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Graph coloring theory based method for eliminating interference among coexisting Wireless Body Area Networks (WBANs)

A wireless body area network, interference cancellation technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve the problem of not considering the diversity of data collected by sensor nodes

Active Publication Date: 2018-11-30
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, this method is only suitable for the star topology in the body area network, and does not consider the diversity of data collected by sensor nodes with different functions in the body area network.

Method used

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  • Graph coloring theory based method for eliminating interference among coexisting Wireless Body Area Networks (WBANs)
  • Graph coloring theory based method for eliminating interference among coexisting Wireless Body Area Networks (WBANs)
  • Graph coloring theory based method for eliminating interference among coexisting Wireless Body Area Networks (WBANs)

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] Implementation:

[0038] This embodiment is based on the Figure 4 The network topology shown in (a) is described, and the specific workflow is as follows:

[0039] 1. Interference map construction:

[0040] (1) When it is the i-th sensor node s in the k-th personal area network ki When establishing the interference set, s ki is the source node, firstly find the ratio sensor node s in the k-th individual area network ki To the coordinator C in this network k closer nodes, and then find the same node s among these nodes ki The distance of is less than node s ki to coordinator C k and...

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Abstract

The invention discloses a graph coloring theory based method for eliminating interference among coexisting Wireless Body Area Networks (WBANs). The method comprises two stages of interference graph construction and graph coloring, wherein in the stage of interference graph construction, firstly, an uplink communication mode of a source node and a home network internal coordinator is determined tobe a direct transmission mode or a mode of carrying out forwarding by utilizing a relay; and then with reference to an interference node at the longest distance from a receiving end corresponding to the source node, an interference set is established for the source node by measuring interference signal intensity of the interference node. In the stage of graph coloring, different time slots are mapped into different colors, and firstly, inter-network interference is relieved by allocating different colors to the nodes interfering with each other; and then according to the diversity of data acquired by the sensor nodes, various colors are allocated to the nodes with a high requirement for a data transmission rate so as to further improve Quality-of-Service (QoS), resource utilization rates and network capabilities of the networks.

Description

technical field [0001] The invention relates to the technical field of wireless communication, and relates to a method for eliminating interference between coexisting wireless body area networks based on graph coloring theory. Background technique [0002] Wireless body area network (wireless body area network: WBAN) is a network attached to the human body, which consists of multiple sensor nodes that collect different physiological parameters of the human body and a coordinator. The coordinator is usually a smart device such as a mobile phone or a tablet computer that is conveniently carried by the user. It can collect physiological information from sensor nodes in the network, and send it to a remote control terminal, such as a hospital or a family member, through an external network after fusion processing. Wireless body area network is generally used in medical health monitoring, motion recognition, entertainment, military and other aspects. [0003] Due to human sociab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04
CPCH04W28/04
Inventor 孙咏梅王静贤纪越峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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