IAB Central Coordination Signaling for Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless networks face inefficiencies in resource management due to devices with varying communication protocols and hardware limitations, leading to bandwidth constraints and suboptimal response times, especially in integrated access and backhaul networks where resource availability is not effectively coordinated.
Innovation Solution
Implementing a central coordination mechanism within integrated access and backhaul networks to allocate subframes and coordinate resources, using F1 interface signaling to indicate subframe types, including 'not available' subframes, to manage cross-interference and half-duplex constraints, thereby optimizing resource allocation and usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple devices share the same wireless resources, then resource utilization increases, but interference increases and response times worsen
Solution Approach 1:
The patent segments wireless resources by dividing time into distinct subframes with specific types (downlink, uplink, flexible, not available). Each subframe type is assigned specific functions to avoid interference. The central coordination entity segments the resource space temporally, allowing multiple devices to share resources without simultaneous conflicting transmissions.
Solution Approach 2:
The patent introduces a central coordination entity as an intermediary that manages resource allocation between multiple devices. This intermediary receives resource coordination requests, determines appropriate subframe types, and signals allocations to devices, preventing direct interference by mediating all resource sharing decisions through centralized control.
2Object-affected harmful factors
If central coordination is implemented to manage resources, then interference is reduced, but device complexity increases
Solution Approach 1:
The patent extracts the complex coordination function from individual devices and places it in a separate central coordination entity. This allows devices to remain relatively simple while the centralized entity handles the complex resource management. The coordination logic is taken out of the distributed device layer and concentrated in a dedicated management entity.
3Productivity
If subframe allocation is dynamically managed, then bandwidth efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent implements periodic resource coordination where the central coordination entity periodically signals subframe type allocations to devices. Instead of continuous dynamic adjustment, resource allocations are determined in periodic intervals, reducing signaling overhead while maintaining efficient bandwidth utilization through regular updates of the resource grid structure.
Data Source
AI summary
Embodiments of an integrated access and backhaul (IAB) donor, IAB node, and methods of communication are generally described herein. An IAB network may comprise a plurality of IAB nodes to operate as relays between the IAB donor and one or more User Equipment (UE). The IAB donor may, for each of the IAB nodes, allocate a plurality of subframes to the IAB node. Each allocated subframe may have a subframe type that is one of: a downlink subframe, an uplink subframe, a flexible subframe or a not available subframe. The IAB donor may transmit, from a central unit (CU) of the IAB donor to a distributed unit (DU) an IAB node over an F1 interface, a resource coordination request message that indicates the subframe types of the plurality of subframes.