Beam Switching Gap Based on UE Capability
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Solution Overview
Problem
In wireless communication systems, especially with high carrier frequencies, frequent beam switching can result in increased overhead and reduced network reliability due to the UE's limited capability to process beam switching commands in time, leading to potential failures in switching between beams for scheduled communications.
Innovation Solution
The UE transmits a capability report indicating a minimum time interval between starting symbols of communications associated with different beam indications, allowing the base station to schedule communications such that the starting symbol of one communication is not within this interval of another, ensuring the UE has sufficient time to process beam switching commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If beam switching is performed frequently to support high carrier frequencies, then spectral efficiency and communication performance are improved, but network reliability deteriorates due to UE processing limitations
Solution Approach 1:
The UE reports its beam switching capability (minimum time interval) to the base station in advance. The base station then uses this information to schedule communications with appropriate gaps between beam switches, ensuring the UE has sufficient processing time before each beam switch occurs.
2Adaptability or versatility
If beam switching commands are sent frequently, then communication flexibility is improved, but processing time requirements increase beyond UE capability
Solution Approach 1:
The UE provides feedback to the base station about its beam switching capability through a capability report. The base station uses this feedback information to adapt its scheduling decisions, inserting appropriate beam switching gaps between communications that require different beam indications.
3Reliability
If beam switching gaps are inserted to accommodate UE processing capability, then network reliability is improved, but spectral efficiency deteriorates due to reduced communication opportunities
Solution Approach 1:
The beam switching gap insertion is dynamic and adaptive rather than fixed. The base station schedules gaps only when necessary, based on the UE's reported capability and the specific communication requirements. Communications can be scheduled back-to-back when they use the same beam indication, maximizing spectral efficiency while maintaining reliability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to abase station, a UE capability report including an indication of a minimum time interval between starting symbols of communications associated with different beam indications. The UE may receive, from the base station, a first beam indication associated with a first communication, wherein the first communication is scheduled such that a starting symbol of the first communication is not within the minimum time interval of a starting symbol of a second communication associated with a second beam indication that is different from the first beam indication. Numerous other aspects are described.