (N, 30) Hadamard (Hadamard) matrix, A*B is the output vector C of N dimension, maximizing in N dimensional vector C, and its position is exactly the decode results of E-DPCCH.

According to the coding flow process of E-DPCCH, the maximum occurrences of 10 bit output sequences after E-DPCCH is multiplexing is 1024, and the dimension N of output vector C just is 1024.

When NodeB carries out E-DPCCH decoding at every turn, need at least to carry out multiply-add operation 1024*30=30720 time, operand is huge.And in actual applications, general business N value is smaller, such as typical 384K business, the N span is that (E-TFCI is 35 to 280-288, Table Index is 1), the business that the N value is bigger, the likelihood ratio of appearance is less, and number of users is fewer, uses the maximum of fixing output sequence to decipher can to cause the wasting of resources, decoding speed slower.

Summary of the invention

The problem to be solved in the present invention provides a kind of decoding optimization method and device that strengthens Dedicated Physical Control Channel, to solve the defective that the decoding speed that utilizes fixedly output sequence maximum decoding to cause in the prior art reaches the wasting of resources slowly.

For realizing purpose of the present invention, the invention provides a kind of embodiment that strengthens the decoding optimization method of Dedicated Physical Control Channel, may further comprise the steps:

Obtain the maximum theoretical that strengthens transformat merging indication according to the spreading factor collection and the maximum punching factor;

The maximum theoretical that merges indication according to described enhancing transformat is determined the decoding output vector;

Obtain the decode results that strengthens Dedicated Physical Control Channel according to described decoding output vector.

The present invention also provides a kind of embodiment that strengthens the decoding optimization device of Dedicated Physical Control Channel, comprising: strengthen transformat and merge indication maximum theoretical acquiring unit, decoding output vector generation unit and obtain the decode results unit;

Described enhancing transformat merges indication maximum theoretical acquiring unit, is used to obtain the maximum theoretical that strengthens transformat merging indication;

Described decoding output vector generation unit is used for determining the decoding output vector;

The described decode results unit that obtains is used to obtain the decode results that strengthens Dedicated Physical Control Channel.

Compared with prior art, the present invention has the following advantages:

The present invention is according to SF (Spreading Factor, spreading factor) collection and PLmax (PuncturingLimit, maximum beat the sub-factor) maximum theoretical of acquisition E-TFCI, and determine the E-DPCCH decoding range according to maximum E-TFCI, and then the value of the N of the N dimensional vector C in definite decode procedure, no longer resemble before be fixed as 1024.Maximum such as the 10bit information of E-DPCCH channel is 31, and N just gets 32 so, carries out an E-DPCCH decoding and only need carry out 32*30=960 time multiply-add operation, and operand reduces greatly, thereby realizes the decoding speed of raising E-DPCCH channel.

Description of drawings

Fig. 1 is the coding flow chart of E-DPCCH in the prior art;

Fig. 2 is a kind of embodiment flow chart that strengthens the decoding optimization method of Dedicated Physical Control Channel of the present invention;

Fig. 3 is a kind of decoding optimization device example structure figure that strengthens Dedicated Physical Control Channel of the present invention.

Embodiment

The present invention strengthen Dedicated Physical Control Channel decoding optimization method first embodiment as shown in Figure 2, may further comprise the steps:

Step s201 obtains the maximum theoretical that strengthens transformat merging indication according to the spreading factor collection and the maximum punching factor.When setting up E-DCH (Enhanced Dedicated Transport Channel, strengthen dedicated channel) during link, SF collection and maximum maximum theoretical of beating sub-factor calculating E-TFCI according to the high level configuration, so just determined the maximum magnitude of high 7bit of the 10bit information of E-DPCCH channel, the maximum of the 10bit information of E-DPCCH channel is also just determined thereupon.

Wherein, obtaining the maximum theoretical that strengthens transformat merging indication specifically comprises: concentrate from spreading factor and choose minimal frequency spreading factor; Obtain the physical channel transmission rate according to minimal frequency spreading factor: physical channel transmission rate=(spreading rate * Transmission Time Interval)/minimal frequency spreading factor; The punching rate that bit number=physical channel transmission rate after the maximum punching factor corresponding codes/maximum punching factor pair is answered; According to the bit number after physical channel transmission rate and the maximum punching of the maximum punching factor acquisition factor corresponding codes; Obtain maximum theoretical according to the bit number behind the coding: in concordance list, search, obtain n index value, bit number after making the Turbo of the bit number＜n+1 index value after bit number＜=maximum punching factor corresponding codes behind the Turbo coding of n index value correspondence encode, then n is a maximum theoretical.

Step s202 is according to strengthening the definite decoding of the maximum theoretical output vector that transformat merges indication.The decoding input vector multiply by hadamard matrix and obtains the decoding output vector, wherein, determines the line number of hadamard matrix, determines the columns of hadamard matrix according to the decoding input vector according to maximum theoretical.The line number of determining hadamard matrix according to maximum theoretical specifically comprises: 2 ^M-1＜maximum theoretical＜=2 ^m, wherein m is a natural number, then 2 ^mBe the line number of hadamard matrix, also promptly decipher the dimension of output vector.

Step s203 obtains the decode results that strengthens Dedicated Physical Control Channel according to the decoding output vector.At first search the maximum of decoding output vector, then, according to the corresponding decode results that strengthens Dedicated Physical Control Channel of peaked line number acquisition of decoding output vector, for example, the peaked position of decoding output vector is at the 5th row, and its binary decoding result is 00000101; The peaked position of decoding output vector is at eighth row, and its binary decoding result is 00001000.

Second embodiment that utilizes concrete parameter the present invention to be strengthened the decoding optimization method of Dedicated Physical Control Channel below is elaborated.

Suppose: the SF collection=SF_256, and SF_128, SF_64}, maximum punching factor PLmax=1 adopts 10ms TTIE-DCH Transport Block Size Table 0.

Can know that according to the SF collection minimum SF is 64, when Transmission Time Interval be 10ms, when spreading rate is 3.84Mbps, corresponding physics channel transmission rate=3.84Mbps*10ms (TTI)/64 (SF)=600bit.

The minimum SF that SF concentrates has determined the maximum rate that the physical channel of current link can carry, if surpassed 600bit/s, can not set up link, high-rise when configuration SF collection, the E-TFCI of corresponding configuration can not cause this result certainly, if this result then is illegal situation.

Bit after the E-TFCI corresponding codes needs to carry out rate-matched before will transmitting on physical channel, rate-matched has dual mode, a kind of is repetition, a kind of is exactly punching, Chuan Shu bit number is greater than the actual bit number that can transmit of physical channel if desired, then to punch (destroying a part of bit), otherwise, just repeat (some bit is repeated to transmit several times).If the bit number that physical channel can transmit is determined back (the minimum SF of SF collection), then possible maximum E-TFCI is that the bit of destroying as much as possible at the employing hole knockout (is that punching rate PL is as far as possible little, PLmax refers to destroy maximum number bits, its value minimum) occurs under the situation, because, promptly destroy seldom bit if punching rate PLmax is not minimum, perhaps do not destroy bit, the bit number after the very little E-TFCI corresponding codes just surpasses the bearing capacity of physical channel.Therefore, during E-TFCI maximum on the theory of computation, suppose that bit number after these E-ETFCI corresponding codes by (PL minimum) under the maximum punching situation, can transmit on physical channel.

Bit number behind the coding of the maximum punching factor is: about 600bit/0.44 (the corresponding punching rate of PLmax=1 is 44%)=1364bit.Wherein, maximum punching factor Plmax is: 0,1,2 ..., 15, corresponding maximum punching rate from 40% to 100%, step-length is 4%; The percentage of total bit number before maximum punching rate punches for remaining bits number after the punching accounts for.

Table 1:10ms TTI E-DCH Transport Block Size Table 0

TB Index	TB Size (bits)	TB Index	TB Size (bits)	TB Index	TB Size (bits)	TB Index	TB Size (bits)	TB Index	TB Size (bits)
										0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23	18 120 124 130 135 141 147 153 159 166 172 180 187 195 203 211 220 229 239 249 259 270 281 293	30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53	389 405 422 440 458 477 497 517 539 561 584 608 634 660 687 716 745 776 809 842 877 913 951 991	60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83	1316 1371 1428 1487 1549 1613 1680 1749 1822 1897 1976 2058 2143 2232 2325 2421 2521 2626 2735 2848 2966 3089 3217 3350	90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113	4452 4636 4828 5029 5237 5454 5680 5915 6161 6416 6682 6959 7247 7547 7860 8186 8525 8878 9246 9629 10028 10444 10877 11328	120 121 122 123 124 125 126 127	15051 15675 16325 17001 17706 18440 19204 20000

24 25 26 27 28 29

305 317 331 344 359 374

54 55 56 57 58 59

1032 1074 1119 1165 1214 1264

84 85 86 87 88 89

3489 3634 3784 3941 4105 4275

114 115 116 117 118 119

11797 12286 12795 13325 13877 14453

1 obtain by tabling look-up:

During TB Index=32, TB size=422bit, the bit number behind the TC coding is: 1350bit

During TB Index=33, TB size=440bit, the bit number behind the TC coding is: 1404bit

Wherein, TC is encoded to the abbreviation of turbo coded system, and the bit number behind the coding is=(bit number+24bit (CRC bit number) before the coding) * 3+12, if be 422 before the coding, behind the coding is: (422+24) * 3+12=1350; If before the coding is 440, behind the coding be: (440+24) * 3+12=1404; E-TFCI is big more, and the bit number behind the TC coding is just many more.

Above-mentioned TB Index is exactly the value of E-TFCI, and after E-TFCI surpassed 32 as can be seen, bit number had surpassed the physical channel transmission rate, so the maximum theoretical of E-TFCI is 32.E-TFCI is 32 o'clock, and the bit number behind the coding can transmit on physical channel by (PL minimum) under the maximum punching situation.And E-TFCI is 33 o'clock, and the bit number behind the coding can not transmit (bearing capacity that surpasses physical channel) by (PL minimum) under the maximum punching situation on physical channel, just illustrate that maximum E-TFCI is 32.If reality does not adopt maximum punching rate, then Dui Ying E-TFCI can be littler, and therefore, what obtain above is exactly maximum theoretical.

The present invention is a kind of strengthen Dedicated Physical Control Channel the decoding optimization device embodiment as shown in Figure 3, comprising: strengthen transformat and merge indication maximum theoretical acquiring unit 100, decoding output vector generation unit 200 and obtain decode results unit 300.Strengthen transformat and merge the maximum theoretical that indication maximum theoretical acquiring unit 100 is used to obtain enhancing transformat merging indication; Decoding output vector generation unit 200 is used for determining the decoding output vector; Obtain decode results unit 300 and be used to obtain the decode results that strengthens Dedicated Physical Control Channel.

Wherein strengthening transformat merging indication maximum theoretical acquiring unit 100 further comprises: the coded bit that physical channel transmission rate computation subunit 102, spreading factor collection storing sub-units 103, maximum punching factor tabulation subelement 101, maximum punching factor pair are answered is counted computation subunit 104 and maximum theoretical computation subunit 105.Physical channel transmission rate computation subunit 102 is used for according to the minimal frequency spreading factor of spreading factor collection storing sub-units 103 and spreading rate, Transmission Time Interval Computational Physics channel transmission rate; The coded bit that maximum punching factor pair is answered is counted computation subunit 104 and is used for according to the bit number behind the corresponding punching rate acquisition coding of physical channel transmission rate and maximum punching factor tabulation subelement 101; Maximum theoretical computation subunit 105 is used for according to the bit number acquisition maximum theoretical of tabling look-up behind the coding.

Decoding output vector generation unit 200 further comprises: the hadamard matrix line number generates subelement 201, the decoding input vector receives subelement 202, hadamard matrix generation subelement 203 and multiplication subelement 204.The hadamard matrix line number generates subelement 201 and is used for determining the hadamard matrix line number according to maximum theoretical; The decoding input vector receives subelement 202 and is used for receiving the decoding input vector, and will receive vectorial dimension as the columns of giving hadamard matrix; Hadamard matrix generates subelement 203 and is used for generating hadamard matrix according to hadamard matrix columns and line number; Multiplication subelement 204 is used for hadamard matrix and decoding input vector are done multiplying, obtains the decoding output vector.

Obtaining decode results unit 300 further comprises: obtain decoding output vector maximum subelement 301 and decode results and generate subelement 302.Obtaining decoding output vector maximum subelement 301 is used for searching maximum in the decoding output vector; Decode results generates subelement 302 and is used for obtaining the corresponding decode results that strengthens Dedicated Physical Control Channel according to peaked line number.

More than disclosed only be specific embodiments of the invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.

Claims (12)

1, a kind of decoding optimization method that strengthens Dedicated Physical Control Channel is characterized in that, may further comprise the steps:

Obtain the maximum theoretical that strengthens transformat merging indication according to the spreading factor collection and the maximum punching factor;

The maximum theoretical that merges indication according to described enhancing transformat is determined the decoding output vector;

Obtain the decode results that strengthens Dedicated Physical Control Channel according to described decoding output vector.

2, strengthen the decoding optimization method of Dedicated Physical Control Channel according to claim 1, it is characterized in that, the described maximum theoretical that strengthens transformat merging indication of obtaining specifically comprises:

From the concentrated minimal frequency spreading factor of choosing of described spreading factor;

Obtain the physical channel transmission rate according to described minimal frequency spreading factor;

According to the bit number after described physical channel transmission rate and the described maximum punching factor corresponding codes of described maximum punching factor acquisition;

Obtain described maximum theoretical according to the bit number behind the described coding.

3, as the decoding optimization method of enhancing Dedicated Physical Control Channel as described in the claim 2, it is characterized in that described physical channel transmission rate=(spreading rate * Transmission Time Interval)/described minimal frequency spreading factor.

4, as the decoding optimization method of enhancing Dedicated Physical Control Channel as described in the claim 2, it is characterized in that the punching rate that the bit number=described physical channel transmission rate after the described maximum punching factor corresponding codes/described maximum punching factor pair is answered.

5, as the decoding optimization method of enhancing Dedicated Physical Control Channel as described in the claim 2, it is characterized in that the described maximum theoretical of described acquisition specifically comprises:

In concordance list, search, obtain n index value, make

Bit number behind the Turbo coding of the bit number＜n+1 index value correspondence after the bit number behind the Turbo coding of n index value correspondence＜=maximum punching factor corresponding codes, then described n is described maximum theoretical.

6, strengthen the decoding optimization method of Dedicated Physical Control Channel according to claim 1, it is characterized in that, determine that according to described maximum theoretical the decoding output vector specifically comprises:

Described decoding input vector multiply by hadamard matrix and obtains the decoding output vector, wherein, determines the line number of hadamard matrix, determines the columns of described hadamard matrix according to the decoding input vector according to described maximum theoretical.

7, as the decoding optimization method of enhancing Dedicated Physical Control Channel as described in the claim 6, it is characterized in that, determine that according to described maximum theoretical the line number of hadamard matrix specifically comprises:

2 ^M-1＜maximum theoretical＜=2 ^m, wherein m is a natural number,

Then 2 ^mLine number for hadamard matrix.

8, strengthen the decoding optimization method of Dedicated Physical Control Channel according to claim 1, it is characterized in that, the described decoding output vector of described employing is obtained the decode results that strengthens Dedicated Physical Control Channel and is specifically comprised:

Search the maximum of described decoding output vector;

Peaked line number according to described decoding output vector obtains the corresponding decode results that strengthens Dedicated Physical Control Channel.

9, a kind of decoding optimization device that strengthens Dedicated Physical Control Channel is characterized in that, comprising: strengthen transformat and merge indication maximum theoretical acquiring unit, decoding output vector generation unit and obtain the decode results unit;

Described enhancing transformat merges indication maximum theoretical acquiring unit, is used to obtain the maximum theoretical that strengthens transformat merging indication;

Described decoding output vector generation unit is used for determining the decoding output vector;

The described decode results unit that obtains is used to obtain the decode results that strengthens Dedicated Physical Control Channel.

10, as the decoding optimization device of enhancing Dedicated Physical Control Channel as described in the claim 9, it is characterized in that described enhancing transformat merges indication maximum theoretical acquiring unit and further comprises: the coded bit that physical channel transmission rate computation subunit, spreading factor collection storing sub-units, maximum punching factor tabulation subelement, maximum punching factor pair are answered is counted computation subunit and maximum theoretical computation subunit;

Described physical channel transmission rate computation subunit is used for according to the minimal frequency spreading factor of described spreading factor collection storing sub-units and spreading rate, Transmission Time Interval Computational Physics channel transmission rate;

The coded bit that described maximum punching factor pair is answered is counted computation subunit, is used for the bit number after corresponding punching rate according to described physical channel transmission rate and described maximum punching factor tabulation subelement obtains described coding;

Described maximum theoretical computation subunit, being used for tabling look-up according to the bit number behind the described coding obtains described maximum theoretical.

11, as the decoding optimization device of enhancing Dedicated Physical Control Channel as described in the claim 10, it is characterized in that described decoding output vector generation unit further comprises: the hadamard matrix line number generates subelement, the decoding input vector receives subelement, hadamard matrix generation subelement and multiplication subelement;

Described hadamard matrix line number generates subelement, is used for determining the hadamard matrix line number according to described maximum theoretical;

Described decoding input vector receives subelement, is used for receiving the decoding input vector, and with the vectorial dimension of described reception as columns to described hadamard matrix;

Described hadamard matrix generates subelement, is used for generating hadamard matrix according to described hadamard matrix columns and line number;

Described multiplication subelement is used for described hadamard matrix and described decoding input vector are done multiplying, obtains the decoding output vector.

12, as the decoding optimization device of enhancing Dedicated Physical Control Channel as described in claim 9 or 10, it is characterized in that the described decode results unit that obtains further comprises: obtain decoding output vector maximum subelement and decode results and generate subelement;

The described decoding output vector maximum subelement that obtains is used for searching maximum in described decoding output vector;

Described decode results generates subelement, is used for obtaining the corresponding decode results that strengthens Dedicated Physical Control Channel according to described peaked line number.

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