Radar-Assisted UE Tracking for High-Frequency Handover
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Solution Overview
Problem
Higher frequency mobile networks (above 20 GHz) face challenges with shadowing and dynamic blockage due to reduced scattering and diffraction, leading to frequent loss of signal connection, necessitating rapid and transparent handover processes.
Innovation Solution
The use of radar or pulse signals to track the presence and movement of User Equipment (UE) within a predetermined area, allowing for the determination of likely UE presence and direction, which assists in expediting handover procedures by informing neighboring base stations to increase beam sweep frequency in the correct direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher frequency operation (above 20 GHz) is used to enable massive peak data rates, then bandwidth and data rate are improved, but shadowing and dynamic blockage increase causing frequent connection loss
Solution Approach 1:
The system performs preliminary tracking of UE position and movement using radar signals before handover is needed. By continuously monitoring UE location and predicting future positions, the network prepares alternative base stations in advance, enabling rapid handover when shadowing occurs and maintaining connection stability while using high-frequency operation for high data rates
2Reliability
If multiple base stations are deployed to cover the same area from different angles to compensate for shadowing, then connection reliability is improved, but network complexity and infrastructure cost increase
Solution Approach 1:
Radar signals serve as an intermediary tracking mechanism that provides continuous UE position information to the network. This intermediary system enables coordinated use of existing multiple base stations, allowing them to work together more effectively for rapid handover without requiring additional infrastructure, thus maintaining connection reliability while avoiding increased network complexity
3Reliability
If beam sweep frequency is increased to track moving UEs and maintain connection, then connection reliability is improved, but power consumption increases
Solution Approach 1:
The system performs preliminary tracking of UE position and movement using radar signals before handover is needed. By continuously monitoring UE location and predicting future positions, the network prepares alternative base stations in advance, enabling rapid handover when shadowing occurs and maintaining connection stability while using high-frequency operation for high data rates
Solution Approach 2:
The radar tracking system provides continuous feedback on UE position and movement characteristics. This feedback enables the network to adjust beam sweep frequency dynamically - using lower frequency during stable conditions to save power, and increasing frequency only when movement or shadowing detection requires rapid handover, thus maintaining connection reliability while reducing overall power consumption
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces beam synchronization power consumption, enhances battery life, and accelerates handover and reconnection processes by providing targeted and frequent beam sweeps in the direction of the UE's presence, ensuring seamless communication link establishment.
Implementation Method 1
transmitting, from a transmission point of the mobile communication network, one or more pulse signals in a predetermined direction associated with the predetermined area covered by the mobile communication network; in response to transmitting the pulse signals, receiving, at the transmission point, pulse response signals associated with one or more objects
Implementation Method 2
receiving pulse response signals associated with one or more objects; wherein the pulse response signals are reflective echo signals
Data Source
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AI summary
Pulse signal transmission, such as radar pulses or the like are used in a high frequency mobile communication network as a means for determining or assisting in determining the likely presence of User Equipment (UE) and/or tracking UE in a predetermined area. As a result of determining the likely presence of UE and/or tracking UE, such information may be used to expedite either a handover or establish re-connection within the communication network. In this regard, more targeted beam sweeps or more frequent sweeps can be made in the direction where the UE has been determined to likely be present in order to hasten the establishment of the communication link between the targeted transmission point, such as a Base Station (BS) or the like, or reconnection to the existing transmission point.