PBCH Reception Sequencing for Reduced-Capability 5G WTRUs
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Solution Overview
Problem
Existing systems face challenges in efficiently detecting and receiving a physical broadcast channel (PBCH) for reduced capability wireless transmit/receive units (WTRUs) in 5G new radio (NR) networks, particularly in determining the location and format for receiving master information blocks (MIBs) and system information blocks (SIBs.
Innovation Solution
A wireless transmit/receive unit (WTRU) receives a first MIB via a physical broadcast channel (PBCH) to determine the location or format for receiving a second MIB, using configuration information for a first control resource set (CORESET), and subsequently receives a system information block (SIB) using the second MIB, which may be smaller than the first CORESET.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a legacy WTRU receives a first MIB via PBCH, then the WTRU can obtain basic system information, but the WTRU cannot determine the location or format for receiving a second MIB without additional configuration
Solution Approach 1:
The patent applies preliminary action by including in the first MIB (received via PBCH) configuration information that预先 specifies the location and format for receiving the second MIB. This preliminary configuration allows the WTRU to automatically determine where to find the second MIB without requiring complex additional configuration or manual setup, thus resolving the contradiction between information completeness and device complexity.
2Ease of operation
If a reduced capability WTRU receives configuration information for a first CORESET, then the WTRU can determine the first location or format for receiving the second MIB, but the WTRU may still struggle to determine the second location or format for receiving SIB
Solution Approach 1:
The patent applies feedback by having the second MIB (received via PDCCH using the first CORESET configuration) include configuration information about the second CORESET, which in turn specifies the location and format for receiving SIB. This feedback mechanism ensures that each received message provides the necessary configuration information for the next reception step, making the process systematic and reducing detection difficulty for reduced capability WTRUs.
3Device complexity
If the second CORESET is smaller than the first CORESET, then the WTRU can reduce processing requirements, but the WTRU must accurately determine the second location or format based on previous configuration
Solution Approach 1:
The patent applies parameter changes by systematically reducing the CORESET size from the first to the second CORESET, and by using configuration information (parameters) carried in the messages to precisely determine the location and format. This controlled parameter reduction, guided by explicit configuration information, allows the WTRU to simplify processing while maintaining accurate location determination through the configuration parameters provided in each message.
Data Source
AI summary
Systems, methods, and instrumentalities are described herein for detection and reception of a physical broadcast channel (PBCH). A wireless transmit/receive unit (WTRU) may receive a first master information block (MIB). The WTRU may determine a first location or format for receiving a second MIB based on the contents of the first MIB. The contents of the first MIB may include first configuration information for a first control resource set (CORESET). The WTRU may receive the second MIB. The second MIB may be received using the first location or format. The WTRU may determine a second location or format associated with receiving a system information block (SIB) based on the contents of the second MIB. The contents of the second MIB may include second configuration information for a second CORESET. The WTRU may receive the SIB. The SIB may be received based on the second location or format.