# US 2018/0324016 A1 · Method and apparatus for transmitting and receiving time division duplex frame configuration information in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0324016 A1 - Document ID: US20180324016A1 - Status: Published application - Kind: A1 - Application number: 16/033,792 - Filed: 2018-07-12 - Published: 2018-11-08 - Earliest claimed: 2011-06-20 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hyoungju JI; Younsun KIM; Youngbum KIM; Joonyoung CHO; Seunghoon CHOI - Web page: https://patentgrep.com/patent/US20180324016A1 ## CPC - H04B 7/2656: {for structure of frame, burst} - H04L 1/0061: {Error detection codes} - H04L 5/1469: {using time-sharing} - H04L 27/2602: {Signal structure} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 and an apparatus for transmitting and receiving Time Division Duplex (TDD) frame configuration information are disclosed. The base station transmits TDD frame configuration information as system information to a user equipment through a common control channel so as to dynamically change the TDD frame configuration according to uplink and downlink traffic conditions. The base station may deliver the same system information to all user equipments in the cell, removing ambiguity in User Equipment (UE) operations and avoiding interference. In comparison to an existing method of delivering TDD frame configuration information through system information update, the disclosed method enables user equipments to rapidly cope with traffic changes. In addition, user equipments may receive and apply TDD frame configuration information at the same time. ## Claims ### Claim 1 A method by a base station, the method comprising: identifying a radio network temporary identifier (RNTI) for uplink-downlink configuration information; obtaining downlink control information (DCI) including the uplink-downlink configuration information associated with an uplink timing and a downlink timing; attaching a cyclic redundancy check (CRC) sequence scrambled with the RNTI to the DCI; and transmitting the DCI to which the CRC sequence is attached on a control channel. ### Claim 2 (depends on 1) The method of claim 1, wherein the uplink-downlink configuration information is transmitted through a common control channel. ### Claim 3 (depends on 1) The method of claim 1, a size of the DCI corresponds to a size of DCI on a common control channel. ### Claim 4 (depends on 1) The method of claim 1, further comprising: transmitting a period related to a timing for monitoring the DCI. ### Claim 5 (depends on 1) The method of claim 1, wherein the uplink-downlink configuration information indicates a format index for a configuration of the uplink timing and the downlink timing. ### Claim 6 A base station comprising: a transceiver; and a controller coupled with the transceiver and configured to: identify a radio network temporary identifier (RNTI) for uplink-downlink configuration information, obtain downlink control information (DCI) including the uplink-downlink configuration information associated with an uplink timing and a downlink timing, attach a cyclic redundancy check (CRC) sequence scrambled with the RNTI to the DCI, and transmit the DCI to which the CRC sequence is attached on a control channel. ### Claim 7 (depends on 6) The base station of claim 6, wherein the uplink-downlink configuration information is transmitted through a common control channel. ### Claim 8 (depends on 6) The base station of claim 6, a size of the DCI corresponds to a size of DCI on a common control channel. ### Claim 9 (depends on 6) The base station of claim 6, wherein the controller is further configured to transmit a period related to a timing for monitoring the DCI. ### Claim 10 (depends on 6) The base station of claim 6, wherein the uplink-downlink configuration information indicates a format index for a configuration of the uplink timing and the downlink timing. ### Claim 11 A method by a terminal, the method comprising: identifying a radio network temporary identifier (RNTI) for uplink-downlink configuration information; receiving downlink control information (DCI) to which a cyclic redundancy check (CRC) sequence scrambled with the RNTI is attached, the DCI including the uplink-downlink configuration information associated with an uplink timing and a downlink timing; and identifying the uplink-downlink configuration information based on the DCI. ### Claim 12 (depends on 11) The method of claim 11, wherein the uplink-downlink configuration information is received through a common control channel. ### Claim 13 (depends on 11) The method of claim 11, a size of the DCI corresponds to a size of DCI on a common control channel. ### Claim 14 (depends on 11) The method of claim 11, further comprising: receiving a period related to a timing for monitoring the DCI. ### Claim 15 (depends on 11) The method of claim 11, wherein the uplink-downlink configuration information indicates a format index for a configuration of the uplink timing and the downlink timing. ### Claim 16 A terminal comprising: a transceiver; and a controller coupled with the transceiver and configured to: identify a radio network temporary identifier (RNTI) for uplink-downlink configuration information, receive downlink control information (DCI) to which a cyclic redundancy check (CRC) sequence scrambled with the RNTI is attached, the DCI including the uplink-downlink configuration information associated with an uplink timing and a downlink timing, and identify the uplink-downlink configuration information based on the DCI. ### Claim 17 (depends on 16) The terminal of claim 16, wherein the uplink-downlink configuration information is received through a common control channel. ### Claim 18 (depends on 16) The terminal of claim 16, a size of the DCI corresponds to a size of DCI on a common control channel. ### Claim 19 (depends on 16) The terminal of claim 16, further comprising: receiving a period related to a timing for monitoring the DCI. ### Claim 20 (depends on 16) The terminal of claim 16, wherein the uplink-downlink configuration information indicates a format index for a configuration of the uplink timing and the downlink timing.