1. VoIP over Wireless Networks Router Access Point (AP) AP INTERNET

2. VoIP over Wireless Networks Problems – Quality of Service (QoS) –Layer 2 (MAC Layer) Handoff –Layer 3 (IP Layer) Handoff

3. VoIP over Wireless Networks Handoff Router Access Point (AP) AP Subnet A Subnet B L2 HandoffL3 Handoff

4. VoIP over Wireless Networks Problems – Quality of Service (QoS) –Layer 2 (MAC Layer) Handoff Selective Scanning & Caching –Layer 3 (IP Layer) Handoff Fast L3 Handoff using temp IP Cooperative handoff –Limited Capacity Dynamic PCF (DPCF) Adaptive Priority Control (APC) –Call Admission Control Virtual Traffic Generation