Method and apparatus for delivering IPP2T (IP-push-to-talk) wireless LAN mobile radio service

• US 7,738,407 B2
• Filed: 07/26/2002
• Issued: 06/15/2010
• Est. Priority Date: 08/03/2001
• Status: Expired due to Fees

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Murray, John F., Miller, Robert Raymond II, Rice, Christopher W, Chow, Albert T.
• Primary Examiner(s): HSU, ALPUS
• Application Number:
  US10/207,681
• Publication Number:
  US 20030053434A1
• Time in Patent Office: 2,881 Days
• Field of Search: 370/259, 370/338, 370/353, 370/390, 370/401, 370/432, 379/88.17, 379/93.07, 379/201.01, 455/414.1
• US Class Current: 370/259
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04L 67/55 Push-based network services
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services
• CPC Class Codes: H04W 80/00 Wireless network protocols or protocol adaptations to wireless operation
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A wireless subscriber terminal (ST) for use with IP push-to-talk (IPP2T) service using a wireless local area network (WLAN) operating in a plurality of modes, including a mobile terminal having an ability to communicate over the air to a wireless Access Point (AP), the mobile terminal further programmable to use conventional WLAN protocols, and a method for operating the wireless terminal are described.

Claims

1. A method for providing an Internet Protocol (IP) push-to-talk (IPP2T) service using a wireless local area network (WLAN) comprising:

receiving information and control signaling over an air interface from a subscriber terminal (ST) at an access point (AP) via the WLAN;

packetizing said information and control signaling by said AP;

forwarding said packetized information and control signaling between said AP and a broadband access network terminal (BANT) via a local area network (LAN);

sending said packetized information and control signaling between said BANT and a multicast-enabled network via a broadband access network; and

directing said packetized information and control signaling to a WLAN mobile radio system (WLMRS) controller (WLMRSC) via a multicast-enabled router (MR).

2. The method according to claim 1, further comprising sending said digitized speech over the air from said AP to a second ST via said WLAN.

3. The method according to claim 1, wherein said ST, said AP, said BANT and said WLMRSC all support a centralized contention and reservation request protocol for quality of service (QoS) driven WLANs.

4. The method according to claim 3, wherein said centralized contention and reservation request protocol for quality of service (QoS) driven WLANs is a Mediaplex protocol.

5. The method according to claim 3, wherein said ST, said AP, said BANT and said WLMRSC all support authentication, accounting and authorization services and associated network control and signaling exchange.

6. The method according to claim 5, wherein said network control and signaling exchange is based on IETF REC 2865 Remote Authentication Dial-In User Service (RADIUS) standard.

7. The method according to claim 3, wherein said ST, said AP, said BANT and said WLMRSC all support calls and features application using IP network protocols.

8. The method according to claim 3, wherein said AP, said BANT and said WLMRSC all support radio frequency (RF) and radio management processes related to IPP2T services.

9. The method according to claim 3, wherein said AP, said BANT and said WLMRSC all support operations, administration, maintenance and provisioning (OAM&

P) processes related to IPP2T services.

10. The method according to claim 3, wherein said AP, said BANT and said WLMRSC all support security management processes necessary for IPP2T services.

11. The method according to claim 10, wherein said security management processes include subscriber authentication and data encryption.

12. The method according to claim 10, wherein said security management processes includes selling up secure channels based on a network-based key management program.

13. The method according to claim 12, wherein a subscriber is deemed to be a part of a secure group by adding a personal security key.

14. The method according to claim 3, wherein said BANT supports media stream mixing and multicasting of said information associated with IPP2T services.

15. The method according to claim 3, wherein said WLMRSC supports system and subscriber database management.

16. The method according to claim 15, wherein said system and subscriber database management includes subscriber profiles, IPP2T multicast team assignments, authentication, accounting and authorization (AAA) services, mobility services and call and features applications.

17. The method according to claim 3, wherein said centralized contention and reservation request protocol for quality of service (QoS) driven WLANs supports a priority scheme such that emergency communications supersede regular LAN traffic.

18. The method according to claim 3, wherein said BANT and said WLMRSC support inter-working with other BANTs and WLMRSCs for IPP2T associated services, information and signaling and control information exchange.

19. The method according to claim 3, wherein said ST, said AP said BANT and said WLMRSC all support multicasting.

20. The method according to claim 3, wherein said ST, said AP said BANT and said WLMRSC all support multicast routing functions related to IPP2T service.

21. The method according to claim 3, wherein said ST, said AP said BANT and said WLMRSC all support mobility for said ST and personal and services management.

22. The method according to claim 21, wherein said IPP2T service is rendered to all subscribers of a group using an IEEE 802.11 device via a remote registration scheme and assignment of a temporary IP address.

23. The method according to claim 3, wherein said ST, said AP said BANT, said WLMRSC and said MR all support sending and receiving multicast applications associated with User Datagram Protocol (UDP), Internet Protocol (IP), Internet Control Message Protocol (ICMP) and Internet Group Management Protocol (IGMP).

24. The method according to claim 3, wherein said ST, said AP said BANT and said WLMRSC all support related network interface card (NIC) and drivers that filter IPP2T-related link layer and network IP layer multicast addresses.

25. The method according to claim 3, wherein said BANT and said WLMRSC support a firewall that permits IP multicast traffic.

26. The method according to claim 3, wherein said MR supports conventional IP information routing.

27. The method according to claim 3, wherein a MR database (DB) associated with said WLMRSC maintains IPP2T subscriber personal and service profiles.