UE-Specific RF Bandwidth Adaptation for 5G Power Efficiency
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Solution Overview
Problem
Current 5G base station designs face inefficiencies in supporting UEs with single wideband carriers and intra-band carrier aggregation over the same contiguous spectrum, leading to increased power consumption and reduced bandwidth efficiency, especially for low-data-rate services.
Innovation Solution
The implementation of a multi-anchor structure within a contiguous RF spectrum, where synchronization signal anchors are configured to facilitate UE initial access and bandwidth adaptation, allowing for switching between different RF configurations based on adaptation signals, thereby optimizing bandwidth usage and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If carrier aggregation is used to increase data bandwidth, then data bandwidth requirement is met, but transition time increases and transmission efficiency decreases
Solution Approach 1:
The patent segments the contiguous spectrum into multiple virtual carriers, allowing the system to operate on a single physical carrier while logically dividing the bandwidth. This avoids the need to activate multiple physical RF chains, thereby reducing transition time while still providing large data bandwidth through virtual carrier aggregation.
Solution Approach 2:
The patent introduces dynamic RF bandwidth adaptation where the UE can switch between different RF bandwidth configurations based on service requirements. This allows the system to dynamically adjust the active bandwidth, reducing transition time when bandwidth needs change while maintaining the capability for large data transmission when needed.
2Quantity of substance
If wideband operation is used to provide large spectrum resource, then data transmission capacity is improved, but power consumption increases
Solution Approach 1:
The patent implements UE-specific RF bandwidth adaptation that allows dynamic switching between wideband and narrowband operations. The UE can utilize the full wideband spectrum when high data rate services are required, and switch to a narrower bandwidth for low-data-rate services, thereby reducing power consumption while maintaining access to large spectrum resources when needed.
Solution Approach 2:
The patent applies different operational modes to different UEs based on their specific service requirements. Not all UEs are forced to operate in wideband mode; instead, each UE can be configured with an appropriate bandwidth level, allowing the system to optimize power consumption locally for each user while still providing wideband capability where needed.
3Device complexity
If single carrier operation is used for large continuous spectrum, then control overhead is reduced and trunking gains are improved, but not all UEs require large channel bandwidth
Solution Approach 1:
The patent introduces dynamic RF bandwidth adaptation that allows UEs to switch between different bandwidth configurations based on service requirements. This maintains the simplicity of single-carrier operation while adding the flexibility to adapt bandwidth, reducing control overhead for UEs with low data needs while providing full bandwidth capability when required.
Solution Approach 2:
The patent creates a universal framework that supports both wideband and narrowband operations within a single carrier structure. The system can serve different UE types and service requirements using the same physical carrier, with the ability to dynamically adjust the active bandwidth, thereby achieving both control efficiency and adaptability.
Data Source
AI summary
In one novel aspect, a plurality of synchronization signal (SS) anchors within a block of a contiguous spectrum is configured in a wireless network. Each SS anchor is a primary SS anchor or a secondary SS anchor. The UE performs an initial access by detecting a first primary SS anchor and receives one or more virtual carrier configurations with corresponding SS anchors within the block of the contiguous spectrum. In another novel aspect, the UE performs an initial access through a first RF band with a first bandwidth and a first center frequency, receives a switching signal to switch from the first RF band to a second RF band with a second bandwidth and a second center frequency, the second bandwidth is different from the first bandwidth, and performs a RF bandwidth adaptation from the first RF band to the second RF band based on the adaptation signal.