Scheduling Request Occasions Mapped to SSBs for Aperiodic Uplink
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in scheduling request (SR) processes for reduced-capability UEs, particularly in managing beam management and power consumption due to aperiodic and unpredictable uplink traffic, leading to suboptimal resource allocation and increased power usage.
Innovation Solution
Configuring scheduling request occasions (SROs) that are mapped to synchronization signal blocks (SSBs) to facilitate event-triggered beam determination, allowing UEs to transmit SRs on specific SROs associated with received SSBs, thereby reducing the need for frequent beam management and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional scheduling request processes are used for reduced-capability UEs, then UEs can transmit SRs for aperiodic uplink traffic, but beam management overhead and power consumption increase
Solution Approach 1:
The patent combines scheduling request (SR) transmission with random access channel (RACH) procedures by configuring SROs that overlap with RACH occasions. This merging allows reduced-capability UEs to transmit SRs for aperiodic uplink traffic without requiring separate dedicated SR resources, thereby reducing beam management overhead and power consumption while maintaining resource allocation efficiency
Solution Approach 2:
The configured SROs serve multiple functions: they enable SR transmission for aperiodic traffic, provide beam management capabilities through SSB associations, and integrate with RACH procedures. This multi-functionality eliminates the need for separate dedicated SR resources, reducing overall system complexity and power consumption for reduced-capability UEs
2Reliability
If frequent beam management is performed to handle aperiodic traffic, then uplink communication reliability is maintained, but computing resources and power are wasted
Solution Approach 1:
The patent implements periodic beam management through associations between SROs and SSBs, where beam determination is performed only when needed based on pre-configured mappings. This periodic approach maintains uplink communication reliability by ensuring beams are updated when traffic occurs, while avoiding continuous beam management that would waste computing resources and power for reduced-capability UEs with aperiodic traffic patterns
3Ease of operation
If dedicated SR resources are allocated for reduced-capability UES, then SR transmission capability is improved, but resource allocation overhead increases
Solution Approach 1:
The patent merges SR transmission with existing RACH procedures by configuring SROs that overlap with RACH occasions. This eliminates the need for separate dedicated SR resources for reduced-capability UEs, reducing resource allocation overhead while maintaining SR transmission capability through the shared physical resources
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive configuration information indicating a set of scheduling request (SR) occasions (SROs), wherein the configuration information identifies a set of mappings between the set of SROs and a set of synchronization signal blocks (SSBs); receive an SSB of the set of SSBs; and transmit one or more SRs on one or more selected SROs associated with the received SSB based at least in part on the set of mappings. Numerous other aspects are provided.