An Interference Aware Distributed Resource Management Scheme for CDMA-Based Wireless Mesh Backbone

Abstract

Abstract-In this paper, with a cross-layer design principle, we propose an interference aware distributed resource management scheme for a code-division multiple access (CDMA)-based wireless mesh backbone (consisting of a number of wireless routers at fixed sites). Specifically, benefiting from the fixed location of wireless routers, the power allocation is based on the length of the transmission path, so as to ensure a certain level of fairness among the routers. For a new call arrival, based on the maximum sustainable interference concept, each existing receiver (rather than the potential sender) estimates its experienced interference level under the hypothesis that the new call is admitted. If the interference is not tolerable, the existing receiver rejects the new call by sending a blocking-signal. The main advantages of our proposed scheme are the low control message overhead for easy implementation, and the accurate interference estimation. Simulation results are presented to evaluate the performance of our scheme.Index Terms-CDMA, cross-layer design, resource management, wireless mesh networks.

A distributed MAC scheme supporting voice services in mobile ad hoc networks

“…Thus in this research we consider a code-division multiple access (CDMA)-based mobile ad hoc network, in which the air interface supports multiple simultaneous transmissions in a neighborhood. In our previous work [9], we have proposed a MAC scheme for a CDMA-based wireless mesh backbone, referred to as the MESH scheme here. Before DATA ‡ transmissions, each potential sender first transmits a low-power probe to the network.…”

“…So in the request message, node i indicates (among ¶ Here an active receiver can be an existing traffic destination node for DATA reception, or an existing traffic source node for ACK reception. # Unlike the scheme considered in Reference [9] in which a busy tone is used over a separate control channel, the blocking message in our scheme is sent in the data channel, thus avoiding additional hardware cost to implement the busy-tone channel.…”

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