Adaptive Reservation and Dynamic Time Slot Allocation Method and Device

A technology of dynamic time slot and allocation method, applied in the field of communication, can solve the problems of increasing access delay, reducing channel utilization efficiency, not eliminating long propagation delay, etc.

Active Publication Date: 2017-11-24
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, the above method does not eliminate the long propagation delay t P Influenced by large number of access nodes and small number of reserved time slots, there are serious reservation collisions, and multiple reservation retransmissions are required, which will increase the access delay and reduce the channel utilization efficiency

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  • Adaptive Reservation and Dynamic Time Slot Allocation Method and Device
  • Adaptive Reservation and Dynamic Time Slot Allocation Method and Device
  • Adaptive Reservation and Dynamic Time Slot Allocation Method and Device

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Embodiment Construction

[0079] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0080] The central control node in the present invention can specifically be a satellite in an aerospace information network, a master node in an underwater acoustic network, etc., which can arrange channel resources for users to send data packets, and can receive user data and broadcast data to users at the same time. The uplink is the physical c...

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Abstract

The invention provides a self-adaptation reservation and dynamic time slot distribution method and device. The method includes the steps that after the reservation stage of a current frame is ended, a central control node broadcasts the reservation instruction packet of a next frame to nodes so that each node which receives the reservation instruction packet can send a reservation application packet to the central control node at any one reservation micro time slot within the reservation stage of the next frame according to node probability distribution; when one node sends the reservation application packet on the first reservation micro time slot, the central control node sends a first feedback packet to the node, and when at least two nodes send the reservation application packets on the first reservation micro time slot, the central control node sends a second feedback packet to the two nodes through a down link. In this way, in a long propagation time delay environment, the success rate of node access can be increased, collision and resending of the reservation application packets are reduced, access time delay is shortened, and the channel utilization rate is increased.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for adaptive reservation and dynamic time slot allocation. Background technique [0002] Currently, a multiple access (Medium Access Control, MAC for short) method is used to solve the problem of how multiple nodes or users share channel resources quickly, efficiently, fairly and reliably. In practical applications, space information networks (including aviation communication networks, satellite communication networks, deep space communication networks, etc.) and underwater acoustic networks have long signal propagation delays, collectively referred to as long propagation delay networks. In the design of the traditional MAC method, the user advances the propagation delay (t P ) to eliminate the t P Occupying channel resources and reducing channel utilization during reserved transmission. But in the case of scheduled transmission collision and retrans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10
Inventor 刘凯孔韵雯刘锋张涛徐桢
Owner BEIHANG UNIV
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