Results of the Demonstration of Shared Spectrum Access of Different - PowerPoint PPT Presentation

Results of the Demonstration of Shared Spectrum Access of Different User Groups and Changing Priorities

Authors Topi Tuukkanen, (Finnish Defence Research Agency) Heikki Kokkinen (Fairspectrum, Finland) , Seppo Yrjölä (Nokia, Finland), Jaakko Ojaniemi (Fairspectrum, Finland), Arto Kivinen (Fairspectrum, Finland), Jarkko Paavola (Turku University of Applied Sciencies)

Introduction

Army Digital Battlefield ● Armed forces’ requirements for spectrum access vary over time and location Rigid and fixed spectrum ● management schemes do not provide military any incentive to relinquish exclusive access to spectrum

Model of changing priorities

Request, Notification and Reservation Procedures LR LC LR LC LR LC Request Notification Reservation Processing of Processing of Processing of Request Notification Reservation Response Response Response

LSA with multiple Repositories and Controllers NRA LC1 LC3 Public MNO safety LR1 Spectrum Manager LR3 LR2 LC2 Military

Protocol stack for changing priorities LR LS ● In Notification protocols, an LSA-1 LSA-1 intermediate connectivity layer is JSON JSON needed, just like in email app in HTTPS HTTPS the mobile phone WebSocket WebSocket ● Websocket used in this study TLS TLS TCP TCP IP IP IEEE 802.X IEEE 802.X

Priority changes between three priority order states Peace Primary Commercial Secondary Public safety Tertiary Military Hybrid war Disaster Primary Military Primary Public safety Secondary Commercial Secondary Commercial Tertiary Public safety Tertiary Military

Experimental system setup

Demonstration system NRA Public safety Commercial LTE LTE Notification Request procedure procedure Spectrum manager Reservation procedure Military Video

Spectrum Manager architecture ● Perimeter security model LC1 UI LC3 ● Amazon EC2 VPC C++, Python, PHP ● Processing LR1 LR3 DB LR2 LC2

NRA User Interface

User interface for reservations

Simplified LTE network Management ● Off-the-shelf 2.3 GHz devices Spectrum plane Control plane manager ● UEs eNodeBs ● User plane EPC EPC ● UE S1-MME MME ● Management plane of eNB eNB S11 S1-U S-GW PDN-GW S5/S8

eNodeBs as part of demonstration network

Spectrum analyzer image of military transmitter (right) and LTE (left)

Begin Initalize channels to 2 COM priority channel 1 Any Lower COM False False False channel priority arrival assigned? free Spectrum True True True allocation Channel Assign to Evacuate True 1 free channel 1 lowest priority algorithm False Any Assign to free True Refarm from channel 1 channel to free channel channel free False Lower Put request in False priority queue assigned True Evacuate Put request in lowest priority queue End

Experimental validation of procedures with changing priorities

Literature and Requirements from stakeholders standards Construct model Validation Implement model workflow Test cases and evacuation times Update model Check model Model is Model is Valid Invalid

Denial of entry when no capacity Arrivals Spectrum Priority COM COM COM PS COM PS PS MIL MIL MIL PS COM

Initial allocation with alternative priority order Arrivals Spectrum Priority COM COM MIL PS PS COM PS COM MIL COM PS t MIL PS

Priority change under high spectrum demand Arrivals Spectrum Priority MIL PS COM MIL MIL PS PS COM MIL t

Evacuation times with Request, Notification, and Reservation procedures.

Conclusions

Summary Dynamic spectrum access system for changing priorities ● Controlled by NRA UI ● Experimental validation ● Evacuation time for Request, Notification, and Reservation procedures

Future work Future work ● Evacuation time measurements using with incumbent sensors Licensee activity sensors at the ● location of the higher priority user ● Extension of the changing priority spectrum sharing model with a better propagation model Larger number of devices, and with ● different controls, including power level, center frequency change, and bandwidth change