Method for Maintaining Time Advance Timer, Base Station and Terminal Equipment
AssigneeFujitsu Limited
InventorsYanling LU, Haibo XU, Weiwei WANG
Life of this patent
Estimating the term…
Abstract
A base station including: a judging unit configured to judge whether a band to be uplink adjusted includes only a band corresponding to a primary cell; and a transmitter configured to transmit a command for the band corresponding to the primary cell when the judging unit determines that the band to be uplink adjusted includes only the band corresponding to the primary cell, such that a timer relating to an uplink synchronization for the band corresponding to the primary cell is restarted.
Claims5
A base station comprising:
- a judging unit configured to judge whether a band to be uplink adjusted includes only a band corresponding to a primary cell;
- and
- a transmitter configured to transmit a command for the band corresponding to the primary cell when the judging unit determines that the band to be uplink adjusted includes only the band corresponding to the primary cell, such that a timer relating to an uplink synchronization for the band corresponding to the primary cell is restarted.
A method for maintaining timer relating to an uplink synchronization, the method comprising:
- if an expired timer relating to an uplink synchronization is a timer relating to an uplink synchronization associated with a band corresponding to a primary cell and if there is arrival of uplink data, initiating by a terminal a random access procedure.
A terminal equipment comprising:
- a processor circuit configured to flush a hybrid automatic repeat request buffer in all bands, release a physical uplink control channel and sounding reference signals corresponding to carriers in all the bands, clear any configured downlink assignments and uplink grants, and treat running timers relating to uplink synchronization associated with the bands corresponding to secondary cells as expired, if the expired timer relating to an uplink synchronization includes the timer relating to an uplink synchronization associated with the band corresponding to the primary cell.
A terminal equipment comprising:
- a processor circuit coupled to a receiver, the processor configured to:
- determine whether an expired timer relating to an uplink synchronization is a timer relating to an uplink synchronization associated with a band corresponding to a primary cell;
- and
- flush a hybrid automatic repeat request buffer in all bands, release a physical uplink control channel and sounding reference signals corresponding to carriers in all the bands, clear any configured downlink assignments and uplink grants, and treat running timers relating to an uplink synchronization associated with the bands corresponding to secondary cells, when determined that the expired timer relating to an uplink synchronization includes the timer relating to an uplink synchronization associated with the band corresponding to the primary cell.
Dependencies are inferred from the claim text.