Wi-Fi Signal Synchronization to DRX Cycles in FWA Devices
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Solution Overview
Problem
Fixed wireless access (FWA) devices experience congestion-caused latency and throughput issues when user equipment (UEs) attach to Wi-Fi channels, due to the differing degrees of centralization between Wi-Fi networks and cellular networks, leading to inefficient communication.
Innovation Solution
A gateway device with synchronization logic that synchronizes Wi-Fi signals with cellular signals, using Discontinuous Reception (DRX) cycles to coordinate communication between the Wi-Fi network and the cellular network, ensuring that Wi-Fi communications occur during active phases of DRX cycles, thereby reducing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Wi-Fi signals operate independently without synchronization to cellular network cycles, then Wi-Fi network autonomy and simplicity are maintained, but network congestion and latency increase due to inefficient channel access
Solution Approach 1:
The patent implements periodic DRX cycles that alternately wake and sleep the Wi-Fi device, synchronizing Wi-Fi channel access with cellular network activity patterns. This periodic operation reduces congestion by concentrating communications during active phases while maintaining simple independent Wi-Fi operation during sleep phases, thereby improving throughput without excessive complexity
Solution Approach 2:
The synchronization mechanism acts as an intermediary layer between independent Wi-Fi operation and cellular network coordination. It mediates channel access timing to align with cellular DRX cycles, reducing congestion while preserving Wi-Fi autonomy, thus improving productivity without requiring full integration complexity
2Reliability
If Wi-Fi communications occur continuously without discontinuous reception cycles, then communication availability is maintained, but energy consumption and network congestion increase
Solution Approach 1:
The patent employs periodic DRX cycles with alternating wake and sleep phases, where the Wi-Fi device periodically activates to check for messages and then enters low-power sleep mode. This maintains communication availability during wake phases while dramatically reducing energy consumption during sleep phases, resolving the contradiction between reliability and energy use
Solution Approach 2:
The synchronization mechanism ensures that useful communications occur continuously during active DRX phases while eliminating wasteful continuous monitoring during sleep phases. This maintains effective communication availability when needed while reducing overall energy consumption, balancing reliability and power efficiency
3Adaptability or versatility
If multiple UEs access Wi-Fi channels simultaneously without coordination, then network accessibility is improved, but contention and latency increase due to lack of centralized control
Solution Approach 1:
The patent synchronizes multiple UEs to access Wi-Fi channels during coordinated periodic windows aligned with cellular DRX cycles. This periodic coordination reduces contention by limiting simultaneous access attempts while maintaining broad accessibility, thereby reducing channel acquisition time without sacrificing network adaptability
Solution Approach 2:
The DRX synchronization mechanism serves as an intermediary coordination layer that organizes simultaneous UE access attempts into structured time windows. This mediates between the need for multiple UEs to access the network and the need to reduce contention, improving accessibility while reducing time loss through coordinated channel acquisition
Data Source
AI summary
A fixed wireless access device (FWA) comprises a mobile terminal, a Wi-Fi® device; and a processor. The processor is configured to: determine a next active period, for the mobile terminal, within a Discontinuous Reception (DRX) cycle of the mobile terminal; and synchronize an interval of time, for transmission or reception of data at the Wi-Fi® device, to the next active period.