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A second type of relay station and its method for sending downlink control information

A technology of control information and transmission method, applied in the field of mobile communication, can solve the problems of inability to receive PDCCH normally, inability to receive and process PDSCH and R-PDSCH, and reduce system efficiency, etc.

Inactive Publication Date: 2014-10-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, considering that in order to achieve the transition from downlink transmission to downlink reception without interference by the second type of relay station, some OFDM symbols at the front end of the downlink Backhaul subframe may need to be set as guard intervals to avoid self-interference caused by radio frequency switching, then The second type of relay station cannot normally receive the PDCCH, and the R-PDCCH multiplexed on the control domain, and cannot further receive and process the corresponding PDSCH and R-PDSCH, such as Figure 4 , will lead to the loss of control information and data information transmission, reducing system efficiency

Method used

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  • A second type of relay station and its method for sending downlink control information
  • A second type of relay station and its method for sending downlink control information
  • A second type of relay station and its method for sending downlink control information

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Effect test

Embodiment 1

[0053] In the second type of relay network, such as Figure 12 As shown, there are three adjacent relay downlink subframes which are a downlink Access subframe, a downlink Backhaul subframe and a downlink Access subframe in sequence. Wherein the first 3 OFDM symbols of the subframe 2 control domain are configured as guard intervals, then the second type of relay station cannot receive the PDCCH on the subframe 2 control domain, and according to the method of the present invention, the data domain of the subframe 2 is correspondingly The downlink control information is set in the data field of the subframe 2, which can ensure that the second type of relay station normally receives and processes the data information in the subframe 2.

[0054] Relay downlink control information corresponding to the above data field Generally speaking, the data field always corresponds to a set of downlink control information for the data field, which includes the time-frequency position, modulat...

Embodiment 2

[0057] In the second type of relay network, such as Figure 13 As shown, there are three adjacent relay downlink subframes which are a downlink Backhaul subframe, a downlink Access subframe and a downlink Backhaul subframe in sequence. Where the first 3 OFDM symbols of subframe 3 are configured as a guard interval, the second type of relay station cannot receive PDCCH in the control field of subframe 3, and according to the method of the present invention, the data field of subframe 3 is correspondingly downlinked The control information is set on the data field or the control field of the previous subframe 1, and the relay station of the second type receives and processes the relevant data information on the data field of the subframe 3 according to the relay downlink control information received and obtained on the subframe 1, It can be guaranteed that the data information on the subframe 3 is normally received and processed.

[0058] The above-mentioned relevant data infor...

Embodiment 3

[0061] In the second type of relay network, such as Figure 14 As shown, there are three adjacent relay downlink subframes which are a downlink Access subframe, a downlink Backhaul subframe and a downlink Backhaul subframe in sequence. Wherein the first 3 OFDM symbols of the subframe 2 control domain are configured as guard intervals, then the second type of relay station cannot receive the PDCCH on the subframe 2 control domain, and according to the method of the present invention, the data domain of the subframe 2 is correspondingly The downlink control information is set in the control field or data field of the subsequent subframe 3.

[0062] The second type of relay station first receives and stores all the data or specified part of the data in the data field of subframe 2, and after receiving and obtaining the corresponding downlink control information in the control field of subframe 3, according to the control information Instructing to process the stored data can ens...

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Abstract

A method for transmitting downlink control information is provided in the present invention. The method includes that: while a control area of a downlink Backhaul sub-frame of a type?relay station is configured as a guard interval, downlink control information corresponding to a data area of the downlink Backhaul sub-frame is configured in any other downlink Backhaul sub-frame designated by a base station or configured in the data area of the downlink Backhaul sub-frame to be transmitted. An equipment for transmitting downlink control information is also provided in the present invention. The device includes: a configuration module(1), which is used to, while a control area of a downlink Backhaul sub-frame of a type?relay station is configured as a guard interval, configure downlink control information corresponding to a data area of the downlink Backhaul sub-frame in any other downlink Backhaul sub-frame designated by a base station; a transmission module(2), which is used to transmit the downlink control information corresponding to the data area of the downlink Backhaul sub-frame. The present invention ensures the integrality of the control information and data information transmission, and enhances the processing efficiency of a system.

Description

Technical field: [0001] The invention belongs to the field of mobile communication; in particular, it relates to a second type (Type 2) relay station and a method for sending downlink control information thereof. 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 into multiple m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04W48/12H04W88/04
CPCH04W48/12H04W16/26
Inventor 梁枫毕峰杨瑾吴栓栓袁弋非赵刚陈东丽
Owner ZTE CORP
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