D2D Resource Allocation via CSI Request Triggering
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Solution Overview
Problem
In Device-to-Device (D2D) communication systems, existing technologies face challenges in efficiently managing and allocating resources for direct data transmission between wireless devices without a base station, leading to suboptimal data transmission speeds and network load distribution.
Innovation Solution
A method and device where a base station transmits CSI request triggering information to user equipment (UE) to allocate resources for D2D link channels, allowing direct data transmission between UEs by receiving and processing channel state information, and managing resource allocation based on this information, including identifiers and index information for UEs within a D2D transmission UE list.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication is implemented without base station involvement, then data transmission speed and network capacity are improved, but resource allocation and channel management become more difficult
Solution Approach 1:
The patent introduces a resource allocation information message as an intermediary mechanism that enables D2D communication while maintaining base station control. The base station sends this message to UEs, containing resource allocation instructions and channel state information, thereby mediating between direct UE-UE transmission needs and base station management requirements.
Solution Approach 2:
The base station performs preliminary resource allocation before D2D communication begins. By pre-allocating resources and transmitting allocation information messages to UEs, the system prepares the communication framework in advance, allowing UEs to execute direct transmission without real-time base station intervention while maintaining organized resource usage.
2Productivity
If base station transmits control information for D2D communication, then resource allocation is optimized, but network overhead and base station load increase
Solution Approach 1:
The patent makes the resource allocation information message serve multiple functions: it conveys channel state information, provides resource allocation instructions, and enables D2D communication setup. By combining these functions into a single message type, the system reduces the number of separate control transmissions, thereby lowering base station energy consumption while maintaining allocation efficiency.
Solution Approach 2:
The system changes the parameter of control information transmission by using compact, structured allocation information messages that contain essential resources in a condensed format. This reduces the amount of data transmitted and processed by the base station, lowering energy consumption while maintaining effective resource allocation.
3Measurement precision
If channel state information is collected from UEs, then resource allocation accuracy is improved, but information processing complexity increases
Solution Approach 1:
The patent extracts only the essential channel state information needed for resource allocation from the UE measurements. By selectively collecting and processing only the necessary parameters (such as reference signal received power and signal-to-interference-plus-noise ratio) rather than all possible measurement data, the system achieves accurate resource allocation while minimizing processing complexity.
Data Source
AI summary
A channel information transmitting method and device are disclosed. The method may comprise: a step in which a base station transmits first channel state information (CSI)-request triggering information to first user equipment (UE); a step in which the base station receives the channel state information of a first D2D link channel from the first UE in response to the first channel from the first UE in response to the first CSI-request triggering information; and a step in which the base station allocates the resource of the first D2D link channel to second UE on the basis of the channel state information. Accordingly, the present invention enables data to be transmitted directly between the user equipment without passing through the base station, thereby increasing the speed of data transmission between the user equipment and distributing the load thereof.