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Load Balancing by Dynamic Base Station Relay Station Associations in Cellular Networks

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2 Author(s)
Zexi Yang ; Tsinghua National Laboratory for Information Science and Technology, Dept. of Electronic Engineering, Tsinghua University, Beijing 100084, China ; Zhisheng Niu

In this paper, we propose a relay-assisted load balancing scheme in cellular networks. The relay stations can be dynamically associated with different base stations. The load transferring from over-loaded cells to neighboring under-loaded cells is realized by dynamically changing the base station-relay station associations. A distributed algorithm, in which each relay station only needs to exchange information with its neighboring base stations and makes a re-association decision by itself, is proposed. Simulation results show that the overall call blocking probability can be reduced significantly when our distributed algorithm is applied.

Published in:

IEEE Wireless Communications Letters  (Volume:2 ,  Issue: 2 )