Asynchronous Slot Coordination for Cross-Link Interference Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing interference and reliability during asynchronous slots, which occur when slot types change dynamically, leading to cross-link interference and complications in transmission configuration indicator (TCI) state reporting.
Innovation Solution
Implementing a handshake procedure between base stations to determine communication parameters and adjust beam settings, and managing TCI states based on slot type to reduce interference and enhance reliability during asynchronous slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slot types are dynamically changed to enable asynchronous communication, then adaptability and communication flexibility are improved, but cross-link interference increases and reliability deteriorates
Solution Approach 1:
The system performs a handshake procedure between base stations before asynchronous slot communication begins. This preliminary action includes exchanging information about beam directions, slot patterns, and communication parameters to identify and manage potential interference scenarios in advance, thereby maintaining reliability while enabling slot flexibility
Solution Approach 2:
A coordination mechanism acts as an intermediary between base stations performing asynchronous operations. The handshake procedure serves as this intermediary, mediating the interaction by establishing agreed-upon parameters and restrictions that prevent harmful interference while allowing each base station to maintain its flexible slot patterns
2Object-affected harmful factors
If beam directions are adjusted to manage interference during asynchronous slots, then harmful effects are reduced, but device complexity increases
Solution Approach 1:
The system applies beam restrictions locally to specific base station pairs and specific asynchronous slots where interference is identified. Rather than implementing complex global beam management, the handshake procedure enables targeted, localized adjustments to beam directions and restrictions only where needed, reducing overall system complexity while effectively managing interference
3Productivity
If communication parameters are optimized through handshake procedure, then data rates and spectral efficiency are improved, but loss of time due to coordination overhead increases
Solution Approach 1:
The handshake procedure implements partial action by performing coordination only for base station pairs and time slots where asynchronous communication is actually occurring. Rather than continuous full-system coordination, the system selectively applies the handshake procedure where needed, reducing time loss while still optimizing data rates for active asynchronous transmissions
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first base station may communicate during asynchronous slots in accordance with a set of communication parameters determined from a handshake procedure performed with a second base station. For example, based on a change to a slot type of a slot to an asynchronous slot, the first base station and the second base station may perform the handshake procedure to determine the set of communication parameters and may communicate one or more messages during the slot in accordance with the set of communication parameters. Additionally, or alternatively, a user equipment (UE) may transmit a sounding reference signal (SRS) associated with a transmission configuration indicator (TCI) state based on a slot type of a first slot in which the UE transmits the SRS and a reference signal received in a second slot having the slot type.