BANDWIDTH EFFICIENT CELLULAR BACKHAUL SOLUTIONS

LinkIPTM Cellular Solution Overview • Backhaul solutions for CDMA, 2G & 3G GSM networks • Built-in LinkShrink data compression engine gets 2:1 or better

compression on VoIP packets • Programmable E1 interface allows selective time slot drops • Highly efficient Routed Multi-Destination (RMD) network architecture • Star, mesh, and partial mesh connectivity • LinkCast dynamically routed IP transport – satellite looks like an Ethernet

switch to the network • LinkIPs provide WAN (satellite) to LAN (local switch) bridging and routing • Combination of RMD and LinkShrink net 50% or better bandwidth savings

over SCPC • Superior to TDMA in terms of flexibility and scalability • Lower overall capital costs than TDMA or SCPC solutions

What is LinkIP? • Highly integrated link optimization and bandwidth

management solution for satellite networks • Multi application, multi-protocol LAN to WAN

router • Interfaces with a variety of devices

– Serial interface (RS-530, V.35) with satellite modems – Ethernet interface with local network equipment – E-1 interface for telephony / cellular applications

• Bandwidth savings achieved via: – LinkShrink - integrated data compression engine – LinkCast - multipoint dynamic routing over satellite – SCAN bandwidth manager

LinkIP v3 Edge • 1U Chassis in 1, 2, and 4 WAN port configurations

LinkIP v3 Core • 2U chassis w/ 4, 8, 12, and 16 WAN port configurations

LinkIP - Satellite Networking Toolbox

• Tools for streamlining data transport

• Data compression tools

• Over-the-air transport tools

• IP packet routing tools

Each LinkIP tool has specific purpose

• LinkShrink Data Compression

• LinkCast over-the-air transport

• Multi-destination Networking

• Selective Timeslot D&I

• Router packet handling

Big Bandwidth Savings

Where are LinkSat Solutions in IP Stack?

• LinkSat products operate between transport and physical layers

• Network layer – Routed Multidestination network architecture – Advanced dynamic routing in multipoint network

• Link layer – SCAN bandwidth manager – automated BOD

• Layer 1.5 – Between link and physical layers – LinkShrink data compression – LinkCast over-the-air transport

Where LinkSat Fits into the IP Stack: Between TRANSPORT and PHYSICAL Layers

Players in Other Layers • Application layer:

– WAN optimizers - acceleration, compression, QoS – Players include Expand, Riverbed, Cisco, Stampede

• Transport layer: – SCPS, TCP spoofing, image downsampling – players include: Xiplink, Skipware

• Physical (satellite) layer: – higher order modulations (8PSK, 16QAM, 32APSK) – Advanced FECs (TPC, LDPC, BCH) – Digital carrier cancellation (Carrier-in-carrier, PCMA) – Players include Comtech, Viasat, Paradise

LinkIP efficiency achieved via: • Data compression engine – LinkShrink • Low overhead transport -- LinkCast • Multi-destination routing

E1 Interface • Interfaces directly with 2G & 2.5G base stations • TDM – IP conversion: network transport is IP • Selective timeslot drop and insert

– can selectively drop timeslots at transmit end – Reconstructs full E1 frame at distant end – “QoS over TDM”

• Gracefully manages traffic spikes that exceed available bandwidth

• Can operate 2G and 3G BTS side-by-side

LinkIP 2G / 3G Interface

• E-1 Interface 2G / 2.5G BTS and BSC • “QoS over TDM” feature manages traffic during peak periods • Ethernet Interface for 3G / 4G BTS and RNC • Interfaces with legacy BTS and modem equipment • Side by side operation of 2G and 3G base stations • Second Eth port for LAN IP data transport over network

LinkShrink Data Compression • LinkSat’s proprietary lossless, low latency data compression

engine is integrated into LinkIP router • Stream compression of both packet headers and payload • Protocol independent – compresses on basis of 1’s and 0’s only • Compression ratio achieved depends on compressibility of data;

multimedia IP data can typically be compressed 30-60% • Payload compression levels can be adjusted to meet

throughput latency requirements • LinkIP can run multiple compression engines operating at

different compression levels simultaneously • E1 interface converts E1 to IP then feeds data to LinkShrink

– Drops empty time slots and reinserts them at distant end – Runs output of E1 to IP converter straight to LinkShrink

• LinkShrink with E1 interface more efficient than A-bis optimizer • Can achieve 4:1 or better overall compression of A-bis data

LinkCastTM Dynamic Routing • LinkIP’s unique layer 1.5 transport protocol enables dynamic

routing within RMD architecture • High efficiency – low overhead • “Ethernet routable without Ethernet overhead” • Multiple layer 2.5 point-to-point links are shared over each

broadcast carrier • OSPF used as interior gateway protocol, and BGP used as

exterior gateway protocol • Allows automatic rerouting of traffic if a route fails • Easy network configuration – simply add new routes into local

LinkIP and OPSF/BGP updates network routing tables • Works in concert with LinkShrink compression

LinkCast Packet Structure

Routed Multi-Destination (RMD) Network Architecture

• LinkSat’s unique, highly efficient networking scheme • Allows both MESH and STAR network configurations • Single outbound carrier transmitted from each site

– Outbound packets for entire network aggregated onto one carrier – 10-20% bandwidth savings realized through statistical

multiplexing of outbound IP traffic – Single transmit carrier - no intermod products = smaller HPA’s

• Multiple receive paths – Multiple demodulators at each site, each tuned to an outbound

carrier from another site – Enables full or partial mesh networking – LinkIP filters and routes packets at receive sites

• LinkCast - unique addressing scheme enables dynamic routing in RMD networks without Ethernet overhead

Network Architectures • STAR

– Single IP outbound carrier from hub, up to 90 mb/s – Traffic for all remote sites statistically multiplexed onto single

outbound carrier broadcast by hub – Remote sites filter packets received from hub – SCPC or MCPC return links from remote sites, up to 10 mb/s – Primarily thin route circuits, e.g. BTS-BSC links

• MESH – Single hop remote-to-remote – Each site transmits single outbound carrier – Remotes can receive transmissions of other remotes by adding

demodulator – Primarily for trunk circuits between cities (MSC-MSC, MSC-BSC)

Routed Multi-Destination Meshed Trunking

Full Mesh Spectrum

• One outbound carrier per site

• One modulator and three demodulators at each site

• LinkIP routes packets bound for its LAN and discards the rest

Routed Multi-Destination STAR

Multiple Hub Operation

RMD STAR Spectrum

• Hub and spoke network • Single outbound carrier

from hub • SCPC return channels from

remotes • Partial mesh with addition

of demod at remote

Network Configurations • Meshed Trunking

– Typically MSC to MSC trunks – Routed multi-destination architecture w/ IP transport – Single hop full mesh

• Star Thin-Route – Large BTS to BSC networks – Star network architecture – Small earth station w/ single base station @ remotes – All sites connect directly to hub

Meshed Trunking • Highly efficient full mesh networking • Bandwidth efficiency achieved via RMD architecture used

in conjunction with LinkShrink compression • Easily add new sites to mesh by adding sat demodulator to

each existing site • Efficiently transports VoIP, signaling, http, and intranet

packets within same network • Network packet types can be prioritized using LinkIP QoS

and DiffServ capabilities • Use of Softswitch in network enhances performance

– Signaling switched on different layer than VoIP – Uses SIP or MGCP gateways

Meshed Trunking w/ Softswitch

LinkIP Statistics Screenshot

LinkIP Cellular Solution Advantages

• Achieves better bandwidth efficiency and savings than competing solutions – Higher throughput than TDMA – Higher overall bandwidth savings than SCPC carrier double

illumination schemes without Power Equivalent Bandwidth problems

– Typical ROI is 3-9 months

• Superior performance and flexibility ― Outperforms TDMA for partial and full mesh networks ― Achieves true network dynamic routing for lower capex

and opex costs than SCPC

LinkXX Advantages – Value Proposition

• Minimize CAPEX expenditure - leverage existing assets by using existing modems and terminals

“Install LinkIP @ each site and double network throughput”

• Reduce occupied bandwidth - OPEX savings • Free up bandwidth for network expansion -

Increase revenues • IP-enable existing networks – offer new services for

further revenue enhancement – WiFi and WiMax Internet services – 3G data services for cellular operators

www.linksat.com

sales@linksat.com

LinkSat Inc 3010 S Potter Dr

Tempe AZ USA 85282 Ph +1 (602) 438-4717 Fax +1 (602) 438-4719