UE PDCCH Monitoring Around CSI-RS in Unlicensed Channel Occupancy
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in unlicensed band operations, which affect the performance of devices like UEs and base stations.
Innovation Solution
Implementing enhanced signaling procedures using DCI format 2_0 to indicate channel occupancy duration and configure CSI-RS, allowing devices to adjust PDCCH monitoring and CSI-RS transmission accordingly, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If user equipment transmits and receives information in full duplex mode simultaneously, then communication efficiency is improved, but self-interference from transmitter to receiver deteriorates signal quality
Solution Approach 1:
The patent segments the harmful self-interference signal into multiple adjustable components and applies different cancellation techniques to each segment. The interference cancellation is divided into multiple stages: analog cancellation, digital cancellation, and residual interference handling, with each stage addressing specific portions of the interference spectrum.
Solution Approach 2:
The patent introduces intermediary components including analog cancellers, digital signal processors, and adaptive filters that act as mediators between the transmitter and receiver. These intermediaries process and cancel the self-interference signal before it reaches the receiver, enabling full duplex operation.
2Reliability
If base stations coordinate transmissions to eliminate interference, then network performance is improved, but control signaling overhead increases
Solution Approach 1:
The patent enables user equipment to autonomously perform interference cancellation and coordination functions that would otherwise require extensive base station control. The UE self-adjusts transmission parameters, performs measurements, and executes cancellation algorithms, reducing the need for control signaling between base stations and UEs.
Solution Approach 2:
The patent implements preliminary coordination where base stations and user equipment exchange necessary information in advance to pre-coordinate transmissions. This preliminary action establishes transmission schedules and interference management parameters before actual data transmission, reducing the need for continuous control signaling during operation.
Data Source
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AI summary
A user equipment (UE) is described. The UE may comprise higher layer processing circuitry configured to acquire first radio resource control (RRC) information and second RRC information. The first RRC information may indicate a search space set for a detection of a physical downlink control channel (PDCCH) with downlink control information (DCI) format 2_0. The DCI format 2_0 may include a field for indicating a channel occupancy duration. The second information may configure a Channel State Information-Reference Signal (CSI-RS). The UE may also comprise receiving circuitry configured to monitor the PDCCH with the DCI format 2_0. If a set of symbol(s) is indicated as not being within the channel occupancy duration by a value of the field in the DCI format 2_0, the PDCCH may be monitored on the set of symbol(s) and the CSI-RS may not be received on the set of symbol(s).