CN102075284B - Method for transmitting TFCI data and TD-SCDMA trunking communication system - Google Patents
Method for transmitting TFCI data and TD-SCDMA trunking communication system Download PDFInfo
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- CN102075284B CN102075284B CN 200910221588 CN200910221588A CN102075284B CN 102075284 B CN102075284 B CN 102075284B CN 200910221588 CN200910221588 CN 200910221588 CN 200910221588 A CN200910221588 A CN 200910221588A CN 102075284 B CN102075284 B CN 102075284B
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Abstract
The present invention provides a method for transmitting TFCI data and a TD-SCDMA trunking communication system, wherein the method is completed in such a way that: a transmitting terminal obtains TFCI data to be used, corrects and encodes the TFCI data, encodes the TFCI data already corrected and encoded by using second order Reed Muller code, and maps the encoded TFCI data to a radio frame and then transmits it out; and a receiving terminal receives the TFCI data sent by the transmitting terminal, decodes the TFCI data by using the second order Reed Muller code and then corrects and decodes the TFCI data. The method for transmitting the TFCI data of the invention can enhance the reliability of TFCI in the TD-SCDMA trunking communication system.
Description
Technical field
The present invention relates to a kind of wireless communication technology, more specifically, relate to a kind of at TD SDMA access (Time Division-Synchronous Code Division Multiple Access, abbreviation TD-SCDMA) method and the TD-SCDMA trunked communication system of transmission transformat combination indication (Transport FormatCombination Indicator is called for short TFCI) data in the trunked communication system.
Background technology
The TD-SCDMA trunked communication system is a kind of trunked communication system that grows up on existing TD-SCDMA technology basis, adopts the communication mode take group as unit, user's shared service and the control channel of group inside.Because the TD-SCDMA trunking communication, its descending intelligent antenna technology that can not adopt in the TD-SCDMA system can only be launched group user data and control information in the mode of broadcasting.
TFCI in the TD-SCDMA trunked communication system is be used to the transmission format parameters of informing the receiver transmit leg, so that the recipient can correctly decipher, Fig. 1 is the position view of TFCI information in business time-slot in the TD-SCDMA trunked communication system.Because the descending of TD-SCDMA trunked communication system can not be adopted intelligent antenna technology, so just can not obtain the beam forming gain of smart antenna, also namely can not guarantee the reliability of TFCI data receiver.If in the TFCI data that receiving terminal receives, have mistake, mean that receiver attempts the transformat combination of mistake is deciphered, if when decoding, detect the TFCI error in data, this means that transmission block is dropped.
Nokia's number of patent application 200480041800; in the open text of patent name for " being used for carrying out the method and apparatus that the TFCI reliability detects at E-DCH " a kind of method of protecting the TFCI reliability is proposed; the method mainly is to protect TFCI by the mode of error detection, but can not strengthen the performance of TFCI.
Because trunked communication system is descending can not to use intelligent antenna technology, be difficult to guarantee the TFCI the reliability of the data at receiving terminal, therefore, need on the basis of existing technology, seek a kind of method that can strengthen the TFCI data reliability
Summary of the invention
The object of the invention is to, a kind of method and a kind of TD-SCDMA trunked communication system of the TFCI of transmission data is provided, can strengthen the reliability of TFCI in the TD-SCDMA trunked communication system.
In order to solve the problems of the technologies described above, the invention provides a kind of method of transmission transformat combination indication (TFCI) data, comprise,
Transmitting terminal obtains stand-by TFCI data, and described TFCI data are carried out error correction coding, and the TFCI data after utilizing the second order reed muller code to error correction coding are encoded, and the TFCI data-mapping after then will encoding is launched in radio frames;
After receiving terminal receives the TFCI data that transmitting terminal sends, described TFCI data are carried out carrying out error-correcting decoding after the decoding of second order reed muller code again.
Further, said method has following characteristics:
Described transmitting terminal adopts linear block codes that described TFCI data are carried out error correction coding;
Described receiving terminal adopts linear block codes to carry out error-correcting decoding.
Further, said method has following characteristics:
Described transmitting terminal adopts loop coding that described TFCI data are carried out error correction coding;
Described receiving terminal adopts loop coding to carry out error-correcting decoding.
Further, said method has following characteristics: the message length encoding with described TFCI data in the process of described error correction coding is 10 bits.
Further, said method has following characteristics: the message length with described TFCI data in the process of described TFCI data being carried out the decoding of second order reed muller code is decoded as 10 bits.
The present invention also provides a kind of TD-SCDMA trunked communication system, comprising:
Transmitting terminal is used for obtaining stand-by TFCI data, and described TFCI data are carried out error correction coding, and the TFCI data after utilizing the second order reed muller code to error correction coding are encoded, and the TFCI data-mapping after then will encoding is launched in radio frames;
Receiving terminal, be used for receiving the TFCI data that transmitting terminal sends after, described TFCI data are carried out carrying out error-correcting decoding after the decoding of second order reed muller code again.
Further, above-mentioned TD-SCDMA trunked communication system has following characteristics:
Described transmitting terminal, the concrete employing linear block codes that is used for is carried out error correction coding to described TFCI data;
Described receiving terminal, the concrete employing linear block codes that is used for is carried out error-correcting decoding.
Further, above-mentioned TD-SCDMA trunked communication system has following characteristics:
Described transmitting terminal, the concrete employing loop coding that is used for carries out error correction coding to described TFCI data;
Described receiving terminal, the concrete employing loop coding that is used for carries out error-correcting decoding.
Further, above-mentioned TD-SCDMA trunked communication system has following characteristics: described transmitting terminal, concrete to be used in the process of described error correction coding be 10 bits with the message length encoding of described TFCI data.
Further, above-mentioned TD-SCDMA trunked communication system has following characteristics: described receiving terminal, concrete being used for is decoded as 10 bits in the process of described TFCI data being carried out the decoding of second order reed muller code with the message length of described TFCI data.
Compared with prior art, the present invention has carried out secondary coding at transmitting terminal, has added the function of error correction, carries out error-correcting decoding at receiving terminal, because error correction coding has the function of EDC error detection and correction, so further guaranteed the TFCI the reliability of the data.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the part of application, in the accompanying drawings:
Fig. 1 is the position view of TFCI information in business time-slot in the TD-SCDMA trunked communication system;
Fig. 2 is the mapping schematic diagram of TFCI coded-bit each TFCI field in radio frames in the TD-SCDMA trunked communication system;
Fig. 3 is the flow chart of the method for transmission TFCI data of the present invention;
Fig. 4 is the flow chart of method of the transmission TFCI data of the embodiment of the invention 1;
Fig. 5 is the flow chart of method of the transmission TFCI data of the embodiment of the invention 2.
Embodiment
TFCI is up to 10 information bits in the TD-SCDMA communication system, utilize second order Reed-Muller (Reed bridle) code that this information bit is encoded into 32 bits, information bit behind the coding is mapped in the radio frames, and Fig. 2 is the mapping schematic diagram of TFCI each TFCI field in radio frames.In the TD-SCDMA trunked communication system, the length of TFCI information bit is that 4 bits can satisfy the demands, and remaining bit information can be used for strengthening the reliability of front information bit.The present invention has carried out secondary coding at transmitting terminal, has added error correction, carries out error-correcting decoding at receiving terminal, because error correction coding has the function of EDC error detection and correction, so further guaranteed the reliability of TFCI.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
In the TD-SCDMA of the present embodiment trunked communication system, comprise transmitting terminal and receiving terminal, undertaken alternately by wireless channel between transmitting terminal and the receiving terminal, in order to strengthen the reliability of TFCI data receiver, the present embodiment provides a kind of method of transmitting the TFCI data in the TD-SCDMA trunked communication system, as shown in Figure 3, comprise following step:
S11: transmitting terminal obtains the TFCI data that will use, and the TFCI data are carried out error correction coding, and the message length of the TFCI data behind the coding is 10 bits;
S12: transmitting terminal carries out second order Reed-Muller coding to the TFCI data of 10 bits among the step S11, and the message length of the TFCI data behind the coding is 32 bits, with the TFCI data-mapping of 32 bits behind the coding in radio frames;
S13: through the transmission of wireless channel, receiving terminal receives after the TFCI data, carries out Reed-Muller decoding, and the message length of the TFCI data after the decoding is 10 bits;
S14: be that the TFCI data of 10 bits are carried out error-correcting decoding with the message length among the step S13, the decoding data that obtains is required TFCI.
The TD-SCDMA trunked communication system of the present embodiment has carried out secondary coding at transmitting terminal, has added the function of error correction coding, carries out error-correcting decoding at receiving terminal, because error correction coding has the function of EDC error detection and correction, so further guaranteed the reliability of TFCI.
In the present embodiment, the error correction code approach that is used for enhancing TFCI performance preferably can adopt: linear block codes and loop coding, the below is described in detail the implementation that adopts these two kinds of error correcting codes to strengthen the reliability of TFCI respectively.
Embodiment 1:
In the present embodiment, the error correcting code of using is linear block codes, and the method for concrete transmission TFCI data as shown in Figure 4, comprises following step:
S201, transmitting terminal obtain the TFCI data that will use, adopt linear block codes that the TFCI data are carried out error correction coding, and the message length of the TFCI data behind the coding is 10 bits;
Because the TD-SCDMA trunked communication system, the message length of the TFCI data of transmitting terminal is 4 bits at this moment, and the TFCI data are carried out error correction coding, and the message length behind the coding is 10 bits.
At first the bit information of the TFCI data of hypothesis use this moment is 1010, what the error correction coding in the present embodiment was used is linear block codes, linear block codes be exactly supervision relation between information bit and the check digit be linear, be error correction coding mode commonly used at present, the bit information of these TFCI data is 1011110111 after carrying out the linear block codes coding.
S202, the TFCI data of 10 bits among the step S201 are carried out second order Reed-Muller coding, the message length behind the coding is 32 bits.The bit information of the TFCI data that the Reed-Muller coding is later is: 01000110000111110110111000100011.
With the TFCI data-mapping of 32 bits behind the coding in radio frames.Fig. 2 is the mapping schematic diagram of TFCI coded-bit each TFCI field in radio frames in the TD-SCDMA trunked communication system.As can see from Figure 2, the message length of the every a part of TFCI in a radio frames is 8 bits.
The transmission of S203, process wireless channel, receiving terminal receives after the TFCI data, the TFCI data message of this moment is soft bit information, soft bit information is to comprise radio channel information and without the bit information of hard decision, these TFCI data are carried out second order Reed-Muller decoding, and the message length after the decoding is 10 bits.
S204, be that the TFCI data of 10 bits are carried out error-correcting decoding with the message length among the step S203, the decoding data that obtains is required TFCI.
Because what error correction coding adopted is that linear block codes is encoded, then when decoding, also use linear block codes to decipher.
Embodiment 2:
In the present embodiment, the error correcting code of using is loop coding, and the method for concrete transmission TFCI data as shown in Figure 5, comprises following step:
The TFCI data that S301, transmitting terminal acquisition will be used adopt cyclic code that the TFCI data are carried out error correction coding, and the message length of the TFCI data behind the coding is 10 bits;
Because the TD-SCDMA trunked communication system, the message length of the TFCI data of transmitting terminal is 4 bits at this moment, and the TFCI data are carried out error correction coding, and the message length behind the coding is 10 bits.
The bit information of the TFCI data of at first using hypothesis at this moment is 1010, and what the error correction coding in the present embodiment was used is loop coding, carries out that the bit information of these TFCI data is 0101001010 after the loop coding.
S302, the TFCI data of 10 bits among the step S301 are carried out second order Reed-Muller coding, the message length behind the coding is 32 bits.The bit information that carries out the later TFCI data of second order Reed-Muller coding is: 00100010101011010110001001000001.
With the TFCI data-mapping of 32 bits behind the coding in radio frames.Fig. 2 is the mapping schematic diagram of TFCI coded-bit each TFCI field in radio frames in the TD-SCDMA trunked communication system.As can see from Figure 2, the message length of the every a part of TFCI in a radio frames is 8 bits.
The transmission of S303, process wireless channel, receiving terminal receives after the TFCI data, and the TFCI data message of this moment is soft bit information, and these TFCI data are carried out second order Reed-Muller decoding, and the message length after the decoding is 10 bits.
S304, be that the TFCI data of 10 bits are carried out error-correcting decoding with the message length among the step S303, the decoding data that obtains is required TFCI.
Because what error correction coding adopted is loop coding, then when decoding, also use loop coding to decipher.
For those skilled in the art; after having understood content of the present invention and principle; can be in the situation that do not deviate from the spirit and scope of the present invention; the method according to this invention is carried out various corrections and the change on form and the details, but these are based on correction of the present invention with change still within claim protection range of the present invention.
Claims (10)
1. the method for transmission transformat combination indication (TFCI) data comprises,
Transmitting terminal obtains stand-by TFCI data, and described TFCI data are carried out error correction coding, and the TFCI data after utilizing the second order reed muller code to error correction coding are encoded, and the TFCI data-mapping after then will encoding is launched in radio frames;
After receiving terminal receives the TFCI data that transmitting terminal sends, described TFCI data are carried out carrying out error-correcting decoding after the decoding of second order reed muller code again.
2. the method for claim 1 is characterized in that:
Described transmitting terminal adopts linear block codes that described TFCI data are carried out error correction coding;
Described receiving terminal adopts linear block codes to carry out error-correcting decoding.
3. the method for claim 1 is characterized in that:
Described transmitting terminal adopts loop coding that described TFCI data are carried out error correction coding;
Described receiving terminal adopts loop coding to carry out error-correcting decoding.
4. such as each described method of claim 1-3, it is characterized in that:
Message length encoding with described TFCI data in the process of described error correction coding is 10 bits.
5. method as claimed in claim 4 is characterized in that: the message length with described TFCI data in the process of described TFCI data being carried out the decoding of second order reed muller code is decoded as 10 bits.
6. TD SDMA access (TD-SCDMA) trunked communication system is characterized in that, comprise,
Transmitting terminal is used for obtaining stand-by TFCI data, and described TFCI data are carried out error correction coding, and the TFCI data after utilizing the second order reed muller code to error correction coding are encoded, and the TFCI data-mapping after then will encoding is launched in radio frames;
Receiving terminal, be used for receiving the TFCI data that transmitting terminal sends after, described TFCI data are carried out carrying out error-correcting decoding after the decoding of second order reed muller code again.
7. TD-SCDMA trunked communication system as claimed in claim 6 is characterized in that:
Described transmitting terminal, the concrete employing linear block codes that is used for is carried out error correction coding to described TFCI data;
Described receiving terminal, the concrete employing linear block codes that is used for is carried out error-correcting decoding.
8. TD-SCDMA trunked communication system as claimed in claim 6 is characterized in that:
Described transmitting terminal, the concrete employing loop coding that is used for carries out error correction coding to described TFCI data;
Described receiving terminal, the concrete employing loop coding that is used for carries out error-correcting decoding.
9. such as each described TD-SCDMA trunked communication system of claim 6-8, it is characterized in that:
Described transmitting terminal, concrete to be used in the process of described error correction coding be 10 bits with the message length encoding of described TFCI data.
10. TD-SCDMA trunked communication system as claimed in claim 9 is characterized in that:
Described receiving terminal, concrete being used for is decoded as 10 bits in the process of described TFCI data being carried out the decoding of second order reed muller code with the message length of described TFCI data.
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| CN1864349A (en) * | 2003-10-02 | 2006-11-15 | Lg电子株式会社 | Signaling method of transport format combination |
| CN1918928A (en) * | 2004-02-18 | 2007-02-21 | 诺基亚公司 | Method and apparatus for performing a tfci reliability check in e-dch |
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| CN1918928A (en) * | 2004-02-18 | 2007-02-21 | 诺基亚公司 | Method and apparatus for performing a tfci reliability check in e-dch |
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