US 2026/0291546 A1 · METHOD AND APPARATUS FOR DOPPLER SHIFT COMPENSATION IN COMMUNICATION SYSTEM

Abstract

This first communication node operation method for accessing a TN and an NTN may comprise the steps of: receiving, from a first TN cell, first linkage information including information about one or more NTN cells including at least the first NTN cell in a first TN cell area overlapping a first NTN cell area; checking location information of a first satellite for forming the first NTN cell included in the first linkage information; receiving, from the first NTN cell, a first signal to which DS pre-compensation based on the location of a first reference point of the first NTN cell is applied; and applying, with respect to the received first signal, additional DS compensation based on location information of a first satellite, location information of the first reference point, and location information of the first communication node.

Claims19

Dependent claims

An operation method of a first communication node accessing a terrestrial network (TN) and a non-terrestrial network (NTN), the operation method comprising:

receiving, from a first TN cell, first linkage information including information on one or more NTN cells including at least a first NTN cell, in a coverage of the first TN cell overlapping with a coverage of the first NTN cell;
identifying information on a location of a first satellite forming the first NTN cell and information on a location of a first reference point of the first NTN cell, which are included in the first linkage information;
receiving, from the first NTN cell, a first signal to which a first Doppler shift (DS) pre-compensation is applied based on the location of the first reference point;
and
applying a first additional DS compensation to the received first signal, the first additional DS compensation being based on the location of the first satellite, the location of the first reference point, and a location of the first communication node.

2 more elements

An operation method of a first terrestrial network (TN) cell in a communication system where a TN and a non-terrestrial network (NTN) coexist, the operation method comprising:

receiving first linkage information including information on one or more NTN cells from a linkage management device connected to one or more TN cells including at least the first TN cell and the one or more NTN cells;
identifying a first NTN cell corresponding to the first TN cell among the one or more NTN cells based on the first linkage information;
generating second linkage information corresponding to the first NTN cell based on the first linkage information;
and
transmitting the second linkage information in downlink within a coverage of the first TN cell,
wherein the second linkage information includes information on a location of a first satellite forming the first NTN cell and information on a location of a first reference point of the first NTN cell, and the information included in the second linkage information is used to determine an additional Doppler shift (DS) compensation to be applied to a first signal to which a DS pre-compensation is applied, the first signal being transmitted from the first NTN cell and received by each of one or more communication nodes receiving the second linkage information in downlink.

3 more elements

An operation method of a linkage management device in a communication system where a terrestrial network (TN) and a non-terrestrial network (NTN) coexist, the operation method comprising:

receiving first linkage information on one or more NTN cells from the one or more NTN cells connected to the linkage management device;
identifying information on a first NTN cell corresponding to a first TN cell among the one or more NTN cells based on the first linkage information;
generating second linkage information corresponding to the first NTN cell based on the first linkage information;
and
transmitting the second linkage information to the first TN cell,
wherein the second linkage information includes information on a location of a first satellite forming the first NTN cell and information on a location of a first reference point of the first NTN cell, and the information included in the second linkage information is used to determine an additional Doppler shift (DS) compensation to be applied to a first signal to which a DS pre-compensation is applied, the first signal being transmitted from the first NTN cell and received by each of one or more communication nodes within a coverage of the first TN cell.

3 more elements

Dependencies are inferred from the claim text.

Method and apparatus for doppler shift compensation in communication system

Life of this patent

Method and apparatus for doppler shift compensation in communication system

Life of this patent

Abstract

Claims19