Access ports with directional antennas

• US 20070002802A1
• Filed: 06/30/2005
• Published: 01/04/2007
• Est. Priority Date: 06/30/2005
• Status: Abandoned Application

• Current Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Sekhar, Ramesh
• Application Number:
  US11/171,623
• Publication Number:
  US 20070002802A1
• Time in Patent Office: Days
• US Class Current: 370/334
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

An access port for use in a wireless network having a wireless switch in accordance with an exemplary embodiment of the present invention is provided. The access port includes a transceiver operable to send data based on routing information generated by the wireless switch. An antenna selector couples the transceiver and a plurality of antennas. The antenna selector is configured to selectively couple the transceiver with at least one of the plurality of antennas based at least in part on the routing information.

Claims

1. An access port for use in a wireless network having a wireless switch comprising:

a transceiver operable to send data based on routing information generated by the wireless switch;

a plurality of antennas; and

an antenna selector coupled between the transceiver and each of the plurality of antennas, the antenna selector configured to selectively couple the transceiver with at least one of the plurality of antennas based at least in part on the routing information.

2. The access port of claim 1 wherein the access port is operable to send data to the wireless switch via a wired access port coupled to the wireless switch by a wired connection.

3. The access port of claim 2 wherein the access port receives power over the wired connection.

4. The access port of claim 1 further comprising a processor coupled to the transceiver and the antenna selector, the processor operable to determine the at least one antenna of the plurality of antennas to couple to the transceiver.

5. The access port of claim 4 wherein the processor is further configured to determine which of the plurality of antennas to use to transmit to a mobile unit.

6. The access port of claim 5 wherein the processor is further configured to track a mobile unit as the mobile unit moves from a first area covered by a first directional antenna of the plurality of antennas to a second area covered by a second directional antenna of the plurality of antennas.

7. The access port of claim 6 wherein the processor is further configured to:

transmit a signal to the mobile unit using a current antenna of the plurality of antennas and wait for a response;

continue to use the current antenna to transmit the signal to the mobile unit if the response is received;

couple one or more additional antennas of the plurality of antennas and the current antenna to the transceiver and send the signal using the additional antennas and the current antenna if no response is received from the mobile unit;

select as the current antenna the antenna that received the signal with the greatest signal strength if a response is received; and

continue to couple additional antennas of the plurality of antennas to the transceiver and send a signal until a response is received and an antenna is determined to be the current antenna, or if all antennas have been used without receiving a response, determining that the mobile unit is out of the range of the antennas.

8. The access port of claim 1 wherein the antenna selector is configured to couple the transmitter to all of the plurality of antennas to broadcast a beacon signal.

9. The access port of claim 1 wherein each of the plurality of antennas are directional antennas.

10. The access port of claim 1 wherein the access port receives software updates from the wireless switch.

11. A method for sending a signal from an access port used in a wireless network that includes a wireless switch comprising:

receiving routing information from the wireless switch indicating a destination for the signal;

determining a first antenna selected from a plurality of directional antennas of the access port to use to send the signal;

coupling the first antenna to a transceiver of the access port through an antenna switch; and

sending the signal using the first antenna.

12. The method of claim 11 wherein the step of coupling the first antenna further comprises coupling all of the plurality of antennas to the transceiver to send a beacon signal.

13. The method of claim 11 further comprising:

transmitting a signal to a mobile unit using a current antenna and waiting for a response;

if the response is received, continuing to use the current antenna;

if no response is received from the mobile unit, coupling additional antennas of the plurality of antennas along with the current antenna to the transceiver and sending the signal using the additional antennas and the current antenna;

if a response is received, selecting as the current antenna the antenna that received the signal with the greatest signal strength; and

if a response is not received, continuing to couple additional antennas of the plurality of antennas to the transceiver and continuing to send a signal until a response is received and one of the pluralities antenna is determined to be the current antenna, or all antennas have been used without receiving the response, which indicates the mobile unit is out of the range of the access port.

14. The method of claim 13 wherein the step of transmitting a signal to the mobile unit using the current antenna and waiting for a response further comprises transmitting the signal a number of times without a response before determining the response has not been received.

15. The method of claim 14 wherein the step of continuing to couple additional antennas further comprises selecting one or more antennas adjacent to the current antenna as the additional antennas.

16. A wireless network comprising:

a plurality of access ports comprising;

a transceiver;

a plurality of antennas;

an antenna selector coupled between the transceiver and each of the plurality of antennas, the antenna selector configured to couple the transceiver with at least one of the plurality of antennas, and

a wireless switch coupled to the plurality of access ports, the wireless switch operable to determine routing information for each of the plurality of access ports.

17. The network of claim 16 wherein a portion of the plurality of access ports are directly coupled to the wireless switch.

18. The network of claim 16 wherein the access port further comprises a processor coupled to the transceiver and antenna selector, the processor operable to determine the one or more antennas from the plurality of antennas to couple to the transceiver.

19. The network of claim 18 wherein the processor is further configured to track a mobile the mobile unit moves from a first area covered by a first directional antenna of the plurality of antennas to a second area covered by a second directional antenna of the plurality of antennas.

20. The network of claim 16 wherein the wireless switch is configured to distribute software to each of the access ports.