Probes

• a (Frame start): Fill the scheduler queue, queue is limited per connection

  • (1): Wait for frame start + wait for space in scheduler queue

• b (Scheduled): IP PDU segment is removed from queue

  • (2): Delay until last segment of IP PDU is extracted
  • (2) UL: Wait to receive MAP, extract PDUs at UL subframe start

• c (TX Start): Transmission start

  • (3): Time offset within the currently scheduled frame

• d (TX Stop): Transmission stop

  • (4): Transmission time (PDU length in bit / data rate)

• e (Reassembled): IP PDU fully reassembled and passed to layer 3

  • (5): Reassembly delay

    • Wait for last segment of IP PDU
    • Wait for last segment of earlier IP PDUs or wait for them to be dropped

Probe delay and loss:

• Between two points (“Tick”, “Tack”)
• delay: tackTime - tickTime
• loss: sum(tickBit) - sum(tackBit)
• “Tick” is a FU
• “Tack” is FU or implemented in a FU / class

from sender to reciever

at sender at resciever

“Tick” & “Tack” in same FU//class

Probes:

• TopProbe: wimac.top.packet.

  • incoming.delay
  • incoming.size
  • outgoing.size

• BufferTickTack: wimac.buffer.

  • delay
  • start.compoundSize
  • stop.compoundSize

• SchedulerTick => Queue:

  • wimac.schedulerQueue.delay

• Callback (system specific scheduler output interpreter)

  • wimac.frameOffsetDelay
  • wimac.transmissionDelay

• CRCTickTack: wimac.crc.

  • start.compoundSize
  • stop.compoundSize (Probe channel errors)

• DeSegDeConcanat: wimac.reassembly.

  • minDelay
  • maxDelay
  • start/stop.compoundSize