Looped Wireless Network Switching for RRU Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication networks with a distributed base station architecture, comprising Remote Radio Units (RRUs) and Building Baseband Units (BBUs), are fragile and prone to connection failures, leading to disconnection of adjacent RRUs when a link failure occurs, compromising network stability and robustness.
Innovation Solution
A method and system for switching wireless devices in a looped network, where the BBU and RRU detect line error rates and send valid or invalid control characters to manage port states, allowing for timely link switching and maintaining network stability by reconfiguring port roles in case of errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a distributed base station architecture with RRUs and BBUs is used to improve network coverage, then network coverage is improved, but network robustness deteriorates because a single link failure causes cascading disconnections
Solution Approach 1:
The patent implements dynamic port role switching where RRUs can transition between master and slave ports based on real-time link status. When a link failure is detected, the RRU dynamically reconfigures its port roles to maintain connectivity through alternative paths, transforming the static distributed architecture into a dynamically adaptive system that preserves robustness while maintaining coverage expansion capabilities
Solution Approach 2:
The system changes the operational parameters of network elements by switching port roles (master/slave) and adjusting connection topologies. This parameter transformation allows the network to adapt from a fragile star topology to a more resilient configuration, resolving the contradiction between coverage expansion and robustness maintenance
2Device complexity
If multiple RRUs are connected to a single BBU in a distributed manner to reduce complexity, then device complexity is reduced, but reliability deteriorates because link failures cause adjacent RRUs to disconnect
Solution Approach 1:
The patent segments the control functions by designating specific RRUs as master ports that manage link failures independently. This segmentation allows individual RRUs to handle their own link failures autonomously without requiring BBU intervention, maintaining the simple distributed structure while improving reliability through localized failure management
Solution Approach 2:
The system implements self-service mechanisms where RRUs automatically detect link failures and perform port role switching without external control. This self-service capability maintains the low-complexity distributed architecture while ensuring reliable operation through autonomous failure response
3Ease of operation
If a simple distributed connection mode is used to ease operation, then ease of operation is improved, but reliability deteriorates as network failures cascade to adjacent RRUs
Solution Approach 1:
The patent enables the network to serve itself by implementing automatic failure detection and port role switching mechanisms. The RRUs autonomously monitor link status and reconfigure connections without manual intervention, maintaining operational simplicity while achieving self-healing capabilities that prevent failure cascades and ensure network stability
Data Source
AI summary
The disclosure discloses a method and system for switching wireless devices in a looped network. The wireless devices include a core wireless device and remote wireless devices, and the core wireless device and two or more remote wireless devices, connected through two ports of the core wireless device, constitute a looped network; the method including: when the core wireless device detects that a line error rate at each of the two ports is within a determined threshold range, the core wireless device sends a valid control character, otherwise, the core wireless device sends an invalid control character; wherein the valid control character sent at one of the two ports of the core wireless device is different from that sent at another of the two ports of the core wireless device; when the remote wireless device detects that a line error rate at a receiving end of a master port of the remote wireless device is within the determined threshold range, the remote wireless device forwards the valid control character received at a slave port to the master port, otherwise, the remote wireless device sends the invalid control character to the master port; and the remote wireless device sends the invalid control character to its slave port continuously. With the present disclosure, the stability of the networking mode through the RRUs is promoted.