SIB1 Resource Allocation for LPWA via SSB Configuration
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently allocating resources for System Information Block Type 1 (SIB1) in Low Power Wide Area (LPWA) communications, particularly due to limitations in bandwidth and antenna capabilities of LPWA devices, and the need for multiple repetitions of SIB1-BR to ensure coverage.
Innovation Solution
The proposed solution involves determining a set of resources for the reception of SIB1 based on resource blocks associated with the Synchronization Signal Block (SSB), an SSB transmission pattern, and information received via the Physical Broadcast Channel (PBCH), which allows for efficient resource allocation and reduced scheduling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple repetitions of SIB1-BR are used to ensure coverage, then reliability of system information delivery is improved, but scheduling overhead increases
Solution Approach 1:
The patent segments the resource allocation by separating SIB1-BR transmission from traditional dynamic scheduling. It divides the resource allocation into two parts: (1) predetermined resources based on SSB configuration for LPWA devices, and (2) traditional dynamic scheduling for non-LPWA devices. This segmentation allows multiple repetitions of SIB1-BR without increasing scheduling overhead, as the repetitions use predetermined resources rather than requiring new scheduling decisions.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the resource allocation for SIB1-BR transmission based on SSB (Synchronization Signal Block) characteristics before actual transmission occurs. The network entity determines the set of resources for SIB1-BR transmission in advance based on SSB RBs, transmission pattern, and PBCH information, eliminating the need for dynamic scheduling during each repetition.
2Reliability
If resource allocation is optimized for LPWA devices, then SIB1 coverage for LPWA devices is improved, but conflicts in monitoring occasions between LPWA and non-LPWA devices may increase
Solution Approach 1:
The patent applies local quality by providing different resource allocation mechanisms for different device types. LPWA devices use predetermined resources based on SSB configuration, while non-LPWA devices use traditional dynamic scheduling. This differentiation ensures that LPWA devices receive adequate SIB1 coverage without forcing conflicts with non-LPWA devices, as each type operates under its own optimized allocation rules.
Solution Approach 2:
The patent uses the SSB (Synchronization Signal Block) as an intermediary to resolve conflicts between LPWA and non-LPWA devices. The SSB characteristics (RBs, transmission pattern, PBCH information) serve as a common reference that both device types can understand. The network entity uses SSB information to determine SIB1-BR resources for LPWA devices while maintaining traditional scheduling for non-LPWA devices, thus mediating between the two requirements.
Data Source
AI summary
Various aspects of the present disclosure relate to the transmission of system information for low power wide area (LPWA) devices using pre-determined resources that are based on aspects of a synchronization signal block (SSB) transmission (e.g., resource blocks (RBs) for the SSB) and/or a control resource set zero (CORESET0) configuration for non-LWPA devices. Further, the techniques can mitigate or avoid the overlap of monitoring occasions associated with use of the CORESET0 for both non-LWPA devices and LWPA devices. In doing so, the wireless communications system may reduce overhead introduced by the number of scheduling command transmissions for LPWA devices, among other benefits.