Wireless network system with wireless access ports

• US 7,729,326 B2
• Filed: 05/31/2005
• Issued: 06/01/2010
• Est. Priority Date: 05/31/2005
• Status: Active Grant

• Current Assignee: Extreme Networks, Inc.
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Sekhar, Ramesh
• Primary Examiner(s): Kincaid; Lester
• Assistant Examiner(s): Khan; Mehmood B
• Application Number:
  US11/142,110
• Publication Number:
  US 20060268794A1
• Time in Patent Office: 1,827 Days
• Field of Search: None
• US Class Current: 370/338
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A communication system comprises a wireless switch, a plurality of wired access ports and a plurality of wireless access ports. The plurality of wired access ports are coupled to the wireless switch via a wired connection and are configured to receive data over the wired connection and over a wireless connection. The plurality of wireless access ports are configured to receive data over the wireless connection from the wireless access port and to send data over the wireless connection to the wired access port. The wireless access ports are further configured to receive and encapsulate first wireless data packets in to first wired data packets based on a wired transmission protocol and encapsulate the first wired data packets into second wireless data packets based on a wireless transmission protocol.

Claims

1. A communication system comprising:

a wireless switch;

a plurality of wired access ports coupled to the wireless switch via a wired connection and configured to receive data over the wired connection and over a first wireless connection; and

a plurality of wireless access ports each configured to receive data over a second wireless connection from a mobile user and to send data over the first wireless connection to the one of the plurality of wired access ports, the wireless access port further configured to

receive and to encapsulate first wireless data packets received from the mobile user into first wired data packets based on a wired transmission protocol including adding a header into the first wired data packets with a destination address field indicating an address of the wireless switch and

then to further encapsulate the first wired data packets into second wireless data packets based on a wireless transmission protocol including adding a header into the second wireless data packets with a destination address field indicating an address of the wired access port; and

wherein the wired access ports are each configured to receive the second wireless data packets from one of the plurality of wireless access ports and to extract the first wired data packets from the second wireless data packets received for subsequent transmission over the wired connection to the wireless switch.

2. The system of claim 1 wherein the wireless transmission protocol is an 802.11 protocol and the wired transmission protocol is an ethernet protocol.

3. The system of claim 1 wherein the wireless switch is configured to receive the first wired data packets from the wired access port, to extract the first wireless data packets from the first wired data packets, and to place a payload of the first wireless data packets into second wired packets for transmission outside the communication system.

4. The system of claim 3 wherein the wireless switch is further configured to remove the first wired data packets and encapsulate the first wired data packets into third wired data packets for transmission within the communication system, via the wireless access ports.

5. The method of claim 1 wherein a mobile unit operating in the communication system is configured to send data to the wireless access ports.

6. The system of claim 1 wherein the plurality of wired access ports download operational software upon boot-up from the wireless switch.

7. The system of claim 6 wherein the plurality of wireless access ports download the operational software from the wired access ports.

8. The system of claim 7 wherein a new wireless access port downloads operational software from one of the plurality of wireless access ports.

9. The system of claim 1 wherein the wired connection utilizes an ethernet protocol.

10. The system of claim 1 wherein a software update can be delivered to each of the plurality of wired access ports and each of the plurality of wireless access ports via the wireless switch.

11. The system of claim 1 wherein each of the plurality of wireless access ports can be added to the communication system without performing a survey of the site where the communication system is located.

12. The system of claim 1 wherein the wireless switch is a gateway to an external computer network.

13. An access port for use in a wireless local area network comprising:

an antenna coupled to the wireless receiver;

a wireless receiver coupled to the antenna and configured to receive data packets sent over a wireless link;

a wireless transmitter coupled to the antenna and configured to transmit data packets over the wireless link; and

a processor coupled to the wireless receiver and wireless transmitter, the processor configured to;

first encapsulate a first wireless data packet received by the wireless receiver into a first wired data packet using a wired data protocol including adding a header into the first wired data packet with a destination address field indicating an address of a wireless switch,

further encapsulate the first wired data packet into a second wireless data protocol including adding a header into the second wireless data packet with a destination address field indicating an address of a wired access port, and

transmit the second wireless data packet to the wired access port via a wireless connection, wherein the wired access port is connected to the wireless switch via a wired connection (105).

14. The access port of claim 13 wherein the processor is further configured to:

utilize the wireless receiver to recognize a second access port that is already part of the network;

send an initialization message to the second access port; and

receive a software image to load into memory and execute using the processor.

15. The access port of claim 13 wherein the wireless protocol is an 802.11 protocol.

16. The access port of claim 13 wherein the antenna comprises a receiver antenna coupled to the wireless receiver and a transmit antenna coupled to the wireless transmitter.

17. A method for transmitting wireless data packets from a wireless access port to a wireless switch comprising:

receiving a first wireless data packet by the wireless access port;

forming a first wired data packet by encapsulating the first wireless data packet into a wired data protocol frame;

adding a header into the first wired data packet with a destination address field indicating an address of the wireless switch;

forming a second wireless data packet by encapsulating the first wired data packet into a wireless frame,

adding a header into the second wireless data packet with a destination address field indicating an address of a wired access port; and

transmitting the second wireless data packet from the wireless access port to a wired access port via a wireless connection, wherein the wired access port is connected to the wireless switch via a wired connection.

18. The method of claim 17 further comprising receiving the second wireless data packet at the wired access port, stripping the first wired data packet from the second wireless data packet and sending the first wired data packet from the wired access port to the wireless switch.