Method for maintaining address compression control table in 6LoWPAN (lowpan) protocol

Abstract

The invention discloses a method for maintaining an address compression control table in a 6LoWPA (lowpan) protocol. The method comprises the following steps of: storing a control table and an address cache table in a coordinator node, and sending a message comprising an Internet protocol version 6 (IPV6) address prefix to be updated to the control table in the address cache table and a corresponding index number character identifier (CID) in the control table to an adjacent child node by the coordinator node; updating the corresponding address in a top linked control table by using the message through an intermediate node in the coordinator child node, sending acknowledgment information to the coordinator code, and forwarding the message to the child node connected with the intermediate node; updating the local corresponding address by using the message and sending acknowledgment information to the intermediate node through the child node, and updating the corresponding address in a bottom linked control table after the intermediate node receives the acknowledgment information of all the adjacent child nodes; and updating the corresponding address in the control table after the coordinator node receives the acknowledgment information of all the adjacent child nodes. Therefore, according to the method disclosed by the invention, time delay and load of a network are reduced.

Description

technical field [0001] The invention belongs to the technical field of IPv6-based low-speed wireless personal area network, and in particular relates to a method for maintaining an address compression control table in a 6LoWPAN protocol. Background technique [0002] In order to better understand the background technology of the present invention, you can refer to the following technical materials: [0003] [1] RFC 4944, Transimission of IPv6 Packets over IEEE802.15.4 Networks [0004] [2] draft-ietf-6lowpan-hc-07, Compression Format for IPv6 Datagrams in 6LoWPAN Networks [0005] [3] draft-ietf-6lowpan-nd-09, Neighbor Discovery Optimization for Low-power and Lossy Networks [0006] A Wireless Personal Area Network (WPAN) is a connectionless personal area network. In July 2003, IEEE launched the IEEE802.15.4 technical standard for LR-WPAN. This protocol mainly defines the protocols of the physical layer (PHY) and the media access control layer (MAC). The main applications...

AI Technical Summary

Problems solved by technology

However, the introduction of the CONTEXT table itself requires management overhead, which increases the management data traffic in the entire network.

Especially for the update of CONTEXT entries, every update of CONTEXT needs to ensure that the updated items can be synchronized to the nodes of the entire network, thus causing an objective increase in network traffic

On the other hand, if the update algorithm of the CONTEXT table item is not well designed, it may cause frequent update of table items when the network traffic bursts, thereby increasing the network load.

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