Wearable Device PAN Synchronization via Beacon and Probe Signals
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Solution Overview
Problem
Wearable devices face challenges with low power consumption, high-density scenario operation, and diverse traffic and application support, particularly in communicating within personal area networks (PANs) and between licensed and unlicensed bands.
Innovation Solution
The system architecture includes a network user equipment (nUE) and wearable user equipment (wUE) forming a PAN, with defined air interfaces (Uu-p and Uu-w) and intra-PAN interfaces (Xu-a and Xu-b) enabling low power operation, device-to-device communication, and support for diverse traffic types, using Beacon and probe signals for synchronization and access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If wearable devices use traditional communication protocols, then connectivity is achieved, but power consumption increases and battery life decreases
Solution Approach 1:
The patent changes communication parameters by implementing discontinuous reception (DRX) cycles where the wearable device alternates between active listening and sleep states. The device wakes up at specific intervals to check for messages from paired devices, then returns to sleep mode. This parameter change in the communication protocol allows the device to maintain connectivity reliability while dramatically reducing power consumption during idle periods.
Solution Approach 2:
The patent implements periodic action through scheduled wake-up cycles and beacon-based synchronization. The wearable device periodically wakes up to synchronize with network timing, check for incoming messages, and transmit data if needed. This periodic operation pattern replaces continuous communication, maintaining network availability while reducing overall power consumption by keeping the radio off during non-critical periods.
2Adaptability or versatility
If wearable devices operate in high-density scenarios with multiple devices, then connectivity options increase, but interference and connection management complexity increase
Solution Approach 1:
The patent introduces network user equipment (nUE) as an intermediary that manages connections between multiple wearable devices and the core network. The nUE handles pairing, authentication, and message routing, freeing individual wearable devices from complex connection management tasks. This intermediary layer absorbs the complexity of high-density scenario management while providing simplified interfaces to end devices.
Solution Approach 2:
The patent segments connection management into distinct functional layers: device-to-device pairing at the wearable level, nUE-level network access management, and core network service management. This segmentation allows each layer to handle specific aspects of connectivity independently, reducing overall system complexity while supporting multiple concurrent connections in high-density scenarios.
3Adaptability or versatility
If wearable devices support diverse traffic types from sensors to streaming, then application versatility increases, but communication protocol complexity increases
Solution Approach 1:
The patent implements a universal communication framework where a single protocol stack handles multiple traffic types including sensor data, messaging, and media streaming. The protocol is designed to be traffic-agnostic at lower layers while providing quality of service (QoS) differentiation through higher-layer parameters. This multi-functionality allows the same communication infrastructure to support diverse applications without requiring separate specialized protocols for each traffic type.
Solution Approach 2:
The patent applies local quality by allowing different QoS parameters to be applied to different data streams within the same connection. Sensor data can use low-power periodic transmission with relaxed timing requirements, while media streaming uses continuous high-bandwidth channels with strict latency requirements. Each traffic type receives locally optimized parameters without affecting the overall protocol structure or other concurrent streams.
4Use of energy by moving object
If wearable devices use small packet data transmission, then power consumption is reduced, but data throughput is limited
Solution Approach 1:
The patent implements dynamic transmission strategies that adapt packet size and transmission frequency based on current network conditions and application requirements. For periodic sensor data, the device uses small packets with extended intervals between transmissions to minimize radio activation time. When network conditions improve or application priority increases, the system dynamically switches to larger packets or more frequent transmissions, optimizing the balance between power consumption and throughput in real-time.
Data Source
AI summary
Embodiments of a system and method for personal area network (PAN) communication for wearable devices in a wireless network are generally described herein. In some embodiments, a wearable user equipment (wUE) includes processing circuitry and transceiver circuitry. The processing circuitry is to: configure the wUE to enter into an active state; and configure the transceiver circuitry to: scan, in response to entering into the active state, for a Beacon signal from a network user equipment (nUE); upon failing to detect the Beacon signal, send a probe signal to the nUE; and upon detecting the Beacon signal or upon receiving a response to the probe signal, connect to a PAN associated with the nUE.