Semi-Persistent Scheduling Enhancements for XR Traffic Alignment

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently managing Semi-Persistent Scheduling (SPS) configurations to align with Extended Reality (XR) traffic patterns, particularly in handling variable packet sizes and uncertain packet arrival times, which leads to resource wastage and power consumption issues.

Innovation Solution

Enhancements to SPS configurations are introduced to accommodate non-integer periodicities, flexible resource allocations, and dynamic adjustments based on packet size and arrival times, allowing for more precise alignment with XR traffic characteristics, including implicit and explicit Start and Length Indicators for time-domain allocations and dynamic indication of SPS occasions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If SPS configurations use fixed integer periodicities, then resource allocation is simplified, but alignment with XR traffic patterns deteriorates

Engineering Contradiction:

Improveconfiguration simplicityVSAvoidalignment with XR traffic

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent introduces non-integer periodicities for SPS configurations, changing the parameter from fixed integer values to flexible non-integer values. This allows the SPS periodicity to better match the actual XR traffic patterns while maintaining configuration manageability through standardized parameter sets.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent enables dynamic adjustment of SPS periodicity based on traffic conditions. The gNB can configure different periodicities for different SPS occasions, allowing the system to adapt to varying XR traffic patterns rather than being constrained by fixed periodic allocations.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If SPS configurations allocate resources for maximum packet sizes, then all packet sizes can be accommodated, but resource wastage increases

Engineering Contradiction:

Improvepacket size accommodationVSAvoidresource wastage

Core Design Contradiction:

Adaptability or versatilityVSLoss of substance

Solution Approach 1:

The patent applies different resource allocation configurations for different SPS occasions based on the actual packet size requirements. Instead of uniformly allocating resources for maximum packet size across all occasions, the system configures appropriate resource sizes locally for each occasion, matching the actual traffic needs.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent segments the SPS configuration into multiple occasions with different parameter sets. Each occasion can have its own resource allocation, periodicity, and packet size configuration, allowing fine-grained control over resource usage rather than a single monolithic configuration.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If SPS configurations use static resource allocations, then configuration complexity is reduced, but efficiency in handling variable traffic deteriorates

Engineering Contradiction:

Improveconfiguration complexityVSAvoidtraffic handling efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent transitions from static to dynamic resource allocations in SPS configurations. The gNB can dynamically adjust periodicity, resource allocation, and other parameters based on real-time traffic conditions, improving efficiency while maintaining manageable complexity through automated configuration.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms where the gNB monitors traffic patterns and adjusts SPS configurations accordingly. This feedback loop enables the system to adapt to variable traffic conditions automatically, improving efficiency without requiring complex manual configuration.

Inventive Principle:

Principle #23Feedback

4Ease of manufacture

If SPS occasions are configured with fixed timing, then scheduling is simplified, but power consumption increases due to unnecessary receptions

Engineering Contradiction:

Improvescheduling simplicityVSAvoidpower consumption

Core Design Contradiction:

Ease of manufactureVSUse of energy by stationary object

Solution Approach 1:

The patent optimizes the periodicity of SPS occasions to match actual traffic patterns rather than using fixed intervals. By configuring non-integer and variable periodicities, the system reduces the number of SPS occasions when traffic is absent, thereby reducing power consumption while maintaining scheduling simplicity through standardized periodicity options.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20230092206A1Semi-persistent configurations enhancements

Publication Date: 2023.03.23 SAMSUNG ELECTRONICS CO LTD

AI summary

A system and a method are disclosed for providing enhancements to Semi-Persistent Scheduling (SPS) to match traffic, while also providing power savings, resource utilization and HARQ enhancements related to traffic and SPS configurations. A SPS configuration may include one or more occasions in a Physical Downlink Shared Channel (PDSCH) of a wireless network for traffic for a wireless device. In response to the SPS configuration, the wireless device receives the traffic in the scheduled occasions. The SPS configuration may include one or more occasions in at least one time slot in a SPS period. At least one occasion may align with a target periodicity of the traffic. The SPS configuration may include different configuration states, and a Downlink Control Information (DCI) message may be used to indicate to a wireless device which SPS configuration state to use to receive the traffic.