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US 12,004,217 B2Granted
Random access preamble sending method, random access preamble receiving method, and communications apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsLili Zhang, Chunhua You
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Abstract
A random access preamble sending method includes sending, by a terminal device, a first random access preamble to a network device, and sending, by the terminal device during a first time period, a second random access preamble to the network device when the terminal device does not receive a random access response and when a first sending moment arrives, where the first time period is a time window to receive the random access response from the network device, and wherein the first time period comprises the first sending moment.
Claims20
A method, wherein the method comprises:
- sending, from a terminal device during a first time period, a first random access preamble to a network device, wherein the first time period is a random access response (RAR) window configured with a preset time delay to receive a random access response from the network device;
- obtaining power configuration information indicating an association relationship between a first power ramping performed in the first time period and a second power ramping performed outside of the first time period, wherein a difference between a first increase magnitude of the first power ramping and a second increase magnitude of the second power ramping is a predetermined value;
- and
- sending, according to the power configuration information, during the same first time period and the same preset time delay of the first time period before the first time period ends, a second random access preamble to the network device when the terminal device does not receive a random access response prior to a first sending moment within the first time period.
1 more element
An apparatus comprising:
- a memory configured to store instructions;
- and
- at least one processor coupled to the memory, wherein the instructions cause the at least one processor to be configured to:
- send, during a first time period, a first random access preamble to a network device, wherein the first time period is a random access response (RAR) window configured with a preset time delay to receive a random access response from the network device;
- obtain power configuration information indicating an association relationship between a first power ramping performed in the first time period and a second power ramping performed outside of the first time period, wherein a difference between a first increase magnitude of the first power ramping and a second increase magnitude of the second power ramping is a predetermined value;
- and
- send, according to the power configuration information, during the first time period and the same preset time delay of the first time period before the first time period ends, a second random access preamble to the network device when the apparatus does not receive a random access response prior to a first sending moment within the first time period.
4 more elements
Dependencies are inferred from the claim text.