ProSe Focused Frames for Dynamic TDD Resource Allocation
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Solution Overview
Problem
Current LTE TDD systems face challenges in efficiently supporting varying ProSe traffic without impacting cellular traffic, as the semi-static TDD UL-DL configuration cannot dynamically adjust to changing ProSe traffic loads, leading to either insufficient resources or resource wastage.
Innovation Solution
Introducing ProSe Focused Frames (PFF) with a high density of UL subframes, allowing for periodic scheduling and resource allocation to efficiently manage ProSe communications, while minimizing the impact on LTE traffic by dynamically configuring PFF frames and resource pools based on traffic demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If semi-static TDD UL-DL configuration is used, then cellular communication stability is maintained, but ProSe traffic adaptability deteriorates
Solution Approach 1:
The patent introduces dynamic ProSe Focused Frames that can be periodically scheduled within the semi-static TDD configuration. These PFF frames contain a high density of UL subframes specifically for ProSe communication, allowing the system to adapt to varying ProSe traffic loads while maintaining the overall stability of the cellular TDD configuration. The network can dynamically activate/deactivate PFF frames based on ProSe traffic demand.
Solution Approach 2:
The patent segments the TDD frame structure by introducing dedicated ProSe Focused Frames that are distinct from regular cellular frames. These PFF frames are specifically designed with high UL subframe density for ProSe communication, separating ProSe resource allocation from general cellular resource management. This segmentation allows independent optimization of ProSe resources without affecting overall cellular configuration stability.
2Productivity
If more UL subframes are allocated for ProSe communication, then ProSe communication capacity is improved, but cellular uplink resources are reduced
Solution Approach 1:
The patent implements periodic ProSe Focused Frames that are scheduled at specific intervals within the TDD configuration. Instead of continuously allocating resources for ProSe, the system uses periodic PFF frames with high UL subframe density, allowing cellular uplink resources to be fully utilized in non-PFF frames. This periodic approach provides ProSe capacity when needed while preserving cellular resources at other times.
3Productivity
If dynamic configuration of PFF frames is implemented, then ProSe traffic efficiency is improved, but system complexity increases
Solution Approach 1:
The patent incorporates feedback mechanisms where the network monitors ProSe traffic conditions and dynamically adjusts the scheduling and configuration of PFF frames accordingly. This feedback-driven approach allows the system to optimize ProSe traffic efficiency by activating PFF frames only when ProSe traffic demand is detected, rather than continuously managing complex dynamic configurations.
Data Source
AI summary
The present disclosure pertains to method for operating a network node of a cellular communication network, the method comprising scheduling, by the network node, a ProSe Focused Frame, PFF frame. The disclosure also pertains to related devices and methods.