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Interruption transmission detection method and corresponding down distribution indication method

A technology for assigning instructions and detection methods, applied in the field of communications, can solve problems such as loss and inability to accurately detect DTX conditions, and achieve the effects of reducing delay, ensuring complete and effective transmission, and improving transmission performance

Inactive Publication Date: 2009-04-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] The technical problem to be solved by the present invention is to provide a detection method for discontinuous transmission and a corresponding downlink allocation indication method to solve the problem that DTX cannot be accurately detected due to the loss of the last downlink subframe allocated to the terminal corresponding to the uplink subframe The problem

Method used

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  • Interruption transmission detection method and corresponding down distribution indication method
  • Interruption transmission detection method and corresponding down distribution indication method
  • Interruption transmission detection method and corresponding down distribution indication method

Examples

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Effect test

example 1

[0082] Assuming that the number of downlink subframes with resources allocated to the terminal in all downlink subframes corresponding to an uplink subframe is 1, then the downlink subframe with resources allocated to the terminal is the last downlink subframe, where DAI is taken The value is calculated as follows:

[0083] V DAI Last = ( 1 mod n ) + 1 = 2 , Among them, n is 4;

[0084] According to the correspondence between the DAI signaling and its value agreed in Table 3, the corresponding DAI signaling is 01.

[0085] If the terminal does not correctly detect the target PDCCH channel on the corresponding downlink subframe, the terminal does not send any confirmation information.

example 2

[0087] Assuming that all downlink subframes corresponding to an uplink subframe have resources allocated to the terminal and the number of downlink subframes is 2, then the value of the DAI sent to the terminal in the first downlink subframe with resources allocated to the terminal is based on The following formula is calculated: V DAI =(1-1)mod 4+1=1. The DAI value sent to the terminal in the last downlink subframe is calculated according to the following formula: V DAI Last = ( 2 mod 4 ) + 1 = 3 . According to the correspondence between the DAI signaling and its value agreed in Table 3, the corresponding DAI signaling in the first and second downlink subframes is 00,10.

[0088] After the base station sends DAI to the terminal in the downlink subframe, the terminal processes it in the manne...

example 3

[0098] Assuming that all downlink subframes corresponding to an uplink subframe have resources allocated to the terminal and the number of downlink subframes is 3, then there are resources allocated to the terminal in the first and second downlink subframes to be sent to the terminal. The values ​​are 1 and 2, respectively, and the DAI value sent to the terminal in the third and last downlink subframe is calculated according to the following formula:

[0099] V DAI Last = ( 3 mod n ) + 1 = 4 , Among them, n is 4;

[0100] According to the correspondence between the DAI signaling and its value agreed in Table 3, the corresponding DAI signaling in the first, second, and third downlink subframes are 00, 01, and 11.

[0101] After the base station sends DAI to the terminal in the downlink subfram...

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Abstract

The invention discloses a downlink allocation indication method. In all downlink sub-frames which correspond to an uplink sub-frame and have resources allocated to a terminal, a DAI value sent by a base station to the terminal in other downlink sub-frames except for the last downlink sub-frame equals (M-1)modn+1, and the DAI value sent to the terminal in the last sub-frame is 1-2 which is not equal to the value of the (M-1)modn+1, M is the total number of the last downlink sub-frame and the previous downlink sub-frames which have resources allocated to the terminal, n equals 2, and i is the bit number of DAI signaling; the terminal calculates the DAI value sent to the terminal in every downlink sub-frame according to a corresponding way in which the DAI value is determined by the base station, and the terminal judges whether discontinuous transmission occur by comparing the DAI value with the received DAI value. The method solves the problem of being incapable of accurately detecting the DTX situation resulting from the loss of the last downlink sub-frame that corresponds to the uplink sub-frame and is allocated to the terminal.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a method for detecting intermittent transmission and a corresponding downlink allocation indication method. Background technique [0002] figure 1 The frame structure of the TDD (Time Division Duplex) mode of the LTE (Long Term Evolution) system is shown. In this frame structure, a 10ms radio frame is divided into two half frames ( Half frame), each half frame is divided into 10 time slots with a length of 0.5ms, and two adjacent time slots form a subframe with a length of 1ms. One half frame contains 5 subframes. For Normal CP (Normal Cyclic Prefix), a slot contains 7 symbols with a length of 66.7μs, of which the CP length of the first symbol is 5.21μs, and the CP length of the remaining 6 symbols is 4.69μs; for Extended (Extended) CP, a slot contains 6 symbols, and the CP length of all symbols is 16.67 μs. In this frame structure, the configuration characteristics of subf...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04B7/26
Inventor 戴博郝鹏梁春丽张禹强
Owner ZTE CORP
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