D2D Resource Allocation via Adaptive Contention Counter
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources for UE-to-UE communication, particularly in managing contention sections and optimizing resource usage for Device-to-Device (D2D) communication, which affects system throughput and power consumption.
Innovation Solution
The proposed solution involves a method for UE-to-UE communication where UEs stochastically select contention sections and adjust transmission probabilities based on contention counter values, allowing for efficient resource allocation and reduced power consumption by optimizing the use of contention slots and data transmission sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs continuously monitor and contend for resources in D2D communication, then resource allocation reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the contention counter variable and adaptive. The counter value is dynamically adjusted based on channel conditions, traffic load, and previous contention outcomes. This allows the system to transition between aggressive contention (when resources are abundant) and conservative contention (when resources are scarce or channel conditions are poor), thereby optimizing the trade-off between resource allocation reliability and power consumption.
Solution Approach 2:
The patent changes the parameter of transmission probability by introducing a contention counter that modulates the contention behavior. By varying the counter value, the system adjusts the probability of selecting contention sections and transmitting signals. This parameter change enables flexible adaptation to different network conditions, improving resource allocation reliability when needed while reducing power consumption during low-activity periods.
2Speed
If UEs increase transmission probability in contention sections, then resource acquisition speed is improved, but interference to other UEs increases
Solution Approach 1:
The patent uses parameter changes by adjusting the transmission probability based on the contention counter value and observed channel conditions. When the counter indicates favorable conditions, the transmission probability increases to speed up resource acquisition. When interference is detected or resources are scarce, the probability is reduced to minimize harmful effects on other UEs. This dynamic parameter adjustment resolves the contradiction between acquisition speed and interference generation.
3Ease of manufacture
If fixed resource allocation is used for D2D communication, then implementation simplicity is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent transforms fixed resource allocation into a dynamic system through the contention counter mechanism. The counter adapts to changing network conditions, traffic patterns, and channel quality, allowing resource allocation to be optimized in real-time. This dynamic approach maintains relative implementation simplicity while dramatically improving resource utilization efficiency compared to static allocation schemes.
Data Source
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AI summary
Disclosed in the present application is a method for transmitting/receiving a signal using device-to-device communication by a user equipment in a wireless communication system. More specifically, the method comprises the steps of: transmitting a first signal in contention slot included in one of a plurality of contention intervals; receiving, in response to the first signal, a second signal in the contention slot in which the first signal is transmitted; and transmitting/receiving a data signal or a response signal to the data signal in at least one time resource corresponding to the one of the plurality of contention intervals by using device-to-device communication.