Pre-allocated Scheduler for Relay Wireless Devices
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Solution Overview
Problem
Wireless networks face challenges in providing high-quality service to increasing numbers of devices due to latency issues introduced by relay nodes, which add an additional hop in communication paths, affecting service requirements for real-time services like VoIP and VoLTE.
Innovation Solution
Implementing a scheduler that uses pre-allocated semi-persistent scheduling for relay wireless devices to aggregate and transmit data efficiently, reducing latency and meeting quality of service criteria by pre-allocating wireless resources and aggregating data for end-user devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay nodes are used to extend coverage and improve service quality, then coverage area and service quality are improved, but latency increases due to additional communication hops
Solution Approach 1:
The patent applies preliminary action through pre-allocated semi-persistent scheduling, where wireless resources are reserved in advance for relay wireless devices. This allows data to be transmitted immediately when available without waiting for dynamic scheduling decisions, thereby reducing the latency introduced by relay nodes while maintaining extended coverage areas.
2Productivity
If relay wireless devices are deployed to increase throughput in crowded areas, then available throughput is improved, but service latency worsens due to additional relaying steps
Solution Approach 1:
The patent implements preliminary action by pre-allocating wireless resources to relay wireless devices before data arrives. This semi-persistent scheduling approach ensures that when data needs to be relayed through crowded areas, the transmission resources are already reserved and ready, eliminating scheduling delays and reducing overall service latency while maintaining high throughput capacity.
3Adaptability or versatility
If dynamic scheduling is used for relay devices, then resource allocation flexibility is improved, but scheduling overhead and latency increase
Solution Approach 1:
The patent applies periodic action through semi-persistent scheduling, where wireless resources are allocated periodically to relay wireless devices based on their service requirements. This approach provides a balance between flexibility and efficiency: resources are reserved in advance for specific time intervals, reducing scheduling overhead and latency while still allowing periodic re-evaluation and adjustment of resource allocation to match changing traffic patterns.
Data Source
AI summary
Backhaul data may be communicated between an access node and a relay wireless device, wherein the relay wireless device serves as backhaul for a plurality of end-user wireless devices and a set of the plurality of the end-user wireless devices comprise a quality of service metric that meets a quality of service criteria. Wireless resources may be scheduled for the relay wireless device using pre-allocated scheduling such that wireless resources are pre-allocated for the relay wireless device. Data may be aggregated for the set of end-user wireless devices that is received at the access node between scheduled transmissions for the pre-allocated scheduling. And the aggregated data may be transmitted, according to the pre-allocated scheduling, from the access node to the relay wireless device at a next transmission for the pre-allocated scheduling.