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Distributed dynamic time slot allocation method in remote TDMA mobile ad hoc network

A mobile self-organization and time slot allocation technology, applied in electrical components, wireless communication and other directions, can solve the problems of not considering the design requirements of smart antennas, the upper limit of the number of dynamically allocated nodes, and the conflict of adjacent time slot advance, etc. The effect of switching frequency of transmit beam direction, reducing node power consumption, and reducing control overhead

Active Publication Date: 2019-09-17
XI AN JIAOTONG UNIV
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Problems solved by technology

For example, the USAP channel utilization rate is usually low, and the upper limit of the number of nodes that can be dynamically allocated is relatively low and relatively fixed. FPRP only supports systems using omnidirectional antenna transmission, which cannot meet the requirements for point-to-point service transmission under directional antennas.
[0003] In addition, most of the current TDMA distributed time slot allocation methods do not consider the design requirements when combined with the application of smart antenna technology. be effectively resolved

Method used

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  • Distributed dynamic time slot allocation method in remote TDMA mobile ad hoc network
  • Distributed dynamic time slot allocation method in remote TDMA mobile ad hoc network
  • Distributed dynamic time slot allocation method in remote TDMA mobile ad hoc network

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] A novel distributed dynamic time slot allocation method in a long-distance TDMA mobile ad hoc network, comprising the following steps:

[0032] (1) Communication frame structure design: the overall design scheme is as follows figure 1 As shown, time-domain resources are divided with superframe as the unit time unit. A superframe is divided into N frames, and each frame is divided into M time slots. The length of a single time slot depends on the sending and receiving performance of the physical layer. Each node In each frame, TDMA is used to access the channel, and each super frame can be divided into two parts as a whole according to different functions.

[0033] First of all, the initial K frame is a monitoring frame, which is mainly used to complete network synchronization, access and monitoring and discovery between differ...

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Abstract

A distributed dynamic time slot allocation method in a remote TDMA mobile ad hoc network comprises the following steps: (1) dividing time resources by taking a superframe as a unit time element, wherein the superframe comprises N frames; (2) each time of time slot distribution taking a local part as a target, and before distribution, request and response nodes determining node states in advance; (3) in order to avoid link interference under spatial multiplexing, a blocking state is further determined; (3) the node sends and receives a time slot distribution request packet by using an intelligent antenna, and node state information is packaged in the packet; and (4) the response node obtains a time slot distribution result by using a time slot distribution algorithm within a specified time, and sends a time slot distribution response packet to each request node to realize time slot distribution; (5) the local time slot allocation table is updated. The distributed dynamic time slot distribution in the TDMA mobile ad hoc network is realized by utilizing the state of the intelligent antenna exchange node, and the method has the advantages of no conflict, space reuse, self-avoidance of interference and the like.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a distributed dynamic time slot allocation method in a long-distance TDMA mobile ad hoc network. Background technique [0002] Wireless transmission for military purposes requires high confidentiality, anti-monitoring, and anti-interference, and some specific application scenarios also require ultra-long transmission distances, and the large delay caused by ultra-long transmission distances makes the use of random contention access Access methods (such as CSMA / CA) are very difficult and complicated. In order to meet the above performance requirements, a TDMA-based mobile ad hoc network and a corresponding distributed time slot allocation method are needed, and in order to realize long-distance transmission with small transmission power, the method needs to be adapted to directional transmission. Today's representative distributed time slot allocation methods inclu...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W72/08H04W74/08
CPCH04W72/0446H04W74/085H04W72/541
Inventor 穆鹏程田宇肖海涛王霞刘思宁李东慧陈建成
Owner XI AN JIAOTONG UNIV
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