D2D Cellular Resource Sharing Power Control
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Solution Overview
Problem
Existing resource sharing schemes for Device-to-Device (D2D) communication in cellular networks do not effectively optimize throughput in multicell networks, particularly due to interference issues and inefficient resource allocation across multiple cells.
Innovation Solution
A method and apparatus for acquiring channel state information (CSI) to determine optimal transmit powers for D2D and cellular users across multiple frequency bands, maximizing the weighted sum rate and improving network throughput by balancing resource allocation and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If non-orthogonal resource sharing is used between D2D and cellular users, then spectral efficiency is improved, but interference to cellular users increases
Solution Approach 1:
The patent changes the power allocation parameters dynamically based on channel conditions. By adjusting D2D transmit power according to channel state information and interference levels, the system achieves non-orthogonal resource sharing while controlling interference through parameter optimization rather than fixed allocation
Solution Approach 2:
The patent implements feedback mechanisms where channel state information is continuously monitored and used to adjust power allocation decisions. The base station receives channel quality indicators from cellular users and uses this feedback to optimize D2D power levels, creating a closed-loop system that balances spectral efficiency with interference control
2Productivity
If D2D communication shares resources with multiple cellular users in adjacent cells, then resource utilization is improved, but interference management complexity increases
Solution Approach 1:
The patent segments the interference management problem by treating each cellular user and each D2D pair as separate entities with individual power control. Instead of managing all interactions simultaneously, the system breaks down the complex multi-cell interference scenario into manageable per-user power allocation decisions based on local channel conditions
Solution Approach 2:
The patent introduces a new dimension of spatial awareness by considering channel state information from multiple cells and multiple users simultaneously. The power allocation operates in a multi-dimensional space considering D2D-to-D2D, D2D-to-cellular, and cellular-to-cellular channel conditions, transforming the problem from simple power control to multi-dimensional resource optimization
Data Source
AI summary
Embodiments of the disclosure provide a method and apparatus for resource sharing for D2D and cellular communications in a multicell network. The method comprises steps of: acquiring CSI on channels relating to D2D pair and a plurality of cellular users that potentially share resources with the D2D pair; and determining D2D transmit powers of the D2D pair on a plurality of frequency bands allocated to the plurality of cellular users and cellular transmit powers of the plurality of cellular users based on the CSI, to improve throughput of the multicell network.