Dynamic Frequency Selection for Uplink Coverage
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Solution Overview
Problem
Existing 5G communication methods face limitations in uplink and downlink coverage, particularly at longer distances from the base station, where high-frequency transmission for both uplink and downlink data can lead to unbalanced coverage and slowed transmission rates, affecting internet experience.
Innovation Solution
A method where the user terminal and base station dynamically adjust transmission frequencies based on penetration loss levels, determined by the user terminal's location, using CSI and SRS, to optimize uplink and downlink coverage by selecting appropriate frequencies from predefined ranges (1.8 GHz, 2.3 GHz, and 3.5 GHz) to enhance signal penetration and data transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-frequency transmission is used for both uplink and downlink data, then data transmission rate is improved, but uplink and downlink coverage becomes unbalanced and transmission rate slows at longer distances
Solution Approach 1:
The patent applies local quality by using different transmission frequencies for uplink and downlink based on the user terminal's location. User terminals farther from the base station use low-frequency uplink transmission for better coverage, while those nearer use high-frequency transmission for higher data rates. This location-dependent frequency selection optimizes both coverage and transmission rate for each specific scenario.
Solution Approach 2:
The patent implements dynamics by dynamically adjusting the uplink transmission frequency based on real-time location information and penetration loss levels. The base station determines the user terminal's location, calculates penetration loss, and dynamically selects the appropriate frequency (low or high) for uplink transmission, allowing the system to adapt to changing conditions and maintain optimal performance.
2Reliability
If low-frequency transmission is used for uplink data, then uplink and downlink coverage is enhanced, but uplink transmission rate slows down
Solution Approach 1:
The patent applies local quality by using different transmission frequencies for uplink and downlink based on the user terminal's location. User terminals farther from the base station use low-frequency uplink transmission for better coverage, while those nearer use high-frequency transmission for higher data rates. This location-dependent frequency selection optimizes both coverage and transmission rate for each specific scenario.
Solution Approach 2:
The patent changes the transmission frequency parameter dynamically based on location and penetration loss conditions. By switching between low-frequency and high-frequency uplink transmission modes according to the user terminal's distance from the base station and environmental penetration loss, the system optimizes the balance between coverage and transmission rate.
Data Source
AI summary
A method for enhancing uplink and downlink coverage is applied in a base station for the benefit of a terminal user. The base station receives from the user terminal an uplink scheduling request and GPS location. In response, the base station determines a penetration loss level of the GPS location, the penetration loss level being attenuation of signals when signals penetrate an outer structure of a building. The base station further determines a transmission frequency of an uplink according to the penetration loss level which is set by reference to base station tables of penetration loss for buildings and areas within its coverage area, generates a scheduling strategy comprising the transmission frequency of the uplink, and sends the scheduling strategy including the transmission frequency of the uplink to the user terminal for use in intercommunication.