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Cross-layer multicast communication method with high delivery ratio and low time delay

A communication method and delivery rate technology, applied in wireless communication, broadcast service distribution, wireless network protocols, etc., can solve the problems of low protocol delivery rate and large protocol data transmission delay, and achieve the elimination of repeated data transmission and wide coverage. , the effect of reducing data processing time

Inactive Publication Date: 2013-06-05
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently, there are two types of multicast routing protocols in Ad Hoc networks: tree-based multicast routing protocols and grid-based multicast routing protocols. Tree-based multicast routing protocols In the scenario of changes or high-speed movement of nodes, the delivery rate of the protocol is very low; the grid-based multicast routing protocol can provide redundant paths, and can provide high delivery rates in both high-speed and low-speed scenarios of nodes. Repeated sending, the data transmission delay of the protocol is very large

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  • Cross-layer multicast communication method with high delivery ratio and low time delay
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  • Cross-layer multicast communication method with high delivery ratio and low time delay

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Embodiment Construction

[0063] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0064] A cross-layer multicast routing protocol, the information transfer between layers is as follows figure 1 shown. The protocol directly reads the SINR information of the physical layer at the network layer, and calculates the data transmission backoff time and data transmission rate; the backoff time is encapsulated into the data packet header and transmitted to the data link layer, and the data transmission rate is transmitted through the cross-layer interface in the network. The data link layer is directly set; the packet count information used by the data link layer to send data is read from the network layer through the cross-layer interface.

[0065] The implementation of multicast routing is as follows:

[0066] (1) The receiver who joins the multicast group first regards itself as the core node (if multiple receivers join the multicast group...

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Abstract

The invention discloses a cross-layer multicast communication method with high delivery ratio and low time delay, which comprises the following steps that: a local node directly reads information of a physical layer on a network layer, a data link layer shares information of the network layer, and the network layer shares the information of the physical layer, so that multicast communication is realized. When a multicast source is not a network member and data needing sending exists, the data is sent to a father node recorded in a linked list and sent to a multicast network hop by hop; when the multicast source is the network member or the data arrives in the multicast network, the data is flooded in the multicast network; and the network member receives multicast data and then receives and forwards the data. The multicast network is established by the method and backoff time and data sending rate are dynamically calculated in the data transmission process by information sharing amonglayers, so that channel access competition among nodes is reduced, data transmission load in the network is reduced and data transmission with high delivery ratio and low time delay is realized.

Description

technical field [0001] The invention relates to a cross-layer high delivery rate and low delay multicast communication method, belonging to the technical field of wireless communication. Background technique [0002] The wireless Ad Hoc network has the characteristics of no need for fixed facilities, fast and flexible networking, etc. These reasons also lead to problems such as rapid changes in network topology, limited node resources and network bandwidth. Multicast is a point-to-multipoint network connection between the sender and each receiver, which can save network bandwidth, reduce network load, and improve data transmission efficiency. Currently, there are two types of multicast routing protocols in Ad Hoc networks: tree-based multicast routing protocols and grid-based multicast routing protocols. Tree-based multicast routing protocols have small data transmission delays, but frequently In the scenario of changes or high-speed node movement, the protocol delivery rat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W40/02H04W80/06
Inventor 曹叶文吴湘龙
Owner SHANDONG UNIV