Uplink Resource Mapping for Simplified SSB Cell Access
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Solution Overview
Problem
In wireless communication systems using simplified synchronization signal blocks (SSBs), UEs face challenges in identifying uplink resources for initial access and uplink cell wake-up signals due to the absence of a physical broadcast channel, leading to potential transmission collisions and unreceived signals.
Innovation Solution
Implementing uplink resource mapping that associates identifiers from simplified SSBs with specific uplink resources, enabling UEs to accurately identify and utilize these resources for initial access and uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If simplified SSBs are used to reduce radio resource usage, then resource efficiency is improved, but UE ability to identify uplink resources deteriorates
Solution Approach 1:
The patent introduces an intermediary mapping mechanism that connects the simplified SSB identifier to uplink resources. The network node provides a mapping indication (e.g., via system information or RRC signaling) that acts as a mediator, allowing UEs to translate the limited identifier from simplified SSB into the corresponding uplink resource without requiring full SSB content.
Solution Approach 2:
The network node performs preliminary action by pre-configuring and signaling the mapping relationship between simplified SSB identifiers and uplink resources before UE transmission. This advance preparation ensures UEs have the necessary resource identification information available when they need to transmit, eliminating the information loss caused by simplified SSBs.
2Loss of energy
If simplified SSBs are used to reduce radio resource usage, then resource efficiency is improved, but transmission collision probability increases
Solution Approach 1:
The mapping indication serves as an intermediary that ensures unique and correct association between simplified SSB identifiers and uplink resources. This mediator prevents multiple UEs from selecting the same uplink resource by providing a deterministic translation mechanism from SSB identifier to resource allocation.
Solution Approach 2:
The network node provides feedback to UEs through the mapping indication, enabling UEs to correctly identify their assigned uplink resources based on their detected simplified SSB. This feedback mechanism ensures reliable resource allocation and prevents collisions by informing UEs of the correct resource to use.
3Productivity
If simplified SSBs are used, then network resource utilization is improved, but UE configuration complexity increases
Solution Approach 1:
The mapping indication acts as a simplified intermediary that bridges the gap between simplified SSB and uplink resource identification. Instead of requiring complex UE logic to interpret simplified SSB directly, the mapping indication provides a straightforward translation mechanism that reduces UE configuration complexity while maintaining network efficiency.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, an apparatus may receive a simplified synchronization signal block (SSB). The apparatus may transmit an uplink communication using an uplink resource associated with an identifier indicated by the simplified SSB. Numerous other aspects are described.