MANETs Routing Method for Calls with Predefined Duration in Audio/Video Communications

Abstract

Abstract. MANETs (Mobile Ad hoc Networks) are attracting attention as a useful means of communication in times when the communications network infrastructure has been disrupted by a widespread disaster. So far, audio/video services provided on MANETs have not been evaluated adequately. Audio/video communication generates large packet traffic, which rapidly reduces the battery levels of relaying terminals. This results in ongoing communication being interrupted due to a low battery level. This will lead to frequent disconnections and attempts to reestablish network routes at short intervals, resulting in degradation in communication quality. This paper studies a routing method that takes account of remaining battery levels in multimedia communication. Specifically, it proposes a routing method that establishes communication routes for calls with predefined communication duration, using only those terminals that have adequate remaining batter levels. The effectiveness of the proposed routing method has also been confirmed through communication quality evaluation by using a developed SIP_MANET emulator.

Route Availability as a Communication Quality Metric of a Mobile Ad Hoc Network

“…A variety of routing protocols have been proposed for MANETs [2][3][4][5][6][7][8][9][10][11][12][13], and various metrics have been used to assess their performance, such as packet delivery ratio (PDR), throughput, end-to-end delay, routing overhead, path length, packet loss rate, jitter, path lifetime, and mean opinion score (MOS). Table 1 lists metrics used in different references.…”

“…Routing overhead [2,5,7] is used for protocols that are designed to improve the performance and stability of the routes to be established but it does not indicate the quality of the routes established. Path lifetime [10,11], which is based on the remaining battery levels of relay nodes, is an important assessment metric but is not fit for assessing the nonuniformity (represented by repeated connections and disconnections) that the current paper focuses on.…”

“…These are designed for application to data communication after communication routes have been established, and thus are not necessarily a suitable metric to assess the communication quality for networks like MANETs in which routes are not uniform because they are constantly disconnected and re-established as a result of node mobility. Regarding communication route establishment, routing overhead [2,5,7], path length [2], and path lifetime [8,10,11] are used as metrics to assess the performance of routing protocols and routes. For applications such as video streaming, in which the user's quality of experience is important, jitter [6] and MoS (Mean Opinion Score) [9,12,13] are also used in addition to the above metrics.…”