Method and system for mobility management of sensor network node

Abstract

The invention provides a method and a system for mobility management of a sensor network node. When a network gateway related to the network of the sensor detects that the a sensor node is shifted, a position updating request is sent to a control device at a network side; when the control device updates the information of sensor node corresponding to the network gateway accessed the network, a position upgrading confirmation message is sent to the network gateway to implement position updating according to the confirmation message from the control device, as well as upgrading a mapping relation between the addressable information in the sensor network corresponding to the sensor node and the addressable information in the access network. The technical proposal of the invention focuses on the technical limitation on the sensor network and the node thereof, and the network side performs mobile position upgrading to the sensor network node, and therefore desirable expansibility and easy implementation can be achieved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and system for mobility management of sensor network nodes. Background technique [0002] Sensor network is a comprehensive intelligent information system integrating wireless technology, embedded technology and sensor network technology. It can be used in many fields such as public safety, ecological environmental protection, emergency command, intelligent transportation, anti-terrorism, and smart home. For example, the sensor / controller network in the smart home, the collection of various parameters on the industrial site, and the unified network regulation of the controller can all be realized through the sensor network. [0003] For the mobility management of sensor network nodes, regardless of whether the sensor node is usually connected to the network through wired media or wireless media, when the sensor node moves, no matter where the mobile device is actu...

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Problems solved by technology

[0010] 2), MIPv6 and HMIPv6 are implemented through the mobility management protocol, the host needs to modify the traditional TCP and IP protocol stack structure, and the sensor node needs to modify its own protocol stack structure to support MIPv6 and HMIPv6, which is not practical enough

[0011] 3) Under MIPv6, all the data packets between the mobile 6LoWPAN sensor node and its communication node CN need to be transmitted to it through the home agent HA in the form of a communication tunnel, which is expensive and inefficient for sensor node design

[0012] 4), both MIPv6 and HMIPv6 need to perform Duplicate Address Detection (DAD) operation, which will result in a switching delay of about 1 second, which is unacceptable for some burst applications

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