CIoT Uplink Admission Control for Small Data Traffic Overload
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Solution Overview
Problem
The increasing number of Cellular Internet-of-Things (CIoT) devices transmitting small amounts of user data can overwhelm wireless networks, leading to potential overloads in radio access and core networks, as existing mechanisms do not prevent such overloads effectively.
Innovation Solution
Implementing an admission control function (ACF) in both wireless communication devices (WCDs) and network elements like the core serving node (CSN) to regulate user data traffic, ensuring transmissions remain infrequent and within predefined thresholds, with options to deny or charge for excessive data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CIoT devices transmit small amounts of user data using control plane messages, then the network can handle device connectivity and control functions, but the total amount of user data and signaling from numerous devices can overwhelm the radio access network and core network
Solution Approach 1:
The patent implements admission control mechanisms that perform preliminary assessment of data transmission requests before they are fully processed. The network evaluates whether to admit control plane user data based on current network conditions, device subscription profiles, and traffic patterns, preventing overload before it occurs
Solution Approach 2:
The system dynamically changes admission control parameters such as thresholds for control plane user data transmission, maximum data sizes, and rate limits based on network conditions. These parameters are adjusted to balance adaptability for CIoT devices with prevention of network overload
2Reliability
If admission control mechanisms are implemented to prevent network overload, then network stability is improved, but device complexity increases due to additional control functions
Solution Approach 1:
The admission control function is implemented within the CIoT device itself, enabling self-service admission control. The device autonomously evaluates its own data transmission requests against stored admission control parameters and makes decisions without requiring complex external control mechanisms, thereby improving network stability while minimizing additional device complexity
Solution Approach 2:
The admission control function serves multiple purposes: it prevents network overload, enforces subscription plans, manages radio resources, and supports flexible charging schemes. This multi-functionality reduces the need for separate specialized mechanisms, balancing reliability improvement with controlled device complexity
Data Source
AI summary
Various embodiments described herein aim to ensure that user data transmissions (e.g., small data transmissions that are sent using control plane messages) do not become excessive and stay infrequent, thereby reducing the likelihood of a network overload situation. In one embodiment, an admission control function (ACF) for regulating the transmission of uplink user data is implemented in a wireless communication device (WCD) (e.g., a CIoT device). Such a WCD device may receive from a core serving node (CSN) admittance information (AI) (e.g., parameters, such as thresholds, used by the ACF to regulate the uplink traffic) that is used in performing the admittance control.