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A method and device for real-time division and selection of random time slots with multi-channel variable time windows

A multi-channel, time-slot technology, applied in digital transmission systems, data exchange networks, and error prevention, etc., can solve the problems of inability to transmit messages, low system real-time processing, and insufficient real-time processing.

Active Publication Date: 2018-09-18
四川九洲空管科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. The real-time processing of the system is not high, and the real-time processing is not enough, which will lead to the arrival of the message that needs to be transmitted, but the time slot has not been generated or has not arrived, resulting in the problem that the message cannot be transmitted after waiting for a long time, thus reducing the system's performance. real-time

Method used

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  • A method and device for real-time division and selection of random time slots with multi-channel variable time windows
  • A method and device for real-time division and selection of random time slots with multi-channel variable time windows
  • A method and device for real-time division and selection of random time slots with multi-channel variable time windows

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Embodiment 1

[0065] Step 1: Delineate the transmission time period of FIS-B message and TIS-B message according to the second pulse; figure 1 The present invention provides a method for real-time division and selection of random time slots with multi-channel variable time windows and a schematic diagram of time segment division in Step 101 of Embodiment 1, as shown in figure 1 As shown, the time period is divided as follows: The specific method is: starting from the second pulse, set the initial T keep_start is the starting guard time for message transmission, and then T FIS It is the time period for FIS-B message transmission, and a maximum of 8 FIS-B messages can be transmitted within this time period, and then T keep_end It is the protection time for message transmission termination, and then set T keep_start is the initial protection time for message transmission, then TTIS is the time period for TIS-B message transmission, and a maximum of 190 TIS-B messages can be transmitted withi...

Embodiment 2

[0070] Embodiment two: figure 2 for figure 1 The schematic flow chart of delineating a specific FIS-B message transmission channel according to the configuration initial value obtained in step 2 of the illustrated embodiment includes:

[0071] Step 1031, divide the FIS-B time period into 32 channels FIS_gateway1~FIS_gateway32 that can transmit messages, that is, T FIS The FIS-B message transmission time period is expressed in terms of ΔT FIS For stepping, it is divided into 32 channels that can transmit messages;

[0072]Step 1032, obtain the configuration initial value of the FIS-B message transmission channel FIS_set_gateway1~FIS_set_gateway8 and the channel enable signal from the CPU communication interface, and configure 8 transmission channels at most, that is, obtain FIS_set_gateway1, FIS_set_gateway2...FIS_set_gateway8, and the enable signal is high and effective;

[0073] Step 1033, correspond to the FIS_set_gateway configured and the specific channels in the divid...

Embodiment 3

[0075] Embodiment three: image 3 for figure 1 The schematic flow chart of delineating a specific TIS-B message transmission time window according to the obtained configuration initial value in step 3 of the illustrated embodiment includes the following steps:

[0076] Step 1035, divide the TIS-B time period into 5 time windows T1 in which messages can be transmitted Start ~T1 end , T2 Start ~T2 end , T3 Start ~T3 end , T4 Start ~T4 end and T5 Start ~T5 end . That is, in the TIS-B time period, the fixed time T1, T2, T3, T4 and T5 are taken as the time starting point, and the ΔT TIS_window For the width, five fixed time windows are defined;

[0077] Step 1036, obtain the configuration offset and the time window enabling signal of the TIS-B message transmission time window from the CPU communication interface, if the time window enabling signal is valid (equal to 1), go to step 1037, if invalid (equal to 0 ), it will not be configured;

[0078] Step 1037, slide the...

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Abstract

The invention belongs to the field of message processing, in particular to a method and device for real-time division and selection of random time slots. Aiming at the problems existing in the prior art, the present invention provides a method and device for real-time division and selection of random time slots, which transmit message types and quantities according to needs, and combine second pulses to establish transmission time channels and transmission time slots for different types of messages , improving the working efficiency of the system. The present invention first defines the FIS-B message and the TIS-B message transmission time period according to the second pulse, and then obtains the configuration initial value of the FIS-B message transmission channel according to the CPU communication interface, and defines the specific FIS-B message Transmit channel; obtain the configuration initial value of the TIS-B message transmission time window offset according to the CPU communication interface, set the TIS-B message transmission time window, and further divide the TIS-B message transmission time slot; finally, according to the second pulse Update the message transmission channel and time slot.

Description

technical field [0001] The invention belongs to the field of ADS broadcast message processing, in particular to a method and device for real-time division and selection of random time slots with multi-channel variable time windows. Background technique [0002] In order to enable the aircraft on the route to fly safely, effectively and in a planned manner in the airspace, it is necessary to monitor the flight dynamics of the aircraft in the airspace in real time. The radar surveillance methods in the prior art use the inquiry and response method to detect the target, and the straight-line propagation of the radar beam forms a large number of radar blind spots, which cannot cover areas such as oceans and deserts; the radar rotation period limits the improvement of the data update rate, thereby limiting Improvement of monitoring accuracy; In addition, radar monitoring cannot obtain situational data such as the planned route and speed of the aircraft, which limits the improveme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L12/823H04L1/00H04L47/32
Inventor 张炼冯涛刘元春
Owner 四川九洲空管科技有限责任公司
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