Method for measuring interference of neighboring base station in wireless communication system and method for supporting interference measurement

A method of a base station supporting interference measurement, in a wireless communication system, the method comprising:

• determining a first resource group and a second resource group respectively containing resource elements of X number of zero power channel state information reference signals for interference measurement, wherein X is a positive integer;
• selecting Y (Y≦X) number of resource elements from the first resource group according to a first index and selecting Y number of resource elements from the second resource group according to a second index, wherein Y is a positive integer;
• and
• performing muting in the 2Y number of selected resource elements on which interference of a neighboring station is measured by a user equipment served by the base station,
• wherein the first index is determined by a first formula:
• P
• hop
• j
• ⁡
• (
• i
• )
• =
• (
• P
• hop
• j
• ⁡
• (
• i
• -
• 1
• )
• +
• (
• ∑
• k
• =
• i
• ·
• N
• +
• 1
• i
• ·
• N
• +
• O
• ⁢
• ⁢
• c
• ⁡
• (
• k
• )
• ×
• 2
• k
• -
• (
• i
• ·
• N
• +
• 1
• )
• )
• ⁢
• mod
• ⁡
• (
• R
• -
• 1
• )
• +
• 1
• )
• ⁢
• mod
• ⁢
• ⁢
• R
• ,
• where ‘i’ denotes a resource block index, ‘j’ denotes a resource group index, ‘c(k)’ denotes a pseudo-random sequence, Phopj denotes a hopping pattern index of a (j+1) group, ‘mod’ denotes a modulo operation, and ‘R’, ‘N’, and ‘O’ are predetermined positive integers respectively.

A user equipment configured to measure interference of a neighboring base station in a wireless communication system, the user equipment comprising:

• a transceiver;
• an antenna connected to the transceiver;
• and
• a processor connected to the transceiver and configured to:
• determine a first resource group and a second resource group respectively containing resource elements of X number of zero power channel state information reference signals for interference measurement, wherein X is a positive integer;
• select Y (Y≦X) number of resource elements from the first resource group according to a first index and selecting Y number of resource elements from the second resource group according to a second index, wherein Y is a positive integer;
• measure the interference of the neighboring base station based on a position of the 2Y number of selected resource elements on which muting is performed by a serving base station of the user equipment;
• and
• transmit information about the measured interference to the serving base station, wherein the first index is determined by a first formula:
• P
• hop
• ⁡
• (
• i
• )
• =
• (
• P
• hop
• ⁡
• (
• i
• -
• 1
• )
• +
• (
• ∑
• k
• =
• i
• ·
• N
• +
• 1
• i
• ·
• N
• +
• O
• ⁢
• ⁢
• c
• ⁡
• (
• k
• )
• ×
• 2
• k
• -
• (
• i
• ·
• N
• +
• 1
• )
• )
• ⁢
• mod
• ⁡
• (
• R
• -
• 1
• )
• +
• 1
• )
• ⁢
• mod
• ⁢
• ⁢
• R
• ,
• where ‘i’ denotes a resource block index, ‘j’ denotes a resource group index, ‘c(k)’ denotes a pseudo-random sequence, Phopj denotes a hopping pattern index of a (j+1) group, ‘mod’ denotes a modulo operation, and ‘R’, ‘N’, and ‘O’ are predetermined positive integers respectively.