Next Generation Mesh Architectures For Dense City Wide

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Next Generation Mesh Architectures For Dense City Wide VOIP Deployment © 2002 -2005 Mesh.

Next Generation Mesh Architectures For Dense City Wide VOIP Deployment © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 1

Introduction Target Applications Ø Ø Ø Metro scale Video and VOIP Public Safety (Video

Introduction Target Applications Ø Ø Ø Metro scale Video and VOIP Public Safety (Video Surveillance) Military Deployments in Progress Ø Ø China (Video and Data) Ghana (VOIP and Data) Brazil (Video and Data) UK ( Video and VOIP) © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 2

P-to-MP Doesn’t Work in the Big City q For ubiquitous Vo. Wi. Fi at

P-to-MP Doesn’t Work in the Big City q For ubiquitous Vo. Wi. Fi at street level, Mesh is the only way q Point-to-Multipoint has too many blind spots © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 3

Ubiquitous Coverage for City-wide Mesh q “Concrete Canyon” coverage requires a mesh node at

Ubiquitous Coverage for City-wide Mesh q “Concrete Canyon” coverage requires a mesh node at every intersection M M M q q Short range Typical city block is 300 -500 ft. Mesh must support many hops © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 4

Single Radio Mesh does not scale © 2002 -2005 Mesh. Dynamics, Inc. -- Patents

Single Radio Mesh does not scale © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 5

Single Radio Mesh does not scale © 2002 -2005 Mesh. Dynamics, Inc. -- Patents

Single Radio Mesh does not scale © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 6

Mesh Architecture Comparison for Vo. IP Structure Mesh. TM with Multi-Radio, Multi-Channel Backhaul 1

Mesh Architecture Comparison for Vo. IP Structure Mesh. TM with Multi-Radio, Multi-Channel Backhaul 1 -Radio Ad Hoc Mesh To Ethernet link AP 0 A-H Vo. IP packets contend with service radios & other backhaul links Vo. IP packets don’t contend with service radios or other backhaul links AP AP A-H AP © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 7

Mesh Architecture Comparison for Vo. IP Structure Mesh. TM with Multi-Radio, Multi-Channel Backhaul “

Mesh Architecture Comparison for Vo. IP Structure Mesh. TM with Multi-Radio, Multi-Channel Backhaul “ 1+1” Mesh To Ethernet link AP 0 Vo. IP packets contend with other backhaul links AP Vo. IP packets don’t contend with service radios or other backhaul links AP AP © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 8

Vo. IP Packets are Inefficient over Wi. Fi q Typical Data Packet = 1500

Vo. IP Packets are Inefficient over Wi. Fi q Typical Data Packet = 1500 bytes (1. 44 m. S, incl. 4 m. S ovhd) Overhead q Data Vo. IP Packet (G. 711 Codec) = 230 bytes (. 56 m. S, incl. 4 m. S ovhd) Overhead q Data Vo. IP Packet (G. 729 Codec) = 90 bytes (. 46, incl. 4 m. S ovhd) Data Overhead q Mesh backhaul path must have capacity over many hops to support large quantity of inefficient packets. © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 9

Vo. IP Packets Share the Medium q Vo. IP packets compete for transmission in

Vo. IP Packets Share the Medium q Vo. IP packets compete for transmission in 20 m. S window Source: Cisco Systems © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 10

Structured Mesh. TM Vo. IP vs Cellular 425 simultaneous Vo. IP conversations System Delivers:

Structured Mesh. TM Vo. IP vs Cellular 425 simultaneous Vo. IP conversations System Delivers: q q q 17 simul conv/node G. 729 8 Kb Codec 802. 11 b service radio 425 simul conv per 25 sq blocks 17 17 17 Cost-per-minute-per-user =100 x over cellular 17 17 17 Ø 0. 05 cents for Structured Mesh 17 17 17 Ø 5 cents for cellular 17 17 17 © 2002 -2005 Mesh. Dynamics, Inc. -- Patents Pending 11