Full-Duplex Direction Signaling for UE TRP Unavailability
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Solution Overview
Problem
In full-duplex wireless communication systems, user equipment (UE) experiences poor performance due to unavailability of transmission reception points (TRPs) during full-duplex time intervals, leading to inefficient resource consumption and poor communication quality.
Innovation Solution
The UE is provided with an indication of full-duplex time intervals and disallowed communication directions, allowing it to transmit or receive communications only in allowed directions, thereby conserving resources and improving system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the network node operates in full-duplex mode using separate antennas/TRPs for downlink and uplink, then spatial isolation is improved and self-interference is reduced, but the UE experiences poor communication performance due to unavailability of serving TRP
Solution Approach 1:
The patent segments the communication directions by introducing the concept of disallowed communication directions during full-duplex time intervals. The network node divides communication into allowed directions (where TRPs are available) and disallowed directions (where serving TRPs are unavailable), enabling the UE to perform directional segmentation of communication operations.
Solution Approach 2:
The network node performs preliminary action by signaling to the UE which communication directions are disallowed during full-duplex time intervals before actual communication occurs. This advance notification allows the UE to proactively avoid attempting communication in disallowed directions, preventing wasted resources and poor performance.
2Productivity
If the UE attempts to transmit or receive communications in disallowed communication directions during full-duplex time intervals, then the UE maintains communication attempts, but resources are consumed inefficiently due to TRP unavailability
Solution Approach 1:
The network node provides feedback to the UE by signaling the disallowed communication directions during full-duplex time intervals. This feedback mechanism enables the UE to adjust its communication behavior accordingly, avoiding resource consumption in directions that will not succeed, thereby improving overall resource efficiency.
Solution Approach 2:
The UE performs self-service by autonomously avoiding communication attempts in disallowed directions based on network signaling. The UE independently manages its resource allocation by refraining from transmission or reception operations in identified disallowed directions, eliminating wasted energy consumption.
3Ease of operation
If the UE relies on the network node to refrain from scheduling communications during full-duplex time intervals, then communication scheduling may be optimized, but periodic and semi-persistent communications cannot be avoided due to fixed periodicity
Solution Approach 1:
Instead of having the network node refrain from scheduling communications (top-down approach), the patent inverts the approach by enabling the UE to autonomously identify and avoid disallowed communication directions (bottom-up approach). This inversion allows periodic and semi-persistent communications to continue without network intervention while the UE independently handles direction avoidance.
Solution Approach 2:
The patent changes the operational parameters of the UE by providing it with information about disallowed communication directions. The UE modifies its communication behavior dynamically based on these parameters, adjusting which directions it attempts to communicate in during full-duplex time intervals without changing its fixed periodicity requirements.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. Some aspects relate to a disallowed communication direction for full-duplex time intervals. Some aspects more specifically relate to defining, for a user equipment (UE), an allowable communication direction and/or a disallowed communication direction for full-duplex time intervals (for example, for slots and/or symbols associated with full-duplex operations). In some aspects, a network node transmitting, to a UE, an indication of a communication direction that is disabled or is to be dropped (for example, not received or transmitted) during slots or symbols that are associated with full-duplex operations at the network node. The UE may transmit or receive communications, during a full-duplex time interval, that are in an allowed communication direction (for example, that are not in the disallowed communication direction).