INTERFERENCE AND MOBILITY MANAGEMENT IN UAV-ASSISTED WIRELESS NETWORKS

摘要

Techniques and systems are disclosed for addressing the challenges in interference and mobility management in broadband, UAV-assisted heterogeneous network (BAHN) scenarios. Implementations include BAHN control components, for example, at a controlling network node of a BAHN. Generally, a component implementing techniques for managing interference and handover in a BAHN gathers state data from network nodes or devices in the BAHN, determines a candidate BAHN model that optimizes interference and handover metrics, and determines and performs model adjustments to the network parameters, BS parameters, and UAV-assisted base station (UABS) device locations and velocities to conform to the optimized candidate BAHN model. Also described is a UABS apparatus having a UAV, communications interface for communicating with a HetNet in accordance with wireless air interface standards, and a computing device suitable for implementing BAHN control or reinforcement learning components.

主权项

1. A method of managing interference and handover in a broadband, UAV-assisted heterogeneous network (BAHN), the method comprising:
determining a candidate BAHN model from state data received from base station devices of the BAHN, wherein the candidate BAHN model satisfies one or more factors including an interference metric, a load-balancing metric, a handover failure metric, a ping-pong probability metric, and a network throughput metric, wherein the base station devices include one or more of unmanned aerial base station (UABS) devices, macrocell base station (MBS) devices, small cell base station (SCBS) devices, and Cloud-RAN (C-RAN) base station devices; depending on the candidate BAHN model, selecting at least one model adjustment from a group consisting of:
modifying a duty cycle or pattern of reduced-power resources;modifying a power reduction factor at the reduced-power resources;altering a range-expansion bias at one or more SCBS and UABS;modifying a scheduling threshold for transitioning user equipment devices to a different base station;modifying a three-dimensional location or a velocity of at least one UABS;modifying a mobility management parameter at a selected user equipment;modifying an operating state of UABS features;aggregating a plurality of component carrier bands using a carrier aggregation feature of LTE; and performing the at least one model adjustment.