MME Throttling Control Plane Data Rate for IoT
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Solution Overview
Problem
The transmission of data in the control plane for cellular IoT devices interferes with control signaling, leading to potential adverse effects on radio resources and inefficient system performance due to uncontrolled data rates.
Innovation Solution
Implementing throttling mechanisms at the MME node to control the data rate of both uplink and downlink data by using throttling factors and delays to manage congestion, ensuring that UEs and SCEF nodes adjust their data transmission according to network demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data is transmitted in the control plane for cellular IoT devices, then data transmission capability is improved, but interference with control signaling increases and system efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the data rate parameters (maximum bit rate, aggregated maximum bit rate, UE aggregated maximum bit rate, UE control plane aggregated maximum bit rate) for data transmitted in the control plane. The network node monitors control signaling load and modifies these rate parameters in response to congestion conditions, thereby balancing data transmission capability with control signaling efficiency.
2Speed
If data rate for UL data is increased in the control plane, then data transmission speed is improved, but interference with control signaling increases
Solution Approach 1:
The patent implements feedback mechanisms where the network node monitors the load on control signaling and provides feedback to UE(s) through rate parameter adjustments. When control signaling congestion is detected, the network node reduces the allowed data rates for UL data in control plane messages, creating a feedback loop that automatically balances data transmission speed with control signaling quality.
3Speed
If data rate for DL data is increased in the control plane, then data transmission speed is improved, but interference with control signaling increases
Solution Approach 1:
The patent applies feedback control for DL data by having the network node monitor control signaling load and dynamically adjust the data rate parameters for DL data transmitted in control plane messages. When congestion is detected, the network node reduces DL data rates, ensuring control signaling receives sufficient resources while maintaining optimal data transmission speed when resources are available.
4Object-affected harmful factors
If throttling mechanisms are implemented to control data rate, then interference with control signaling is reduced, but device complexity increases
Solution Approach 1:
The patent introduces the network node as an intermediary that centralizes the throttling control functionality. Instead of implementing complex throttling mechanisms in each UE or distributed across multiple nodes, the network node acts as a mediator that monitors control signaling load and uniformly applies rate parameter adjustments to all UE(s), thereby reducing overall system complexity while effectively managing interference with control signaling.
Data Source
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AI summary
In one aspect, an MME throttles (or otherwise controls) the amount or frequency of UL data that a UE transmits in the control plane, such as by communicating to the UE rate control information (e.g., a throttling factor or throttling delay). For instance, the MME may throttle NAS messages with user data (i.e., NAS Data PDUs) sent using control plane CIoT EPS optimization by adding a throttling factor and/or a throttling delay in a NAS message sent to the UE.