Device and method of handling scheduling request for logical channel

A communication device for handling a scheduling request (SR) for a logical channel (LC), comprising:

• a storage device;
• and
• a processing circuit, coupled to the storage device, wherein the storage device stores, and the processing circuit is configured to execute instructions of:
• transmitting a first SR for a first LC to a network and starting a first sr-ProhibitTimer associated to the first LC, when the first SR is triggered by the first LC and the first sr-ProhibitTimer is not running;
• not transmitting the first SR for the first LC, when the first SR is triggered by the first LC and the first sr-ProhibitTimer is running;
• transmitting a second SR for a second LC to the network and starting a second sr-ProhibitTimer associated to the second LC, when the second SR is triggered by the second LC and the second sr-ProhibitTimer is not running;
• not transmitting the second SR triggered by the second LC, when the second SR is triggered by the second LC and the second sr-ProhibitTimer is running;
• transmitting a third SR for a third LC and starting the first sr-ProhibitTimer associated to the first LC, when the third SR is triggered by the third LC and the first sr-ProhibitTimer is not running;
• and
• not transmitting the third SR triggered by the third LC, when the third SR is triggered by the third LC and the first sr-ProhibitTimer is running,
• wherein the first LC belongs to a first LC group (LCG), the second LC belongs to a second LCG, and the third LC belongs to the first LCG.