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Communication Complexity of Quasirandom Rumor Spreading

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Berenbrink, P 
Elsässer, R 
Sauerwald, T 

Abstract

We consider rumor spreading on random graphs and hypercubes in the quasirandom phone call model. In this model, every node has a list of neighbors whose order is specified by an adversary. In step i every node opens a channel to its ith neighbor (modulo degree) on that list, beginning from a randomly chosen starting position. Then, the channels can be used for bi-directional communication in that step. The goal is to spread a message efficiently to all nodes of the graph.For random graphs (with sufficiently many edges) we present an address-oblivious algorithm with runtime O(logn) that uses at most O(nloglogn) message transmissions. For hypercubes of dimension logn we present an address-oblivious algorithm with runtime O(logn) that uses at most O(n(loglogn)2) message transmissions.Together with a result of Elsässer (Proc. of SPAA’06, pp. 148–157, 2006), our results imply that for random graphs the communication complexity of the quasirandom phone call model is significantly smaller than that of the standard phone call model.

Description

Keywords

Journal Title

Algorithmica

Conference Name

Journal ISSN

0178-4617
1432-0541

Volume Title

72

Publisher

Springer Nature