Remote interference management method, gNB, electronic device, and readable storage medium
The disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as long term evolution (LTE). The disclosure provides a remote interference management method, a gNB, an electronic device, a readable storage medium, and a base station for performing inter-base station interference coordination. The method includes steps of: determining, by a gNB, a mapping relationship between a gNB set ID and a RIM-RS according to received configuration information; transmitting, by the gNB, the RIM-RS according to the allocated gNB set ID and the mapping relationship; and/or performing RIM-RS detection, by the gNB, determining gNB set ID information through the detected RIM-RS according to the mapping relationship, and reporting the determined gNB set ID information. The present disclosure determines the mapping relationship between the gNB set ID and the RIM-RS according to the received configuration information, and further transmits and/or detects the RIM-RS based on the mapping relationship, thus simplifying signaling interaction information and improving the communication flexibility of the RIM-RS with multiple functions. The base station includes: a transceiver, configured to transmit signals and/or receive signals; and a processor, configured to: control the transceiver to receive a physical signal transmitted by a second base station and perform interference measurement based on the received physical signal; and control the transceiver to report an interference measurement result to the second base station or a management center, to cause the second base station to perform interference coordination for at least the first base station based on the interference measurement result reported by the first base station or configuration by the management center.
1. A method of remote interference management (RIM), performed by a first base station in a wireless communication system, the method comprising:
identifying configuration information including a first base station set identifier (ID) for a first remote interference management reference signal (RIM-RS) and a second base station set ID for a second RIM-RS, wherein a set of available sequences corresponding to the first base station set ID is configured with the first base station;
transmitting, to a second base station, the first RIM-RS determined based on the first base station set ID of the configuration information in a first period indicated by the first base station set ID;
in response to remote interference being reduced, receiving, from the second base station, the second RIM-RS in a second period after the first period and indicated by the second base station set ID of the configuration information;
in case that the remote interference is not reduced to a designated level, transmitting, to the second base station, a third RIM-RS including first bits corresponding to a first sequence index, wherein the first sequence index is included in a first half of sequence indexes for the set of the available sequences and wherein the first half of the sequence indexes indicates the remote interference exists; and
in case that the remote interference is reduced to the designated level based on the first RIM-RS, transmitting, to the second base station, a third RIM-RS including second bits corresponding to a second sequence index, wherein the second sequence index is included in a second half of the sequence indexes for the set of the available sequences and wherein the second half of the sequence indexes indicates the remote interference is reduced to the designated level,
wherein the second half of the sequence indexes follows the first half of the sequence indexes,
wherein a time period in which the first RIM-RS and the third RIM-RS are transmitted is divided into a first period for the first RIM-RS and a third period for the third RIM-RS which follows the first period,
wherein the first period is indexed with a first number of transmission occasions based on a number of switching points, included in the time period, between a downlink pattern and an uplink pattern, and the third period is indexed with a second number of transmission occasions based on the number of the switching points, and
wherein the first base station set ID indicates a first index corresponding to a first occasion in which the first RIM-RS is transmitted among the first period, and a second index corresponding to a second occasion in which the third RIM-RS is transmitted among the third period.
2. The method of claim 1 , further comprising:
detecting the second RIM-RS;
determining information on the second base station set ID based on the second RIM-RS; and
reporting the information on the second base station set ID.
3. The method of claim 1 , wherein the configuration information comprises at least one of DL-UL pattern period, transmission period of RIM-RS, time period allocation information of each type of the RIM-RS in the transmission period of the RIM-RS, a number of repetitions of each type of RIM-RS, a number of frequency domain resources of the RIM-RS, or the set of available sequences on transmission occasions of the RIM-RS.
4. The method of claim 2 ,
wherein a type of the first RIM-RS comprises at least one of a first type RIM-RS for a near base station interference measurement, and a second type RIM-RS for a remote base station interference measurement.
5. The method of claim 4 , wherein a number of repetitions of the first type RIM-RS for the near base station interference measurement is equal to a number of repetitions of the second type RIM-RS for the remote base station interference measurement.
6. The method of claim 2 , the method further comprising:
stopping a transmission of the third RIM-RS including the first bits in case that the second RIM-RS is not detected.
7. A first base station in a wireless communication system, the first base station comprising:
at least one transceiver; and
at least one processor coupled with the at least one transceiver,
wherein the at least one processor is configured to:
identify configuration information including a first base station set identifier (ID) for a first remote interference management reference signal (RIM-RS) and a second base station set ID for a second RIM-RS, wherein a set of available sequences corresponding to the first base station set ID is configured with the first base station,
transmit, to a second base station, the first RIM-RS determined based on the first base station set ID of the configuration information in a first period indicated by the first base station set ID,
in response to remote interference being reduced, receive, from the second base station, the second RIM-RS in a second period after the first period and indicated by the second base station set ID of the configuration information,
in case that the remote interference is not reduced to a designated level, transmit, to the second base station, a third RIM-RS including first bits corresponding to a first sequence index, wherein the first sequence index is included in a first half of sequence indexes for the set of the available sequences and wherein the first half of the sequence indexes indicates the remote interference exists, and
in case that the remote interference is reduced to the designated level based on the first RIM-RS, transmit, to the second base station, a third RIM-RS including second bits corresponding to a second sequence index, wherein the second sequence index is included in a second half of the sequence indexes for the set of the available sequences and wherein the second half of the sequence indexes indicates the remote interference is reduced to the designated level,
wherein the second half of the sequence indexes follows the first half of the sequence indexes,
wherein a time period in which the first RIM-RS and the third RIM-RS are transmitted is divided into a first period for the first RIM-RS and a third period for the third RIM-RS which follows the first period,
wherein the first period is indexed with a first number of transmission occasions based on a number of switching points, included in the time period, between a downlink pattern and an uplink pattern, and the third period is indexed with a second number of transmission occasions based on the number of the switching points, and
wherein the first base station set ID indicates a first index corresponding to a first occasion in which the first RIM-RS is transmitted among the first period, and a second index corresponding to a second occasion in which the third RIM-RS is transmitted among the third period.
8. The first base station of claim 7 , wherein the at least one processor is further configured to:
detect the second RIM-RS,
determine information on the second base station set ID based on the second RIM-RS, and
report the information on the second base station set ID.
9. The first base station of claim 7 , wherein the configuration information comprises at least one of DL-UL pattern period, transmission period of RIM-RS, time period allocation information of each type of the RIM-RS in the transmission period of the RIM-RS, a number of repetitions of each type of RIM-RS, a number of frequency domain resources of the RIM-RS, or the set of available sequences on transmission occasions of the RIM-RS.
10. The first base station of claim 8 ,
wherein a type of the first RIM-RS comprises at least one of a first type RIM-RS for a near base station interference measurement, and a second type RIM-RS for a remote base station interference measurement.
11. The first base station of claim 10 , wherein a number of repetitions of the first type RIM-RS for the near base station interference measurement is equal to a number of repetitions of the second type RIM-RS for the remote base station interference measurement.
12. The first base station of claim 8 , wherein the processor is further configured to:
stop a transmission of the third RIM-RS including the second bits in case that the second RIM-RS is not detected.
13. A method of remote interference management (RIM), performed by a second base station in a wireless communication system, the method comprising:
receiving, from a first base station, a first remote interference management reference signal (RIM-RS) in a first period indicated by a first base station set identifier (ID) of configuration information, wherein a set of available sequences corresponding to the first base station set ID is configured with the second base station;
identifying the first base station based on a mapping relationship between the first base station set identifier (ID) and the first RIM-RS;
performing an interference reduction;
transmitting, to the first base station, a second RIM-RS in a second period after the first period and indicated by a second base station set ID of the configuration information;
in case that remote interference is not reduced to a designated level, receiving, from the first base station, a third RIM-RS including first bits corresponding to a first sequence index, wherein the first sequence index is included in a first half of sequence indexes for the set of the available sequences and wherein the first half of the sequence indexes indicates the remote interference exists; and
in case that the remote interference is reduced to the designated level:
receiving, from the first base station, a third RIM-RS including second bits corresponding to a second sequence index, wherein the second sequence index is included in a second half of the sequence indexes for the set of the available sequences and wherein the second half of the sequence indexes indicates the remote interference is reduced to the designated level; and
restoring a configuration changed by the interference reduction,
wherein the second half of the sequence indexes follows the first half of the sequence indexes,
wherein a time period in which the first RIM-RS and the third RIM-RS are received is divided into a first period for the first RIM-RS and a third period for the third RIM-RS which follows the first period,
wherein the first period is indexed with a first number of transmission occasions based on a number of switching points, included in the time period, between a downlink pattern and an uplink pattern, and the third period is indexed with a second number of transmission occasions based on the number of the switching points, and
wherein the first base station set ID indicates a first index corresponding to a first occasion in which the first RIM-RS is received among the first period, and a second index corresponding to a second occasion in which the third RIM-RS is received among the third period.
14. A second base station in a wireless communication system, the second base station comprising
at least one transceiver;
at least one processor coupled with the at least one transceiver and configured to:
receive, from a first base station, a first remote interference management reference signal (RIM-RS) in a first period indicated by a first base station set identifier (ID) of configuration information, wherein a set of available sequences corresponding to the first base station set ID is configured with the second base station,
identify the first base station based on a mapping relationship between the first base station set identifier (ID) and the first RIM-RS,
perform an interference reduction,
transmit, to the first base station, a second RIM-RS in a second period after the first period and indicated by a second base station set ID of the configuration information,
in case that remote interference is not reduced to a designated level, receive, from the first base station, a third RIM-RS including first bits corresponding to a first sequence index, wherein the first sequence index is included in a first half of sequence indexes for the set of the available sequences and wherein the first half of the sequence indexes indicates the remote interference exists, and
in case that the remote interference is reduced to the designated level:
receive, from the first base station, a third RIM-RS including second bits corresponding to a second sequence index, wherein the second sequence index is included in a second half of the sequence indexes for the set of the available sequences and wherein the second half of the sequence indexes indicates the remote interference is reduced to the designated level, and
restore a configuration changed by the interference reduction,
wherein the second half of the sequence indexes follows the first half of the sequence indexes,
wherein a time period in which the first RIM-RS and the third RIM-RS are received is divided into a first period for the first RIM-RS and a third period for the third RIM-RS which follows the first period,
wherein the first period is indexed with a first number of transmission occasions based on a number of switching points, included in the time period, between a downlink pattern and an uplink pattern, and the third period is indexed with a second number of transmission occasions based on the number of the switching points, and
wherein the first base station set ID indicates a first index corresponding to a first occasion in which the first RIM-RS is received among the first period, and a second index corresponding to a second occasion in which the third RIM-RS is received among the third period.