Method for Maintaining Time Advance Timer, Base Station and Terminal Equipment

Abstract

A terminal equipment including: 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.

What is claimed is: 
     
         1 . 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.   
     
     
         2 . 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 as expired, when it is 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.