CN101478364B - Adaptive modulation encoding method used for WCDMA network high-speed downlink packet access - Google Patents
Adaptive modulation encoding method used for WCDMA network high-speed downlink packet access Download PDFInfo
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- CN101478364B CN101478364B CN200810032206.7A CN200810032206A CN101478364B CN 101478364 B CN101478364 B CN 101478364B CN 200810032206 A CN200810032206 A CN 200810032206A CN 101478364 B CN101478364 B CN 101478364B
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Abstract
The invention discloses an adaptive modulation coding method used for high-speed downlink packet access (HSDPA) of a wideband code division multiple access (WCDMA) network. The method comprises the following steps: setting a modulation coding decision control module inside a base station or a wireless network controller of a mobile network, and setting a high-speed physical downlink shared channel (HS-PDSCH) measurement module and a measurement signal report module at a terminal; allowing the mobile network to issue a HSDPA control signaling to the terminal via a HS-PDSCH; allowing the HS-PDSCH measurement module of the terminal to feedback the measured pilot channel reception level, the pilot channel signal-to-noise ratio and the hybrid automatic repeat request-acknowledgement (HARQ-ACK) message via a high-speed dedicated physical control channel (HS-DPCCH); and allowing the modulation coding decision control module to calculate the modulation coding mode according to the pilot channel reception level, the pilot channel signal-to-noise ratio and the HARQ-ACK message and to transmit the HSDPA data to the terminal via the HS-PDSCH. The adaptive modulation coding method enhances the fading channel-compensating function of the adaptive modulation coding technique, improves the HSDPA system performance, facilitates the optimization and upgrading of the next algorithms, reduces the requirement for terminal capability, and promotes the quick generalization of HSDPA.
Description
[technical field]
The present invention relates to the technology that WCDMA network improves downlink capacity and data service rate, specifically, is a kind of Adaptive Modulation and Coding (AMC) method for WCDMA 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, in the situation that not changing existing WCDMA R99 network configuration, bring up to 10Mbps left and right downstream data traffic speed.This technology is a kind of important technology that 3G network is built later stage raising downlink capacity and data service rate.
High speed downlink packet access adopts adaptive modulation and coding (AMC) technology to compensate wireless channel: terminal is by up HS-DPCCH 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 and transmission block size.
Channel quality indicated value is calculated by terminal measurement, and the measurement capability that has defined terminal in agreement 25.215 requires as follows:
1) pilot channel incoming level (CPICH RSCP)
2) pilot channel signal to noise ratio (CPICH Ec/No)
3) transmission channel Block Error Rate (Transport Channel BLER)
Undefined channel quality indication calculating method in 3GPP, generally terminal generates channel quality indicated value according to the pilot channel signal to noise ratio measuring.
Above-mentioned technology has the following disadvantages:
1), because terminal capability is limited, therefore, in calculating the process of channel quality indication, cannot guarantee accuracy and the promptness of algorithm.Be that complicated algorithm can obtain preferably channel quality indicated value, still, due to the restriction of hardware capabilities, terminal will expend a large amount of time; And easy algorithm cannot obtain preferably channel quality indicated value in the situation that having reduced amount of calculation.
2) wireless environment is complicated and changeable, therefore sets up the corresponding relation between single pilot channel signal to noise ratio and channel quality indication, cannot guarantee the optimum of this corresponding relation under various wireless scenes.
3) terminal kind is numerous, causes channel quality indication calculating method 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 and Coding (AMC) method for WCDMA network high-speed downlink grouping access (HSDPA), the accuracy facing in the time of can effectively solving the indication of terminal generation channel quality 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 WCDMA 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 pilot channel signal to noise ratio and pilot channel incoming level measured value, by HS-DPCCH channel by the pilot channel signal to noise ratio measuring, pilot channel incoming level measured value and HARQ-ACK message feedback to mobile network;
4) modulating-coding Decision Control module reports according to HS-DPCCH channel pilot channel signal to noise ratio, pilot channel incoming level measured value and HARQ-ACK 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-DPCCH channel comprises three parts: be respectively HARQ-ACK, and pilot channel incoming level and pilot channel signal to noise ratio, wherein HARQ-ACK accounts for 10 chips, and pilot channel signal to noise ratio accounts for 10 chips, and pilot channel incoming level accounts for 10 chips.
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 channel quality indication: only, by HS-DPCCH channel, the pilot channel signal to noise ratio measuring and pilot channel incoming level are 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-DPCCH channel feedback and pilot channel incoming level, in conjunction with factors such as the descending error rate, power 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 without adding new physical structure, 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 pilot channel signal to noise ratio and pilot channel incoming level measured value, measuring-signal reporting module 12 by HS-DPCCH channel by the pilot channel signal to noise ratio measuring, pilot channel incoming level measured value and HARQ-ACK message feedback to mobile network.The pilot channel signal to noise ratio that modulating-coding Decision Control module 21 reports according to HS-DPCCH channel, pilot channel incoming level measured value and HARQ-ACK 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-DPCCH channel comprises three parts: be respectively HARQ-ACK, pilot channel incoming level and pilot channel signal to noise ratio, wherein HARQ-ACK accounts for 10 chips, and pilot channel signal to noise ratio accounts for 10 chips, and pilot channel incoming level accounts for 10 chips.Such design does not affect the original spread spectrum mode of HS-DPCCH 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 pilot channel incoming level, pilot channel signal to noise ratio and HARQ-ACK message.
Claims (3)
1. for an adaptive modulation coding method for WCDMA 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 pilot channel signal to noise ratio and pilot channel incoming level measured value, by HS-DPCCH channel by the pilot channel signal to noise ratio measuring, pilot channel incoming level measured value and HARQ-ACK message feedback to mobile network;
4) modulating-coding Decision Control module reports according to HS-DPCCH channel pilot channel signal to noise ratio, pilot channel incoming level measured value and HARQ-ACK message, calculate modulation coding mode in conjunction with the descending error rate, power resource;
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 WCDMA network high-speed downlink according to claim 1, it is characterized in that described HS-DPCCH channel comprises three parts: be respectively HARQ-ACK, pilot channel incoming level and pilot channel signal to noise ratio, wherein HARQ-ACK accounts for 10 chips, pilot channel signal to noise ratio accounts for 10 chips, and pilot channel incoming level accounts for 10 chips.
3. the adaptive modulation coding method for WCDMA 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.
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| CN200810032206.7A CN101478364B (en) | 2008-01-02 | 2008-01-02 | Adaptive modulation encoding method used for WCDMA 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 |
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| CN101990315B (en) * | 2009-08-04 | 2013-08-07 | 中兴通讯股份有限公司 | Method and equipment for adjusting downlink modulation coding mode and multi-input multi-output mode |
| US9036608B2 (en) * | 2012-11-09 | 2015-05-19 | Telefonaktiebolaget L M Ericsson (Publ) | Adaptive transmission mode switching |
| CN103688482A (en) * | 2013-09-06 | 2014-03-26 | 华为技术有限公司 | A data transmission method, an apparatus and a device |
| CN111835397B (en) * | 2020-05-29 | 2022-04-12 | 北京空间飞行器总体设计部 | Remote sensing satellite encodable adjustment function test method and system |
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| CN1375949A (en) * | 2002-04-28 | 2002-10-23 | 武汉汉网高技术有限公司 | Multiuser downstream grouping transmission quality control method for CDMA communication system |
| CN1708928A (en) * | 2002-11-05 | 2005-12-14 | 西门子公司 | Method for estimating a channel quality |
| CN1893335A (en) * | 2005-07-01 | 2007-01-10 | 上海原动力通信科技有限公司 | Method for supporting multi-stage modulation by controlling high-speed down-converter grouped access system |
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| US7317702B2 (en) * | 2004-07-30 | 2008-01-08 | Lucent Technologies Inc. | Method and apparatus for enhancing performance of channel quality indicator (CQI) channel in wireless communications system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1375949A (en) * | 2002-04-28 | 2002-10-23 | 武汉汉网高技术有限公司 | Multiuser downstream grouping transmission quality control method for CDMA communication system |
| CN1708928A (en) * | 2002-11-05 | 2005-12-14 | 西门子公司 | Method for estimating a channel quality |
| CN1893335A (en) * | 2005-07-01 | 2007-01-10 | 上海原动力通信科技有限公司 | Method for supporting multi-stage modulation by controlling high-speed down-converter grouped access system |
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