AU2010200334B2 - Generation of user equipment identification - Google Patents
Generation of user equipment identification Download PDFInfo
- Publication number
- AU2010200334B2 AU2010200334B2 AU2010200334A AU2010200334A AU2010200334B2 AU 2010200334 B2 AU2010200334 B2 AU 2010200334B2 AU 2010200334 A AU2010200334 A AU 2010200334A AU 2010200334 A AU2010200334 A AU 2010200334A AU 2010200334 B2 AU2010200334 B2 AU 2010200334B2
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- AU
- Australia
- Prior art keywords
- wcdma
- scrambling sequence
- specific scrambling
- user specific
- scch
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Links
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
- H03M13/23—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using convolutional codes, e.g. unit memory codes
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/63—Joint error correction and other techniques
- H03M13/635—Error control coding in combination with rate matching
- H03M13/6362—Error control coding in combination with rate matching by puncturing
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6522—Intended application, e.g. transmission or communication standard
- H03M13/653—3GPP HSDPA, e.g. HS-SCCH or DS-DSCH related
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0067—Rate matching
- H04L1/0068—Rate matching by puncturing
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Probability & Statistics with Applications (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Error Detection And Correction (AREA)
Abstract
A base station for use in a code division multiple access communication system, the base station including: 5 circuitry configured to process a user equipment identification (UE ID) by Y2 rate convolutionally encoding the UE ID to produce a code used by the base station for scrambling a high speed shared control channel (HS-SCCH), wherein the base station is configured to transmit a wireless signal, the wireless signal providing the user equipment with payload data carried on a high 10 speed physical downlink shared channel (HS-PDSCH), the HS-PDSCH being associated with the HS-SCCH
Description
Fool S0onoz 20 Reguaton 32(2) AUSTRALIA Patents Act 1990 ORIGINAL COMPLETE SPECIFICATION STANDARD PATENT Application Number: Lodged: Invention Title: Generation of user equipment identification The following statement is a full description of this invention, including the best method of performIng it known to me / us: P11AHAU/1107 I GENERATION OF USER EQUIPMENT IDENTIFICATION SPECIFIC SCRAMBLING CODE FOR THE HIGH SPEED SHARED CONTROL CHANNEL BACKGROUND The present invention relates to wireless communication systems. More 5 particularly, the present invention relates to user equipment identification specific scrambling sequences for high speed shared control channels (HS-SCCH). A high speed downlink packet access (HSDPA) is proposed for wideband code division multiple access communication systems. HSDPA allows for high downlink data rates to support multimedia services. 10 To support HSDPA, high speed shared control channels (HS-SCCHs) are used. The HS-SCCHs are used to signal vital control information to the user equipments (UEs). Each HS-SOCH has two parts, referred to as Part-1 and Part 2. Part-1 carries time critical information needed by the UE. This information includes the channelization code set and the modulation type used by the high 15 speed physical downlink shared control channel (HS-PDSCH) which carries the HSDPA payload. This information is vital to support HSDPA, since HSDPA uses adaptive modulation and coding (AMC). To obtain its Part-1 information, each HSDPA UE monitors up to four HS SCCHs for its information. The information for a particular UE is distinguished 20 from other UEs by its UE identification (UE ID) specific scrambling sequence. The UE processes each monitored HS-SCCH with its UE ID specific scrambling sequence to detect the HS-SCCH intended for the UE. After processing, the UE determines on which HS-SCCH, if any, information was carried using its scrambling sequence. The UE descrambles the data carried on Part-1 of its HS 25 SCCH using its scrambling sequence. Until recently, a 10 bit UE ID was used as the basis for the UE ID specific scrambling sequence. In this case, this UE ID was converted into a 40 bit scrambling sequence. To turn the 10 bit UE ID into the 40 bit UE ID specific scrambling sequence, the 10 bit UE ID is processed by a Reed-Muller block to 30 produce a 32 bit code. The first 8 bits of the produced code are repeated and appended onto the back of the 32 bit code to produce a 40 bit code. Although it is proposed to extend the UE ID length to 16 chips, the current proposal for the HS-SCCHs uses a 10 bit UE ID. This UE ID is converted into a 2 40 bit scrambling sequence. To turn the 10 bit UE ID into the 40 bit scrambling sequence, the 10 bit UE ID is processed by a Reed-Muller block to produce a 32 bit code. The first 8 bits of the produced code are repeated and appended onto the back of the 32 bit code to produce a 40 bit code. 5 To reduce the occurrence of false detections, it is desirable to have good separation between the produced scrambling codes for each UE ID. Accordingly, it is desirable to have alternate approaches to producing scrambling codes. SUMMARY OF THE INVENTION A code is produced for use in scrambling or descrambling data associated 10 with a high speed shared control channel (HS-SSCH) for a particular user equipment. A user identification of the particular user equipment includes L bits. A rate convolutional encoder processes at least the bits of the user identification by a rate convolutional code to produce the code. According to a first aspect the present Invention provides a wideband code 15 division multiple access (WCDMA) user equipment (UE) including: circuitry in the WCDMA UE configured to process a high speed shared control channel (HS SCCH); and circuitry in the WCDMA UE configured to recover payload data from a high speed physical downlink shared channel (HS-PDSCH) associated with the HS-SCCH in response to the HS-SCCH including bits, wherein the bits are a 20 result of a combining of a user specific scrambling sequence associated with the UE with control information, and wherein the user specific scrambling sequence is a result of a 1/2 rate convolutional encoding of a UE identification (ID). According to a further aspect the present invention provideS a method for use in a wideband code division multiple access (WCDMA) user equipment 25 (UE), the method including: processing a high speed shared control channel (HS-SCCH); and recovering payload data from a high speed physical downlink shared channel (HS-PDSCH) associated with the HS-SCCH in response to the HS-SCCH including bits, wherein the bits are a result of a combining of a user specific scrambling sequence associated with the UE with control information, 30 and wherein the user specific scrambling sequence is a result' of a 1/2 rate convolutional encoding of a UE identification (ID).
3 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1A is a preferred diagram of a circuit for producing a code associated with a particular user for a HS-SCCH. Figure 1B is a diagram of a rate matching block used in conjunction with 5 Figure 1A. Figure 2A is a preferred diagram of a circuit for producing a code associated with a user identification of 16 bits. Figure 2B is a diagram of a rate matching block used in conjunction with Figure 2A. 10 Figure 3 is a simplified user equipment using the UE ID specific scrambling code. Figure 4 is a simplified base station using the UE ID specific scrambling code. DESCRIPTION OF PREFERRED EMBODIMENT 15 Although the preferred embodiments are described in conjunction with the preferred application of the invention for use with the HSDPA of the third generation partnership project (3GPP) wideband code division multiple access (W-CDMA) communication system, the invention can be applied to other code 20 4 division multiple access communication systems. Figures 1A and 1B are diagrams of a preferred UE ID specific scrambling sequence circuit. A UE ID, XUE, of length L is input into the circuit, L can be any length, such as 6 bits, 10 bits, 16 bits, etc. The UE ID, XUF = {XUE1, ... , XUEL , is input into a V? rate 5 convolutional encoder 10 as shown in Figure 1A. Along with the UE ID, extra bits, such as zeros, may be added to the end of the input string to extend the length of the input string and, accordingly, the output string. The use of a Y2 rate convolutional encoder 10 provides for a high level of code separation between the output strings produced by different UE IDs. Additionally, current proposed 3GPP 10 W-CDMA communication systems utilize a M/ rate convolutional encoder 10 for a forward error correction (FEC) technique. Accordingly, no additional hardware is required to generate the convolutionally encoded UE ID specific scrambling sequence. After encoding, based on the length of the output string, a rate matching stage 12 may be added to puncture bits to obtain a desired string 15 length. Figures 2A and 2B are diagrams of preferred UE ID specific scrambling sequence circuit for a preferred UE ID codes of length 16, L=16. The 16 bit UE ID, XUE = {XUE1, -, XUE 1 6), is input into a %/ rate convolutional encoder 14 along with eight zero bits appended onto the end of the input string. As a result, the 20 input string is XuE1, .; XUE 1 6; 0, 0, 0, 0, 0, 0, 0, 0. After being processed by the % rate convolutional encoder 14, the output code is 48 bits in length, Cus = (CuE1, CUE48} To reduce the length of the code to a preferred length of 40 bits, eight bits are preferably punctured. Figure 26 illustrates the rate matching stage 15 to 25 perform the puncturing. After the rate matching stage 16, the effective length of the scrambling code is 40 bits. Figure 4 is a simplified diagram of a user equipment descrambling a HS SCCH using the UE ID specific scrambling code. The LIE ID scrambling code is mixed, such as by exclusive-cr gate 16, with the received HS-SCCH for use in 30 recovering the encoded HS-SOCH data. Figure 3 is a simplified diagram of a base station scrambling encoded data with the UE ID specific scrambling code for transfer over the HS-SCCH, The encoded data is mixed with the UE ID scrambling code, such as by an exclusive- 5 or gate 20, for a particular user. The scrambled data is used to produce the HS SCCH for transfer to the particular user.
Claims (16)
1. A wideband code division multiple access (WCDMA) user equipment (UE) including: circuitry in the WCDMA UE configured to process a high speed shared control channel (HS-SCCH); and circuitry in the WCDMA UE configured to recover payload dbta from a high speed physical downlink shared channel (HS-PDSCH) associated with the HS-SCCH in response to the HS-SCCH including bits, wherein the bits are a result of a combining of a user specific scrambling sequence associated with the UE with control information, and wherein the user specific scrambling sequence is a result of a 1/2 rate convolutional encoding of a UE identification (ID).
2. The WCDMA UE of claim 1 wherein the control information includes channelization and modulation information of the HS-PDSCH.
3. The WCDMA UE of claim 1 wherein the user specific scrambling sequence is a result of rate matching the 1/2 rate convolutional encoded UE ID.
4. The WCDMA UE of claim 1 wherein the control i information is convolutionally encoded.
5. The WCDMA UE of claim 1 wherein the payload data of the associated HS-PDSCH is not recovered if the bits were not a result of combining the user specific scrambling sequence associated with the UE with the control information.
6. The WCDMA UE of claim 1 including circuitry in the WCDMA UE configured to produce the user specific scrambling sequence.
7. The WCDMA UE of claim 6 wherein the circuitry in the WCDMA UE configured to produce the user specific scrambling sequence includes a 1/2 rate convolutional encoder. 7
8. A method for use in a wideband code division multiple access (WCDMA) user equipment (UE), the method including: processing a high speed shared control channel (HS-SCCH); and recovering payload data from a high speed physical downlink shared channel (HS-PDSCH) associated with the HS-SCCH in response to the HS-SCCH including bits, wherein the bits are a result of a combining of a user specific scrambling sequence associated with the UE with control information, and wherein the user specific scrambling sequence is a result of a 1/2 rate convolutional encoding of a UE identification (ID).
9. The method of claim 8 wherein the control information includes channelization and modulation information of the HS-PDSCH.
10. The method of claim 8 wherein the user specific scrambling sequence is a result of rate matching the 1/2 rate convolutional encoded UE ID.
11. The method of claim 8 wherein the control information is convolutionally encoded.
12. The method of claim 8 wherein the payload data of the associated HS-PDSCH is not recovered if the bits were not a result of combining the user specific scrambling sequence associated with the UE with the control information.
13. The method of claim 8 including producing the user specific scrambling sequence.
14. The method of claim 13 wherein the user specific scrambling sequence is produced using a 1/2 rate convolutional encoder.
15. A wideband code division multiple access (WCDMA) user equipment (UE) according to claim 1 and substantially as herein described with reference to the accompanying drawings. 8
16. A method for use in a wideband code division multiple access (WCDMA) user equipment (UE) according to claim 8 and substantially as herein described with reference to the accompanying drawings. INTERDIGITAL TECHNOLOGY CORPORATION WATERMARK PATENT & TRADE MARK ATTORNEYS P24811AU03
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2010200334A AU2010200334B2 (en) | 2002-05-07 | 2010-01-29 | Generation of user equipment identification |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60/378,509 | 2002-05-07 | ||
| US60/378,170 | 2002-05-13 | ||
| US10/187,640 | 2002-07-01 | ||
| AU2003234512A AU2003234512A1 (en) | 2002-05-07 | 2003-05-05 | Generation of user equipment identification specific scrambling code for the high speed shared control channel |
| AU2007231897A AU2007231897B2 (en) | 2002-05-07 | 2007-11-09 | Generation of user equipment identification specific scrambling code for the high speed shared control channel |
| AU2010200334A AU2010200334B2 (en) | 2002-05-07 | 2010-01-29 | Generation of user equipment identification |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007231897A Division AU2007231897B2 (en) | 2002-05-07 | 2007-11-09 | Generation of user equipment identification specific scrambling code for the high speed shared control channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2010200334A1 AU2010200334A1 (en) | 2010-03-25 |
| AU2010200334B2 true AU2010200334B2 (en) | 2011-08-25 |
Family
ID=38009184
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007201387A Ceased AU2007201387B2 (en) | 2002-05-07 | 2007-03-29 | Generation of user equipment identification specific scrambling code for the high speed shared control channel |
| AU2007231897A Ceased AU2007231897B2 (en) | 2002-05-07 | 2007-11-09 | Generation of user equipment identification specific scrambling code for the high speed shared control channel |
| AU2010200335A Ceased AU2010200335B2 (en) | 2002-05-07 | 2010-01-29 | Generation of user equipment identification |
| AU2010200334A Ceased AU2010200334B2 (en) | 2002-05-07 | 2010-01-29 | Generation of user equipment identification |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007201387A Ceased AU2007201387B2 (en) | 2002-05-07 | 2007-03-29 | Generation of user equipment identification specific scrambling code for the high speed shared control channel |
| AU2007231897A Ceased AU2007231897B2 (en) | 2002-05-07 | 2007-11-09 | Generation of user equipment identification specific scrambling code for the high speed shared control channel |
| AU2010200335A Ceased AU2010200335B2 (en) | 2002-05-07 | 2010-01-29 | Generation of user equipment identification |
Country Status (1)
| Country | Link |
|---|---|
| AU (4) | AU2007201387B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8483215B2 (en) * | 2011-11-08 | 2013-07-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for identifying other user equipment operating in a wireless communication network |
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2007
- 2007-03-29 AU AU2007201387A patent/AU2007201387B2/en not_active Ceased
- 2007-11-09 AU AU2007231897A patent/AU2007231897B2/en not_active Ceased
-
2010
- 2010-01-29 AU AU2010200335A patent/AU2010200335B2/en not_active Ceased
- 2010-01-29 AU AU2010200334A patent/AU2010200334B2/en not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| 3GPP TS 25.212 V5.0.0 (2002) "Multiplexing and channel coding (FDD) 5 March 2002 * |
| Motorola:"Performance of the HS-SCCH" 8 April 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2010200335A1 (en) | 2010-02-18 |
| AU2007231897A1 (en) | 2007-11-29 |
| AU2010200335B2 (en) | 2013-03-14 |
| AU2010200334A1 (en) | 2010-03-25 |
| AU2007231897B2 (en) | 2011-02-24 |
| AU2007201387A1 (en) | 2007-04-19 |
| AU2007201387B2 (en) | 2009-10-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |