Secondary Cell Beam Synchronization With Reduced Beam Search
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing synchronization and beamforming for secondary cells, particularly in scenarios where initial beam searches are resource-intensive and time-consuming.
Innovation Solution
The implementation of a reduced candidate beams list and a reduced time domain range for initial beam searches in synchronization with a primary cell to facilitate faster and more efficient activation of secondary cells, utilizing reference signals for synchronization and beam pair identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a full candidate beams list is used for initial beam search in SCell activation, then beam search completeness is improved, but time consumption and resource requirements increase
Solution Approach 1:
The patent applies preliminary action by performing beam search in the primary cell before SCell activation, establishing a candidate beam list in advance. This pre-established beam information is then reused during SCell activation, eliminating the need for a complete beam search and significantly reducing activation time while maintaining reliability.
Solution Approach 2:
The patent applies local quality by using different beam search strategies for different cells. The primary cell undergoes a complete beam search to establish a comprehensive candidate beam list, while the secondary cell utilizes this pre-established information, requiring only limited beam verification. This differentiated approach optimizes resource allocation across different cell types.
2Productivity
If a reduced candidate beams list is used for initial beam search in SCell activation, then time consumption is reduced, but beam search completeness may deteriorate
Solution Approach 1:
The patent ensures reliability despite using a reduced beam list by performing the comprehensive beam search in the primary cell first. The resulting candidate beam list serves as a pre-validated foundation for SCell activation, guaranteeing that only beams proven to be viable are considered, thus maintaining search completeness while accelerating SCell activation.
Solution Approach 2:
The patent introduces an intermediary mechanism where the primary cell's beam search results act as a mediator for the secondary cell's beam search. The candidate beam list generated from primary cell measurements serves as intermediate information that bridges the gap between complete beam search requirements and reduced activation time, enabling reliable fast activation.
3Use of energy by moving object
If synchronization with PCell is utilized for SCell beam search, then resource requirements are reduced, but synchronization complexity increases
Solution Approach 1:
The patent applies merging by combining the beam search processes of the primary cell and secondary cell. The candidate beam list generation and beam search operations are merged into a unified process where PCell synchronization results are directly utilized for SCell activation. This integration reduces redundant operations and energy consumption while the complexity is managed through standardized procedures.
Solution Approach 2:
The patent applies universality by making the PCell synchronization mechanism serve multiple functions: it provides timing reference for SCell activation, generates the candidate beam list, and enables beam pair identification for SCell. This multi-functional approach reduces overall system complexity despite the interconnected nature of the operations.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may obtain synchronization with a primary cell (PCell) of a wireless network. The UE may receive an indication to activate a secondary cell (SCell) of the wireless network. The UE may receive a reference signal (RS) of the SCell, reception of the RS of the SCell, based at least in part on obtaining synchronization with the PCell, comprising one or more of: using a reduced candidate beams list for an initial beam search or using a reduced time domain range for receiving the RS of the SCell. The UE may communicate via the SCell based at least in part on synchronization with the SCell and using a beam pair obtained using the RS of the SCell. Numerous other aspects are described.