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Asynchronous phase synchronization in uniform unidirectional rings

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3 Author(s)
Shing-Tsaan Huang ; Dept. of Comput. Sci. & Inf. Eng., Nat. Central Univ., Chung-li, Taiwan ; Tzong-Jye Liu ; Su-Shen Hung

We propose a self-stabilizing asynchronous phase synchronization protocol for uniform unidirectional rings. Consider applications with phase bound K, i.e., the phases are phase 0, phase 1, ...; phase K-1, phase 0, phase 1, etc. Under the protocol, when the ring is stabilized, it satisfies the following criterion: No node begins to execute phase (k+1) mod K until all nodes have executed phase k, and after all nodes have executed their phase k, each node eventually executes phase (k+1) mod K. Besides the variable used to denote the phase that a node is working on, each node maintains only one auxiliary variable with b states, where b can be any number greater than or equal to the ring size. Provided that K and b satisfy the limitation: K×b>n(b-1), the proposed protocol is correct under the parallel model and takes at most 2(K×b) rounds to stabilize.

Published in:

Parallel and Distributed Systems, IEEE Transactions on  (Volume:15 ,  Issue: 4 )

Date of Publication:

April 2004

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