Access control method for differentiated service coexistence scenario in wireless medical network
An access control and differentiated technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve the problem of increasing the difficulty of designing the access control mechanism of the MAC layer, reduce the packet drop rate, increase the Channel utilization efficiency, the effect of improving channel utilization
Active Publication Date: 2019-08-23
XI AN JIAOTONG UNIV
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Problems solved by technology
This makes it difficult for traditional wireless communication technologies to be directly applied to this scenario
2) The diversification of business types in the wireless medical network further increases the difficulty of the design of the MAC layer access control mechanism
This makes the traditional solution for a single business model no longer applicable to the current scenario
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[0041] The present invention is described in further detail below in conjunction with accompanying drawing:
[0042] The system model adopted by the present invention is as figure 1 shown. In the present invention, a wireless medical network applied to a large medical facility is considered. The network adopts a star topology, consisting of a central base station and N d These devices include medical sensors, measurement sensors, wearable devices and so on. in this N dAmong the wireless medical network terminal equipment, there are N ps terminal devices provide short-cycle access services; N pl terminal equipment to provide long-term access services; N r A terminal device provides random access service.
[0043] for N ps They are mainly used to provide health sign monitoring services for inpatients who need intensive monitoring, including blood sugar level monitoring, blood pressure level detection, blood oxygen concentration detection, etc. It is stipulated that the ...
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The invention discloses an access control method oriented to a differentiated service coexistence scene in a wireless medical treatment network. The wireless medical treatment network is of a star topology structure and consists of a central base station and Nd terminal devices for providing different types of services. The access control method comprises the implementation steps that 1, all the terminal devices are divided into three categories according to different service types provided by the terminal devices in the network; 2, total channel resources are divided according to the proportion of three categories of the terminal devices for access of different types of terminal devices, wherein the terminal devices providing periodic access services are accessed by adopting a 'TDMA + FDMA' based scheme, transmission channels and the transmission time slots are allocated by base stations in a unified mode, and the terminal devices providing random access services are accessed by adopting an ACB mechanism; 3, when a jam occurs in a random access group, jam recovery is accelerated by dynamically adjusting the channel allocation ratio of follow-up time slots. Simulation results show that the method can provide higher channel utilization ratio and extremely low packet dropping rate under the large-scale access conditions.
Description
[0001] Technical field: [0002] The invention belongs to the technical field of M2M communication, and in particular relates to an access control method for differentiating service coexistence scenarios in a wireless medical network. [0003] Background technique: [0004] In recent years, the field of smart mobile devices has achieved rapid development, and a large number of low-cost mobile devices with both physical sign detection and wireless communication functions have emerged, which has greatly promoted the vigorous development of mobile medical and electronic medical and other related fields. In large medical facilities, a large number of people carrying smart mobile devices and widely distributed sensor devices in medical facilities will generate massive business data that needs to be transmitted wirelessly. At the same time, large medical sites often have the following characteristics: a large number of coexisting wireless transmission links, harsh multipath propagati...
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IPC IPC(8): H04W28/02H04W74/02
CPCH04W28/0289H04W74/02
Inventor 杜清河赵卫东任品毅孙黎王熠晨
Owner XI AN JIAOTONG UNIV