Virtual Channel Management for Densely Deployed IEEE 802.15.4 LR-WPANs

  • Authors:

  • Tae Hyun Kim;Jae Yeol Ha;Sunghyun Choi;Wook Hyun Kwon

  • Affiliations:

  • Seoul National University, Seoul, Korea;Seoul National University, Seoul, Korea;Seoul National University, Seoul, Korea;Seoul National University, Seoul, Korea

  • Venue:
  • PERCOM '06 Proceedings of the Fourth Annual IEEE International Conference on Pervasive Computing and Communications
  • Year:
  • 2006

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Abstract

The number of channels specified for IEEE 802.15.4 Low-Rate Wireless Personal Area Networks (LR-WPANs) is too few to operate many applications of WPANs in the same area. To overcome this limit, we introduce Virtual Channel, a novel concept to increase the number of available channels when various WPAN applications coexist. A virtual channel is basically created via superframe scheduling within the inactive periods in a logical channel preoccupied by other WPANs. To maximize the coexistence capability of WPANs using virtual channels, we propose (1) Least Collision superframe scheduler (LC-scheduler), (2) less complex heuristics, and (3) Virtual Channel Selector (VCS) to efficiently manage multiple available logical channels. In addition, a simple but practical synchronization method is developed to compensate different time drifts among coexisting WPANs. The simulation results demonstrate that a remarkable improvement on the coexistence capability of the 802.15.4 can be achieved through the proposed schemes.