Base Station Beam Avoidance Using User Satisfaction Assessment
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Solution Overview
Problem
The existing coordinated beamforming (CBF) technology in LTE systems increases the probability of performance deterioration for user equipment (UE) on which beam avoidance is performed in coordinated cells, as it does not adequately assess user satisfaction with the service before adjusting transmit weights.
Innovation Solution
A method where a base station determines if the user is satisfied with the service of UE in an adjacent cell by considering video service parameters such as video bitrate, buffer duration, and playback status, and only adjusts the transmit weight if the user is satisfied, thereby reducing the impact on performance in coordinated cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If beam avoidance is performed on UE in coordinated cell to suppress interference on benefited UE, then interference suppression is improved, but performance deterioration probability of impacted UE increases
Solution Approach 1:
The base station performs preliminary assessment of user satisfaction with the service before executing beam avoidance. It determines whether the user is satisfied with the service of the impacted UE by checking video service parameters (video bitrate, buffer duration, playback status) prior to adjusting transmit weights, thereby avoiding unnecessary performance deterioration.
Solution Approach 2:
The system incorporates feedback mechanisms by continuously monitoring user satisfaction status and video service parameters. The base station uses this feedback information to dynamically decide whether to perform beam avoidance, adjusting transmit weights only when necessary and based on real-time service quality assessment.
2Object-affected harmful factors
If transmit weight of second UE is adjusted to implement beam avoidance, then interference on first UE is suppressed, but service quality of second UE may deteriorate
Solution Approach 1:
The base station assesses user satisfaction and video service status before adjusting transmit weights. It determines whether the user is satisfied with the service of the second UE (impacted UE) by checking video bitrate, buffer duration, and playback status prior to implementing beam avoidance, preventing unnecessary service quality deterioration.
Solution Approach 2:
The system dynamically adjusts transmit weights based on real-time assessment of user satisfaction and video service parameters. The base station changes transmission parameters selectively, only when the assessment indicates that beam avoidance is necessary and will not cause unacceptable service quality deterioration.
Data Source
AI summary
A beam avoidance method comprises: determining, by a first base station, that first UE transmitting a service on a currently scheduled RB is benefited UE, where a cell in which the first UE is located is a first cell; determining, by the first base station, whether a user is satisfied with a service that is of second UE and that is transmitted on the currently scheduled RB, where a cell in which the second UE is located is a second cell, and the second cell is a cell adjacent to the first cell; and adjusting, by the first base station, a transmit weight of the second UE if the user is satisfied with the service that is of the second UE and that is transmitted on the currently scheduled RB.