Summary

Asia-Pacific Conference on Communications

2008

Session Number:15-AM2-D

Session:

Number:1569129025

Opportunistic Packet Scheduling Algorithm for Load Balancing in a Multi-hop Relay-enhanced Cellular OFDMA-TDD System

Tae W. Kim,  Tae-Young Min,  Chung G. Kang,  

pp.-

Publication Date:2008/10/14

Online ISSN:2188-5079

DOI:10.34385/proc.27.1569129025

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Summary:
In this paper, we consider a multi-hop relay-enhanced cellular OFDMA-TDD system with the full frequency-reuse capability, in which a TDD frame can be asymmetrically divided into two different intervals, one for access link to mobile stations and the other for relay link to base station (BS)-relay station (RS) communication, while the same radio resource is fully reused by every RS in the cell. Since a single common boundary between access and relay links is employed for the system, some access link associated with an individual RS can be either overloaded or under-loaded when traffic load is non-uniformly distributed, which causes an inefficient resource allocation. This paper proposes a load-balancing opportunistic (LoBO) scheduling algorithm that improves the overall system throughput in a weighted proportional fairness manner while balancing the traffic load over the access link to be shared by all RS’s. The proposed algorithm dynamically determines the common access-to-relay interval boundary as a part of packet scheduling, which has been shown to outperform the conventional system in which the boundary selection and packet scheduling are implemented as the separate processes.