Information transmission method, base station, terminal, and communication system

Patent metadata

Field	Value
Publication number	US-12490083-B2
Application number	US-202118284492-A
Country	US
Kind code	B2
Filing date	Nov 26, 2021
Priority date	Mar 30, 2021
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

The present invention relates to the field of mobile communications, and provides an information transmission method, a base station, a terminal, and a communication system. In the present invention, an NR terminal reports LTE neighboring cell CRS interference inhibition capability information of the NR terminal to an NR base station, and the NR base station receives the LTE neighboring cell CRS interference inhibition capability information reported by the NR terminal.

First claim

What is claimed is:

1 . An information transmission method, comprising:
reporting, by a New Radio (NR) terminal to an NR base station, Long Term Evolution (LTE) neighbor cell Cell Reference Signal (CRS) interference mitigation capability information of the NR terminal, wherein the LTE neighbor cell CRS interference mitigation capability information comprises at least one of: whether the NR terminal supports LTE neighbor cell CRS interference mitigation without LTE neighbor cell CRS information from a network; or when New radio subcarrier spacing is 30 kHz, whether the NR terminal supports the LTE neighbor cell CRS interference mitigation.

2 . The information transmission method according to claim 1 , further comprising:
receiving, by the NR terminal, indication information related to LTE neighbor cell CRS interference mitigation that is sent by the NR base station through Radio Resource Control (RRC) signaling, wherein the indication information comprises at least one of enabling control information for the LTE neighbor cell CRS interference mitigation or the LTE neighbor cell CRS information.

3 . The information transmission method according to claim 2 , further comprising:
performing, by the NR terminal, interference mitigation according to the indication information.

4 . The information transmission method according to claim 3 , wherein the performing, by the NR terminal, interference mitigation according to the indication information comprises:
the NR terminal turning on or off the LTE neighbor cell CRS interference mitigation according to the enabling control information for the LTE neighbor cell CRS interference mitigation in a case where the indication information comprises the enabling control information for the LTE neighbor cell CRS interference mitigation; or the NR terminal turning on the LTE neighbor cell CRS interference mitigation according to the LTE neighbor cell CRS information and performing interference detection at a position corresponding to the LTE neighbor cell CRS information in a case where the indication information comprises the LTE neighbor cell CRS information.

5 . The information transmission method according to claim 2 , wherein the enabling control information for the LTE neighbor cell CRS interference mitigation is sent through lte-CRS-ToMatchAround signaling or other RRC signaling than the lte-CRS-ToMatchAround signaling.

6 . The information transmission method according to claim 2 , wherein the LTE neighbor cell CRS information comprises at least one of:
identification information, the number of CRS ports, MBSFN subframe configuration information, center frequency and system bandwidth, time slot number information, used cyclic prefix, or duplex mode, of an LTE neighbor cell having CRS interference with the NR cell where the NR terminal is currently located, wherein if the duplex mode is TDD, the LTE neighbor cell CRS information further comprises uplink/downlink subframe allocation information.

7 . The information transmission method according to claim 2 , wherein when the indication information comprises the LTE neighbor cell CRS information, the sending, by the NR base station to the NR terminal, the indication information related to the LTE neighbor cell CRS interference mitigation comprises:
the NR base station sending, to the NR terminal through the RRC signaling, a list containing one or more arrays, each array in the list indicating CRS information of a respective LTE neighbor cell having CRS interference with the NR cell where the NR terminal is currently located that is known by a network side, to indicate that the NR terminal turns on CRS interference mitigation of the respective LTE neighbor cell; or the NR base station sending, to the NR terminal through the RRC signaling, release information of the whole list or partial arrays, to indicate that the NR terminal releases the list or the partial arrays in the list and turns off CRS interference mitigation of the respective LTE neighbor cell.

8 . The information transmission method according to claim 1 , wherein the LTE neighbor cell CRS interference mitigation capability information comprises at least one of:
whether the NR terminal supports the LTE neighbor cell CRS interference mitigation; or whether the NR terminal supports LTE neighbor cell CRS interference mitigation in an asynchronous system.

9 . The information transmission method according to claim 1 , wherein the LTE neighbor cell CRS interference mitigation capability information further comprises a value indicating whether the NR terminal supports the LTE neighbor cell CRS interference mitigation, the number of LTE neighbor cells supportable by the NR terminal for performing the LTE neighbor cell CRS interference mitigation, or the number of component carriers supportable by the NR terminal for simultaneously performing the LTE neighbor cell CRS interference mitigation in a carrier aggregation scenario.

10 . An information transmission method, comprising:
receiving, by an NR base station, LTE neighbor cell CRS interference mitigation capability information reported by an NR terminal, wherein the LTE neighbor cell CRS interference mitigation capability information comprises at least one of: whether the NR terminal supports LTE neighbor cell CRS interference mitigation without LTE neighbor cell CRS information from a network; or when New radio subcarrier spacing is 30 kHz, whether the NR terminal supports the LTE neighbor cell CRS interference mitigation.

11 . The information transmission method according to claim 10 , further comprising:
sending, by the NR base station, indication information related to LTE neighbor cell CRS interference mitigation to the NR terminal through RRC signaling, wherein the indication information comprises at least one of enabling control information for the LTE neighbor cell CRS interference mitigation or the LTE neighbor cell CRS information.

12 . The information transmission method according to claim 11 , wherein
the NR base station sends, to the NR terminal, the indication information related to the LTE neighbor cell CRS interference mitigation, according to the LTE neighbor cell CRS interference mitigation capability information of the NR terminal and LTE neighbor cell information of an NR cell where the NR terminal is currently located.

13 . The information transmission method according to claim 12 , wherein the sending, by the NR base station to the NR terminal, the indication information related to the LTE neighbor cell CRS interference mitigation, according to the LTE neighbor cell CRS interference mitigation capability information of the NR terminal and LTE neighbor cell information of an NR cell where the NR terminal is currently located comprises:
the NR base station sending, to the NR terminal, enabling control information for turning on the LTE neighbor cell CRS interference mitigation and/or the LTE neighbor cell CRS information according to the LTE neighbor cell CRS interference mitigation capability information of the NR terminal and the LTE neighbor cell information of the NR cell where the NR terminal is currently located, when the NR terminal is determined to supports the LTE neighbor cell CRS interference mitigation, and the LTE neighbor cell has CRS interference with the NR cell where the NR terminal is currently located; or the NR base station sending, to the NR terminal, enabling control information for turning off the LTE neighbor cell CRS interference mitigation according to the LTE neighbor cell CRS interference mitigation capability information of the NR terminal and the LTE neighbor cell information

Assignees

• China Telecom Co Ltd

Inventors

• Wu Jingzhou
• Yang Shan
• She Xiaoming
• Chen Peng

Classifications

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04J11/0056

  Inter-base station aspects · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title