Network Apparatus Back-Off Timer for DCN Failure Access Control
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Solution Overview
Problem
In a dedicated core network (DCN) configuration, failures can lead to ineffective access control, causing high-spec terminals like LTE category 4 M2M devices and smartphones to be unable to connect to a general core network, and repeatedly transmitting connection requests results in unnecessary power consumption.
Innovation Solution
A network apparatus and base station apparatus that select between a first and second network based on terminal type, and transmit a connection rejection request with a back-off timer value when the second network cannot accommodate the terminal, inhibiting subsequent connection requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If access control is performed on the DCN to accommodate specific terminal types, then the DCN can properly handle M2M terminals, but high-spec terminals like LTE category 4 smartphones cannot be connected to the general core network
Solution Approach 1:
The patent introduces a base station as an intermediary that detects DCN failure states and mediates between terminals and the core network. When DCN failure is detected, the base station prevents terminals from accessing the DCN by not forwarding their requests, thereby resolving the contradiction between maintaining DCN access control reliability and ensuring general terminal connectivity.
2Reliability
If terminals repeatedly transmit connection requests to access the DCN, then they attempt to establish connection, but this results in unnecessary power consumption
Solution Approach 1:
The patent implements a feedback mechanism where the base station detects DCN failure states and uses this information to control terminal access behavior. By detecting the failure state and preventing access attempts, the system provides feedback that stops terminals from repeatedly transmitting connection requests, thereby reducing power consumption while maintaining connection reliability.
3Reliability
If the DCN is configured with strict access control, then M2M terminals can be properly accommodated, but the system complexity increases
Solution Approach 1:
The patent segments the core network into a dedicated DCN for M2M terminals and a general core network for other terminals. The base station is segmented to handle DCN failure detection separately from normal access control. This segmentation allows M2M terminals to be properly accommodated in the DCN while simplifying the overall system by isolating the access control complexity to specific components.
Data Source
AI summary
A network apparatus includes: a network selection part which selects, between a first network and a second network that accommodates a terminal(s) that belongs to a predetermined terminal type, a network to which a terminal is to be connected, based on the terminal type; and a connection request processing part which transmits, when the second network is in a state where the second network cannot accommodate the terminal(s) that belongs to the predetermined terminal type, a connection rejection request in which a back-off timer value indicating a time period during which transmission of a next network connection request is inhibited, is set, to a network connection request from a terminal concerned.