Call Processing Control Device Selective Call Acceptance
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Solution Overview
Problem
In mobile communication systems, simultaneous call connection requests from terminals receiving utilization promotion information can cause instantaneous congestion, leading to denial of both high-priority and low-priority calls when conventional congestion prevention methods restrict new calls indiscriminately.
Innovation Solution
A call processing control device determines the type of each call connection request and uses a random number threshold to selectively accept or reject requests, ensuring high-priority calls are not influenced while managing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If congestion prevention is implemented by restricting reception of setup requests, then instantaneous congestion is suppressed, but both high-priority and low-priority call connection requests are denied acceptance
Solution Approach 1:
The patent segments call connection requests into different categories based on call type (emergency calls, promotion calls, ordinary calls). By classifying requests into distinct groups, the system can apply different acceptance criteria to each segment, allowing high-priority emergency calls to be accepted while restricting low-priority promotion calls during congestion periods.
Solution Approach 2:
The patent applies different quality characteristics to different call types. Emergency calls are assigned high priority with guaranteed acceptance, while promotion calls are assigned low priority with restricted acceptance during congestion. This local differentiation of quality attributes enables selective congestion management that preserves critical services.
2Productivity
If utilization promotion information is transmitted to terminals, then network utilization rate improves, but simultaneous call connection requests cause instantaneous congestion
Solution Approach 1:
The patent implements periodic transmission of utilization promotion information to terminals rather than continuous transmission. By controlling the timing and frequency of promotion information delivery, the system can stimulate network utilization during low-traffic periods while avoiding triggering simultaneous call bursts that would cause congestion during already busy periods.
Solution Approach 2:
The patent employs feedback mechanisms where the base station monitors network congestion status and adjusts its response to call connection requests accordingly. When congestion is detected, the base station applies selective rejection based on call type, providing feedback control that maintains network utilization while preventing instantaneous congestion from promotion-induced call bursts.
3Reliability
If random number threshold method is used for promotion calls, then congestion is suppressed while high-priority calls are protected, but system complexity increases
Solution Approach 1:
The patent changes the parameter of call type identification by utilizing existing message fields (such as service type indicators or priority bits) that are already present in call setup requests. By reusing existing parameters rather than introducing new identification mechanisms, the system achieves call type differentiation with minimal increase in device complexity.
Data Source
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AI summary
A call processing control device (20), upon receiving a call connection request (32) from a mobile terminal (30), performs connection setup processing. The call processing control device (20) is equipped with: a call type determination unit (21) that determines the call type of the call connection request (32) and classifies, based on the determination result, the call connection request (32) as a request that is to be subjected to acceptance determination or as a request that is not; and an acceptance determination unit (22) that determines whether to or not to accept the call connection request (32) that has been classified as a request to be subjected to the acceptance determination. Thereby, congestion can be suppressed while suppressing influence on high-priority call connection requests.