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- Title
Analysis of Fairness Problem for IEEE 802.15.6 Slotted Aloha Algorithm.
- Authors
Yoo, Sangbong; Kim, Kichang
- Abstract
The IEEE 802.15.6 slotted Aloha protocol defines a contention based medium access mechanism for wireless body area network (WBAN). However the proposed scheme can cause a high collision rate when the number of nodes increases, thus decreasing overall throughput severely, especially in saturated traffic. In order to decrease collision rate, we can modify the protocol such that the contention probability of each node can be decreased as small as possible when the collision is repeated. This modification decreases the collision rate considerably improving the overall throughput, but with the sacrifice of fairness resulting in the starvation of some of the nodes. Recently, an algorithm, called Beta-decrement algorithm, has been proposed, which shows a reasonable amount of throughput while maintaining relatively good fairness among nodes. In this paper, we rigorously analyze the relationship between the throughput and fairness in the modified slotted aloha algorithm, and show why conventional solutions could not satisfy both requirements simultaneously but the Beta-decrement algorithm can.
- Subjects
BODY area networks; IEEE 802 standard; TELECOMMUNICATION traffic; PROBABILITY theory; MARKOV processes
- Publication
Wireless Personal Communications, 2018, Vol 102, Issue 1, p559
- ISSN
0929-6212
- Publication type
Article
- DOI
10.1007/s11277-018-5858-3