BWP Switching in Wireless Devices for Uplink Resource Management
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Solution Overview
Problem
Existing multicarrier communication systems face challenges in efficiently managing carrier aggregation, HARQ buffer management, and interworking between different radio access technologies, leading to suboptimal performance in terms of resource allocation and user equipment connectivity.
Innovation Solution
The implementation of advanced scheduling request mechanisms and HARQ buffer management techniques within multicarrier communication systems, along with tight interworking architectures between 5G and LTE RANs, enables more efficient resource allocation and improved connectivity for user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented in multicarrier communication systems, then system capacity and resource allocation are improved, but device complexity and management overhead increase
Solution Approach 1:
The patent segments the wide bandwidth into multiple component carriers (CCs), each operating independently with its own physical channels and resources. This segmentation allows the system to achieve high capacity through carrier aggregation while managing complexity by treating each CC as a manageable unit with standardized procedures for scheduling, HARQ, and resource allocation.
Solution Approach 2:
The patent implements universal HARQ entity structures and scheduling mechanisms that can operate across multiple component carriers with different numerologies. The HARQ entity is designed to handle acknowledgments and retransmissions uniformly across all aggregated carriers, providing a multi-functional solution that reduces management overhead despite the diversity of carrier configurations.
2Adaptability or versatility
If different numerologies are supported across component carriers, then system adaptability and service flexibility are improved, but scheduling complexity and resource management difficulty increase
Solution Approach 1:
The patent employs dynamic scheduling mechanisms where the network can flexibly assign different numerologies (subcarrier spacings, cyclic prefix types) to different component carriers based on service requirements. The scheduling entity can adaptively adjust resource allocation, HARQ timing, and physical channel parameters for each carrier independently, enabling the system to handle diverse services (eMBB, URLLC, mMTC) while managing complexity through centralized control.
3Productivity
If HARQ buffer management is optimized across multiple component carriers, then resource utilization efficiency is improved, but processing complexity and memory management overhead increase
Solution Approach 1:
The patent merges the HARQ buffer management across multiple component carriers into a unified structure where the HARQ entity can share buffer resources and coordination mechanisms. This allows efficient utilization of HARQ buffers by pooling resources across carriers while reducing redundant management overhead through centralized control and standardized buffer allocation procedures that apply uniformly across all aggregated carriers.
Data Source
AI summary
A wireless device receives one or more messages comprising configuration parameters, of a cell, indicating a first bandwidth part (BWP) and a second BWP. The wireless device receives a first downlink control information (DCI) scheduling one or more first uplink resources for a first transmission of a first uplink transport block (TB) via the first BWP of the cell. The wireless device receives, before the first transmission of the first uplink TB, a second DCI indicating: a switching from the first BWP to the second BWP of the cell, one or more second uplink resources for a second transmission of a second uplink TB via the second BWP. In response to the receiving the second DCI before the first transmission of the first uplink TB, the wireless device does not transmit the first transmission of the first uplink TB, and transmits the second uplink TB via the second BWP.