Terminal Capability Reporting for 5G Supplementary Uplink
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Solution Overview
Problem
In 5G networks, especially with high-frequency bands, uplink coverage is limited, leading to inconsistent radio frequency capabilities in terminals, which complicates correct data scheduling by network devices.
Innovation Solution
A method and device for reporting terminal capability, where a terminal-side equipment determines and reports a frequency band pairing combination, including a primary uplink and downlink frequency range and supplementary uplink frequency ranges, to a network-side equipment, enabling accurate data scheduling based on terminal capability information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-frequency band is used for uplink transmission, then data transmission speed is improved, but uplink coverage capability deteriorates
Solution Approach 1:
The patent segments the uplink transmission by dividing it into two parts: high-frequency band for speed-critical data and low-frequency band for coverage-critical data. The terminal device transmits different types of data or different portions of data through different frequency bands simultaneously, thereby achieving both high speed and wide coverage.
Solution Approach 2:
The patent merges the advantages of high-frequency and low-frequency bands by combining their transmission capabilities. The terminal device utilizes both frequency bands together, where high-frequency band provides speed advantage and low-frequency band provides coverage advantage, achieving a synergistic effect that overcomes the limitations of using either band alone.
2Adaptability or versatility
If carrier aggregation is used to activate secondary carriers, then frequency utilization is improved, but configuration delay and complexity overhead increase
Solution Approach 1:
The patent enables the terminal device to autonomously select and switch between frequency bands based on its own capability information and current transmission needs, without requiring complex network-side configuration and activation procedures. This self-service approach eliminates configuration delay and reduces signaling overhead while maintaining flexible frequency utilization.
Solution Approach 2:
The patent performs preliminary action by pre-configuring the terminal device with capability information indicating support for supplementary uplink frequency bands. This advance preparation allows the network to directly utilize the terminal's multi-band capability without requiring runtime configuration or activation procedures, thereby reducing complexity and delay.
3Reliability
If a terminal works at multiple uplink frequencies, then network coverage is improved, but terminal power consumption increases
Solution Approach 1:
The patent applies local quality by assigning different frequency bands to different transmission scenarios based on local conditions: low-frequency band is used when coverage is needed (such as at cell edge), while high-frequency band is used when speed is prioritized (such as at cell center). This localized frequency selection optimizes both coverage and power efficiency by avoiding unnecessary multi-band operation.
Data Source
AI summary
A method and device for use in reporting terminal capability, the method including: determining a frequency band pairing combination in an operating band that is supported by a terminal-side equipment, the frequency band pairing combination being composed of a first frequency band that consists of a first uplink operating frequency range and a first downlink operating frequency range as well as a supplementary uplink frequency band that consists of one or more second uplink frequency ranges; determining terminal capability information of the terminal-side equipment within the frequency band pairing combination, the terminal capability information including a first frequency band identifier, terminal uplink capability information and terminal downlink capability information that correspond to the first frequency band, as well as a supplementary uplink frequency band identifier and terminal uplink capability information that corresponds to a supplementary uplink frequency band; reporting the terminal capability information to a network-side equipment.