KEYWORDS: Network architectures, Internet, Network security, Personal digital assistants, Data storage, Ions, Broadband telecommunications, Multimedia, Distributed computing, Binary data
We propose a P2P (peer-to-peer) overlay architecture, called IGN
(interest grouping network), for contents lookup in the DHC (digital
home community), which aims to provide a formalized
home-network-extended construction of current P2P file sharing
community. The IGN utilizes the Chord and de Bruijn graph for its
hierarchical overlay network construction. By combining two schemes
and by inheriting its features, the IGN efficiently supports
contents lookup. More specifically, by introducing metadata-based
lookup keyword, the IGN offers detailed contents lookup that can
reflect the user interests. Moreover, the IGN tries to reflect home
network environments of DHC by utilizing HG (home gateway) of each
home network as a participating node of the IGN. Through
experimental and analysis results, we show that the IGN is more
efficient than Chord, a well-known DHT (distributed hash
table)-based lookup protocol.
The Access Grid (AG) is a multi-party collaboration environment, where efficient media exchanges among remote
participants are supported by IP multicast. However, due to limited availability of native IP multicast service,
application-assisted multicast connectivity solutions are required in real operation of the AG. Recently, we have
proposed a UMTP (UDP Multicast Tunneling Protocol) based solution, named as AG Connector, which takes
advantage of UDP-based tunneling approach. In this paper, we extend this original AG Connector solution by
addressing multiple UMTP server coordination and other operational issues. The proposed extended multicast
connectivity solution can support increased number of AG nodes that even include nodes under NAT/Firewall-based
private networks.
We propose a proxy-based scheme for segment-based distributed
streaming services among UPnP(universal plug and play)-enabled
home networks. We design a "SHARE" module that extends HG (home
gateway) with a UPnP-compatible protocol. By relaying SSDP (simple
service discovery protocol) messages defined in the UPnP device
architecture, the SHARE module provides connectivity that is
needed to control other UPnP devices for streaming services among
home networks. To provide the streaming services, the SHARE module
tries to coordinate the distribution of streaming loads among
multiple senders by using many-to-one distributed streaming
service. It also tries to minimize the quality degradation of
streaming services based on the system and network resource status
of each sender by leveraging the UPnP QoS services. That is,
pre-allocation of HG resources according to the UPnP QoS services
can be used to improve the quality of streaming services. Based on
the UPnP components, the SHARE module provides the transparent
content sharing to users. Through design-level verifications and
partial implementations of the proposed SHARE module, we validate
the feasibility of our work.
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