In-Building Wireless – Making Wi-Fi Hi-Fi

In-Building Wireless – Making Wi-Fi Hi-Fi

In-Building Wireless – Making Wi-Fi Hi-Fi

Narayan Menon, CTO / EVP Engineering & Founder

manage | optimize | monetize

IEEE Workshop on In-Building

Wireless Solutions

New Brunswick, New Jersey

Nov 14, 2016

About XCellAir

Vision

Enable broad and large scale deployment of HetNets for wireless service providers by delivering optimization, automation and analytics

Focus

Provide Wi-Fi Assurance for service provider Wi-Fi networks to ensure high

Quality of Experience

Industry Veterans with Proven

Track Record

Executive team brings over 100 years of combined telecommunications expertise, recognized experts and thought leaders

© 2016 XCellAir, Inc. All rights reserved.

2

Wi-Fi – Well Entrenched, But Best-Effort Service

Wi-Fi - most heavily used data service, in nearly every mobile device

Today, primarily a connectivity service

Unmanaged in most use cases

Best effort, no QoE guarantee

Continually evolving

802.11ad

6757 Mbps

@60 GHz

802.11ay

802.11ac

6933 Mbps

@ 5 GHz

802.11ax

1990

802.11

2 Mbps

@ 2.4 GHz

802.11b

11 Mbps

@ 2.4 GHz

802.11a

54 Mbps

@ 5 GHz

802.11g

54 Mbps

@ 2.4 GHz

2009

802.11n

600 Mbps

@ 2.4/5 GHz

2016

© 2016 XCellAir, Inc. All rights reserved.

4

Key In-Building Use Cases

Single Family Home Multi-Dwelling Unit Small/Medium Business

Enterprise Venue/ Hotspot

© 2016 XCellAir, Inc. All rights reserved.

4

Moving Ahead - Multiple Vectors of Wi-Fi Evolution

Massive Densification

“Wi-Fi First” strategies

Community Wi-Fi

Multi-Dwelling & Multi-AP deployments

New Services over Wi-Fi

Voice over Wi-Fi

Video

Internet of Things (IoT)

Wi-Fi is the connection today, and will play central role in IoT

Home automation

Security

© 2016 XCellAir, Inc. All rights reserved.

5

Challenges Impeding High QoE over Wi-Fi

CONGESTION

• Dense deployments

• Managed & unmanaged access points

• High latencies, poor QoE

COVERAGE

• Larger homes

• Dead zones with poor coverage

• Poor performance

• Mobility is a key requirement

AIRTIME MGMT

• Bandwidth allocation across users, service types

• Airtime fairness for

Community Wi-Fi deployments

VISIBILITY

• Operators have little visibility into issues, root causes

• Need for operational and business level analytics

• Proactive action

© 2016 XCellAir, Inc. All rights reserved.

6

Congestion a Key Issue in Dense Deployments

Wi-Fi works on Listen-Before-Talk basis

Devices check to see if medium is free, before transmitting

Devices wait until medium is free

Onus is on each device to obey etiquette

Managed & unmanaged networks

Unmanaged APs using same channels

In a dense environment, you can have congestion

Due to excessive resource contention

Long lines of users “waiting to talk”

High latencies, sub-optimal QoE

© 2016 XCellAir, Inc. All rights reserved.

7

Solving Congestion with Smart RF Management

Coexistence rules, obeying the etiquette

Avoid “stomping” on other users

Listen Before Talk, Dynamic Frequency

Selection, Discontinuous Transmission

Radio Resource Management improves service quality by order-of-magnitude

Minimize / mitigate interference and congestion

Allocate right resource to right device at right time

Dynamical channel management

Band steering

Continuous optimization

Channel Management

Band Management

© 2016 XCellAir, Inc. All rights reserved.

8

Weak In-Home Coverage Poor Service

Pervasive in single-family home & enterprise scenarios

Dead spots with weak coverage

Influenced by building layout, construction materials

Bigger issue in 5GHz band (lower range)

Some client devices handle poor coverage betterthan others

Affects ability to exploit available capacity

Coverage is the “access ramp to the capacity highway”

Poor coverage => low instantaneous bit rates

Means application takes much longer to send its data

Low-rate clients affect performance of good clients

Combined with congestion, can be a killer!

© 2016 XCellAir, Inc. All rights reserved.

9

Solving Coverage with Multi-AP Deployments

Extender Topology

Primary AP + Extender APs

Primary AP becomes the broadband gateway

Primary – Extender backhaul can be wired (e.g.

MoCA, Powerline, Ethernet)

Or can use Wi-Fi

Mesh Topologies

Multiple APs in mesh arrangement with one AP acting as gateway

Wireless (Wi-Fi) backhaul

Key issues: sharing of Wi-Fi channels across multiple links and multi-hop data transfer

Complex and expensive for residential scenarios, possible option for large enterprises

Inter-AP Client Mobility is

Critical in Multi-AP

Deployment

© 2016 XCellAir, Inc. All rights reserved.

5

Airtime Management – Prioritizing to Deliver QoE

Prioritize based on traffic type

Voice, video, others

Based on User or Home

Prioritize users/homes based on SLA

Client Device

Prioritize for specific devices in a home

SSID

Key for Community Wi-Fi service

E.G. give prioritize private over public user

Not easy to do with Wi-Fi

Some standards support (802.11e), proprietary solutions beyond that

802.11ax will help address this more completely

TRAFFIC

TYPE

USER/

HOME

AIRTIME

MANAGEMENT

CLIENT

DEVICE

SSID

© 2016 XCellAir, Inc. All rights reserved.

10

For Service Provider - Visibility into Wi-Fi

Network is Critical

Assess Network Performance against Targets, Locate

& Address Issues, Control QoE to User

Performance analysis, diagnosis, troubleshooting

Identify where the issues, faults, usage are

Control per

SLA, Policy,

Targets

Data

Extraction

Data

Analysis

Data

Abstraction

Business

Analytics

RAW AP DATA

Performance Dashboards

• Network level

AP level

Client level

Channel level

Fault management

Operational Analytics

• Congestion

Coverage

Peak usage hours

Top N Worst Aps

Business Analytics

Operational Visibility

Business Visibility

Resource Optimization

• Monetization

© 2016 XCellAir, Inc. All rights reserved.

10

XCellAir Delivers Wi-Fi Assurance

Cellular

Rigor

Wi-Fi

Flexibility

Cellular Sensibility

Coordination, Optimization, QoE-awareness

On top of Wi-Fi style self-organization

Plug-n-play, automation, simplicity

With scalability and high reliability

© 2016 XCellAir, Inc. All rights reserved.

13

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