# US 2016/0366704 A1 · Method and apparatus for transmitting uplink data having low latency 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 2016/0366704 A1 - Document ID: US20160366704A1 - Status: Published application - Kind: A1 - Application number: 15/122,331 - Filed: 2014-11-17 - Published: 2016-12-15 - Earliest claimed: 2014-02-28 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Eunjong LEE; Jaehoon CHUNG; Genebeck HAHN; Jinmin KIM; Kukheon CHOI; Kwangseok NOH - Web page: https://patentgrep.com/patent/US20160366704A1 ## CPC - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 74/006: {in the downlink, i.e. towards the terminal} - H04W 74/0836: with 2-step access - H04W 74/0838: using contention-free random access [CFRA] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present specification provides a method for transmitting uplink data (UL data) requiring a low latency in a wireless communication system. The method performed by a terminal comprises: receiving control information related to a contention-based PUSCH zone from a base station; and transmitting uplink data to the base station on the basis of the received control information. The contention-based PUSCH zone is a resource area where uplink data of the terminal can be transmitted without allocation of a UL grant from the base station. Further, in order to distinguish between kinds of specific procedures performed by the terminal, the control information includes procedure-distinguishing information allocated for each kind of the specific procedures. ## Claims ### Claim at position 1 1-14. (canceled) ### Claim 15 A method for transmitting UL data requiring low latency in a wireless communication system, the method performed by user equipment comprising steps of: receiving control information related to a contention-based PUSCH zone from a base station, and transmitting UL data to the base station based on the received control information, wherein the contention-based PUSCH zone comprises a resource region in which the UL data of the user equipment is able to be transmitted without an UL grant allocated by the base station, the control information comprises procedure determination information allocated to each type of specific procedure in order to determine the type of the specific procedure performed by the user equipment, and the procedure determination information comprises a PRACH preamble sequence set comprising a first PRACH preamble sequence used for an RACH procedure based on a contention-based PUSCH zone (CP zone) and a second PRACH preamble sequence used for a common RACH procedure not using a CP zone. ### Claim 16 (depends on 15) The method of claim 15, wherein the contention-based PUSCH zone comprises at least one contention PUSCH resource block (CPRB). ### Claim 17 (depends on 16) The method of claim 16, wherein the UL data is transmitted to the base station through the CPRB. ### Claim 18 (depends on 15) The method of claim 15, wherein: the UL data comprises a radio resource control (RRC) request message, the method further comprises a step of transmitting the first PRACH preamble sequence to the base station, the RRC request message and the first PRACH preamble sequence are transmitted simultaneously or consecutively, and the RRC request message is transmitted through the contention-based PUSCH zone. ### Claim 19 (depends on 15) The method of claim 15, further comprising a step of receiving a PRACH preamble sequence allocated by the base station, wherein: the control information is transmitted through the step of receiving the PRACH preamble sequence allocated by the base station, the UL data comprises a radio resource control (RRC) request message, and the RRC request message is transmitted through the contention-based PUSCH zone. ### Claim 20 (depends on 15) The method of claim 15, wherein the control information comprises at least one of CP zone resource region information indicative of a resource region which belongs to an UL resource region and to which the CP zone has been allocated and CPRB-related information indicative of information about a total number of CPRBs and available CPRBs within the CP zone. ### Claim 21 (depends on 17) The method of claim 17, wherein the CPRB is selected randomly, based on a PRACH preamble, or based on a user equipment identifier (ID). ### Claim 22 (depends on 15) The method of claim 15, wherein: the UL data comprises a buffer status report (BSR) message, and the BSR message is transmitted through the contention-based PUSCH zone. ### Claim 23 (depends on 22) The method of claim 22, further comprising a step of transmitting actual data to the base station, wherein the actual data is transmitted through the contention-based PUSCH zone along with the BSR message. ### Claim 24 (depends on 18) The method of claim 18, wherein: the control information comprises at least one of CPRB-user equipment mapping information indicative of user equipment mapped to each CPRB and service type information indicative of services in which the CP zone is able to be used, and the UL data is transmitted if the user equipment is user equipment capable of using the contention-based PUSCH zone or if the UL data to be transmitted to the base station is related to a service in which the contention-based PUSCH zone is able to be used. ### Claim 25 (depends on 15) The method of claim 15, wherein the control information is transmitted through any one of a system information block (SIB), a master information block (MIB), and a control message. ### Claim 26 (depends on 15) The method of claim 15, further comprising a step of performing an initial access procedure along with the base station, wherein the control information is transmitted by the base station if the user equipment is user equipment requiring low latency through the initial access procedure. ### Claim 27 User equipment transmitting UL data requiring low latency in a wireless communication system, comprising: a communication unit for communicating with an outside in a wired or wireless manner; and a processor operatively connected to the communication unit, wherein the processor controls the communication unit so that the communication unit receives control information related to a contention-based PUSCH zone from a base station and controls the communication unit so that the communication unit transmits UL data to the base station based on the received control information, the contention-based PUSCH zone comprises a resource region in which the UL data of the user equipment is able to be transmitted without an UL grant allocated by the base station, the control information comprises procedure determination information allocated to each type of specific procedure in order to determine the type of the specific procedure performed by the user equipment, and the procedure determination information comprises a PRACH preamble sequence set comprising a first PRACH preamble sequence used for an RACH procedure based on a contention-based PUSCH zone (CP zone) and a second PRACH preamble sequence used for a common RACH procedure not using a CP zone. ### Claim 28 (depends on 22) The method of claim 22, wherein: the control information comprises at least one of CPRB-user equipment mapping information indicative of user equipment mapped to each CPRB and service type information indicative of services in which the CP zone is able to be used, and the UL data is transmitted if the user equipment is user equipment capable of using the contention-based PUSCH zone or if the UL data to be transmitted to the base station is related to a service in which the contention-based PUSCH zone is able to be used.