Preventing Service Discovery Cache Reply Storms in Wireless Mesh Networks

Abstract

This paper focuses on the problem of controlling service discovery cache reply storms in Wireless Mesh Networks (WMNs). A reply storm could occur if the same redundant service reply is sent from multiple nodes where every node uses a different message sequence number. Currently, this problem cannot be detected by existing approaches which inspect only certain header information. To overcome this problem an application-layer routing is mandatory which inspects also the message body. We describe different message propagation strategies together with our implementation of a service discovery protocol for Wireless Mesh Networks which consists of encapsulated Multicast DNS messages in a new OLSR message type. The measurements performed in the department’s wireless mesh testbed are discussed with results at the end.