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Method and apparatus for group communication with end-to-end reliability

一种可靠性、备份的技术，应用在分局提供特种业务的装置、通过路径配置进行数据交换、数字传输系统等方向，能够解决方案存在可缩放性等问题

Inactive Publication Date: 2007-05-16
INT BUSINESS MASCH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These schemes thus suffer from scalability issues

Method used

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  • Method and apparatus for group communication with end-to-end reliability
  • Method and apparatus for group communication with end-to-end reliability
  • Method and apparatus for group communication with end-to-end reliability

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Embodiment Construction

[0026] Reliable group communication requires simultaneous delivery of the same content from a single source to multiple end users in an efficient manner. Broadcasting of content is made efficient by utilizing a multicast tree structure in which each node of the tree replicates the packets it receives from its parent node and sends one of the replicated packets to each of its child nodes. In contrast to inherently reliable Internet Protocol ("IP") multicast, where the nodes of the tree are Internet routers and require specialized routing and control mechanisms, multicast overlay uses where the nodes are actual end systems or end users and only requires A tree of currently available point-to-point connections between them.

[0027] An edge in an overlay network tree represents a path between the two nodes it connects. Although the path may pass through several routers in the physical network, the level of abstraction used in a multicast overlay network treats the path as a dir...

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Abstract

The present invention addresses scalability and end-to-end reliability in overlay multicast networks. A simple end-system multicast architecture that is both scalable in throughput and reliable in an end-to-end way is used. In this architecture, the transfers between nodes use TCP with backpressure mechanisms to provide data packet transfers between intermediate nodes having finite-size forwarding buffers. There is also a finitesize backup buffer in each node to store copies of packets which are copied out from the receiver window to the forwarding buffers. These backup buffers are used when TCP connections are re-established to supply copies of data packets for the children nodes after their parent node fails, maintaining a complete sequence of data packets to all nodes within the multicast overlay network. The architecture provides end-to-end reliability, tolerates multiple simultaneous node failures and provides positive throughput for any group size and any buffer size.

Description

technical field [0001] The present invention relates to methods and devices for content delivery via application layer multicast with scalable throughput and guaranteed end-to-end reliability. Background technique [0002] In many applications, such as Internet-based content delivery networks, the preferred means of delivering information is multicast, which delivers information to a select group of hosts simultaneously. A set of standards currently exists to support multicasting in Internet Protocol ("IP") networks. However, overlay (or application layer) multicast has become an increasingly popular alternative to IP multicast for supporting networks. Although IP multicast is not universally available on the Internet and requires the assignment of globally unique IP addresses to each communication group, multicast coverage can be easily implemented on existing infrastructure and does not require any global group identifiers . [0003] At a high level of abstraction, an o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/18H04L12/28H04L12/56
CPCH04L47/263H04L12/1868H04L47/15H04L47/10H04L12/18H04L47/25H04L45/16H04L45/28
Inventor 刘震弗兰克斯·巴塞利奥古斯丁·查恩特里奥安托·里阿波夫
Owner INT BUSINESS MASCH CORP
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