Inter-gNB Exchange of Intended UL/DL Directions for CLI Management
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Solution Overview
Problem
Current wireless communication systems face challenges in effectively managing cross-link interference (CLI) due to the dynamic nature of uplink (UL) and downlink (DL) operations, particularly in NR Rel-16, where UE-to-UE and TRP-to-TRP interferences are prevalent, and existing solutions lack efficient mechanisms for inter-gNB exchange of intended UL/DL configurations.
Innovation Solution
The implementation of an access node that generates and transmits messages containing intended UL/DL direction information to a second access node, using various exchange message formats that include cell-specific, UE-specific, and RRC configurations, either semi-statically or dynamically via OTA signals, to manage CLI by indicating intended UL/DL directions and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-gNB exchange of intended UL/DL configurations is implemented, then CLI management capability is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary message exchange mechanism between gNBs to share intended UL/DL configurations. This mediator approach allows gNBs to coordinate their TDD operations without requiring complex direct interference management algorithms, thereby improving CLI management while keeping individual gNB complexity manageable through standardized message formats and procedures.
2Adaptability or versatility
If dynamic UL/DL configurations are exchanged between gNBs, then adaptability is improved, but loss of time in message exchange increases
Solution Approach 1:
The patent implements preliminary action by having gNBs exchange their intended UL/DL configurations in advance before actual transmissions occur. This allows receiving gNBs to prepare appropriate interference mitigation strategies ahead of time, enabling dynamic adaptability to changing TDD patterns while minimizing the time loss during actual data transmission through pre-coordinated resource allocation.
Data Source
AI summary
An approach is described of an access node that is configured to exchange intended Uplink (UL)/Downlink (DL) direction information for cross-link interference (CLI) management in a wireless communication system. The access node includes processor circuitry and communication circuitry. The processor circuitry is configured to generate a message including the intended UL/DL DL direction information. The communication circuitry is coupled to the processor circuitry, and configured to transmit the message to a second access node to thereby implement CLI management.