Patent ID: 8665836
Filing Date: 2014-03-04
Classification: H04L,H04W,Y02D

Abstract:
1. A method for a user equipment (UE) to inform a network of a situation occurring at the UE using a variable having a specific value in a mobile communication system, the method comprising: receiving a first grant message from the network, wherein either an absolute grant or a relative grant is used in the first grant message; transmitting data to the network in a form of a medium access control protocol data unit (MAC PDU) via radio resources allocated to the UE by the first grant message; transmitting, when there is no more data to configure a new MAC PDU at the UE and the UE has only one MAC PDU left in a buffer to transmit (last MAC PDU), scheduling information with the variable having the specific value to the network; receiving a second grant message from the network in response to the scheduling information, wherein only the absolute grant is used in the second grant message; transmitting the last MAC PDU to the network via radio resources allocated to the UE by the second grant message; and releasing the radio resources allocated to the UE after transmitting the last MAC PDU to the network.