D2D Communication Subframe Segmentation for Interference Management
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently performing device-to-device (D2D) communication due to overlapping subframes, which complicates signal reception from both base stations and other devices, leading to potential interference and increased implementation costs.
Innovation Solution
A method and apparatus for a user equipment (UE) that allows for D2D communication by receiving signals from another UE on one subframe and a base station on another, with the ability to report positive responses and adjust reception timing to avoid interference, using a processor and wireless communication module to manage signal processing and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If device-to-device communication is implemented in LTE system, then communication efficiency is improved, but subframe overlap causes signal interference and reception complexity increases
Solution Approach 1:
The patent segments the subframe structure by dividing it into first subframes for D2D communication and second subframes for base station communication. This temporal segmentation allows simultaneous D2D and base station communications without interference, resolving the contradiction between communication efficiency and signal interference.
Solution Approach 2:
The patent introduces a time-domain dimension solution by alternating between D2D communication subframes and base station communication subframes. This dimensional approach allows both communication modes to coexist without interfering with each other, improving overall system productivity while eliminating harmful signal overlap.
2Productivity
If overlapping subframes are used for D2D and base station communication, then resource utilization is improved, but signal reception reliability deteriorates
Solution Approach 1:
The patent segments communication resources into distinct time slots - first subframes dedicated to D2D communication and second subframes dedicated to base station communication. This segmentation maintains high resource utilization while ensuring reliable signal reception by preventing overlap between different communication types.
Solution Approach 2:
The patent implements dynamic subframe configuration where the UE can be configured to receive signals from base stations in second subframes while performing D2D communication in first subframes. This dynamic resource allocation optimizes both resource utilization and signal reception reliability based on actual communication needs.
3Adaptability or versatility
If UE receives signals from both D2D and base station simultaneously, then communication versatility is improved, but device complexity increases
Solution Approach 1:
The patent segments the reception process into separate time periods - receiving D2D signals in first subframes and base station signals in second subframes. This segmentation maintains communication versatility by supporting both modes while reducing device complexity through simplified signal processing timing.
Solution Approach 2:
The patent applies preliminary action by having the UE report its D2D communication status to the base station in advance. This allows the base station to configure appropriate reception timing, simplifying the UE's signal processing requirements while maintaining versatile communication capabilities.
Data Source
AI summary
Disclosed is a method for a device, communicating device-to-device, for receiving a signal in a wireless communication system. Specifically, the method comprises the steps of: receiving, from another device, a signal via device-to-device communication during a first sub-frame; and receiving, from a base station, a signal during a second sub-frame, wherein the signal is received via device-to-device communication when the first sub-frame and the second sub-frame overlap.