D2D Switchover Mechanism for LTE Interference Mitigation
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Solution Overview
Problem
In LTE systems, high load conditions lead to significant interference, lacking a mechanism to ensure D2D capable user equipment can switch to another system for guaranteed quality of transmission over short distances.
Innovation Solution
A network-side device determines from resource management information whether a D2D capable user equipment needs to be switched, triggering it to switch to a different system for device-to-device communication, based on conditions such as resource occupancy ratios and interference values, ensuring quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If D2D communication is implemented in LTE system, then short-distance communication quality is improved, but network interference increases under high load conditions
Solution Approach 1:
The patent introduces a network-side device as an intermediary that monitors resource management information and triggers D2D switching decisions. This mediator coordinates between cellular network and D2D communication, enabling the network to manage interference by controlling when D2D mode activates based on real-time resource occupancy ratios and interference levels.
Solution Approach 2:
The patent implements dynamic switching between cellular and D2D communication modes based on real-time conditions. The system continuously monitors resource occupancy ratios and interference values, dynamically adjusting the communication mode to optimize performance. When D2D conditions are favorable, the system transitions to D2D mode; when interference becomes problematic, it returns to cellular mode.
2Productivity
If network load is high, then system capacity is utilized, but D2D switching mechanism is absent to guarantee transmission quality
Solution Approach 1:
The patent establishes a feedback mechanism where the network-side device continuously monitors resource management information, including resource occupancy ratios and interference values. This feedback loop enables the system to make informed D2D switching decisions based on actual network conditions, ensuring transmission quality is maintained even during high-load periods.
Solution Approach 2:
The patent uses parameter thresholds (resource occupancy ratio thresholds and interference value thresholds) to trigger D2D switching. By monitoring changes in these parameters and comparing them against predefined thresholds, the system dynamically adjusts communication mode to maintain quality of service under varying network loads.
3Object-affected harmful factors
If D2D capable user equipment switches to another system, then interference is reduced, but system complexity increases
Solution Approach 1:
The patent implements self-service by having the D2D capable user equipment autonomously determine when switching is needed based on monitored resource management information. The UE evaluates resource occupancy ratios and interference values locally and makes switching decisions without requiring complex centralized control, reducing overall system complexity while still achieving interference reduction.
Data Source
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AI summary
Embodiments of the present application relate to the technical field of wireless communication, in particular a D2D switchover method, system, and device, for solving the problem in prior art of the lack of mechanism for D2D switchover for D2D user devices under appropriate conditions so as to ensure the short-distance transmission quality in the situation where an LTE system has too high a load and interference is too strong. Embodiments of the present invention comprise: a network device determines, according to resource management information and/or channel status information whether a D2D user device needs to perform a D2D switchover; when the D2D user device is determined to need to perform a D2D switchover, the D2D user device is triggered to switch to a heterogeneous system and conduct end-to-end communication, or to conduct end-to-end communication via the network device, or to conduct in the current system end-to-end communication not controlled by the network device. The method in the embodiments of the present invention ensures that D2D devices can perform D2D switchover under appropriate conditions even when an LED system has too high a load and interference is too strong, thereby enhancing the end-to-end communication performance.