Dynamic Scheduling Policy for Network Node D2D Resource Allocation
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Solution Overview
Problem
In network-assisted device-to-device (D2D) communication, simultaneous transmission to both a network node and a peer device within the same subframe often results in transmission power imbalance and spectral emission issues, leading to reduced transmission quality and inefficient resource utilization.
Innovation Solution
A network node with a controller dynamically selects a scheduling policy to allocate communication resources, allowing either simultaneous or separate scheduling of physical resource blocks for cellular and D2D transmissions based on device capabilities, location, and power budget, thereby addressing power imbalance and maintaining high frequency resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a device simultaneously transmits to both network node and peer device in the same subframe, then resource utilization increases, but transmission power imbalance occurs
Solution Approach 1:
The system dynamically selects between two scheduling policies (simultaneous transmission policy and separate transmission policy) based on current device capabilities, power budget, and location conditions. This dynamic adaptation allows the system to optimize resource utilization when conditions permit while maintaining transmission quality when power constraints exist.
Solution Approach 2:
The network node changes scheduling parameters by selecting different policies based on device power budget and location. When power budget allows, simultaneous transmission policy is applied; when power budget is constrained, separate transmission policy is applied, thereby adapting to changing system conditions.
2Productivity
If D2D communications reuse cellular spectrum resources, then spectral efficiency increases, but intra-cell interference increases
Solution Approach 1:
The system applies different scheduling policies to different devices based on their local conditions (location, power budget, capability). Devices with sufficient power budget can use simultaneous transmission policy to maximize spectral efficiency, while devices with power constraints use separate transmission policy to minimize interference, thereby optimizing overall system performance.
Solution Approach 2:
The scheduling policy is dynamically adjusted based on current transmission conditions, power budget, and device capabilities. This allows the system to adaptively balance spectral efficiency and interference management according to real-time conditions.
3Productivity
If simultaneous transmission is allowed without policy selection, then resource utilization improves, but power imbalance and spectral emission issues worsen
Solution Approach 1:
The network node performs preliminary assessment of device capabilities, power budget, and location conditions before selecting a scheduling policy. This preliminary action prevents power imbalance and spectral emission issues by identifying suitable candidates for simultaneous transmission beforehand, rather than allowing unrestricted simultaneous transmission.
Solution Approach 2:
The system uses device capability information, power budget reports, and location data as feedback to determine the appropriate scheduling policy. This feedback mechanism ensures that simultaneous transmission is only permitted when devices have sufficient power budget and capability, thereby preventing spectral emission issues.
Data Source
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Figure 6A~6B
AI summary
A network node (310) comprising a radio frequency communications interface (230) and a controller (210), said network node (310) being configured to service at least one first radio frequency communication device (320) being configured for both network communication and for device-to-device communication with a second radio frequency communication device (325), wherein said controller (210) is configured to determine if a restriction of a scheduling policy is necessary for said first radio frequency communication device (320), select a scheduling policy accordingly. The controller is further configured to allocate communication resources according to said selected scheduling policy to said first radio frequency communication device (320). The scheduling policy is one which enables simultaneous network communication and device-to-device communication in said same transmission time interval (A, B, C, D, E) or one which enables either network communication or device-to-device communication in said same transmission time interval.