MAC layer communication for parallel random access procedures of dual connectivity
First Claim
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1. A method for communicating with a network at a user equipment (UE) in a wireless communication system, the method comprising:
- communicating with a first cell and a second cell according to a dual connectivity operation,wherein the dual connectivity operation is configured to utilize radio resources provided by a first network node and a second network node connected via a backhaul connection,wherein the first cell is served by the first network node and the second cell is served by the second network node;
determining if a second uplink transmission associated with the second cell overlaps with a first uplink transmission associated with the first cell and if a required transmission power for the first and the second uplink transmissions exceeds a transmission power limit of the UE, in order to determine whether the second uplink transmission associated with the second cell is performed or not;
transmitting a third uplink transmission associated with the second cell, as a retransmission of the second uplink transmission, without increasing a counter value used for power ramping on the retransmission of the second uplink transmission, in response determining that the second uplink transmission is not to be performed; and
transmitting a fourth uplink transmission associated with the second cell, as the retransmission of the second uplink transmission with increasing the counter value, in response determining that the second uplink transmission is performed but a response for the second uplink transmission is not received.
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Abstract
The present invention relates to MAC layer communication for parallel random access procedures of dual connectivity. In this scheme, a first MAC entity of a user equipment informs the initiation of the first random access procedure to a second MAC entity of the UE; and informs the completion of the first random access procedure to the second MAC entity, when the first random access procedure is finished.
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Citations
8 Claims
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1. A method for communicating with a network at a user equipment (UE) in a wireless communication system, the method comprising:
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communicating with a first cell and a second cell according to a dual connectivity operation, wherein the dual connectivity operation is configured to utilize radio resources provided by a first network node and a second network node connected via a backhaul connection, wherein the first cell is served by the first network node and the second cell is served by the second network node; determining if a second uplink transmission associated with the second cell overlaps with a first uplink transmission associated with the first cell and if a required transmission power for the first and the second uplink transmissions exceeds a transmission power limit of the UE, in order to determine whether the second uplink transmission associated with the second cell is performed or not; transmitting a third uplink transmission associated with the second cell, as a retransmission of the second uplink transmission, without increasing a counter value used for power ramping on the retransmission of the second uplink transmission, in response determining that the second uplink transmission is not to be performed; and transmitting a fourth uplink transmission associated with the second cell, as the retransmission of the second uplink transmission with increasing the counter value, in response determining that the second uplink transmission is performed but a response for the second uplink transmission is not received. - View Dependent Claims (2, 3, 4)
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5. A user equipment (UE) for communicating with a network in a wireless communication system, the UE comprising:
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a transceiver configured to communicate with a first cell and a second cell according to a dual connectivity operation, wherein the dual connectivity operation is configured to utilize radio resources provided by a first network node and a second network node connected via a backhaul connection, and wherein the first cell is served by the first network node and the second cell is served by the second network node; and a processor configured to determine if a second uplink transmission associated with the second cell overlaps with a first uplink transmission associated with the first cell and if a required transmission power for the first and the second uplink transmissions exceeds a transmission power limit of the UE, in order to determine whether the second uplink transmission associated with the second cell is performed or not, wherein the processor controls the transceiver to transmit a third uplink transmission associated with the second cell, as a retransmission of the second uplink transmission, without increasing a counter value used for power ramping on the retransmission of the second uplink transmission, in response determining that the second uplink transmission is not to be performed, and wherein the processor controls the transceiver to transmit a fourth uplink transmission associated with the second cell, as the retransmission of the second uplink transmission, with increasing the counter value, in response determining that the second uplink transmission is performed but a response for the second uplink transmission is not received. - View Dependent Claims (6, 7, 8)
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Specification