Method of assigning connection identifier in asynchronous transfer mode switching system
First Claim
1. A method of assigning a connection identifier for an asynchronous transfer mode switching (ATM) system, said method comprising the steps of:
- (a) analyzing a parameter transmitted in a received connection identifier allocation request, analyzing the number of connections in a subscriber interface module (SIM), and confirming a signalling mode between a subscriber and a network of the analyzed parameter is normal and a connection is available;
(b) calculating an index value for accessing a virtual path identifier (VPI) management table which stores a VPI usage state if the signalling mode is a coupled signalling mode in which only the same VPI as a VPI for signalling is used as a VPI for user data transmission, VPI or both VPI and virtual connection identifier (VCI) are designated in a connection identifier allocation request, and the VPI for signalling and the VPI for user data transmission are identical, to thereby check the usage stage of a detected VPI;
(c) designating the VPI for user data transmission as the VPI for signalling if the signalling mode is a decoupled signalling mode in which the VPI for signalling and other VPIs are available for the VPI for user data transmission, and the VPI or both VPI and VCI are not designated, and calculating the index value for accessing the VPI management table which stores the VPI usage state if there is no error in the designated VPI, to thereby check the usage state of the detected VPI;
(d) notifying a connection identifier allocation failure if the VPI is used for virtual path connection, notifying that the virtual path is already established if the VPI is used for a virtual channel, or analyzing the signalling mode if the VPI is not in use;
(e) indicating that the selected VPI is in use if the signalling mode is the decoupling mode and the number of VPI used does not surpass the number of VPI assigned to a connection identifier allocation number management table; and
(f) indicating that the selected VPI is in use if the signalling mode is the coupling mode and a new VPI can be used.
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Accused Products
Abstract
A method of assigning a connection identifier for an asynchronous transfer mode switching system, includes the steps of: (a) analyzing a parameter transmitted in a VPI allocation request if it is received, analyzing the number of connections and the number of VPI used in SIM, and confirming whether a VPI desired to be used in VPI allocation request if the input parameter is normal and connection is available; (b) changing the usage state of VPI assigned to a VPI management table if the VPI is designated and this is in no use, increasing the number of VPI and the number of VPI assigned in the connection identifier management table, indicating a VPI assigned, or selecting a VPI in no use in SIM if the VPI is not designated with reference to the VPI management table, and changing the usage state of the VPI assigned in the VPI management table.
49 Citations
31 Claims
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1. A method of assigning a connection identifier for an asynchronous transfer mode switching (ATM) system, said method comprising the steps of:
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(a) analyzing a parameter transmitted in a received connection identifier allocation request, analyzing the number of connections in a subscriber interface module (SIM), and confirming a signalling mode between a subscriber and a network of the analyzed parameter is normal and a connection is available; (b) calculating an index value for accessing a virtual path identifier (VPI) management table which stores a VPI usage state if the signalling mode is a coupled signalling mode in which only the same VPI as a VPI for signalling is used as a VPI for user data transmission, VPI or both VPI and virtual connection identifier (VCI) are designated in a connection identifier allocation request, and the VPI for signalling and the VPI for user data transmission are identical, to thereby check the usage stage of a detected VPI; (c) designating the VPI for user data transmission as the VPI for signalling if the signalling mode is a decoupled signalling mode in which the VPI for signalling and other VPIs are available for the VPI for user data transmission, and the VPI or both VPI and VCI are not designated, and calculating the index value for accessing the VPI management table which stores the VPI usage state if there is no error in the designated VPI, to thereby check the usage state of the detected VPI; (d) notifying a connection identifier allocation failure if the VPI is used for virtual path connection, notifying that the virtual path is already established if the VPI is used for a virtual channel, or analyzing the signalling mode if the VPI is not in use; (e) indicating that the selected VPI is in use if the signalling mode is the decoupling mode and the number of VPI used does not surpass the number of VPI assigned to a connection identifier allocation number management table; and (f) indicating that the selected VPI is in use if the signalling mode is the coupling mode and a new VPI can be used. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 31)
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21. A method of assigning a connection identifier for an asynchronous transfer mode switching system, said method comprising the steps of:
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(a) analyzing a parameter transmitted in a received VPI allocation request, analyzing the number of connections and the number of VPI used in a subscriber interface module (SIM), and confirming whether a VPI desired to be used in VPI allocation request if the input parameter is normal and connection is available; (b) changing a usage state of VPI assigned to a VPI management table if the VPI is designated and is not in use, increasing the number of VPI and the number of VPI assigned in a connection identifier management table, indicating an assigned VPI, or selecting a VPI not in use in SIM if the VPI is not designated with reference to the VPI management table, and changing the usage state of the VPI assigned in the VPI management table. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification