UE MIMO Capability Reporting via Frequency Subband Segmentation
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Solution Overview
Problem
In wireless communication systems, especially in massive MIMO scenarios, existing technologies fail to effectively utilize the multi-antenna capabilities of User Equipment (UE) due to limitations in reporting MIMO capabilities related to the number of frequency-domain resources, leading to inefficient transmission configurations and increased signaling overhead.
Innovation Solution
A method where the UE transmits and receives radio signals using multiple RF chains across different frequency subbands, allowing for flexible configuration of transmission modes and antenna resources to improve peak rate and efficiency, while reducing signaling overhead by concentrating RF chains into fewer subbands when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple RF chains are distributed across multiple frequency subbands to improve peak rate, then the peak rate increases, but the device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the frequency spectrum into multiple subbands and assigns different RF chains to different subbands. This allows the UE to report MIMO capabilities separately for each subband, enabling selective activation of RF chains based on channel conditions and service requirements, thus improving peak rate while managing complexity through granular control
Solution Approach 2:
The patent enables dynamic configuration of RF chain activation and MIMO capability reporting based on actual transmission needs. The network can configure which subbands use which RF chains, and the UE dynamically reports capabilities only for configured subbands, reducing signaling overhead while maintaining the ability to achieve high peak rates when needed
2Ease of operation
If MIMO capability reporting is done separately for each carrier in carrier aggregation, then the reporting is simple, but massive MIMO scenarios cannot be applied effectively
Solution Approach 1:
The patent extends the traditional per-carrier MIMO capability reporting by adding a frequency subband dimension. Instead of reporting only per carrier, the UE now reports MIMO capabilities per carrier per subband. This dimensional extension enables massive MIMO support while maintaining the simplicity of structured reporting formats
Solution Approach 2:
The patent changes the granularity parameter of MIMO capability reporting from carrier-level to subband-level. This parameter change allows the system to adapt to massive MIMO scenarios where different subbands may have different channel characteristics and antenna configurations, while still using standardized reporting mechanisms
3Length of stationary object
If the system supports bandwidth exceeding single RF chain capacity, then the bandwidth capacity increases, but the number of required RF chains and associated complexity increases
Solution Approach 1:
The patent segments the wide bandwidth into multiple frequency subbands, each handled by a separate RF chain. This allows the system to support total bandwidth exceeding single RF chain capacity while managing complexity by distributing processing across multiple independent but coordinated RF chains with selective activation
Solution Approach 2:
The patent makes RF chains multi-functional by enabling them to be dynamically allocated to different frequency subbands and activated/deactivated based on service requirements. This universality allows the same RF chain hardware to serve multiple subbands at different times, reducing the total number of RF chains needed while maintaining wide bandwidth support
Data Source
AI summary
The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE transmits K pieces of first-type information through an air interface, wherein the K pieces of first-type information indicate multi-antenna related capabilities of the UE under K transmission configurations respectively; the K transmission configurations all correspond to a first frequency band combination, and the first frequency band combination comprises one or more frequency bands; numbers of parallel carriers corresponding to the K transmission configurations belong to K first-type integer sets respectively, any one of the K first-type integer sets is composed of one or more positive integers, and any two of the K first-type integer sets are different. The above method can improve the peak rate of the UE and improve the efficiency of transmission.