UE Broadcast Collision Feedback via Shared Resources
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving feedback information, particularly in environments with high collision rates, where traditional methods require central coordination and struggle with interference and resource allocation.
Innovation Solution
A method for user equipment (UE) to determine collisions in broadcast resources by detecting energy thresholds and selecting alternative shared resources using predefined mapping rules, allowing for feedback transmission and reception without central coordination, utilizing frequency and time division multiplexing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If broadcast information is transmitted in a broadcast resource region without central coordination, then communication efficiency is improved, but collision between multiple UEs increases
Solution Approach 1:
The patent implements a feedback mechanism where UEs transmit feedback information in a shared resource region to notify others of detected collisions. This allows the system to maintain decentralized operation while providing collision awareness, enabling UEs to adjust their broadcast timing and avoid collisions through iterative feedback loops.
Solution Approach 2:
The patent introduces a sensing phase before actual broadcast transmission, where UEs detect whether other UEs are currently transmitting in the broadcast resource region. This preliminary detection action allows UEs to postpone their transmission if collision is detected, preventing harmful overlaps before they occur.
2Device complexity
If a shared resource region is used for feedback transmission, then device complexity is reduced, but interference in the shared resource increases
Solution Approach 1:
The patent divides the communication system into distinct functional regions: a broadcast resource region for one-way broadcast transmission and a shared resource region for bidirectional feedback. This segmentation allows each region to serve its specific purpose while minimizing interference between different types of transmissions.
Solution Approach 2:
The patent implements periodic sensing and feedback cycles where UEs periodically check for collisions and transmit feedback information at scheduled intervals. This periodic operation allows the shared resource to be reused over time while managing interference through time-division multiplexing of feedback transmissions.
3Measurement precision
If energy detection threshold is set high to reduce false alarms, then false alarm rate decreases, but collision detection capability deteriorates
Solution Approach 1:
The patent employs different energy detection thresholds for different purposes: a higher threshold for initial collision detection to minimize false alarms during the sensing phase, and a lower threshold for confirmation during feedback processing. This adaptive parameter adjustment allows the system to balance between false alarm reduction and reliable collision detection.
Solution Approach 2:
The patent performs preliminary energy detection with a high threshold to quickly rule out obvious non-collision scenarios, then applies more sensitive detection only when necessary during the feedback phase. This staged detection approach reduces false alarms while maintaining collision detection capability where needed.
Data Source
AI summary
A method by which a terminal transmits feedback information comprises the steps of: determining, in predetermined resource units for receiving the broadcast information in a broadcast resource region, whether broadcast information collides; selecting a first shared resource in a shared resource region corresponding to a first broadcast resource in which the conflict occurs in the broadcast resource region, on the basis of a pre-defined mapping rule of the broadcast resource region and the shared resource region; and transmitting, in the selected first shared resource, feedback information including information on the occurrence of the collision, wherein the broadcast resource region is a resource region, which is defined so as to transmit or receive the broadcast information, and the shared resource region can be determined as a resource region shared between a plurality of terminals. The UE is capable of communicating with at least one of another UE, a UE related to an autonomous driving vehicle, a base station or a network.