Supplemental Carrier Selection for Multi-BWP Random Access
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Solution Overview
Problem
Existing technologies face challenges in efficiently managing random access procedures in multicarrier communication systems, particularly in terms of channel allocation and resource management across multiple carriers.
Innovation Solution
The implementation of a new radio access network architecture that employs advanced channel mapping and resource allocation mechanisms, including Bandwidth Parts (BWP) and dynamic modulation and coding schemes, to optimize random access procedures in multicarrier systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional random access procedures are used in multicarrier systems, then device complexity is reduced, but channel utilization efficiency deteriorates
Solution Approach 1:
The patent divides the carrier bandwidth into multiple Bandwidth Parts (BWPs), each with different numerologies (subcarrier spacings). This segmentation allows the system to allocate resources more efficiently by matching appropriate BWPs to different service requirements, thereby improving channel utilization efficiency while managing complexity through standardized segmentation patterns.
Solution Approach 2:
The patent implements dynamic BWP switching and adaptive numerology selection based on channel conditions and service requirements. The system dynamically adjusts which BWP is active and which numerology is used for random access procedures, optimizing channel utilization in real-time while managing device complexity through controlled dynamic behavior.
2Adaptability or versatility
If multiple active downlink bandwidth parts are configured, then adaptability to different services is improved, but device complexity increases
Solution Approach 1:
The patent designs a universal BWP configuration mechanism that can accommodate multiple services with different numerologies within a single carrier. The supplemental carrier selection procedure provides a standardized approach for handling multiple active downlink BWPs, enabling the system to serve diverse service requirements without proportionally increasing device complexity.
Solution Approach 2:
The patent changes key parameters such as subcarrier spacing, cyclic prefix length, and BWP configuration based on service requirements. By dynamically adjusting these parameters through the supplemental carrier selection procedure, the system achieves high adaptability to different services while managing complexity through parameterized configurations rather than completely different architectures.
3Productivity
If dynamic BWP switching is implemented, then channel utilization is optimized, but latency in random access procedures increases
Solution Approach 1:
The patent configures multiple BWPs and their associated parameters in advance through network signaling, so that when random access is needed, the system can quickly switch to the appropriate pre-configured BWP without time-consuming configuration procedures. This preliminary setup optimizes channel utilization while minimizing access latency.
Solution Approach 2:
The patent incorporates feedback mechanisms where the network monitors channel conditions and service requirements, then adjusts BWP assignments and numerology selections accordingly. This feedback-driven dynamic switching optimizes channel utilization over time while managing latency through intelligent decision-making based on real-time conditions.
Data Source
AI summary
A wireless device may receive one or more messages comprising one or more configuration parameters for a cell. The cell may comprise a normal uplink (NUL) carrier, a supplementary uplink (SUL) carrier, and a downlink carrier comprising at least two downlink bandwidth parts (BWPs). The wireless device may select, for a random-access procedure of the cell, an uplink carrier among the NUL carrier and the SUL carrier based on a measured quality of each downlink BWP of the at least two downlink BWPs. The uplink carrier may be the NUL carrier based on the measured quality of each downlink BWP of the at least two downlink BWPs being equal or greater than an uplink carrier threshold. The wireless device may transmit, via the NUL, a random-access preamble for the random-access procedure.