SHF EHF Wireless Transmission Path Selection and Resource Scheduling
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Solution Overview
Problem
The line of sight (LoS) limitation in super high frequency (SHF)/extremely high frequency (EHF) band wireless transmissions poses challenges, particularly in cellular networks where increased mobile traffic leads to inter-cell interference and handover issues, necessitating the exploration of new frequency resources and transmission technologies.
Innovation Solution
A multi-level relay topology and separation of control and traffic resource allocation in SHF/EHF band wireless transmission systems, utilizing a list managing unit, path finding unit, and scheduling unit to select and allocate radio resources, ensuring LoS communication by switching between SHF/EHF and cellular frequency bands as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cell radius is reduced to increase mobile traffic capacity, then traffic handling capability is improved, but inter-cell interference increases and handover delays occur
Solution Approach 1:
The patent segments the cellular network into multiple small cells with different frequency band assignments. By dividing the network into smaller units and assigning different frequency resources (subframe configurations) to different cells, the system can handle increased traffic capacity while reducing inter-cell interference through frequency division. This segmentation approach allows independent optimization of each cell's resource allocation.
Solution Approach 2:
The patent implements dynamic resource allocation where the eNodeB can flexibly configure and reconfigure frequency resources for different cells and users in real-time. The system dynamically adjusts subframe configurations, bandwidth allocations, and frequency assignments based on current traffic conditions, channel quality, and handover requirements, thereby maintaining reliability while supporting high traffic capacity.
2Reliability
If SHF/EHF band is used for wireless transmission, then interference and handover issues are alleviated, but line of sight communication limitation occurs
Solution Approach 1:
The patent introduces relay nodes as intermediaries in the SHF/EHF band transmission system. These relay nodes receive signals from distant base stations and retransmit them to user equipment, effectively extending the coverage area. The relay nodes act as mediators that enable communication in non-line-of-sight conditions by breaking the direct transmission path into multiple shorter segments, each with better propagation characteristics.
Solution Approach 2:
The patent employs beamforming technology that adds spatial dimensionality to the transmission. By using multiple antennas to create directed beams, the system can focus energy along specific paths and steer beams around obstacles or through reflective surfaces, effectively operating in three-dimensional space rather than being constrained to direct line-of-sight paths.
3Productivity
If control and traffic resources are allocated separately, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments resource allocation into distinct control plane and user plane functions. Control resources (signaling, scheduling information) are allocated independently from traffic resources (data transmission). This segmentation allows each to be optimized separately - control resources can use more conservative, reliable allocation while traffic resources can use aggressive, throughput-optimized allocation, improving overall efficiency despite the increased management complexity.
Data Source
AI summary
Provided is an apparatus for super high frequency (SHF)/extremely high frequency (EHF) band wireless transmission on a multi-level configuration. The apparatus may include a list managing unit to receive and manage a first list associated with an SHF/EHF band signal from a terminal connected to a wireless network, a path finding unit to select a path having a communication quality value greater than or equal to a first threshold value by referring to the first list, and a scheduling unit to schedule available SHF/EHF band radio resources for the selected path.