Dear colleagues,
   
  In the section 4.1.8 Latency "ARQ loop delay" is required to 
  be less than 10ms.
  If I understand the ARQ loop delay correctly, it 
  includes
  - TX time of a physical frame,
  - Propagation time over the air,
  - RX time of a physical frame,
  - Processing time for acknowledgement,
  - TX time of a ACK/NACK frame, 
  - Propagation time over the air, and
  - RX time of an ACK/NACK frame.
  ARQ loop delay includes 4 times of physical 
  frame
  if we assume ACK/NACK information is transffered in a 
  physical frame.
  Limiting the delay within 10ms results in limiting the size 
  of a physical frame 
  less than 2.5ms.
  This requirement will highly restrict physical design 
  of MBWA.
  I think the size of a physical frame should be determined 
  
  considering not only delay factor but also many other 
  factors.
   
  Thus I would like to propose that 10ms requirement in ARQ 
  loop delay be removed.
   
  Best regards, 
  Jin
   
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