User Equipment Channel Access Method for D2D Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In device-to-device (D2D) communication, the lack of central control node allocation for resources leads to competitive access among user equipment, resulting in resource collisions during information transmission.
Innovation Solution
User equipment sends a channel access request message with a scheduling priority before transmitting information, detecting and sending information only if no conflicting request is detected or if the detected request's priority is lower, thereby avoiding resource collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user equipment uses competitive access to send information without central control node allocation, then device-to-device communication can be established, but resource collisions occur during competitive access
Solution Approach 1:
The patent applies preliminary action by having user equipment send a channel access request message before actually transmitting information. This advance notification allows other equipment to detect the request and adjust their behavior, preventing resource collisions before they occur. The channel access request serves as a preliminary action that reserves the channel for the requesting equipment.
Solution Approach 2:
The patent implements feedback by having user equipment detect channel access request messages sent by other equipment and adjust their transmission decisions based on detected priorities. This feedback mechanism creates a dynamic system where equipment continuously monitors the channel and modifies its behavior according to real-time conditions, reducing resource collisions through adaptive decision-making.
2Reliability
If user equipment sends channel access request messages with scheduling priority, then resource collision probability is reduced, but message complexity and processing overhead increase
Solution Approach 1:
The patent applies parameter changes by incorporating a scheduling priority parameter into the channel access request message. This additional parameter enables equipment to make intelligent decisions about channel access based on priority levels, reducing resource collisions. The parameter change transforms a simple presence/absence detection into a priority-based access control mechanism.
3Productivity
If user equipment detects channel access requests from other equipment and adjusts transmission based on priority, then resource allocation efficiency is improved, but detection and processing time increases
Solution Approach 1:
By sending the channel access request message in advance, the system allows other equipment to detect and process priority information before the actual data transmission begins. This preliminary action ensures that priority-based decisions are made beforehand, improving overall channel access efficiency without significantly delaying the actual information transfer.
Data Source
AI summary
Embodiments of the present disclosure relate to a communication access method and user equipment, where the method includes sending, by a first user equipment, a first channel access request message before determining to send first information, detecting, by the first user equipment in a reserved resource, a second channel access request message sent by another user equipment, and then, sending, by the first user equipment, the first information when it is determined that the second channel access request message sent by the other user equipment is not detected in the reserved resource or a second scheduling priority carried in the second channel access request message detected in the reserved resource is lower than the first scheduling priority. Therefore, competition with another user equipment for a channel resource is avoided, and a probability of a collision occurring when information is sent on a channel is reduced.