CN101527611B - Method for indicating modulation mode and transmitting data attribute in TD-SCDMA - Google Patents
Method for indicating modulation mode and transmitting data attribute in TD-SCDMA Download PDFInfo
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Abstract
The invention provides a method for indicating a modulation mode and transmitting data attribute in TD-SCDMA. The method comprises that: a network side transmits the data attribute to user equipment on a high-speed shared control channel, encodes a start number and a stop number of a channelization code by 7 bit, and indicates the modulation mode by codes of 2 bit; the start number of the channelization code is encoded by tetrad, while the stop number of the channelization code is encoded by triad, or the start number of the channelization code is encoded by the triad, while the stop number of the channelization code is encoded by the tetrad; and arbitrary three in four binary codes which consist of the last bit of the channelization code and information of the modulation mode respectively indicate 16QAM, 64QAM and orthogonal phase shift keying. By the method, the modulation mode can be indicated by 2 bit, and indicated modulation modes are increased, such as indication of 64QAM. Furthermore, the method can be compatible with both new user equipment and old user equipment.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of method of utilizing the code channel assignment information to come indicating modulation mode and transmission data attribute in TD SDMA (TD-SCDMA) system.
Background technology
3-G (Generation Three mobile communication system) has been introduced HSDPA (high speed downlink packet access technology).The key technology of HSDPA is adaptive coding and modulating (AMC:Adaptive Modulation and Coding), mixed automatic retransfer request (HARQ:Hybrid Automatic Retransmission Request); These two kinds of technology add transfers to NodeB (base station) with the business scheduling, and larger throughput can be provided, and improves spectrum efficiency, and reduces network transfer delay.
In the HSDPA of TD-SCDMA system technology, newly-increased high-speed physical downlink is shared physical channel HS-PDSCH (High Speed Physical Downlink Shared Channel), high-speed shared control channel HS-SCCH (Shared Control Channel for HS-DSCH) and up-high speed shared control channel HS-SICH (Shared Information Channel for HS-DSCH).Wherein, HS-PDSCH is used for carrying user's business datum, with the time-division, the code minute mode in shared among users.Data attribute on the HS-SCCH carrying HS-DSCH comprises following information:
Channelization code allocation information (8 bit): xccs, 1, xccs, 2 ..., xccs, 8, wherein, front 4 bits are indicated initial channel code Taoist monastic name, rear 4 bits indication stops the channel code Taoist monastic name; Do not contain in the TD-SCDMA agreement of 64QAM at present, descending of TD-SCDMA adopts SF=1 and two kinds of spreading factors of SF=16, and namely a time slot is single-code channel or 16 channelizing code channels are arranged at most, indicates like this a code channel index to need at most 4 bits.The coded system of SF=1 is initial code number=1111, and the decimal system is 15, stop code number=0000, and the decimal system is that the coded system of 0, SF=16 is that the decimal system of initial code correspondence is less than the decimal system of stop code correspondence.
Gap information (5 bit): xts, 1, xts, 2 ..., xts, 5, distribute at most five descending time slots.
Modulation system information (1 bit): xms, 1, according to agreement, 0 indication QPSK (Quadrature Phase Shift Keying), 1 indication 16QAM.
Transport block size information (6 bit): xtbs, 1, xtbs, 2 ..., xtbs, 6, totally 64 kinds of index.
Hybrid automatic repeat request process information (3 bit): xhap, 1, xhap, 2 ..., xhap, 3, maximum 8 processes.
Redundancy version information (3 bit): xrv, 1, xrv, 2, xrv, 3
New data indication (1 bit): xnd, 1
HS-SCCH cyclic sequence number (3 bit): xhcsn, 1, xhcsn, 2, xhcsn, 3
UE (subscriber equipment) identification number (16 bit): xue, 1, xue, 2 ..., xue, 16
Wherein the transmission block size has 6bit to represent, implication is the index of respective transmissions piece in the affiliated corresponding HSDPA transport block size index of the ability rating table of UE, has 64.UE carries out demodulation according to the indicated modulation system of HS-SCCH, transmission block size to HS-PDSCH.
In order further to improve spectrum efficiency, 64QAM will introduce HSDPA.But originally only represent two kinds of pattern: QPSK and 16QAM with a bit.Must represent 64QAM by certain modification.
By analyzing the structure of HS-SCCH, can find out, the number of bits of channelization code allocation can not reduce, because initial code number and stop code be number all in 0～15 scope, at most all will be with full four bits.When the code channel number that distributes was 1, initial code number and stop code number equated, therefore, utilizes stop code number can not extract less than the condition of initial code number and represent 64QAM.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of TD-SCDMA indicating modulation system and sends the method for data attribute, utilizes channelization code allocation information to combine with modulation system information and can represent more modulation system.
In order to address the above problem, the invention provides a kind of method of TDS-CDMA system indicating modulation system, comprise: when network side is filled in High-Speed Shared Control Channel, with 7 bits the initial code of channel code number and stop code number are encoded, with the coding indicating modulation mode of 2 bits.
Further, when spreading factor was 1, with 7 bits the initial code of channel code number and stop code number being encoded referred to: initial code number=1111, stop code number=000, or initial code number=111, stop code number=0000.
Further, when spreading factor is 16, with 7 bits the initial code of channel code number and stop code number being encoded refers to, with 4 binary systems the initial code of described channel code number is encoded, and with 3 binary systems the stop code of described channel code number is encoded.
Further, the code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the stop code of described channel code number is:
When the initial code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described stop code correspondence is encoded divided by 2 value again;
When the initial code of described channel code number is odd number, with 3 binary systems the decimal system of described stop code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the stop code number of channel code.
Further, when spreading factor is 16, with 7 bits the initial code of channel code number and stop code number being encoded refers to, with 3 binary systems the initial code of described channel code number is encoded, and with 4 binary systems the stop code of described channel code number is encoded.
Further, the code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the initial code of described channel code number is:
When the stop code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described initial code correspondence is encoded divided by 2 value again;
When the stop code of described channel code number is odd number, with 3 binary systems the decimal system of described initial code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the initial code number of channel code.
Further, the coding indicating modulation mode of described usefulness 2 bits refers to, indicate respectively 16QAM, 64QAM and Quadrature Phase Shift Keying for any 3 kinds in 4 kinds of binary codings that form with last and modulation system information of channel code, remaining a kind of as keeping or indicating as system mistake.
The present invention also provides the method that sends data attribute in a kind of TDS-CDMA system, comprise: network side sends data attribute to subscriber equipment on High-Speed Shared Control Channel, with 7 bits the initial code of channel code number and stop code number are encoded, with the coding indicating modulation mode of 2 bits.
Further, when spreading factor is 1, to the coded system of the initial code of described channel code number and stop code number be: initial code number=1111, stop code number=000, or initial code number=111, stop code number=0000.
Further, when spreading factor is 16, with 7 bits the initial code of channel code number and stop code number being encoded refers to, with 4 binary systems the initial code of described channel code number is encoded, and with 3 binary systems the stop code of described channel code number is encoded.
Further, the code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the stop code of described channel code number is:
When the initial code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described stop code correspondence is encoded divided by 2 value again;
When the initial code of described channel code number is odd number, with 3 binary systems the decimal system of described stop code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the stop code number of channel code.
Further, when spreading factor is 16, with 7 bits the initial code of channel code number and stop code number being encoded refers to, with 3 binary systems the initial code of described channel code number is encoded, and with 4 binary systems the stop code of described channel code number is encoded.
Further, the code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the initial code of described channel code number is:
When the stop code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described initial code correspondence is encoded divided by 2 value again;
When the stop code of described channel code number is odd number, with 3 binary systems the decimal system of described initial code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the initial code number of channel code.
Further, the coding indicating modulation mode of described usefulness 2 bits refers to, indicate respectively 16QAM, 64QAM and Quadrature Phase Shift Keying for any 3 kinds in 4 kinds of binary codings that form with last and modulation system information of channel code, remaining a kind of as keeping or indicating as system mistake.
In sum, the invention provides the method for a kind of TD-SCDMA system's indicating modulation system and transmission data attribute, initial code by representing channel code with 7 bits number and stop code number replace existing usefulness 8 bits to represent the initial code number of channel code and stop code number, thereby can represent modulation system with 2 bits, the modulation system of expression increases to some extent, as can representing 64QAM, and the method can also compatible old and new users's equipment.
Embodiment
The invention provides the method for a kind of TD-SCDMA system's indicating modulation system and transmission data attribute, the initial code of channel code number and stop code number are encoded with 7 bits by the method boil down to that will number encode to the initial code of channel code number and stop code with 8 bits, remaining 1 bit and modulation system information xms, 1 modulation system that combines indication can reach at most 4 kinds, wherein can comprise 64QAM.
The present embodiment provides the method for utilizing compression channel code information indicating modulation mode in a kind of TD-SCDMA system and sending data attribute, at first, network side UE on HS-SCCH sends before the data attribute with UE approximately during settled SF=16, the code channel number of using when network side is dispatched at every turn all is even number or all is odd number, the present invention represents network side with NodeB, and supposes that the code channel number of using when network side and UE agreement are dispatched at every turn all is even number.Then network side, is filled in HS-SCCH and is sent to UE after the information such as code channel distribution according to the good transmission block size of the Information Selection such as CQI, modulation system that UE reports;
When filling in HS-SCCH, the data attribute except channelization code allocation information and modulation system fill in all same prior aries, the coding of the initial code of channel code number and stop code number can be any in the following mode:
(1) coding method of SF=1 makes into: initial code number=1111, and the decimal system is 15, stop code number=000, the decimal system is 0;
When the coding method of SF=16 is, use xccs, 1, xccs, 2...xccs, 7 these 7 bits represent the initial code number of channel code and stop code number, and the same prior art of expression of the initial code of channel code number is namely used 4 binary representations, number then only with 3 binary representations, its coded system can be the stop code of channel code:
The decimal value of the stop code correspondence of channel code is designated as End_Code,
If initial code number is even number, stop code number=(End_Code-1)/2 then;
If initial code number is odd number, stop code number=End_Code/2 then;
After number conversion of above-mentioned stop code, its maximum will less than or equal to 7, become 3 bits with binary coding again.After coding was finished, channelization code allocation information became 7 bits: xccs by 8 original bits, 1, xccs, and 2 ..., xccs, 7, front four bits indication initial code number, rear three bits indication stop code number; The sequence number minimum be MSB (highest significant position), maximum is LSB (least significant bit).
(2) coding method of SF=1 makes into: initial code number=111, and the decimal system is 7, stop code number=0000, the decimal system is 0;
When the coding method of SF=16 is, still use xccs, 1, xccs, 2...xccs, 7 these 7 bits number are encoded to the initial code of channel code number and stop code, and the same prior art of coding of the stop code of channel code number is namely encoded with 4 binary systems, the initial code of channel code number is then only encoded with 3 binary systems, and its coded system can be:
The decimal value of the initial code correspondence of channel code is designated as Start_Code.
If stop code number is even number, initial code number=(Start_Code-1)/2 then;
If stop code number is odd number, initial code number=Start_Code/2 then;
After number conversion of above-mentioned initial code, its maximum will less than or equal to 7, become 3 bits with binary coding again.After coding was finished, channelization code allocation information became 7 bits: xccs by 8 original bits, 1, xccs, and 2 ..., xccs, 7, first three bit indication initial code number, rear four bits are indicated stop code number; The sequence number minimum be MSB, that maximum is LSB.
After the initial code that represents channel code with above-mentioned dual mode number and stop code number, use xccs, 8 and xms, 1 encodes to modulation system together, namely uses two binary representations, by [xccs, 8, xms, 1] four kinds of codings that form, can get arbitrarily three kinds and represent respectively 64QAM, QPSK and these three kinds of modulation systems of 16QAM, remaining is a kind of as keeping item or indicating as system mistake; For example can be, 00 represents QPSK, 01 expression 16QAM, 10 expression 64QAM, 11 expression reserved (keeping item).
At last, when UE receives NodeB behind the data attribute that HS-SCCH sends, jointly judge the modulation system that NodeB adopts by wherein modulation mode information bits and last bit channel code allocation bit.
The below further specifies the inventive method with 4 application examples, and these 4 examples are all supposed SF=16:
Embodiment 1:
Guaranteeing under the condition that base station scheduling can only be dispatched as unit take two code channels, to distribute a time slot, code channel distributes since No. 1 No. 8 channel codes of channel code to the (subscript is from 0), modulation system is 16QAM, channelization code allocation employing method (1) is example, being encoded to of its correspondence:
Initial code number: xccs, 1, xccs, 2, xccs, 3, xccs, 4=0001;
Stop code number: xccs, 5, xccs, 6, xccs, 7=(8/2) 2=100;
Modulation system represents 16QAM with 01, i.e. xccs, 8, xms, 1=01.
Embodiment 2:
Guaranteeing under the condition that base station scheduling can only be dispatched as unit take two code channels, to distribute a time slot, code channel distributes since No. 0 No. 15 channel codes of channel code to the (subscript is from 0), modulation system is 64QAM, channelization code allocation employing method (1) is example, being encoded to of its correspondence:
Initial code number: xccs, 1, xccs, 2, xccs, 3, xccs, 4=0000;
Stop code number: xccs, 5, xccs, 6, xccs, 7=((15-1)/2) 2=111;
Modulation system represents 64QAM with 10, i.e. xccs, 8, xms, 1=10.
Embodiment 3:
Guaranteeing under the condition that base station scheduling can only be dispatched as unit take two code channels, to distribute a time slot, code channel distributes since No. 1 No. 8 channel codes of channel code to the (subscript is from 0), modulation system is 16QAM, channelization code allocation employing method (2) is example, being encoded to of its correspondence:
Initial code number: xccs, 1, xccs, 2, xccs, 3 ,=((1-1)/2) 2=000;
Stop code number: xccs, 4, xccs, 5, xccs, 6, xccs, 7=1000;
Modulation system represents 16QAM with 01, i.e. xccs, 8, xms, 1=01.
Embodiment 4:
Guaranteeing under the condition that base station scheduling can only be dispatched as unit take two code channels, to distribute a time slot, code channel distributes since No. 4 No. 15 channel codes of channel code to the (subscript is from 0), modulation system is 64QAM, channelization code allocation employing method (2) is example, being encoded to of its correspondence:
Initial code number: xccs, 1, xccs, 2, xccs, 3 ,=(4/2) 2=000;
Stop code number: xccs, 4, xccs, 5, xccs, 6, xccs, 7=1111;
Modulation system represents 64QAM with 10, i.e. xccs, 8, xms, 1=10.
Claims (8)
1. the method for a TDS-CDMA system indicating modulation system, comprise: when network side is filled in High-Speed Shared Control Channel, with 7 bits in the 8 bit channel code assignment information initial code of channel code number and stop code number are encoded, be combined into the coding indicating modulation mode of 2 bits with 1 bit of remaining 1 bit and modulation system information; Wherein, 7 bits number are encoded to the initial code of channel code number and stop code and are referred to:
When spreading factor is 1: initial code number=1111, stop code number=000; Or initial code number=111, stop code number=0000;
When spreading factor is 16: with 4 binary systems initial code number is encoded, with 3 binary systems stop code number is encoded; Or with 3 binary systems initial code number is encoded, with 4 binary systems stop code number is encoded.
2. the method for claim 1 is characterized in that:
For with 4 binary systems initial code number being encoded, with 3 binary systems stop code number is encoded:
The code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the stop code of described channel code number is:
When the initial code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described stop code correspondence is encoded divided by 2 value again;
When the initial code of described channel code number is odd number, with 3 binary systems the decimal system of described stop code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the stop code number of channel code.
3. the method for claim 1 is characterized in that:
For with 3 binary systems initial code number being encoded, with 4 binary systems stop code number is encoded:
The code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the initial code of described channel code number is:
When the stop code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described initial code correspondence is encoded divided by 2 value again;
When the stop code of described channel code number is odd number, with 3 binary systems the decimal system of described initial code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the initial code number of channel code.
4. the method for claim 1 is characterized in that:
The coding indicating modulation mode of described 2 bits refers to, indicate respectively 16QAM, 64QAM and Quadrature Phase Shift Keying for any 3 kinds in 4 kinds of binary codings that form with last and modulation system information of channel code, remaining a kind of as keeping or indicating as system mistake.
5. send the method for data attribute in the TDS-CDMA system, comprise: network side sends data attribute to subscriber equipment on High-Speed Shared Control Channel, with 7 bits in the 8 bit channel code assignment information initial code of channel code number and stop code number are encoded, be combined into the coding indicating modulation mode of 2 bits with 1 bit of remaining 1 bit and modulation system information; Wherein, 7 bits number are encoded to the initial code of channel code number and stop code and are referred to:
When spreading factor is 1: initial code number=1111, stop code number=000; Or initial code number=111, stop code number=0000;
When spreading factor is 16: with 4 binary systems initial code number is encoded, with 3 binary systems stop code number is encoded; Or with 3 binary systems initial code number is encoded, with 4 binary systems stop code number is encoded.
6. method as claimed in claim 5 is characterized in that:
For with 4 binary systems initial code number being encoded, with 3 binary systems stop code number is encoded:
The code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the stop code of described channel code number is:
When the initial code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described stop code correspondence is encoded divided by 2 value again;
When the initial code of described channel code number is odd number, with 3 binary systems the decimal system of described stop code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the stop code number of channel code.
7. method as claimed in claim 5 is characterized in that:
For with 3 binary systems initial code number being encoded, with 4 binary systems stop code number is encoded:
The code channel number of using during the each scheduling of base station and subscriber equipment agreement all is even number, to the coding method of the initial code of described channel code number is:
When the stop code of described channel code number is even number, with 3 binary systems the decimal subtract 1 of described initial code correspondence is encoded divided by 2 value again;
When the stop code of described channel code number is odd number, with 3 binary systems the decimal system of described initial code correspondence is encoded divided by 2 value;
The described binary coding that obtains then represents the initial code number of channel code.
8. method as claimed in claim 5 is characterized in that:
The coding indicating modulation mode of described 2 bits refers to, indicate respectively 16QAM, 64QAM and Quadrature Phase Shift Keying for any 3 kinds in 4 kinds of binary codings that form with last and modulation system information of channel code, remaining a kind of as keeping or indicating as system mistake.
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| 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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| Title |
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| 3rd Generation Partnership Project.TS 25.212 V8.0.0.《Technical Specification Group Radio Access Network |
| 3rd Generation Partnership Project.TS 25.212 V8.0.0.《Technical Specification Group Radio Access Network Multiplexing and channel coding (FDD)(Release 8)》.2007,第4.6.1,4.6.2.3节. * |
| Multiplexing and channel coding (FDD)(Release 8)》.2007,第4.6.1，4.6.2.3节. |
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