D2D Channel Hopping Based on Delay Requirements
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Solution Overview
Problem
In device-to-device (D2D) communication, existing methods face challenges in efficiently managing channel allocation and synchronization for multiple sessions, leading to inefficient resource utilization and increased power consumption due to the lack of defined rules for channel hopping in infrastructure-free environments.
Innovation Solution
A D2D communication method based on channel hopping, where devices determine a hopping sequence based on delay requirements to optimize resource allocation and reduce power consumption by autonomously switching between channels, allowing for simultaneous communication with multiple devices without the need for a server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If devices communicate directly without server infrastructure in D2D environment, then transmission delay is reduced and transmission power is saved, but resource allocation and interference avoidance become more complex
Solution Approach 1:
The patent changes the communication parameter from static channel allocation to dynamic channel hopping, where devices switch between multiple channels according to a predetermined sequence. This resolves the contradiction by enabling direct D2D communication with reduced delay while managing resource allocation complexity through structured channel switching patterns.
Solution Approach 2:
The patent implements periodic channel hopping where devices transition between channels at regular intervals defined by a hopping sequence. This periodic action allows direct communication with low latency while systematically managing resource allocation and interference avoidance through predictable, repeating patterns.
2Adaptability or versatility
If multiple D2D sessions are established without defined channel hopping rules, then communication versatility is improved, but channel allocation efficiency deteriorates
Solution Approach 1:
The patent segments the communication spectrum into multiple channels and assigns different hopping sequences to different D2D sessions. This allows multiple sessions to operate simultaneously with improved versatility while maintaining channel allocation efficiency through structured segmentation of radio resources.
Solution Approach 2:
The patent introduces dynamic channel hopping where devices adaptively switch between channels based on predetermined sequences. This enables versatile multi-session communication while improving channel allocation efficiency through dynamic resource utilization that responds to varying communication needs.
3Extent of automation
If devices autonomously perform channel hopping, then device independence is improved, but synchronization difficulty increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring hopping sequences and channel assignments before D2D communication begins. Devices autonomously perform channel hopping according to these predetermined patterns, achieving device independence while simplifying synchronization through advance planning of channel transitions.
Solution Approach 2:
The patent incorporates feedback mechanisms where devices monitor and report channel conditions, enabling autonomous channel hopping while maintaining synchronization. The feedback loop allows devices to independently adapt to channel variations while the central coordinator adjusts hopping sequences to maintain synchronization across the network.
Data Source
AI summary
A device to device (D2D) communication method on the basis of channel hopping may comprise the steps of: a first terminal determining a delay requirement for first link-based D2D communication with a second terminal; the first terminal determining a hopping sequence for first link-based first D2D communication on the basis of the delay requirement; and the first terminal performing first D2D communication with the second terminal on the basis of the hopping sequence, wherein the delay requirement may be a minimum time interval during which data transmission or reception for the first D2D communication is made between a PHY layer and an MAC layer of the first terminal and a PHY layer or an MAC layer of the second terminal.