Uplink Resource Allocation for Relay Nodes in Wireless Networks
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Solution Overview
Problem
Conventional wireless networks do not adequately allocate uplink resources to relay nodes, particularly for GBR traffic, leading to increased latency and unsatisfactory performance due to regular uplink grants that do not account for the specific traffic types served by relay nodes.
Innovation Solution
Implementing an extended uplink resource allocation scheme where access nodes selectively issue extended uplink grants to relay nodes based on the type of traffic, providing additional resources and increasing the frequency of uplink grants to reduce latency, especially for GBR traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If relay nodes compete for uplink resources like directly connected end-user wireless devices using conventional uplink resource allocation schemes, then resource allocation simplicity is maintained, but latency increases and service quality deteriorates for GBR traffic
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on traffic type. Specifically, GBR traffic receives extended uplink grants with guaranteed resources and lower latency treatment, while non-GBR traffic uses conventional allocation. This localized differentiation in resource allocation quality resolves the contradiction by optimizing latency for time-sensitive GBR traffic without unnecessarily complicating the overall system.
Solution Approach 2:
The patent implements dynamic resource allocation by adjusting uplink grant parameters based on real-time traffic type detection. The access node dynamically switches between conventional and extended uplink grant schemes depending on whether the relay node is serving GBR or non-GBR traffic, thereby adapting resource allocation to current network conditions and resolving the latency-complexity tradeoff.
2Reliability
If conventional uplink resource allocation schemes are used for relay nodes, then system simplicity is maintained, but user experience and service quality deteriorate for GBR-related traffic
Solution Approach 1:
The patent enhances service quality locally for GBR traffic by implementing extended uplink grants specifically for relay nodes serving time-sensitive applications. This localized quality enhancement ensures reliable service for GBR traffic while maintaining conventional simple allocation for other traffic types, thus improving reliability without unnecessarily increasing overall system complexity.
Solution Approach 2:
The patent segments the uplink resource allocation into two distinct schemes: conventional uplink grants for non-GBR traffic and extended uplink grants for GBR traffic. This segmentation allows the system to provide high-reliability service for critical GBR traffic while keeping the overall allocation framework manageable through clear separation of concerns.
3Productivity
If extended uplink grants are issued to relay nodes for GBR traffic, then latency is reduced and service quality is improved, but resource allocation complexity increases
Solution Approach 1:
The patent uses dynamic traffic type detection to activate extended uplink grants only when GBR traffic is present. This dynamic approach improves data transmission efficiency for GBR traffic by providing prioritized resources, while avoiding the complexity overhead of extended grants for non-GBR traffic, thus optimizing productivity without permanent complexity increase.
Solution Approach 2:
The patent changes key allocation parameters (grant frequency, resource block allocation, timing) specifically for extended uplink grants to GBR relay nodes. These parameter changes enhance transmission efficiency for time-sensitive traffic, while the changes are applied selectively based on traffic type, preventing unnecessary complexity in the overall resource allocation system.
Data Source
AI summary
A system for allocating uplink resources to relay nodes in a wireless network includes an access node configured to deploy a first radio air interface. The system also includes a relay node configured to attach to the first radio air interface and to deploy a second radio air interface to which one or more end-user wireless devices are attached. The system further includes one or more other end-user wireless devices attached to the first radio air interface. The system further includes a processor configured to determine a type of traffic related to the one or more end-user wireless devices served by the relay node. The processor is further configured to selectively issue an extended uplink grant to the relay node based on the type of traffic.