SFN Paging Beam Identification with Preconfigured SSB Parameters
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Solution Overview
Problem
User equipment (UE) operating in idle mode is unaware of communication parameters, such as beams or synchronization signal blocks, when receiving broadcast signaling from multiple transmission reception points (TRPs) in a single frequency network (SFN), leading to inefficiencies in receiving downlink transmissions.
Innovation Solution
The UE receives signaling indicating an SFN mode and associated parameters, allowing it to concurrently receive broadcast signaling via multiple TRPs using different beams and synchronization signal blocks, with downlink control channels scheduling shared channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the UE operates in idle mode without knowing SFN parameters, then the device complexity is reduced, but the reception reliability of broadcast signaling deteriorates
Solution Approach 1:
The network performs preliminary configuration by providing SFN parameter sets to the UE before the UE needs to receive broadcast signaling. The parameters are pre-indicated in system information or RRC signaling, so when the UE enters idle mode, it already has the necessary configuration to reliably receive signaling from multiple TRPs without needing to determine parameters in real-time.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network side (gNB) acts as a mediator that provides parameter sets to the UE. Instead of the UE independently determining complex SFN parameters from multiple TRPs, the network pre-configures and indicates appropriate parameter sets that the UE can directly use for reliable reception.
2Measurement precision
If the UE determines beam and SSB parameters in real-time, then the measurement precision improves, but the loss of time increases
Solution Approach 1:
The network pre-configures beam and SSB parameter sets before the UE needs to receive broadcast signaling. The UE receives indications of which parameter sets to use in advance (through system information or RRC signaling), eliminating the need for real-time determination and reducing latency while maintaining precision through pre-optimized parameter selection.
Solution Approach 2:
The patent prepares multiple parameter sets in advance as a cushion against varying reception conditions. The network pre-configures different beam and SSB parameter sets that the UE can select from based on reception quality, ensuring that the UE has pre-prepared options to quickly switch to optimal parameters without time-consuming real-time determination.
3Adaptability or versatility
If the UE receives broadcast signaling from multiple TRPs without SFN configuration, then the adaptability is reduced, but the device complexity is lowered
Solution Approach 1:
The network performs preliminary configuration by providing SFN parameter sets to the UE before idle mode operation. The parameters are pre-indicated in system information or RRC signaling, so when the UE enters idle mode, it already has the necessary configuration to reliably receive signaling from multiple TRPs without needing to determine parameters in real-time.
Solution Approach 2:
The patent enables adaptability through parameter changes by providing the UE with multiple pre-configured parameter sets that can be selected based on reception conditions. The network can indicate different parameter sets for different scenarios (different TRP combinations, different beam configurations), allowing the UE to adapt to SFN operations without implementing complex real-time decision logic.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described to support indication of a single frequency network (SFN) mode and associated parameters to a user equipment (UE), while the UE is operating in an idle mode. While operating in the idle mode, the UE may receive signaling from a transmission reception points (TRP), indicating that an SFN will be used for broadcast signaling received concurrently from multiple TRPs. Based on receiving the indication of the SFN, the UE may receive the broadcast signaling via a downlink control channel. For example, the UE may receive the broadcast signaling concurrently from a first TRP via a first beam and from a second TRP via a second beam, where the first and second beams may each be associated with a respective synchronization signal block (SSB).