MBS Tracking Reference Signals for Idle-State Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring tracking reference signals (TRS) for multicast and broadcast services (MBS) in idle or inactive states, particularly in common frequency resources (CFR), which affects synchronization and connectivity for user equipment (UEs).
Innovation Solution
The method involves configuring and transmitting TRS configurations for MBS in CFR, enabling UEs to receive TRS according to specified settings, and base stations to transmit TRS configurations, facilitating synchronization and connectivity during idle or inactive states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If TRS configuration is provided in CFR for MBS, then synchronization and connectivity for UEs in idle/inactive states is enhanced, but device complexity and configuration management difficulty increase
Solution Approach 1:
The patent segments the TRS configuration into separate components: a first TRS configuration for MBS services and a second TRS configuration for other services. This allows independent management and activation of each configuration type, reducing the complexity of handling multiple TRS configurations simultaneously while maintaining reliable synchronization for MBS in idle/inactive states.
Solution Approach 2:
The patent introduces dynamic activation mechanisms where the network can selectively activate the first TRS configuration based on UE state and service requirements. The configuration can be activated deactivation dynamically through signaling messages, allowing the system to adapt to changing conditions without requiring permanent complex configuration management infrastructure.
2Measurement precision
If TRS is transmitted in CFR for MBS, then time and frequency tracking accuracy is improved, but signal interference and resource allocation complexity increase
Solution Approach 1:
The patent applies local quality by configuring the first TRS with specific parameters tailored to MBS services in CFR, including dedicated time resources, frequency allocations, and transmission power levels. This localized optimization ensures high tracking accuracy for MBS while minimizing interference with other services through careful resource partitioning and parameter customization.
Solution Approach 2:
The network performs preliminary configuration and signaling before actual TRS transmission, pre-allocating time-frequency resources and configuring transmission parameters in advance. This preliminary action allows the UE to prepare its tracking mechanisms beforehand, reducing real-time processing complexity and minimizing potential interference during actual signal transmission.
3Reliability
If TRS configuration is activated for MBS, then UE connectivity in idle state is improved, but energy consumption and processing overhead increase
Solution Approach 1:
The patent implements periodic activation and deactivation of the first TRS configuration based on UE state transitions and service requirements. Instead of continuous operation, the TRS is activated periodically when needed for MBS services and deactivated during idle periods, significantly reducing energy consumption while maintaining reliable connectivity when required.
Solution Approach 2:
The UE autonomously monitors its state and service requirements to determine when TRS configuration activation is necessary. The UE can self-determine appropriate activation timing based on its idle/inactive state and MBS service needs, reducing unnecessary processing and energy consumption while ensuring connectivity when MBS services are required.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, in an idle or inactive state and in a common frequency resource (CFR) used for multicast and broadcast services (MBS), a tracking reference signal (TRS) configuration for MBS. The UE may receive a TRS according to the TRS configuration. Numerous other aspects are described.