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Method and device for transmitting downlink feedback information for trunk link

A technology for feedback information and relay links, applied in wireless communication, using return channels for error prevention/detection, electrical components, etc., can solve problems such as loss of feedback information ACK/NACK

Inactive Publication Date: 2010-12-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the provisions of the TDD LTE protocol, the No. 3 uplink subframe transmits service data, and the No. 9 downlink subframe performs feedback, that is, carries the corresponding ACK / NACK feedback information of the No. 3 uplink subframe service data. However, in the TDD LTE-A system, The No. 9 downlink subframe is used for the relay station to send downlink data to the user terminal (UE, User Equipment). Obviously, if the ACK / NACK feedback timing relationship in the TDD LTE protocol continues to be used, the uplink service data in the No. 3 relay subframe will be The feedback information ACK / NACK is lost

Method used

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  • Method and device for transmitting downlink feedback information for trunk link
  • Method and device for transmitting downlink feedback information for trunk link
  • Method and device for transmitting downlink feedback information for trunk link

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Part of the uplink and downlink subframes in the radio frame are configured for communication between the base station and the relay station, and this configuration is static. The so-called static means that the configuration mode of the radio frame selected when the base station communicates with the relay station is definite, and the configuration mode of the radio frame relay subframe in this configuration mode is also definite, that is, the radio frame selected and the pair of radio frames in the radio frame The allocation method of the relay subframe has been determined. That is, when communicating between the base station and the relay station, the configured uplink relay subframe and downlink relay subframe in a certain radio frame must be used. In this example, subframe uplink and downlink configuration mode 6 in Table 1 is taken as an example for illustration. figure 2 It is a schematic structural diagram of the configuration mode of the relay subframe in Emb...

Embodiment 2

[0068] Part of the uplink and downlink subframes in the radio frame are configured for communication between the base station and the relay station, and this configuration is semi-static. The so-called semi-static means that for a certain subframe uplink and downlink configuration form, the configuration of the relay subframe is uniquely determined for a period of time, that is, if communication between the base station and the relay station is required, the base station configures the relay station according to the possible traffic volume of the relay station. A part of uplink subframes and downlink subframes are used as relay subframes, and this configuration lasts for a period of time, which is a configuration period of relay subframes. After a configuration period, for the same subframe uplink and downlink configuration mode, the configuration of the relay subframe may change. This example uses subframe uplink and downlink configuration mode 3 shown in Table 1 as an exampl...

Embodiment 3

[0074] Part of the uplink and downlink subframes in the radio frame are configured for communication between the base station and the relay station, and this configuration mode is dynamic. The so-called dynamic means that the base station configures the relay subframe in real time and notifies the relay station for a wireless frame of a certain subframe uplink and downlink configuration mode. That is, when communicating between the base station and the relay station, the base station will configure the relay subframe in real time according to information such as the possible traffic volume of the relay station. In this example, the subframe uplink and downlink configuration mode 3 in Table 1 is taken as an example to further illustrate the technical solution of the present invention.

[0075] For the wireless subframe of subframe uplink and downlink configuration mode 3, this example lists two possible relay subframe configuration modes, as follows Figure 4 As shown in a and...

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Abstract

The invention discloses a method for transmitting downlink feedback information of a trunk link, which comprises the steps of: when the configuration of a relay subframe of a radio frame ensures that the downlink feedback information of the trunk link can not loaded according to a mode specified in a time division duplex long-term evolution protocol, determining a new loading mode of the downlink feedback information by a base station according to the relay subframe of the radio frame, informing information of the relay subframe of the radio frame or the new loading mode to a relay station; and loading and transmitting the downlink feedback information according to the new loading form. At the same time, the invention discloses a device realizing the method. The invention has the advantages of simple realization and practicality.

Description

technical field [0001] The present invention relates to relay link downlink feedback information transmission technology, in particular to a relay link downlink feedback information in a Time Division Duplex (TDD, Time Division Dual) Advanced Long Term Evolution (LTE-A, Long Term Evolution-Advanced) system Transmission method and apparatus. Background technique [0002] The development requirement of mobile communication is to support higher transmission rate, better signal coverage and higher resource utilization. In order to achieve a high transmission rate, the next generation mobile communication system will use a higher frequency bandwidth to transmit signals, and a higher frequency bandwidth will bring greater path loss at the same time, affecting network coverage. Relay (Relay) technology can increase coverage and balance, increase cell throughput, and compared with base stations, relay stations have relatively small configuration costs, so relay technology is regard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W80/02H04L1/16
Inventor 吴栓栓毕峰梁枫袁明杨瑾
Owner ZTE CORP
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