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Detail
Journal Article
Distributed Synchronization for OFDMA-Based Wireless Mesh Networks
- Authors
- Jihyung Kim, Jung-Hyun Kim, Kwangjae Lim
- Issue Date
- 2014-02
- Citation
- ETRI Journal, v.36, no.1, pp.1-11
- ISSN
- 1225-6463
- Publisher
- 한국전자통신연구원 (ETRI)
- Language
- English
- Type
- Journal Article
- Abstract
- In this paper, we propose a distributed synchronization algorithm for wireless mesh networks based on orthogonal frequency division multiple access. For time and frequency synchronization, a node requests its neighbor nodes for a change of fast Fourier transform starting points, transmission times, and carrier frequencies needed for synchronization. The node also updates its own time and frequency elements through simple formulas based on request messages received from neighbor nodes using a guard interval and a cyclic prefix. This process with the cooperation of neighbor nodes leads to a gradual synchronization of all nodes in the network. Through a performance comparison with a conventional scheme, we obtain simulation results indicating that the proposed scheme outperforms the conventional scheme in random topologies and a grid topology. © 2014 ETRI.
- KSP Keywords
- Cyclic prefix(CP), Fast Fourier transform, Frequency division multiple access(FDMA), Grid Topology, Orthogonal Frequency Division Multiple Access(OFDMA), Performance comparison, Random Topologies, Wireless Mesh Network, distributed synchronization algorithm, guard interval, simulation results