Distributed Station BWP Aggregation via Wireless Device Switching
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Solution Overview
Problem
In 5G NR radio access networks, terminals cannot simultaneously use multiple bandwidth parts (BWP) due to the limitations of existing configurations, which restrict their ability to perform BWP aggregation, leading to delayed service connections and difficulties in providing multiple services across different DU services.
Innovation Solution
A distributed station and terminal communication method that enables BWP aggregation by switching between wireless devices, using signaling from the base station to instruct the terminal on wireless device switching and BWP aggregation, allowing simultaneous connection to multiple BWPs through the coordination of centralized and distributed units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal uses existing 5G NR radio access network configuration, then the system maintains standard compatibility and simple architecture, but the terminal cannot perform BWP aggregation leading to delayed service connections and limited service diversity
Solution Approach 1:
The base station is segmented into a centralized unit (CU) and a distributed unit (DU), allowing the CU to manage higher-layer protocols and the DU to handle lower-layer radio access functions. This segmentation enables the terminal to aggregate BWPs from multiple DUs while the CU maintains overall system coordination, thus achieving BWP aggregation capability without overwhelming system complexity.
Solution Approach 2:
The centralized unit acts as an intermediary between multiple distributed units and the terminal. It receives service requests from the terminal, coordinates BWP aggregation across multiple DUs, and manages the terminal context, thereby enabling complex BWP aggregation functionality through a mediating control entity that abstracts the complexity from the terminal.
2Productivity
If the terminal connects to multiple BWPs simultaneously, then service connection speed and service diversity improve, but the coordination complexity between centralized and distributed units increases
Solution Approach 1:
The centralized unit pre-establishes terminal contexts and configures BWP aggregation parameters before the terminal actually needs to access multiple services. By preparing the aggregation framework in advance, the system enables rapid service connection when needed without incurring coordination complexity during the actual service access moment.
Solution Approach 2:
The system creates equipotential coordination by establishing standardized interfaces and protocols between the CU and multiple DUs. This standardization ensures that coordinating multiple BWPs across different DUs follows uniform procedures, reducing the perceived complexity of multi-BWP coordination while maintaining high service connection speed.
3Adaptability or versatility
If the terminal performs BWP aggregation across different DU services, then service diversity and connectivity improve, but the signaling overhead and control complexity increase
Solution Approach 1:
The centralized unit is designed as a universal control entity that can manage multiple DUs and multiple BWPs through a single set of protocols and interfaces. This multi-functionality allows the CU to handle diverse service requirements across different DUs without requiring separate signaling mechanisms for each BWP, thereby reducing overall signaling overhead while maintaining service diversity.
Data Source
AI summary
A distributed station includes receiver circuitry which, in operation, receives information regarding wireless device switching from a terminal via a first wireless device, and controller circuitry which, in operation, determines, based on the information, switching from the first wireless device to a second wireless device and bandwidth part (BWP) aggregation in the second wireless device.