# US 9,438,334 B2 · 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 9,438,334 B2 - Document ID: US9438334B2 - Status: Granted - Kind: B2 - Application number: 13/528,063 - Filed: 2012-06-20 - Published: 2012-12-20 - Granted: 2016-09-06 - Earliest claimed: 2011-06-20 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Hyoungju Ji; Younsun Kim; Youngbum Kim; Joonyoung Cho; Seunghoon Choi - Inventors: Hyoungju Ji; Younsun Kim; Youngbum Kim; Joonyoung Cho; Seunghoon Choi - Web page: https://patentgrep.com/patent/US9438334B2 ## 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 of transmitting time division duplex (TDD) configuration information for a base station in a wireless communication system, the method comprising: identifying a radio network temporary identifier (RNTI) for the TDD configuration information; generating downlink control information (DCI) comprising the TDD configuration information, the TDD configuration information indicating a radio frame structure including a downlink subframe, an uplink subframe, and a special subframe; attaching a cyclic redundancy check (CRC) sequence scrambled with the RNTI to the DCI; and transmitting a control signal generated based on the DCI on a common control channel. ### Claim 2 (depends on 1) The method of claim 1, wherein the TDD configuration information comprises 3 bits information to indicate one of a plurality of uplink/downlink (UL/DL) configurations. ### Claim 3 (depends on 1) The method of claim 1, wherein a size of the DCI is equal to a size of DCI format 1C. ### Claim 4 (depends on 1) The method of claim 1, wherein the generating the DCI further comprises: multiplexing a plurality of TDD configuration indicators into one DCI for indicating individual TDD configuration information of multiple carriers. ### Claim 5 (depends on 1) The method of claim 1, further comprising: generating configuration information comprising subframe information for a user equipment to monitor the DCI; and transmitting the configuration information to the user equipment, wherein the subframe information comprises at least one of timing of the subframe, index of the subframe, transmitting period and offset. ### Claim 6 (depends on 5) The method of claim 5, wherein the subframe information indicates at least one subframe to decode the DCI for receiving the TDD configuration information. ### Claim 7 A method of receiving time division duplex (TDD) configuration information for a user equipment in a wireless communication system, the method comprising: identifying a radio network temporary identifier (RNTI) for the TDD configuration information; receiving a message including downlink control information (DCI) and a cyclic redundancy check (CRC) sequence scrambled with the RNTI, the DCI comprising the TDD configuration information, the TDD configuration information indicating a radio frame structure including a downlink subframe, an uplink subframe, and a special subframe on a common control channel; identifying the TDD configuration information; and transmitting a data or receiving a data according to the TDD configuration information. ### Claim 8 (depends on 7) The method of claim 7, further comprising: conducting blind decoding of the common control channel with the RNTI for the DCI for the TDD configuration information. ### Claim 9 (depends on 7) The method of claim 7, wherein the TDD configuration information comprises 3 bits information to indicate one of one of a plurality of uplink/downlink (UL/DL) configurations. ### Claim 10 (depends on 7) The method of claim 7, wherein a size of the DCI is equal to a size of DCI format 1C. ### Claim 11 (depends on 7) The method of claim 7, wherein the DCI comprises a plurality of TDD configuration indicators for indicating individual TDD configuration information of multiple carriers. ### Claim 12 (depends on 7) The method of claim 7, further comprising: receiving configuration information comprising subframe information to monitor the DCI, wherein the subframe information comprises at least one of timing of the subframe, index of the subframe, transmitting period and offset. ### Claim 13 (depends on 12) The method of claim 12, wherein the subframe information indicates at least one subframe to decode the DCI for receiving the TDD configuration information. ### Claim 14 A base station for transmitting time division duplex (TDD) configuration information in a wireless communication system, the base station comprising: a radio frequency unit configured to transmit or receive a signal; and a controller configured to: identify a radio network temporary identifier (RNTI) for the TDD configuration information, generate downlink control information (DCI) comprising the TDD configuration information, the TDD configuration information indicating a radio frame structure including a downlink subframe, an uplink subframe, and a special subframe, attach a cyclic redundancy check (CRC) sequence scrambled with the RNTI to the DCI, and transmit a control signal generated based on the DCI. ### Claim 15 (depends on 14) The base station of claim 14, wherein the TDD configuration information comprises 3 bits information to indicate one of a plurality of uplink/downlink (UL/DL) configurations. ### Claim 16 (depends on 14) The base station of claim 14, wherein a size of the DCI is equal to a size of DCI format 1C. ### Claim 17 (depends on 14) The base station of claim 14, wherein the controller is configured to multiplex a plurality of TDD configuration indicators into one DCI for indicating individual TDD configuration information of multiple carriers. ### Claim 18 (depends on 14) The base station of claim 14, wherein the controller is further configured to generate configuration information comprising subframe information for a user equipment to monitor the DCI and to transmit the configuration information to the user equipment, and wherein the subframe information comprises at least one of timing of the subframe, index of the subframe, transmitting period and offset. ### Claim 19 (depends on 18) The base station of claim 18, wherein the subframe information indicates at least one subframe to decode the DCI for receiving the TDD configuration information. ### Claim 20 A user equipment for transmitting time division duplex (TDD) configuration information in a wireless communication system, the user equipment comprising: a radio frequency unit configured to transmit or receive a signal; and a controller configured to: identify a radio network temporary identifier (RNTI) for the TDD configuration information, receive a message including downlink control information (DCI) and a cyclic redundancy check (CRC) sequence scrambled with the RNTI, the DCI comprising the TDD configuration information, the TDD configuration information indicating a radio frame structure including a downlink subframe, an uplink subframe, and a special subframe on a common control channel, identify the TDD configuration information, and transmit or receive data according to the TDD configuration information. ### Claim 21 (depends on 20) The user equipment of claim 20, wherein the controller is further configured to conduct blind decoding of the common control channel with the RNTI for the DCI for the TDD configuration information. ### Claim 22 (depends on 20) The user equipment of claim 20, wherein the TDD configuration information comprises 3 bits information to indicate one of a plurality of uplink/downlink (UL/DL) configurations. ### Claim 23 (depends on 20) The user equipment of claim 20, wherein a size of the DCI is equal to a size of DCI format 1C. ### Claim 24 (depends on 20) The user equipment of claim 20, wherein the DCI comprises multiple TDD configuration indicators for indicating individual TDD configuration information of multiple carriers. ### Claim 25 (depends on 20) The user equipment of claim 20, wherein the controller is further configured to receive configuration information comprising subframe information to monitor the DCI, and wherein the subframe information comprises at least one of timing of the subframe, index of the subframe, transmitting period and offset. ### Claim 26 (depends on 25) The user equipment of claim 25, wherein the subframe information indicates at least one subframe to decode the DCI for receiving the TDD configuration information.