NR-SS Medium Reservation Framework for Coexistence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face interference and communication inefficiencies due to the lack of effective resource partitioning and medium sensing procedures in shared spectrum environments, particularly in 5G networks with diverse deployments and services, leading to increased signaling overhead and latency.
Innovation Solution
A medium reservation framework that includes a method for receiving a reservation request at a user equipment (UE) and transmitting a precoded reservation response signal, which carries an indication of estimated interference, to facilitate coordinated and uncoordinated wireless network operations in licensed and shared spectrum, optimizing resource allocation and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional wireless communication systems operate in shared spectrum without effective resource partitioning, then spectrum utilization is maximized, but interference increases and communication efficiency deteriorates
Solution Approach 1:
The system performs preliminary medium sensing and reservation requests before actual data transmission. The gNB transmits RRQ signals and the UE responds with RRS signals carrying precoded SRS and interference estimates, allowing the system to reserve resources in advance and avoid interference during actual communication.
Solution Approach 2:
The UE provides feedback about estimated interference levels through the RRS signal, which contains precoded SRS modulated by interference indications. This feedback enables the gNB to adapt resource allocation and transmission parameters to minimize interference impact on communication efficiency.
2Object-affected harmful factors
If medium sensing procedures are implemented in shared spectrum, then interference is reduced, but signaling overhead increases
Solution Approach 1:
The medium sensing information, interference estimates, and resource reservation responses are merged into a single RRS signal transmission. The precoded SRS is modulated by interference indications, combining multiple functions into one efficient signal that reduces overall signaling overhead while maintaining comprehensive interference management.
Solution Approach 2:
The RRS signal serves multiple functions simultaneously: it responds to the RRQ, carries precoded SRS for channel estimation, and conveys interference level information. This multi-functional approach eliminates the need for separate signaling messages for each function, reducing total overhead.
3Adaptability or versatility
If resource partitioning is implemented for coordinated and uncoordinated networks, then coexistence is improved, but system complexity increases
Solution Approach 1:
The system dynamically adapts between coordinated and uncoordinated operation modes based on the deployment scenario. The same basic framework of RRQ/RRS signaling and precoded SRS transmission can operate with or without gNB coordination, allowing flexible adaptation to different network configurations without requiring entirely separate systems.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A medium reservation framework is disclosed for coexistence of coordinated and uncoordinated wireless networks in licensed spectrum and shared spectrum. The proposed medium reservation framework organically takes into account operating regimes with different numbers of Tx/Rx antennas per node, provides flexibility in trading off medium contention aggressiveness and power saving, leverages the inherent synchronization nature of NR, and covers both coordinated and uncoordinated operation scenarios. Various aspects of the medium reservation framework may be centered on one or more combinaitons of some basic building blocks, such as an operation grid, synchronization signals, and reservation messages, such as a reservation request signal (RRQ) and one or more a reservation response signals (RRS).