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WIFI-based TDMA backhaul transmission method

A technology of backhaul transmission and backhaul network, applied in the field of wireless WIFI network backhaul transmission, can solve the problems of increasing the probability of collision and reducing the efficiency of data transmission, so as to reduce the conflict and improve the efficiency of data transmission.

Inactive Publication Date: 2016-08-24
SHANGHAI DIANJI UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] However, Wifi technology is based on the 802.11 protocol, and CSMA / CA technology is used in the access control layer. When the number of nodes is large, the probability of network collision increases, which greatly reduces the efficiency of data transmission.

Method used

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  • WIFI-based TDMA backhaul transmission method
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Embodiment Construction

[0020] The specific embodiments of the present invention are given below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in very simplified form and use imprecise ratios, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention.

[0021] MPCP (Multi-Point Control Protocol) is a function of the MAC control sublayer. MPCP uses messages, state machines, and timers to control access to the P2MP (point-to-multipoint) topology. Each ONU in the P2MP topology includes an MPCP entity for communicating with an MPCP entity in the OLT. As the basis of EPON / MPCP, EPON implements a P2P emulation sublayer, which makes the P2MP network topology a collection of multiple point-to-point links for high-l...

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Abstract

The invention provides a WIFI-based TDMA backhaul transmission method. The method comprises the following steps: a central node operates an MPCP, and access control is carried out on a to-be-accessed backhaul transmission node; time synchronization is carried out on each backhaul transmission node accessed to a backhaul transmission network, a ranging algorithm synchronizes the distance and time information between backhaul transmission nodes, and corresponding time slices are distributed; after the corresponding time slices are distributed, each backhaul transmission node transmits data in each specified time slice, and each backhaul transmission node can receive data at any time. According to the WIFI-based TDMA backhaul transmission method, an MAC layer based on a 802.11 protocol is changed, a CSMA / CA technology is not used any more and is changed into a multi-point control protocol (MPCP) based on time slice rotation, the MPCP is operated between the central node and the backhaul transmission node, the MPCP of the central node is in charge of arbitrating and distributing data transmission of multiple backhaul transmission nodes, collisionless distribution of channel resources is ensured, and the backhaul transmission data efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of wireless WIFI network backhaul transmission, and in particular to a WIFI-based TDMA backhaul transmission method. Background technique [0002] Mobile communication is one of the most active branches in the field of communication, and it is also the fastest-growing communication technology. With the development and maturity of mobile communications, telecom tariffs are getting lower and lower, and operators are becoming more and more sensitive to the cost of supporting facilities such as base station equipment and transmission. As the cost of base station equipment continues to decrease, the cost of the transmission link between the base station and the base station controller accounts for an increasing proportion. [0003] At present, regarding the transmission between the base station and the base station controller, this kind of data transmission is customarily called backhaul (backhaul) in the indust...

Claims

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Application Information

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IPC IPC(8): H04W74/06
CPCH04W74/06
Inventor 朱一群汪超
Owner SHANGHAI DIANJI UNIV
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