High bandwidth delivery and internet access for airborne passengers

{
  "publication_number": "US6201797B1",
  "country": "US",
  "kind": "B1",
  "title": "High bandwidth delivery and internet access for airborne passengers",
  "abstract": "A method and a communications system in which a request for data transmitted by an airborne transmitter over a low-bandwidth air-to-ground communication system uplink and received by a ground-based receiver. The requested data is then transmitted over a high-bandwidth communication system downlink, such as a DBS satellite system downlink, preferably using an MPEG-2 compression technique, and received by an airborne receiver located on the same aircraft as the airborne transmitter. The received request for data is transmitted to a data network that contains the requested data, such as the Internet or a private data network, using circuit-switched techniques. According to the invention, the requested data includes one of video information, audio information and textual information.",
  "claims": [
    "1. A method for air to ground communication, comprising the steps of: (a) transmitting a request for a data session from an air borne terminal via an airborne transceiver and first antenna using a low bandwidth downlink to a ground based gateway linked to a server connected to a data network; (b) transmitting a service initiation acknowledgement from the server to the airborne terminal via the ground based gateway, the low bandwidth downlink, the airborne transceiver and first antenna; (c) transmitting a data request from the airborne terminal to the data network via the airborne transceiver and first antenna, low bandwidth down link, the ground based gateway and the server; and (d) transmitting the requested data from the data network to the airborne terminal via a high bandwidth satellite uplink, an airborne receiver and second antenna.",
    "2. The method according to claim 1, wherein the uplink is part of a DBS satellite system.",
    "3. The method according to claim 1, wherein the data network is the Internet.",
    "4. The method according to claim 1, wherein the data network is a private network.",
    "5. The method according to claim 1, wherein the step of transmitting the requested data over the high-bandwidth communication system uplink includes the step of using an MPEG-2 compression technique for transmitting the requested data over the high-bandwidth communication system uplink using the second antenna.",
    "6. The method according to claim 1, wherein the requested data includes one of video information, audio information and textual information.",
    "7. The method of claim 1 further comprising the step of: (e) using an access management server to obtain the requested data from the data network and transmit the requested data to the airborne terminal via the high bandwidth satellite uplink and the airborne receiver and second antenna.",
    "8. An air to ground communication system, comprising (a) an airborne terminal coupled to an airborne transceiver and first antenna; (b) a low bandwidth downlink provided by the airborne transceiver and first antenna; (c) a ground based gateway for receiving the low bandwidth down link; (d) a data network coupled to the ground based gateway via a server; (e) a high bandwidth satellite uplink coupled to the data network; and (f) an airborne receiver and second antenna coupled to the uplink whereby a data request from the airborne terminal is transmitted to the data network via the airborne transceiver and first antenna, the low bandwidth down link, the ground based gateway and the server and the requested data is transmitted by the data network to the airborne terminal via the high bandwidth satellite uplink and the airborne receiver and second antenna.",
    "9. The system according to claim 8, wherein the uplink is part of a DBS satellite system.",
    "10. The system according to claim 8, wherein the data network is the Internet.",
    "11. The system according to claim 8, wherein the data network is a private network.",
    "12. The system according to claim 8, wherein the DBS satellite system uses an MPEG-2 compression technique for transmitting the requested data over the high-bandwidth communication system uplink using the second antenna.",
    "13. The system according to claim 8, wherein the requested data includes one of video information, audio information and textual information.",
    "14. The system of claim 8 further comprising: (g) an access management server coupled to the data network for obtaining and transmitting the requested data via the high bandwidth satellite uplink and the airborne receiver and second antenna."
  ],
  "description_excerpt": "1. Field of the Invention\n\nThe present invention relates to the field of telecommunications. More particularly, the present invention relates to a method and to a system for communicating between an airborne data terminal and a ground-based computer network.\n\n2. Description of Related Art\n\nThe ability for passengers on a commercial airline flight to make phone calls is well-known. Initially, such airborne telephone calls utilized an analog technology that was similar to that used by an airborne radio station broadcasting a modulated voice signal over a designated frequency to a ground-based station. The ground station interfaced with a Public Switched Telephony Network (PSTN) to complete the call. The analog approach suffers from problems associated with signal degradation, and requires a relatively large bandwidth for carrying a voice band signal.\n\nAn all digital air-to-ground telephony network service was introduced in 1993 in which voice signals are carried by an ISDN link on an aircraft to a radio link. Modern digital transmission and speech processing techniques are used on the voice signals before an airborne radio transmitter transmits an encoded digital voice signal to the ground where the voice signal is routed to the PSTN. The digital approach delivers a clearer voice quality than the analog approach, and allows evolving speech encoding techniques to carry more simultaneous voice calls over available communication channels.\n\nAt the time the all digital air-to-ground service was introduced, the only data service envisioned was facsimile and data modem-type calls to be made to ground-based stations or terminals.",
  "cpc": [
    "H04B 7/18508"
  ],
  "ipc": [
    "H04B 7/185"
  ],
  "assignees": [
    "AT&T Wireless Services Inc"
  ],
  "inventors": [
    "Ioan Leuca",
    "Wen-Ping Ying"
  ],
  "filing_date": "1997-12-12",
  "publication_date": "2001-03-13",
  "grant_date": "2001-03-13",
  "priority_date": "1997-12-12",
  "application_number": "US-98962297-A",
  "family_id": "25535296",
  "cited_by_count": 314,
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}