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Synchronous HARQ-based method and device for preventing signal interference in wireless relay network

A technology of wireless relay network and signal interference, applied in the direction of radio relay system, wireless communication, network planning, etc., can solve the problem of self-interference at the relay device 1, preconditions are difficult to be well satisfied, and interference is not considered and other issues to achieve low cost, improve resource utilization and system performance, and avoid self-interference

Active Publication Date: 2010-09-22
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
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Problems solved by technology

[0009] It is precisely because the uplink HARQ process between the relay device and the mobile terminal is based on synchronous HARQ technology that the above two prerequisites are difficult to be well satisfied
exist Figure 2a and Figure 2b In , uplink HARQ process 1 will cause self-interference at relay device 1 in subframes 8 and 12 and subframes 8, 12 and 16 respectively
[0010] Unfortunately, since the relay device has just been introduced into the standard taking LTEA as an example, people have not considered the interference caused by it in time, and there is no corresponding solution

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  • Synchronous HARQ-based method and device for preventing signal interference in wireless relay network

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Embodiment Construction

[0031] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] understandably, in Figure 2a-2band subsequent signal flow schematic diagrams, although only one uplink HARQ process between the relay device 1 and the mobile terminal 2 is shown, those skilled in the art understand that the mobile terminal 2 and the relay device 1 can simultaneously There are other HARQ processes. For example, a downlink HARQ process occupies subframes 1, 5, 9... shown in Fig. 2 . Since in the frequency division system taking LTEA as an example, the uplink frequency band and the downlink frequency band have enough guard intervals, therefore, one subframe can be used for one uplink HARQ process and one downlink HARQ process at the same time without causing relay Self-interference at the device. In view of this, in this paper, the uplink synchronous HARQ process based on the synchronous HARQ technology will be discuss...

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Abstract

The invention provides a synchronous HARQ-based method and device for preventing signal interference in the relay equipment and mobile terminal of a wireless relay network. The method comprises the following steps: the mobile terminal judges whether the uplink HARQ process interferes the communications between the relay equipment and the base station in one subframe, and if so, the mobile terminal defers the transmission of uplink signals during the uplink HARQ process in the subframe. Preferably, the mobile terminal defers all the subsequent uplink signals in the uplink HARQ process. By adopting the method and device of the invention, self-interference in the relay equipment caused by the uplink HARQ process of the mobile terminal. In addition, no change of the physical layer of the network equipment is made, thus the cost of realizing backward compatibility is lower.

Description

technical field [0001] The present invention relates to preventing signal interference, in particular to a method and device for preventing signal interference in a synchronous HARQ-based wireless relay network. Background technique [0002] In the 3GPP LTE-Advanced standard (hereinafter referred to as LTEA), a relay device is newly introduced to improve overall system performance, for example, increase throughput, expand network coverage, and the like. Among them, many companies have proposed that within a frequency band, a relay device cannot receive and transmit signals at the same time, so as to prevent the relay device from causing interference to itself. Hereinafter, the interference caused by the relay device using the same time-frequency resource to receive and transmit signals is called self-interference. Those skilled in the art understand that the definition of self-interference herein is different from self-interference in a CDMA system. [0003] Since the downl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W16/14H04W28/04H04W28/14H04W28/26H04W88/00
CPCH04L1/1887H04B7/15585H04B7/2606H04L1/1812H04L2001/0097H04B7/14H04L1/18H04L27/26
Inventor 杨涛安东尼拉·范尼沃诺
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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