Uplink transmission parameter selection during random access message transmission and retransmission
First Claim
1. A method for wireless communication at a user equipment (UE), comprising:
- identifying a first uplink transmission beam for a random access procedure;
transmitting, at a first uplink transmission power, a random access preamble based at least in part on the first uplink transmission beam;
receiving a random access response message transmitted from a base station in response to the random access preamble;
identifying a second uplink transmission beam;
selecting a second uplink transmission power based at least in part on a path loss associated with the random access procedure and the identified second uplink transmission beam, wherein selecting the second uplink transmission power is further based at least in part on a difference between a path loss associated with the random access response message and a path loss associated with transmission of the random access preamble; and
transmitting, to the base station, a connection request based at least in part on the second uplink transmission power and the second uplink transmission beam.
1 Assignment
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Accused Products
Abstract
Methods, systems, and devices for wireless communication are described for selecting different uplink transmission parameters for transmission or retransmission of a random access message. A user equipment (UE) may transmit or retransmit a random access message such as a layer 2 or layer 3 (L2/L3) message to a base station during a random access procedure. The UE may select a transmission beam, uplink resource or transmission power for the transmission of the L2/L3 message that differ from those used for transmission of a previous random access message. The selection may be based on path loss associated with synchronization signals or previous transmissions. The selection may also be based on a maximum number of retransmissions.
17 Citations
27 Claims
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1. A method for wireless communication at a user equipment (UE), comprising:
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identifying a first uplink transmission beam for a random access procedure; transmitting, at a first uplink transmission power, a random access preamble based at least in part on the first uplink transmission beam; receiving a random access response message transmitted from a base station in response to the random access preamble; identifying a second uplink transmission beam; selecting a second uplink transmission power based at least in part on a path loss associated with the random access procedure and the identified second uplink transmission beam, wherein selecting the second uplink transmission power is further based at least in part on a difference between a path loss associated with the random access response message and a path loss associated with transmission of the random access preamble; and transmitting, to the base station, a connection request based at least in part on the second uplink transmission power and the second uplink transmission beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for wireless communication at a user equipment (UE), comprising:
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transmitting a random access preamble as part of a random access procedure; receiving a random access response message transmitted from a base station in response to the random access preamble; identifying a first uplink transmission beam and a first uplink transmission power; transmitting, to the base station, a connection request based at least in part on the random access response message, the connection request being transmitted using the first uplink transmission beam and at the first uplink transmission power; identifying a second uplink transmission beam different from the first uplink transmission beam; selecting a second uplink transmission power based at least in part on a path loss associated with the random access procedure and the identified second uplink transmission beam, wherein selecting the second uplink transmission power is further based at least in part on a difference between a path loss associated with the random access response message and a path loss associated with transmission of the random access preamble; and retransmitting the connection request based at least in part on the second uplink transmission power and the second uplink transmission beam. - View Dependent Claims (15, 16, 17, 18)
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19. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to;
identify a first uplink transmission beam for a random access procedure;transmit, at a first uplink transmission power, a random access preamble based at least in part on the first uplink transmission beam; receive a random access response message transmitted from a base station in response to the random access preamble; identify a second uplink transmission beam; select a second uplink transmission power based at least in part on a path loss associated with the random access procedure and the identified second uplink transmission beam, wherein selecting the second uplink transmission power is further based at least in part on a difference between a path loss associated with the random access response message and a path loss associated with transmission of the random access preamble; and transmit, to the base station, a connection request based at least in part on the second uplink transmission power and the second uplink transmission beam. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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Specification