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CoAP (Constrained Application Protocol) proxy cache method based on node dormancy and router maintenance

A proxy caching and routing technology, applied in the field of network application layer, which can solve the problems of not fully considering changes in routing maintenance topology relationship, server inconvenience, and large storage space.

Active Publication Date: 2015-09-16
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing reverse proxy mechanism and cache mechanism of the CoAP protocol still have some deficiencies when applied to wireless networks where nodes are periodically dormant and routes are regularly maintained: they do not fully consider the scenario of topology changes caused by route maintenance, and lack the ability to A maintenance mechanism that effectively controls throughput and network delay; does not fully consider the time spent by users operating browsers, which brings inconvenience to users directly operating periodically dormant servers; proxy servers reflect the storage space consumed by changes in storage resources more

Method used

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  • CoAP (Constrained Application Protocol) proxy cache method based on node dormancy and router maintenance
  • CoAP (Constrained Application Protocol) proxy cache method based on node dormancy and router maintenance
  • CoAP (Constrained Application Protocol) proxy cache method based on node dormancy and router maintenance

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, the present invention will be further described:

[0039] First, combine figure 1 Work flow chart of the proxy caching mechanism, figure 2 The message interaction diagram of proxy cache mechanism and image 3 The working flow diagram of the method for maintaining the agency relationship of the present invention describes in detail the specific implementation of the resource server.

[0040]Step1: After the node is connected to the network, query the non-battery-powered and non-sleeping parent node in its routing table entry, obtain its link quality information (RSSI), and skip to Step2.

[0041] Step2: Select the parent node with the best link quality (maximum RSSI value) as the proxy server of the node, and skip to Step3.

[0042] Step3: The node can be used as the CoAP protocol resource server. If the number of agency relationship establishment responses with message code "4.01 Unauthorized" received consecutively d...

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Abstract

The invention relates to a CoAP proxy cache method based on node dormancy and router maintenance, and belongs to the technical field of application level. The CoAP proxy cache method is designed for the CoAP of resource limited IP network. The method comprises agency relation maintenance, cache resource information base maintenance and overdue approach detection, wherein overdue approach detection can reflect change of resource, occupies less storage resource, and provides convenience for user operation. The method comprises the advantages that support for node dormancy and route maintenance of the CoAP is enhanced, convenience is provided for operation of a periodic dormancy server, and the throughput and network time delay of a router can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of network application layers, and in particular relates to a CoAP protocol proxy cache method based on node sleep and route maintenance. Background technique [0002] The CoAP (Constrained Application Protocol) protocol was formulated by the CORE working group of the IETF. It is an application layer protocol standard based on the REST architecture formulated for resource-constrained IP networks. It has the advantages of small message header overhead, flexible format, and easy expansion. , Low analytical complexity and other advantages. [0003] The wireless sensor network is the key technology of the perception layer of the Internet of Things. It consists of a large number of distributed deployment and miniaturized embedded wireless communication devices. It has the characteristics of low cost, low power consumption, and limited storage and computing resources. Wireless sensor networks are suitable for app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04W84/18
CPCH04L67/101H04W84/18H04L67/56H04L67/5683
Inventor 王平蒲宬亘王恒鲍娜
Owner CHONGQING UNIV OF POSTS & TELECOMM
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