Uplink Downlink Prescheduling Fixed Wireless Access
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Solution Overview
Problem
Conventional cellular and Internet networking technologies are unable to rapidly adjust to changes in uplink and downlink data rates while meeting strict latency requirements, particularly in supporting applications like extended reality, augmented reality, and online gaming, which demand flexible network reconfiguration to handle varying traffic loads.
Innovation Solution
Implementing uplink and downlink prescheduling in fixed wireless access networks, where base stations proactively allocate resources using blind grants for uplink data and dynamic scheduling for downlink data, prioritizing higher-priority subscriber units and adjusting bandwidth and latency based on subscription tiers to optimize network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional cellular and Internet networking is used, then network infrastructure is simple and cost-effective, but the system cannot rapidly adjust to changes in uplink and downlink data rates while meeting strict latency requirements
Solution Approach 1:
The patent implements prescheduling mechanisms where the base station proactively allocates uplink resources to subscriber units before data transmission is needed. The base station transmits prescheduling grants indicating future uplink resource allocations, allowing subscriber units to prepare data for immediate transmission when the scheduled time arrives, thereby reducing latency while maintaining network adaptability
Solution Approach 2:
The patent introduces dynamic scheduling mechanisms that allow the base station to adjust resource allocations in real-time based on changing network conditions and traffic demands. The system can switch between different scheduling modes (prescheduling, dynamic scheduling, grant-free access) depending on the specific application requirements and network state, enabling rapid adaptation to varying uplink and downlink data rates
2Loss of time
If prescheduling with blind grants is implemented for uplink data, then latency is reduced and bandwidth is increased for priority applications, but network complexity and resource management overhead increase
Solution Approach 1:
The patent applies different scheduling strategies to different subscriber units and traffic types based on their specific requirements. High-priority applications like augmented reality and online gaming receive prescheduling with blind grants to minimize latency, while other traffic types use conventional dynamic scheduling. This localized application of quality-of-service mechanisms reduces overall network complexity by applying complexity only where necessary
Solution Approach 2:
The patent modifies key network parameters such as grant allocation frequency, resource block size, and scheduling interval based on subscription tiers and application requirements. By dynamically adjusting these parameters, the system achieves low latency for priority applications without requiring complete redesign of the entire network management architecture
3Adaptability or versatility
If dynamic scheduling is implemented for downlink data, then network flexibility and adaptability improve, but processing overhead and system complexity increase
Solution Approach 1:
The patent implements downlink prescheduling where the base station pre-allocates resources for downlink data transmission based on predicted traffic patterns and subscriber requirements. This allows the network to maintain flexibility while reducing real-time processing overhead, as resource allocations are determined in advance rather than reacting to every instantaneous traffic change
Data Source
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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.