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LTE-A relay system and collaboration switching method of LTE-A relay system based on auxiliary carrier

A technology of LTE-A and relay system, applied in the field of communication, can solve the problem of easy failure of handover, and achieve the effect of reducing the probability of handover interruption, improving service quality, and ensuring system coverage.

Active Publication Date: 2013-12-11
XI AN JIAOTONG UNIV
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide an LTE-A relay system and its cooperative handover method based on auxiliary carrier, which solves the problem in the prior art that the handover is prone to failure when handover occurs for cell edge users, and can improve the handover user's efficiency. service quality

Method used

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  • LTE-A relay system and collaboration switching method of LTE-A relay system based on auxiliary carrier
  • LTE-A relay system and collaboration switching method of LTE-A relay system based on auxiliary carrier
  • LTE-A relay system and collaboration switching method of LTE-A relay system based on auxiliary carrier

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with drawings and embodiments.

[0033] An LTE-A relay system includes a macro base station and at least one relay station within its coverage, and its communication link includes a direct link between the macro base station and the user, a backhaul link between the macro base station and the relay station, and the relay station An access link with a user, the macro base station is used to directly provide a low-frequency carrier channel to the user, and provide a high-frequency carrier channel to the relay station, and at the same time control the relay station to provide a high-frequency carrier channel to the user; receiving switching request information sent by the user, switching the user to an adjacent relay station; and controlling the activation and deactivation of the low-frequency carrier channel.

[0034] The relay station is used to provide the user with a high-frequency carrier channel and...

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Abstract

The invention provides an LTE-A relay system and a collaboration switching method of the LTE-A relay system based on an auxiliary carrier. Services are provided for a user by a base station and the user at the same time through a direct-connection low frequency link of the base station-the user and a high-frequency link among the base station-a relay station-the user. The switching method comprises the steps that when the high-frequency link is required to be switched, a source side base station firstly detects the low-frequency direct-connection chink directly connected with the user, and therefore when the high-frequency link is switched, the services can be continuously provided for the user. According to the method, the requirement of the user for a large broadband is met, meanwhile, the outage probability of switching is reduced, and the quality of the user services is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an auxiliary carrier-based cooperative handover method of an LTE-Advanced relay system. Background technique [0002] In the process of the further evolution of the Long Term Evolution-Advanced (LTE-Advanced, LTE-A for short), on the one hand, the LTE-Advanced system puts forward very high system capacity requirements; The large-bandwidth spectrum with capacity can only be obtained in high-frequency bands, and the path loss and penetration loss in high-frequency bands may be relatively large, making it difficult to obtain good coverage. As a key technology in the LTE-Advanced system, the relay (Relay) technology has the advantages of expanding cell coverage and improving system throughput. Relay technology can effectively fill coverage holes and shadow dead spots caused by insufficient coverage by inserting relay stations (RSs). At the same time, for inserted RSs,...

Claims

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Application Information

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IPC IPC(8): H04W36/00H04W36/30H04W72/04
Inventor 曲桦赵季红何炜扬
Owner XI AN JIAOTONG UNIV
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