Method for bidirectional data transfer in narrowband systems

Patent metadata

Field	Value
Publication number	US-11265836-B2
Application number	US-202016815238-A
Country	US
Kind code	B2
Filing date	Mar 11, 2020
Priority date	Sep 27, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A method for bidirectional data transmission, preferably in narrowband systems, between a base station and a terminal device includes providing the terminal device and the base station with frequency reference units and transmitting data between the base station and the terminal device over different frequencies. A basic transmit frequency is defined for transmitting data from terminal device to base station, the terminal device defines a terminal device transmit frequency on the terminal device side for transmitting data from terminal device to base station, a frequency offset Δf offset exists between the basic transmit frequency and the terminal device transmit frequency, the terminal device opens a receive window for data from the base station, and the frequency offset Δf offset is taken into account for opening the window. Base station determines the terminal device transmit frequency and base station transmits data to terminal device based on the determined terminal device transmit frequency.

First claim

The invention claimed is:

1. A method for bidirectional frequency-precise data return transmission in a system or narrowband system between a base station and at least one terminal device, the method comprising the following steps:
providing each of the at least one terminal device and the base station with their own frequency reference unit;
transmitting the data between the base station and the at least one terminal device over different frequencies;
defining a basic transmit frequency for transmitting data from the at least one terminal device to the base station;
using the at least one terminal device to define a terminal device transmit frequency on a terminal device side for transmitting data from the at least one terminal device to the base station, and providing a frequency offset Δf offset between the basic transmit frequency and the terminal device transmit frequency;
using the at least one terminal device to open a receive window to receive data originating from the base station, and taking the frequency offset Δf offset into account for opening the receive window;
using the base station to determine the terminal device transmit frequency;
using the base station to transmit data back to the at least one terminal device with frequency precision based on the determined terminal device transmit frequency; and
wherein the terminal device actively sets the frequency offset Δf offset in order to define the terminal device transmit frequency.

2. A method for bidirectional frequency-precise data return transmission in a system or narrowband system between a base station and at least one terminal device, the method comprising the following steps:
providing each of the at least one terminal device and the base station with their own frequency reference unit;
transmitting the data between the base station and the at least one terminal device over different frequencies;
using the at least one terminal device to open a receive window to receive data originating from the base station, and providing the window with a frequency offset Δf up/down in relation to the terminal device transmit frequency;
using the at least one terminal device to take Δf up/down into account for opening the receive window;
using the base station to determine the terminal device transmit frequency of the data transmitted by the at least one terminal device;
using the base station to transmit data back to the at least one terminal device with frequency precision based on the determined terminal device transmit frequency of the at least one terminal device and incorporating Δf up/down ; and
wherein the frequency offset Δf up/down is a fixed value defined in advance.

3. The method according to claim 2 , which further comprises:
using the at least one terminal device to define a further terminal device transmit frequency on the terminal device side to transmit data from the at least one terminal device to the base station, and providing a further frequency offset Δf′ offset between the basic transmit frequency and the further terminal device transmit frequency;
using the at least one terminal device to take Δf′ offset into account for opening the receive window of the further terminal device transmit frequency; and
using the base station to determine the terminal device transmit frequency of the data transmitted by the at least one terminal device at the further terminal device transmit frequency.

4. A method for bidirectional data transmission in a system or narrowband system between a base station and at least one terminal device, the method comprising the following steps:
providing each of the at least one terminal device and the base station with their own frequency reference unit;
providing each of the at least one terminal device and the base station with at least one radio chip;
connecting the frequency reference units to the radio chips;
transmitting the data between the base station and the at least one terminal device over different frequencies;
using the at least one terminal device to open a receive window to receive data originating from the base station, and taking a frequency offset Δf chip into account for opening the receive window;
the frequency offset Δf chip being dependent on the radio chips in the at least one terminal device; and
wherein the frequency offset Δf chip is at least one of:
determined by measuring frequency-influencing effects of the radio chips; or
emanating from the architecture of the radio chips.

5. The method according to claim 4 , which further comprises fixing and defining the basic transmit frequency in advance.

6. The method according to claim 4 , which further comprises providing the frequency offset Δf up/down as a fixed value defined in advance.

7. The method according to claim 4 , which further comprises making the frequency offset Δf up/down known to the base station and to the at least one terminal device.

8. The method according to claim 4 , which further comprises using the at least one terminal device to define the terminal device transmit frequency for avoiding at least one of interference-affected frequencies or interference-affected frequency ranges.

9. The method according to claim 4 , which further comprises using the at least one terminal device to measure at least one of its own transmit power or an external power and to define the terminal device transmit frequency based on the measuring step.

10. A method for bidirectional data transmission in a system or narrowband system between a base station and at least one terminal device, the method comprising the following steps:
providing each of the at least one terminal device and the base station with their own frequency reference unit;
transmitting the data between the base station and the at least one terminal device over different frequencies;
carrying out the data transmission from the at least one terminal device to the base station at frequencies of an uplink band;
carrying out the data transmission from the base station to a terminal device at frequencies of a downlink band;
using the base station to transmit data to the at least one terminal device based on the determined terminal device transmit frequency and taking a width of the downlink band into account;
using the at least one terminal device to take the width of the downlink band into account for opening the receive window; and
at least one of:
using the base station to transmit data to the at least one terminal device incorporating the frequency offset Δf wrap ; or
using the at least one terminal device to take into account the frequency offset Δf wrap for opening the receive window; or
choosing the frequency offset Δf wrap for locating the resulting transmit frequency of the base station within the downlink band.

11. The method according to claim 10 , which further comprises making the uplink band wider than the downlink band.

12. The method according to claim 10 , which further comprises making the position of the uplink band and the position of the downlink band known to the base station and to the at least one terminal device.

13. The method according to claim 10 , which further comprises providing channels of the bidirectional data transmission in the system or narrowband system with a channel bandwidth range selected from the group consisting of:
from 1 kHz to 25 kHz, or
from 2 kHz to 6 kHz, or
from 3 kHz to 5 kHz.

14. The method according to claim 10 , which further comprises providing channels of the bidirectional data transmission in the system or narrowband system with a symbol rate range selected from the group consisti

Assignees

• Diehl Metering Systems Gmh
• Diehl Metering Systems Gmbh

Inventors

• Petkov Hristo
• Mzyk Raphael
• Kauppert Thomas
• Gottschalk Klaus

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W56/0015

  one node acting as a reference for the others · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H01Q1/2283

  mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title