Multi-RAT Spectrum Sharing via Segmented Control Channels
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Solution Overview
Problem
Current 4G-5G dynamic spectrum sharing designs are detrimental to user equipment (UE) throughput and network coverage, leading to high overhead and limited resources in 4G and 5G systems, with significant interference between 4G and 5G UEs.
Innovation Solution
Proposed schemes for multi-RAT spectrum sharing involve UE capability information transmission to network nodes, followed by signaling for channel information provision, including CSI-RS measurement reports and SRS/PRACH transmissions, to enable efficient resource allocation and interference management between 5G and 6G systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If dynamic spectrum sharing is implemented for 4G-5G coexistence, then spectrum utilization is improved, but UE throughput deteriorates and network coverage is reduced due to high overhead
Solution Approach 1:
The patent segments the spectrum sharing problem by introducing separate control channels (first control channel for 4G UEs, second control channel for 5G UEs) and dividing the shared spectrum into different time resources. This segmentation allows 4G and 5G UEs to access spectrum simultaneously without mutual interference, resolving the throughput deterioration while maintaining spectrum utilization improvement.
Solution Approach 2:
The patent introduces network nodes as intermediaries that receive channel information from both 4G and 5G UEs, process this information, and generate coordinated scheduling decisions. These network nodes act as mediators that optimize resource allocation between different RATs, enabling improved spectrum utilization without sacrificing UE throughput.
2Quantity of substance
If dynamic spectrum sharing is implemented for 4G-5G coexistence, then spectrum utilization is improved, but network coverage deteriorates due to high overhead
Solution Approach 1:
By segmenting the control channels and time resources for 4G and 5G UEs, the patent eliminates the need for excessive overhead signaling. This segmentation allows the network to maintain comprehensive coverage by efficiently allocating spectrum resources without being constrained by high overhead requirements, thereby improving network coverage while maintaining spectrum utilization.
3Adaptability or versatility
If 4G and 5G systems coexist with DSS design, then spectrum sharing is enabled, but interference between 4G and 5G UEs increases
Solution Approach 1:
The patent segments time resources and control channels for 4G and 5G UEs, enabling spectrum sharing while preventing interference. By assigning different time slots and control channels to different RATs, the system achieves spectrum sharing capability without allowing 4G CRS and PDSCH to interfere with 5G UEs, thus resolving the interference problem.
Solution Approach 2:
The patent implements feedback mechanisms where network nodes receive channel information from UEs and use this feedback to make coordinated scheduling decisions. This feedback loop allows the system to adapt to channel conditions and optimize resource allocation, enabling spectrum sharing while minimizing interference between 4G and 5G UEs through intelligent coordination.
Data Source
AI summary
Various solutions for multi-radio access technology (RAT) spectrum sharing in mobile communications are described. An apparatus utilizing a first RAT may transmit user equipment (UE) capability information to a first network node of the first RAT, wherein the UE capability information indicates that the apparatus supports multi-RAT spectrum sharing (MRSS). Then, the apparatus may receive a signaling from the first network node, wherein the signaling indicates the apparatus to provide channel information for MRSS. Based on the signaling, the apparatus may perform at least one of the following: (i) transmitting a measurement report of a channel state information-reference signal (CSI-RS) of a second RAT to the first network node; and (ii) transmitting a sounding reference signal (SRS) or a physical random access channel (PRACH) to a second network node of the second RAT.