ATM switching architecture for a wireless telecommunications network

• US 6,240,078 B1
• Filed: 08/13/1998
• Issued: 05/29/2001
• Est. Priority Date: 08/20/1997
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC USA Inc (NEC Corporation)
• Inventors: Kuhnel, Thomas, Varlese, Christopher
• Primary Examiner(s): Olms, Douglas
• Assistant Examiner(s): VANDERPUYE, KENNETH N
• Application Number:
  US09/133,843
• Time in Patent Office: 1,020 Days
• Field of Search: 370/331, 370/328, 370/397, 370/398, 370/395, 370/338, 370/332, 370/333, 370/329
• US Class Current: 370/331
• CPC Class Codes: H04L 2012/5607 Radio
• CPC Class Codes: H04L 2012/5619 Network Node Interface, e.g. tandem connections, transit switching
• CPC Class Codes: H04L 49/105 ATM switching elements
• CPC Class Codes: H04L 49/20 Support for services
• CPC Class Codes: H04L 49/254 Centralised controller, i.e. arbitration or scheduling
• CPC Class Codes: H04L 49/30 Peripheral units, e.g. input or output ports
• CPC Class Codes: H04L 49/3063 Pipelined operation
• CPC Class Codes: H04L 49/552 by ensuring the integrity of packets received through redundant connections
• CPC Class Codes: H04W 36/00 Hand-off or reselection arrangements

Abstract

An ATM switching architecture for a wireless telecommunications network includes two separate units having different functionality. The first unit performs mobility control, wherein a virtual path which contains all virtual channels of a mobile terminal is switched from a first port associated with a first access point, to a second port connected to a first port of the second unit. The second unit performs a switching operation, wherein the virtual channels of the mobile terminal are distributed from the first port of the second unit to different destination ports of the second unit. In one embodiment, the two units may be dedicated hardware components, and in another embodiment, one single hardware component is functionally separated into two separate units connected by a loopback link.

Claims

1. An ATM switching architecture for a wireless telecommunications network, comprising:

a plurality of ports for a plurality of access points of a wireless communication system;

means for performing switching operations and mobility control including a first unit for performing a mobility related switching and a second unit for performing a VP/VC connection related switching,

wherein said first unit switches a virtual path containing all virtual channels of a mobile terminal from a first port of said first unit associated with a first access point, to a second port of said first unit connected to a first port of said second unit, and

wherein said second unit distributes said all virtual channels of said mobile terminal from said first port of said second unit to different destination ports in said second unit.

2. The ATM switching architecture according to claim 1, wherein the first unit and the second unit are implemented in separate dedicated hardware components.

3. The ATM switching architecture according to claim 1, wherein the first unit and the second unit are implemented in functionally separate units of a single hardware component and are connected by a loopback link.

4. The ATM switching architecture according to claim 1, wherein the second unit contains a signaling unit connected to the mobile terminal by a virtual channel for controlling a user communication.

5. The ATM switching architecture according to claim 1, wherein a handover buffer is inserted in a link between said first and said second units.

6. The ATM switching architecture according to claim 2, wherein the second unit contains a signaling unit connected to the mobile terminal by a virtual channel for controlling a user communication.

7. The ATM switching architecture according to claim 3, wherein the second unit contains a signaling unit connected to the mobile terminal by a virtual channel for controlling a user communication.

8. The ATM switching architecture according to claim 2, wherein a handover buffer is inserted in a link between said first and said second units.

9. The ATM switching architecture according to claim 3, wherein a handover buffer is inserted in the loopback link (14;

20) between said first and said second units.

10. The ATM switching architecture according to claim 4, wherein a handover buffer is inserted in a link between said first and said second units.

11. The ATM switching architecture according to claim 5, wherein, said handover buffer is a FIFO buffer.

12. A method for switching ATM signals in a wireless telecommunications network, comprising:

providing a plurality of ports for a plurality of access points of a communications system;

performing mobility related switching of a virtual path containing all virtual channels of a mobile terminal from a first port of a first switching unit associated with a first access point to a second port of the first switching unit;

providing said all virtual channels from the second port of the first switching unit to a first port of a second switching unit;

distributing each of said all virtual channels from the first port of the second switching unit to an appropriate one of a plurality of destination ports in the second unit.