# US 11,452,084 B2 · Method and apparatus for effectively providing TDD configuration information to user equipment and determining uplink transmission timing in mobile communication system supporting TDD > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,084 B2 - Document ID: US11452084B2 - Status: Granted - Kind: B2 - Application number: 16/835,048 - Filed: 2020-03-30 - Published: 2020-07-16 - Granted: 2022-09-20 - Earliest claimed: 2013-01-21 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Sangbum Kim; Soenghun Kim; Kyeongin Jeong - Web page: https://patentgrep.com/patent/US11452084B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/2656: {for structure of frame, burst} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L 5/1438: {Negotiation of transmission parameters prior to communication (modified according to link quality H04L1/0001)} - H04L 5/1469: {using time-sharing} - H04L 7/0037: {Delay of clock signal} - H04L 7/0041: {Delay of data signal} - H04L 7/0337: {Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/12: Wireless traffic scheduling - H04W 72/1268: of uplink data flows - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0078: {Timing of allocation} - H04L 5/0092: {Indication of how the channel is divided} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method for configuring a time division duplex (TDD) of a user equipment in a communication system, according to one embodiment of the present invention, comprises the steps of: receiving from a base station a first TDD configuration; receiving from the base station a message including information related to a dynamic TDD configuration; receiving a second TDD configuration according to the received information related to the dynamic TDD configuration; receiving from the base station an uplink grant; and determining whether to apply the first TDD configuration or the second TDD configuration based on a method by which the unlink grant is received. According to one embodiment of the present invention, the advantages of configuring a shorter cycle of the TDD to the user equipment supporting the TDD in a wireless communication system, and rapidly configuring the TDD to the user equipment variably according to a communication situation are provided. ## Claims ### Claim 1 A method performed by a terminal in a communication system, the method comprising: receiving, from a base station, a system information block message including information on a first time division duplex (TDD) uplink/downlink (UL/DL) configuration; receiving, from the base station, on a physical downlink control channel (PDCCH), information associated with a second TDD UL/DL configuration; receiving, from the base station, uplink scheduling information for the terminal after the information on the first TDD UL/DL configuration and the information associated with the second TDD UL/DL configuration are received; transmitting, if the uplink scheduling information is received in a random access response message, a message to the base station based on the uplink scheduling information and the first TDD UL/DL configuration; and transmitting, if the uplink scheduling information is received on the PDCCH, a message to the base station based on the uplink scheduling information and the second TDD UL/DL configuration. ### Claim 2 (depends on 1) The method of claim 1, wherein the transmitting the message corresponding to the uplink scheduling information to the base station based on the first TDD UL/DL configuration further comprises: transmitting, if the uplink scheduling information is received in the random access response message on subframe n, the message to the base station based on the uplink scheduling information and the first TDD UL/DL configuration on a subframe n+k. ### Claim 3 (depends on 1) The method of claim 1, wherein the random access response message is received based on a first identifier. ### Claim 4 (depends on 3) The method of claim 3, wherein the first identifier is a random access-radio network temporary identifier (RA-RNTI). ### Claim 5 (depends on 1) The method of claim 1, wherein the message is not transmitted in a subframe, which is changed from a uplink subframe determined based on the information on the first TDD UL/DL configuration to a downlink subframe determined based on the information associated with the second TDD UL/DL configuration. ### Claim 6 A method performed by a base station in a communication system, the method comprising: transmitting, to a terminal, a system information block message including information on a first time division duplex (TDD) uplink/downlink (UL/DL) configuration; transmitting, to the terminal, on a physical downlink control channel (PDCCH), information associated with a second TDD UL/DL configuration; transmitting, to the terminal, uplink scheduling information for the terminal after the information on the first TDD UL/DL configuration and the information associated with the second TDD UL/DL configuration are transmitted; receiving, if the uplink scheduling information is transmitted in a random access response message, a message from the terminal based on the uplink scheduling information and the first TDD UL/DL configuration; and receiving, if the uplink scheduling information is transmitted on the PDCCH, a message from the terminal based on the uplink scheduling information and the second TDD UL/DL configuration. ### Claim 7 (depends on 6) The method of claim 6, wherein the receiving the message corresponding to the uplink scheduling information from the terminal based on the first TDD UL/DL configuration further comprises: receiving, if the uplink scheduling information is received in the random access response message on subframe n, the message from the terminal based on the uplink scheduling information and the first TDD UL/DL configuration on a subframe n+k. ### Claim 8 (depends on 6) The method of claim 6, wherein the random access response message is received based on a first identifier. ### Claim 9 (depends on 8) The method of claim 8, wherein the first identifier is a random access-radio network temporary identifier (RA-RNTI). ### Claim 10 (depends on 6) The method of claim 6, wherein the message is not received in a subframe, which is changed from a uplink subframe determined based on the information on the first TDD UL/DL configuration to a downlink subframe determined based on the information associated with the second TDD UL/DL configuration. ### Claim 11 A terminal in a communication system, the terminal comprising: a transceiver; and a controller configured to: control the transceiver to receive, from a base station, a system information block message including information on a first time division duplex (TDD) uplink/downlink (UL/DL) configuration, receive, from the base station, on a physical downlink control channel (PDCCH), information associated with a second TDD UL/DL configuration, receive, from the base station, uplink scheduling information for the terminal after the information on the first TDD UL/DL configuration and the information associated with the second TDD UL/DL configuration are received, transmit, if the uplink scheduling information is received in a random access response message, a message to the base station based on the uplink scheduling information and the first TDD UL/DL configuration, and transmit, if the uplink scheduling information is received on the PDCCH, a message to the base station based on the uplink scheduling information and the second TDD UL/DL configuration. ### Claim 12 (depends on 11) The terminal of claim 11, wherein the controller is further configured to: control the transceiver to transmit, if the uplink scheduling information is received in the random access response message on subframe n, the message to the base station based on the uplink scheduling information and the first TDD UL/DL configuration on a subframe n+k. ### Claim 13 (depends on 11) The terminal of claim 11, wherein the random access response message is received based on a first identifier. ### Claim 14 (depends on 13) The terminal of claim 13, wherein the first identifier is a random access-radio network temporary identifier (RA-RNTI). ### Claim 15 (depends on 11) The terminal of claim 11, wherein the message is not transmitted in a subframe, which is changed from a uplink subframe determined based on the information on the first TDD UL/DL configuration to a downlink subframe determined based on the information associated with the second TDD UL/DL configuration. ### Claim 16 A base station in a communication system, the base station comprising: a transceiver; and a controller configured to: control the transceiver to transmit, to a terminal, a system information block message including information on a first time division duplex (TDD) uplink/downlink (UL/DL) configuration, transmit, to the terminal, on a physical downlink control channel (PDCCH), information associated with a second TDD UL/DL configuration, transmit, to the terminal, uplink scheduling information for the terminal after the information on the first TDD UL/DL configuration and the information associated with the second TDD UL/DL configuration are transmitted, receive, if the uplink scheduling information is transmitted in a random access response message, a message from the terminal based on the uplink scheduling information and the first TDD UL/DL configuration, and receive, if the uplink scheduling information is transmitted on the PDCCH, a message from the terminal based on the uplink scheduling information and the second TDD UL/DL configuration. ### Claim 17 (depends on 16) The base station of claim 16, wherein the controller is further configured to control the transceiver to receive, if the uplink scheduling information is received in the random access response message on subframe n, the message from the terminal based on the uplink scheduling information and the first TDD UL/DL configuration on a subframe n+k. ### Claim 18 (depends on 16) The base station of claim 16, wherein the random access response message is received based on a first identifier. ### Claim 19 (depends on 18) The base station of claim 18, wherein the first identifier is a random access-radio network temporary identifier (RA-RNTI). ### Claim 20 (depends on 16) The base station of claim 16, wherein the message is not received in a subframe, which is changed from a uplink subframe determined based on the information on the first TDD UL/DL configuration to a downlink subframe determined based on the information associated with the second TDD UL/DL configuration.