Paired carrier multiplexing multiple-user access method

A multi-user access and carrier multiplexing technology, applied in the field of satellite communication, can solve the problem of channel allocation for users who do not support random access of PCMA users

Inactive Publication Date: 2010-08-18
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows for multiple users (PCs) on different satellites to communicate with each other without interfering with one another's own signals or data transmission capabilities.

Problems solved by technology

Technological Problem: The technical problem addressed in this patents relates to enhancing efficient data transfer capabilities while reducing constraints associated with traditional systems like VST radios due to their large size and heavy weight. Current solutions involve adding extra components beyond just one component called an external device, making these techniques difficult to implement within current space limits without compromising performance levels.

Method used

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Embodiment Construction

[0025] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] The user channel allocation technology of paired carrier multiplexing and multi-user random access mainly includes the following parts:

[0027] (1) Composition of multiplexed VSAT network channels with paired carriers;

[0028] (2) User channel application for paired carrier multiplexing VSAT network;

[0029] (3) The closed-loop mode is adopted to realize the time and frequency synchronization of the whole network signal.

[0030] Paired carrier multiplexing multi-user random access technology introduces the PCMA system into the VSAT satellite communication system, and uses short burst PCMA signals to realize the communication between the master and the other party. Compared with the traditional VSAT communication system, the bandwidth utilization rate has increased by nearly 100%. . The VSAT network adopts the combination of TDMA ...

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Abstract

The invention discloses a paired carrier multiplexing multiple-user access method comprising the following steps: arranging a network control carrier, a plurality of user access carriers and a plurality of service carriers in a very small aperture terminal (VSAT) satellite communication network, and allotting channels for a paired carrier multiple access (PCMA) user. The network control carrier comprises a time and frequency reference channel, a system state channel, a service distribution channel and a broadcast channel; each of the user access carriers comprises a user login application channel and a user response channel; each of the service carriers comprises a user communication service channel; each of the service carriers is divided into a plurality of time slots according to the time division multiple address (TDMA) mode; each of the time slots is a service frame; every 32 service frames form 1 super frame; and each of the super frames has a length of 320 ms. Before the channels are allotted for the PCMA user, the PCMA primary party logs in to apply for the channels, the network control center calls the PCMA secondary party, and the network control center allots the frequency and the time slots occupied by the signals of both the PCMA primary party and the PCMA secondary party and the logout indications of both the PCMA primary party and the PCMA secondary party if the PCMA secondary party responds to the network control center.

Description

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Claims

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Application Information

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Owner SHANGHAI NORMAL UNIVERSITY
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