Title of Invention

METHOD AND APPARATUS FOR CODING OF E-DCH DEDICATED PHYSICAL CONTROL CHANNEL

Abstract Embodiments of the present invention provide a method and apparatus for coding of an E-DCH Dedicated Physical Control Channel (E-DPCCH). The method includes encoding information bits of signalling on an E-DPCCH in a BLOCK coding manner. The apparatus includes a unit for encoding information bits of signalling on an E-DPCCH in a BLOCK coding manner. The embodiments of the present invention can solve the problem in which signalling overhead is high during signalling encoding, thus reduce transmission power of a terminal.
Full Text

Method and Apparatus for Coding of E-DCH Dedicated
Physical Control Channel
Field of the Invention
The present invention relates to wireless communications, and more particularly, to a method and an apparatus for coding of an E-DPCCH (E-DCH (Enhanced Dedicated Channel) Dedicated Physical Control Channel).
Background of the Invention
Wideband Code Division Multiple Access (WCDMA) of which the system is being perfected represents one of the three main 3rd Generation (3G) standards. In Release 5, WCDMA introduces a High Speed Downlink Packet Access (HSDPA) technique, which has been one of the most important characters of Release 5. The HSDPA technique, which enables the throughput of the WCDMA downlink to be two to three times the throughput provided by the prior releases, can be an effective bearer of various packet services, satisfying the demand for such multimedia service information as data, video, image and the like apart from voice anywhere at any moment.
Correspondingly, it is considered to introduce the standard of a High Speed Uplink Packet Access (HSUPA) technique into Release 6 of WCDMA. The core target of the HSUPA technique is to enable the throughput of a WCDMA uplink to increase by 50% to 70% than that provided by the prior releases to enhance the throughput of uplink packet data using several enhanced uplink techniques. HSUPA technique is an up-to-date technique, and the standard of HSUPA technique in Release 6 of a WCDMA system protocol is being shaped.
At present, while which coding manner will be adopted for an E-DPCCH of HSUPA technique has not been specified, the main technical solution is to adopt a Convolutional Coding (CC) manner. The current CC in WCDMA defines two coding rates of which one is 1/2 and the other is 1/3, and the constraint length is 9; tail bits having 8 bits of value 0 often need to be added to the coding block to be encoded so as to assist the CC. Although the CC is a mature coding technique, adding 8-bit tail bits to the coding block will bring a considerable signalling overhead for an E-DPCCH due to fewer effective bits of

signalling on an E-DPCCH, for example, NodeB scheduling information consists of at most 10 effective bits and a Hybrid Automatic Repeat Request (HARQ) consists of at most 12 effective bits. As shown in Table 1, the numbers of signalling overhead of the tail bits of the NodeB scheduling information and HARQ information are 44% and 40%, respectively.

Summary of the Invention
Embodiments of the present invention provide a method and apparatus for coding of an E-DCH Dedicated Physical Control Channel (E-DPCCH), encoding an E-DPCCH with lower signalling coding overhead.
According to an embodiment, the method for coding of an E-DPCCH includes:
encoding information bits of signalling on an E-DPCCH in a BLOCK coding manner.
Said encoding the information bits of signalling includes:
dividing the information bits of signalling on an E-DPCCH into at least one data block if the number of the information bits of signalling on an E-DPCCH is not more than a threshold; and encoding the data block.
The threshold is at most 10 to 12. Said encoding the data block includes: encoding the data block with a second-order Reed-Muller encoder.
According to another embodiment, the apparatus for coding of an E-DCH Dedicated Physical Control Channel (E-DPCCH) includes:
a unit for encoding information bits of signalling on an E-DPCCH in a BLOCK

coding manner.
The unit includes:
a module for dividing the information bits of signalling on an E-DPCCH into at least one data block;
a module for encoding the data block in the BLOCK coding manner.
The module for encoding the data block in a BLOCK coding manner includes one or a plurality of BLOCK encoders, used for encoding the data blocks consisting of different numbers of information bits in a BLOCK coding manner; and said BLOCK encoder is a second-order Reed-Muller encoder.
Through analyzing the overhead of the information bits of signalling on an E-DPCCH in the CC manner, the method in accordance with an embodiment of the present invention adopts a BLOCK coding manner for signalling on E-DPCCH in the HSUPA technique, which encodes the information bits to be transferred as a data block without being annoyed by each traditional and complicated coding manner and the 8-bit tail bits in the CC manner, thereby simply and effectively reducing signalling overhead and saving transmission power of a terminal.
Brief Description of the Drawings
Figure 1 is a simplified diagram illustrating a channel coding process of information bits of signalling in accordance with an embodiment of the present invention.
Detailed Description of the Invention
The present invention is hereinafter further described in detail with reference to the accompanying drawings and preferred embodiments to further clarify the technical solutions and advantages of the present invention.
Though almost all coding techniques conventionally used are maturely, a CC technique, as a coding technique with simple implementation and high encoding performance, is adopted widely in the art. However, tail bits having 8 bits of value 0 often need to be added to the coding block before being encoded so as to assist the CC during

the coding procedure thereof adopted in a WCDMA system, which has little impact on the case that the information bits to be encoded are relatively more but brings obvious waste of power (about 2.6 dB) in the case that information bits are fewer, especially in the case of signalling coding. An embodiment of the present invention provides a BLOCK coding in view of the characteristic that information bits of signalling are fewer on an E-DPCCH, for example number of information bits is 10 or 12. An embodiment of the present invention describes the coding process, for example, in the case that the number of information bits of signalling is 10.

inputted. The encoder has, for example, the combinations of 10 basic sequences which are listed in Table 2. Information bits to be encoded are divided into at least one data block, and each data block consists of 10 bits and is inputted into the encoder. 10-bit information bits are, for example, considered as a data block, and the data block is inputted into the encoder in turn as aO, al, a2, a3, a4, a5, a6, a7, a8 and a9 respectively, which correspond to information bits index expressed in unsigned binary form. The output codeword bits corresponding to the information bits index are, for example, given by:

where i is the sequence number of the output codeword bits, Miin is the i-th value of the n-th basic sequence shown in Table 2, and b,(i= 0, 1, 2, ..., 31) denote the output
codeword bits. bt (i = 0, 1, 2, ..., 29) are selected as 30-bit codeword of the information
bits.
Other encoders which may implement BLOCK coding also may be adopted. The BLOCK coding disclosed by an embodiment of the present invention is suitable for the situation that the overhead of CC exceeds a threshold. For example, if the overhead of the tail bits in CC occupies, for example, more than 30% of all overhead, the BLOCK coding manner according to an embodiment of the present invention may be adopted for encoding.


The foregoing description is only a preferred embodiment of the present invention and is not for use in limiting the protection scope thereof. All the modifications, equivalent replacements or improvements in the scope of the present invention's spirit and principles shall be included in the protection scope of the present invention.


Claims
1. A method for coding of an E-DCH Dedicated Physical Control Channel
(E-DPCCH), comprising:
encoding information bits of signalling on an E-DPCCH in a BLOCK coding manner.
2. The method of Claim 1, wherein said encoding the information bits of signalling
comprises:
encoding the information bits of signalling on an E-DPCCH in the BLOCK coding manner if the number of the information bits of signalling on an E-DPCCH is not more than a threshold.
3. The method of Claim 2, wherein the threshold is at most 10 to 12.
4. The method of Claim 1 or 2, wherein said encoding the information bits of signalling comprises:
dividing the information bits of signalling on an E-DPCCH into at least one data block;
encoding the data block.
5. The method of Claim 4, wherein the number of the information bits of signalling
on an E-DPCCH is 10, and the number of the information bits of the data block is 10;
or the number of the information bits of signalling on an E-DPCCH is 12, and the number of the information bits of the data block is 12.
6. The method of Claims 4, wherein said encoding the data block comprises:
encoding the data block with a second-order Reed-Muller encoder; and
said encoding the data block with the second-order Reed-Muller encoder comprises: inputting the data block to be encoded into the second-order Reed-Muller encoder; calculating output codeword bits according to the following formula:


wherein i is the sequence number of the output codeword bits, N is the bit number of the data block to be encoded, n=0, 1, 2, 3 ...N-l, an is the n-th bit of the data block to be encoded, Mi, n is the i-th value of the n-th basic sequence, and bi is the i-th bit of the output codeword bits.
7. The method of Claim 6, wherein the number of the output codeword bits is 32, the
method further comprising:
selecting 30 bits from 32 output codeword bits as the codeword of the information bits.
8. An apparatus for coding of an E-DCH Dedicated Physical Control Channel
(E-DPCCH), comprising:
a unit for encoding information bits of signalling on an E-DPCCH in a BLOCK coding manner.
9. The apparatus of Claim 8, wherein the unit comprises:
a module for dividing the information bits of signalling on an E-DPCCH into at least one data block;
a module for encoding the data block in the BLOCK coding manner.
10. The apparatus of Claim 9, wherein the module for encoding the data block in a
BLOCK coding manner comprises one or a plurality of BLOCK encoders, used for
encoding the data blocks consisting of different numbers of information bits in a BLOCK
coding manner; and said BLOCK encoder is a second-order Reed-Muller encoder.


Documents:

1219-chenp-2007 amended claims 08-07-2011.pdf

1219-CHENP-2007 AMENDED CLAIMS 07-01-2011.pdf

1219-CHENP-2007 AMENDED PAGES OF SPECIFICATION 08-07-2011.pdf

1219-CHENP-2007 CORRESPONDENCE 30-08-2010.pdf

1219-CHENP-2007 CORRESPONDENCE OTHERS 08-07-2011.pdf

1219-chenp-2007 form-3 08-07-2011.pdf

1219-chenp-2007 form-3 07-01-2011.pdf

1219-CHENP-2007 EXAMINATION REPORT REPLY RECIEVED 07-01-2011.pdf

1219-CHENP-2007 POWER OF ATTORNEY 07-01-2011.pdf

1219-chenp-2007-abstract.pdf

1219-chenp-2007-claims.pdf

1219-chenp-2007-correspondnece-others.pdf

1219-chenp-2007-description(complete).pdf

1219-chenp-2007-drawings.pdf

1219-chenp-2007-form 1.pdf

1219-chenp-2007-form 18.pdf

1219-chenp-2007-form 3.pdf

1219-chenp-2007-form 5.pdf

1219-chenp-2007-pct.pdf


Patent Number 248445
Indian Patent Application Number 1219/CHENP/2007
PG Journal Number 29/2011
Publication Date 22-Jul-2011
Grant Date 15-Jul-2011
Date of Filing 23-Mar-2007
Name of Patentee HUAWEI TECHNOLOGIES CO., LTD
Applicant Address HUAWEI ADMINISTRATION BUILDING, BANTAIN LONGGANG DISTRICT, SCENZHEN, GUANGDONG 518129, CHINA
Inventors:
# Inventor's Name Inventor's Address
1 HUANG, XINYE HUAWEI ADMINISTRATION BUILDING, BANTAIN LONGGANG DISTRICT, SCENZHEN, GUANGDONG 518129, CHINA
2 XU, LIANG, HUAWEI ADMINISTRATION BUILDING, BANTAIN LONGGANG DISTRICT, SCENZHEN, GUANGDONG 518129, CHINA
3 ZHU, XUEQING HUAWEI ADMINISTRATION BUILDING, BANTAIN LONGGANG DISTRICT, SCENZHEN, GUANGDONG 518129, CHINA
4 CAO, AIJUN HUAWEI ADMINISTRATION BUILDING, BANTAIN LONGGANG DISTRICT, SCENZHEN, GUANGDONG 518129, CHINA
PCT International Classification Number H04B7/26
PCT International Application Number PCT/CN2005/001486
PCT International Filing date 2005-09-19
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 200410078034.9 2004-09-20 China