Network-Assisted D2D Beacon Management for Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing network-assisted device-to-device communication systems face challenges in efficiently managing beacon resources and transmissions, leading to increased interference and complexity in scenarios with a large number of D2D capable devices, particularly in coordinating beacon acknowledgments and allocating resources effectively.
Innovation Solution
The approach involves using a network node to allocate short and efficient local device identities (LDIDs) for beacon information, minimizing beacon transmissions and listening times, and optimizing beacon resource allocation by allowing only one device to transmit at a time, with other devices listening only for relevant signals, and adjusting allocations based on device location changes and radio conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If devices transmit and detect beacon signals for peer discovery in D2D communication, then device discovery capability is improved, but interference from beacon signaling increases
Solution Approach 1:
The patent segments the beacon signaling process by introducing a two-stage discovery mechanism: first, network-assisted beacon transmission where the network coordinates beacon resources for selected device pairs; second, direct device-to-device beacon exchange only after initial pairing. This segmentation reduces overall beacon interference by limiting the scope and timing of device-generated beacons.
Solution Approach 2:
The network acts as an intermediary that coordinates and manages beacon resource allocation between devices. The network node assigns specific time-frequency resources for beacon transmission, monitors beacon signaling, and manages device pairing, thereby reducing uncoordinated interference while maintaining effective device discovery capability.
2Adaptability or versatility
If a large number of D2D capable devices are present in vicinity, then D2D link establishment possibilities increase, but beacon coordination complexity increases
Solution Approach 1:
The network performs preliminary actions by pre-allocating beacon resources and identifying suitable device pairs before actual D2D communication begins. The network node maintains information about available devices and their capabilities, preparing coordination data in advance to reduce real-time complexity when devices need to establish links.
Solution Approach 2:
The system implements feedback mechanisms where devices report their status, location, and communication needs to the network node. The network uses this feedback to dynamically adjust beacon resource allocation and device pairing decisions, optimizing link establishment while managing coordination complexity through informed, adaptive control.
3Reliability
If devices transmit beacons continuously for discovery, then discovery reliability is improved, but power consumption increases
Solution Approach 1:
Instead of continuous beacon transmission, the patent implements periodic beacon transmission scheduled by the network node. Devices transmit beacons only at assigned time intervals and frequencies determined by network coordination, maintaining adequate discovery reliability through regular periodic updates while significantly reducing power consumption compared to continuous transmission.
Data Source
Figure 1a~1b
Figure 2
Figure 3~4
AI summary
A method of a wireless communication device adapted to perform device-to-device communication is disclosed. The method comprises transmitting an indication of device-to-device communication capability to a network node, receiving one or more beacon parameters allocated to one or more second wireless communication devices adapted to perform device-to-device communication, monitoring device-to-device communication beacon signaling based on the received beacon parameters, and performing at least one radio operation task based on measurements of the monitored device-to-device communication beacon signaling. The at least one radio operation task may comprise using the measurements of the monitored device-to-device communication beacon signaling to select or re-select one of the one or more second wireless communication devices for device-to-device communication, and/or transmitting a beacon measurement report to the network node based on the monitored device-to-device communication beacon signaling. Another method of a wireless communication device comprises receiving one or more beacon parameters allocated to the wireless communication device from a network node, transmitting device-to-device communication beacon signaling based on the received beacon parameters, and receiving a beacon measurement report from the network node indicating detection of the transmitted beacon by one or more second wireless communication devices. Corresponding methods of a network node are also disclosed as well as corresponding arrangements, wireless communication devices and network nodes.