Method and device for allocating resources in OFDM/MIMO system

Abstract

The invention discloses a method and a device for scheduling resources in an OFDM / MIMO system. In the method and the device, cell users are divided into cell edge users or cell center users and the resources are allocated to the cell edge users and the cell center users. The method comprises the following steps of: dividing time-frequency resources into a first resource group and a second resource group and dividing the first resource group and the second resource group into a plurality of resource blocks; configuring master resources and auxiliary resources in the first resource group for the cells and configuring the master resources and the auxiliary resources in the second resource group for the cells according to the plurality of resource blocks; and allocating the master resources in the first resource group and the second resource group to the cell edge users and allocating the auxiliary resources in the first resource group and the second resource group to the cell center users. Through the method and the device, interference among the cells is avoided, simultaneously the service requirements of the users on delay requirement, bandwidth and the like are met and the communication quality of the cell edge users is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for resource allocation in an OFDM / MIMO system. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplex, Orthogonal Frequency Division Multiplex) technology has the advantages of improving spectral efficiency, resisting frequency selective fading or narrowband interference, and has become one of the transmission technologies of the next generation wireless communication system. [0003] The MIMO (Multiple Input Multiple Output) technology based on multiple antennas can not only increase system capacity, but also can be used to improve channel reliability and reduce BLER (Block Error Rate, block error rate). Through continuous development and research in recent years, the increasingly mature MIMO technology has become one of the key technologies in the field of wireless communication, and will be applied to B3G / 4G (Beyond 3 Ge...

AI Technical Summary

Problems solved by technology

[0009] On the one hand, since soft frequency / time multiplexing adopts resource division in a single frequency domain and a single time domain, the available bandwidth or available time period in the edge area is largely limited, resulting in flexible resource allocation. On the other hand, if there are some users in the system who have strict requirements on bandwidth or delay, it may cause QoS (Quality of Service, quality of service) to be unable to be satisfied

[0010] In addition, in wireless communication systems, the communication quality of cell edge users is not only affected by inter-cell interference, but also has long-term errors caused by communication environmental factors such as excessive moving speed, building occlusion, and excessive distance from the base station. The block rate, packet loss rate is too high, or the number of retransmissions is too high, etc.

However, the above-mentioned problems of cell edge users may not be solved if only the optimization and limitation of time-frequency resources are used, and the communication quality of cell edge users needs to be improved.

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