5G UE Cell Camping for High-KSSB SIB1 Acquisition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for wireless data traffic in 5G communication systems, particularly in higher frequency bands, poses challenges in efficient radio interface efficiency and coverage, especially in acquiring system information blocks (SIB1) due to high subcarrier offsets exceeding 24.
Innovation Solution
A user equipment (UE) and base station (BS) system is designed to handle high subcarrier offsets by transmitting and receiving master information blocks (MIB) and system information block 1 (SIB1) requests, enabling efficient camping in cells with enhanced beamforming and multiple access schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors PDCCH for SIB1 transmission in cells with high subcarrier offsets (KSSB ≥ 24), then the UE can acquire SIB1 information, but the monitoring process becomes more complex and time-consuming due to the extended search space requirements
Solution Approach 1:
The patent applies preliminary action by having the UE determine the SIB1 request configuration and monitor for SIB1 transmission in advance, before actual connection establishment. The UE proactively identifies cells with KSSB ≥ 24 and prepares the appropriate request configuration, enabling efficient SIB1 acquisition without increasing operational complexity during critical connection phases
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the monitoring based on the KSSB value. When KSSB ≥ 24, the UE changes its monitoring parameters to specifically target SIB1 transmission on the first active downlink bandwidth part (DL BWP) with the appropriate request configuration, optimizing the search process for high-offset cells without requiring complex general monitoring across all cell types
2Reliability
If the UE requests SIB1 in cells with high subcarrier offsets, then the UE can obtain necessary system information, but the time to acquire SIB1 increases due to the extended search and monitoring processes
Solution Approach 1:
The patent applies preliminary action by having the UE determine the SIB1 request configuration and identify target cells in advance. The UE proactively determines which cells have KSSB ≥ 24 and prepares the request configuration beforehand, so when connection is needed, the UE can quickly transmit the request and receive SIB1 without time-consuming search processes
Solution Approach 2:
The patent ensures continuity of useful action by maintaining persistent monitoring for SIB1 transmission in cells with KSSB ≥ 24. The UE continuously monitors the PDCCH on the first active downlink bandwidth part with the specific request configuration, ensuring that SIB1 transmission is captured as soon as it occurs without interruption or delay in the acquisition process
Data Source
AI summary
A method of operating a user equipment (UE) includes receiving a master information block (MIB) of a first cell on a carrier frequency belonging to a first frequency range (FR1). The method also includes, determining a first subcarrier offset (KSSB) based on ssb-SubcarrierOffset information in the MIB received on the carrier frequency belong to FR1, determining whether the first KSSB is greater than or equal to 24, and determining whether the UE has a system information block 1 (SIB1) request configuration of the first cell. The method also includes, in response to a determination that the first KSSB is greater than or equal to 24 and a determination that the UE has the SIB1 request configuration of the first cell, transmitting, to the first cell, a request for the SIB1 of the first cell.