Asynchronous interactive multi-address access method

An access method and interactive technology, applied in the field of asynchronous interactive multiple access, can solve the problems of difficulty in accurate synchronization of multi-hop distributed wireless networks, inability to guarantee the fairness of shared channels, and insufficient maximum channel throughput. , to reduce the packet discard rate, achieve channel resource sharing, and improve channel throughput.

An access method and interactive technology, applied in the field of asynchronous interactive multiple access, can solve the problems of difficulty in accurate synchronization of multi-hop distributed wireless networks, inability to guarantee the fairness of shared channels, and insufficient maximum channel throughput. , to reduce the packet discard rate, achieve channel resource sharing, and improve channel throughput.

CN101018414AInactive Publication Date: 2007-08-15BEIHANG UNIV
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  • Asynchronous interactive multi-address access method
  • Asynchronous interactive multi-address access method
  • Asynchronous interactive multi-address access method

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Embodiment Construction

[0068] The asynchronous interactive multiple access method of the present invention is realized according to the following principles: in the present invention, each central node and each node has only one half-duplex wireless transceiver. All kinds of packets sent by each node can be received by the neighboring nodes and the central node. If the business packets are not sent to the neighboring nodes, then the central node to which they belong needs to be transferred. The nodes belonging to the same central node can be separated by one hop (that is, they can communicate directly, and the two parties are adjacent nodes to each other), or they can be separated by two hops (that is, the intermediate nodes need to transfer the business packets of both parties). In this way, the nodes to which the central node belongs The unscheduled transmission of wireless broadcasts in advance has caused the possibility of hidden terminal and exposed terminal problems.

[0069] The asynchronous ...

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Abstract

The related asynchronous interactive multi-address accessing method comprises: a central node sets the basic access unit number and business group-transmission unit number according to the business condition, and sends the subscribe group for startup; all nodes requiring group- transmission compete in time slot, and the central node counts collision condition and sends the subscribe-start group to distribute the successful access result, and prompts the next time slot; repeating till all basic access units end; the central node sends business groups or polling-control group and prompts the follow-up successful node to transmit business group till all successful node end, and goes into next stage. This invention has large channel throughput, small access time delay, low abandoning rate, and well service quality.

Description

technical field [0001] The present invention relates to a multiple access method, especially a method that has or can be used in various mobile wireless communication networks such as mobile ad hoc networks (or mobile AdHoc networks), wireless sensor networks, wireless access networks, and cellular systems. Under the condition of forming a central control node, an asynchronous interactive multiple access method in which multiple users share wireless channel resources. Background technique [0002] The method of multiple access (that is, Medium Access Control, MAC for short) is to solve the problem of how multiple nodes or users share channel resources quickly, efficiently, fairly and reliably. [0003] In the multiple access method of random access in the prior art, each node usually competes to use the channel after a random delay according to the carrier sense situation. That is, before sending a packet, the node listens to the channel first, and sends the packet if the c...

Claims

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Application Information

Patent Timeline
15 Aug 2007
Publication
CN101018414A
IPC
H04Q7/38; H04L12/56; H04W72/10; H04L12/70; H04W74/08; H04W80/02
Inventors
刘凯; 张军