Enabling Real-Time H.264 Video Services over Wireless Ad Hoc Networks Using Joint Admission and Transmission Power Control

Abstract

In a wireless ad hoc network, packets are sent from node-to-node in a multihop fashion until they reach the destination. In this paper we investigate the capacity of a wireless ad hoc network in supporting packet video transport. The ad hoc network consists of n homogeneous video users with each of them also serving as a relay node for other users. We investigate how the time delay affects the video throughput in such an ad hoc network and how to provide a time-delay bounded packet video delivery service over such a network. The analytical results indicate that appropriate joint admission and power control have to be employed in order to efficiently utilize the network capacity while operating under the delay constraint as the distance between source and destination changes.

Distributed Flow Admission Control for Multimedia Services Over Wireless Ad Hoc Networks

“…Notice that Eq. (2) is not constrained by 'L' as in [15], since a source node or a relay node in the wireless ad hoc network should be capable of reserving transmission rate for a traffic flow by itself. This paper assumes that the underlying routing protocol (such as DSR [14]) can adequately provide W (k), whereas the c(k) information can be obtained from the underlying MAC layer [5,8].…”

“…the nodes can generate different kinds of traffic such as data, audio, video, etc. In contrast to [15], a node 'k' can communicate with a destination that is not a constant number of hops away. Node distribution in the network can be non-uniform.…”

“…Node distribution in the network can be non-uniform. Other assumptions which include the Interference Model (introduced as the Protocol Model in [16]) are the same as in [15].…”