Random Access Reception and Message 3 Transmission for New Radio (NR) Based Satellite Communication
AssigneeApple Inc.
InventorMurali Narasimha
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Abstract
Embodiments disclosed herein include methods and apparatuses that enable the UE to transmit message 3 in an NTN network. A gNB can include, a time duration indicating the time at which the UE should transmit message 3. The network can ensure that the UE has adequate time to apply the timing advance, assemble and transmit message 3. The UE can compute time of UL grant application based on a timing advance. The time of application of the UL grant can be determined by the UE and by the gNB according to a specified rule.
Claims20
A method for performing a Random Access Channel (RACH) procedure, the method comprising:
- receiving a first message including a time-frequency resource for uplink transmission and a timing advance value;
- applying a timing advance according to the timing advance value prior to transmitting a second message;
- and
- transmitting, in the time-frequency resource, the second message in a time slot of a subframe that occurs after the timing advance.
An apparatus for performing a Random Access Channel (RACH) procedure, the method comprising:
- radio front end circuitry configured to:
- receive a first message including a time-frequency resource for uplink transmission and a timing advance value, and
- transmit, in the time-frequency resource, a second message in a time slot of a subframe that occurs after the timing advance;
- and
- processor circuitry configured to apply the timing advance according to the timing advance value prior to the radio front end circuitry transmitting the second message.
A system for performing a Random Access Channel (RACH) procedure, the system comprising:
- a Next Generation NodeB (gNB) configured to transmit a first message including a time-frequency resource for uplink transmission and a timing advance value,
- a user equipment (UE) configured to:
- apply a timing advance according to the timing advance value prior to transmitting a second message, and
- transmit, in the time-frequency resource, the second message in a time slot of a subframe that occurs after the timing advance.
Dependencies are inferred from the claim text.