Configured Grant Uplink Allocation for Low-Latency XR Traffic

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Solution Overview

Problem

Existing XR devices face challenges with strict power consumption and mobility limitations due to the use of cables for connecting HMDs with computers or servers, and current wireless networks cannot support the high data rates and low latency required for immersive XR experiences.

Innovation Solution

Implementing methods for efficient resource allocation in wireless communication networks by using configured grant (CG) physical uplink shared channel (PUSCH) transmission occasions, including dynamic indication of unused CG PUSCH transmission occasions and HARQ process management to optimize resource utilization for XR traffic.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If cables are used to connect HMDs with computers or servers, then power consumption and weight constraints are met, but user mobility is limited

Engineering Contradiction:

Improvepower consumptionVSAvoiduser mobility

Core Design Contradiction:

Use of energy by moving objectVSEase of operation

Solution Approach 1:

The patent replaces the mechanical cable connection system with a wireless communication system. HMDs communicate with base stations via wireless signals, eliminating the need for physical cables while maintaining power efficiency and enabling user mobility. The base station receives uplink signals from HMDs and transmits downlink signals back, creating a wireless bridge between the HMD and the computing system.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If Wi-Fi or Bluetooth is used for wireless connection, then user mobility is improved, but data rates are insufficient for high-quality XR

Engineering Contradiction:

Improveuser mobilityVSAvoiddata rate

Core Design Contradiction:

Ease of operationVSSpeed

Solution Approach 1:

The patent changes the fundamental parameters of the wireless communication system by operating in sub-6 GHz and millimeter wave frequency bands with wide bandwidths. This enables data rates of several Gbps, significantly higher than Wi-Fi or Bluetooth, while maintaining wireless mobility. The system uses advanced modulation and multiple antenna techniques to achieve these high data rates.

Inventive Principle:

Principle #35Parameter changes

3Speed

If 5G-NR wireless networks are used, then data rates of several Gbps are achieved, but latency and resource allocation efficiency prevent support for ultimate XR requirements

Engineering Contradiction:

Improvedata rateVSAvoidlatency

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The patent implements configured grants that are pre-configured and pre-allocated for uplink transmissions. This preliminary action eliminates the need for dynamic scheduling requests and acknowledgments, reducing latency. The base station pre-allocates time-frequency resources for HMDs to use without needing to request them in real-time, enabling faster response times for XR traffic.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent enables HMDs to autonomously select and use pre-configured uplink resources without requiring base station intervention for each transmission. This self-service mechanism reduces signaling overhead and latency, allowing HMDs to immediately transmit data when needed while the base station simply monitors and receives the transmissions.

Inventive Principle:

Principle #25Self-service

4Productivity

If multiple CG PUSCH transmission occasions are allocated, then resource utilization can be improved, but complexity increases without efficient management

Engineering Contradiction:

Improveresource utilizationVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements feedback mechanisms where HMDs report the status of their configured grant transmissions to the base station. This feedback enables the base station to track which transmission occasions have been used and which are unused, allowing for efficient resource reallocation and optimization without excessive complexity. The feedback loop maintains system simplicity while maximizing resource utilization.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20260046877A1System and design with efficient resource allocation for wireless communication networks

Publication Date: 2026.02.12 HUAWEI TECH CO LTD

AI summary

According to embodiments, a method performed by a wireless device includes receiving radio resource control messages comprising configuration parameters indicating a bitfield for uplink control information indication of an unused configured grant (CG) physical uplink shared channel (PUSCH) transmission occasion for a CG with one or more CG PUSCH transmission occasions, wherein: the bitwidth of the bitfield is equal to the quantity of the one or more CG PUSCH transmission occasions; and each bit of the bitfield is associated with a respective CG PUSCH transmission occasion of the one or more CG PUSCH transmission occasions. The method also includes determining a CG PUSCH transmission occasion associated with a bit from the bitfield and determining a status of the CG PUSCH transmission occasion as unused for the bit set to a first value and as a used for the bit being set to a second value.