Method for the locationally selective transmission of a signal by radio, method for the locationally selective reception of a signal by radio, and transmitter/receiver unit for carrying out such a method

Patent metadata

Field	Value
Publication number	US-11044029-B2
Application number	US-201816641891-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Aug 29, 2017
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A method is described for the locationally selective transmission of a signal by radio. Both a transmitter and a receiver are synchronized to the same time reference. The receiver receiving and demodulating, at a time that is one of the specified times of the time reference, a signal transmitted by the transmitter, if the receiver has received the signal at a time that is one of the specified times. The method includes the transmitter determining a receive location within a receive zone to which it wishes to transmit the signal in selective fashion, a position in the receive zone being a function of a position of the transmitter and a signal runtime. The method also includes the transmitter transmitting the signal; and the receiver, which is situated inside the receive zone, receives and demodulates the signal.

First claim

What is claimed is:

1. A method for a locationally selective transmission of a signal by radio, both a transmitter and a receiver being synchronized to the same time reference, and the receiver receiving and demodulating, at a time that is one of the specified times of the time reference, a signal transmitted by the transmitter, if the receiver has received the signal at a time that is one of the specified times, the method comprising the following steps:
determining, by the transmitter, a receive location within a receive zone to which the transmitter is to selectively transmit the signal, a position in the receive zone being a function of a position of the transmitter and a signal runtime, wherein the receive zone is annular;
transmitting, by the transmitter, the signal, wherein the receiver situated in the receive zone receives and demodulates the signal; and
modifying a width of the receive zone by the transmitter through a selection of a signal structure.

2. The method as recited in claim 1 , wherein a width of the receive zone is enlarged through an additional synchronization at the receiver.

3. The method as recited in claim 1 , wherein the signal is transmitted by the transmitter in such a way that only one receiver, which is situated within the receive zone, can correctly demodulate the signal.

4. The method as recited in claim 1 , wherein the transmitter uses a CAZAC function or a CAZAC sequence for the modulation of the radio signal and the receiver uses a corresponding demodulation.

5. The method as recited in claim 1 , wherein the transmission and reception take place on a level of a physical layer.

6. The method as recited in claim 1 , wherein the transmitter and the receiver are synchronized to the same time reference by the Global Positioning System.

7. The method as recited in claim 1 , wherein the locationally selective transmission and/or reception is used in a geocasting system.

8. The method as recited in claim 1 , wherein the width of the receive zone is modified by selecting a length of a cyclic prefix of the signal structure.

9. A transmitter that is set up to transmit a signal in locationally selective fashion, the transmitter configured to:
determine a receive location within a receive zone to which the transmitter is to selectively transmit the signal, a position in the receive zone being a function of a position of the transmitter and a signal runtime, wherein the receive zone is annular;
transmit the signal; and
modify a width of the receive zone by the transmitter through a selection of a signal structure.

10. A non-transitory computer-readable storage medium on which is stored a computer program for a locationally selective transmission of a signal by radio, the computer program, when executed by a computer, causing the computer to perform the following steps:
determining a receive location within a receive zone to which the transmitter is to selectively transmit the signal, a position in the receive zone being a function of a position of the transmitter and a signal runtime, wherein the receive zone is annular;
transmitting the signal wherein the receiver situated in the receive zone receives and demodulates the signal; and
modifying a width of the receive zone by the transmitter through a selection of a signal structure.

11. An electronic controller that is set up to transmit a signal in locationally selective fashion, the electronic controller configured to:
determine a receive location within a receive zone to which the transmitter is to selectively transmit the signal, a position in the receive zone being a function of a position of the transmitter and a signal runtime, wherein the receive zone is annular;
transmit the signal; and
modify a width of the receive zone by the transmitter through a selection of a signal structure.

Assignees

• Bosch Gmbh Robert

Inventors

• Thein Christoph
• Sambale Klaus
• Hofmann Frank

Classifications

• H04H60/15 Primary

  on receiving information · CPC title

• H04W4/029

  Location-based management or tracking services · CPC title

• H04H20/53

  Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers · CPC title

• H04H60/42 Primary

  for identifying broadcast areas · CPC title

• H04H40/09

  Arrangements for receiving desired information automatically according to timetables · CPC title