- タイトル
- クラスタツリー型ワイヤレスネットワークにおけるSS-CSMA/CA方式の提案と特性解析
Performance of SS-CSMA/CA for cluster-tree wireless networks
- 著者
- 小畠直人, 高岸智, 山尾泰
N.Kobatake, S.Takagishi, Y.Yamao
- 出典
- 信学技報RCS, no.RCS2008-266,
2009/03.
- キーワード
- ad-hoc network, DS-CDMA, CSMA/CA, multiuser detection, capture effect, multi-code CDMA, throughput, topology, packet error probability, hidden terminal
- 概要
- Cluster-tree networks are suitable for realizing large-scale wireless ad hoc networks, because they can be built and managed hierarchically. However, the cluster-tree networks frequently suffer from bottleneck at a network coordinator. Another issue is decrease of throughput due to interference from hidden terminals. In this paper, combination of CSMA/CA and spread-spectrum multiple-access (SSMA) with multicode reception is proposed as a MAC protocol for ad hoc networks. This method also employs a hybrid spreading code method and a career sense method after de-spreading for improving SSMA performance. Throughput and packet success probability for the proposed method are analyzed via simulations assuming the IEEE 802.15.4/ZigBee. Simulation results show that the throughput is remarkably improved and the bottleneck at a network coordinator is mitigated with the proposed method.
- 分類
- [SST]CDMAセルラー方式：マルチコード (No.6378)