Adaptive Channel Access Mechanism for Zigbee (IEEE 802.15.4) | Zendy

Vaddina Prakash Rao | Zendy; Dimitri Marandin | Zendy

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Adaptive Channel Access Mechanism for Zigbee (IEEE 802.15.4)

Author(s) -

Vaddina Prakash Rao,

Dimitri Marandin

Publication year - 2017

Publication title -

journal of communications software and systems

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.191

H-Index - 13

eISSN - 1846-6079

pISSN - 1845-6421

DOI - 10.24138/jcomss.v2i4.273

Subject(s) - computer science , computer network , carrier sense multiple access with collision avoidance , ieee 802.15 , channel (broadcasting) , access control , wireless , distributed coordination function , network packet , ieee 802.11 , network allocation vector , wireless network , exponential backoff , throughput , wireless sensor network , telecommunications

The IEEE 802.15.4 (also known as Zigbee) is a new wireless personal area network (PAN) standard designed for wireless monitoring and control applications. The Zigbee standard is based on CSMA-CA for contention based medium access. In this paper a study of the Adaptive backoff exponent (BE) management of CSMA-CA for 802.15.4 is presented. The BEs determine the number of backoff slots that the device shall wait before accessing the channel. The power consumption requirements make CSMA-CA use fewer BEs which increase the probability of devices choosing identical BEs and as a result, wait for the same number of backoff slots in some cases. This often leads to degradation of system performance at congestion scenarios, due to higher number of collisions. This paper addresses the problem by proposing an adaptive mechanism to the current implementation of the backoff exponent management, based on a decision criterion. As a result of the implementation, potential packet collisions are reduced. The results of NS-2 simulations are presented, indicating an overall improvement in network performance.

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