Data transmission method and system in wireless relay scene

A data transmission method and data transmission system technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve the problems of data transmission delay, occupying Un port resources, etc., to save resources and reduce data transmission delay Effect

Active Publication Date: 2011-04-27
ZTE CORP
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  • Abstract
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Problems solved by technology

[0011] In view of this, the main purpose of the present invention is to provide a data transmission method and system in a wireless relay scenario, so as to solve the problem in the prior art that the retransmission of downlink data occupies Un port resources and causes data transmission delay

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  • Data transmission method and system in wireless relay scene
  • Data transmission method and system in wireless relay scene
  • Data transmission method and system in wireless relay scene

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Embodiment Construction

[0040] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0041] A data transmission method in a wireless relay scenario provided by the present invention, such as figure 2 As shown, it mainly includes the following steps:

[0042] In step 201, the Donor-eNB and the Relay negotiate in advance the RV sequence and data retransmission time used for downlink data retransmission.

[0043] The Relay mentioned in the present invention refers to the second type of relay node. The pre-negotiated RV and data retransmission time can be stipulated by the agreement; it can also be selected by the Donor-eNB and notified to the Relay through the radio resource control (RRC, Radio Resource Control) signaling dedicated to the Relay; it can also be used by the Donor-eNB MAC control cells are multiplexed with UE data and sent to the Relay.

[0044] In step 202, when the Donor-eNB and the ...

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Abstract

The invention discloses a data transmission method in a wireless relay scene, which comprises the following steps that: a donor evolved node B (donor-eNB) and a relay pre-negotiate a redundancy version (RV) sequence and data retransmission time during downlink data retransmission; and the donor-eNB and the relay perform downlink data cooperative retransmission on the UE according to the pre-negotiated RV sequence and the pre-negotiated data retransmission time during the downlink data retransmission when knowing that initially transmitted data sent to user equipment (UE) fail. The invention also discloses a data transmission system in the wireless relay scene. By the method and the system, frequent information exchange between the donor-eNB and the relay for data retransmission resource scheduling is avoided, resources of a Un interface control channel and a data shared channel are saved, and data transmission delay is reduced simultaneously.

Description

technical field [0001] The present invention relates to a wireless communication relay technology, in particular to a data transmission method and system in a wireless relay scenario. Background technique [0002] In order to meet the growing demand for large bandwidth and high-speed mobile access, the Third Generation Partnership Project (3GPP, Third Generation Partnership Projects) launched the Advanced Long-Term Evolution (LTE-Advanced) on the basis of the Long-Term Evolution (LTE, Long Term Evolution) system. , Long Term Evolution advance) standard. LTE-Advanced is the evolution of LTE technology, which retains the core of LTE technology, and adopts a series of new technologies on this basis to achieve the purpose of improving spectrum utilization, system capacity and data throughput. Wireless relay (Relay) technology is one of the technologies in LTE-Advanced, which aims to expand the coverage of the cell, reduce blind spots in communication, balance loads, transfer se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/18H04W72/12
Inventor 王冠宙张银成梁枫陈思
Owner ZTE CORP
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