Wireless CloudGENi-FIRE WorkshopWashington D.C. September 17th, 2015

Ivan Seskar

WINLAB (Wireless Information Network Laboratory)

Rutgers Universityseskar (at) winlab (.) rutgers (.) edu

1

Basestation Architecture Evolution

Power Amplifier

Baseband

Transport

Control & Mgmt.

TraditionalDesign

Core Network

Power Amplifier

Baseband

Transport

Control & Mgmt.

Core Network

RemoteRadio Head(RRH)

BasebandUnit(BBU)

CurrentDesign

Cloud Radio Access Network (CRAN)

Power Amplifier

Power Amplifier

Power Amplifier

Baseband

Transport

Control & Mgmt.

Baseband

Transport

Control & Mgmt.

Baseband

Transport

Control & Mgmt.

Core NetworkCore Network

FRONTHAUL

• Common Public Radio Interface (CPRI)

• Open Base Station Architecture Initiative (OBSAI)

• Open Radio Equipment Interface (ETSI-ORI)

BACKHAUL

• S11,R4,R6

CRAN Requirements

WiFi:• Shortest SIFS interval = 10 μsLTE (20 MHz LTE, 2x2 MIMO): • CPRI fronthaul - 2.5 Gbps with BER < 10e-12• Phase error of ± 1.5 - 5 μs• Frequency error: ±50 ppb• Delay < 3 ms total (0.1- 0.2 ms on fronthaul)• Jitter < 65 ns

Multiple 1000 of GOPS (for a large system)

WINLAB

5G Wireless: Industry Concepts for 5G

Several industry white papers on 5G released in 2015:

Ref: Ericsson 5G White Paper, Feb 2015Ref: Nokia 5G White Paper, Feb 2015

Multi-purpose network with significant performance improvements Machine-to-machine and IoT applications (some requiring low latency)

Densely deployed wireless networks with cloud integration

Ref: Nokia 5G White Paper, Feb 2015

4

WINLAB

5G Wireless: Technical Challenges

Faster CellularRadios Access

~1-10 Gbps~1000x capacity

Low-Latency/Low-Power

Access NetworkFor Real-Time IoT

New Spectrum & DynamicSpectrum Access

Next-Gen Mobile

Network

Wideband PHY

Massive MIMO

Cloud RAN arch

mmWave (60 Ghz)

Multi-Radio access

HetNet (+WiFi, etc.)

…

Custom PHY for IoT

New MAC protocols

RAN redesign

Light-weight control

Control/data separation

Network protocol redesign

….

60 Ghz & other new bands

New unlicensed/shared spectrum

Dynamic spectrum access

Spectrum sharing techniques

Non-contiguous spectrum

Network/DB coordination methods

….

Mobile network redesign

Convergence with Internet

Clean-slate Mobile Internet

Software Defined Networks

Open wireless network APIs

Cloud services & computing

Edge cloud/fog computing

Virtualization, NFV

CRAN Expanded

OBRIT Extension: Proposal

OBRIT Extension: Current

• 40 USRP X310s – Available FPGA resources:

– 2 x UBX-160 (10 MHz - 6 GHz RF, 160 MHz BB BW)– 2 x 10G Ethernet for fronthaul/interconnect– Four corner movable mini-racks (4 x 20 x 20 -> 1 x 80 x 80)

• > 500+ GPP Cores (?) • 4 x 48 port 10G switches with 40G TOR switch

Resource Type Number

DSP48 Blocks 58K

Block Rams (18 kB) 14K

Logic Cells 7.2M

Slices (LUTs) 1.5M

Clock Distribution

• What is our programming model for this mixed environment?

• How much initial work do we as a community need to do in order to get average experimenter involved?

• What other communities we need to get involved (i.e. who will help with virtualized real-time platform)?

• How can we move these highly-programmable platforms “outside” of the testbed?

Open Issues