Paper Info
Title
Delivering live multimedia streams to mobile hosts in a wireless internet with multiple content aggregators
Abstract
We consider the distribution of channels of live multimedia content (e.g., radio or TV broadcasts) via multiple content aggregators. In our work, an aggregator receives channels from content sources and redistributes them to a potentially large number of mobile hosts. Each aggregator can offer a channel in various configurations to cater for different wireless links, mobile hosts, and user preferences. As a result, a mobile host can generally choose from different configurations of the same channel offered by multiple alternative aggregators, which may be available through different interfaces (e.g., in a hotspot). A mobile host may need to handoff to another aggregator once it receives a channel. To prevent service disruption, a mobile host may for instance need to handoff to another aggregator when it leaves the subnets that make up its current aggregator's service area (e.g., a hotspot or a cellular network).In this paper, we present the design of a system that enables (multi-homed) mobile hosts to seamlessly handoff from one aggregator to another so that they can continue to receive a channel wherever they go. We concentrate on handoffs between aggregators as a result of a mobile host crossing a subnet boundary. As part of the system, we discuss a lightweight application-level protocol that enables mobile hosts to select the aggregator that provides the 'best' configuration of a channel. The protocol comes into play when a mobile host begins to receive a channel and when it crosses a subnet boundary while receiving the channel. We show how our protocol can be implemented using the standard IETF session control and description protocols SIP and SDP. The implementation combines SIP and SDP's offer-answer model in a novel way.
Year
DOI
Venue
2005
10.1007/s11036-005-6426-0
MONET
Keywords
Field
DocType
multimedia content distribution,wireless networking,mobility
Wireless network,Mobile search,Wireless,News aggregator,Computer science,Computer network,Communication channel,Subnet,Cellular network,Handover,Distributed computing
Journal
Volume
Issue
ISSN
10
3
1383-469X
Citations 
PageRank 
References 
2
0.42
34
Authors
4
Name
Order
Citations
PageRank
Cristian Hesselman115021.01
Henk Eertink214625.83
Ing Widya39018.52
Erik Huizer4163.97