Interference control method in wireless communication system and apparatus for the same
A method for an eNB to control inter-cell interference in a wireless communication system includes receiving information on a plurality of time-domain interference patterns corresponding to sub-frequency-domain interference control information on a plurality of sub-frequency domains constituting a system frequency domain, the plurality of time-domain interference control patterns indicating interference control for subframes of the plurality of sub-frequency domains, and transmitting, to a UE, scheduling information about the UE based on information on at least one of the plurality of time-domain interference control patterns, wherein each of the plurality of time-domain interference control patterns is configured to have more subframes for which transmission power restriction is set (referred to as “transmission power-restricted subframes” hereinafter) as an inter-cell interference level indicated by the sub-frequency-domain interference control information increases.
1. A method for an evolved Node B (eNB) to control inter-cell interference in a wireless communication system, the method comprising:
receiving time-domain interference control patterns which are respectively set based on a corresponding sub-frequency-domain interference control value,
wherein the corresponding sub-frequency-domain interference control value indicates a downlink transmission power level or an uplink inter-cell interference level of a corresponding one of a plurality of sub-frequency domains; and
transmitting, to a user equipment (UE), scheduling information for the UE, the scheduling information being based on information on at least one of the time-domain interference control patterns,
wherein one of the time-domain interference control patterns is set as a subset of another time-domain interference control pattern, and
wherein the time-domain interference control patterns are configured such that a number of transmission power-restricted subframes with a specific index indicated by each of the time-domain interference control patterns is maximized.
2. The method according to claim 1 , wherein the time-domain interference control patterns are represented as a combined time-domain interference control pattern, and
wherein information on the combined time-domain interference control pattern corresponds to a pattern-sequence having a predetermined length.
3. The method according to claim 1 , wherein the time-domain interference control patterns include at least one of an uplink time-domain interference control pattern and a downlink time-domain interference control pattern, and
wherein the uplink time-domain interference control pattern is restricted by the downlink time-domain interference control pattern.
4. The method according to claim 3 , wherein, if a subframe #n of the downlink time-domain interference control pattern is set as the transmission power-restricted subframe, a subframe #n+k of the uplink time-domain interference control pattern is set as the transmission power-restricted subframe, and
wherein n and k are integers greater than 0.
5. An evolved Node B (eNB) for controlling inter-cell interference in a wireless communication system, the eNB comprising:
a radio frequency (RF) unit; and
a processor configured to control the RF unit,
wherein the processor is further configured to receive time-domain interference control patterns which are respectively set based on a corresponding sub-frequency-domain interference control value,
wherein the corresponding sub-frequency-domain interference control value indicates a downlink transmission power level or an uplink inter-cell interference level of a corresponding one of a plurality of sub-frequency domains and to transmit scheduling information about a user equipment (UE) based on information on at least one of the plurality of time-domain interference control patterns to the UE,
wherein the time-domain interference control patterns indicate interference control for subframes belong to a respective one of the plurality of sub-frequency domains,
wherein one of the time-domain interference control patterns is set as a subset of another time-domain interference control pattern, and
wherein the time-domain interference control patterns are configured such that a number of transmission power-restricted subframes with a specific index indicated by each of the time-domain interference control patterns is maximized.
6. The eNB according to claim 5 , wherein the time-domain interference control patterns are represented as a combined time-domain interference control pattern, and
wherein information on the combined time-domain interference control pattern corresponds to a pattern-sequence having a predetermined length.
7. The eNB according to claim 5 , wherein the time-domain interference control patterns include at least one of an uplink time-domain interference control pattern and a downlink time-domain interference control pattern, and
wherein the uplink time-domain interference control pattern is restricted by the downlink time-domain interference control pattern.
8. The eNB according to claim 7 , wherein, if a subframe #n of the downlink time-domain interference control pattern is set as the transmission power-restricted subframe, a subframe #n+k of the uplink time-domain interference control pattern is set as the transmission power-restricted subframe, and
wherein n and k are integers greater than 0.
9. An evolved Node B (eNB) for controlling inter-cell interference in a wireless communication system, the eNB comprising:
a radio frequency (RF) unit; and
a processor configured to control the RF unit,
wherein the processor is further configured to transmit, to a neighboring eNB, a time-domain interference control patterns which are respectively set based on a corresponding sub-frequency-domain interference control value,
wherein the corresponding sub-frequency-domain interference control value indicates a downlink transmission power level or an uplink inter-cell interference level of a corresponding one of a plurality of sub-frequency domains,
wherein at least one of the time-domain interference control patterns is used to schedule for a user equipment (UE) served by the neighboring eNB,
wherein one of the time-domain interference control patterns is set as a subset of another time-domain interference control pattern, and
wherein the time-domain interference control patterns are configured such that a number of transmission power-restricted subframes with a specific index indicated by each of the time-domain interference control patterns is maximized.
10. The eNB according to claim 9 , wherein the time-domain interference control patterns are represented as a combined time-domain interference control pattern, and
wherein information on the combined time-domain interference control pattern corresponds to a pattern-sequence having a predetermined length.
11. The eNB according to claim 9 , wherein the time-domain interference control patterns include at least one of an uplink time-domain interference control pattern and a downlink time-domain interference control pattern, and
wherein the uplink time-domain interference control pattern is restricted by the downlink time-domain interference control pattern.
12. The eNB according to claim 11 , wherein, if a subframe #n of the downlink time-domain interference control pattern is set as the transmission power-restricted subframe, a subframe #n+k of the uplink time-domain interference control pattern is set as the transmission power-restricted subframe, and
wherein n and k are integers greater than 0.