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Downlink HARQ feedback method and device under TDD system

A feedback device and downlink data technology, applied in the field of communication, can solve the problems of unbalanced control signaling overhead and no HARQ timing design scheme, and achieve the effect of balancing control information overhead

Inactive Publication Date: 2017-02-15
MEIZU TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If only considering reducing the HARQ feedback delay (in the case of meeting the 3ms delay), the HARQ timing corresponding to a frame configuration module can be designed as follows figure 1 As shown, the uplink subframe 2 needs to feed back the ACK / NACK of two downlink HARQ processes, while the uplink subframe 7 does not need to feed back the ACK / NACK of any HARQ process, which causes the control signaling overhead required by the uplink subframe unbalanced
[0005] Therefore, currently there is no specific HARQ timing design scheme for the 3ms delay mode of the LTE TDD system

Method used

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  • Downlink HARQ feedback method and device under TDD system
  • Downlink HARQ feedback method and device under TDD system
  • Downlink HARQ feedback method and device under TDD system

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Embodiment Construction

[0042] In order to have a clearer understanding of the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0043] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0044] figure 2 A schematic flowchart of a downlink HARQ feedback method in a TDD system according to an embodiment of the present invention is shown.

[0045] Such as figure 2 As shown, the downl...

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Abstract

The present invention provides a downlink HARQ feedback method under a TDD system and a downlink HARQ feedback device under a TDD system. The downlink HARQ feedback method under a TDD system comprises: receiving downlink data transmitted on a subframe n in a current frame; feeding HARQACK or NACK feedback information for the downlink data back onto a target uplink subframe, wherein the target uplink subframe is an uplink subframe n+k in the current frame or an uplink subframe (n+k)%10 in the next frame adjacent to the current frame, % is a remainder operator, n is an integer from 0 to 9, and k is a preset value greater than 0. By the technical scheme of the invention, a downlink HARQ feedback time sequence can meet the minimum delay requirement of the TDD system and the control information overhead on each uplink subframe can also be effectively balanced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular, to a downlink HARQ feedback method of a TDD system and a downlink HARQ feedback device of a TDD system. Background technique [0002] With the development of the mobile Internet, a large number of application services satisfying various specific functions have emerged. Some of these services have lower requirements on data delay, such as sending and receiving emails, downloading movies, etc.; but some other services have strict requirements on data delay, such as online games, snapping up, grabbing red envelopes, etc. The delay of user data is required to be as short as possible. Regarding how to obtain a shorter user plane data delay, there are two main ideas in the current LTE (Long Term Evolution, long-term evolution) standard discussion: one way is to use a shorter TTI (Transmission Time Interval, transmission time interval), That is, the data sending and recei...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L5/00H04W72/04
CPCH04L1/1812H04L5/0055H04W72/0446H04W72/23
Inventor 不公告发明人
Owner MEIZU TECH CO LTD