5G Radio Unit Keepalive Signaling to Prevent Message Flooding
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Solution Overview
Problem
5G wireless networks experience inefficiencies in the registration process, leading to undesirable message flooding due to unnecessary traffic broadcasts across multiple cells when devices have not recently registered with the network.
Innovation Solution
Implementing dummy messages from radio units to maintain registration in router tables, prolonging the time before timeouts occur, thereby reducing the need for redundant message broadcasts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the router broadcasts messages to multiple radio units when the routing table lacks a live entry, then the device can be reached in unknown cells, but message flooding occurs across multiple cells
Solution Approach 1:
The radio unit sends a dummy message before the router's routing table entry times out, proactively maintaining the live entry to prevent subsequent message flooding. This preliminary action ensures the router has current routing information before needing to broadcast, thereby preventing the harmful flooding effect while maintaining device reachability
2Object-generated harmful factors
If the router maintains live entries in the routing table for longer periods, then message flooding is reduced, but outdated information may be retained
Solution Approach 1:
The radio unit provides feedback by sending dummy messages to the router, confirming its continued operation and presence. This feedback mechanism allows the router to maintain accurate routing information for active radio units without premature timeout, reducing message flooding while preventing retention of outdated information about inactive units
3Loss of information
If dummy messages are sent frequently from radio units, then routing table entries are maintained accurately, but network traffic increases
Solution Approach 1:
The radio unit sends dummy messages periodically at intervals before the router's routing table entry timeout period expires. This periodic action maintains routing information accuracy without excessive traffic, as the dummy messages are sent only when needed to prevent timeout and subsequent flooding, rather than continuously
Data Source
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AI summary
Automated processes, computing systems, devices and other aspects of a wireless data network are described. According to various embodiments, message flooding in the wireless network is reduced through the use of "dummy" messages from the radio unit (RU) to the distributed unit (DU) and/or layer two (L2) switch. The dummy messages prevent timeout of the RU's data in the L2 switch's routing tables, thereby prolonging the period of time that the L2 switch is able to more efficiently direct subsequent traffic toward that particular device.