CN101478765B - Adaptive modulation encoding method used for TD-SCDMA network high speed downlink packet access - Google Patents
Adaptive modulation encoding method used for TD-SCDMA network high speed downlink packet access Download PDFInfo
- Publication number
- CN101478765B CN101478765B CN200810032205.2A CN200810032205A CN101478765B CN 101478765 B CN101478765 B CN 101478765B CN 200810032205 A CN200810032205 A CN 200810032205A CN 101478765 B CN101478765 B CN 101478765B
- Authority
- CN
- China
- Prior art keywords
- speed downlink
- channel
- high speed
- pdsch channel
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
A adaptive modulation and coding method for the high speed downlink packet access of TD-SCDMA and comprises the following procedures: a modulation coding scheme control module is arranged in a base station in mobile network or in a wireless controller, and a HS-PDSCH channel measurement module and a measurement signal reporting module are arranged at a terminal; the mobile network transmits a high speed downlink packet access control command to the terminal through the HS-SCCH channel; the terminal HS-PDSCH channel measurement module feeds back the obtained signal to noise ratio of HS-PDSCH channel and the ACK-NACK information to the mobile network through an HS-SICH channel; the modulation coding scheme control module makes calculation to get a modulation coding mode according to the signal to noise ratio of HS-PDSCH channel and the ACK-NACK information and distributes high speed downlink packet access data to the terminal through the HS-PDSCH channel. The adaptive modulation and coding method for the high speed downlink packet access of TD-SCDMA has the advantages of raising the compensation of the adaptive modulation and coding technique to the weakness of channel, raising the performance of high speed downlink packet access system, being convenient for the optimization and upgrading of later algorithm, reducing the demand to the competence of terminal and being convenient for the rapid popularization of high speed downlink packet access.
Description
[technical field]
The present invention relates to the technology of TD-SCDMA networking later stage raising downlink capacity and data service rate, specifically, is a kind of Adaptive Modulation and Coding (AMC) method for TD-SCDMA network high-speed downlink grouping access (HSDPA).
[background technology]
High speed downlink packet access is a kind of modulation and demodulation algorithm that 3GPP proposes in order to meet the asymmetric demand of up/down row data service in R5 agreement, it can be in the situation that not changing existing TD-SCDMA R99 network configuration, downstream data traffic speed is brought up to single carrier 2.8Mbps left and right, is a kind of important technology that the TD-SCDMA networking later stage improves downlink capacity and data service rate.
High speed downlink packet access adopts adaptive modulation and coding (AMC) technology to compensate wireless channel.The basic principle of adaptive modulation and coding: terminal is by up HS-SICH channel feedback cqi (CQI), base station (Node B) is adjusted modulation technique and coded system according to the cqi of feedback, thereby it is weak to overcome wireless channel.
For different terminals type, agreement has defined respectively feedback channel quality indication (CQI) and modulating-coding form comprises the relation between modulation system, transmission block size etc.
At present in 3GPP R5 network, adaptive modulation coding method is to calculate transmission block size and modulation system by terminal, by feedback channel quality, indicate and report quality of wireless channel, mobile network receives after channel quality indication, according to channel quality indicated value, regulate high speed downlink packet access modulation coding mode, i.e. down high speed downlink grouped access rate has just been determined in the channel quality of terminal to report indication.Because TD-SCDMA system has adopted intelligent antenna technology to dedicated channel, terminal is generally that HS-PDSCH channel is measured and according to HS-PDSCH channel measured value, transmission block size and modulation system is calculated, so the method has the following disadvantages:
1), because terminal capability is limited, therefore, in calculating the process of transmission block size and modulation system, cannot guarantee accuracy and the promptness of algorithm.Be that complicated algorithm can obtain preferably transmission block size and modulation system, still, due to the restriction of hardware capabilities, terminal will expend a large amount of time; And easy algorithm cannot obtain preferably transmission block size and modulation system in the situation that having reduced amount of calculation.
2) wireless environment is complicated and changeable, therefore sets up single HS-PDSCH channel signal to noise ratio and the corresponding relation between transmission block size and modulation system, cannot guarantee the optimum of this corresponding relation under various wireless scenes.
3) terminal kind is numerous, causes transmission block size and modulation system computational methods to have otherness, is unfavorable for the raising of whole system performance.
[summary of the invention]
The present invention proposes a kind of adaptive modulation coding method for TD-SCDMA network high-speed downlink grouping access, the accuracy facing in the time of can effectively solving terminal generation transmission block size and modulation system and the contradiction of promptness are brought larger lifting to high speed downlink packet access overall performance simultaneously.
Technical scheme of the present invention is: a kind of adaptive modulation coding method for TD-SCDMA network high-speed downlink grouping access, and its step has:
1) modulating-coding Decision Control module is set in mobile network's base station or in radio network controller, in end, HS-PDSCH channel measurement module and measuring-signal reporting module is set;
2) mobile network issues high speed downlink packet access control signaling by HS-SCCH channel to terminal;
3) terminal HS-PDSCH channel measurement module is measured HS-PDSCH channel, and obtain HS-PDSCH channel signal to noise ratio, measuring-signal reporting module by HS-SICH channel by the HS-PDSCH channel signal to noise ratio measuring and ACK/NACK message feedback to mobile network;
4) modulating-coding Decision Control module reports according to HS-SICH channel HS-PDSCH channel signal to noise ratio and ACK/NACK message calculate modulation coding mode;
5) base station, according to the modulation coding mode calculating, issues high speed descending grouping access data by HS-PDSCH channel to terminal.
Described HS-SICH channel comprises two parts: be respectively ACK/NAK and HS-PDSCH channel signal to noise ratio, wherein ACK/NAK comprises 1 bit, and HS-PDSCH channel signal to noise ratio comprises 7 bit.
The method desired parameters of described calculating modulation coding mode obtains by analog simulation or test.
Feature of the present invention is that terminal do not calculate transmission block size and modulation system, only by HS-SICH channel, the HS-PDSCH channel signal to noise ratio measuring is fed back to base station; Mobile network, locate to increase modulating-coding Decision Control module simultaneously, this module is according to the pilot channel signal to noise ratio of HS-SICH channel feedback, in conjunction with factors such as the descending error rate, system available resources, directly calculate modulation coding mode, and use this modulation coding mode to carry out the transmission of downlink data.
The advantage of technical scheme is: only change existing channel, and less to systematic influence; Mobile network, locate to calculate modulation coding mode, can greatly improve Adaptive Modulation and Coding technology to the weak compensate function of channel, thereby overcome the above-mentioned defect of prior art, improve high speed descending grouping access system performance, optimization and the upgrading of the later stage algorithm of being more convenient for; Reduce the requirement to terminal capability, also reduced the R&D costs of terminal thereupon, be conducive to the universal rapidly of high speed downlink packet access; Skip over channel quality and indicated this intermediate quantity, simplified system configuration.
[accompanying drawing explanation]
Fig. 1 is adaptive modulation coding method schematic flow sheet of the present invention.
Fig. 2 is HS-DPCCH channel architecture figure of the present invention.
[embodiment]
Below in conjunction with accompanying drawing, describe embodiments of the present invention in detail.
Consult the Adaptive Modulation and Coding shown in Fig. 1 (AMC) method flow, in mobile network's base station 2 (Node B), modulating-coding Decision Control module 21 is set; Or, as represented in dotted line in figure, in mobile network's the interior modulating-coding Decision Control module 21 that arranges of radio network controller 3, with packet interface, be connected with base station 2 (Node B).In terminal 1 (UE), locate to arrange HS-PDSCH channel measurement module 11 and measuring-signal reporting module 12.
Owing to being subject to the restriction of hardware capabilities, when calculating transmission block size and modulation system, terminal cannot be taken into account accuracy and the promptness of calculating.And mobile network appliance will be far superior to terminal in hardware capabilities, therefore, the function setting of calculating transmission block size and modulation system is comparatively reasonable at mobile network place.
Mobile network's base station 2 issues high speed downlink packet access control signaling by HS-SCCH channel to terminal 1.11 pairs of HS-PDSCH channels of HS-PDSCH channel measurement module of terminal (UE) are measured, and obtain HS-PDSCH channel signal to noise ratio, measuring-signal reporting module by HS-SICH channel by the HS-PDSCH channel signal to noise ratio measuring and ACK/NACK message feedback to mobile network.The HS-PDSCH channel signal to noise ratio that modulating-coding Decision Control module 21 reports according to HS-SICH channel and ACK/NACK message, simultaneously in conjunction with factors such as the descending error rates, directly calculate modulation coding mode, computational methods desired parameters can obtain by analog simulation or test.Base station 2, according to the modulation coding mode calculating, issues high speed descending grouping access data by HS-PDSCH channel to terminal 1.
As shown in Figure 2, described HS-SICH channel comprises two parts: be respectively ACK/NAK and HS-PDSCH channel signal to noise ratio, wherein ACK/NAK comprises 1 bit, HS-PDSCH channel signal to noise ratio comprises 7 bit, such design does not affect the original spread spectrum mode of HS-SICH channel and coded system, but changed the message content that terminal 1 reports, terminal 1 is no longer calculated transmission block size and modulation system, only reports HS-PDSCH channel signal to noise ratio and ACK/NACK message.
Claims (3)
1. for an adaptive modulation coding method for TD-SCDMA network high-speed downlink grouping access, its step has:
1) modulating-coding Decision Control module is set in mobile network's base station or in radio network controller, in end, HS-PDSCH channel measurement module and measuring-signal reporting module is set;
2) mobile network issues high speed downlink packet access control signaling by HS-SCCH channel to terminal;
3) terminal HS-PDSCH channel measurement module is measured HS-PDSCH channel, and obtain HS-PDSCH channel signal to noise ratio, measuring-signal reporting module by HS-SICH channel by the HS-PDSCH channel signal to noise ratio measuring and ACK/NACK message feedback to mobile network;
4) modulating-coding Decision Control module reports according to the descending error rate, system available resources, HS-SICH channel HS-PDSCH channel signal to noise ratio and ACK/NACK message calculate modulation coding mode;
5) base station, according to the modulation coding mode calculating, issues high speed descending grouping access data by HS-PDSCH channel to terminal.
2. the adaptive modulation coding method for the grouping access of TD-SCDMA network high-speed downlink according to claim 1, it is characterized in that described HS-SICH channel comprises two parts: be respectively ACK/NAK and HS-PDSCH channel signal to noise ratio, wherein ACK/NAK comprises 1 bit, and HS-PDSCH channel signal to noise ratio comprises 7 bit.
3. the adaptive modulation coding method for TD-SCDMA network high-speed downlink grouping access according to claim 1, is characterized in that the method desired parameters of described calculating modulation coding mode obtains by analog simulation or test.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810032205.2A CN101478765B (en) | 2008-01-02 | 2008-01-02 | Adaptive modulation encoding method used for TD-SCDMA network high speed downlink packet access |
| PCT/CN2008/001825 WO2009082879A1 (en) | 2008-01-02 | 2008-10-30 | Method and device of adaptive modulation and coding of high speed downlink packet access |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810032205.2A CN101478765B (en) | 2008-01-02 | 2008-01-02 | Adaptive modulation encoding method used for TD-SCDMA network high speed downlink packet access |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101478765A CN101478765A (en) | 2009-07-08 |
| CN101478765B true CN101478765B (en) | 2014-03-12 |
Family
ID=40839384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810032205.2A Active CN101478765B (en) | 2008-01-02 | 2008-01-02 | Adaptive modulation encoding method used for TD-SCDMA network high speed downlink packet access |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101478765B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867456B (en) * | 2010-06-18 | 2015-04-01 | 中兴通讯股份有限公司 | Updating method of modulation coding way and base station |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6574211B2 (en) * | 1997-11-03 | 2003-06-03 | Qualcomm Incorporated | Method and apparatus for high rate packet data transmission |
| CN1173502C (en) * | 2001-09-06 | 2004-10-27 | 华为技术有限公司 | Self adaptable adjusting method for modulating code mode |
| DE60205014T2 (en) * | 2002-02-14 | 2005-12-29 | Matsushita Electric Industrial Co., Ltd., Kadoma | Method for controlling the data rate in a wireless packet data communication system, transmitter and receiver for its use |
| US7352722B2 (en) * | 2002-05-13 | 2008-04-01 | Qualcomm Incorporated | Mitigation of link imbalance in a wireless communication system |
-
2008
- 2008-01-02 CN CN200810032205.2A patent/CN101478765B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101478765A (en) | 2009-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101494515B (en) | Down self-adapting modulation coding method and base station of OFDM system | |
| CN101141226B (en) | Modulation coding state regulation means, self-adaptive coding modulation method and system | |
| CN101635588B (en) | Power control method and device | |
| CN101753274B (en) | Resource scheduling method, system and equipment in time division duplex high speed downlink packet access (TDD HSDPA) system | |
| CN102377508B (en) | Adaptive modulation and coding method and adaptive modulation and coding device | |
| CN101197611B (en) | Method, system and device for data transmission | |
| CN102611666B (en) | Outer loop link adaptive implementation method and device | |
| CN102984794B (en) | Method, system, base station and terminal that a kind of multicast system data are sent | |
| CN102065534B (en) | Power adjustment method and device | |
| CN101621829B (en) | Method and device for reporting channel quality indicator | |
| CN102394717B (en) | Self-optimizing adjusting method for modulation coding mode selection threshold value | |
| CN101753658A (en) | Method for adjusting terminal temperature, temperature-adjusting device and terminal | |
| CN101621316B (en) | System and method for realizing transmission power control | |
| CN101478364B (en) | Adaptive modulation encoding method used for WCDMA network high-speed downlink packet access | |
| CN100556196C (en) | Definite method of channel quality indication in a kind of high speed descending grouping access system | |
| CN101651516B (en) | Method and system for encoding modulation | |
| CN103067140B (en) | Method and system of control signaling transmission | |
| CN101478765B (en) | Adaptive modulation encoding method used for TD-SCDMA network high speed downlink packet access | |
| CN100512553C (en) | High speed downward grouping cut-in method for base station and correcting method for channel quality instruction | |
| CN101192858A (en) | Method and device for power control in the downlink high-speed data transmission system | |
| CN112153677A (en) | Uplink AMC optimization method for small telephone traffic scene | |
| CN102123508B (en) | Time slot resource allocation method and device | |
| CN101630991A (en) | Time division synchronous code division multiple access terminal and method for determining channel quality instruction | |
| CN101796746B (en) | Method for uplink TBS size determination at NodeB and UE | |
| CN104426628A (en) | Threshold adjusting method and system of modulation coding mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |