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Content request and transmission method and system for content-centric network

A content-centric network and content request technology, applied in transmission systems, electrical components, etc., can solve the problem of not realizing multi-point parallel transmission of data blocks, and achieve the effect of optimizing user data request mode and minimizing data transmission time

Inactive Publication Date: 2018-03-02
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0009] However, this transmission scheme of CCN does not realize multi-point parallel transmission at the data block level.

Method used

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  • Content request and transmission method and system for content-centric network
  • Content request and transmission method and system for content-centric network
  • Content request and transmission method and system for content-centric network

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Embodiment Construction

[0021]In the content-centric network, the distribution of data blocks is affected by many factors. These factors include, caching strategy, existing cross traffic, content popularity and cache size. For example, heavy cross-traffic, small cache size, popular content, and cache strategies adopted, such as random cache or probability-based cache, will all cause changes in the distribution of data blocks. For users, the distribution of data blocks cannot be predicted, so the data request mode cannot be effectively optimized.

[0022] The present invention proposes a "receiver-driven content node detection mechanism", which is a mechanism for discovering and learning the distribution of data blocks in the network. In this embodiment, two new types of messages are proposed for the content-centric network, probe message (Probe) and feedback message (Feedback), plus two types of messages Interest message (Interest) and data message that the content-centric network itself has (Data)...

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Abstract

The present invention relates to a content request and transmission method and system of a content-centric network. The method includes the following steps: A. receiving a detection message sent by a user terminal; B. sending feedback information to the user terminal; C. receiving information broadcast by the user terminal about Content interest message; D. Respond to the interest message and return a message containing the data desired by the user. The present invention can implement distributed dynamic content request and transmission scheme scheduling and sending messages by setting detection messages and feedback messages, can make full use of dynamic cache routers and source servers in content-centric networks, and realize multi-point parallel transmission mechanisms based on data blocks , optimize the user data request mode, and minimize the data transmission time.

Description

technical field [0001] The invention relates to a content request and transmission method and system in a content-centric network (Content Centric Network, CCN), belonging to the field of computer Internet. technical background [0002] Since the birth of the Internet, it has developed rapidly. With the expansion of scale, the existing Internet architecture and communication mode are facing huge challenges. The first category of Internet applications such as file transfer and remote login is mainly focused on end-to-end communication. The user explicitly instructs the source host to communicate with another host, and the only function of the network is to transmit the packet carrying the destination address in the header. The current network architecture is based on the end-to-end transmission mode. One end of the communication needs to obtain the IP address of the opposite end to establish a connection to achieve communication. This structure is very suitable for communic...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08
Inventor 李清江勇夏树涛甘斌
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV