Wireless Forwarding Node RMSI and SSB Transmission Management
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Solution Overview
Problem
Analog repeaters in wireless communication systems face scalability and efficiency issues when forwarding synchronization signal blocks (SSBs) and remaining minimum system information (RMSI) transmissions due to their inability to store information, requiring real-time processing and repeated transmissions, which consumes significant network and computing resources.
Innovation Solution
A wireless forwarding node receives semi-static configuration information to forward RMSI physical downlink control channels (PDCCH) and stores RMSI physical downlink shared channel (PDSCH) content, allowing for efficient transmission without repeated copies from the transmitter node, and manages demodulation reference signals (DMRS) by regenerating DMRS sequences based on new time resources, reducing the burden on the base station and repeaters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If analog repeaters forward SSB and RMSI transmissions in real-time without storage capability, then the system maintains simplicity in architecture, but network and computing resources are significantly consumed due to repeated transmissions
Solution Approach 1:
The patent applies preliminary action by having the base station pre-process and prepare RMSI and SSB information before transmission to the repeater. The repeater stores this information in its memory and forwards it when needed, eliminating the need for real-time processing and repeated transmissions from the base station, thus reducing network and computing resource consumption.
2Speed
If analog repeaters perform real-time processing of RMSI PDCCH and RMSI PDSCH, then the transmission timing is maintained, but scalability is limited due to the inability to store information
Solution Approach 1:
The patent introduces a digital storage component as an intermediary between the base station and the wireless repeater. The repeater's memory stores RMSI and SSB information, acting as a buffer that decouples the timing requirements of the base station and the repeater. This allows the system to scale by adding more repeaters without requiring each to perform complex real-time processing.
3Device complexity
If base station transmits repeated copies of RMSI PDSCH to repeater, then the repeater can forward information without storage, but the base station's processing burden increases
Solution Approach 1:
The patent applies the copying principle by having the base station transmit a single copy of the RMSI PDSCH to the repeater, which stores it in its memory. The repeater then uses this stored copy to generate multiple forward transmissions to different user equipment. This eliminates the need for the base station to transmit repeated copies, thereby reducing its processing burden and improving efficiency.
4Device complexity
If repeater forwards signals without regenerating DMRS sequences, then the forwarding process is simpler, but signal processing correctness deteriorates
Solution Approach 1:
The patent applies parameter changes by having the repeater regenerate DMRS sequences with updated parameters (such as time resource allocations and scrambling identifiers) when forwarding signals. This ensures that the DMRS sequences remain synchronized with the current transmission conditions, maintaining signal processing correctness and reliability while allowing the repeater to perform intelligent signal regeneration rather than simple analog forwarding.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless forwarding node may receive, from a control node via a fronthaul control interface, semi-static configuration information indicating one or more parameters for forwarding a remaining minimum system information (RMSI) physical downlink control channel (PDCCH). The wireless node may receive, from a transmitter node, information associated with an RMSI PDCCH that schedules transmission of an RMSI physical downlink shared channel (PDSCH) that carries RMSI associated with an access procedure. The wireless node may transmit an RMSI PDCCH to one or more receiver nodes based at least in part on the received information and the semi-static configuration information. Numerous other aspects are provided.