Decoupled Uplink Downlink Base Station Selection
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Solution Overview
Problem
Current telecommunications standards require simultaneous handoff of both uplink and downlink signals during cellular site transitions, limiting the ability to optimize each signal independently, even if different base stations offer better conditions for uplink and downlink.
Innovation Solution
Decoupling uplink and downlink signals by allowing user equipment to independently determine and establish optimal connections with different base stations for uplink and downlink, based on signal strength and path loss, enabling separate handoffs for each signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If simultaneous handoff of both uplink and downlink is required by standard, then handoff procedure is simplified and standardized, but ability to optimize each signal independently is lost
Solution Approach 1:
The patent segments the handoff procedure into two independent processes: downlink handoff and uplink handoff. The UE independently evaluates downlink signals from candidate base stations and uplink signals to candidate base stations, allowing different base stations to be selected for each direction. This segmentation enables independent optimization of each signal path while maintaining manageable complexity through standardized evaluation metrics.
2Productivity
If UE connects to same base station for both uplink and downlink, then connection management is simplified, but data throughput is limited by suboptimal base station selection
Solution Approach 1:
The patent divides the single connection management into separate downlink connection management and uplink connection management. The UE maintains independent associations: downlink connection to a base station providing optimal downlink signal, and uplink connection to a base station providing optimal uplink signal. This segmentation enables maximum data throughput by selecting the most optimal base station for each direction independently.
Solution Approach 2:
The patent changes the selection parameter from a single base station criterion to two independent criteria: downlink signal quality for downlink connection and uplink signal quality for uplink connection. This parameter change allows the system to optimize for different signal characteristics in each direction, potentially selecting different base stations based on their respective strengths.
3Reliability
If decoupled handoff is implemented, then optimal base station selection for each signal is enabled, but handoff procedure complexity increases
Solution Approach 1:
The patent segments the handoff evaluation into separate downlink evaluation and uplink evaluation processes. Each evaluation uses its own set of candidate base stations and selection criteria, ensuring that the most reliable connection is established in each direction independently. This segmentation improves connection optimality and reliability.
Solution Approach 2:
The patent implements feedback mechanisms where the UE measures and reports downlink signal qualities from multiple candidate base stations and uplink signal qualities to multiple candidate base stations. Based on this feedback, the network and UE independently determine the optimal base stations for each direction, ensuring reliable connections while managing complexity through structured feedback loops.
Data Source
AI summary
The present disclosure provides systems and methods for decoupling downlinks and uplinks between user equipment (UE) and base stations. Briefly described, in architecture, one embodiment of the system comprises UE (e.g., cellular telephones, mobile devices, etc.) for independently establishing an uplink (UL) and a downlink (DL). One embodiment of the method comprises the steps of establishing a DL to an optimal DL base station (BS), and establishing an UL to an optimal UL BS.