# US 2018/0026774 A1 · Method for transmitting and receiving signal on basis of dynamic change in wireless resource in wireless communication system to which carrier aggregation scheme is applied, and device therefore > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0026774 A1 - Document ID: US20180026774A1 - Status: Published application - Kind: A1 - Application number: 15/714,972 - Filed: 2017-09-25 - Published: 2018-01-25 - Earliest claimed: 2012-03-20 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Myoungseob KIM; Hanbyul SEO; Hakseong KIM; Seungmin LEE - Web page: https://patentgrep.com/patent/US20180026774A1 ## CPC - H04L 5/1438: {Negotiation of transmission parameters prior to communication (modified according to link quality H04L1/0001)} - H04B 7/2656: {for structure of frame, burst} - H04J 3/10: Arrangements for reducing cross-talk between channels - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/1469: {using time-sharing} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04J 11/0023: {Interference mitigation or co-ordination (direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541)} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0066: {Requirements on out-of-channel emissions} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for transmitting and receiving a signal by a terminal in a wireless communication system is disclosed in the present invention. More particularly, the method comprises the steps of: receiving an indicator for changing the usage of a specific subframe corresponding to a sub-component carrier from a network; determining whether near-end crosstalk between the sub-component carrier and another component carrier occurs if the usage of the subframe is changed according to the indicator; and transmitting and receiving a signal to and from the network through the sub-component carrier according to the changed usage if it is determined that the near-end crosstalk does not occur. ## Claims ### Claim 1 (canceled) ### Claim 2 A method for communicating with a base station at a user equipment (UE) in a Time Division Duplex (TDD) communication system, the method comprising: configuring subframe configuration according to a first subframe configuration defining subframe usages for each of subframes included in one radio frame, wherein a first subframe included in one radio frame is set as an uplink subframe based on the first subframe configuration, and wherein a sounding reference signal (SRS) is allocated in the first subframe based on the first subframe configuration; and re-configuring the subframe configuration from the first subframe configuration to a second subframe configuration, wherein the first subframe included in one radio frame is changed to a downlink subframe from the uplink subframe based on the re-configured second subframe configuration, and wherein the allocated SRS in the first subframe is dropped and a position corresponding to the dropped SRS in the first subframe is used for downlink when the first subframe is changed to the downlink subframe from the uplink subframe. ### Claim 3 (depends on 2) The method of claim 2, wherein information on the first subframe configuration is received via a system information message from the base station. ### Claim 4 (depends on 2) The method of claim 2, wherein the number of downlink subframes indicated by the second subframe configuration are greater than a number of downlink subframes indicated by the first subframe configuration. ### Claim 5 (depends on 2) The method of claim 2, wherein the subframe usages comprise the downlink subframe, the uplink subframe and a special subframe. ### Claim 6 (depends on 2) The method of claim 2, wherein the uplink subframe and the changed downlink subframe are included in a secondary serving cell. ### Claim 7 (depends on 6) The method of claim 6, wherein a physical downlink shared channel in the downlink subframe of the secondary serving cell is scheduled in a primary serving cell. ### Claim 8 A user equipment (UE) in a Time Division Duplex (TDD) communication system, the user equipment comprising: a radio frequency module for transmitting and receiving signals with a base station; and a processor for processing the signals, wherein the processor is configured to: set subframe configuration according to a first subframe configuration defining subframe usages for each of subframes included in one radio frame, wherein a first subframe included in one radio frame is set as an uplink subframe based on the first subframe configuration, and wherein a sounding reference signal (SRS) is allocated in the first subframe based on the first subframe configuration, and re-set the subframe configuration from the first subframe configuration to a second subframe configuration, wherein the first subframe included in one radio frame is changed to a downlink subframe from the uplink subframe based on the re-set second subframe configuration, and wherein the allocated SRS in the first subframe is dropped and a position corresponding to the dropped SRS in the first subframe is used for downlink when the first subframe is changed to the downlink subframe from the uplink subframe. ### Claim 9 (depends on 8) The UE of claim 8, wherein information on the first subframe configuration is received via a system information message from the base station. ### Claim 10 (depends on 8) The UE of claim 8, wherein the number of downlink subframes indicated by the second subframe configuration are greater than a number of downlink subframes indicated by the first subframe configuration. ### Claim 11 (depends on 8) The UE of claim 8, wherein the subframe usages comprise the downlink subframe, the uplink subframe and a special subframe. ### Claim 12 (depends on 8) The UE of claim 8, wherein the uplink subframe and the changed downlink subframe are included in a secondary serving cell. ### Claim 13 (depends on 12) The UE of claim 12, wherein a physical downlink shared channel in the downlink subframe of the secondary serving cell is scheduled in a primary serving cell.