Dispatching method of relay system

Abstract

The invention provides a dispatching method of a relay system. According to the method, first, a UE needing preferable dispatching is dispatched in a centralized type dispatching mode, and then remaining resources are utilized to dispatch other UEs in a distribution type dispatching mode. The dispatching method uses two dispatching modes to conduct two stage coordinated dispatching, can exploit the advantages of the two dispatching modes, can reduce signaling overheads between a relay device and a base station, and has a high resource utilization rate.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a scheduling method of a relay system. Background technique [0002] In the follow-up mobile communication system of 3G, as the user's demand for system bandwidth increases, the frequency band used by the mobile communication system has to develop to a higher frequency band, such as using a frequency band exceeding 3GHz, etc. At this time, radio wave transmission The reduction of distance leads to the reduction of base station coverage; at the same time, the increase of user capacity makes researchers have to find ways to expand network capacity on the basis of cellular network architecture, so the introduction of relay sites has gradually attracted more and more attention in the industry . The introduction of relays is typical in WiMAX systems. IEEE802.16J began to formulate relay network standards in 2006; among IMT-Advanced, the introduction of relays has been clearly define...

AI Technical Summary

Problems solved by technology

[0005] 1) Reduced resource utilization: that is, after the base station allocates relay resources for the relay, this part of the resources cannot be used when resources other than the relay are in short supply, and when the access link resources of the relay are in short supply, the relay Resources other than those cannot be used by the relay

[0006] 2) Limit the flexibility of resource scheduling: the relay device can only schedule users within a certain resource range, which limits the flexibility of resource allocation in multi-hop cells.

[0008] 1) Signaling interaction is frequent, and signaling delay is difficult to guarantee: Since scheduling signaling needs to be forwarded through relays, it is difficult to guarantee the real-time performance of scheduling information, CQI feedback information, and ACK / NACK message feedback information

[0009] 2) The signaling overhead is large, which affects system performance: when the relay link resources are relatively tight, the transmission overhead of scheduling signaling will affect the performance of the entire system

Base station coverage scenarios will be more complex

Both distributed resource scheduling and centralized resource scheduling independently cannot achieve the best scheduling effect in relatively complex coverage scenarios due to the above deficiencies.

[0011] A scheduling method with less signaling overhead between relay devices and base stations and higher resource utilization has not yet been proposed to adapt to complex coverage scenarios in practical applications

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