System and method of identifying random access response
A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT) is provided. The communication method and system include intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method includes transmitting a random access preamble on a physical random access channel (PRACH) transmission occasion from a base station, identifying a random access radio network temporary identifier (RA-RNTI) for receiving random access response (RAR) information based on a time related parameter, a frequency related parameter and an uplink carrier related parameter, and receiving scheduling assignment information scheduling a physical downlink shared channel (PDSCH) on a physical downlink control channel (PDCCH) based on the identified RA-RNTI from the base station.
1. A method performed by a terminal in a wireless communication system, the method comprising:
transmitting a random access preamble to a base station;
identifying a random access radio network temporary identifier (RA-RNTI) for receiving a random access response (RAR) message based on an orthogonal frequency division multiplexing (OFDM) symbol related parameter, a slot related parameter, a frequency related parameter, and a parameter indicating whether an uplink carrier on which the random access preamble is transmitted is a supplemental uplink carrier or not; and
receiving the RAR message based on the RA-RNTI from the base station,
wherein the RA-RNTI is identified based on following equation:
RA-RNTI=1+ t_id 1 +X 1* t _ id 2+ X 1* X 2* f _ id+X 1* X 2* Y*c _ id,
where t_id1 is the OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a PRACH transmission occasion, t_id2 is the slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is the frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is the parameter associated with the uplink carrier, X1 is a maximum number of OFDM symbols in a slot, X2 is a maximum number of slots in a radio frame, and Y is a maximum number of PRACH transmission occasions in a frequency domain.
2. A method performed by a base station in a wireless communication system, the method comprising:
receiving a random access preamble from a terminal;
identifying a random access radio network temporary identifier (RA-RNTI) for transmitting a random access response (RAR) message based on an orthogonal frequency division multiplexing (OFDM) symbol related parameter, a slot related parameter, a frequency related parameter, and a parameter indicating whether an uplink carrier on which the random access preamble is received is a supplemental uplink carrier or not; and
transmitting the RAR message based on the RA-RNTI to the terminal,
wherein the RA-RNTI is identified based on following equation:
RA-RNTI=1+ t _ id 1+ X 1* t _ id 2+ X 1* X 2* f _ id+X 1* X 2* Y*c _ id,
where t_id1 is the OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a PRACH transmission occasion, t_id2 is the slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is the frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is the parameter associated with the uplink carrier, X1 is a maximum number of OFDM symbols in a slot, X2 is a maximum number of slots in a radio frame, and Y is a maximum number of PRACH transmission occasions in a frequency domain.
3. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
transmit a random access preamble to a base station,
identify a random access radio network temporary identifier (RA-RNTI) for receiving a random access response (RAR) message based on an orthogonal frequency division multiplexing (OFDM) symbol related parameter, a slot related parameter, a frequency related parameter, and a parameter indicating whether an uplink carrier on which the random access preamble is transmitted is a supplemental uplink carrier or not, and receive the RAR message based on the RA-RNTI from the base station,
wherein the RA-RNTI is identified based on following equation:
RA-RNTI=1+ t _ id 1+ X 1* t _ id 2+ X 1* X 2* f _ id+X 1* X 2* Y*c _ id,
where t_id1 is the OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a PRACH transmission occasion, t_id2 is the slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is the frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is the parameter associated with the uplink carrier, X1 is a maximum number of OFDM symbols in a slot, X2 is a maximum number of slots in a radio frame, and Y is a maximum number of PRACH transmission occasions in a frequency domain.
4. A base station in a wireless communication system, the base station comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive a random access preamble from a terminal,
identify a random access radio network temporary identifier (RA-RNTI) for transmitting a random access response (RAR) message based on an orthogonal frequency division multiplexing (OFDM) symbol related parameter, a slot related parameter, a frequency related parameter, and a parameter indicating whether an uplink carrier on which the random access preamble is received is a supplemental uplink carrier or not, and transmit the RAR message based on the RA-RNTI to the terminal,
wherein the RA-RNTI is identified based on following equation:
RA-RNTI=1+ t _ id 1+ X 1* t _ id 2+ X 1* X 2* f _ id+X 1* X 2* Y*c _ id,
where t_id1 is the OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a PRACH transmission occasion, t_id2 is the slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is the frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is the parameter associated with the uplink carrier, X1 is a maximum number of OFDM symbols in a slot, X2 is a maximum number of slots in a radio frame, and Y is a maximum number of PRACH transmission occasions in a frequency domain.