The design philosophy of the DARPA internet protocols
SIGCOMM '88 Symposium proceedings on Communications architectures and protocols
Receiver-driven layered multicast
Conference proceedings on Applications, technologies, architectures, and protocols for computer communications
Mobile IP: the Internet unplugged
Mobile IP: the Internet unplugged
An active service framework and its application to real-time multimedia transcoding
Proceedings of the ACM SIGCOMM '98 conference on Applications, technologies, architectures, and protocols for computer communication
Vertical handoffs in wireless overlay networks
Mobile Networks and Applications - Special issue: mobile networking in the Internet
WOWMOM '99 Proceedings of the 2nd ACM international workshop on Wireless mobile multimedia
End-to-end arguments in system design
ACM Transactions on Computer Systems (TOCS)
Application level hand-off support for mobile media transcoding sessions
NOSSDAV '02 Proceedings of the 12th international workshop on Network and operating systems support for digital audio and video
MarconiNet supporting streaming media over localized wireless multicast
WMC '02 Proceedings of the 2nd international workshop on Mobile commerce
Broadcasting Multimedia Channels in Future Mobile Systems
PROMS 2001 Proceedings of the 6th International Conference on Protocols for Multimedia Systems
Policy-Enabled Handoffs Across Heterogeneous Wireless Networks
WMCSA '99 Proceedings of the Second IEEE Workshop on Mobile Computer Systems and Applications
Inter-Operator Roaming Scenarios for Third Generation Mobile Telecommunication Systems
ISCC '97 Proceedings of the 2nd IEEE Symposium on Computers and Communications (ISCC '97)
Migratory TCP: Connection Migration for Service Continuity in the Internet
ICDCS '02 Proceedings of the 22 nd International Conference on Distributed Computing Systems (ICDCS'02)
Supporting Multimedia Service Polymorphism in Dynamic and Heterogeneous Environments
Supporting Multimedia Service Polymorphism in Dynamic and Heterogeneous Environments
Reconsidering Internet Mobility
HOTOS '01 Proceedings of the Eighth Workshop on Hot Topics in Operating Systems
Multimedia QoS Adaptation for Inter-tech Roaming
ISCC '01 Proceedings of the Sixth IEEE Symposium on Computers and Communications
A receiver-centric transport protocol for mobile hosts with heterogeneous wireless interfaces
Proceedings of the 9th annual international conference on Mobile computing and networking
A generic business model for WLAN hotspots: a roaming business case in The Netherlands
Proceedings of the 1st ACM international workshop on Wireless mobile applications and services on WLAN hotspots
Scattercast: an adaptable broadcast distribution framework
Multimedia Systems
Fine-grained failover using connection migration
USITS'01 Proceedings of the 3rd conference on USENIX Symposium on Internet Technologies and Systems - Volume 3
Access network evolution beyond third generation mobile communications
IEEE Communications Magazine
Evolution toward reconfigurable user equipment
IEEE Communications Magazine
Supporting real-time IP multimedia services in UMTS
IEEE Communications Magazine
Measurements of SIP signaling over 802.11b links
Proceedings of the 3rd ACM international workshop on Wireless mobile applications and services on WLAN hotspots
Hi-index | 0.03 |
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.