D2D Signal Transmission Probability Control for Wireless Interference
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Solution Overview
Problem
Current D2D communication systems face inefficiencies in transmitting and receiving signals due to the lack of effective methods for managing transmission probability, leading to suboptimal network performance and interference issues.
Innovation Solution
Implementing a method for D2D signal transmission based on transmission probability, where the probability is determined and adjusted for each resource pool, allowing UEs to decide whether to transmit signals and allocate resources efficiently, thereby controlling load and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D signal transmission is performed without transmission probability management, then transmission opportunities are increased, but interference and network overload increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmission probability parameter based on measured interference levels and reception quality. When interference is high or reception quality is poor, the transmission probability is reduced to decrease network load and interference. When conditions are favorable, transmission probability is increased to improve transmission efficiency. This dynamic parameter adjustment resolves the contradiction between maintaining high transmission opportunities and controlling interference.
2Area of stationary object
If transmission probability is increased to enhance discovery range, then more UEs can be discovered, but interference and collision probability increase
Solution Approach 1:
The patent implements feedback mechanisms where UEs measure reception quality (RSRP, RSRQ, SINR) and interference levels, then use this feedback to dynamically adjust transmission probability. This closed-loop control allows the system to expand discovery range by increasing transmission probability when conditions permit, while automatically reducing probability when collisions or interference are detected, thus resolving the contradiction between discovery range and collision probability.
3Productivity
If D2D communication is implemented without transmission probability control, then network capacity is increased, but eNB burden and power consumption increase
Solution Approach 1:
The patent enables UEs to autonomously determine transmission probability based on locally measured interference and reception quality without requiring continuous eNB control and signaling. This self-service mechanism allows UEs to independently manage their transmission behavior, reducing eNB processing burden and control signaling overhead while optimizing power consumption by avoiding unnecessary transmissions when interference is high or reception conditions are poor.
Data Source
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Figure 2
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AI summary
Abstract: An embodiment of the present invention provides a method for a terminal for transmitting a device-to-device (D2D) signal in a wireless communication system, the method for transmitting a D2D signal comprising the steps of: determining whether a D2D signal is to be transmitted on the basis of a transmission probability in a set resource region; and, if the D2D signal has been decided to be transmitted, transmitting the D2D signal from the set resource region, wherein the transmission probability is determined in accordance with a resource pool to which the set resource region belongs.