Method for transmitting random access channel (RACH) signal in wireless communication system, and terminal therefor
地域：
Seoul
摘要
A method by which a terminal transmits a random access channel (RACH) signal in a wireless communication system comprises the step of transmitting the RACH signal to a base station according to an RACH format corresponding to a specific RACH subframe among previously defined RACH formats, wherein the method is configured such that a start point or an end point of the RACH signal in a time domain is differentiated according to whether a downlink control zone and an uplink control zone within the RACH subframe are punctured in a specific frequency band between the previously defined RACH formats.
說明書
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This application is the National Stage filing under 35 U.S.C. 371 of International Application No. PCT/KR2017/002383, filed on Mar. 6, 2017, which claims the benefit of U.S. Provisional Application No. 62/303,395, filed on Mar. 4, 2016 and 62/308,836, filed on Mar. 15, 2016, the contents of which are all hereby incorporated by reference herein in their entireties.
The present invention relates to wireless communication, and more particularly, to a method of transmitting a random access channel (RACH) signal in a wireless communication system and a user equipment (UE) therefor.
3GPP LTE (3rd Generation Partnership Project Long Term Evolution) system is designed with a frame structure having a TTI (transmission time interval) of 1 ms and data requirement latency time for a video application is 10 ms. Yet, with the advent of a new application such as real-time control and tactile internet, 5G technology in the future requires data transmission of lower latency and it is anticipated that 5G data requirement latency time is going to be lowered to 1 ms.
However, the legacy frame structure of 1 ms TTI is unable to satisfy the 1 ms data requirement latency. 5G aims to provide data latency reduced as much as 10 times compared to the legacy data latency.
Although 5G communication system requires a new frame structure to solve the abovementioned problem, the new frame structure has not been proposed yet.
權(quán)利要求
What is claimed is:1. A method for transmitting a random access channel (RACH) signal by a user equipment in a wireless communication system, the method comprising:transmitting the RACH signal to a base station based on a RACH format related to a specific RACH subframe in predefined RACH formats, wherein each of the predefined RACH formats is configured to distinguish a starting point or an ending point of the RACH signal, wherein the starting point or the ending point of the RACH signal is configured based on whether a downlink control zone and an uplink control zone are punctured on a specific frequency band in the specific RACH subframe. 2. The method of claim 1 , further comprising:receiving information on the predefined RACH formats from the base station. 3. The method of claim 1 , wherein the RACH format related to the specific RACH subframe corresponds to a format that the downlink control zone and the uplink control zone are not punctured on the specific frequency band in the specific RACH subframe and wherein the RACH signal is transmitted from a symbol appearing after the downlink control zone based on the RACH format. 4. The method of claim 1 , wherein the RACH format related to the specific RACH subframe relates to a format that the downlink control zone is punctured only on the specific frequency band in the downlink control zone and the uplink control zone in the specific RACH subframe and wherein the RACH signal is transmitted from a first symbol of the downlink control zone based on the RACH format. 5. The method of claim 1 , wherein the RACH format related to the specific RACH subframe corresponds to a format that the uplink control zone is punctured only on the specific frequency band in the downlink control zone and the uplink control zone in the specific RACH subframe and wherein the RACH signal is transmitted in symbol duration corresponding to the uplink control zone from a symbol appearing after the downlink control zone based on the RACH format. 6. The method of claim 1 , wherein the RACH format related to the specific RACH subframe relates to a format that both the downlink control zone and the uplink control zone are punctured on the specific frequency band in the specific RACH subframe and wherein the RACH signal is transmitted in duration ranging from a symbol appearing after the downlink control zone to a symbol before the uplink control zone based on the RACH format. 7. The method of claim 1 , wherein the specific frequency band relates to a center frequency of a prescribed number of resource blocks (RBs) and wherein the RACH signal is transmitted on the center frequency. 8. The method of claim 1 , further comprising:receiving, from the base station, at least one of allocation information of the specific RACH subframe for transmitting the RACH signal and information on the specific frequency band. 9. The method of claim 3 , wherein the RACH signal contains a CP (cyclic prefix) and a RACH sequence. 10. The method of claim 1 , wherein the user equipment relates to a user equipment performing initial access RACH. 11. A user equipment for transmitting a random access channel (RACH) signal in a wireless communication system, the user equipment comprising:a transmitter; and a processor, wherein the processor configured to control the transmitter to transmit the RACH signal to a base station based on a RACH format related to a specific RACH subframe in predefined RACH formats, wherein each of the predefined RACH formats is configured to distinguish a starting point or an ending point of the RACH signal, wherein the starting point or the ending point of the RACH signal is configured based on whether a downlink control zone and an uplink control zone are punctured on a specific frequency band in the specific RACH subframe. 12. The user equipment of claim 11 , further comprising a receiver,wherein the processor is configured to control the receiver to receive information on the predefined RACH formats from the base station. 13. The user equipment of claim 11 , wherein the RACH format related to the specific RACH subframe relates to a format that the downlink control zone and the uplink control zone are not punctured on the specific frequency band in the specific RACH subframe and wherein the processor is configured to control the transmitter to transmit the RACH signal from a symbol appearing after the downlink control zone based on the RACH format. 14. The user equipment of claim 11 , wherein the RACH format related to the specific RACH subframe relates to a format that the downlink control zone is punctured only on the specific frequency band in the downlink control zone and the uplink control zone in the specific RACH subframe and wherein the processor is configured to control the transmitter to transmit the RACH signal from a first symbol of the downlink control zone based on the RACH format. 15. The user equipment of claim 11 , wherein the RACH format related to the specific RACH subframe relates to a format that the uplink control zone is punctured only on the specific frequency band in the downlink control zone and the uplink control zone in the specific RACH subframe and wherein the processor is configured to control the transmitter to transmit the RACH signal in symbol duration corresponding to the uplink control zone from a symbol appearing after the downlink control zone based on the RACH format. 16. The user equipment of claim 11 , wherein the RACH format related to the specific RACH subframe relates to a format that both the downlink control zone and the uplink control zone are punctured on the specific frequency band in the specific RACH subframe and wherein the processor is configured to control the transmitter to transmit the RACH signal in duration ranging from a symbol appearing after the downlink control zone to a symbol before the uplink control zone based on the RACH format.
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