RADWIN, coping with the environment

Presented by Clint Sutherland

Unlicensed Spectrum getting busier. Why?

▪ WISPs using Wi-Fi in unlicensed (5.x) for last mile access.

▪ Mobile operators are entering the broadband market to

compete with xDSL type services by using unlicensed

spectrum.

▪ Mobile operators are deploying globally small-cell

backhaul (SCBH) for LTE/Pico cell deployments in

unlicensed spectrum.

▪ Large operators using unlicensed wireless for backup for

fibre services.

Small Cell Backhaul – The Need▪ “Small Cell Architecture” comprises of outdoor deployment of small/pico/

femto cells

▪ Enhancing capacity and coverage mostly in dense urban environments

▪ Majority of LTE cells would be small cells

▪ Street level deployment - NLOS backhauling

» Technological and economical challenge » Market growth barrier as well as enabler to the entire business case

NLOS Planning Tool – Innovative, Reliable,

“Workable”

9/16/2014 | Confidential Information |

4

Support all deployment scenarios

Confidential Information |

59/16/2014 |

Better Performance means Interference Mitigation

Performance: Service quality, availability, reliability, efficiency, maintainability ▪MIMO / Diversity ▪Non-interrupted Tx ▪Multiple Point to Point (intra site TDD sync) ▪Inter/Intra site TDD sync ▪Directional Antennae ▪Spectrum Viewer

What’s next?

RADWIN – MIMO/OFDM Continue

MIMO

RXTX

One data stream splits

One data stream merge

SISOTX RX

MISORXTX

SIMOTX RX

RADWIN – Diversity

RXTX

One data stream being

duplicated

One data stream being chosen

Non-interrupted TransmissionEven when encountering significant levels of interference, RADWIN radio systems maintain the transmission and link stability:   In many wireless communication solutions, such as 802.11-based systems, interference in a channel causes the radio to halt transmission until the channel qualifies for transmission again.   Obviously, this method of dealing with interference is not suitable for time-critical traffic such as VOIP streams or carrier Ethernet.   The unique air interface protocol of RADWIN radio systems is designed to continue transmission, even when encountering interference.   Combined with the other mechanisms used to mitigate interference, non-stop high quality communication is delivered even in the harshest conditions.

9RADWIN Training Center

Multiple PtP Topology (SYNCHronization)

Hub/PoP Site

TDD

Inter site TDD synchronization

▪ Inter site sync is required in dense and large scale networks

▪ Enabled using GPS timing

▪ Reduces overall network interference

▪ Improve capacity, spectrum efficiency and deployment flexibility

▪ The design of the antennas used at

each end of a wireless link affects

link budget and performance in

conditions of RF interference

▪ Directional antennas focus signal

transmission, reduce interference

effects and improves C/I ratio and

suppression of interference from

nearby radios

▪ TX pwr

Directional Antenna Design

12RADWIN Training Center

Directional Antenna Design (Cont.)

13RADWIN Training Center

RADWIN – SpectrumView▪ Spectrum Viewer is an RF survey tool that simplifies link planning &

installation by graphically displaying “cleanest” channel

▪ The tool provides the following information:

» Spectral measurement of two antennas per site

» Spectral measurement of complete sector (BS + CPE)

» Spectral power measurements in 5MHz channel resolution

» Indication of radar-free channels (for DFS bands)

Conclusion

▪ Optimise your installed base (using previous mentioned methods).

▪ Unlicensed Microwave solution is not a long term solution to avoid current congestion in lower unlicensed bands

▪ Shorter distances due to much higher frequency ▪ Great for short distance backhaul but more susceptible to

weather ▪ When using for high capacity much wider BW are used and this

implies that less radios/links can be deployed on the same high site/PoP

Conclusion Continue

▪ Are you trying to provide SLA type services or best effort service to customers?

▪ Then!!! ▪ You need to invest in technology that gives you competitive

advantage; ▪ Use premium solution with :

▪ Diversity ▪ TDD Sync ▪ Non-Interrupted Transmission ▪ Spectrum Analyzer

▪ Invest once (Not build/change/replace your network many times over)

What’s next?

▪ Vendors are driving “throughput” ▪ Vendors will continue to launch 802.11ac, but what happens when

you open up the available BW to use full capacity of link/s, Ptp/PtMP

▪ E.g. 80/160MHz (what happens to the noise floor & interference?)

What do you want from a vendor? ▪ Effective throughput!!! ▪ Ability to actually deploy 80/160MHz and avoid interference ▪ Vastly improved modulation / stability ▪ Ultimately Interference Cancellation! ▪ You want a next generation platform to be the game changer

The Future

Thank You!