Mitigating 5G and Microwave Backhaul Interference via Dynamic Channel Segmentation
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Solution Overview
Problem
The coexistence of 5G cell sites and microwave backhauls using the same 28 GHz band often results in interference issues, which affect the performance and efficiency of wireless communication networks.
Innovation Solution
Implementing techniques for detecting and mitigating interference by determining the geometry of devices in the environment, selecting appropriate wireless resources, and adjusting channels or radio access technologies to reduce interference, such as handovers from 5G to 4G or changing channels to introduce guard bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If microwave backhaul and 5G cell sites use the same 28 GHz band, then wireless backhaul can be deployed as a cost-effective alternative to wired backhaul, but interference issues arise that affect network performance
Solution Approach 1:
The system segments the 28 GHz frequency band into different channels for microwave backhaul and 5G communications. By dividing the available spectrum into distinct channels and assigning them to different systems, the patent eliminates interference while maintaining cost-effective wireless deployment. This frequency segmentation allows both microwave backhaul and 5G cell sites to coexist in the same band without harmful interactions.
Solution Approach 2:
The patent implements dynamic channel selection and adjustment mechanisms that adapt to changing network conditions. The system can dynamically switch channels, adjust transmission parameters, and reconfigure resource allocation based on real-time interference measurements and network traffic requirements. This dynamic approach optimizes performance while preventing interference between coexisting systems.
2Device complexity
If wireless resources are allocated without interference mitigation, then network deployment is simplified, but network throughput and quality of service deteriorate due to interference
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors channel quality, interference levels, and transmission performance. Based on this feedback, the system automatically adjusts channel assignments, power levels, and resource allocation parameters. This closed-loop control ensures optimal network throughput while maintaining manageable complexity through automated adaptation rather than complex manual configuration.
Solution Approach 2:
The system dynamically changes key transmission parameters including frequency channel selection, transmission power levels, and modulation schemes based on detected interference conditions. By adapting these parameters in real-time, the patent maintains high network throughput even in the presence of potential interference sources, while the automation keeps implementation complexity reasonable.
3Object-affected harmful factors
If guard bands are introduced to mitigate interference, then interference between systems is reduced, but available wireless bandwidth decreases
Solution Approach 1:
Instead of applying excessive guard bands across the entire spectrum, the patent uses partial action by selectively applying frequency separation only where interference is detected or anticipated. The system allocates channels and frequency resources dynamically, introducing guard bands or frequency offsets only in specific frequency ranges and time periods where needed, thereby minimizing the impact on total available bandwidth while still providing adequate interference protection.
Data Source
AI summary
Techniques for detecting and/or mitigating interference in a wireless network are discussed herein. An environment may include a base station in communication with one or more user equipment (UE) and one or more microwave backhaul transceivers. In some examples, the base station may and transceivers may communicate using frequencies in the same band (e.g., a millimeter frequency band). A geometry of devices in an environment can be determined. Further, interference can be detected based on a flexible portion of a transmission or a source identifier that can be included in a transmission. In some examples, the microwave backhaul transceivers may communicate via a same or similar millimeter frequency resources. Wireless resource(s) can be selected or otherwise determined for one or more components of the network to mitigate interference in the network.