The room shortage problem of tree-based ZigBee/IEEE 802.15.4 wireless networks

  • Authors:
  • Li-Hsing Yen;Wei-Ting Tsai

  • Affiliations:
  • Department of Computer Science and Information Engineering, National University of Kaohsiung No. 700, Kaohsiung University Rd., Kaohsiung 811, Taiwan, ROC;Department of Computer Science and Information Engineering, Chung Hua University No. 707, Sec. 2, WuFu Rd., Hsinchu 300, Taiwan, ROC

  • Venue:
  • Computer Communications
  • Year:
  • 2010

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Abstract

A number of IEEE 802.15.4 devices can form a tree topology as proposed by ZigBee specification. The ability to confine the shape and extent of the tree serves as the basis for address configuration and packet routing. This paper identifies the room shortage problem in tree-based ZigBee networks, which refers to the phenomenon that some devices are unable to get addresses while many addresses are still left unused. Room shortage problem occurs when pre-allocated address space does not well match the underlying physical topology. To alleviate the problem, we developed three alternatives to the standard addressing mechanism. These approaches manage address space with flexibility yet still support tree-based routing. Performance evaluations indicate that proposed approaches provide different levels of tradeoff between the ratio of addressable devices and storage overhead.