Prioritizing D2D Transmission and Reception in Wireless Systems
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, device-to-device (D2D) transmission and reception cannot be performed simultaneously at the same subframe, necessitating a method to prioritize between the two to avoid overlapping.
Innovation Solution
A user equipment (UE) detects both scheduled D2D transmission and reception at the same subframe and determines whether to perform either D2D transmission or D2D reception, prioritizing based on logical channel and service priorities, allowing only one to occur at a time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE attempts to perform both D2D transmission and D2D reception at the same subframe, then communication efficiency is improved, but signal interference and transmission errors occur
Solution Approach 1:
The patent implements dynamic prioritization where the UE can flexibly switch between transmission and reception modes based on real-time conditions. The processor determines priority dynamically by evaluating service types (e.g., public safety, V2X), logical channel configurations, and scheduling information, allowing the system to adapt to changing communication requirements rather than using fixed static priorities
Solution Approach 2:
The patent changes the parameter of transmission priority by evaluating different service types and logical channel configurations. The system adjusts the priority level based on service urgency (e.g., public safety services receive higher priority than regular data services), enabling the UE to prioritize critical communications while maintaining overall system efficiency
2Reliability
If the UE prioritizes D2D transmission over reception, then transmission reliability is improved, but reception of critical data may be missed
Solution Approach 1:
The patent incorporates feedback mechanisms where the UE continuously monitors scheduling information from the network and adjusts its transmission/reception priorities accordingly. The processor evaluates received scheduling assignments and feedback from the network to make informed decisions about which operation to prioritize, ensuring that critical communications are not missed while maintaining transmission reliability
3Loss of information
If the UE prioritizes D2D reception over transmission, then data reception completeness is improved, but transmission of urgent data is delayed
Solution Approach 1:
The patent implements preliminary action by pre-configuring priority rules and logical channel configurations before communication occurs. The UE is pre-configured with service type priorities, logical channel configurations, and scheduling parameters that enable it to make rapid priority determinations without delay. This pre-prepared framework allows the UE to quickly evaluate incoming scheduling information and switch between transmission and reception modes without significant latency
Data Source
AI summary
A method and apparatus for prioritizing a device-to-device (D2D) transmission and a D2D reception in a wireless communication system is provided. A user equipment (UE), which cannot perform the D2D transmission and the D2D reception at the same subframe simultaneously, detects both the D2D transmission and the D2D reception, which are scheduled at the same subframe, and determines whether to perform either the D2D transmission or the D2D reception at the same subframe.