Energy Efficiency Optimization Method for Wireless Body Area Networks Based on Independent Sets
A technology of a wireless body area network and an optimization method, which is applied in the field of wireless body area network resource allocation, can solve the problem that it is difficult to take into account the joint optimization of user QoS guarantee network resources, the time slot and power allocation network data transmission efficiency are not comprehensively considered, and the network data transmission efficiency cannot be realized. Overall performance optimization and other issues to achieve the effect of efficient utilization of QoS guarantee and efficient utilization of network resources
Active Publication Date: 2019-02-26
CHONGQING UNIV OF POSTS & TELECOMM
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[0005] Existing studies consider the transmission and sleep time slots of the scheduling coordinator under the common coverage of multiple body area networks in isolation, without comprehensively considering the time slots, power allocation and network data transmission efficiency of each node, and it is difficult to take into account user QoS guarantee and network resources. The joint optimization of the network cannot realize the overall performance optimization of the network
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[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0033] figure 1 It is a schematic diagram of a network scenario in which two body area networks coexist. Each body area network is composed of several sensor nodes and a coordinator. The coordinator is responsible for centralized scheduling and management of independent sets and power allocation of each node.
[0034] figure 2 It is a schematic flow diagram of a wireless body area network energy efficiency optimization method based on independent sets proposed by the present invention, as shown in the figure: the specific steps of this method are:
[0035] 201: Each body area network node sends a service request to its coordinator
[0036] In the network scenario where multiple body area networks coexist, each node in the body area network performs business requests and information transmission in units of frames, and the transmission ti...
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The invention relates to a performance optimizing method for a wireless body area network based on independent sets, and belongs to the technical field of the wireless body area network resource allocation. The method is characterized in that requesting service and transferring information by all nodes in the body area network based on one frame as a unit, dividing the transferring times of the frames into service requesting stage and information transferring stage; collecting the nodes service requests of the network by service requesting stage body area network coordinators, confirming node independent sets and allocating a transmit power after gathering node service requesting information by the coordinators. The method comprises the following detailed steps: (1) setting a power initial value for the nodes, confirming the node independent sets by the network coordinator based on characteristics of time slot transmission and interference, and establishing candidate matching schemes of the nodes and the independent sets; (2) confirming a local optimal power allocation scheme based on performance optimization of the node independent sets; (3) repeating the above steps until the condition of convergence is met, and therefore the node independent sets and a power optimizing allocation scheme are obtained. Accordingly, QoS of nodes is guaranteed and network resources are efficiently utilized.
Description
technical field [0001] The invention belongs to the technical field of wireless body area network resource allocation, and relates to an independent set-based wireless body area network energy efficiency optimization method. Background technique [0002] Wireless Body Area Network (WBAN) is a human-centered network composed of several wireless sensor nodes and one or more coordinators, which can pass various sensors placed around or inside the human body. The nodes sense and collect some important physiological parameters of the human body, and then send them to the remote server through wireless and wired methods, so as to effectively monitor the health status of the human body. WBAN has attracted widespread attention in recent years because of its portability and ease of data interaction management, and has been used in military, entertainment, consumer electronics, smart home, public services, especially healthcare and other fields. [0003] In the actual application of ...
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IPC IPC(8): H04W52/04H04W84/18
CPCH04W52/04H04W84/18
Inventor 陈前斌王盼盼柴蓉黄峥陈玉梅
Owner CHONGQING UNIV OF POSTS & TELECOMM