Terminal device of carrier aggregation based mobile communication system and buffer status reporting method thereof
AssigneeElectronics and Telecommunications Research Institute
InventorsJae Wook SHIN, Kwang Ryul Jung, Soon Yong Lim, Ae-soon Park
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Abstract
Provided is a buffer status reporting method of a terminal device in a mobile communication system. The buffer status reporting method includes obtaining a radio resource allocation for a plurality of component carriers from a base station, configuring a plurality of medium access control-protocol data units (MAC-PDUs) including buffer status information corresponding to the plurality of component carriers, the plurality of MAC-PDUs including generated sequence numbers (SNs), and transmitting the plurality of MAC-PDUs to the base station through the plurality of component carriers.
Claims14
A buffer status reporting method of a terminal device in a mobile communication system, the method comprising:
- obtaining a radio resource allocation for a plurality of component carriers from a base station;
- generating a plurality of medium access control-protocol data units (MAC-PDUs) comprising buffer status information corresponding to the plurality of component carriers, the plurality of MAC-PDUs comprising generated sequence numbers (SNs);
- and
- transmitting the plurality of MAC-PDUs to the base station through the plurality of component carriers.
A method of requesting for a scheduling from a base station after a buffer status reporting is triggered in a multi-component carrier-based mobile communication system terminal, the method comprising:
- detecting whether there is a radio resource allocation to at least one component carrier;
- determining whether an uplink control channel of a component carrier finally used in a random access is usable if there is no radio resource allocation;
- checking whether there is other component carrier corresponding to a usable uplink control channel if the uplink control channel is unusable;
- and
- executing a scheduling request by performing the random access if there is no component carrier having the useable uplink control channel.
A terminal device in a carrier aggregation-based mobile communication system, the terminal device comprising:
- transmission buffers storing transmission packets and corresponding to a plurality of component carriers, respectively;
- a control unit sequentially generating MAC-PDUs comprising buffer status information of the transmission buffers corresponding to one or more component carriers assigned with uplink radio resource among the plurality of component carriers, MAC-PDUs comprising generated SNs;
- and
- a transmission unit transmitting the MAC-PDUs to the assigned component carrier according to the control of the control unit.
Dependencies are inferred from the claim text.