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US 12,193,067 B2Granted
Method and apparatus of determining RA-RNTI and user equipment
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorZuomin Wu
Life of this patent
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Abstract
Disclosed is a method of determining a random access radio network temporary identifier (RA-RNTI) and related product. In the method, a first indication of a plurality of frequency domain random access occasions (ROs) M_RO over which physical random access channel (PRACH preamble) is transmitted is obtained, a second indication about a set of PRACH sequence candidates to be selected for PRACH preamble transmission is obtained, an initial RO index is determined; and the RA-RNTI is determined based on the initial RO index and the PRACH sequence transmitted over the M_RO.
Claims15
A method of determining a random access radio network temporary identifier (RA-RNTI), executed by a user equipment (UE), comprising:
- obtaining a first indication of a plurality of frequency domain random access occasions (ROs) M_RO over which physical random access channel (PRACH) preamble is transmitted;
- obtaining a second indication about a set of PRACH sequence candidates to be selected for PRACH preamble transmission;
- determining an initial RO index;
- and
- determining the RA-RNTI based on the initial RO index and a PRACH sequence transmitted over the plurality of frequency domain ROs M_RO, wherein the UE determines the RA-RNTI such that a value of the RA-RNTI has a first pre-defined relationship between on the initial RO index and a first offset, where the first offset has a second relationship with the transmitted PRACH sequence over the plurality of frequency domain ROs M_RO, wherein the first pre-defined relationship is RA-RNTI=1+s_id+14×t_id+14×80×f_id_nru+14×80×8×ul_carrier_id,
- where s_id is an index of a first OFDM symbol of a PRACH occasion, 0≤s_id<14, t_id is an index of a first slot of the PRACH occasion in a system frame, 0≤t_id<80, f_id nru is an index of NRU PRACH occasion in a frequency domain, 0<f_id_nru <8, and ul_carrier_id is a UL carrier used for Random Access Preamble transmission, ul_carrier_id is 0 for NUL carrier, and ul_carrier_id is 1 for SUL carrier, and f_id_nru is derived by the initial RO index and the PRACH sequence transmitted over the plurality of frequency domain ROs M_RO according to the second relationship.
3 more elements
An apparatus of determining a random access radio network temporary identifier (RA-RNTI), comprising:
- an obtaining unit, configured to obtain a first indication of a plurality of frequency domain random access occasions (ROs) M_RO over which physical random access channel (PRACH) preamble is transmitted, and obtain a second indication about a set of PRACH sequence candidates to be selected for PRACH preamble transmission;
- and
- a determination unit, configured to determine an initial RO index, and determine the RA-RNTI based on the initial RO index and the PRACH sequence transmitted over the plurality of frequency domain ROs M_RO, wherein the determination unit is configured to determine the RA-RNTI such that a value of the RA-RNTI has a first pre-defined relationship between on the initial RO index and a first offset, where the first offset has a second relationship with the transmitted PRACH sequence over the plurality of frequency domain ROs M_RO, wherein the first pre-defined relationship is RA-RNTI=1+s_id+14×t_id+14×80×f_id_nru+14×80×8×ul_carrier_id,
- where s_id is an index of a first OFDM symbol of a PRACH occasion, 0≤s_id<14, t_id is an index of a first slot of the PRACH occasion in a system frame, 0≤t_id<80, f_id_nru is an index of an NRU PRACH occasion in the frequency domain, 0≤f_id_nru<8, and ul_carrier_id is a UL carrier used for Random Access Preamble transmission, ul_carrier_id is 0 for NUL carrier, and ul carrier id is 1 for SUL carrier, and f_id_nru is derived by the initial RO index and the PRACH sequence transmitted over the plurality of frequency domain M_RO according to the second relationship.
1 more element
A user equipment (UE), comprising:
- a memory storing a computer program;
- and
- a processor, adapted to call and execute the computer program stored in the memory to execute:
- obtaining a first indication of a plurality of frequency domain random access occasions (ROs) M_RO over which physical random access channel (PRACH) preamble is transmitted;
- obtaining a second indication about a set of PRACH sequence candidates to be selected for PRACH preamble transmission;
- determining an initial RO index;
- and
- determining the RA-RNTI based on the initial RO index and a PRACH sequence transmitted over the plurality of frequency domain ROs M_RO, wherein the processor determines the RA-RNTI such that a value of the RA-RNTI has a first pre-defined relationship between on the initial RO index and a first offset, where the first offset has a second relationship with the transmitted PRACH sequence over the plurality of frequency domain ROs M_RO, wherein the first pre-defined relationship is RA-RNTI=1+s_id+14×t_id+14×80×f_id_nru+14×80×8×ul_carrier_id,
- where s_id is an index of a first OFDM symbol of a PRACH occasion, 0≤s_id<14, t_id is an index of a first slot of the PRACH occasion in a system frame, 0≤t_id<80, f_id_nru is an index of NRU PRACH occasion in a frequency domain, 0≤f_id_nru<8, and ul_carrier_id is a UL carrier used for Random Access Preamble transmission, ul_carrier_id is 0 for NUL carrier, and ul_carrier_id is 1 for SUL carrier, and f_id_nru is derived by the initial RO index and the PRACH sequence transmitted over the plurality of frequency domain ROs M_RO according to the second relationship.
6 more elements
Dependencies are inferred from the claim text.