CN101499877B - HSDPA medium and high order modulated downlink signaling transmission method for TD-SCDMA system - Google Patents
HSDPA medium and high order modulated downlink signaling transmission method for TD-SCDMA system Download PDFInfo
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- CN101499877B CN101499877B CN2008100333517A CN200810033351A CN101499877B CN 101499877 B CN101499877 B CN 101499877B CN 2008100333517 A CN2008100333517 A CN 2008100333517A CN 200810033351 A CN200810033351 A CN 200810033351A CN 101499877 B CN101499877 B CN 101499877B
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Abstract
The invention discloses a transmitting method of an HSDPA high-order modulating downstream signal of a TD-SCDMA system, overcomes the problem that existing systems can not indicate a high-order modulating way, and adopts the technical proposal that the method comprises the following steps: 1. a sender implements the polarity reversion of a check code that is used for circular redundancy checking of a downstream control channel; 2. a terminal receives a message from the downstream control channel and indicates transmission resource distribution situations of next high-speed downstream sharing channel; 3. the terminal implements channel measurement; 4. the terminal generates channel quality indication according to the resource distribution situations of the high-speed downstream sharing channel in step 2 and the channel measuring result in step 3, and reports the channel quality indication to a base station through a corresponding upstream control channel; 5. high layers of the base station select proper transmission block size and high-order modulating way according to the channel quality indication report of the terminal; and 6. the base station sends control information that contains the high-order modulating way to the terminal through the downstream control channel. The transmitting method of the HSDPA high-order modulating downstream signal of the TD-SCDMA system is applied to the field of mobile communication.
Description
Technical field
The present invention relates to a kind of signal transmission method, relate in particular to a kind of transmission method that utilizes the check code polarity inversion of CRC (CRC) to high order modulation downlink signaling in the TD-SCDMA system HSDPA.
Background technology
Along with increasing of mobile multi-media service, the transmission rate of 3-G (Generation Three mobile communication system) 2Mb/s can not meet the demands, and the mobile communication system that development has bigger capacity and bigger Bit Transmission Rate becomes inevitable.Therefore, WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)), CDMA2000 and TD-SCDMA (Time Division-Synchronous CodeDivision Multiple Access, TD SDMA) all strengthens carrying out technology, with the higher service rate of development, (back three generations's mobile communication) applied business of more B3G is provided.In the 3GPP standard, the HSDPA (High Speed Downlink Packet Access, high speed downlink packet inserts) of WCDMA and TD-SCDMA has been proposed to be applicable to based on the UMTS standard.In the 3GPP2 of another standardization body, similar techniques is also arranged, they are CDMA2000 1X EV-DO and EV-DV.
HSDPA is a kind of enhanced scheme that 3GPP Release 5 proposes, and main purpose is the high speed support to Packet data service, and obtains lower time delay, higher throughput of system and stronger QoS and guarantee.From technical standpoint, HSDPA strengthens air interface by introducing high speed descending sharing channel (HS-DSCH), and strengthens corresponding functional entity in UTRAN.From bottom, mainly be that introducing Adaptive Modulation and Coding (AMC) and H-ARQ (hybrid ARQ) technology increase data throughout.
The HARQ system introduces a FEC subsystem in the ARQ system, be used for correcting the error pattern of frequent appearance to reduce number of retransmissions, promptly in the error correcting capability scope, automatically correct a mistake, exceed the error correction scope and then require transmitting terminal to resend data, this has increased the reliability and the efficiency of transmission of system.That is to say that the channel condition that H-ARQ can adapt to moment automatically provides trickle data rate adjustment, select a suitable modulation and coded system then to obtain according to the channel condition that terminal (UE) is measured or network terminal determines by AMC.AMC according to the change of channel quality condition, adjusts modulation and coded system in the scope of system constraint.In an AMC system, the user who sits pretty (normally those users very near apart from the base station) can be endowed higher modulation and coded system (such as 16QAM and 1/2Turbo encoding rate); And be in user's (normally those are in the user of cell boarder) of unfavorable position, can be endowed lower modulation and coded system (such as QPSK and 1/2Turbo encoding rate).In the AMC system, the base station remains unchanged for each user's transmitted power, for position user preferably, channel condition is good, and system can provide the data service of two-forty to it, increase overall system throughput, and at utmost strengthen the transmittability of Packet data service, improve power system capacity, need to introduce higher code rate and more high-order modulating (as 32QAM, 64QAM, 256QAM).
The high speed business carrying of HSDPA mainly is to realize transmission by high speed descending sharing channel (HS-DSCH), it is the dedicated channel of a HSDPA, and the control information of all relevant bottoms is then shared information channel (HS-SICH) and descending HS-DSCH shared control channel (HS-SCCH) carrying by up HS-DSCH.HS-SCCH is the down control channel of HSDPA special use, is a physical channel, the control information that is used to carry all relevant bottoms.That is to say that terminal receives the data of HS-DSCH and must just can finish under the cooperation of HS-SCCH control information.HS-SCCH is shared by the UE of all HSDPA transfer of data, but to single HS-DSCH Transmission Time Interval (TTI), each HS-SCCH only is a relevant descending control signaling of UE carrying HS-DSCH.
The signaling of HS-SCCH carrying is: spreading code set information (8 bit) x
Ccs, 1, x
Ccs, 2..., x
Ccs, 8, gap information (5 bit) x
Ts, 1, x
Ts, 2..., x
Ts, 5, modulation system information (1 bit) x
Ms, 1, transport block size information (6 bit) x
Tbs, 1, x
Tbs, 2..., x
Tbs, 6, hybrid automatic repeat request process information (3 bit) x
Hap, 1, x
Hap, 2..., x
Hap, 3, redundancy version information (3 bit) x
Rv, 1, x
Rv, 2, x
Rv, 3, new data indication (1 bit) x
Nd, 1, HS-SCCH cyclic sequence number (3 bit) x
Hcsn, 1, x
Hcsn, 2, x
Hcsn, 3, UE identification number (16 bit) x
Ue, 1, x
Ue, 2..., x
Ue, 16
Fig. 1 shows the coding of traditional HS-SCCH information, multiplexing flow process, sees also Fig. 1.
Step S10:HS-SCCH information multiplexing.
In this step,
a
1，a
2...a
8＝x
ccs，1，x
ccs，2...x
ccs，8
a
9，a
10...a
13＝x
ts，1，x
ts，2...x
ts，5
a
14＝x
ms，1
a
15，a
16...a
20＝x
tbs，1，x
tbs，2...x
tbs，6
a
21，a
22，a
23＝x
hap，1，x
hap，2，x
hap，3
a
24，a
25，a
26＝x
rv，1，x
rv，2，x
rv，3
a
27＝x
nd，1
a
28，a
29，a
30＝x
hcsn，1，x
hcsn，2，x
hcsn，3
Step S11: additional CRC is 16 CRC check bit with length and length is that 16 UE identifies x
Ue, 1, x
Ue, 2... x
Ue, 16Carry out mould 2 and add, the sequence that obtains is attached to list entries a
1, a
2... a
AAfter, obtain exporting bit b
1, b
2... b
B
Step S12: chnnel coding, use 1/3 convolutional encoding to input bit b
1, b
2... b
BEncode, obtain exporting bit c
1, c
2... c
c
Step S13: rate-matched, identical with the speed matching method of general service channel, output f
1, f
2... f
R
Step S14:HS-SCCH interweaves, and is identical with the deinterleaving method of general service channel, output v
1, v
2... v
R
Step S15: physical channel segmentation, input bit is divided into two sections, length is 84 and 88 bits, output u
P, 1, u
P, 2... u
P, up
Step S16: the physical channel mapping is mapped to two segment datas respectively on the corresponding physical channel.
From the above, the HSDPA technology of existing TD-SCDMA system has only adopted QPSK and two kinds of modulation systems of 16QAM, so only adopted a bit to indicate modulation system in HS-SCCH.At present in the standard, the HSDPA technology of TD-SCDMA system is only supported two kinds of modulation system QPSK (Quadrature Phase Shift Keying) and 16QAM (16 rank quadrature amplitude modulation), corresponding modulation system indication information also has only 1 bit, can't support the HSDPA of high-order modulating.
Summary of the invention
The objective of the invention is to address the above problem, the transmission method of high order modulation downlink signaling in a kind of TD-SCDMA system HSDPA is provided, overcome the problem that to indicate high-order modulating in the existing system, make it can support 32QAM, 64QAM or the contour contrast system of 256QAM.
Technical scheme of the present invention is: the present invention has disclosed the transmission method of high order modulation downlink signaling in a kind of TD-SCDMA system HSDPA, and this method comprises:
1. transmitting terminal reverses the check code polarity of the CRC of down control channel;
2. terminal receives the message of this down control channel, indicates the resource allocation conditions of next high speed descending sharing channel transmission;
3. terminal is carried out channel measurement;
4. according to the resource allocation conditions of this high speed descending sharing channel of step 2 and the channel measurement result of step 3, terminal produces the channel quality indication, and reports to the base station at corresponding ascending control channel;
5. the high level of base station is selected suitable transmission block size and high-order modulating according to the report of the channel quality indication of terminal;
6. the base station control information that will contain high-order modulating sends to terminal by down control channel.
The transmission method of high order modulation downlink signaling in the above-mentioned TD-SCDMA system HSDPA, wherein, step 2 comprises:
2.1 terminal receives the message of this down control channel;
2.2 terminal is separated the processing of physical process to this down control channel, the control information of extracting this high speed descending sharing channel the check code polarity inversion of this CRC, is obtained the high-order modulating of this high speed descending sharing channel.
The transmission method of high order modulation downlink signaling in the above-mentioned TD-SCDMA system HSDPA, wherein, step 3 comprises:
3.1 terminal receives this high speed descending sharing channel according to the control information of this down control channel on the time interval of distributing;
3.1 terminal is carried out channel measurement to the data of this high speed descending sharing channel;
3.2 terminal is carried out demodulation according to the debud mode information of this down control channel to the data on this high speed descending sharing channel.
The transmission method of high order modulation downlink signaling in the above-mentioned TD-SCDMA system HSDPA, wherein, this high-order modulating comprises: 32QAM, 64QAM, 256QAM.
The present invention contrasts prior art following beneficial effect: the present invention is by in the HSDPA of high order modulation system, modulation beacon information among the existing HS-SCCH is represented high-order modulating in conjunction with the mode of CRC check polarity inversion, realized control to high-order modulating, make HSDPA systems support high contrast system mode, improved system peak transmission rate and band efficiency effectively.
Description of drawings
Fig. 1 is the coding of traditional HS-SCCH information, multiplexing flow chart.
Fig. 2 is the flow chart of the preferred embodiment of high order modulation downlink signaling transmission method in the TD-SCDMA system HSDPA of the present invention.
Fig. 3 is the sub-process figure of step S21 among Fig. 2 embodiment.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Fig. 2 shows the flow process of the preferred embodiment of high order modulation downlink signaling transmission means in the TD-SCDMA system HSDPA of the present invention.Seeing also Fig. 2, is the detailed description to each step in this method below.
Step S20: transmitting terminal reverses the check code polarity of the CRC (CRC) of down control channel (HS-SCCH).
Step S21:UE receives the message of HS-SCCH, indicates the resource allocation conditions of next HS-DSCH transmission.
In this step, UE receives the message of HS-SCCH earlier, then HS-SCCH is separated physical process and handles, and extracts the HS-DSCH control information, the polarity inversion of CRC check sign indicating number, obtains the high-order modulating of HS-DSCH.The high-order modulating here comprises 32QAM, 64QAM, 256QAM.
See also Fig. 3, this step is further divided into:
Step S210:UE receives the message of HS-SCCH.
Step S211:UE separates physical process to HS-SCCH and handles.
Step S212: judge whether the modulation system indication information is 0.If be 0, then enter step S213, if be 1, then enter step S214.
Step S213: the modulation system of obtaining HS-DSCH is QPSK, and flow process finishes.
Step S214: the modulation system of obtaining HS-DSCH is a high-order modulating.
Step S215: judge whether CRC check sign indicating number polarity reverses, if counter-rotating then enter step S216, if nonreversible then enter step S217.
Step S216: the debud mode that obtains HS-DSCH is MQAM (for example 32QAM, 64QAM, 256QAM), and flow process finishes.
Step S217: the debud mode that obtains HS-DSCH is 16QAM, and flow process finishes.
Get back to Fig. 2, step S22:UE carries out corresponding channel measurement.
In this step, UE receives HS-DSCH according to the control information of HS-SCCH earlier on the time interval of distributing, then the data of HS-DSCH are carried out channel measurement, according to the debud mode information of HS-SCCH the data of HS-DSCH is carried out demodulation at last.
Step S23: according to the resource allocation conditions of the HS-DSCH of step S21 and the channel measurement result of step S22, terminal produces channel quality indication (CQI), and reports to the base station at corresponding HS-SCCH.
Step S24: the high level of base station is selected suitable transmission block size and high-order modulating according to the CQI report of terminal.
Step S25: the control information that high-order modulating will be contained in the base station sends to terminal by HS-SCCH.
Inventive point of the present invention is: under the prerequisite that does not change any control information of HS-SCCH, by with the modulation beacon information among the existing HS-SCCH in conjunction with the polarity inversion of CRC check sign indicating number, effectively indicate high-order modulating, realize containing the HSDPA high speed packet service downlink signaling transmission of high-order modulating, improved the transmission performance of system and the utilance of frequency band.
The foregoing description provides to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (3)
1. the transmission method of high order modulation downlink signaling in the TD-SCDMA system HSDPA, this method comprises:
1. transmitting terminal reverses the check code polarity of the CRC of down control channel;
2. terminal receives the message of this down control channel, this down control channel is separated the processing of physical process, extract the control information of this high speed descending sharing channel, the check code polarity inversion of this CRC, obtain the high-order modulating of DSCH Downlink Shared Channel, indicate the resource allocation conditions of next high speed descending sharing channel transmission;
3. terminal is carried out channel measurement;
4. according to the resource allocation conditions of this high speed descending sharing channel of step 2 and the channel measurement result of step 3, terminal produces the channel quality indication, and reports to the base station at corresponding ascending control channel;
5. the high level of base station is selected suitable transmission block size and high-order modulating according to the report of the channel quality indication of terminal;
6. the base station control information that will contain high-order modulating sends to terminal by down control channel.
2. the transmission method of high order modulation downlink signaling in the TD-SCDMA system HSDPA according to claim 1 is characterized in that step 3 comprises:
3.1 terminal receives this high speed descending sharing channel according to the control information of this down control channel on the time interval of distributing;
3.1 terminal is carried out channel measurement to the data of this high speed descending sharing channel;
3.2 terminal is carried out demodulation according to the modulation system information of this down control channel to the data on this high speed descending sharing channel.
3. the transmission method of high order modulation downlink signaling is characterized in that in the TD-SCDMA system HSDPA according to claim 2, and this high-order modulating comprises: 32QAM, 64QAM, 256QAM.
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| CN101848114B (en) * | 2010-04-15 | 2012-10-03 | 华为技术有限公司 | Fault detection method and device |
| KR20140073586A (en) * | 2011-10-31 | 2014-06-16 | 후지쯔 가부시끼가이샤 | Channel quality information calculation method, feedback method, and device |
| WO2014194534A1 (en) | 2013-06-08 | 2014-12-11 | 华为技术有限公司 | Channel quality indicator and notification method and device for modulation and coding scheme |
| US10757726B2 (en) * | 2013-12-27 | 2020-08-25 | Sharp Kabushiki Kaisha | Terminal device, base station device, and communication method using channel quality indicator (CQI) tables and modulation coding scheme (MCS) tables to determine modulation scheme |
| CN107318170A (en) * | 2016-04-26 | 2017-11-03 | 北京信威通信技术股份有限公司 | Uplink processing method and processing device |
| CN108365848B (en) * | 2017-01-26 | 2021-09-14 | 华为技术有限公司 | Polar code decoding method and device |
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| EP1505756A2 (en) * | 2003-07-31 | 2005-02-09 | Fujitsu Limited | Adaptive modulation and coding |
| 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 |
| CN101005301A (en) * | 2001-02-01 | 2007-07-25 | 高通股份有限公司 | Coding scheme for a wireless communication system |
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| CN101005301A (en) * | 2001-02-01 | 2007-07-25 | 高通股份有限公司 | Coding scheme for a wireless communication system |
| EP1505756A2 (en) * | 2003-07-31 | 2005-02-09 | Fujitsu Limited | Adaptive modulation and coding |
| 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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Application publication date: 20090805 Assignee: SPREADTRUM COMMUNICATIONS (SHANGHAI) Co.,Ltd. Assignor: Xinji Lease (Tianjin) Co.,Ltd. Contract record no.: 2018990000196 Denomination of invention: HSDPA medium and high order modulated downlink signaling transmission method for TD-SCDMA system Granted publication date: 20110706 License type: Exclusive License Record date: 20180801 |
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