Resource Allocation in Moving and Fixed General Authorized Access Users in Spectrum Access System

Shubhekshya Basnet,Ying He,Eryk Dutkiewicz,Beeshanga Abewardana Jayawickrama

doi:10.1109/access.2019.2933043

Shubhekshya Basnet, Ying He + Show 2 more

Open Access

https://doi.org/10.1109/access.2019.2933043

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Journal: IEEE Access	Publication Date: Jan 1, 2019
Citations: 12	License type: CC BY 4.0

Affiliation: University of Technology Sydney, Ericsson (Sweden)

Abstract

Spectrum access system (SAS) is a spectrum sharing framework proposed to share the spectrum between the incumbent users and the citizen broadband radio service devices, i.e. Priority access users and general authorized access (GAA) users. In this paper, we propose an interfering angle based method for the joint resource (channel and transmit power) allocation problem to the mobile and fixed GAA users. With mobile GAA users, the set of GAA users that can hear each other will change at different time instants making the resource allocation problem more challenging. The resource allocation of fixed and mobile GAA users is done considering coexistence with priority users, as well as coexistence between mobile and fixed GAA users. For the conflict-free resource allocation to fixed and mobile GAA users, we propose to use the maximum allowed transmit power for the beams of fixed GAA users that lie within the interference range of mobile GAA users. The simulation results show improved capacity from our proposed method while satisfying a predetermined interference constraint.

Highlights

With the increasing demand in capacity, regulatory bodies have proposed spectrum sharing standards that allow the use of underutilized spectrum by the secondary users
The Federal Communication Commission (FCC) has proposed the use of the spectrum band 3550 to 3700 MHz by small cells known as citizen broadband radio services which are primarily owned by federal users and non-federal satellite services
To maximize the General Authorized Access (GAA) network capacity, we propose a conflict-free channel allocation constraint, i.e. the maximum allowed transmit power to the beams of the fixed GAA (FGAA) users that are within the carrier sensing range of the mobile GAA (MGAA) users

Summary

INTRODUCTION

With the increasing demand in capacity, regulatory bodies have proposed spectrum sharing standards that allow the use of underutilized spectrum by the secondary users. GAA users can access throughout 150 MHz. PAL and GAA citizen broadband radio service devices need to report their location coordinates along with the other transmission characteristics to SAS to protect the incumbents from the harmful interference. To reduce the interference between GAA users and to allocate multiple GAA users to the same channel in case of spectrum scarcity we propose a novel resource allocation scheme that considers the overlapping coverage area. In this work, we propose the interference angle based resource allocation method to allocate both MGAA and FGAA users with overlapping areas to the same channel at the same time. To maximize the GAA network capacity, we propose a conflict-free channel allocation constraint, i.e. the maximum allowed transmit power to the beams of the FGAA users that are within the carrier sensing range of the MGAA users.

SYSTEM MODEL

INTERFERING ANGLE BASED MAXIMUM ALLOWED FGAA TRANSMIT POWER CONSTRAINT

SELF COEXISTENCE BETWEEN GAA USERS CONSTRAINT

10: Considering all GAA are transmitting with

NUMERICAL RESULTS

CONCLUSION