Method and system for allocating and transmitting downlink subfames in second-class relay station

A technology of a transmission system and a relay station, which is applied in the field of downlink subframe configuration and transmission methods and systems, can solve problems such as interference and communication quality deterioration, and achieve the effects of ensuring data transmission, improving communication quality, and improving transmission efficiency.

Inactive Publication Date: 2011-05-04
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, when the second type of relay station is receiving the downlink transmission of the base station, if the second type of relay station is also performing downlink transmission to the user, it will cause interference between the receiving end and the transmitting end of the second type of relay station itself, so that will cause serious deterioration of the communication quality

Method used

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  • Method and system for allocating and transmitting downlink subfames in second-class relay station
  • Method and system for allocating and transmitting downlink subfames in second-class relay station
  • Method and system for allocating and transmitting downlink subfames in second-class relay station

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Experimental program
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Effect test

Embodiment 1

[0055] In the second type of relay network, such as Figure 7 As shown, the two adjacent relay downlink subframes are the downlink Access subframe and the downlink Backhaul subframe in turn. According to the method of the present invention, the first 2 OFDM symbols of subframe 1 are configured as guard interval GP1, and the first 3 OFDM symbols of subframe 2 are configured as guard interval GP2, and the second type of relay station does not perform Reception and transmission of PDCCH. At this moment, the relay station of the second type can downlink transmit complete data on the subframe 1 without the cooperation of the base station or the relay station of the first type.

Embodiment 2

[0057] In the second type of relay network, such as Figure 8 As shown, the two adjacent relay downlink subframes are the downlink Access subframe and the downlink Backhaul subframe in turn. According to the method of the present invention, the last OFDM symbol of subframe 1 is configured as a guard interval GP1, the second type of relay station does not receive and transmit data and DMRS on GP1, and the base station or the first type of relay station on GP1 Coordinated launch data and DMRS. At this moment, the relay station of the second type can normally receive the information carried on the PDCCH in the subframe 2 .

Embodiment 3

[0059] In the second type of relay network, such as Figure 9 As shown, the two adjacent relay downlink subframes are a downlink Backhaul subframe and a downlink Access subframe in sequence. According to the method of the present invention, the first OFDM symbol of subframe 2 is configured as a guard interval GP1, and the second type of relay station does not receive and transmit PDCCH on GP1. At this time, the second type of relay station can normally receive the PDCCH in subframe 1, and can downlink transmit complete data in subframe 2 without the cooperation of the base station or the first type of relay station.

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Abstract

The invention discloses a method and system for allocating and transmitting downlink subfames in a second-class relay station. The method comprises the steps of: configuring guard intervals for downlink subframes of the second-class realy station by an upper-level network node of the second-class relay station, and configuring a time slot in a downlink Access subframe, in which a physical downlink control channel (PDCCH) is arranged, a time slot in a downlink Backhaul subframe, in which the PDCCH is arranged, and the last orthogonal frequency division multiplexing (OFDM) symbol in the downlink Access subframe, to be the guard intervals; and carrying out reception and transmission by the second-class relay station according to the configured downlink subframe structure. The method and the system solve the problem of interference generated between a receiving end and a transmitting end of the second-class relay per se, improve communication quality, realize the radio frequency state conversion of the second-class relay station between downlink reception and downlink transmission, and are compatible with the old version of users, thereby guaranteeing data transmission completeness and improving transmission efficiency.

Description

Technical field: [0001] The invention belongs to the field of mobile communication; in particular, it relates to a downlink subframe configuration and transmission method and system for a second type (Type II) relay station. Background technique: [0002] As an emerging technology, relay technology has attracted more and more attention and is regarded as a key technology of B3G / 4G. Since future wireless communication or cellular systems require increased coverage and support for higher rate transmission, this poses new challenges to wireless communication technology. At the same time, the cost of system construction and maintenance is more prominent. With the increase of transmission rate and communication distance, the problem of battery energy consumption has become more prominent, and future wireless communication will use higher frequencies, resulting in more serious path loss attenuation. Through the relay technology, the traditional single-hop link can be divided int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/12H04W88/08
Inventor 梁枫毕峰袁明杨瑾吴栓栓袁弋非赵刚陈东丽
Owner ZTE CORP
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