Bandwidth Part Switching for Inter-Cell Mobility Latency
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing inter-cell mobility, particularly in switching between different bandwidth parts (BWP) associated with various cells, which leads to increased latency and resource consumption.
Innovation Solution
The proposed solution involves an apparatus and method for wireless communication that allows a user equipment (UE) to switch from a first transmission configuration indicator (TCI) state associated with a first cell to a second TCI state associated with a second cell, including switching from a first BWP to a second BWP, thereby facilitating inter-cell mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional inter-cell mobility switching is used, then cell handover can be achieved, but latency increases and processing resources are consumed
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple bandwidth parts (BWPs) at the UE before mobility switching is needed. The network entity provides BWP configuration information including multiple BWPs with different numerologies in advance, so when inter-cell mobility is required, the UE can immediately switch to a pre-configured BWP without waiting for configuration messages, thereby reducing latency and avoiding additional processing overhead.
2Adaptability or versatility
If multiple BWP configurations are maintained for different cells, then inter-cell mobility flexibility is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent applies universality by designing a BWP configuration mechanism where a single BWP configuration message from the network entity can serve multiple purposes: it configures BWPs for the current cell and simultaneously prepares BWPs for potential target cells. This multi-functional approach allows the UE to handle inter-cell mobility using the same configuration framework, reducing the need for separate configuration procedures and thereby lowering power consumption while maintaining mobility flexibility.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication to switch from a first transmission configuration indicator (TCI) state associated with a first cell to a second TCI state associated with a second cell. The UE may apply the second TCI state, including switching from a first bandwidth part (BWP) associated with the first cell to a second BWP associated with the second cell. For example, the UE may receive an indication to switch from the first BWP to the second BWP. Additionally, or alternatively, the UE may determine to switch from the first BWP to the second BWP based at least in part on the indication to switch from the first TCI state to the second TCI state. Numerous other aspects are described.