Communication between MAC and PHY for parallel random access procedures of dual connectivity
AssigneeLG Electronics Inc.
InventorsSunyoung Lee, Seungjune Yi, Sungjun Park, Youngdae Lee
Life of this patent
Estimating the term…
Abstract
The present invention relates to a communication between MAC layer entity and PHY layer entity for parallel random access procedures of dual connectivity. In this scheme, a first PHY entity of a user equipment informs a failure of a random access preamble transmission to a first MAC entity of the UE. Then, the first MAC entity continues or stops a random access procedure without performing procedures for a random access failure.
Claims10
A method of operating a user equipment (UE) in a wireless communication system supporting dual connectivity (DC), the method comprising:
- performing, by the UE, a random access procedure with a base station (BS), the random access procedure comprising:
- an initial attempt to transmit a random access preamble to the BS at an initial transmission power that is based on an initial value of a counter for power ramping;
- one or more subsequent attempts to transmit the random access preamble to the BS without incrementing the initial value of the counter for power ramping based on the initial attempt to transmit the random access preamble to the BS not resulting in an actual transmission due to a power allocation for signals occurring at the same time as the initial attempt to transmit the random access preamble to the BS,
- successfully transmitting the random access preamble to the BS based on the initial value of the counter for power ramping;
- attempting to receive a random access response from the BS in response to the successfully transmitted random access preamble,
- incrementing the value of the counter for power ramping and attempting to retransmit the random access preamble to the BS at a corresponding incremented transmission power based on not receiving the random access response.
A user equipment (UE) for operating in a wireless communication system supporting dual connectivity (DC), the UE comprising:
- a memory;
- a transceiver;
- and
- a processor operatively connected to the memory and the transceiver, the processor for:
- performing, by the UE, a random access procedure with a base station (BS), the random access procedure comprising:
- an initial attempt to transmit a random access preamble to the BS at an initial transmission power that is based on an initial value of a counter for power ramping;
- one or more subsequent attempts to transmit the random access preamble to the BS without incrementing the initial value of the counter for power ramping based on the initial attempt to transmit the random access preamble to the BS not resulting in an actual transmission due to a power allocation for signals occurring at the same time as the initial attempt to transmit the random access preamble to the BS;
- successfully transmitting the random access preamble to the BS based on the initial value of the counter for power ramping;
- attempting to receive a random access response from the BS in response to the successfully transmitted random access preamble,
- incrementing the value of the counter for power ramping and attempting to retransmit the random access preamble to the BS at a corresponding incremented transmission power based on not receiving the random access response.
Dependencies are inferred from the claim text.