# US 9,520,974 B2 · Interference measurement method and apparatus for new carrier type > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,974 B2 - Document ID: US9520974B2 - Status: Granted - Kind: B2 - Application number: 14/193,500 - Filed: 2014-02-28 - Published: 2014-08-28 - Granted: 2016-12-13 - Earliest claimed: 2013-02-28 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hyoungyoul Yu; Younsun Kim; Hyojin Lee; Seunghoon Choi - Web page: https://patentgrep.com/patent/US9520974B2 ## CPC - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/0082: {at predetermined intervals} - H04L 5/0092: {Indication of how the channel is divided} - H04L 5/0023: {Time-frequency-space} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An Interference Measurement Resource (IMR) allocation method and apparatus for allocating resources for efficient interference measurement in a downlink in a system supporting a New Carrier Type (NCT) is provided. The interference measurement configuration method of a base station transmitting subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system includes determining whether a terminal supports a New Carrier Type (NCT) subframe, allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe, transmitting information on the allocated IMR to the terminal, and transmitting the subframe including the allocated IMR to the terminal. ## Claims ### Claim 1 An interference measurement configuration method of a base station transmitting subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system, the method comprising: determining whether a terminal supports a New Carrier Type (NCT) subframe; allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe; transmitting information on the allocated IMR to the terminal; and transmitting the subframe including the allocated IMR to the terminal. ### Claim 2 (depends on 1) The method of claim 1, wherein the IMR is allocated at the REs where other signals are not mapped when the subframe does not include the CRS. ### Claim 3 (depends on 1) The method of claim 1, wherein the IMR is allocated, when the subframe includes the CRS, at the REs where other signals including the CRS are not mapped. ### Claim 4 (depends on 1) The method of claim 1, wherein the IMR is allocated, when the subframe includes new DeModulation Reference Signals (DMRS), at the REs where other signals including the new DMRS are not mapped. ### Claim 5 (depends on 4) The method of claim 4, wherein the IMR is arranged symmetrically in a first slot and a second slot of the subframe. ### Claim 6 An interference measurement method of a terminal receiving subframes including, or not including, Cell-specific Reference Signals (CRS) in a wireless communication system, the method comprising: determining whether a base station supports a New Carrier Type (NCT) subframe; receiving, when the base station supports the NCT subframe, information on Interference Measurement Resources (IMR) from the base station at Resource Elements (REs) where other signals are not mapped in the subframe; receiving the subframe including the allocated IMR from the base station; measuring interference using the IMR; and reporting a measurement report to the base station. ### Claim 7 (depends on 6) The method of claim 6, wherein the IMR is allocated at the REs where other signals are not mapped when the subframe does not include the CRS. ### Claim 8 (depends on 6) The method of claim 6, wherein the IMR is allocated, when the subframe includes the CRS, at the REs where other signals including the CRS are not mapped. ### Claim 9 (depends on 6) The method of claim 6, wherein the IMR is allocated, when the subframe includes new DeModulation Reference Signals (DMRS), at the REs where other signals including the new DMRS are not mapped. ### Claim 10 (depends on 9) The method of claim 9, wherein the IMR is arranged symmetrically in a first slot and a second slot of the subframe. ### Claim 11 A base station for supporting interference measurement in a wireless communication system using subframes including, or not including, Cell-specific Reference Signals (CRS), the base station comprising: a radio communication unit which transmits and receives subframes to and from a terminal; and a controller configured to control determining whether a terminal supports a New Carrier Type (NCT) subframe, allocating, when the terminal supports the NCT subframe, Interference Measurement Resources (IMR) to the terminal at Resource Elements (REs) where other signals are not mapped in the subframe, transmitting information on the allocated IMR to the terminal, and transmitting the subframe including the allocated IMR to the terminal. ### Claim 12 (depends on 11) The base station of claim 11, wherein the controller allocates the IMR at the REs where other signals are not mapped when the subframe does not include the CRS. ### Claim 13 (depends on 11) The base station of claim 11, wherein the controller allocates, when the subframe includes the CRS, the IMR at the REs where other signals including the CRS are not mapped. ### Claim 14 (depends on 11) The base station of claim 11, wherein the controller allocates, when the subframe includes new DeModulation Reference Signals (DMRS), the IMR at the REs where other signals including the new DMRS are not mapped. ### Claim 15 (depends on 14) The base station of claim 14, wherein the controller arranges the IMR symmetrically in a first slot and a second slot of the subframe. ### Claim 16 A terminal for measuring interference in a wireless communication system using subframes including, or not including, Cell-specific Reference Signals (CRS), the terminal comprising: a radio communication unit which transmits and receives subframes to and from a base station; a controller which controls determining whether a base station supports a New Carrier Type (NCT) subframe, receiving, when the base station supports the NCT subframe, information on Interference Measurement Resources (IMR) from the base station at Resource Elements (REs) where other signals are not mapped in the subframe, receiving the subframe including the allocated IMR from the base station, measuring interference using the IMR, and reporting a measurement report to the base station. ### Claim 17 (depends on 16) The terminal of claim 16, wherein the IMR is allocated at the REs where other signals are not mapped when the subframe does not include the CRS. ### Claim 18 (depends on 16) The terminal of claim 16, wherein the IMR is allocated, when the subframe includes the CRS, at the REs where other signals including the CRS are not mapped. ### Claim 19 (depends on 16) The terminal of claim 16, wherein the IMR is allocated, when the subframe includes new DeModulation Reference Signals (DMRS), at the REs where other signals including the new DMRS are not mapped. ### Claim 20 (depends on 19) The terminal of claim 19, the IMR is arranged symmetrically in a first slot and a second slot of the subframe.