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Method and system for realizing uplink retransmission of access link

An access link and uplink retransmission technology, applied in the field of mobile communications, can solve problems such as lowering system resource utilization and user throughput, failure to receive uplink retransmission signals from relay domain UEs, and retransmission failures, etc., to achieve improved Configuration flexibility and the effect of improving retransmission efficiency

Inactive Publication Date: 2010-11-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0010] Considering the time-division nature of RN on Backhaul Link and Access Link, if the uplink retransmission of UE in the relay domain is configured using the Timing Table method with a fixed timing relationship, such a problem will arise in the TDD system: when the system configures RN When performing uplink transmission to the eNB in ​​n subframes, n subframes may also be the subframes in which a certain relay domain UE needs to perform uplink retransmission, and the RN will not be able to receive the uplink retransmission of the relay domain UE in this subframe. This will cause the uplink HARQ retransmission to fail, resulting in invalid scheduling of the uplink retransmission by the RN, reducing system resource utilization and user throughput

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  • Method and system for realizing uplink retransmission of access link
  • Method and system for realizing uplink retransmission of access link
  • Method and system for realizing uplink retransmission of access link

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Embodiment Construction

[0047] figure 2 A flow chart of the method for realizing uplink retransmission in the present invention, such as figure 2 Shown, the inventive method comprises the following steps:

[0048] Step 200: The RN does not correctly receive the uplink transmission of a certain relay domain UE, and generates NACK feedback for the uplink transmission.

[0049] Step 201: RN judges whether the corresponding uplink retransmission subframe set by the system conflicts with its own uplink transmission to the eNB's backhaul link, and if conflicts, proceeds to step 202; if not conflicts, proceeds to step 203.

[0050] Step 202: RN configures additional indication information for uplink retransmission, and sends it together with NACK feedback and UL Grant information to UE in relay domain that needs uplink retransmission. Go to step 204 .

[0051] The uplink retransmission additional indication information is used to adjust the position of the uplink retransmission subframe, and instruct t...

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Abstract

The invention provides a method and a system for realizing uplink retransmission of an access link. The method comprises the following step that: when an uplink subframe specified in a timing table preset in a time division duplexing (TDD) system cannot be used for performing the uplink retransmission from relay field user equipment (UE) to a relay station (RN), the RN adjusts the position of an uplink retransmission subframe and instructs the relay field UE to perform the uplink retransmission on other available uplink subframes through uplink retransmission attached indicating information. Due to the adoption of the method and the system, effective configuration of the uplink retransmission of the relay field UE is realized, the configuration flexibility of the uplink retransmission of the relay field UE is enhanced, and the efficiency, system resource utilization ratio and user throughput of hybrid automatic repeat request (HARQ) retransmission are improved.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to an uplink access link (Access Link) between a relay station (RN, Relay Station) and a user equipment (UE, User Equipment) under a Time Division Duplexing (TDD, Time Division Duplexing) system Method and system for retransmission. Background technique [0002] As a key technology of B3G / 4G, the relay (Relay) technology has occupied an important position in the research of the Long Term Evolution (LTE, Long Term Evolution) standard. Introducing RN into the system can improve network coverage and improve user throughput, but at the same time RN changes the original network structure. figure 1 It is a schematic diagram of the composition structure of the relay network, such as figure 1 As shown, the TDD system that introduces RN divides the original single-hop link between eNB (enhanced Node B) and UE in LTE network into two-hop links to form a backhaul link (Backhaul Link...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16
Inventor 杨瑾毕峰梁枫袁明吴栓栓
Owner ZTE CORP
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