Frequency Component Restrictions for Carrier Aggregation
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Solution Overview
Problem
Current wireless communication systems face challenges in optimizing frequency component combinations for carrier aggregation and frequency hopping, particularly at higher frequencies like FR4, where beamforming performance loss occurs due to limited hardware resources, leading to suboptimal configurations for carrier aggregations and frequency hops.
Innovation Solution
Implementing frequency component restrictions by a scheduling entity to limit which combinations of frequency components can be carrier aggregated or frequency hopped, based on information from user equipment (UE) such as prioritization, hardware capabilities, and dual connectivity preferences, to maintain optimal beamforming performance at higher frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency components are combined for carrier aggregation or frequency hopping at higher frequencies, then communication capacity and spectral efficiency are improved, but beamforming performance loss occurs due to limited hardware resources
Solution Approach 1:
The patent changes the parameter of frequency component combinations by receiving indications from the UE about which frequency components should be restricted from combination. The scheduling entity then applies these restrictions when configuring carrier aggregation or frequency hopping, thereby adjusting the system parameters to maintain beamforming performance while still achieving communication capacity improvements from selective frequency combinations
Solution Approach 2:
The patent implements dynamic frequency component restriction where the scheduling entity receives real-time indications from the UE about hardware capabilities and preferred frequency combinations. The system dynamically adjusts which frequency components can be combined based on current conditions, UE capabilities, and beamforming requirements, rather than using fixed combination rules
2Productivity
If unrestricted frequency component combinations are permitted for carrier aggregation, then spectral efficiency is improved, but hardware resource limitations cause performance degradation
Solution Approach 1:
The patent modifies the operational parameters by restricting specific frequency component combinations based on UE-indicated preferences and hardware capabilities. This parameter adjustment allows the system to operate within hardware constraints while maintaining high spectral efficiency through carefully selected frequency combinations that the UE can actually process
Solution Approach 2:
The patent applies partial action by not restricting all frequency combinations, but only those specifically indicated by the UE as problematic. This selective restriction approach maintains maximum spectral efficiency by allowing unrestricted combinations where the UE hardware can handle them, while only applying constraints where necessary based on actual hardware limitations
3Measurement precision
If frequency component restrictions are applied to maintain beamforming performance, then beamforming accuracy is improved, but flexibility in carrier aggregation configurations is reduced
Solution Approach 1:
The patent implements dynamic adaptability where the scheduling entity receives UE preferences and hardware capability indications, then dynamically adjusts frequency component restrictions accordingly. This allows the system to be flexible with carrier aggregation configurations when the UE hardware supports it, while maintaining beamforming accuracy by applying restrictions only when the UE indicates they are necessary
Solution Approach 2:
The patent enables the UE to self-report its hardware capabilities and preferred frequency combinations through uplink indications. The UE essentially serves itself by identifying which frequency combinations work well with its specific hardware, reducing the need for network-side restrictions while maintaining beamforming performance
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a restriction on a combination of frequency components permitted to be used by the UE for carrier aggregation or frequency hopping, wherein the restriction indicates at least two frequency components that are not permitted to be combined for carrier aggregation or frequency hopping. The UE may communicate based at least in part on the restriction. Numerous other aspects are provided.