Method and system for enabling of cross-link interference measurement using CLI-RS resource in wireless network

Patent metadata

Field	Value
Publication number	US-11411665-B2
Application number	US-202016739594-A
Country	US
Kind code	B2
Filing date	Jan 10, 2020
Priority date	Jan 11, 2019
Publication date	Aug 9, 2022
Grant date	Aug 9, 2022

Abstract

The method includes configuring a first CLI-RS configuration at a first UE ( 200 a ). Further, the method includes configuring a second CLI-RS configuration at a second UE ( 200 b ). Further, the method includes generating a CLI-RS sequence using a common CLI-RS reference point known to the first UE ( 200 a ) and the second UE ( 200 b ). Further, the method includes filling the CLI-RS sequence in the first set of CLI-RS resources indicated in the first CLI-RS configuration. Further, the method includes transmitting the CLI-RS sequence filled in the first set of CLI-RS resources indicated in the first CLI-RS configuration to the second UE ( 200 b ). Further, the method includes receiving the CLI-RS sequence transmitted by the first UE ( 200 a ). Further, the method includes processing the received CLI-RS sequence based on the second CLI-RS configuration.

First claim

What is claimed is:

1. A method for enabling a cross link interference (CLI) measurement using a CLI reference signal (CLI-RS) resource in a wireless network ( 1000 ), wherein the method comprises:
receiving, by a first BS ( 100 a ), a first CLI-RS configuration by one of a second BS ( 100 b ) and a centralized network entity ( 300 ) connected to the first BS ( 100 a ), wherein the first CLI-RS configuration comprises at least a first set of CLI-RS resources with a common reference point;
transmitting, by the first Base station (BS) ( 100 a ) associated with a first user equipment (UE) ( 200 a ), the first CLI-RS configuration to the first UE ( 200 a );
receiving, the second BS ( 100 b ), a second CLI-RS configuration by one of the first BS ( 100 a ) and the centralized network entity ( 300 ) connected to the second BS ( 100 b ), wherein the second CLI-RS configuration comprises at least a second set of CLI-RS resources with the common reference point
transmitting, by the second BS ( 100 b ) associated with a second UE ( 200 b ), the second CLI-RS configuration to the second UE ( 200 b ), wherein the common reference point is a frequency domain resource location, wherein the first set of CLI-RS resources indicated by the first CLI-RS configuration overlaps with the second set of CLI-RS resources indicated in the second CLI-RS configuration;
generating, by the first UE ( 200 a ), a CLI-RS sequence using the first CLI-RS configuration;
filling, by the first UE ( 200 a ), the CLI-RS sequence in the first set of CLI-RS resources indicated in the first CLI-RS configuration starting from the common reference point;
transmitting, by the first UE ( 200 a ), the CLI-RS sequence to the second UE ( 200 b );
receiving, by the second UE ( 200 b ), the CLI-RS sequence transmitted by the first UE ( 200 a ); and
processing, by the second UE ( 200 b ), the received CLI-RS sequence in overlapped part of the first set of CLI-RS resources and the second set of CLI-RS resources based on the second CLI-RS configuration.

2. The method as claimed in claim 1 , wherein the processing the received CLI-RS sequence in the overlapped part of the first set of CLI-RS resources and the second set of CLI-RS resources based on the second CLI-RS configuration comprises:
determining, by the second UE ( 200 b ), a received power of the CLI-RS sequence; and
reporting, by the second UE ( 200 b ), the received power to the second BS ( 100 b ) based on a reporting configuration provided by the second BS ( 100 b ).

3. The method as claimed in claim 2 , wherein the received power is determined using at least one of a CLI-reference signal received power (CLI-RSRP) and CLI-received signal strength indicator (CLI-RSSI).

4. The method as claimed in claim 3 , wherein the CLI-RSRP is determined by:
detecting, by the second UE ( 200 b ), the CLI-RS sequence transmitted by the first UE ( 200 a );
measuring, by the second UE ( 200 b ), a linear average of the received power of the CLI-RS sequence over the second set of CLI-RS resources indicated in the second CLI-RS configuration; and
determining, by the second UE ( 200 b ), the CLI-RSRP based on the detected the CLI-RS sequence and the measured linear average of the received power.

5. The method as claimed in claim 3 , wherein the CLI-RSSI is determined by:
measuring, by the second UE ( 200 b ), a linear average of the received power of the CLI-RS sequence over the second set of CLI-RS resources indicated in the second CLI-RS configuration; and
determining, by the second UE ( 200 b ), the CLI-RSSI based on the measured linear average.

6. The method as claimed in claim 3 , wherein the reporting configuration comprises the second CLI-RS configuration and at least one of the CLI-RSRP and the CLI-RSSI.

7. The method as claimed in claim 1 , wherein the first set of CLI-RS resources indicated in the first CLI-RS configuration comprise at least one of a start index of frequency domain resource, a number of frequency domain resource, a start index of the time domain resource, a number of time domain resources, a CLI-RS sequence Identifier (ID), a number of antenna ports, a time domain behavior, the common reference point for the CLI-RS sequence generation and a quasi-co-location (QCL) assumption.

8. The method as claimed in claim 1 , wherein the second set of CLI-RS resources indicated in the second CLI-RS configuration comprise at least one of a start index of frequency domain resource, a number of frequency domain resource, a start index of the time domain resource, a number of time domain resources, a CLI-RS sequence Identifier (ID), a number of antenna ports, a time domain behavior, the common reference point for the CLI-RS sequence generation and a quasi-co-location (QCL) assumption.

9. The method as claimed in claim 8 , wherein the common reference point used to identify the start index of resource in frequency domain for the CLI-RS sequence generation.

10. The method as claimed in claim 1 , wherein the first set of CLI-RS resources indicated by the first CLI-RS configuration overlaps in one of fully and partially with the second set of CLI-RS resources indicated in the second CLI-RS configuration.

11. The method as claimed in claim 1 , wherein the second CLI-RS configuration configured at the second UE ( 200 b ) is one of a Zero Power (ZP-RS) configuration.

12. The method as claimed in claim 11 , wherein the ZP-RS configuration indicates at least one resource over which the second BS ( 100 b ) has not transmitted any signal.

13. The method as claimed in claim 12 , wherein the at least one resources overlaps in one of fully and partially with the first set of CLI-RS resources indicated in the first CLI-RS configuration.

14. The method as claimed in claim 1 , wherein the first CLI-RS configuration configured at the first UE ( 200 a ) is a sounding reference signal (SRS) configuration.

15. The method as claimed in claim 14 , wherein the SRS configuration contains a plurality of parameters comprising a quasi-co-location assumption (QCL), SRS sequence ID, pointA, a frequency domain shift, a cyclic shift, a numerology, comb pattern for SRS transmission, a comb offset, number of resource blocks,, a bandwidth part configuration, a start symbol of SRS, number of SRS symbols, the common reference point for SRS sequence and repetition factor.

16. The method as claimed in claim 15 , wherein at least one of the SRS sequence ID and the common reference point for SRS sequence generation are used to generate a SRS sequence.

17. The method as claimed in claim 15 , wherein the plurality of parameters are limited based on a number of UEs suffering from the CLI.

18. The method as claimed in claim 1 , wherein transmitting, by the first UE ( 200 a ), the CLI-RS sequence comprises one of:
repeating, by the first UE ( 200 a ), the first set of CLI-RS resources over a number of consecutive Orthogonal frequency-division multiplexing (OFDM) symbols with a block cyclic prefix (CP); and
repeating, by the first UE ( 200 a ), the first set of CLI-RS resources over a number of consecutive OFDM symbols, with a phase rotation except a last symbol of the set of OFDM symbols.

19. The method as claimed in the claim 18 , wherein the block CP is a common CP for the set of consecutive OFDM symbols.

20. A system for enabling a cross link interference (CLI) measurement using a CLI reference signal (CLI-RS) resource in a wireless network ( 1000 ), wherein the system comprises:
a

Assignees

• Centre Of Excellence In Wireless Tech
• Indian Inst Tech Madras

Inventors

• Masal Abhijeet Abhimanyu
• Dey Priyanka
• Kaimalettu Sunil
• Klutto Milleth Jeniston Deviraj
• Ramamurthi Bhaskar

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04W72/541

  using the level of interference · CPC title

• H04B17/328

  Reference signal received power [RSRP]; Reference signal received quality [RSRQ] · CPC title

• H04B17/345 Primary

  Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title