Method and user equipment for transmitting random access preamble, and method and base station for receiving random access preamble
AssigneeLG Electronics Inc.
InventorsSukhyon YOON, Hyunsoo KO, Kijun KIM, Eunsun KIM, Suckchel YANG
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Abstract
A UE transmits a random access channel (RACH) preamble and a BS receives the RACH channel. The BS configures the RACH preamble to align boundaries of the RACH preamble with boundaries of OFDM symbols on which the RACH preamble is configured in the time domain. The UE generates/transmits the RACH preamble to align the boundaries of the RACH preamble with the boundaries of OFDM symbols on which the RACH preamble is configured in the time domain.
Claims20
A method of transmitting a random access channel (RACH) preamble by a user equipment in a wireless communication system, the method comprising:
- generating the RACH preamble;
- and
- transmitting the RACH preamble using a RACH resource,
- wherein the RACH resource is comprised of a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein a length NRA of the RACH preamble is equal to a total length of the plurality of OFDM symbols,
- wherein the RACH preamble consists of a cyclic prefix (CP) part and a sequence part,
- wherein the sequence part includes n preambles, each preamble having a length Nu, and a length NSEQ of the sequence part is Nu*n, where n is a positive integer, and
- wherein a length NCP,RA of the CP part satisfies NCP,RA+NSEQ=NRA.
A method of receiving a random access channel (RACH) preamble by a base station in a wireless communication system, the method comprising:
- transmitting RACH preamble configuration information;
- and
- receiving the RACH preamble using a RACH resource based on the RACH preamble configuration information,
- wherein the RACH resource is comprised of a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein a length NRA of the RACH preamble is equal to a total length of the plurality of OFDM symbols, and
- wherein the RACH preamble consists of a cyclic prefix (CP) part and a sequence part,
- wherein the sequence part includes n preambles, each preamble having a length Nu, and a length NSEQ of the sequence part is Nu*n, where n is a positive integer, and
- wherein a length NCP,RA of the CP part satisfies NCP,RA+NSEQ=NRA.
A user equipment for transmitting a random access channel (RACH) preamble in a wireless communication system, the user equipment comprising,
- a radio frequency (RF) unit, and
- a processor configured to control the RF unit,
- wherein the processor is configured to:
- generate the RACH preamble;
- and
- control the RF unit to transmit the RACH preamble using a RACH resource,
- wherein the RACH resource is comprised of a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein a length NRA of the RACH preamble is equal to a total length of the plurality of OFDM symbols,
- wherein the RACH preamble consists of a cyclic prefix (CP) part and a sequence part,
- wherein the sequence part includes n preambles, each preamble having a length Nu, and a length NSEQ of the sequence part is Nu*n, where n is a positive integer, and
- wherein a length NCP,RA of the CP part satisfies NCP,RA+NSEQ=NRA.
A base station for receiving a random access channel (RACH) preamble in a wireless communication system, the base station comprising,
- a radio frequency (RF) unit, and
- a processor configured to control the RF unit,
- wherein the processor is configured to:
- control the RF unit to transmit RACH preamble configuration information;
- and
- control the RF unit to receive the RACH preamble using a RACH resource based on the RACH preamble configuration information,
- wherein the RACH resource is comprised of a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain,
- wherein a length NRA of the RACH preamble is equal to a total length of the plurality of OFDM symbols,
- wherein the RACH preamble consists of a cyclic prefix (CP) part and a sequence part,
- wherein the sequence part includes n preambles, each preamble having a length Nu, and a length NSEQ of the sequence part is Nu*n, where n is a positive integer, and
- wherein a length NCP,RA of the CP part satisfies NCP,RA+NSEQ=NRA.
Dependencies are inferred from the claim text.