Method for link available bandwidth estimation suitable for ad hoc network concurrence access
A bandwidth estimation and link technology, which is applied in the field of wireless networks, can solve problems such as a method for estimating link available bandwidth that has not been concurrently connected to an adhoc network
Active Publication Date: 2014-02-05
武汉华讯国蓉科技有限公司
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However, no methods for estimating link available bandwidth for concurrent access ad hoc networks have been proposed so far
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[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0024] In this specification, the link available bandwidth estimation method suitable for concurrent access to ad hoc networks proposed by the present invention is abbreviated as ABEM (Available Bandwidth Estimate Method). ABEM first set the following network operating conditions:
[0025] 1. Each node is equipped with a single half-duplex wireless transceiver, that is, at the same time, the node can only send or receive signals, but cannot send and receive at the same time;
[0026] 2. Each node has the same antenna height and antenna gain, and the signal transmission power is consistent;
[0027] 3. The node adopts the direct sequence spread spectrum (DSSS) physical layer, the MAC layer uses the concurrent access mechanism based on the control gap, the network layer uses the IP protocol, and the transport layer uses the UDP protocol.
[00...
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The invention discloses a method for link available bandwidth estimation suitable for ad hoc network concurrent access. The method comprises the steps that firstly, the maximum throughput of a link is determined according to a concurrence access mechanism protocol based on control gaps; secondly, occupation information of surrounding links is recorded by nodes through monitoring and the available sending duration and the available receiving duration of the nodes are estimated; thirdly, on the basis, the occupation information of the surrounding links are periodically interacted by each node and the neighbor nodes, so that the probability that the link sending node and the link receiving node occupy a channel at the same time is determined and the available bandwidth of the links is preliminarily estimated; finally, the probability of transmission failure caused by the fact that a new service is added to the receiving node is forecasted, the preliminarily-estimated value of the available bandwidth of the links is corrected based on the probability of transmission failure, and therefore the final available bandwidth of the links is obtained. A simulation experiment in the QualNet simulation environment proves the validity of the method.
Description
technical field [0001] The invention belongs to the field of wireless networks, in particular to a method for estimating link available bandwidth suitable for concurrent access to ad hoc networks. Background technique [0002] Ad hoc network is a new type of wireless network. It consists of a series of network nodes with completely equal status, without any fixed or preset network facilities. Each node in the network is both a terminal and a router. Under the control of the channel access control (Medium Access Control, MAC) protocol, they access the wireless channel in a multi-hop sharing manner to realize the sharing of information and services. Due to the characteristics of fast and flexible networking and high reliability, ad hoc networks are widely used in occasions where fixed communication infrastructure cannot be provided, such as field communications, emergency rescue and disaster relief, field expeditions, and temporary meetings. [0003] IEEE802.11DCF (Distribut...
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Login to View More IPC IPC(8): H04W28/20H04W72/04H04W80/00H04W84/18H04L1/00H04L1/18
Inventor 雷磊罗诚张婷王成华张雅静朱马君王丹
Owner 武汉华讯国蓉科技有限公司