Structure of message from user equipment to base station in 2-step random access
AssigneeNokia Technologies Oy
InventorsEmad FARAG, Frank Frederiksen, Nuno Manuel Kiilerich Pratas
Life of this patent
Estimating the term…
Abstract
Fallback aspects associated with the power ramping procedure are addressed. More specifically, a set of control mechanisms allows for a gNB to adjust thresholds for controlling the UE transfer from a 2-step RACH procedure to a 4-step RACH procedure while still maintaining a proper setting for transmit power during this transition. The mechanism will allow for a UE to have a smooth transition to the 4-stepprocedure instead of having to start the power ramping from scratch when transferring to the fall-back routine.
Claims23
A method, comprising:
- receiving, by a user equipment, information from a network, the information including power ramping data representing a power ramping configuration for a scheme that enables fallback from a 2-step random access channel procedure to a 4-step random access channel procedure;
- determining a first power value for the 2-step random access channel procedure;
- transmitting, by the user equipment, a first message to a base station at a first power value over a physical random access channel and a physical uplink shared channel resource in time and frequency space according to the 2-step random access channel procedure, the first message including a preamble configured to be transmitted over the physical random access channel and message data configured to be sent over the physical uplink shared channel resource;
- and
- generating, by the user equipment, a second power value based on the power ramping configuration, the second power being an initial power value for the 4-step random access channel procedure.
-22. (canceled)
An apparatus, comprising:
- at least one processor;
- and
- at least one memory including computer program code;
- the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
- receive information from a network, the information including power ramping data representing a power ramping configuration for a scheme that enables fallback from a 2-step random access channel procedure to a 4-step random access channel procedure;
- determine a first power value for the 2-step random access channel procedure;
- transmit a first message to a base station at a first power value over a physical random access channel and a physical uplink shared channel resource in time and frequency space according to the 2-step random access channel procedure, the first message including a preamble configured to be transmitted over the physical random access channel and message data configured to be sent over the physical uplink shared channel resource;
- and
- generate a second power value based on the power ramping scheme, the second power being an initial power value for the 4-step random access channel procedure.
-66. (canceled)
A computer program product including a non-transitory computer-readable storage medium and storing executable code that, when executed by at least one data processing apparatus, is configured to cause the at least one data processing apparatus to:
- receive information from a network, the information including power ramping data representing a power ramping configuration for a scheme that enables fallback from a 2-step random access channel procedure to a 4-step random access channel procedure;
- determine a first power value for the 2-step random access channel procedure;
- transmit a first message to a base station at a first power value over a physical random access channel and a physical uplink shared channel resource in time and frequency space according to the 2-step random access channel procedure, the first message including a preamble configured to be transmitted over the physical random access channel and message data configured to be sent over the physical uplink shared channel resource;
- and
- generate a second power value based on the power ramping scheme, the second power being an initial power value for the 4-step random access channel procedure.
(canceled)
Dependencies are inferred from the claim text.