SIB1 Transmission Across Multiple Slots for 5G Coverage
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Solution Overview
Problem
In 5G wireless networks, the existing synchronization signal/physical broadcast channel (SSB) patterns face challenges such as limited coverage and capacity due to regulation limitations and the need for efficient multiplexing with control resource sets (CORESET) and uplink transmissions.
Innovation Solution
The proposed solution involves modifying the CORESET 0 configuration to allow for multiple slots per SSB, enabling SIB1 transmission across multiple slots to ensure similar coverage and capacity compared to SSB transmissions. This is achieved by increasing the M value in the CORESET multiplexing patterns, allowing for more opportunities for SIB1 transmission, especially in case of Listen Before Talk (LBT) failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If SSB patterns are used for synchronization and broadcast, then coverage is limited due to regulation constraints, but increasing transmission power is not feasible
Solution Approach 1:
The patent segments the SIB1 transmission across multiple slots (e.g., 2, 4, or 8 slots) instead of transmitting in a single slot. This segmentation allows the same information to be transmitted repeatedly over time, extending the effective coverage area without requiring increased transmission power in any single instance.
Solution Approach 2:
The patent implements periodic transmission of SIB1 across multiple slots with regular intervals. The SIB1 is transmitted in a first slot, repeated in subsequent slots according to a configured pattern, and potentially retransmitted in later slots. This periodic action ensures that users at the edge of coverage can eventually receive the signal without requiring higher peak power.
2Reliability
If multiple slots are used for SIB1 transmission, then transmission reliability improves, but transmission time increases
Solution Approach 1:
The patent employs partial repetition of SIB1 across multiple slots rather than transmitting completely new information in each slot. The same SIB1 content is repeated in selected slots, providing redundancy for reliability while limiting the time extension to only the necessary number of repetitions. The network can configure the exact number of repetitions based on coverage requirements.
Solution Approach 2:
The patent performs preliminary configuration of the SIB1 transmission parameters including the number of slots, repetition pattern, and timing before actual transmission. This preliminary setup optimizes the balance between reliability and time by pre-determining the minimum necessary repetitions rather than using excessive time for all transmissions.
3Area of stationary object
If SIB1 transmission is repeated across multiple slots, then coverage extends to edge users, but system resources are consumed
Solution Approach 1:
The patent changes the temporal parameters of SIB1 transmission by distributing it across multiple slots with specific timing patterns. Instead of using more frequency resources or power, the system adjusts the time-domain parameters (number of slots, repetition intervals) to extend coverage. This parameter optimization achieves extended coverage while consuming only the necessary time resources.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods to provide repetition of system information block type 1 in a plurality of slots.