Feedback method and device for downlink subframe of base station and user terminal

A technology of user terminals and feedback devices, which is applied in the field of communication, can solve problems such as network resource allocation, uplink and downlink transmission conflicts, and limited flexibility of use, and achieve the effect of balancing feedback overhead

Inactive Publication Date: 2015-08-26
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

[0007] The present invention provides a downlink subframe feedback method and device for a base station and a user terminal to solve the technical problems in the prior art that the flexibility of use is limited, and it is easy to cause network resource allocation and uplink and downlink transmission conflicts

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  • Feedback method and device for downlink subframe of base station and user terminal
  • Feedback method and device for downlink subframe of base station and user terminal

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Embodiment 1

[0054] Embodiment 1 of the present invention provides a downlink subframe feedback method under the TDD-LTE system to explain a specific implementation process of the embodiment of the present invention in detail, see image 3 :

[0055] Step 301: Determine the downlink subframe feedback rule according to the actual usage of the uplink and downlink subframes.

[0056] In this step, it is first necessary to select an appropriate UL-DL configuration and subframe offset according to the actual usage of the uplink and downlink subframes. see Figure 4 , so that the TDD-LTE system in this embodiment 1 actually uses UL-DL configuration #1, and specifies different subframe offsets λ for different UEs, wherein the reference configuration indicated for UE1 is {UL-DL configuration #2 , subframe offset λ=0}, the reference configuration indicated for UE2 is {UL-DL configuration #2, subframe offset λ=1}.

[0057] According to the downlink subframe feedback rules, referring to Table 1, t...

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Abstract

The invention provides a feedback method and a feedback device for downlink subframes of a base station and a user terminal. The base station downlink subframe feedback method comprises the steps of: determining a downlink subframe feedback rule which comprises UL-DL configuration and subframe offset according to actual use condition of uplink and downlink subframes, and informing the user terminal; and carrying out communication reception according to the downlink subframe feedback rule. The feedback method and the feedback device for the downlink subframes of the base station and the user terminal can select uplink subframes bearing HARQ-ACK flexibly on the bases of ensuring that the HARQ-ACK of all downlink subframes can be fed back normally. The feedback method provided by the embodiment of the invention maintains the backward compatibility of an FDD / TDD LTE system, can effectively balance HARQ-ACK feedback overhead of each uplink subframe, is suitable for the scene that the uplink subframes cannot operate normally due to causes such as interference, and can help technologies such as carrier aggregation, double connection and D2D to realize coexistence usage.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a downlink subframe feedback method and device for a base station and a user terminal. Background technique [0002] The current Long Term Evolution (LTE) / LTE-A system includes two modes: Time Division Duplexing (TDD) and Frequency Division Duplexing (FDD). Each downlink subframe is based on 3GPP TS36.213 standard to determine the corresponding uplink subframe to feed back hybrid automatic repeat request acknowledgment (hybridautomatic repeatrequest acknowledgment, HARQ-ACK), wherein, for the FDD LTE / LTE-A system, the HARQ-ACK of subframe n-4 is specified by the subframe Frame n feedback; and for TDD LTE / LTE-A system, the corresponding specifications are given in Table 1, namely: subframe n-k m (k m ∈K:{k 0 ,k 1 ,...,k M-1}) HARQ-ACK is fed back by subframe n. [0003] [0004] Table 1 Downlink association set index of TDD system [0005] Since the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18
Inventor 陈哲鲁智池连刚
Owner POTEVIO INFORMATION TECH CO LTD
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