Method and apparatus for mitigating interference in a wireless communication system

Patent metadata

Field	Value
Publication number	US-12550082-B2
Application number	US-202217986110-A
Country	US
Kind code	B2
Filing date	Nov 14, 2022
Priority date	Nov 15, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A communication method of a base station may include: configuring a first band as a communication band from an entire carrier frequency band of the base station, the entire carrier frequency band including the first band and a second band; transmitting a synchronization signal in the first band by beamforming in one of both directions of a moving path of a transportation means; communicating with a terminal by beamforming in a same direction as the synchronization signal in the first band; and transmitting a synchronization signal in the second band by beamforming in the same direction as the synchronization signal in the first band.

First claim

What is claimed is:

1 . A communication method of a base station, comprising:
configuring a first band as a communication band from an entire carrier frequency band of the base station, the entire carrier frequency band being configured with the first band and a second band; transmitting, to a first direction among two directions of a moving path of a transportation means by beamforming, a synchronization signal in the first band; communicating with a first terminal by beamforming in a same direction as the synchronization signal in the first band; and transmitting, to the first direction by beamforming, a synchronization signal in the second band to enable a second terminal communicating with a second base station to search for the base station, wherein the second base station communicates with the second terminal using first direction beam by beamforming in the second band.

2 . The communication method according to claim 1 , further comprising:
when at least part of frequency resources of the communication band are not used for communication, generating a resource use permission message for notifying an adjacent base station; and transmitting the resource use permission message to the adjacent base station.

3 . The communication method according to claim 1 , further comprising, when resource use permission messages for the second band are received from two or more adjacent base stations, communicating with the terminal using resources of the second band indicated by the resource use permission messages.

4 . The communication method according to claim 3 , wherein each of the resource use permission messages includes an indication for permitting use of a specific frequency resource for the second band, information indicating a start time at which the specific frequency resource is available, and information indicating available slot(s) based on the start time.

5 . The communication method according to claim 3 , wherein when communicating with the terminal using the resources of the second band, the base station uses only common resources among resources permitted by the resource use permission messages received from the adjacent base stations.

6 . The communication method according to claim 1 , further comprising:
obtaining information on a distance between the base station and each of terminals communicating in the first band; transmitting a control message indicating to switch a communication band to the second band to a terminal located within a preset threshold distance from the base station; and communicating with the terminal located within the preset threshold distance from the base station in the second band.

7 . The communication method according to claim 6 , wherein in the obtaining of the information on the distance, a timing advance (TA) value based on a signal received from each of the terminals is used.

8 . The communication method according to claim 6 , wherein the obtaining of the information on the distance comprises:
transmitting a first message requesting location information to each of the terminals; receiving a second message including the location information from each of the terminals; and calculating the distance using a location of the base station and the location information of each of the terminals.

9 . The communication method according to claim 1 , wherein the synchronization signal transmitted in the first band and the synchronization signal transmitted in the second band are configured as distinguishable signals from each other.

10 . A base station comprising:
a processor; and a transceiver for communicating with at least one terminal, wherein the processor is executed to perform: configuring a first band as a communication band from an entire carrier frequency band of the base station, the entire carrier frequency band being configured with the first band and a second band; controlling the transceiver to transmit, to a first direction among two directions of a moving path of a transportation means by beamforming a synchronization signal in the first band; controlling the transceiver to communicate with a first terminal by beamforming in a same direction as the synchronization signal in the first band; and controlling the transceiver to transmit, to the first direction by beamforming, a synchronization signal in the second band to enable a second terminal communicating with a second base station to search for the base station, wherein the second base station communicates with the second terminal using first direction beam by beamforming in the second band.

11 . The base station according to claim 10 , wherein the processor is further executed to perform:
when at least part of frequency resources of the communication band are not used for communication, generating a resource use permission message for notifying an adjacent base station; and controlling the transceiver to transmit the resource use permission message to the adjacent base station.

12 . The base station according to claim 11 , wherein the processor is further executed to perform: when resource use permission messages for the second band are received from two or more adjacent base stations, controlling the transceiver to communicate with the terminal using resources of the second band indicated by the resource use permission messages.

13 . The base station according to claim 12 , wherein each of the resource use permission messages includes an indication for permitting use of a specific frequency resource for the second band, information indicating a start time at which the specific frequency resource is available, and information indicating available slot(s) based on the start time.

14 . The base station according to claim 12 , wherein the processor is further executed to perform: when communicating with the terminal using the resources of the second band, using only common resources among resources permitted by the resource use permission messages received from the adjacent base stations.

15 . The base station according to claim 10 , wherein the processor is further executed to perform:
obtaining information on a distance between the base station and each of terminals communicating in the first band; controlling the transceiver to transmit a control message indicating to switch a communication band to the second band to a terminal located within a preset threshold distance from the base station; and controlling the transceiver to communicate with the terminal located within the preset threshold distance from the base station in the second band.

16 . The base station according to claim 15 , wherein in the obtaining of the information on the distance, a timing advance (TA) value based on a signal received from each of the terminals is used.

17 . The base station according to claim 15 , wherein in the obtaining of the information on the distance, the processor is further executed to perform:
controlling the transceiver to transmit a first message requesting location information to each of the terminals; controlling the transceiver to receive a second message including the location information from each of the terminals; and calculating the distance using a location of the base station and the location information of each of the terminals.

18 . The base station according to claim 10 , wherein the synchronization signal transmitted in the first band and the synchronization signal transmitted in the second band are configured as distinguishable signals from each other.

19 . A

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Kim Jun Hyeong
• Noh Go San
• Kim Il Gyu
• Park Man Ho
• Sung Nak Woon
• Song Jae Su
• Lee Nam Suk
• Chung Hee Sang
• Choi Min Suk

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W56/0045 Primary

  compensating for timing error by altering transmission time · CPC title

• H04W64/003

  locating network equipment · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04W56/00

  Synchronisation arrangements · CPC title