Master Bandwidth Configuration for Duplex BWP Switching
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Solution Overview
Problem
Wireless communication systems, particularly in 4G and 5G networks, face challenges with interference and latency due to half-duplex and full-duplex communications, which affect the reliability and efficiency of uplink and downlink communications between user equipment (UE) and base stations, especially when switching between bandwidth parts (BWPs).
Innovation Solution
Configuring user equipment (UE) to identify and utilize a master resource bandwidth within a set of allocated resource bandwidths for duplex communications, which acts as a default and active bandwidth unless explicitly signaled by the base station, thereby improving BWP operations and reducing latency and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE switches between multiple bandwidth parts (BWPs) for duplex communications, then the adaptability and spectral efficiency are improved, but the latency and reliability deteriorate due to switching delays and interference
Solution Approach 1:
The system pre-configures multiple bandwidth parts (BWPs) with different bandwidth characteristics before communication begins. The UE and base station have predetermined BWP configurations ready, allowing immediate switching without calculation or setup delays when conditions change, thus reducing switching latency while maintaining adaptability.
Solution Approach 2:
The patent implements dynamic BWP switching where the active bandwidth part can change based on communication conditions. The system allows the UE to switch between pre-configured BWPs with different bandwidths, enabling flexible adaptation to varying traffic demands while maintaining ready-to-use configurations to minimize switching time.
2Productivity
If the UE uses full-duplex communications over multiple BWPs, then the productivity and spectral efficiency are improved, but the harmful factors (interference) increase
Solution Approach 1:
The system divides the available bandwidth into multiple separate bandwidth parts (BWPs), each potentially allocated for specific communication directions (uplink or downlink). This segmentation allows simultaneous full-duplex operations on different BWPs while isolating interference between them, as each BWP acts as an independent frequency resource block.
Solution Approach 2:
Different bandwidth parts are assigned different functional characteristics - some BWPs are designated for uplink, others for downlink. This local differentiation of resource quality allows the system to optimize each BWP for its specific purpose while maintaining overall full-duplex capability, reducing cross-direction interference through localized resource specialization.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A communication device, otherwise known as a user equipment (UE), may identify a set of resource bandwidths of a bandwidth part (BWP) based on a BWP configuration. The UE may, for example, receive the BWP configuration from a network (e.g., a base station in wireless communication with the UE). The UE may determine that at least one resource bandwidth of the set of resource bandwidths is a master resource bandwidth (also referred to as a default resource bandwidth). The UE may communicate with a base station using the master resource bandwidth of the set of resource bandwidths for the BWP. Alternatively, the UE may communicate with the base station using another resource bandwidth of the set of resource bandwidths for the BWP.