UE Access Barring via Immediate SIB Update
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Solution Overview
Problem
The existing methods for controlling network overload in Machine-Type Communication (MTC) devices within a 3GPP system are inefficient, as they rely on traditional access barring mechanisms that take too long to update, leading to unstable radio networks and initial attachment failures due to simultaneous access attempts.
Innovation Solution
A method that allows for immediate receipt of updated access barring information in a System Information Block (SIB) via a paging message, independent of modification periods, enabling MTC devices to delay or distribute their access attempts based on new Extended Access Barring (EAB) information, thereby reducing network load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the normal access barring mechanism is used to control network load, then the network overload can be managed, but the response time is too long causing inefficient access control
Solution Approach 1:
The eNB performs preliminary action by immediately transmitting the modified SIB through the paging message as soon as access barring information needs to be updated, rather than waiting for the next modification period. This preliminary transmission of updated SIB information enables UEs to acquire access control information faster, resolving the contradiction between network load control reliability and time efficiency.
2Reliability
If multiple MTC devices attempt simultaneous access to the network, then the network load increases abruptly causing instability, but delaying access reduces network availability
Solution Approach 1:
The system introduces dynamic access control by allowing the eNB to modify access barring information in real-time based on current network load conditions. The modified SIB is transmitted dynamically through paging messages, enabling the system to adapt access control parameters dynamically rather than using static modification periods, thus balancing network stability with access speed.
3Device complexity
If the eNB waits for the next modification period to transmit updated SIB, then the system maintains structured information updates, but the access control response is delayed
Solution Approach 1:
The system segments the SIB transmission into two paths: the regular periodic transmission and the immediate on-demand transmission via paging message. This segmentation allows the eNB to maintain the structured periodic update mechanism while adding an emergency path for immediate information delivery, thus resolving the contradiction between maintaining system structure and reducing response time.
Data Source
AI summary
A method for controlling delay tolerant access of a Machine-Type Communication (MTC) device based on a backoff mechanism is provided. The method includes receiving, at a terminal, a paging message including an access barring information update indicator from a base station, and receiving a System Information Block (SIB) including updated access barring information, the SIB being received regardless of modification periods. The terminal receives the SIB including the updated access barring information immediately without waiting for the arrival of next modification period, resulting in improvement of access barring efficiency.