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
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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.
Claims8
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 second cell node while there is a transmission of a signal to a first cell node, the random access procedure comprising:
- an initial attempt to transmit a random access preamble to the second cell node using a first target power, wherein the first target power is determined based on a counter for a number of attempts to transmit the random access preamble;
- and
- one or more subsequent attempts to transmit the random access preamble to the second cell node,
- wherein the subsequent attempts comprise:
- determining a second target power based on the counter without incrementing the counter based on determination that the UE cannot transmit the random access preamble using the first target power;
- and
- selecting a random access resource including a backoff parameter, wherein the backoff parameter is predefined based on that the initial attempt to transmit the random access preamble does not result in an actual transmission.
A user equipment (UE) 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 a random access procedure with a second cell node while there is a transmission of a signal to a first cell node, the random access procedure comprising:
- an initial attempt to transmit a random access preamble to the second cell node using a first target power, wherein the first target power is determined based on a counter for a number of attempts to transmit the random access preamble;
- and
- one or more subsequent attempts to transmit the random access preamble to the second cell node,
- wherein the subsequent attempts comprise:
- determining a second target power based on the counter without incrementing the counter based on determination that the UE cannot transmit the random access preamble using the first target power;
- and
- selecting a random access resource including a backoff parameter, wherein the backoff parameter is predefined based on that the initial attempt to transmit the random access preamble does not result in an actual transmission.
Dependencies are inferred from the claim text.