Substitution call control system in ATM communication network

• US 6,859,457 B1
• Filed: 06/03/1999
• Issued: 02/22/2005
• Est. Priority Date: 06/05/1998
• Status: Expired due to Term

• Current Assignee: Juniper Networks Incorporated
• Original Assignee: NEC Corporation
• Inventors: Tanaka, Masashi
• Primary Examiner(s): NGUYEN, HANH N
• Application Number:
  US09/324,655
• Time in Patent Office: 2,091 Days
• Field of Search: 370/395.1, 370/396, 370/397, 370/399, 370/395.2, 370/395.21, 370/395.3, 370/395.5, 370/395.54, 370/400, 370/419, 370/420, 370/401, 370/469, 370535-536, 370/537, 379/92.04, 379/93.04, 379/93.05
• US Class Current: 370/395.2
• CPC Class Codes: H04L 2012/5603 Access techniques
• CPC Class Codes: H04L 2012/5614 User Network Interface
• CPC Class Codes: H04L 2012/563 Signalling, e.g. protocols, reference model
• CPC Class Codes: H04L 2012/5658 using the AAL5
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections

Abstract

A substitution call control system includes an ATM (Asynchronous Transfer Mode) subscriber network of an ATM communication network. The ATM subscriber network includes a plurality of network terminators respectively connected with a plurality of subscriber terminals, and an ATM subscriber line concentrator, which accommodates VCs (Virtual Connection) to the plurality of network terminators, and is connected with a ATM switching apparatus of the ATM network through a UNI (User-Network Interface). The ATM subscriber line concentrator includes a substitution call control function to substitute for the plurality of network terminators and the subscriber terminals for a call control.

Claims

1. A substitution call control system including an ATM (Asynchronous Transfer Mode) subscriber network of an ATM communication network, said ATM subscriber network comprising:

a plurality of network terminators respectively connected with a plurality of subscriber terminals; and

an ATM subscriber line concentrator which accommodates VCs (Virtual Connection) to said plurality of network terminators, and is connected with a ATM switching apparatus of said ATM network through a UNI (User-Network Interface), and

wherein said ATM subscriber line-concentrator includes a substitution call control function to substitute for said plurality of network terminators and said subscriber terminals for a call control and

wherein said plurality of network terminators and said plurality of subscriber terminals do not have call control functions.

2. A substitution call control system according to claim 1, wherein when one of said plurality of subscriber terminals issues a call processing request to said ATM subscriber line concentrator through a corresponding one of said plurality of network terminators, a line number connected to said one subscriber terminal and an ATM address of said one network terminator or said one subscriber terminal are held.

3. A substitution call control system according to claim 1, wherein when one of said plurality of subscriber terminals issues a call processing request to said ATM subscriber line concentrator through a corresponding one of said plurality of network terminators, a call number is held.

4. A substitution call control system according to claim 1, wherein when a SVC (Switched Virtual Channel) connection is established in response to a call processing request issued from one of said plurality of subscriber terminals to said ATM subscriber line concentrator through a corresponding one of said plurality of network terminators, a VPI (Virtual Path Identifier) value and a VCI (Virtual Channel Identifier) value of said SVC connection are held.

5. A substitution call control system according to claim 1, wherein said ATM subscriber line concentrator and each of said plurality of subscriber terminals are connected by a PVC (Permanent Virtual Circuit) connection to allow a substitution call control message to be transmitted and received.

6. A substitution call control system according to claim 1, wherein said ATM subscriber line concentrator and each of said plurality of network terminators are connected by a PVC (Permanent Virtual Circuit) connection to allow a substitution call control message to be transmitted and received.

7. A substitution call control system according to claim 5, wherein a VPI/VCI value (a value of VP identifier/VC identifier) of said PVC connection is 0/5.

8. A substitution call control system according to claim 6, wherein a VPI/VCI value (a value of VP identifier/VC identifier) of said PVC connection is 0/5.

9. A substitution call control system according to claim 5, wherein said substitution call control message is transmitted and received in a same protocol as that for a subscriber data.

10. A substitution call control system according to claim 6, wherein said substitution call control message is transmitted and received in a same protocol as that for a subscriber data.

11. A substitution call control system according to claim 5, wherein said substitution call control message is transmitted and received by a Classical IP and ARP over ATM system defined in IETF (Internet Engineering Task Force) RFC (Request For Comment) 1577.

12. A substitution call control system according to claim 6, wherein said substitution call control message is transmitted and received by a Classical IP and ARP over ATM system defined in IETF (Internet Engineering Task Force) RFC (Request For Comment) 1577.

13. A substitution call control system according to claim 5, wherein said substitution call control message is transmitted and received by an xDSL over ATM system through a PVC connection, wherein said xDSL is a general term of various typea of DSL (Digital Subscriber Line, and includes an Asymmetric DSL, a high-bit-rate DSL, a Rate-Adaptive DSL, a Symmetrical DSL and a Very-high-bit-rate DSL).

14. A substitution call control system according to claim 6, wherein said substitution call control message is transmitted and received by an xDSL over ATM system through a PVC connection, wherein said xDSL is a general term of various type of DSL (Digital Subscriber Line, and includes an Asymmetric DSL, a high-bit-rate DSL, a Rate-Adaptive DSL, a Symmetrical DSL and a Very-high-bit-rate DSL).

15. A substitution call control system according to claim 1, wherein each of said plurality of subscriber terminals and a corresponding one of said plurality of network terminators are connected in IEEE 802.3 ether network.

16. A substitution call control system according to claim 1, wherein each of said plurality of subscriber terminals and a corresponding one of said plurality of network terminators are connected by a PVC (Permanent Virtual Circuit) connection.

17. A substitution call control system according to claim 16, wherein a VPI/VCI value (a value of VP identifier/VC identifier) of said PVC connection is 0/5.