CN1516371A - Transmission format combined indication decoding method in communication system - Google Patents
Transmission format combined indication decoding method in communication system Download PDFInfo
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- CN1516371A CN1516371A CNA031013430A CN03101343A CN1516371A CN 1516371 A CN1516371 A CN 1516371A CN A031013430 A CNA031013430 A CN A031013430A CN 03101343 A CN03101343 A CN 03101343A CN 1516371 A CN1516371 A CN 1516371A
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Abstract
The invention relates to a transmission format combination indication decoding method in the communication system, firstly making transmission formatting combination indication (TFCI) decoding on each frame at the minimum transmission time interval (TTI), and calculating quality measurement indication of the TFCI decoding result for each frame; then, selecting the best TFCI decoding result as TFCI decoding result at the minimum TTI. It heightens the TFCI decoding performance.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the transformat combination directive decoding method offered in a kind of communication system.
Background technology
Two types DPCH (DPCH) is arranged: Dedicated Physical Data Channel (DPDCH:Dedicated Physical DataChannel) and Dedicated Physical Control Channel (DPCCH:Dedecated Physical ControlChannle) in wideband code division multichannel (WCDMA) communication system.Wherein, Dedicated Physical Control Channel is used to carry the control information that physical layer produces, and control information comprises: support channel estimating that use and pilot tone (Pilot) bit that the sending and receiving end is all known, power control (TPC:Transmit Power Control) bit, feedback indication (FBI:Feedback Indicator) bit and transformat combination indication (TFCI:Transport Format Combination Indicator) bit when being used for coherent demodulation.
In the WCDMA communication system, a plurality of transmission channels can be multiplexed into same physical channel, each transmission channel all has the attribute of oneself, wherein the dynamic attribute of transmission channel is included in the transmission block size and the transmission block piece number of transmission in the Transmission Time Interval (TTI:Transmission Time Interval), and the changed bit rate of transmission channel realizes by change transmission block size and transmission block piece number between every TTI.The TTI information that the physical layer of data receiver is sent according to the upper strata calculates a transformat combination indication (TFCI) that meets transformat combination at present used on the transmission channel, to obtain the transformat combination that present transfer of data is adopted.Receiving terminal just can be known the transformat combination that is multiplexed into the transmission channel on the corresponding 10ms physical frame after detecting TFCI, and size of the transmission block on the transmission channel and transmission block piece number, and then acquisition is mapped to the bit rate and the employed spreading factor of physical channel.
For example, but the TTI value is 1,2,4,8, respectively corresponding 1,2,4,8 physical frames.Data behind each transmission channel coding will send on TTI value corresponding physical frame number.If, TTI=4, then the data of the transmission channel behind the coding will be mapped on 4 physical frames.As shown in Figure 1, represented among the figure that 3 transmission channels are multiplexing and be mapped to process on the physical frame that wherein Zui Da TTI value is 8, minimum TTI value is 2; The TFCI information of each frame in minimum TTI (TTI＞1) is identical.
In order to obtain the dynamic attribute of transformat combination (TFC) and the pairing transformat of each transmission channel, to instruct follow-up deinterleaving, the decoding rate coupling, processes such as channel decoding and Cyclic Redundancy Check error detection need be carried out TFCI decoding to Frame.Currently used TFCI decode procedure is to utilize the last frame TFCI decode results of minimum TTI as final TFCI decode results, concrete TFCI decode procedure is as shown in Figure 2: receive the soft information of DPCCH after every frame demodulation, data before described soft information is meant and declares firmly, as soft information 1.5 through really up to the mark declare after judgement for bit 0, soft information-1.5 through really up to the mark declare after judgement for bit 1, earlier through the TFCI abstraction module, the soft information of the TFCI field of each time slot is extracted from the DPCCH frame that receives, and the TFCI that sends next stage to separates mapping block; TFCI separates all TFCI fields among the frame DPCCH that mapping block will receive and reverts to the TFCI decoding module that sends a frame after 32 data to; The TFCI decoding module of one frame uses typical TFCI decoding algorithm to solve the TFCI of every frame, obtains the TFC of corresponding transmission channel and the dynamic attribute of transformat, and further obtains bit rate and the employed spreading factor that be mapped to physical channel this moment.
The characteristics of traditional TFCI decoding are only to utilize the DPCCH demodulating information of present frame to solve TFCI, do not consider to utilize the identical TFCI information of each the frame repeat its transmission in the minimum TTI to improve the performance of TFCI decoding, and then obtain more reliable spreading factor and TFC.
Summary of the invention
The purpose of this invention is to provide the transformat combination directive decoding method offered in a kind of communication system,, obtain more reliable spreading factor and TFC, effectively improve data communication quality to improve the performance of TFCI decoding.
The object of the present invention is achieved like this: the transformat combination directive decoding method offered in the described communication system comprises:
A, respectively each frame in the minimum transfer time interval (TTI) in the communication system is carried out transformat combination indication (TFCI) decoding;
B, calculate the quality metric indication of the TFCI decode results of each frame respectively;
C, selection quality metric indicate best TFCI decode results as TFCI decode results in the minimum TTI.
Described quality metric is designated as: the signal interference ratio of every frame (SIR) value.
Described quality metric is designated as: the pilot bit error rate (BER) of every frame.
Described step c further comprises: select the best TFCI decode results of quality metric indication as TFCI decode results in the minimum TTI, and determine spreading factor and transformat combination according to this TFCI decode results.
Described transformat combination directive decoding method offered is: be the detection method of a kind of code encoding/decoding mode and transformat.
Described communication system is: be the variable Rate communication system identical with transformat of code encoding/decoding mode in the minimum TTI.
Described communication system is: Wideband Code Division Multiple Access (WCDMA) (WCDMA) communication system.
The value of described minimum TTI is greater than 1 frame.
By technique scheme as can be seen, the present invention has utilized the identical TFCI information of each the frame repeat its transmission in the minimum TTI to carry out TFCI decoding, select the TFCI decode results of the TFCI decode results of the best frame of quality metric indication as minimum TTI, improved the performance of TFCI decoding greatly, and then can obtain more reliable transmission channel spreading factor and TFC, thereby improve the transmission performance of link.Simultaneously, realization cost of the present invention is lower, and calculating and a selection comparison mechanism of only needing to increase quality metric get final product, and make Virtual network operator can exchange the bigger improvement of communication quality with less input for.
Description of drawings
Fig. 1 is the multiplexing of transmission channel and the schematic diagram that is mapped on the physical frame;
Fig. 2 is existing TFCI decode procedure schematic diagram;
Fig. 3 is a TFCI decode procedure schematic diagram of the present invention.
Embodiment
In communication system, in the WCDMA communication system, the TFCI information of each frame in the minimum TTI (TTI＞1) is identical, core concept of the present invention is to utilize the identical TFCI information of each the frame repeat its transmission in the minimum TTI to improve the decoding performance of TFCI, and then obtain more reliable spreading factor and TFC, only utilize the DPCCH demodulating information of present frame to solve the not good shortcoming of the existing decoding performance of TFCI of present frame to overcome present TFCI decoding.Transformat combination directive decoding method offered in the communication system provided by the present invention comprises:
Step 1: receive each frame (minimum TTI is greater than 1 frame) in the minimum TTI, and respectively each frame is carried out TFCI decoding;
Each frame to minimum TTI both can carry out TFCI decoding according to existing TFCI interpretation method, also can adopt other TFCI interpretation method to carry out TFCI decoding;
The process of carrying out TFCI decoding according to existing TFCI interpretation method is: at first receive the soft information of DPCCH (Dedicated Physical Control Channel) after the frame demodulation in the minimum TTI; Then, the TFCI information with each time slot extracts from the DPCCH frame; At last, TFCI information is reverted to 32 data, and use the TFCI decoding algorithm to solve the TFCI of every frame;
Step 2: the quality metric indication of calculating each frame TFCI decode results in the minimum TTI;
In the WCDMA communication system, can select the SIR estimated value of every frame to indicate as quality metric, the computational methods of the SIR of every frame are for to do on average the SIR estimated value (15 time slots) in a frame of each time slot, and because in the WCDMA communication system, in order to make the needs of inner-loop power control, the SIR to each time slot estimates, therefore, above-mentioned result of calculation can be directly used in enforcement of the present invention;
Also can adopt the pilot bit BER (error rate) of every frame to indicate in the specific implementation process of the present invention as quality metric;
Step 3: select to determine the TFCI decode results of the best TFCI decode results of quality metric indication as this final channel;
Promptly in the WCDMA communication system, under the situation of each transmission channel minimum TTI, if each TFCI decode results difference of received frame is selected the TFCI decode results of the best TFCI decode results of quality metric indication as current channel greater than 10ms.
The present invention is not only applicable to decipher as the TFCI in the wireless communication systems such as WCDMA, also can be applied to simultaneously carry out TFCI decoding in speed remains unchanged in other minimum TTI the variable Rate communication system, to utilize in such communication system the code encoding/decoding mode of each frame characteristics identical in the minimum TTI with transformat, improve the TFCI decoding performance, raising is to the detection probability of code encoding/decoding mode and transformat, thus the receptivity of raising transmission.
Claims (8)
1, the transformat combination directive decoding method offered in a kind of communication system is characterized in that comprising:
A, respectively each frame in the minimum transfer time interval (TTI) in the communication system is carried out transformat combination indication (TFCI) decoding;
B, calculate the quality metric indication of the TFCI decode results of each frame respectively;
C, selection quality metric indicate best TFCI decode results as TFCI decode results in the minimum TTI.
2, the transformat combination directive decoding method offered in the communication system according to claim 1 is characterized in that described quality metric is designated as: the signal interference ratio of every frame (SIR) value.
3, the transformat combination directive decoding method offered in the communication system according to claim 1 is characterized in that described quality metric is designated as: the pilot bit error rate (BER) of every frame.
4, the transformat combination directive decoding method offered in the communication system according to claim 1, it is characterized in that described step c further comprises: select the best TFCI decode results of quality metric indication as TFCI decode results in the minimum TTI, and determine spreading factor and transformat combination according to this TFCI decode results.
5, the transformat combination directive decoding method offered in the communication system according to claim 1 and 2 is characterized in that described transformat combination directive decoding method offered is: be the detection method of a kind of code encoding/decoding mode and transformat.
6, the transformat combination directive decoding method offered in the communication system according to claim 1 is characterized in that described communication system is: be the variable Rate communication system identical with transformat of code encoding/decoding mode in the minimum TTI.
7, the transformat combination directive decoding method offered in the communication system according to claim 6 is characterized in that described communication system is: Wideband Code Division Multiple Access (WCDMA) (WCDMA) communication system.
8, the transformat combination directive decoding method offered in the communication system according to claim 1, the value that it is characterized in that described minimum TTI is greater than 1 frame.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420334C (en) * | 2005-03-14 | 2008-09-17 | 大唐移动通信设备有限公司 | A Method for Blind Detection of Transmission Format |
| CN1780198B (en) * | 2004-11-17 | 2010-04-14 | 北京三星通信技术研究有限公司 | Method for judging data packet encoding and decoding methods according to decoding results |
| CN102111213A (en) * | 2009-12-25 | 2011-06-29 | 中兴通讯股份有限公司 | Method for decoding treatment and device adopting same |
| CN104104473A (en) * | 2013-04-01 | 2014-10-15 | 联发科技股份有限公司 | Data processing method performed by frequency division duplex equipment of universal mobile communication system |
-
2003
- 2003-01-03 CN CNB031013430A patent/CN100490362C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1780198B (en) * | 2004-11-17 | 2010-04-14 | 北京三星通信技术研究有限公司 | Method for judging data packet encoding and decoding methods according to decoding results |
| CN100420334C (en) * | 2005-03-14 | 2008-09-17 | 大唐移动通信设备有限公司 | A Method for Blind Detection of Transmission Format |
| CN102111213A (en) * | 2009-12-25 | 2011-06-29 | 中兴通讯股份有限公司 | Method for decoding treatment and device adopting same |
| WO2011076006A1 (en) * | 2009-12-25 | 2011-06-30 | 中兴通讯股份有限公司 | Method and device for decoding processing |
| CN102111213B (en) * | 2009-12-25 | 2013-08-07 | 中兴通讯股份有限公司 | Method for decoding treatment and device adopting same |
| US8917730B2 (en) | 2009-12-25 | 2014-12-23 | Zte Corporation | Decoding method and apparatus |
| CN104104473A (en) * | 2013-04-01 | 2014-10-15 | 联发科技股份有限公司 | Data processing method performed by frequency division duplex equipment of universal mobile communication system |
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