Apparatus and method of random access precedure
AssigneeSamsung Electronics Co., Ltd.
InventorsAnil Agiwal, Hyunjeong Kang
Life of this patent
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Abstract
A communication method and system for converging a fifth generation (5G) communication system for supporting higher data rates beyond a fourth generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system may be applied to 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 for performing a random access procedure in a wireless communication system is provided.
Claims18
A method performed by a terminal of a random access procedure for a small data transmission, the method comprising:
- receiving, from a base station, at least one synchronization signal block (SSB);
- identifying at least one preamble associated with the at least one SSB based on first information on a number of preambles per SSB and second information on a starting index, for one of a 4-step random access procedure or a 2-step random access procedure for the small data transmission;
- selecting a preamble from the identified at least one preamble corresponding to an SSB selected from the at least one SSB;
- and
- transmitting, to a base station, the selected preamble in a physical random access channel (PRACH) occasion corresponding to the selected SSB.
A method performed by a base station of a random access procedure for a small data transmission, the method comprising:
- transmitting, to a terminal, at least one synchronization signal block (SSB);
- and
- receiving, from the terminal, a preamble for one of a 4-step random access procedure or a 2-step random access procedure for the small data transmission, in a physical random access channel (PRACH) occasion corresponding to an SSB among the at least one SSB,
- wherein at least one preamble associated with the at least one SSB is identified based on first information on a number of preambles per SSB and second information on a starting index for one of the 4-step random access procedure or the 2-step random access procedure for the small data transmission, and
- the preamble corresponding to the SSB is selected from the at least one preamble.
A terminal of a random access procedure for a small data transmission, the terminal comprising:
- a transceiver;
- and
- a controller coupled with the transceiver and configured to control to:
- receive, from a base station, at least one synchronization signal block (SSB),
- identify at least one preamble associated with the at least one SSB based on first information on a number of preambles per SSB and second information on a starting index, for one of a 4-step random access procedure or a 2-step random access procedure for the small data transmission,
- selecting a preamble from the identified at least one preamble corresponding to an SSB selected from the at least one SSB, and
- transmit, to a base station, the selected preamble in a physical random access channel (PRACH) occasion corresponding to the selected SSB.
A base station of a random access procedure for a small data transmission, the base station comprising:
- a transceiver;
- and
- a controller coupled with the transceiver and configured to control to:
- transmit, to a terminal, at least one synchronization signal block (SSB), and
- receive, from the terminal, a preamble for one of a 4-step random access procedure or a 2-step random access procedure for the small data transmission, in a physical random access channel (PRACH) occasion corresponding to an SSB among the at least one SSB,
- wherein at least one preamble associated with the at least one SSB is identified based on first information on a number of preambles per SSB and second information on a starting index for one of the 4-step random access procedure or the 2-step random access procedure for the small data transmission, and
- the preamble corresponding to the SSB is selected from the at least one preamble.
Dependencies are inferred from the claim text.