Cell Initial Access via On-Demand SIB Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing network energy consumption, particularly due to wasteful synchronization signal and broadcast channel (SS/PBCH) transmissions when no user equipment (UE) is attempting to access the cell.
Innovation Solution
The proposed solution involves implementing sensing-based adaptation of SS/PBCH transmissions, adaptive cell measurement, and neighbor cell-assisted initial access procedures. These methods leverage integrated sensing and AI/ML capabilities to dynamically adjust transmission patterns and resource allocations based on detected UE activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SS/PBCH transmissions are continuously performed to ensure initial access capability, then reliability of initial access is improved, but energy consumption increases
Solution Approach 1:
The patent implements discontinuous SS/PBCH transmissions where the base station transmits these signals only at specific periodic intervals rather than continuously. This periodic transmission pattern maintains initial access capability for UEs that need to synchronize while significantly reducing energy consumption during periods when no access is required.
Solution Approach 2:
The patent introduces dynamic adaptation mechanisms where the base station adjusts SS/PBCH transmission patterns based on detected UE activity and channel conditions. When UE access attempts are detected or channel conditions warrant it, transmissions are activated; otherwise, they are suspended or reduced, creating a dynamic system that balances reliability and energy efficiency.
2Use of energy by moving object
If on-demand SIB transmission is implemented to reduce energy consumption, then energy efficiency is improved, but initial access speed may be degraded
Solution Approach 1:
The patent implements preliminary actions by having the base station transmit essential system information (MIB and SIB1) in advance during periodic SS/PBCH transmissions or through pre-fetching mechanisms. This ensures that when a UE needs to access the network, the critical information is already available or quickly retrievable, minimizing access time while maintaining on-demand transmission for other SIBs to save energy.
Solution Approach 2:
The patent segments system information into different priority levels: essential information (MIB, SIB1) that is transmitted more frequently or in advance, and non-essential SIBs that are transmitted on-demand. This segmentation allows the network to optimize energy consumption for less critical information while ensuring rapid access to crucial system information, thereby balancing energy efficiency with access speed.
Data Source
AI summary
Various aspects of the present disclosure relate to receiving, via a first cell, first system information (SI) comprising an indication of a neighboring cell in an energy saving state, and transmitting a request signal to the neighboring cell. Aspects of the present disclosure may relate to receiving, from the neighboring cell, an on-demand system information block (SIB) transmission comprising essential SI for the neighboring cell, where the essential SI comprises a master information block (MIB) for the neighboring cell, or a SIB type 1 (SIB1) for the neighboring cell, or a combination thereof.