Confirmation information feedback method

A technology for confirming information and physical control channels, which is applied in the direction of using the return channel for error prevention/detection, etc. It can solve problems such as inability to participate, increase delay, intermittent transmission, etc., and achieve the effect of improving performance and reducing transmission delay

Active Publication Date: 2008-09-17
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] When the above method is used, if the UE does not correctly detect the control channel PDCCH corresponding to its downlink subframe, the user equipment will not feed back ACK / NACK information, and the situation of discontinuous transmission (DTX for short) will occur , then the acknowledgment information corresponding to the data transmitted in the downlink subframe cannot participate in the "AND" operation process, so it is easy to mistake the acknowledgment information that should be fed back as NACK (DTX should be regarded as NACK) as ACK for feedback, There will be a situation where the UE loses data in the downlink subframe, and the UE cannot correctly obtain the information conveyed by the received data block, and requires a higher layer to perform retransmission processing, which adds additional delay

Method used

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Examples

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Embodiment 1

[0060] According to an embodiment of the present invention, a confirmation information feedback method is provided.

[0061] figure 2 It is a flowchart of a confirmation information feedback method according to an embodiment of the present invention, such as figure 2 As shown, the method includes the following steps:

[0062] Step S202: Divide the multiple downlink subframes into two downlink subframe groups, and notify the base station and the terminal of the two divided downlink subframe groups and the sequence numbers of the downlink subframes included in each downlink subframe group. The two downlink subframes feed back confirmation information in the same uplink subframe, and each downlink subframe group includes at least one downlink subframe;

[0063] Step S204: The terminal uses the indication field in the uplink physical control channel corresponding to the two downlink subframe groups to feed back the data of the downlink subframe group.

[0064] Through the technical...

Embodiment 2

[0081] According to an embodiment of the present invention, a confirmation information feedback method is provided.

[0082] Figure 5 It is a flowchart of a confirmation information feedback method according to an embodiment of the present invention, such as Figure 5 As shown, the method includes the following steps:

[0083] Step S502: Divide multiple downlink subframes into multiple downlink subframe groups, and multiple downlink subframes feedback confirmation information in the same uplink subframe, and divide the divided downlink subframe groups into multiple downlink subframe groups and each downlink subframe group. The sequence numbers of the included downlink subframes are notified to the base station and the terminal, where each downlink subframe group includes one downlink subframe or two downlink subframes;

[0084] Step S504, setting a first indication field used to indicate the number of downlink subframes in the subframe group that transmit data to the terminal;

...

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Abstract

The present invention presents a confirmation information feedback method. The method comprises the following procedures: dividing a plurality of descending sub-frames into two descending sub-frame groups, and informing two divided descending sub-frame groups and the sequence numbers of the descending sub-frames which are included in each descending sub-frame group to a base station and a terminal, wherein, a plurality of descending sub-frames feed back the confirmation information in a same ascending sub-frame, and each descending sub-frame group at least comprises a descending sub-frame; and feeding back the data of the descending sub-frame group by the terminal with the indication field in the ascending physical control channel corresponding with two descending sub-frame groups. Through the invention, the transmission time delay of the system is reduced and the capability of the system is increased.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a confirmation information feedback method. Background technique [0002] figure 1 Shows the frame structure of the Time Division Duplex (TDD) mode of the Long Term Evolution (LTE) system. In this frame structure, a 10ms radio frame (radio frame) is divided into Two half frames (half frames), 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 the standard cyclic prefix (Normal Cyclic Prefix, referred to as Normal CP), a slot contains 7 symbols with a length of 66.7us, of which the CP length of the first symbol is 5.21us, and the CP length of the remaining 6 symbols is 4.69us ; For Extended (Extended) CP, one slot contains 6 symbols, and the CP length of all symbols is 16.67 us. In this frame structure, the configuration characteristics of subframes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18
Inventor 戴博郁光辉夏树强
Owner ZTE CORP
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