Wireless Backhaul Coordination Using Time Division Multiplexing
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Solution Overview
Problem
In wireless communication systems operating in millimeter wave frequencies, inefficient resource allocation and uncoordinated signaling occur due to the dense deployment of access nodes without wireline backhaul links, leading to increased costs and reduced network efficiency.
Innovation Solution
Implementing a large-scale time division multiplexed schedule using radio access technology (RAT) for coordinated resource allocation among access nodes, enabling time synchronization and efficient scheduling through node functions such as Access Node Functions (ANFs) and User Equipment Functions (UEFs), which manage resource allocation and signaling protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If access nodes are densely deployed in millimeter wave frequency ranges, then coverage area is improved, but resource allocation efficiency deteriorates due to lack of wireline backhaul links
Solution Approach 1:
The patent replaces the mechanical/physical wireline backhaul link with a wireless backhaul link using radio access technology. This substitution enables dense deployment of access nodes without requiring extensive physical infrastructure, thereby maintaining coverage area improvement while avoiding the resource allocation inefficiencies that would otherwise result from lack of coordination in wireless-only backhaul networks.
2Ease of manufacture
If wireless backhaul links are used instead of wireline backhaul links, then deployment cost is reduced, but signaling coordination deteriorates
Solution Approach 1:
The patent introduces a coordinating entity that acts as an intermediary to manage and coordinate signaling between access nodes using wireless backhaul links. This intermediary ensures that resource allocation and signaling protocols are properly synchronized, thereby maintaining reliable coordination while enabling the cost benefits of wireless backhaul deployment.
Solution Approach 2:
The patent implements periodic scheduling and time-division multiplexing for resource allocation among access nodes. By establishing regular, periodic communication intervals and scheduled resource allocation cycles, the system ensures consistent signaling coordination across the wireless backhaul network, preventing the coordination deterioration that would otherwise occur with ad-hoc wireless communications.
3Productivity
If wireline backhaul links are deployed for all access nodes, then resource allocation coordination is improved, but deployment cost increases
Solution Approach 1:
The patent applies partial action by providing wireline backhaul links only to specific anchor access nodes rather than all access nodes. These anchor nodes with wireline connections serve as coordination points that manage resource allocation for neighboring access nodes using wireless backhaul. This partial deployment of wireline infrastructure achieves sufficient coordination while avoiding the excessive cost of universal wireline backhaul deployment.
Data Source
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AI summary
The use of a radio access technology (RAT) may enable wireless communication using one or more node functions at a wireless node, such as a base station or access node. Additionally, multiple wireless nodes may communicate in a network using a schedule that is aligned with a frame structure. For example, a wireless node may establish a link with different wireless nodes using a RAT that supports a synchronized frame structure, such as a millimeter wave (mmW) RAT. The wireless nodes may instantiate one or more node functions, such as an access node function (ANF) and a user equipment function (UEF). The wireless nodes may then communicate according to active and suspended modes using the node functions, where the communication is based on a schedule aligned with the frame structure.