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Beam switching method based on variable-length time slot

A technology of beam switching and time slots, which is applied in the field of communication systems, can solve the problems of low utilization rate of TDMA resources and multi-slot protection time, and achieve the effect of less protection time and improved utilization efficiency

Active Publication Date: 2018-06-15
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the more time slot guard time of TDMA, the resource utilization rate of TDMA is low

Method used

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  • Beam switching method based on variable-length time slot
  • Beam switching method based on variable-length time slot
  • Beam switching method based on variable-length time slot

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Experimental program
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Embodiment Construction

[0023] Such as image 3 As shown, the satellite communication system applied by this method is composed of network control / control console, ground terminal, mobile terminal and communication satellite. The network control / console is responsible for the allocation of satellite resources, and the control commands of the network control / console communicate with the mobile terminal through the ground terminal. The schematic diagram of the protocol flow is as follows: Figure 4 As shown, the specific implementation steps are as follows:

[0024] (1) Network control or control station sends carrier information and time slot plan to mobile terminal and ground terminal; Described carrier information includes center frequency point, carrier rate, initial modulation and coding mode; The content of described time slot plan is A list, the content of each item is the start time of the time slot, the carrier used, the type of the time slot, the length of the time slot, the modulation and ...

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Abstract

The invention discloses a beam switching method based on a variable-length time slot, and the method is adaptive to a communication system in which a mobile terminal performs switching between beams,and solves a problem that a frequency-division multiple access system loses data while performing beam cross-region switching and resource utilization rate of a conventional time-division system is not high. In the method provided by the invention, the mobile terminal still monopolizes carriers. When crossing regions is not needed, the terminal only uses continuous data time slots only taking second as a unit. When crossing regions is needed, time slot length of the data time slots is determined according to duration, least detection times constraint and minimum service transmission rate of the mobile terminal in an available ben overlapped region, and a service detection time slot used for detection at a target beam is allocated. When crossing regions is completed, the detection time slotis canceled, and a mode only using the data time slot is recovered. In the method provided by the scheme of the invention, cross-region seamless switching of the mobile terminal is realized with little time slot protection cost.

Description

technical field [0001] The invention relates to the technical field of communication, and relates to a communication system suitable for switching between beams by a mobile terminal. Background technique [0002] In the field of satellite communications, spot beam coverage is usually used to improve spectrum resource utilization. Each spot beam constitutes a cell, and the coverage is usually only a few hundred kilometers. It is necessary to technically support the mobile terminal to traverse the coverage of different beams. Usually, fixed frequency band resources are used in each beam, and frequency band resources of adjacent beams are different. [0003] The power value at the center of the beam is the largest, and gradually decreases towards the edge of the beam. When the mobile terminal moves from the center of beam A to the adjacent beam B, the signal strength between the mobile terminal and beam A gradually decreases, while the signal strength between the mobile termi...

Claims

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Application Information

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IPC IPC(8): H04W36/32H04W72/04H04W72/08
CPCH04W36/32H04W72/0446H04W72/0453H04W72/046H04W72/542
Inventor 将洪磊陈杰徐学梅王立忠张鹏宗岳田黄宪超
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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