Switching equipment capable of transferring priority information and priority connecting method

• US 6,331,980 B1
• Filed: 03/19/1998
• Issued: 12/18/2001
• Est. Priority Date: 10/08/1997
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Matsuo, Shinichiro
• Primary Examiner(s): NGO, RICKY QUOC
• Application Number:
  US09/044,436
• Time in Patent Office: 1,370 Days
• Field of Search: 370/466, 370/467, 370/522, 370/904, 370/395, 370/400, 370/465
• US Class Current: 370/395.61
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13166 Fault prevention
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13216 Code signals, frame structure
• CPC Class Codes: H04Q 2213/1325 Priority service
• CPC Class Codes: H04Q 2213/1329 Asynchronous transfer mode, ATM
• CPC Class Codes: H04Q 2213/13383 Hierarchy of switches, main and subexchange, e.g. satellite exchange
• CPC Class Codes: H04Q 2213/13399 Virtual channel/circuits
• CPC Class Codes: H04Q 3/0016 Arrangements providing connection between exchanges

Abstract

A traveling class mark information element in an N-ISDN message can be mapped to a QOS of a B-ISDN message to make a conventional network (e.g., N-ISDN) priority service executable in a B-ISDN with a spread of the B-ISDN.

Claims

1. A switching equipment capable of transferring priority information, for relaying over first and second networks having different protocols. comprising:

a receiving message control unit for extracting priority information of a call-out terminal from a first message format received from said first network;

a main control unit for converting the priority information obtained from said receiving message control unit into a second message format; and

a transmitting message control unit for transmitting to said second network the priority information converted into the second message format by said main control unit, wherein said first network is an N-ISDN,

the priority information is call-out terminal regulation class information based on Q.931-a,

said second network is a B-ISDN, and

the priority information after being converted is a QOS class prescribed in an ATM forum (UNI4.0).

2. A switching equipment capable of transferring priority information according to claim 1, wherein said first network is a B-ISDN,

the priority information is a QOS class prescribed in an A/TM forum (UNI4.0),

said second network is an N-ISDN, and

the priority information after being converted is call-out terminal regulation class information based on Q.9.931-a.

3. A switching equipment capable of transferring priority information according to claim 1, wherein said first or second network is a B-ISDN,

the priority information before or after being converted is a QOS class prescribed in an ATM forum (UNI4.0),

said second or first network is a No.7 common line system relay network, and

the priority information before or after being converted is a call-out user priority parameter.

4. A switching equipment capable of transferring priority information according to claim 1, wherein said first or second network is a B-ISDN,

the priority information before or after being converted is a QOS class prescribed in an ATM forum (UNI4.0),

said second or first network is an individual line system network, and

the priority information before or after being converted is a dial to which a special numeral is added.

5. A priority connecting method of relaying over N-ISDN and B-ISDN networks, comprising:

a step of judging whether or not there is priority information of a call-out terminal from a first message format received from said N-ISDN network, wherein the priority information is call-out terminal regulation class information based on Q.931-a;

a step of registering, when the priority information is detected, the priority information in a second message format for a call-out to said B-ISDN network; and

a step of editing the second message format containing the priority information converted to a QOS class prescribed in an ATM forum (UNI4.0 ) and sending this format to said B-ISDN network.

6. A priority connecting method according to claim 5, further comprising:

a step of making a request for a priority connection within a switching equipment.