Virtual cells for wireless networks

• US 7,664,504 B2
• Filed: 07/14/2006
• Issued: 02/16/2010
• Est. Priority Date: 07/14/2005
• Status: Expired due to Fees

• Current Assignee: Wavestar Communications Systems LLC (Equitable IP Corporation)
• Original Assignee: Sandwave Ip, LLC
• Inventors: Bishop, Donald M.
• Primary Examiner(s): Le, Danh C
• Application Number:
  US11/457,577
• Publication Number:
  US 20070015514A1
• Time in Patent Office: 1,313 Days
• Field of Search: 455/446, 455/444, 455/441, 455/442, 370/328
• US Class Current: 455/446
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 36/18 for allowing seamless reselection, e.g. soft reselection
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 64/006 with additional information processing, e.g. for direction or speed determination

Abstract

In a network having multiple wireless transmitters, a mobile device operating with the network may be assigned one or more wireless transmitters as a virtual cell. Transmissions to the mobile device may be broadcast from several cells simultaneously, so that the mobile device will receive the transmissions in any of the areas covered by the cells. When the network determines that the mobile device is moving out of one cell area and into another, the virtual cell may move as well. The virtual cell may consist of one or many areas covered by a wireless network, and may have a shape that is determined by geography, trajectory, wireless coverage, or other factors.

Claims

1. A method comprising:

establishing communications with a first mobile device with a network comprising a plurality of radio transceivers;

determining that said first mobile device is communicating with a first of said plurality of radio transceivers;

establishing a first virtual cell of a first set of said plurality of radio transceivers wherein said first set of said plurality of radio transceivers are configured to transmit a first communication to said first mobile device substantially simultaneously, and wherein any of said first set of said plurality of radio transceivers are configured to receive a second communication from said first mobile device;

determining the type of data to be transmitted in said first communication and said second communication;

establishing communications with a second mobile device with a network comprising a plurality of radio transceivers;

determining that said second mobile device is communicating with a second of said plurality of radio transceivers; and

sending and receiving communications between said second mobile device and said second of said plurality of radio transceivers;

establishing a second virtual cell of a first set of said plurality of radio transceivers wherein said second set of said plurality of radio transceivers are adapted to transmit a third communication to said second mobile device substantially simultaneously, and wherein any of said second set of said plurality of radio transceivers are adapted to receive a fourth communication from said second mobile device.

2. The method of claim 1 further comprising:

selecting said first set of said plurality of radio transceivers based on the geographical positions of said first set of said plurality of radio transceivers.

3. The method of claim 1 further comprising:

determining a movement vector for said first mobile device.

4. The method of claim 3 further comprising:

determining a change in said movement vector; and

updating said first set of said plurality of radio transceivers based on said change.

5. The method of claim 3 further comprising:

determining that said movement vector is increasing; and

expanding said first virtual cell by adding at least one of said radio transceivers to said first virtual cell.

6. The method of claim 3 further comprising:

determining that said movement vector is decreasing; and

contracting said first virtual cell by removing at least one of said plurality of radio transceivers from said first virtual cell.

7. The method of claim 3 further comprising:

selecting said first set of said plurality of radio transceivers using said movement vector.

8. The method of claim 1 further comprising:

receiving said second communication by a subset of said plurality of radio transceivers; and

selecting said second communication from one of said subset of plurality of radio transceivers to relay.

9. The method of claim 8 wherein said second communication comprises a packet transmission, said packet transmission being received by at least two of said plurality of radio transceivers.

10. The method of claim 1, said plurality of radio transceivers being compliant with IEEE 802.11.

11. The method of claim 1, said data type comprising voice over Internet Protocol.

12. The method of claim 1, said data type comprising mobile telephony.

13. The method of claim 1, said first mobile device comprising a mobile telephone.

14. The method of claim 1 further comprising:

determining a location for said first mobile device; and

selecting said first set of said plurality of radio transceivers based in part on said location.

15. The method of claim 14, said location first said first mobile device being determined using a Global Positioning System operable on said first mobile device.

16. The method of claim 15 further comprising:

determining a movement vector for said first mobile device, said movement vector being determined at least in part using said Global Positioning System.

17. The method of claim 1, said transmitting said first communication comprising:

determining that a first packet was not received by said first mobile device; and

resending said first packet.

18. The method of claim 1 further comprising:

said first virtual cell comprising a predefined set of said plurality of radio transceivers based on a location for said first mobile device.

19. The method of claim 1 further comprising:

determining that said first mobile device has moved from a first location within said first virtual cell to a second location within said first virtual cell; and

dropping at least one of said plurality of radio transceivers from said first virtual cell.

20. The method of claim 19 further comprising:

adding at least one radio transceiver to said first virtual cell.