Fixed Wireless Access Prescheduling for Low-Latency Tiered Traffic

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Solution Overview

Problem

Conventional cellular and Internet networking fail to adjust rapidly to changes in uplink and downlink data rates while meeting strict latency requirements, particularly in fixed wireless access networks supporting extended-reality applications with varying traffic types.

Innovation Solution

Implementing uplink and downlink prescheduling in fixed wireless access networks, where a base station proactively allocates resources using blind grants for uplink data and dynamic scheduling for downlink data, adjusting to congestion and subscription tiers to optimize latency and throughput.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional cellular and Internet networking are used, then network infrastructure is simple and cost-effective, but the system cannot adjust rapidly to changes in uplink and downlink data rates while meeting strict latency requirements

Engineering Contradiction:
Improvedata rate adjustment speedVSAvoidlatency
Core Design Contradiction:
SpeedVSLoss of time

Solution Approach 1:

The base station performs preliminary actions by proactively allocating uplink resources to subscriber units before they need to transmit data. Blind grants are sent in advance, allowing subscriber units to immediately transmit uplink data without waiting for scheduling requests or buffer status reports, thereby reducing latency and enabling rapid adaptation to data rate changes.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If conventional scheduling methods are used, then device complexity is low, but the system cannot meet strict latency requirements for extended-reality applications

Engineering Contradiction:
Improvelatency requirement complianceVSAvoidscheduling system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The scheduling system is segmented into distinct components: blind grant transmission for uplink, dynamic scheduling for downlink, and separate handling of scheduling requests and buffer status reports. This segmentation allows each component to be optimized independently, improving latency compliance without unnecessarily increasing overall system complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The base station performs preliminary actions by proactively allocating uplink resources to subscriber units before they need to transmit data. Blind grants are sent in advance, allowing subscriber units to immediately transmit uplink data without waiting for scheduling requests or buffer status reports, thereby reducing latency and enabling rapid adaptation to data rate changes.

Inventive Principle:
Principle #10Preliminary action

3Loss of time

If blind grants are transmitted for uplink prescheduling, then uplink latency is reduced, but network congestion may increase

Engineering Contradiction:
Improveuplink latencyVSAvoidnetwork congestion
Core Design Contradiction:
Loss of timeVSObject-generated harmful factors

Solution Approach 1:

The system incorporates feedback mechanisms where the base station monitors network conditions and congestion levels. Based on this feedback, the base station dynamically adjusts the transmission of blind grants, reducing or suspending them when congestion is detected, thereby maintaining low latency when possible while preventing network overload.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The blind grant transmission is made dynamic rather than static. The base station adapts the frequency and allocation of blind grants based on real-time network conditions, subscriber unit priorities, and congestion levels, allowing the system to optimize between latency reduction and congestion prevention.

Inventive Principle:
Principle #15Dynamics

4Loss of time

If dynamic scheduling is implemented for downlink data, then downlink latency is reduced, but system complexity increases

Engineering Contradiction:
Improvedownlink latencyVSAvoidscheduling system complexity
Core Design Contradiction:
Loss of timeVSDevice complexity

Solution Approach 1:

The base station performs preliminary actions by proactively allocating uplink resources to subscriber units before they need to transmit data. Blind grants are sent in advance, allowing subscriber units to immediately transmit uplink data without waiting for scheduling requests or buffer status reports, thereby reducing latency and enabling rapid adaptation to data rate changes.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12526790B2Uplink and downlink prescheduling in fixed wireless access networks
Publication Date: 2026.01.13 T MOBILE US INC
  • US12526790B2 patent drawing
  • US12526790B2 patent drawing
  • US12526790B2 patent drawing

AI summary

A base station receives a request from a fixed wireless access network for uplink and downlink prescheduling. Blind grants for uplink data are sent to multiple subscriber units. The fixed wireless access network implements dynamic scheduling of downlink data. The uplink data is received from the multiple subscriber units based on the blind grants. The downlink data is sent to the multiple subscriber units using dynamic scheduling. Presence of congestion on a physical uplink shared channel (PUSCH) or a physical downlink shared channel (PDSCH) of the fixed wireless access network is determined. The uplink and downlink prescheduling for a first one or more subscriber units is terminated. The first one or more subscriber units is associated with a first subscription tier. The uplink and downlink prescheduling is continued for a second one or more subscriber units associated with a second subscription tier higher than the first subscription tier.