Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1997-11-21
2002-06-11
Urban, Edward F. (Department: 2746)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S433000, C455S452200, C370S230000, C370S229000
Reexamination Certificate
active
06405045
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a dynamic overload control in a digital mobile communication system. Specifically, this invention is a dynamic overload control device and method for preventing a stoppage of a system and interruption of communication by dynamically controlling a resource use rate and processor overload in a base transceiver station and base station controller in a digital mobile communication system.
2. Discussion of Related Art
Usually, a mobile communication system using a code division multiple access (CDMA) system is based on a spread spectrum communication. This mobile communication system points to solve the capacity problem of demand for the mobile communication and provide an economical, efficient, and conveniently portable system.
The usual CDMA mobile communication system is largely divided into a mobile switching center (MSC), a base station controller (SC), a base transceiver station (BTS), and a mobile station (MS).
FIG. 1
shows a schematic configuration of such the CDMA mobile communication system.
The MSC is modularized to facilitate addition of functions and change in hardware or software, and employs an open structure to facilitate various network connections, and a modification and extension for improvement of performance of the expansion of capacity. The BSC, which is located between the BTS and MSC, can include base station control groups (BSCG) up to twelve. The BSC communicates with the BTS in the form of voice packet through a cable and performs transmission of voice and signals to the MSC, voice compression trans-coding, man-machine interface for operator matching, operation management, and configuration management. The BTS transmits/receives information of the MS to/from the BSC through a cable, and performs call process, management of radio resources, management of visual information transmitted between the MS and itself, sensing of errors, collecting and informing statistic information, packet routing, and power control. The MSC, as shown in
FIG. 1
, includes a home location register (HLR) for storing and managing data and parameter to provide a proper mobile communication service to a subscriber and for controlling subscriber management such as certification, encoding, and offer of routing information and additional service information.
Such a digital mobile communication system performs overload control by uniformly controlling allocation or rejection of allocation based upon only the performance of process and the communication resource use rate. The CDMA mobile communication system indiscriminately allocates or rejects a call after considering the occupancy of call resource and the stream of signals against a type of call, such as an out-going call, incoming call, or handoff request call. Such a usual digital mobile communication system cannot protect the handoff call, thus causing the interruption of communication.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a dynamic overload control device and method in a digital mobile communication system that substantially obviates one or more of the limitations and disadvantages of the related art.
An object of the present invention is to provide a dynamic overload control device and method for dynamically controlling the resource use rate and processor overload in a base transceiver station (BTS) and base station controller (BSC) in a digital mobile communication system.
Another objective of the present invention is to provide a dynamic overload control device and method for dynamically controlling the resource use rate and processor overload in a BTS and BSC to prevent the stop of a system in a digital mobile communication system.
Still another objective of the present invention is to provide a dynamic overload control device and method for dynamically controlling the resource use rate and processor overload in a BTS and BSC to prevent the interruption of communication in a digital mobile communication system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objects and other advantages of the invention will be realized and attained by the structure as illustrated in the written description and claims hereof, as well as the appended drawings.
To achieve these and other advantages, and in accordance with the purpose of the present invention as embodied and broadly described, a dynamic overload control device in a digital mobile communication system, includes: a data base for storing thresholds obtained at each point used for determining an overload; a drive unit installed in a base control processor (BCP) and a central control processor (CCP), for allocating an overload control process according to the thresholds of each point, used for determining the overload, stored in the data base, and starting the overload control process; an overload detect unit for periodically detecting activity ratios in the BCP and CCP and a call resource occupancy rate in a base transceiver station, and determining the overload after comparing an overload detect value with the thresholds obtained from the drive unit; and an overload process unit for processing the overload after selecting one between a call allocation operation and a call allocation rejection operation, if the overload is detected by the overload detect unit.
In another aspect, the present invention provides a dynamic overload control method in a digital mobile communication system, including the steps of: storing thresholds obtained at each point used for determining an overload in a data base after initialization, allocating an overload control process according to the thresholds, and starting the overload control process; detecting an overload detect value and determining the overload after comparing the overload detect value with the threshold allocated; and if the overload is determined, selecting one between a call allocation operation and a call allocation rejection operation, and processing the overload.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
REFERENCES:
patent: 4631363 (1986-12-01), Foster et al.
patent: 5548533 (1996-08-01), Gao et al.
patent: 5548804 (1996-08-01), Rosenlund
patent: 5623532 (1997-04-01), Houde et al.
patent: 5783969 (1998-07-01), Luz
patent: 5787357 (1998-07-01), Salin
patent: 5867787 (1999-02-01), Vudali et al.
Choi Kyong-Sub
Kim Won-Moo
Sim Joon-Sik
Hyundai Electronics Inds. Co. Ltd.
Lackenbach Siegel
Tran Congvan
Urban Edward F.
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