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US 2019/0159133 A1Published application
Method for sending preamble sequence and user equipment
AssigneeHuawei Technologies Co., Ltd.
InventorDeping Liu
Life of this patent
Estimating the term…
Abstract
The present disclosure discloses a method and user equipment for sending a preamble sequence. The method includes determining a transmit power for sending a preamble sequence, and sending the preamble sequence according to the determined transmit power.
Claims21
A method for sending a preamble sequence, the method comprising:
- determining, by user equipment, a transmit power for sending the preamble sequence, wherein the transmit power meets:
- Power=min{Pmax, PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter+PL};
- sending, by the user equipment, the preamble sequence according to the determined transmit power through a resource i;
- wherein Power is a determined transmit power, Pmax is a maximum transmit power of the user equipment, PL is obtained by estimating according to a downlink path loss, and PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter is a target receive power of the preamble sequence, and the resource i is a preamble sequence resource for coverage enhancement random access;
- wherein PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter=preambleInitialReceivedTargetPower+DELTA_PREAMBLE−Xi+preamble_transmission_counter−1)*powerRampingStep, and preamble_InitialReceivedTargetPower is an initial target receive power of the preamble sequence, DELTA_PREAMBLE is a power offset based on a preamble sequence format of the preamble sequence, powerRampingStep is a power ramp step, preamble_transmission_counter is a retransmission count of the preamble sequence, and Xi is a power offset corresponding to the preamble sequence resource i.
2 more elements
An apparatus, comprising:
- one or more processors, and
- a non-transitory storage medium configure to store program instructions;
- wherein, when executed by the one or more processors, the instructions cause the apparatus to perform a method that comprises:
- determining a transmit power for sending a preamble sequence, wherein the transmit power meets the following formula:
- Power=min{Pmax, PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter+PL};
- and
- sending the preamble sequence according to the determined transmit power through a resource i;
- wherein Power is the determined transmit power, Pmax is a maximum transmit power of the user equipment, PL is obtained by estimating according to a downlink path loss, and PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter is a target receive power of the preamble sequence, and the resource i is a preamble sequence resource for coverage enhancement random access;
- wherein PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter=preambleInitialReceivedTargetPower+DELTA_PREAMBLE−Xi+(preamble_transmission_counter−1)*powerRampingStep, and
- preambleInitialReceivedTargetPower is an initial target receive power of the preamble sequence, DELTA_PREAMBLE is a power offset based on a format of the preamble sequence, powerRampingStep is a power ramp step, preamble_transmission_counter is a repetition count for transmitting the preamble sequence, and Xi is a power offset corresponding to the preamble sequence resource i.
7 more elements
A non-transitory computer-readable medium having program instructions recorded thereon, wherein, when executed by a processor of a terminal device, the instructions cause the terminal device to:
- determine a transmit power for sending a preamble sequence, wherein the transmit power meets the following formula:
- Power=min{Pmax, PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter+PL};
- send the preamble sequence according to the determined transmit power through a resource i;
- wherein Power is the determined transmit power, Pmax is a maximum transmit power of the user equipment, PL is obtained by estimating according to a downlink path loss, and PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter is a target receive power of the preamble sequence, and the resource i is a preamble sequence resource for coverage enhancement random access;
- wherein PREAMBLE_RECEIVED_TARGET_POWERipreamble_transmission_counter=preambleInitialReceivedTargetPower+DELTA_PREAMBLE−Xi+(preamble_transmission_counter−1)*powerRampingStep, and
- preambleInitialReceivedTargetPower is an initial target receive power of the preamble sequence, DELTA_PREAMBLE is a power offset based on a format of the preamble sequence, powerRampingStep is a power ramp step, preamble_transmission_counter is a retransmission count of the preamble sequence, and Xi is a power offset corresponding to the preamble sequence resource i.
3 more elements
Dependencies are inferred from the claim text.