SU1290546A1 - System for linear duplex radio communication with mobile objects - Google Patents

Abstract

This invention relates to radio. The purpose of the invention is to increase the duration of a communication session in the conditions of movement from one zone to another. The system contains line-grouped radio stations 1-6 with different frequency channels, distribution station 7, linear paths 8 and 9, and mobile radio station 10 consisting of receiver I1, transmitter 12, communication quality analyzer 13, antenna 14, and mA 16, ELID 17, grs 18 control signals and automatic channel switching unit (BAPK) 15, consisting of switching blocks 19 and 20 with long and short switching cycles, during the movement of radio station 10 along radio stations 1 -6 and the presence (absence) of the conversation subscribers, switching frequency is performed in accordance with a long (short) cycle switching. The time interval during which subscribers can conduct a radio communication session depends on which radio station 1-6 establishes the connection. The goal is achieved by the introduction of El-16 and 16-H and El-18, as well as the implementation of BAPK 15. 1 Il. w (L S yu, / i / LM Xi SP m

Description

The invention relates to a radio communication technique and can be used in the construction of information exchange systems with mobile objects on highways or railways.

The purpose of the invention is to increase the duration of a communication session in conditions of movement from one zone to another.

The drawing shows the structural schemes of the proposed system.

The linear duplex radio communication system with mobile objects contains linear fixed stations 1-6 divided into groups with different frequency channels, distribution station 7, linear paths 8 and 9, mobile radio station 10 consisting of receiver 11, transmitter 12, quality analyzer 13 , antenna 14, the automatic switching unit 15, the AND element 16, the NAND element 17, the control signal generator 18, the switching unit 19 with the long switching cycle, and the switching unit 20 with the short switching cycle.

The system works as follows.

When the mobile radio station 10 moves along stationary radio stations 1-6 and there is no negotiation, the frequencies are switched according to a short cycle. This is ensured by the absence of a control signal from the output of the command generator 18, appearing at the output of the analyzer 13 at the moment of transition from the sphere of activity of one subscriber to the sphere of another, passes only through the element AND NOT 17 and causes block 20. When moving, when a radio session is being conducted, the frequency switching takes place in accordance with a long cycle, since signals from generator 18 pass through AND 16 and connect block 19. The time interval during which subscribers can dit radio session depends on through which the stationary stations 1 - 6 is set to compound (If the connection between mobile

VNIIPI Order 7917/58

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By means of operation of block 15 and block 19, the pass-through channel can be maintained until the object leaves the field of the last subscriber and a maximum possible time equal to 3 t / V can be provided for negotiation, where t is the distance between two adjacent stationary radio stations 3,4 and 6; V is the speed of movement of the mobile radio station 10.

Claims (1)

Invention Formula A linear duplex radio communication system with mobile objects, comprising linear fixed stations with different frequency channels divided into groups, each group of stationary radio stations connected to a distribution station by a linear channel, as well as a mobile station consisting of an antenna connected to the receiver input and output transmitter, the receiver output is connected to the input of the communication quality analyzer and an automatic channel switching unit whose output is connected to the input To control the transmitter and receiver, in order to increase the duration of a communication session in the conditions of movement from one zone to another, linear fixed stations are installed on the border of two adjacent groups, low-frequency outputs of which are connected to linear paths of different groups, and on the mobile radio station, a control signal generator and an AND element and an NAND element, combined at the input, are entered, the outputs of which are connected to the inputs of an automatic channel switching block consisting of and switching from the short cycle and the switching unit kommutahschi long switching cycle, which combined outputs. and the inputs are the inputs of the automatic channel switching unit, while the output of the control signal generator is connected to the second inputs of the AND element and the NAND element, Circulation 658 Subscription