Millimeter Wave Link Recovery via Prioritized Switching Rules
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Solution Overview
Problem
Current millimeter wave wideband communication systems face challenges in maintaining reliable links due to obstacles and non-line-of-sight issues, especially with directional antennas or antenna arrays, which can lead to broken connections and increased network signaling overhead.
Innovation Solution
Implementing a method where network nodes determine broken links and recover or establish new links using prioritized switching rules, including switching to alternative beams or cells with better signal strength and backhaul connectivity, to maintain communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If directional antennas or antenna arrays are used in millimeter wave wideband communication systems, then communication capacity and bandwidth are improved, but link reliability deteriorates due to obstacles and non-line-of-sight issues
Solution Approach 1:
The system pre-establishes multiple candidate links and switching rules before the current link breaks. When a link break is detected, the base station or mobile station can immediately switch to a pre-identified alternative link without extensive signaling overhead, thus maintaining reliability while using directional antennas for high capacity
Solution Approach 2:
The system dynamically changes link parameters by switching between different candidate links based on current communication conditions. Multiple candidate links are maintained with different characteristics, and the system selects the appropriate link by changing operational parameters rather than maintaining a single fixed link
2Stability of the object's composition
If link recovery attempts are made before establishing new links, then link stability is improved, but communication delay increases due to recovery procedures
Solution Approach 1:
Candidate links are pre-identified and prepared in advance through measurement and evaluation procedures. When the current link breaks, the system can immediately attempt to switch to a pre-prepared candidate link rather than performing extensive recovery procedures, thus reducing delay while maintaining stability
Solution Approach 2:
The system implements dynamic link switching capability where the mobile station and base station can rapidly transition between different candidate links. This dynamic approach allows the system to adapt quickly to link failures without being constrained by static recovery procedures, reducing communication delay
3Reliability
If multiple candidate links are maintained for switching, then link reliability is improved, but network signaling overhead increases
Solution Approach 1:
Candidate links are pre-established and measured in advance, with their characteristics stored in both the base station and mobile station. This preliminary action reduces the need for extensive real-time signaling when link switching is required, as the essential information about candidate links is already available locally
Solution Approach 2:
The mobile station performs autonomous measurements and evaluations of candidate links, and can independently determine switching decisions based on pre-configured switching rules. This self-service capability reduces the signaling overhead by eliminating the need for extensive network-controlled measurements and decisions for every potential link switch
Data Source
AI summary
A network node in a wireless network performs a method for enhancing reliability in wireless communication. The method includes determining, at a first network node, that a current link with a second network node is broken. The method also includes attempting, at the first network node, to recover the current link. The method further includes, upon a determination that the current link is not recoverable, establishing, at the first network node, a new link with the second network node according to one of a plurality of switching rules, the switching rules ordered according to a priority among the switching rules.