mobileman wifi economic topics jon crowcroft [email protected]
TRANSCRIPT
Mobileman
Mobileman Kickoff MeetingPisa, 5/11/02
• WiFi and p2p• Spectrum Economics
Mobileman
Some possible 2ndary collaborators
• In CMI, we have • Richard Steinberg, JIMS, Cambridge – RF Auctions
• David Newbury, Applied Economics, Cambridge-component markets, externalities etc
• Frank Kelly, Stats Lab, Cambridge - congestion charging
• Tolga Uzuner, PhD student, complexity of charging
• DDC/Karen Sollins et al at MIT LCS
• RCA (Robert |Leese at Oxford), Ofcomm – other regulators? – e.g. The EU
Mobileman
Market Models
• Re-run M3I (cluster with M3I followup maybe, see MMAPPS perhaps)• Look at welfare/greed game models• Look at regulation• Look at resale, spot and futures• Look at hybrid models
• Auditability• Costs of Billing systems• Expectations, and settlements (esp. when WiFi
uses wired core!)
Mobileman
Online Auctions
• Smart Market (Varian et al) & Vickrey Auction..• Problem of Value of boundary nodes• Double Trouble of boundary to fixed network• Triple Trouble of boundary to 2 or 3 wireless
(WiFi, GPRS, Fixed)
Mobileman
Congestion $
• Loss based – hopeless!• ECN based – assumes bottleneck• Reality is congestion is in region• Need to raise price of use within region• How to distinguish local and transit users?• Needs network centric monitoring and control• Needs edge system too, since in MANET, network
control point is the end system!
Mobileman
Timescales for Congestion $
• Choices:• Packet Based
• TCP connection based
• Session Based
• Subscription Based – c.f Virtual Communities…
• Spatial Cost model?• Proportional Fairness model applied to MANET?
• Linear with distance, or relate to Tx & Rx Battery Cost and Interference model (Gupta et al!)
Mobileman
Policing Problems
• Prevention v Detection• Refund models?• Integration with existing bill/police systems• Integrate AAA security with MAC/Police?• Tamper-proof modules? (c.f. M3I edge meter
tamper-proof code!)• Risk Management (c.f. PhDs in Cambridge
TRUST and TAPAS IST projects|) – auditor rules on acceptable risks!
Mobileman
Virtual Communities (WiFi gridlets)
• Need to have a system for discovery/creation of virtual communities (all taxi drivers, all trainspotters etc)
• Join/leave/invite/evict model• Need to decide how to distribute the database of
communities and their wireless network requirements – CAN, central, full replication, or what?
• Mixture
Mobileman
Spectrum Trade Model
• Auctions• English, Dutch, Vickrey etc
• Game theoretic framework applies clearly
• Component systems• Fixed+wireless
• Neighbour ownership
• Congestion price model – dynamics etc
Mobileman
Field Theoretic Model
• ECN++ every packet carries force field info• Can be repulsion as a function of distance• Measurement of flux into/out of region:-• Can model this to match underlying network• Dynamics and static capability as well as
economics• Would be nice to build this as experiment
Mobileman
Cambridge Mobileman P2P Research Topics
• Market Models• Virtual Communities (WiFiGrids?)• Allocation Auctions• Field Theory metaphor to unify?
Mobileman
Non Topics for Cambridge
• We don’t do• Wireless MAC
• Fixing 802.11 multi-hop!
• RF propagation or aerial design