RF Retuning for Bandwidth Part Without SSB Restriction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing bandwidth parts (BWP) without restrictions, particularly in relation to synchronization signal blocks (SSB) and control resource set zero (CS0), which can lead to congestion and decreased flexibility in resource allocation.
Innovation Solution
A method and apparatus for user equipment (UE) to perform radio frequency (RF) retuning to a union bandwidth that covers both the active BWP and the bandwidth associated with SSB or CS0, allowing for configuration of BWPs without the necessity of including SSB or CS0 bandwidth, thereby mitigating congestion and enhancing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If BWP is configured to include SSB or CS0 bandwidth, then reliability of signal reception is improved, but flexibility in bandwidth allocation deteriorates
Solution Approach 1:
The patent segments the bandwidth into two independent parts: the active BWP for data transmission and the SSB/CS0 bandwidth for control signals. This allows the active BWP to be configured without being constrained by the location of SSB or CS0, enabling flexible bandwidth allocation while maintaining separate dedicated resources for control signals, thus resolving the contradiction between reliability and flexibility
2Ease of operation
If BWP is restricted to SSB or CS0 frequencies, then ease of operation is improved, but spectral efficiency deteriorates
Solution Approach 1:
The patent extracts the SSB and CS0 bandwidth requirements from the active BWP configuration. By separating these control signal bandwidth needs from the data transmission bandwidth, the system allows active BWPs to be configured independently at optimal locations for spectral efficiency, while SSB and CS0 are placed in dedicated bandwidth regions, thus resolving the contradiction between ease of operation and spectral efficiency
3Adaptability or versatility
If RF retune is performed frequently to cover union bandwidth, then adaptability is improved, but power consumption increases
Solution Approach 1:
The patent performs preliminary configuration of the active BWP without including SSB or CS0 bandwidth, allowing the UE to operate efficiently in the active BWP. When SSB or CS0 reception is needed, the UE can quickly retune to the union bandwidth since the active BWP is already configured at the optimal location, reducing the frequency and energy cost of RF retuning while maintaining adaptability
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, information configuring an active bandwidth part (BWP) that does not include a bandwidth associated with one or more of a synchronization signal block (SSB) or a control resource set zero (CS0). The UE may perform, based at least in part on a radio frequency (RF) retune mode, an RF retune to a union bandwidth that covers the active BWP and the bandwidth associated with one or more of the SSB or the CS0. Numerous other aspects are described.