said allocation unit allocates respective bandwidth to said {HEAD ~ plurality} of {TAIL ~ logical channels} based on the priority given to each receiving device 
said allocation unit allocates respective bandwidth to said { HEAD ~ plurality } of { TAIL ~ logical channels } based on the priority given to each receiving device
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH