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Method for realizing upgraded dynamic source routing (DSR)

A routing protocol and implementation method technology, applied in the direction of error prevention/detection using return channel, digital transmission system, electrical components, etc., can solve problems such as waste of network resources, misjudged links, failures, etc., to reduce misjudgments The number of link failures, reducing routing overhead, and reducing the effect of negative impact

Inactive Publication Date: 2018-05-29
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI +1
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Problems solved by technology

Excessive activation of routing maintenance mechanisms wastes the resources of the entire network; moreover, the original DSR protocol is extremely sensitive to data transmission failures caused by MAC layer conflicts. If the MAC layer conflicts are large, the data cannot be guaranteed after a limited number of retransmission attempts. If the frame is transmitted successfully, it will cause a misjudgment of link failure.

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  • Method for realizing upgraded dynamic source routing (DSR)
  • Method for realizing upgraded dynamic source routing (DSR)

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Embodiment Construction

[0026] The invention provides a method for realizing the DSR improved routing protocol, which is suitable for (quasi) static networks with small network topology changes, and is used for the network layer and link layer of wireless multi-hop networks, and provides network layers with Perceive the state information of the link on the link layer. The present invention takes a typical application scenario of a wireless Mesh network as an example. In a wireless Mesh network, most Mesh routers (Mesh Access Point, MAP, equivalent to AP in WLAN, MAP has routing and local access functions) are static, only a very small number of MAPs are mobile, and mobile The time-varying nature of the network topology is very small, and the wireless Mesh network can be regarded as a characteristic (quasi) static network. In a wireless Mesh network, the possibility of real link failure is very small; in addition, MAPs are usually not powered by batteries, so there is no need to consider energy const...

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Abstract

The invention provides a method for realizing upgraded dynamic source routing (DSR). The method comprises the steps of sensing whether a current link fails when a current data frame is sent unsuccessfully, and if it is sensed that the link does not fails, generating corresponding indication information on a link layer and transmitting the indication information to a network layer; if the network layer receives the indication information, returning link failure times to zero, or, accumulating the link failure times and adding 1; and if it is sensed that the link failure times is not greater than a preset link failure sense tolerance times, continuing to send the data frame through the current link, or, starting a route maintenance mechanism. The method for realizing the upgraded SDR enhances information interaction and sharing between the link layer and the network layer and can find the true cause why the bottom layer link fails, so that the network layer can sense the bottom layer true link state effectively, the network layer determines link failure wrongly for fewer times, the negative effect of route maintenance on network performance is lowered, and the network performance indicator is improved.

Description

technical field [0001] The invention relates to a realization method of a DSR (Dynamic Source Routing, dynamic source routing protocol) improved routing protocol based on cross-layer design. Background technique [0002] Traditional network protocol layers need to be transparent to each other to maintain the independence of each layer protocol design, simplify the difficulty of network protocol development and implementation, and meet the information hiding principle of software design, so it has been widely used. However, in wireless networks, due to the uncertain factors of the wireless environment, resulting in time-varying characteristics of wireless channel capacity and bit error rate, the hierarchical design method cannot guarantee the optimal resource utilization of the network and the QoS requirements of user services. Although various existing new technologies (such as coding technology, modulation and demodulation technology, error control technology and anti-inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/703H04L12/721H04L1/16H04L45/28
CPCH04L1/1607H04L45/14H04L45/28
Inventor 马忠建袁晓兵李宝清
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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