Wireless SSB Signaling for On-Demand System Information
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing energy consumption, particularly in managing the transmission and reception of common signals such as SSB, SIB1, and PRACH, which are always active, leading to unnecessary power consumption even when there is no ongoing traffic.
Innovation Solution
The proposed method involves indicating to User Equipment (UE) whether a base station will provide SIB1 or wake up through a random access response (RAR) or synchronization signal block (SSB), allowing the UE to adjust its behavior accordingly, such as initiating another access procedure or performing cell reselection, thereby reducing unnecessary signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station continuously transmits common signals (SSB, SIB1, PRACH) to maintain user connectivity, then connectivity reliability is improved, but energy consumption increases
Solution Approach 1:
The base station transmits SSB and SIB1 periodically instead of continuously, with configurable periods that can be adjusted based on traffic conditions. This allows the base station to enter low-power states between transmission periods while still maintaining user connectivity when needed.
Solution Approach 2:
The system dynamically adjusts the transmission behavior of common signals based on real-time traffic conditions and user requirements. The base station can switch between different transmission modes (continuous, periodic, on-demand) and adjust transmission parameters adaptively to balance connectivity reliability and energy consumption.
2Loss of information
If the base station always provides system information (SIB1) to all UEs, then information availability is improved, but unnecessary power consumption occurs when no traffic is ongoing
Solution Approach 1:
The system implements on-demand system information provision where UEs can request SIB1 when needed, and the base station provides it only in response to such requests. This eliminates the need for continuous broadcasting while ensuring information availability when required by users.
Solution Approach 2:
The base station changes the provision mode of system information from static (always provided) to dynamic (conditionally provided based on UE requests and traffic conditions). This allows the system to adapt information availability to actual needs, reducing energy consumption when no requests are pending.
3Speed
If the UE continuously monitors for system information and access opportunities, then connectivity responsiveness is improved, but UE power consumption increases
Solution Approach 1:
The UE monitors for SSB and system information periodically rather than continuously, synchronizing its monitoring schedule with the base station's transmission periods. This reduces UE power consumption while maintaining the ability to detect and access the network when opportunities arise.
Data Source
AI summary
A method and device for a User Equipment (UE) are disclosed. In one embodiment, the UE receives an indication on a Synchronization Signal Block (SSB) with one SSB index indicating whether a first system information is provided or broadcasted or not. The UE also determines whether to initiate a random access procedure to request the first system information on a serving cell based on the indication.