Proposal for Radio Resource Allocation Using Dummy Burst Definition in IEEE 802.16 Uplinks

In IEEE 802.16 uplinks, the permutation of data on a frequency domain is performed when logical subchannels are transformed to physical subchannels to scatter deterioration of the radio propagation environment via inter-cell interference. However, it is ideal from the viewpoint of evading interference to completely divide the radio resource between the interfering cells, when there is comparatively low traffic among the cells. In this paper, the authors propose a novel concept for the definition of bursts in the uplinks. It is that a BS defines UL bursts for an imaginary user. Based on this idea, the BS can assign subchannels to users while generating blank logical subchannels between used logical subchannels in uplinks, which could not be realized in conventional ideas. Furthermore, the authors propose a radio resource allocation scheme to successfully avoid inter-cell interference based on this concept. Numerical analysis showed that the proposed method suppresses the interference between adjacent cells and that throughput performance can improve.