Direct Device-to-Device Signaling via Virtual Subframes
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in direct device-to-device (D2D) communications, particularly in close proximity scenarios, as they often rely on indirect routing through the network, leading to increased interference and resource utilization inefficiencies.
Innovation Solution
Implementing a Direct Device-to-Device (DD2D) communication mode that allows wireless devices in close proximity to communicate directly, using allocated radio resources for both control and data channels, with mechanisms for half-duplex operations, dynamic role switching, and efficient modulation and coding schemes to minimize interference and optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If indirect routing through the network is used for device-to-device communication, then devices can communicate even when far apart, but interference increases and resource utilization becomes inefficient
Solution Approach 1:
The patent segments communication into two distinct modes: indirect network routing for distant devices and direct device-to-device routing for close proximity devices. This segmentation allows the system to select the appropriate communication path based on device proximity, thereby reducing unnecessary interference while maintaining communication versatility across different distance scenarios.
2Adaptability or versatility
If indirect routing through the network is used for device-to-device communication, then communication can be established between distant devices, but resource utilization efficiency decreases
Solution Approach 1:
The patent divides communication resources into separate pools: one for indirect network routing and another for direct device-to-device communication. By segmenting resource allocation based on communication mode, the system optimizes resource utilization efficiency for direct communications while preserving the ability to handle distant device communications through the network.
3Object-generated harmful factors
If direct device-to-device communication is implemented, then interference is reduced and resource utilization is optimized, but devices must be in close proximity
Solution Approach 1:
The patent implements dynamic role switching mechanisms where devices can dynamically change between transmitter and receiver roles based on real-time communication conditions. This dynamic adaptation allows the direct communication system to maintain efficiency while adjusting to varying proximity conditions, partially mitigating the limitation of requiring close device proximity.
4Productivity
If direct device-to-device communication is implemented, then resource utilization is optimized, but half-duplex operations require role switching mechanisms
Solution Approach 1:
The patent implements self-service mechanisms where devices autonomously negotiate and manage their transmitter/receiver roles without requiring complex centralized coordination. Each device independently monitors communication conditions and switches roles as needed, reducing the overall system complexity while maintaining optimized resource utilization through efficient half-duplex operations.
Data Source
AI summary
Described herein is a user equipment comprising a processor configured to: derive a plurality of virtual subframes from an allocation of radio resources, the virtual subframes comprising a virtual special subframe and a virtual forward link subframe wherein the virtual forward link subframe comprises a first forward link portion and the virtual special subframe comprises one or more of: a second forward link portion, and a reverse link portion; transmit, via a direct device to device (DD2D) link, to a second user equipment during the first forward link portion; and receive, via the DD2D link, from the second user equipment during the reverse link portion.