Figure 9

Average value of backoff time; top row: CCH (a) backoff time for L = 900 m (CCH), (b) backoff time for L = 500 m (CCH), (c) backoff time for L = 350 m (CCH); bottom row: SCH (d) backoff time for L = 900 m (SCH), (e) backoff time for L = 500 m (SCH), (f) backoff time for L = 350 m (SCH).