Ad Hoc network MAC (Media Access Control) protocol realizing method based on STDMA (Self Organizing Time Division Multiple Access)

A protocol implementation, space-time multiple access technology, applied in electrical components, wireless communication, etc., can solve problems such as poor adaptability, achieve good support, high time slot utilization, and low overhead.

Inactive Publication Date: 2012-07-25
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] In order to overcome the deficiency of poor adaptability of the existing Ad Hoc network MAC protocol implementation metho

Method used

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  • Ad Hoc network MAC (Media Access Control) protocol realizing method based on STDMA (Self Organizing Time Division Multiple Access)
  • Ad Hoc network MAC (Media Access Control) protocol realizing method based on STDMA (Self Organizing Time Division Multiple Access)
  • Ad Hoc network MAC (Media Access Control) protocol realizing method based on STDMA (Self Organizing Time Division Multiple Access)

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Embodiment Construction

[0024] refer to Figure 1~6 . The specific implementation steps of a method for realizing the MAC protocol of an Ad Hoc network based on space-time multiple access in the present invention are as follows.

[0025] Since the STDMA multiple access protocol described in the present invention needs to deal with the dynamic topology Ad Hoc network, it is first necessary to realize the dynamic network access of nodes. Node access to the network is realized by means of neighbor agent.

[0026] The STDMA multi-access protocol of the present invention adopts the way of neighbor agent to realize dynamic network access of nodes.

[0027] 1) In the STDMA multiple access protocol of the present invention, there is a one-to-one correspondence between nodes and time slots in the control frame. When a node needs to join the Ad Hoc network, it first monitors the wireless channel to determine the frame format. If the new node detects that there is no information exchange in the network for ...

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Abstract

The invention discloses an Ad Hoc network MAC (Media Access Control) protocol realizing method based on STDMA (Self Organizing Time Division Multiple Access), solving the problem that a current Ad Hoc network MAC protocol realizing method has poor applicability. The technical scheme of the invention is as follows: a complete data link layer protocol frame is divided into three parts, namely a control frame, a broadcast frame and an information frame, wherein the control frame is in one-to-one correspondence to nodes and is used for applying an information timeslot when transmitting data. The broadcast frame is used for processing application conflict. The information frame is used for distributing the number of reference timeslots according to an exponential form of one 2n, two 2n-1, four 2n-2, etc., and distributing a timeslot number to be suitable for businesses with different QoS (Quality of System) requirements. The timeslots are organized in a massive manner so as to meet the QoS requirements of different businesses. According to the Ad Hoc network MAC protocol realizing method based on the STDMA, the topology suitability of the Ad Hoc network is improved, the characteristics of low expense and high time slot utilization rate are realized, and great support can be provided for sound and video communication.

Description

technical field [0001] The invention relates to a method for realizing a MAC protocol based on space-time multiple access (hereinafter referred to as STDMA), in particular to a method for realizing an Ad Hoc network MAC protocol based on STDMA. Background technique [0002] The Ad Hoc network has the characteristics of not depending on the communication infrastructure, easy to implement, and can form any topology. Therefore, it has broad application prospects in the fields of military, emergency rescue, disaster relief and emergency communication. Since the Ad Hoc network is a distributed non-central network, it is impossible to determine a central coordination point, so the current Ad Hoc network mainly uses the 802.11x series or 802.15.4 based on CSMA / CA as the MAC layer protocol. However, CSMA / CA is a contention-based multiple access technology. When the number of nodes is large or the traffic is large, especially in the case of real-time voice and video services, QoS can...

Claims

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Application Information

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IPC IPC(8): H04W72/08H04W74/08
Inventor 陈旿樊立明慕德俊洪亮李静华周文佳薛霜肖迪
Owner NORTHWESTERN POLYTECHNICAL UNIV
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