CA2485821A1 - Local area network with wireless client freedom of movement - Google Patents
Local area network with wireless client freedom of movement Download PDFInfo
- Publication number
- CA2485821A1 CA2485821A1 CA002485821A CA2485821A CA2485821A1 CA 2485821 A1 CA2485821 A1 CA 2485821A1 CA 002485821 A CA002485821 A CA 002485821A CA 2485821 A CA2485821 A CA 2485821A CA 2485821 A1 CA2485821 A1 CA 2485821A1
- Authority
- CA
- Canada
- Prior art keywords
- network
- board
- access points
- access
- vlans
- 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.)
- Granted
Links
- 230000002776 aggregation Effects 0.000 claims abstract 16
- 238000004220 aggregation Methods 0.000 claims abstract 16
- 238000000034 method Methods 0.000 claims abstract 6
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/354—Switches specially adapted for specific applications for supporting virtual local area networks [VLAN]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Abstract
A network with wireless connectivity, a vehicle connected to and including t he network and a method of managing network data flow. The network includes multiple wireless access points, each connected to an Ethernet aggregation switch. Each Ethernet aggregation switch is virtual local area network (VLAN ) aware and matches client traffic from connected access points with access VLANs. A virtual network switch maintains an association table between acces s VLANs and core VLANs. The virtual network switch uses the association table to manage free-form client traffic between mobile stations at access VLANs at connected Ethernet aggregation switches and appropriate core VLANs. The vehicle, including the network, may be a train with access points located trackside connecting train passengers to a public network, e.g., the Interne t. Wireless devices on the train may also connect to an on-board such network.< /SDOAB>
Claims (17)
1. A network with wireless access capability comprising:
a plurality of wireless access points;
at least one Ethernet aggregation switch, ones of said plurality of access points being connected to each said at least one Ethernet aggregation switch, each said Ethernet aggregation switch being virtual LAN (VLAN) aware and matching client traffic from connected said access points with access VLANs; and a free-form virtual network switch passing client traffic between said access VLANs at each said connected Ethernet aggregation switch and appropriate core VLANs.
a plurality of wireless access points;
at least one Ethernet aggregation switch, ones of said plurality of access points being connected to each said at least one Ethernet aggregation switch, each said Ethernet aggregation switch being virtual LAN (VLAN) aware and matching client traffic from connected said access points with access VLANs; and a free-form virtual network switch passing client traffic between said access VLANs at each said connected Ethernet aggregation switch and appropriate core VLANs.
2. A network as in claim 1, the free-form virtual network switch maintaining an association table between said access VLANs and said core VLANs.
3. A network as in claim 1 further comprising:
at least one mobile station moving through access point reception areas, wireless connection with said network being continued with said at least one mobile station as said mobile station moves between reception areas.
at least one mobile station moving through access point reception areas, wireless connection with said network being continued with said at least one mobile station as said mobile station moves between reception areas.
4. A network as in claim 3 wherein as said mobile station moves between reception areas, said free form virtual network switch identifies each change of reception area and updates said association table for said each change.
5. A network as in claim 1 further comprising:
a router routing traffic on said core VLANs between said virtual network switch and a public network;
a dynamic host configuration protocol (DHCP) server managing connection between said free form virtual network switch and said public network; and a gateway providing access control, network address translation and firewall security at said public network.
a router routing traffic on said core VLANs between said virtual network switch and a public network;
a dynamic host configuration protocol (DHCP) server managing connection between said free form virtual network switch and said public network; and a gateway providing access control, network address translation and firewall security at said public network.
6. A network as in claim 1 wherein at least two of said access points are connected to a hub forming an access point group, said hub connecting said access point group to said Ethernet aggregation switch.
7. A network as in claim 3 wherein said access points are located trackside along train tracks and at least one said mobile station is an on-board device in a train, said train further comprising:
an on-board network connected to said on-board device, whereby on-board wireless devices connect to said public network through said on-board network.
an on-board network connected to said on-board device, whereby on-board wireless devices connect to said public network through said on-board network.
8. A network as in claim 7 wherein said on-board device is a client wireless LAN
(WLAN) bridge connecting to trackside said access points.
(WLAN) bridge connecting to trackside said access points.
9. A network as in claim 8 wherein said on-board network comprises a plurality of on-board access points, passenger wireless devices on said train connecting to said on-board network through ones of said on-board access points.
10. A network as in claim 9 wherein said on-board network further comprises:
at least one on-board Ethernet aggregation switch, ones of said on-board access points being connected to said at least one on-board Ethernet aggregation switch, each said on-board Ethernet aggregation switch being virtual LAN
(VLAN) aware and matching client traffic from connected said on-board access points with one of said access VLANs; and an on-board free-form virtual network switch receiving client traffic from matched said access VLANs at each said connected on-board Ethernet aggregation switch and passing said client traffic to appropriate said core VLANs.
at least one on-board Ethernet aggregation switch, ones of said on-board access points being connected to said at least one on-board Ethernet aggregation switch, each said on-board Ethernet aggregation switch being virtual LAN
(VLAN) aware and matching client traffic from connected said on-board access points with one of said access VLANs; and an on-board free-form virtual network switch receiving client traffic from matched said access VLANs at each said connected on-board Ethernet aggregation switch and passing said client traffic to appropriate said core VLANs.
11. A method of managing data flow in a wireless communications network between mobile stations and remote destinations connected to said mobile stations, said method comprising the steps of:
a) checking each received communications packet for a known address;
b) for each said received communications packet having a known address, determining if a previous port/virtual LAN correspondence has been changed for a device at said known address;
c) updating a port association table for each said communications packet wherein said port/virtual LAN correspondence is determined to have changed;
d) changing a virtual LAN tag for said each communications packet having an updated port/virtual LAN association; and e) switching said each communications packet to an identified port.
a) checking each received communications packet for a known address;
b) for each said received communications packet having a known address, determining if a previous port/virtual LAN correspondence has been changed for a device at said known address;
c) updating a port association table for each said communications packet wherein said port/virtual LAN correspondence is determined to have changed;
d) changing a virtual LAN tag for said each communications packet having an updated port/virtual LAN association; and e) switching said each communications packet to an identified port.
12. A method as in claim 11 wherein if a received said communications packet is a packet for a mobile station received from a Bore port and in step a) said address is determined to be unknown, said received communications packet is dropped.
13. A method as in claim 11 wherein if a received said communications packet is a packet from a mobile station and when in step a) said packet is determined not to be for a known address in step (c), an entry is made in said port association table for corresponding core and access virtual LAN and port assignments.
14. A method as in claim 11 wherein said address is a MAC address for a mobile station.
15. A vehicle in wireless communication with a wireless network over access points located along a vehicle path of travel, said vehicle comprising:
an on-board wireless LAN (WLAN) bridge connecting to pathside said access points;
an on-board network connected to said on-board WLAN bridge and on-board devices, said on-board devices connecting to a public network through said on-board network, said vehicle moving between reception areas of said pathside access points,
an on-board wireless LAN (WLAN) bridge connecting to pathside said access points;
an on-board network connected to said on-board WLAN bridge and on-board devices, said on-board devices connecting to a public network through said on-board network, said vehicle moving between reception areas of said pathside access points,
16 client traffic being seamlessly routed between said public network and said on-board devices.
16. A vehicle as in claim 15 wherein said vehicle is a passenger train, said path is a train route and said on-board network comprises a plurality of on-board access points, passenger wireless devices on said train connecting to said on-board network through ones of said on-board access points.
16. A vehicle as in claim 15 wherein said vehicle is a passenger train, said path is a train route and said on-board network comprises a plurality of on-board access points, passenger wireless devices on said train connecting to said on-board network through ones of said on-board access points.
17. A passenger train as in claim 16 wherein said on-board network further comprises:
at least one on-board Ethernet aggregation switch, ones of said on-board access points being connected to said at least one on-board Ethernet aggregation switch, each said on-board Ethernet aggregation switch being virtual LAN
(ULAN) aware and matching client traffic from connected said on-board access points with access VLANs; and an on-board free-form virtual network switch passing client traffic between matched said access VLANs at each said connected on-board Ethernet aggregation switch and appropriate core VLANs.
at least one on-board Ethernet aggregation switch, ones of said on-board access points being connected to said at least one on-board Ethernet aggregation switch, each said on-board Ethernet aggregation switch being virtual LAN
(ULAN) aware and matching client traffic from connected said on-board access points with access VLANs; and an on-board free-form virtual network switch passing client traffic between matched said access VLANs at each said connected on-board Ethernet aggregation switch and appropriate core VLANs.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/140,629 US7532604B2 (en) | 2002-05-08 | 2002-05-08 | Local area network with wireless client freedom of movement |
| US10/140,629 | 2002-05-08 | ||
| PCT/CA2003/000660 WO2003096623A1 (en) | 2002-05-08 | 2003-05-02 | Local area network with wireless client freedom of movement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2485821A1 true CA2485821A1 (en) | 2003-11-20 |
| CA2485821C CA2485821C (en) | 2010-01-26 |
Family
ID=29399474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2485821A Expired - Fee Related CA2485821C (en) | 2002-05-08 | 2003-05-02 | Local area network with wireless client freedom of movement |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7532604B2 (en) |
| EP (1) | EP1502390B1 (en) |
| JP (1) | JP4044929B2 (en) |
| KR (1) | KR100660242B1 (en) |
| CN (1) | CN100375452C (en) |
| AU (1) | AU2003223801B8 (en) |
| CA (1) | CA2485821C (en) |
| WO (1) | WO2003096623A1 (en) |
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2002
- 2002-05-08 US US10/140,629 patent/US7532604B2/en not_active Expired - Fee Related
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2003
- 2003-05-02 EP EP03720052A patent/EP1502390B1/en not_active Expired - Fee Related
- 2003-05-02 CN CNB038102641A patent/CN100375452C/en not_active Expired - Fee Related
- 2003-05-02 WO PCT/CA2003/000660 patent/WO2003096623A1/en active Application Filing
- 2003-05-02 KR KR1020047017906A patent/KR100660242B1/en active IP Right Grant
- 2003-05-02 CA CA2485821A patent/CA2485821C/en not_active Expired - Fee Related
- 2003-05-02 AU AU2003223801A patent/AU2003223801B8/en not_active Ceased
- 2003-05-02 JP JP2004504460A patent/JP4044929B2/en not_active Expired - Fee Related
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|---|---|
| CN1663179A (en) | 2005-08-31 |
| EP1502390A1 (en) | 2005-02-02 |
| EP1502390B1 (en) | 2012-12-19 |
| CN100375452C (en) | 2008-03-12 |
| US7532604B2 (en) | 2009-05-12 |
| KR20050027090A (en) | 2005-03-17 |
| AU2003223801A1 (en) | 2003-11-11 |
| CA2485821C (en) | 2010-01-26 |
| JP2005525048A (en) | 2005-08-18 |
| JP4044929B2 (en) | 2008-02-06 |
| WO2003096623A1 (en) | 2003-11-20 |
| KR100660242B1 (en) | 2006-12-20 |
| AU2003223801B9 (en) | 2008-02-07 |
| AU2003223801B2 (en) | 2007-09-27 |
| AU2003223801B8 (en) | 2009-06-18 |
| US20030210671A1 (en) | 2003-11-13 |
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