On-Demand SIB1 Configuration via PBCH Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing and configuring System Information Block 1 (SIB1) on demand, particularly in 5G/NR systems where high-frequency bands and increased data rates require more flexible resource allocation.
Innovation Solution
The proposed solution involves a user equipment (UE) that determines, based on an indication in the physical broadcast channel (PBCH), whether a cell is associated with an on-demand SIB1. If so, the UE transmits a request to a second base station (BS) and receives the on-demand SIB1, utilizing a flexible configuration for the on-demand SIB1 that differs from legacy SIB1 configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SIB1 is transmitted periodically in legacy systems, then all UEs can receive system information reliably, but latency increases and power consumption rises for UEs that do not need the information
Solution Approach 1:
The patent implements dynamic SIB1 transmission where the base station can switch between periodic transmission mode and on-demand transmission mode based on network conditions and UE requests. The SS/PBCH block configuration dynamically indicates whether on-demand SIB1 is supported, allowing the system to adapt transmission behavior rather than using fixed periodic transmission
Solution Approach 2:
UEs that require system information can autonomously request SIB1 by detecting the on-demand indicator in SS/PBCH blocks and transmitting random access requests. The base station then provides SIB1 only to UEs that have explicitly indicated they need it, rather than broadcasting to all UEs periodically
2Loss of information
If SIB1 is transmitted periodically to all UEs, then information availability is ensured, but power consumption increases for UEs that do not require the information
Solution Approach 1:
UEs autonomously determine whether to request SIB1 by checking the on-demand indicator in received SS/PBCH blocks. Only UEs that need system information will initiate random access requests, allowing them to save power by not continuously monitoring for periodic SIB1 transmissions
Solution Approach 2:
The system changes the transmission parameter from fixed periodic intervals to event-triggered transmission based on UE requests. The base station monitors for random access requests and transmits SIB1 only when triggered, changing the temporal pattern of transmission to reduce overall energy consumption
3Loss of time
If on-demand SIB1 transmission is implemented, then latency and power consumption are reduced, but device complexity increases due to additional configuration parameters
Solution Approach 1:
The existing SS/PBCH block structure is extended to serve dual purposes: maintaining legacy periodic transmission indication while adding on-demand transmission capability. The same SS/PBCH block carries both legacy synchronization information and the new on-demand indicator, avoiding the need for separate signaling structures
Solution Approach 2:
The on-demand SIB1 configuration is nested within the existing random access procedure. UEs use the same random access channel (RACH) infrastructure to request SIB1, embedding the on-demand request mechanism within the existing access protocol rather than creating a separate request channel
Data Source
AI summary
Methods and apparatuses for an operation for configurations for on-demand SIB1 in a wireless communication system is provided. A method of a user equipment (UE) includes receiving, from a cell of a first base station (BS), a first synchronization signals and physical broadcast channel (SS/PBCH) block; determining, based on an indication in a physical broadcast channel (PBCH) of the first SS/PBCH block, a first value of kSSB; and determining, based on the first value of kSSB, whether the cell is associated with an on-demand system information block 1 (SIB1). The method further includes transmitting, based on a determination that the cell is associated with the on-demand SIB1, a request for the on-demand SIB1 to a second BS and receiving the on-demand SIB1.