Accelerating Enterprise Small Cells

Mark Grayson Distinguished Engineer, Office of the Mobility CTO

September 2015

State of the Market - University Case Study

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§  Provide 3G indoor solution for a university campus §  Typical building with open-plan area with café, quiet study rooms &

offices, coverage area approximately 1700sqm, 500 staff/students

§  Existing indoor Cisco Wi-Fi AP deployment, using modular 36/37xx Access Points, with university delivering students free Wi-Fi connectivity

§  Focus of use case then is to enable the university to provide great 3G voice connectivity

Background

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§  3G Macro RSCP ≤ - 105dBm 99% of walk route EcNo ≤ - 7dB 98% of walk route

§  2G Macro RxLEV ≤ - 85dBm 100% of walk route

§  4G Macro RSRP ≤ - 100dBm 98% of walk route RSRQ ≤ - 9dB 50% of walk route

Indoor Situation 3G Macro

RSCP

EcNo

2G Macro

4G Macro

RxLEV

RSRP

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Working within a constrained RF environment

Macro Neighbor AP Non-Macro Neighbor AP

Design Deployment

AP 1 AP 2

AP 3

AP 4

Macro Neighbor AP Non-Macro Neighbor AP

Macro PSC limitations

Existing wall/ceiling mounted

Wi-Fi APs

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Working within a constrained IT environment

§  A single QoS enabled infrastructure serving the venue, its employees, and students

§  Traffic isolation between guest traffic, infrastructure VLAN and private enterprise traffic

§  802.1X/MAC Authentication used for Wi-Fi AP/Small Cell Access Authentication

Private (VLAN)

Public Wi-Fi Guest (VLAN)

Shared Wi-Fi Infrastructure

Enterprise SSID

Guest SSID Native Infra

VLAN L3

3G/4G Small Cell SC

VLAN

Public Small Cell (VLAN)

L2 Switch

WLC

AAA

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§  3G Small Cell RSCP ≥ - 80dBm 100% of walk route EcNo ≥ - 9dB 97% of walk route

Successful Deployment RSCP EcNo

Key Performance Indicator* Target Actual

CS PS Call Setup Success Ratio 99% 99.17% 99.84%

Dropped Call Ratio 1% 0.78% 0.80%

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§  The Wi-Fi deployment model can work successfully for deploying small cells – leveraging pre-existing Wi-Fi APs, mounting locations,..

§  Utilizing a common IT infrastructure, including PoE/LAN, keeps CapEx and OpEx costs down

§  SCF-068 recommendations are being used to deploy Small Cells in a shared enterprise LAN environment QoS, 802.1X/MAC Authentication, IP addressing, ….

§  Traffic isolation is a key enterprise requirement for security and guest access, and is working today

Key Takeaways