Streaming in MANET: Proactive Link Protection and Receiver- Oriented Adaptation 學生 : 黃群凱 作者 :Toby Xu; Ymg Cai; 出處 : IEEE Internationa, Computing, and Communications Conference, pp /11/25 1

Outline Introduction Proposed Streaming Protocol Performance Study Related Work Concluding Remarks 2015/11/25 2

Introduction A mobile ad hoc network (MANET) consists of a set of mobile devices that communicate with each other through wireless packet relaying. A MANET can be set up quickly at a minimal cost. 2015/11/25 3

Introduction Live streaming has strict requirement on continuous data delivery. Because of host mobility, a routing path used by the current data packet may become unavailable for the next one. 2015/11/25 4

Introduction This path is then maintained using two innovative techniques, proactive link protection (PLP) and receiver-oriented adaptation (ROA). ▫PLP:each host in a streaming path monitors the robustness of its connection. ▫ROA:makes it possible to maintain a highquality streaming path. 2015/11/25 5

Proposed Streaming Protocol Proactive Link Protection 2015/11/25 6 This technique is aimed at replacing a link that is about to break by proactively looking for an alternative one. They coincidentally designate a same backup route, which may be overloaded with the network traffic and may cause much queueing delay.

Proposed Streaming Protocol Receiver-Oriented Adaptation 2015/11/25 7 The initial route discovered by techniques such as DSR or AODV is likely to be the shortest.

Performance Study 2015/11/25 8

Performance Study Effect of Host Mobility 2015/11/25 9

Performance Study Effect of Host Transmission Range 2015/11/25 10

Performance Study Effect of Host Density 2015/11/25 11

Performance Study Effect of ROA on Route Length 2015/11/25 12

Related Work Routing protocols for MANET can be classified into three categories ▫proactive ▫Reactive ▫Hybrid Reactive routing protocols usually have higher data delivery radio and incur less routing overhead than proactive ones 2015/11/25 13

Related Work In existing reactive protocols, a host finding a broken link either finds an alternative route itself or notifies the source to initiate a route rediscovery. Multi-path routing tries to redirect the network traffic to a backup path when the current path is broken. 2015/11/25 14

Related Work The idea is to first find a path from sender to receiver, and then along this path, construct a mesh-like corridor. Since a stream can flow through different paths which are not necessarily disjointed, this technique reduces the packet loss rate and may survive multiple link failures. 2015/11/25 15

Concluding Remarks High continuity: Our proactive link protection minimizes the chance of streaming interruption caused by host mobility. Low end-to-end delay: Our receiver-oriented adaptation makes a streaming path as straight as possible. 2015/11/25 16