WO2017172796A1 - Accès à une pluralité de noms de points d'accès par un système radio aéroporté pour un routage optimal vers des passerelles le long d'un trajet de vol - Google Patents

Accès à une pluralité de noms de points d'accès par un système radio aéroporté pour un routage optimal vers des passerelles le long d'un trajet de vol Download PDF

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Publication number
WO2017172796A1
WO2017172796A1 PCT/US2017/024576 US2017024576W WO2017172796A1 WO 2017172796 A1 WO2017172796 A1 WO 2017172796A1 US 2017024576 W US2017024576 W US 2017024576W WO 2017172796 A1 WO2017172796 A1 WO 2017172796A1
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WO
WIPO (PCT)
Prior art keywords
abr
access point
flight path
user
aircraft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2017/024576
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English (en)
Inventor
Nishi Kant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brocade Communications Systems LLC
Original Assignee
Brocade Communications Systems LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brocade Communications Systems LLC filed Critical Brocade Communications Systems LLC
Publication of WO2017172796A1 publication Critical patent/WO2017172796A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H04B7/18506—Communications with or from aircraft, i.e. aeronautical mobile service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/74—Address processing for routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/34—Modification of an existing route

Definitions

  • TITLE Accessing Multiple Access Point Names by Airborne Radio System for Optimal Routing to Gateways along a Flight Path
  • ATG Air to Ground
  • the satellite-based solution is slow and has long latency, which makes it unsuitable for interactive or streaming services.
  • the Air to Ground systems do not have satellite-like propagation delay and should be able to perform much better.
  • the ATG network has a set of base stations spread across the terrestrial coverage, e.g. in case of United States the base stations will be from coast to coast along the flight paths. This is shown in Fig. 1 for two exemplary flight paths between Miami (MIA) and San Francisco (SFO) and Newark (EWR) and San Francisco.
  • the ATG systems typically leverage 3G or 4G technologies, where an airborne radio (ABR) acts like a regular mobile handset or modem (user equipment or UE) for connecting to base stations and then base stations are connected to the terrestrial mobile network for connectivity to Internet or other networks.
  • ABR airborne radio
  • the ABR then acts as a modem connected to a Wi-Fi access point, which then accepts connections from the laptops, tablets and cell phones on the aircraft.
  • the core network has a mobility anchor (packet data network gateway /gateway GPRS support node or P-GW/GGSN) in the region that connects to the Internet.
  • the path from the UE is to radio towers (eNodeB or eNB).
  • the eNB then connects to an S-GW (serving gateway) and then the S-GW connects to the P-GW/GGSN (mobility anchor), which is a gateway to an external network such as the Internet.
  • the ABR-UE on the aircraft connects to radio towers in its vicinity.
  • a group of the eNBs are then served by a nearby S-GW.
  • the S-GW can connect to any P-GW depending on access point name (APN) based P-GW selection.
  • APN access point name
  • the nearest P-GW with Internet connectivity is selected.
  • a UE When a UE first attaches to the mobile network (say upon power up), it requests connectivity to the external network (e.g. Internet) as identified by an APN (Access Point Name).
  • the APN decides which P-GW/GGSN becomes anchor for the connecting UE.
  • the name resolution of the APN will point to a nearby P-GW/GGSN that serves that APN.
  • the UE gets to establish a new session/context with the P-GW. Depending on location or service sought, it may get connected to a different P-GW.
  • IP internet protocol
  • ATG solutions also suffer from long delays and perform poorly for interactive services.
  • the ATG service will have multiple regional datacenters with P-GWs.
  • P-GWs As an illustration, say a person watches 30 min. of video on a laptop soon after takeoff from SFO. Then the person takes a nap for 2 hours, then does Skype ® chatting using the laptop for the next fifteen minutes and then in the last one hour of flight he/she takes an aerial video of the New York area using the smartphone to be emailed to a colleague in Maine.
  • the way the ABR-UE to P-GW connection is setup it is clear to see that the user experience will be
  • Figures 1-3 are block diagrams of an ATG network according to the present invention at different times.
  • Figure 4 is a flowchart of ABR-UE and Wi-Fi AP operation according to the present invention.
  • Figure 5 is a block diagram of an S-GW or P-GW.
  • Figure 6 is a block diagram of a combined ABR-UE and Wi-Fi access point according to the present invention.
  • Figure 7 is a block diagram of a separate ABR-UE and a separate Wi-Fi access point according to the present invention.
  • Fig. 1 is a representation of an ATG network 100.
  • Various base stations 102 indicated by the radio towers, are positioned along the flight paths between MIA and SFO and EWR and SFO. Every few base stations 102 a P-GW 104A-J is shown for that group of base stations 102 for purposes of illustration.
  • An airplane 106 is illustrated having an ABR-UE and Wi-Fi access point 108 that is connected to a laptop 110 and a tablet 112 by Wi-Fi.
  • the S-GWs have not been shown for the sake of clarity. They can be collocated with the P-GW or can be deployed as a service architecture evolution gateway (SAE-GW).
  • SAE-GW service architecture evolution gateway
  • Embodiments according to the present invention reduce the propagation delays and overloading of P-GWs near airports by utilizing a method initiated from the onboard Wi-Fi AP and ABR-UE 108. Assume there are (n) P-GWs 104A-J along the flight path that can provide access to Internet. At the time of startup, the ABR-UE 108 initiates access to the (n) APNs. Each APN points to a specific P-GW 104A-J along the way. This also means that the ABR-UE 108 gets (n) IP addresses, one from each P-GW 104A-J.
  • the AP 108 When users connect to the Wi-Fi access point (AP) 108, the AP 108 assigns an IP address to the user device, such as a laptop 110 or tablet 112, and then NATs it to one of the ABR-UE IP addresses. By observing the time since the take-off, or by accessing the location on the flight map, the Wi-Fi AP 108 can simply select the ABR-UE IP address that is associated with the P-GW 104A-J closest to the aircraft for NATting purposes.
  • FIG. 1 This is illustrated in Figures 1-3.
  • the airplane 106 is leaving MIA bound for SFO.
  • the ABR-UE and Wi-Fi AP 108 has been started and connected to P-GWi 104A.
  • a flowi is commenced as soon as possible after takeoff at time Ti.
  • P-GWi 104A is the closest P-GW, flowi is connected to P-GWi 104A.
  • time has elapsed to time T2 and the airplane 106 has progressed to being over
  • a second user wishes to make a connection, in this case flow2.
  • the closest P-GW is now P-GW2 104C, so flow2 is routed to P-GW2 104C.
  • Flowi remains with P-GWi 104A at time T2.
  • additional time has elapsed to time T3, with the airplane 106 now over Iowa or Kansas.
  • a third user wishes to make a connection, in this case flow3.
  • the closest P-GW is now P-GW3 104H, so flow3 is assigned to use P-GW3 104H.
  • Flow2 remains with P-GW2 104C and flowi remains with P-GWi 104A.
  • the Wi-Fi AP 108 can extend this logic to new requests coming from the same user. Since it is NATting, every new flow coming from the new user or the same user can be optimally NATted to the ABR-UE IP address associated with the nearest P-GW 104A-J, e.g. a new HTTP request will have a unique 4-tuple of src-ip, dst-ip, src-port, dst-port which can be pointed to ABR-UE IP address3 (associated with P-GW3 104H) if that P-GW is closest to the aircraft 106. The returning traffic comes back to P-GW3 104H, which sends it back to ABR-UE 108, which forwards it to the Wi-Fi AP. The AP 108 looking at its NAT table sends it back to correct user.
  • step 402 the ABR-UE and Wi-Fi AP 108 is turned on, the initial cellular connection is made, the access point is activated and flight information is obtained.
  • step 404 the ABR-UE and Wi-Fi AP 108 determines the P-GWs with APNs along the flight path.
  • step 406 the ABR-UE and Wi-Fi AP 108 obtain an IP address from each determined P-GW. With this, the ABR-UE and Wi-Fi AP 108 is ready for operation.
  • step 408 the ABR-UE and Wi-Fi AP 108 determines if there is a Wi-Fi request, such as a request for a new transmission control protocol (TCP)/IP
  • a Wi-Fi request such as a request for a new transmission control protocol (TCP)/IP
  • the request can be a request to connect to a new IP address or a request for a new TCP port at an IP address that is used for an existing connection of the device. Conventionally this is done based on a message from a Wi-Fi AP program. If there is a Wi-Fi request, in step 410 the ABR-UE and Wi-Fi AP 108 determines the closest P-GW, based on time or flight path location, as noted above. In step 412, a local IP address is assigned to the Wi-Fi request, if one is not already assigned to the requesting device, and a NAT relationship is made with an IP address from the nearest P-GW. This is a many-to-many NAT situation, the IP addresses from the various P-GWs to local, internal IP addresses. The Wi-Fi process would then continue normally.
  • step 414 it is determined if it is time to reestablish any Wi-Fi connections to improve their performance. This step 414 is also performed if there is no Wi-Fi request in step 408. If it is time to reestablish a connection, in step 426 that connection is terminated. In step 418 the closest P-GW is determined and in step 420 the NAT relationship is changed so that the local IP address is now associated with an IP address from the closest P-GW. In step 422 a redirect is provided to the connected device so that the connection is reestablished. After step 422 or if it was not time to reestablish a connection in step 414, operation returns to step 408 waiting for a Wi-Fi request.
  • the reestablishment is optional, in which case operation returns to step 408 after step 412 or if there is no Wi-Fi request in step 408.
  • This operation can also be done in a UE itself, where each connection to a different APN/P-GW appears as an IP interface and the UE can select the interface based on its location or DNS information. Similarly, high-speed trains can also implement this operation.
  • S-GWs and P-GWs are complicated and expensive computer systems and packet routers, which include a processor 502, network interfaces or ports 508, a packet switch 506 for packet routing and a memory 504 to store programs and data.
  • the operations, such as those described here, are performed by programs stored in the memory and executing on the processor. Because the structure and operation of an S-GW and a P-GW are so well known, further details of their construction, configuration and operation are not provided here.
  • FIG. 6 is an exemplary block diagram of a combined ABR-UE and Wi-Fi AP 600 according to the present invention.
  • a processor 602 manages the operation and executes program contained in memory 606, such as flash memory.
  • a RAM 604 provides working storage.
  • a Wi-Fi network processor and RF chip 608 is connected to the processor 602 and handles the Wi-Fi communications.
  • An LTE modem and RF chip 610 is connected to the processor 602 and handles the cellular communications.
  • the memory 606 contains various programs executed on the processor 602.
  • First is an operating system 612.
  • Second is a W-Fi access point program 616 that performs the normal access point and Wi-Fi functions.
  • An LTE program 614 that handles the cellular communications.
  • An airborne program 618 handles the special operations of an ABR-UE and Wi-Fi access point, including most of the operations described herein including obtaining IP addresses from the P-GWs, providing the NAT operations and determining the closest P-GW. It is understood that the functions of the ABR-UE and Wi-Fi AP are substantially separate even though they may be located in the same device and share components, such as a processor, so that the functions may be referred to separately even though the ABR-UE and Wi-Fi AP are integrated into a single device.
  • the system 700 of Figure 7 is similar to the system 600 of Figure 6 except that the ABR-UE and Wi-Fi access point functions have been separated.
  • the Wi-Fi access point 703 includes a processor 702A that manages the operation and executes program contained in memory 706A, such as flash memory.
  • a RAM 704A provides working storage.
  • a Wi-Fi network processor and RF chip 708 is connected to the
  • the processor 702A and handles the Wi-Fi communications.
  • the memory 706A contains various programs executed on the processor 702A.
  • First is an operating system 712.
  • Second is a W-Fi access point program 716 that performs the normal access point and Wi-Fi functions.
  • An airborne program 718A handles Wi-Fi access point special operations described herein including providing the NAT operations.
  • An ABR-UE 701 includes a processor 702B that manages the operation and executes program contained in memory 706B, such as flash memory.
  • a RAM 704B provides working storage.
  • An LTE modem and RF chip 710 is connected to the processor 702B and handles the cellular communications.
  • the memory 706B contains various programs executed on the processor 702B.
  • First is an operating system 712.
  • Second is an LTE program 714 that handles the cellular communications.
  • An airborne program 718B handles the ABR-UE special operations, including obtaining IP addresses from the P-GWs and determining the closest P-GW.
  • the Wi-Fi access point processor 702A is connected to the ABR-UE processor 702B so that the two processors can communicate.
  • programs 718A and 718B contain the programs to allow this communication and the programs that handle the cooperative portions of operation.
  • any new connections can be anchored or sent to the nearest P-GW as the airplane crosses the country, thus reducing back haul and congestion on P-GWs near airports. If desired, existing connections can be migrated to closer P-GWs to further reduce backhaul.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un équipement d'utilisateur radio aéroporté (ABR-UE) et un point d'accès (AP) Wi-Fi (Wi-Fi AP) qui se connectent à toutes les passerelles P-GW avec des APN le long d'un trajet de vol et obtiennent une adresse IP de chacune d'entre elles. Lorsqu'un utilisateur souhaite exécuter une connexion via l'ABR-UE et le Wi-Fi AP, l'ABR-UE et le Wi-Fi AP déterminent la P-GW la plus proche et utilisent une adresse IP de cette P-GW pour exécuter une NAT avec une adresse IP locale du dispositif de l'utilisateur de sorte que des communications passent alors par la P-GW la plus proche. La P-GW sélectionnée change à mesure que l'avion vole et que le temps s'écoule, l'ABR-UE et le Wi-Fi AP utilisant la P-GW la plus proche pour toute nouvelle connexion.
PCT/US2017/024576 2016-03-31 2017-03-28 Accès à une pluralité de noms de points d'accès par un système radio aéroporté pour un routage optimal vers des passerelles le long d'un trajet de vol Ceased WO2017172796A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662315868P 2016-03-31 2016-03-31
US62/315,868 2016-03-31

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WO2017172796A1 true WO2017172796A1 (fr) 2017-10-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110312199A (zh) * 2018-03-20 2019-10-08 中兴通讯股份有限公司 一种地空互联的方法及装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090082013A1 (en) * 2007-09-20 2009-03-26 Honeywell International Inc. System and method for wireless routing of data from an aircraft
US20090186611A1 (en) * 2007-12-18 2009-07-23 Voyant International Corporation Aircraft broadband wireless system and methods
US20110292907A1 (en) * 2010-05-28 2011-12-01 Honeywell International Inc. Method and system for ground station signal handover for aircraft
WO2012004786A2 (fr) * 2010-07-06 2012-01-12 Semion Zelikman Procédé, système et supports pour la prestation de services de communication et de divertissement à bord de plateformes qui se déplacent
WO2014158766A1 (fr) * 2013-03-14 2014-10-02 Flextronics Ap, Llc Module embarqué de communication réseau de véhicule
WO2015181045A1 (fr) * 2014-05-28 2015-12-03 Lufthansa Systems Gmbh & Co. Kg Dispositif et procédé pour communication air-sol d'aéronef

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090082013A1 (en) * 2007-09-20 2009-03-26 Honeywell International Inc. System and method for wireless routing of data from an aircraft
US20090186611A1 (en) * 2007-12-18 2009-07-23 Voyant International Corporation Aircraft broadband wireless system and methods
US20110292907A1 (en) * 2010-05-28 2011-12-01 Honeywell International Inc. Method and system for ground station signal handover for aircraft
WO2012004786A2 (fr) * 2010-07-06 2012-01-12 Semion Zelikman Procédé, système et supports pour la prestation de services de communication et de divertissement à bord de plateformes qui se déplacent
WO2014158766A1 (fr) * 2013-03-14 2014-10-02 Flextronics Ap, Llc Module embarqué de communication réseau de véhicule
WO2015181045A1 (fr) * 2014-05-28 2015-12-03 Lufthansa Systems Gmbh & Co. Kg Dispositif et procédé pour communication air-sol d'aéronef

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110312199A (zh) * 2018-03-20 2019-10-08 中兴通讯股份有限公司 一种地空互联的方法及装置
CN110312199B (zh) * 2018-03-20 2021-07-02 中兴通讯股份有限公司 一种地空互联的方法及装置

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