Multi-RAT WTRU Coordination for LTE-NR Interference Handling
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing interference between different radio access technologies (RATs) such as LTE and NR, particularly in the context of 5G communications, which can affect signal reception quality and efficiency.
Innovation Solution
A wireless transmit/receive unit (WTRU) is configured to utilize dynamic RAT configuration, partial resource puncturing, and coordinated signal processing to manage interference between LTE and NR signals, ensuring desired signal reception quality by overlapping resources without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple RATs (LTE and NR) share spectrum resources, then system capacity and spectral efficiency are improved, but interference between RATs increases and signal reception quality deteriorates
Solution Approach 1:
The patent segments the spectrum resources by introducing a coordination set that divides resources into dedicated portions for LTE and NR RATs. This segmentation allows each RAT to operate in its allocated resources without interference, while still enabling coordinated multi-point transmission to improve system capacity and spectral efficiency.
Solution Approach 2:
The patent introduces a coordination set as an intermediary mechanism that mediates resource allocation between LTE and NR RATs. This intermediary structure enables the network to coordinate transmissions from multiple points across different RATs, managing interference while maximizing spectral efficiency and system capacity.
2Adaptability or versatility
If dynamic RAT configuration is implemented, then adaptability and signal reception quality are improved, but device complexity and coordination overhead increase
Solution Approach 1:
The patent implements dynamic RAT configuration where the WTRU can be assigned to different coordination sets (LTE, NR, or both) based on current network conditions and service requirements. This dynamic assignment allows the system to adapt to changing conditions while the coordination set framework manages the complexity of multi-RAT coordination.
Solution Approach 2:
The patent changes the operational parameters of the WTRU by configuring it with different RAT combinations and coordination set assignments. By adjusting these parameters dynamically, the system achieves adaptability in multi-RAT environments while the standardized coordination framework prevents exponential growth in device complexity.
3Productivity
If coordinated multi-point transmission is used across RATs, then spectral efficiency is improved, but interference management and resource coordination become more difficult
Solution Approach 1:
The patent segments the coordination function by introducing coordination sets that group transmission points and their associated resources. This segmentation allows the network to manage coordinated multi-point transmission across RATs in a modular fashion, improving spectral efficiency while making resource coordination more tractable through structured organization.
Solution Approach 2:
The patent changes the resource allocation parameters by assigning specific time-frequency resources to different coordination sets and RATs. This parameter-based coordination enables efficient spectral utilization through coordinated transmission while simplifying interference management through structured resource assignment rules.
Data Source
AI summary
Systems, methods, and instrumentalities are disclosed for transmitting a message. For example, a first radio access technology (RAT) and/or a second RAT may be determined. The first RAT may be determined for reception of data. The second RAT may be determined for the reception of the data, perhaps for example based on an indication received via the first RAT. The data may be received via a first node associated with the first RAT and a second node associated with the second RAT.