UE Frequency Range Reporting for Analog Beamforming Codebook Reuse
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing wide bandwidth operations for beamforming, particularly in millimeter wave bands, due to limitations in analog beamforming codebooks and increased latency and power constraints, which affect communication reliability and latency.
Innovation Solution
User equipment (UE) reports a range of frequencies outside its operational bandwidth to the base station, indicating compatibility with existing analog beamforming beam weights, allowing for extended bandwidth operation without re-loading new codebooks, thereby reducing latency and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE operates over a wide bandwidth using existing analog beamforming codebooks, then communication reliability is improved, but the operational bandwidth is limited by the codebook design frequency
Solution Approach 1:
The patent changes the parameter of beamforming weight compatibility by determining whether frequencies outside the operational bandwidth are compatible with existing beam weights. This allows the system to extend bandwidth usage without changing the physical codebook structure, resolving the contradiction between reliability and bandwidth adaptability
Solution Approach 2:
The patent makes the existing analog beamforming codebook multi-functional by enabling its use not only at the design frequency but also at frequencies outside the operational bandwidth, provided compatibility conditions are met. This universality allows one codebook to serve multiple frequency ranges, improving both reliability and bandwidth adaptability
2Adaptability or versatility
If new analog beamforming codebooks are loaded for frequencies outside the operational bandwidth, then bandwidth coverage is improved, but latency increases due to codebook reloading
Solution Approach 1:
The patent performs preliminary compatibility determination to check whether existing beam weights can be used for frequencies outside the operational bandwidth. By checking compatibility beforehand and reusing existing codebooks when possible, the system avoids the time-consuming process of loading new codebooks, thus reducing latency while maintaining bandwidth coverage
Solution Approach 2:
The patent copies and reuses existing analog beamforming beam weights for frequencies outside the operational bandwidth when compatibility is confirmed. Instead of creating or loading new codebooks, the system replicates the use of existing weights across frequency ranges, eliminating the latency associated with codebook reloading
3Adaptability or versatility
If analog beamforming codebooks are frequently updated to support wide bandwidth operation, then frequency coverage is improved, but power consumption increases
Solution Approach 1:
The patent enables the system to self-determine compatibility of existing beam weights with frequencies outside the operational bandwidth. By autonomously checking whether current codebooks can be reused without external intervention or frequent updates, the system reduces the power consumption associated with codebook management while maintaining broad frequency coverage
Solution Approach 2:
The patent changes the operational parameter from frequent codebook updates to compatibility-based codebook reuse. By determining whether existing weights are compatible with target frequencies and reusing them when possible, the system extends frequency coverage without the power-intensive process of frequent codebook updates
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a base station, an indication of a range of frequencies outside an operational bandwidth of the UE based at least in part on the range of frequencies being compatible with one or more sets of analog beamforming beam weights associated with the operational bandwidth. The UE may communicate, with the base station, based at least in part on transmitting the indication of the range of frequencies outside of the operational bandwidth of the UE. Numerous other aspects are provided.