Wireless Resource Directional Restriction Signaling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing interference between uplink and downlink communications, particularly in heterogeneous networks where different base stations may not coordinate resource usage, leading to suboptimal resource utilization and increased interference.
Innovation Solution
A method where a first network node identifies interference and transmits an indication to a second network node to restrict communications in a specific direction on a resource, using a time window, to reduce interference and improve resource usage, allowing for more efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless communication systems allow simultaneous uplink and downlink communications on the same resource, then spectral efficiency is improved, but interference between opposite directions increases
Solution Approach 1:
The patent implements dynamic resource allocation where network nodes can flexibly switch between full-duplex and half-duplex modes based on real-time interference conditions. The indication message mechanism allows dynamic restriction of resource usage in opposite directions when interference is detected, enabling the system to adapt its duplexing mode dynamically rather than being fixed, thus resolving the contradiction between spectral efficiency and interference management.
Solution Approach 2:
The system changes the operational parameters of communication resources by introducing restriction indications that modify how resources are used in opposite directions. When interference is identified, the system alters the parameter state of the resource from unrestricted (allowing both directions) to restricted (blocking opposite direction communication), thereby controlling interference while maintaining efficient resource utilization in non-interfering scenarios.
2Device complexity
If base stations in heterogeneous networks independently allocate resources without coordination, then device complexity is reduced, but resource utilization becomes suboptimal
Solution Approach 1:
The patent enables base stations to autonomously manage interference by having each node independently monitor its own interference conditions and send restriction indications to neighboring nodes. This self-service approach eliminates the need for complex centralized coordination mechanisms while still achieving optimal resource utilization, as each base station independently makes decisions based on local interference conditions and communicates necessary restrictions to others.
Solution Approach 2:
The system implements a feedback mechanism where base stations monitor interference levels and send indication messages to neighboring nodes when interference is detected. This feedback loop allows distributed base stations to coordinate their resource allocation decisions without requiring complex centralized control, achieving both low complexity and high resource utilization through iterative local adjustments based on interference feedback.
3Object-affected harmful factors
If communication resources are restricted in one direction to reduce interference, then interference is reduced, but throughput in the restricted direction decreases
Solution Approach 1:
The patent applies partial restriction rather than complete resource denial. When interference is detected, the system restricts communication only in the opposite direction that causes interference, while allowing communication to continue in the non-interfering direction. This partial action approach reduces interference effectively while minimizing the impact on overall throughput, as only the necessary portion of resource usage is restricted rather than completely blocking the resource.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network node may identify interference associated with a first direction on a resource. The first network node may transmit, to a second network node in a time window associated with the resource, an indication that the resource is restricted with regard to communications, by the second network node, in a second direction on the resource, wherein the second direction is opposite the first direction. The first network node may communicate based at least in part on the indication. Numerous other aspects are described.