Method and Device for Selecting Transmission Channels in a Network Radio Connection

Patent metadata

Field	Value
Publication number	US-2016014793-A1
Application number	US-201514865560-A
Country	US
Kind code	A1
Filing date	Sep 25, 2015
Priority date	Mar 26, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

Transmission channels are selected in a multiantenna network radio connection in which data are transmitted using radio signals between a radio base station and a mobile terminal. The mobile terminal has at least one decoder, by means of which radio signals received by at least one of the terminal antennas can be decoded in order to obtain the data. By means of the transmission channel selection, it is decided which transmission path and/or which communication technology is to be used for the transmission of the data between the radio base station and the mobile terminal.

First claim

What is claimed is:

1 . A method for transmission channel selection in a multiantenna network radio link that is used for data transmission using radio signals between a radio base station and a mobile terminal, wherein
the radio base station and the mobile terminal each have at least two antennas that form a plurality of transmission paths for the multiantenna network radio link and at least two transmission channels for the data transmission, which each use one or more of the transmission paths in accordance with a channel matrix, and the mobile terminal has at least one decoder that can be used to decode radio signals received from at least one of the terminal antennas to obtain the data, wherein the method comprises the following acts:
using a transmission channel selection to decide at least one of the instances of the transmission paths and the communication system technology used to transmit the data between radio base station and mobile terminal,
using, by the mobile radio base station, the transmission paths to transmit mobile radio signals for first data to the mobile terminal using at least one communication system technology;
supplying the mobile radio signals to the decoder on a transmission-channel-by-transmission-channel basis;
decoding, by the decoder, the mobile radio signals to obtain the first data on a transmission-channel-by-transmission-channel basis;
using the decoded first data on a transmission-channel-by-transmission-channel basis to form at least one quality value that is representative of a quality of the data transmission via the respective transmission channel; and
using a comparison of the quality values of the transmission channels to perform the transmission channel selection for the subsequent transmission of second data that form useful data.

2 . The method as claimed in claim 1 , wherein said transmission channel selection comprises an estimation of coefficients of the channel matrix on the basis of the decoded first data.

3 . The method as claimed in claim 1 , wherein at least one antenna of the radio base station and one antenna of the mobile terminal are configured to transmit data on the basis of at least two different communication system technologies.

4 . The method as claimed in claim 1 , wherein a determination of the quality value comprises at least one of a data transmission rate, a condition number of a transmission channel ascertained based on the channel matrix, and a spectral efficiency of a respective transmission channel being captured and used.

5 . The method as claimed in claim 1 , wherein a determination of the quality value comprises integration being performed over a prescribed reception bandwidth and over at least one portion of a preamble of a transmission protocol that is used for the radio link.

6 . The method as claimed in claim 1 , wherein a channel matrix is formed for a plurality of available transmission paths.

7 . The method as claimed in claim 1 , wherein the network radio link is one of a mobile radio link and a WLAN connection.

8 . The method as claimed in claim 1 , wherein the radio base station is a static station and the mobile terminal is permanently connected to a motor vehicle.

9 . The method as claimed in claim 8 , wherein the motor vehicle has a bodywork and the antennas of the mobile terminal are mounted on the outside of the bodywork.

10 . A method for selecting a radio transmission channel from a group of radio transmission channels, which each correspond to at least one of different transmission technologies and use different infrastructure components, in order to set up a data link between a mobile unit and a central unit, wherein
the central unit can be connected to a first local unit that is arranged in a regional area and that can be used to set up a data transmission link to the mobile unit by means of a first radio transmission channel that corresponds to a first transmission technology from the at least one of different transmission technologies and uses a first infrastructure component, the central unit can be connected to a second local unit that is arranged in the regional area and that can be used to set up a connection to the mobile unit using a second radio transmission channel that corresponds to a second transmission technology from the at least one of the different transmission technologies and uses a second infrastructure component, wherein the mobile unit has at least two radio units that are each designed for data transmission using one of the two radio transmission channels, and wherein the radio transmission channel is selected from the group of radio transmission channels based on control data that are produced and stored outside the mobile unit.

11 . The method as claimed in claim 10 , wherein the control data are at least one of produced, provided and transmitted to the mobile unit by the central unit or at least one of the local units.

12 . The method as claimed in claim 10 , wherein the selection is made in the mobile unit.

13 . The method as claimed in claim 10 , wherein the selection of the radio transmission channel from the group of radio transmission channels involves the use of data pertaining to at least one earlier radio link, as historical data, for at least one of the radio transmission channels in the regional area.

14 . The method as claimed in claim 13 , wherein the historical data are at least one of captured, provided and stored in at least one of the mobile unit, in the local unit, in the central unit and in a further data source.

15 . The method as claimed in claim 13 , wherein the historical data are geodata-referenced, wherein the selection is made on the basis of (i) at least one of position finding for the mobile unit and the geodata-referenced historical data, and (ii) the historical data being time-referenced, with the selection being made on the basis of timing and the time-referenced historical data.

16 . The method as claimed in claim 15 , wherein the position finding for the mobile unit is performed based on a navigation system, wherein a route stored in the navigation system, along which the mobile unit moves, and the geodata-referenced historical data are used to precondition the respective selection process for the radio transmission channel for road sections along the route.

17 . The method as claimed in one of claim 10 , wherein the selection of the radio transmission channel comprises an interaction of at least one of a controller provided in the mobile unit, a controller provided in the central unit, and a controller provided in one of the local units.

18 . The method as claimed in claim 10 , wherein the radio transmission channel is selected from the group of radio transmission channels based on control data that are at least one of produced and stored outside the mobile unit.

19 . The method as claimed in claim 10 , wherein the mobile unit is a vehicle.

20 . The method as claimed in claim 10 , wherein the mobile unit contains a first controller for controlling the radio link of the first transmission technology and the first infrastructure component, and a second controller for controlling the radio link of the second transmission technology and the second infrastructure component.

21 . The method as claimed in claim 10 , wherein at least one controller of the mobile unit contains at least one sensor that is used to capture measured values that are definitive for the quality of the radio transmission, and wherein

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Klemp Oliver
• Posselt Adrian
• Ekiz Levent-Yusuf
• Lottermann Christian

Classifications

• H04W48/18

  Selecting a network or a communication service · CPC title

• H04B7/088

  using beam selection · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04B7/086

  using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming · CPC title