MTC Access Control via E-SPID Segmentation
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Solution Overview
Problem
The increasing deployment of Machine Type Communication (MTC) devices in LTE networks leads to network congestion issues due to their use of control signaling paths, which can impact other user equipment sharing the network, and existing solutions like delaying MTC devices do not significantly alleviate congestion.
Innovation Solution
Implementing a system that differentiates MTC user devices based on Subscriber Profile Identifiers (SPIDs) to manage quality of service (QoS) and mobility profiles, using enhanced eNodeBs to schedule communications according to designated QoS requirements and redirecting MTC devices to non-peak times through extended access barring and wait times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MTC devices use control signaling paths (SRB, RRC, NAS) to communicate, then MTC device communication is enabled, but network congestion increases and impacts other UEs sharing the network
Solution Approach 1:
The patent segments MTC devices into different categories based on their QoS requirements and communication patterns. By classifying devices into groups with different access priorities and scheduling parameters, the system can manage control signaling loads more effectively and reduce congestion impact on other UEs.
Solution Approach 2:
The patent modifies access control parameters such as access barring probabilities, wait times, and scheduling priorities based on device category and network conditions. These parameter changes enable dynamic adjustment of control signaling traffic to prevent congestion while maintaining essential MTC communications.
2Object-generated harmful factors
If RRC connection requests are delayed or rejected during congestion, then immediate traffic congestion is alleviated, but subsequent retry attempts create more RRC control signaling
Solution Approach 1:
The patent implements preliminary access control decisions by evaluating device categories and network conditions before allowing RRC connection requests. Devices are pre-assigned access parameters that determine their likelihood of being accepted or barred, preventing unnecessary retry attempts that would generate additional control signaling.
Solution Approach 2:
The system uses feedback mechanisms where the network monitors congestion levels and adjusts access control parameters dynamically. Based on real-time network conditions, the system provides feedback to MTC devices about access success or barring, enabling them to adjust their connection attempts appropriately without creating excessive retry traffic.
Data Source
AI summary
A method includes receiving, at a network control component, an enhanced subscriber profile identifier (E-SPID) associated with at least one machine type communications (MTC) user device from a home subscriber server (HSS). The method includes determining whether the E-SPID is in a first range of E-SPID values, wherein the first range of E-SPID values corresponds to a delay that exceeds a threshold, and interacting with a self-organizing network (SON) controller that interacts an operation administration maintenance (OAM) component to control and define a modified E-SPID based on network traffic and coverage in response to a determination that the E-SPID is in the first range of E-SPID values. The method further includes sending the modified E-SPID to at least one enhanced evolved node b (eNodeB) associated with the at least one MTC user device, wherein the at least one enhanced eNodeB is operable to perform access control and scheduling for the at least one MTC user device based on the E-SPID.