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Method for reliably transmitting real-time service in wireless Ad Hoc network

A wireless self-organizing network and real-time service technology, applied in the field of communication, can solve problems such as inability to guarantee real-time service transmission performance

Inactive Publication Date: 2010-11-10
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] In order to overcome the shortcomings that the existing technology cannot guarantee better transmission performance for real-time services, and only considers the relatively special and simple single-hop full-communication network configuration, assuming that all nodes maintain good synchronization, the present invention provides a A method for reliable transmission of real-time services in a wireless ad-hoc network. Reservation of multi-step channel resources is carried out for real-time service data packet transmission. By obtaining channel use rights in advance for real-time services in an Ad Hoc network, its transmission reliability is improved, and packet transmission is reduced. frame error rate in transmission

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  • Method for reliably transmitting real-time service in wireless Ad Hoc network
  • Method for reliably transmitting real-time service in wireless Ad Hoc network
  • Method for reliably transmitting real-time service in wireless Ad Hoc network

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Embodiment Construction

[0050] Two kinds of sending nodes are considered in the Ad Hoc network. The first kind of sending node bears the weight of ordinary data services (such as emails, short message services, etc.), which have lower requirements for real-time performance; the second kind of sending nodes bears the weight of multimedia real-time services (such as video, audio data, etc.), is also our concern about how to ensure its real-time business. order t cycle Represents the generation cycle of real-time service data packets, RPK represents real-time service data packets, DPK represents ordinary service data packets, and RACK represents the special ACK packet for the receiving node of real-time service data packets to confirm the reception of RPK and make m-step channel reservations for its neighbor nodes, t 1 Generate the first real-time business data packet RPK at any time 1 After that, at t 2 = t 1 +t cycle Time will generate the second real-time business data packet RPK 2 , and so on....

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Abstract

The invention discloses a method for reliably transmitting a real-time service in a wireless Ad Hoc network. The method aims at the following circumstances that: a node B receives a real-time service data packet RPK sent by a real-time service sending node A or receives a special ACK packet RACK received by a real-time service receiving node A acknowledgement RPK; a non-real time service node Btx sends DPK to Brx or the real-time service node A sends a first RPK to the A; and the real-time service sending node sends a second real-time service data packet, subsequent real-time service data packets and the like. By acquiring channel permission for the real-time service in the Ad Hoc network in advance, the transmission reliability is improved and the frame error rate in packet transmission is reduced.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for transmitting real-time services (such as video and audio data) based on multi-step channel reservation in a wireless ad hoc network. Background technique [0002] Wireless self-organizing network (namely Ad Hoc network) is a multi-hop wireless network composed of mobile terminals with wireless transceivers. The establishment of an Ad Hoc network does not require pre-laying network infrastructure, nor does it need to set up any central control nodes. It relies on the mutual cooperation between nodes to form a network by itself in a mobile and complex wireless environment. It is characterized by strong networking flexibility and easy access. It can be widely used in military battlefields, civilian communications, vehicle-mounted networks and other occasions due to its rapid deployment, strong overall system invulnerability, and low cost. [0003] With the contin...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04W84/18
Inventor 李波陈轶
Owner NORTHWESTERN POLYTECHNICAL UNIV
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