Unlock instant, AI-driven research and patent intelligence for your innovation.

An improved method for optimal selection of candidate time slots in ais systems

A technology for optimal selection and time slot selection, applied in the field of information processing, can solve the problems of wasting scanning selection time, waste of candidate time slots, etc., and achieve the effect of improving the efficiency of time slot selection and saving processing resources

Active Publication Date: 2016-01-20
DALIAN MARITIME UNIVERSITY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using the above algorithm to select the initial candidate time slots, the number of consecutive candidate time slots is designed to be gradually scanned from ≥ 4 until the required candidate time slots are obtained; this not only wastes a lot of time for scanning and selection, but also the selected candidate time slots may Wasteful, since most AIS messages are single-slot messages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An improved method for optimal selection of candidate time slots in ais systems
  • An improved method for optimal selection of candidate time slots in ais systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] (1) Normalized TDMA slot SI selection result

[0035] enter:

[0036] =RATDMA_MODE, =RATDMA_STRUCT, =1;

[0037] output:

[0038] SI_STRUCT={225,150}.

[0039] (2) Optimal selection results of candidate slots

[0040] enter:

[0041] =RATDMA_MODE, =RATDMA_STRUCT, =1;

[0042] output:

[0043] SS_STRUCT={SS_FLAG,SS_START,SS_LENGTH}={1,1125,1};

[0044] Explanation: SS_FLAG: 0: select from the candidate time slot, 1, continue to reserve the current time slot, 2, no longer reserve; SS_START: start time slot of the candidate time slot, SS_LENGTH: length of the candidate time slot.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of information processing. It is realized by AIS protocol stack terminal equipment, which is composed of AIS protocol stack core processor, external AIS time slot selection parameter input interface module and AIS radio frequency transceiver module, and the power supply module provides power for AIS protocol stack terminal equipment. Wherein, the external AIS time slot selection parameter input interface module receives parameter data of various message packages and message lengths to determine and influence time slot selection parameters. The core processor of the AIS protocol stack is the key of the present invention, which executes the improved time slot selection model and algorithm designed by the present invention, and performs AIS message encapsulation. The AIS radio frequency mode transceiver module is responsible for establishing the AIS VDL (VHF Data Link—VHF? Data? Link) link to exchange information with other AIS terminal equipment.

Description

technical field [0001] The invention relates to a method for optimally selecting a candidate time slot of an AIS system, in particular to an improved method for optimally selecting a candidate time slot for an AIS system; it belongs to the technical field of information processing. Background technique [0002] In the international AIS (ship automatic identification system - Automatic Identification System) technical standard, it is stipulated that the AIS channel is divided into 2250 channels per minute on the 87B (161.975MHz) and 88B (162.025MHz) dedicated maritime VHF (Very High Frequency) channels. Time slots, using the TDMA (Time Division Multiple Access - TimeDivisionMultipleAccess) communication system to exchange and identify digital information between ships to achieve the purpose of collision avoidance. In order to enable all kinds of terminal equipment to independently form a network on the above channels to realize the mutual exchange of information, the internat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/16
Inventor 胡青胡伟张淑芳张晶泊
Owner DALIAN MARITIME UNIVERSITY