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) of a random access response (RAR) message based on an equation; and
receiving the RAR message from the base station,
wherein the equation is as follows:
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 an OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a physical random access channel (PRACH) transmission occasion in which the random access preamble is transmitted, t_id2 is a slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is a frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is a parameter associated with an 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 number associated with the frequency domain, and
wherein a value of the parameter associated with the uplink carrier corresponds to whether the uplink carrier on which the random access preamble is transmitted is a supplemental uplink carrier or not.
2. The method of claim 1 , wherein the X1 is 14.
3. The method of claim 1 , wherein the X2 is 80.
4. The method of claim 1 , wherein the value of the parameter associated with the uplink carrier is 1 in case that the uplink carrier is the supplemental uplink carrier, and 0 in case that the uplink carrier is not the supplemental uplink carrier.
5. 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) of a random access response (RAR) message based on an equation; and
transmitting the RAR message to the terminal,
wherein the equation is as follows:
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 an OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a physical random access channel (PRACH) transmission occasion in which the random access preamble is transmitted, t_id2 is a slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is a frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is a parameter associated with an 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 number associated with the frequency domain, and
wherein a value of the parameter associated with the uplink carrier corresponds to whether the uplink carrier on which the random access preamble is transmitted is a supplemental uplink carrier or not.
6. The method of claim 5 , wherein the X1 is 14.
7. The method of claim 5 , wherein the X2 is 80.
8. The method of claim 5 , wherein the value of the parameter associated with the uplink carrier is 1 in case that the uplink carrier is the supplemental uplink carrier, and 0 in case that the uplink carrier is not the supplemental uplink carrier.
9. 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) of a random access response (RAR) message based on an equation, and
receive the RAR message from the base station,
wherein the equation is as follows:
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 an OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a physical random access channel (PRACH) transmission occasion in which the random access preamble is transmitted, t_id2 is a slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is a frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is a parameter associated with an 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 number associated with the frequency domain, and
wherein a value of the parameter associated with the uplink carrier corresponds to whether the uplink carrier on which the random access preamble is transmitted is a supplemental uplink carrier or not.
10. The terminal of claim 9 , wherein the X1 is 14.
11. The terminal of claim 9 , wherein the X2 is 80.
12. The terminal of claim 9 , wherein the value of the parameter associated with the uplink carrier is 1 in case that the uplink carrier is the supplemental uplink carrier, and 0 in case that the uplink carrier is not the supplemental uplink carrier.
13. 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) of a random access response (RAR) message based on an equation, and
transmit the RAR message to the terminal,
wherein the equation is as follows:
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 an OFDM symbol related parameter corresponding to an index of a first OFDM symbol of a physical random access channel (PRACH) transmission occasion in which the random access preamble is transmitted, t_id2 is a slot related parameter corresponding to an index of a first slot of the PRACH transmission occasion, f_id is a frequency related parameter corresponding to an index of the PRACH transmission occasion in a frequency domain, c_id is a parameter associated with an 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 number associated with the frequency domain, and
wherein a value of the parameter associated with the uplink carrier corresponds to whether the uplink carrier on which the random access preamble is transmitted is a supplemental uplink carrier or not.
14. The base station of claim 13 , wherein the X1 is 14.
15. The base station of claim 13 , wherein the X2 is 80.
16. The base station of claim 13 , wherein the value of the parameter associated with the uplink carrier is 1 in case that the uplink carrier is the supplemental uplink carrier, and 0 in case that the uplink carrier is not the supplemental uplink carrier.