# US 10,455,600 B2 · Method for transmitting and receiving data in wireless communication system and apparatus for the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,600 B2 - Document ID: US10455600B2 - Status: Granted - Kind: B2 - Application number: 15/563,781 - Filed: 2015-12-02 - Published: 2018-04-05 - Granted: 2019-10-22 - Earliest claimed: 2015-04-08 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Eunjong Lee; Heejeong Cho; Genebeck Hahn; Ilmu Byun - Web page: https://patentgrep.com/patent/US10455600B2 ## CPC - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 27/2602: {Signal structure} - H04W 72/12: Wireless traffic scheduling - H04W 72/1273: of downlink data flows - H04W 72/20: Control channels or signalling for resource management - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 27/2603: {Signal structure ensuring backward compatibility with legacy system} - H04L 27/26035: {Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences (using different training sequence per antenna H04B7/0684; code allocation H04J13/16)} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract In a method for transmitting data in a wireless communication system supporting a low latency service according to the present invention, a method performed by a first UE comprises transmitting to an eNB an urgent signal (US) for informing of occurrence of an event related to an urgent situation; receiving from the eNB a response to the urgent signal through two PHICH (Physical HARQ Indication Channel) resources; and transmitting to the eNB urgent data including detailed information related to the occurred event on the basis of the received response, wherein each PHICH resource is determined by a Physical Resource Block (PRB) index of the resource to which the urgent signal is transmitted. ## Claims ### Claim 1 A method for transmitting and receiving data in a wireless communication system, the method performed by a user equipment (UE) and comprising: transmitting and receiving the data with an evolved Node B (eNB) through a radio frame, wherein the radio frame includes a downlink (DL) radio frame and an uplink (UL) radio frame, wherein the radio frame includes a legacy transmission time interval (TTI) and a short TTI, wherein the legacy TTI includes two slots, wherein each slot included in the legacy TTI includes a first short TTI and a second short TTI, wherein the first short TTI and the second short TTI include a control region to which a control channel is allocated and a data region to which a data channel is allocated, wherein downlink control information (DCI) related to uplink transmission of the first short TTI and the second short TTI is allocated to a control region of the first short TTI belonging to the downlink radio frame, and wherein, when a highest physical resource block (PRB) index of the first short TTI is allocated as highest PRB index of a frequency band configured for the UE, a lowest PRB index of the second short TTI is allocated consecutively to the highest PRB index of the first short TTI. ### Claim 2 (depends on 1) The method of claim 1, wherein the first short TTI comprises four symbols, and the second shot TTI comprises three symbols. ### Claim 3 (depends on 2) The method of claim 2, wherein the control region of the first short TTI comprises one symbol or two symbols, and a control region of the second short TTI comprises one symbol. ### Claim 4 (depends on 1) The method of claim 1, further comprising transmitting a demodulation reference signal (DMRS) to the eNB through a short TTI of the radio frame. ### Claim 5 (depends on 4) The method of claim 4, wherein the DMRS is transmitted through one symbol within a data region of the first short TTI and the second short TTI. ### Claim 6 (depends on 4) The method of claim 4, wherein the DMRS is transmitted through two symbols within the control region of the first short TTI and is transmitted through one symbol within the control region of the second short TTI. ### Claim 7 (depends on 4) The method of claim 4, wherein the DMRS is transmitted through an overlapping region if the first short TTI overlaps a specific symbol of the second short TTI. ### Claim 8 (depends on 1) The method of claim 1, further comprising: receiving, from the eNB, a DCI format including a UL grant through the control region of the first TTI belonging to the downlink radio frame. ### Claim 9 (depends on 8) The method of claim 8, wherein the DCI format further comprises an indicator indicating whether the uplink grant is related to resource allocation for the first short TTI or the second short TTI. ### Claim 10 (depends on 9) The method of claim 9, wherein the indicator is a subframe offset identifying the first short TTI or the second short TTI. ### Claim 11 (depends on 8) The method of claim 8, wherein the DCI format further comprises a resource block assignment field including a resource indication value (RIV), wherein the RIV for the first short TTI is RIV=NRBDL(LCRBs−1)+RBstart when (LCRBs−1)≤└NRBUL/2┘ and RIV=NRBDL(NRBDL−LCRBs+1)+(NRBDL−1−RBstart), otherwise while the RIV for the second short TTI is RIV = N RB UL ⁡ ( ⌊ N RB UL 2 ⌋ + 1 ) + N RB DL ⁡ ( L CRBs - 1 ) + RB start when (LCRBs−1)≤└NRBUL/2┘ and RIV = N RB UL ⁡ ( ⌊ N RB UL 2 ⌋ + 1 ) + N RB DL ⁡ ( N RB DL - L CRBs + 1 ) + ( N RB DL - 1 - RB start ) , otherwise. ### Claim 12 (depends on 1) The method of claim 1, further comprising: determining in which way to transmit the data between a contention-based method and a scheduling-based method. ### Claim 13 (depends on 12) The method of claim 12, wherein the data is transmitted to the eNB through contention resources when the data is transmitted by the contention-based method. ### Claim 14 (depends on 13) The method of claim 13, wherein the contention resources is included in the second short TTI. ### Claim 15 (depends on 1) The method of claim 1, further comprising: receiving a response to the data transmission from the eNB through a physical hybrid automatic repeat request (HARQ) indicator channel (PHICH). ### Claim 16 (depends on 15) The method of claim 15, wherein the response is a response to at least one of the first short TTI and the second short TTI. ### Claim 17 (depends on 16) The method of claim 16, wherein a response to each of the first short TTI and the second short TTI is mapped to a resource of the PHICH in the form of an index pair of (nPHICHgroup, nPHICHseq). ### Claim 18 (depends on 17) The method of claim 17, wherein an IPRB_RA value with respect to the first short TTI is equal to IPRB_RAlowest_index or IPRB_RAlowest_index+1, and an IPRB_RA value with respect to the second short TTI is equal to IPRB_RAlowest_index+NRBUL or IPRB_RAlowest_index+NRBUL+1. ### Claim 19 (depends on 1) The method of claim 1, further comprising: transmitting an urgent signal for requesting urgent resource allocation to the eNB; receiving the requested urgent resource from the eNB through a physical hybrid automatic repeat request(HARQ) indicator channel (PHICH) channel; and transmitting the data to the eNB using the urgent resource received through the PHICH. ### Claim 20 A user equipment (UE) for transmitting and receiving data in a wireless communication system, the UE comprising: a transceiver configured to transmit and receive a radio signal; and a processor operably connected to the transceiver, wherein the processor is configured to transmit and receive the data with an evolved Node B (eNB) through a radio frame, wherein the radio frame includes a downlink (DL) radio frame and an uplink (UL) radio frame, wherein the radio frame includes a legacy transmission time interval (TTI) and a short TTI, wherein the legacy TTI includes two slots, wherein each slot included in the legacy TTI includes a first short TTI and a second short TTI, wherein the first short TTI and the second short TTI include a control region to which a control channel is allocated and a data region to which a data channel is allocated, wherein downlink control information (DCI) related to uplink transmission of the first short TTI and the second short TTI is allocated to a control region of the first short TTI belonging to the downlink radio frame, and wherein, when a highest physical resource block (PRB) index of the first short TTI is allocated as highest PRB index of a frequency band configured for the UE, a lowest PRB index of the second short TTI is allocated consecutively to the highest PRB index of the first short TTI.