Directional Paging Beam Activation for Efficient 5G SSB Monitoring
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in paging procedures for highly directional systems, particularly in managing beam synchronization and resource allocation for efficient paging information transmission.
Innovation Solution
A minimal feedback-based paging procedure is implemented, where a WTRU receives a default and/or dynamic set of active synchronization signal and physical broadcast control channel blocks (SSBs) to determine suitable beams for paging, and sends activation requests to activate multiple SSBs with varying priorities, while a gNB dynamically configures beam activation based on mobility states and paging group requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If simultaneous multiple transmissions across several beams are used in highly directional systems, then paging coverage and reliability are improved, but network resource overhead and system complexity increase significantly
Solution Approach 1:
The patent implements dynamic beam activation and deactivation based on mobility states. The network configures a default set of active SSBs and allows dynamic updates through RRC signaling. The WTRU determines its mobility state (low, medium, high) and the network adjusts the active SSB set accordingly, transitioning from static to dynamic beam management to reduce complexity while maintaining reliability.
Solution Approach 2:
The patent changes the parameter of active SSB configuration from fixed to variable. The network can update the active SSB set through RRC signaling based on mobility state. Different monitoring occasions are configured for different mobility states, allowing the system to adapt parameters dynamically rather than using fixed configurations for all scenarios.
2Productivity
If multiple beams are activated for paging transmissions in high-density user scenarios, then paging capacity and coverage are enhanced, but network resource overhead increases
Solution Approach 1:
The patent applies local quality by configuring different active SSB sets and monitoring occasions for different mobility states and user scenarios. Instead of uniformly activating all beams for all users, the system tailors the beam configuration to local conditions - low mobility users get fewer monitoring occasions while high mobility users get more, optimizing resource usage locally for each user group.
Solution Approach 2:
The patent implements partial action by activating only the necessary subset of beams for each mobility state rather than all available beams. The network configures a default active SSB set and selectively activates additional beams only when needed based on user mobility state, avoiding unnecessary resource allocation for beams that would not be beneficial for the current user group.
3Loss of energy
If the network dynamically activates and deactivates beams based on mobility states, then resource efficiency is improved, but signaling overhead and procedure complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple active SSB sets corresponding to different mobility states before the paging procedure begins. The network prepares the default active SSB set and potential updated sets in advance, so when a paging event occurs, the system can quickly select and apply the appropriate configuration based on the determined mobility state without complex real-time calculations.
Solution Approach 2:
The patent implements feedback through the WTRU's uplink signaling that indicates its mobility state or suitable SSB. The WTRU provides feedback about its reception conditions and mobility characteristics, allowing the network to adjust the active SSB set appropriately. This feedback mechanism enables adaptive beam management without requiring complex network-side measurements and decisions.
Data Source
AI summary
Apparatus for paging for highly directional systems. A WTRU receives a default and/or a dynamic set of active SSBs which indicates the beams/SSBs is used to receive paging DCI, e.g. DCI scrambled with P-RNTI, over PDSCH. A WTRU utilizes the default and/or dynamic set of active SSBs in order to determine PDCCH monitoring occasions, PMOs, that are monitored in the WTRU's paging occasions, POs. A WTRU sends paging activating requests to activate a suitable SSB using associated UL signal/resources, if the suitable SSB fulfills a SSB criteria, if the activation duration has elapsed and if the monitoring duration has elapsed. A WTRU may send one or more paging activation requests to activate multiple SSBs, e.g., a field of view, FOV, around a suitable SSB. Said paging activation requests implements a minimal feedback-based paging procedure for paging in highly directional systems, to which the gNB replies with paging configuration for the suitable SSB.