Antenna pattern selection within a wireless network

• US 20080248802A1
• Filed: 04/09/2007
• Published: 10/09/2008
• Est. Priority Date: 04/09/2007
• Status: Abandoned Application

• Current Assignee: NDSSI IP Holdings LLC (Novanta Inc.)
• Original Assignee: TZero Technologies Incorporated (Novanta Inc.)
• Inventors: Krishnamoorthy, Rajeev
• Application Number:
  US11/784,624
• Publication Number:
  US 20080248802A1
• Time in Patent Office: Days
• US Class Current: 455/445
• CPC Class Codes: H01Q 3/2605 Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
• CPC Class Codes: H04B 17/336 Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
• CPC Class Codes: H04B 7/0689 using different transmission schemes, at least one of them being a diversity transmission scheme
• CPC Class Codes: H04W 16/28 using beam steering

Abstract

A method of a multiple antenna node within a wireless network selecting an antenna pattern is disclosed. The method includes identifying a plurality of transmission paths through the node. One of a plurality of antenna patterns formed by the multiple antenna node is selected, providing a desired level of link quality through each of the identified plurality of transmission paths. The node wirelessly communicates through the identified transmission paths.

Claims

1. A method of a multiple antenna node within a wireless network selecting an antenna pattern, comprising:

identifying a plurality of transmission paths through the node;

selecting one of a plurality of antenna patterns formed by the multiple antenna node, providing a desired level of link quality through each of the identified plurality of transmission paths;

the node wirelessly communicating through the identified transmission paths.

2. The method of claim 1, wherein the selected antenna pattern forms beams that are focused in a plurality of directions as defined by the plurality of transmission paths.

3. The method of claim 1, further comprising:

selecting an omni-directional antenna pattern;

characterizing transmission channels of the identified plurality of transmission paths; and

independently receiving signals of the plurality of transmission channels.

4. The method of claim 3, wherein characterizing transmission channels comprises training the transmission channels.

5. The method of claim 4, wherein the independently received signals are received using spatial multiplexing processing.

6. The method of claim 1, wherein the node wirelessly receives through the identified transmission paths using receive antenna diversity.

7. The method of claim 1, wherein the desired level of link quality is determined by a requested Quality of Service (QoS).

8. The method of claim 7, wherein the QoS of received signals is determined by at least one of BER, PER, SINR, Latency, and jitter.

9. The method of claim 1, further comprising scheduling transmission and reception through the plurality of transmission paths in at least one of time, code and frequency slots.

10. The method of claim 9, wherein selecting one of the antenna patterns is determined by the scheduling, and by a requested link quality of the plurality of identified transmission paths.

11. The method of claim 10, wherein the selected antenna pattern varies according to the scheduling, and according to varying pluralities of identified transmission paths.

12. The method of claim 1, further comprising selecting one of a plurality of antenna patterns formed by the multiple antenna node based upon a desired signal rejection of signals transmitted from devices of the wireless network that are not part of the identified plurality of transmission paths.

13. The method of claim 1, further comprising selecting one of a plurality of antenna patterns formed by the multiple antenna node based upon a desired signal rejection of signals transmitted from devices that are not a part of the wireless network.

14. The method of claim 1, further comprising:

the node receiving link quality feedback from a plurality of devices of the wireless network.

15. The method of claim 14, further comprising:

the node identifying the plurality of transmission paths through the node based on the link quality feedback.

16. The method of claim 15, further comprising generating a schedule of transmission and reception of the node, and selecting the antenna patterns corresponding with identified pluralities of transmission paths based on the schedule.

17. A method of receiving transmission signals through a plurality of antennas, comprising:

adjusting at least one beam formed by the plurality of antennas by adjusting at least one of a phase and amplitude of at least one of signals received through the plurality of antennas, wherein the at least one beam is focused to receive signals from a intended target transmitter;

measuring a beam formed SINR of signals received from the intended target transmitter;

adjusting the plurality of antennas to omni-directionally receive transmission signals from the intended target transmitter;

characterizing a transmission channel from the target transmitter by receiving training signals;

measuring an omni-directional SINR of signals received from the intended target transmitter and processed according to the characterized transmission channel;

setting the plurality of antennas to directionally receive or omni-directionally receive signals from the intended target transmitter based on whether the beam formed SINR is greater or less than the omni-directional SINR.

18. The method of claim 17, wherein setting the plurality of antennas to directionally receive or omni-directionally receive signals from the intended target receiver further comprises evaluating a Quality of Service of the directionally received signals and a Quality of Service of the omni-directionally received signals.

19. The method of claim 17, wherein adjusting at least one beam formed by the plurality of antennas by adjusting at least one of a phase and amplitude of at least one of signals received through the plurality of antennas comprises referring to information regarding locations of transmitters obtained from previous interactions with the transmitters and interferers.

20. The method of claim 17, wherein adjusting at least one beam formed by the plurality of antennas by adjusting at least one of a phase and amplitude of at least one of signals received through the plurality of antennas comprises adjusting through N previously determined combinations of phase and amplitude settings.

21. The method of claim 17, wherein adjusting at least one beam formed by the plurality of antennas by adjusting at least one of a phase and amplitude of at least one of signals received through the plurality of antennas comprises adaptively converging on phase and amplitude settings to maximize SINR of the received signals.

22. The method of claim 17, further comprising receiving signals from multiple intended target transmitters, and setting the plurality of antennas to directionally receive or omni-directionally receive signals from each of the intended target transmitters based on whether the beam formed SINR is greater or less than the omni-directional SINR for each of the intended transmitters.

23. The method of claim 22, wherein adjusting at least one beam formed by the plurality of antennas by adjusting at least one of a phase and amplitude of at least one of signals received through the plurality of antennas for each of the intended target transmitters is at least partially controlled by scheduling of transmissions between the intended target transmitters and the receiver.

24. The method of claim 23, wherein the receiver is within a node of a mesh network, and the target transmitters are other nodes of the mesh network.

25. The method of claim 24, further comprising the node receiving signals from multiple of the other node when the plurality of antennas are set to directionally received signals.

26. A method of transmitting signals through a plurality of antennas, comprising:

adjusting at least one beam formed by the plurality of antennas by adjusting at least one of a phase and amplitude of at least one of signals transmitted through the plurality of antennas, wherein the at least one beam is focused to transmit signals to a intended target receiver;

measuring a beam formed SINR of signals received at the target receiver;

adjusting the plurality of antennas to omni-directionally transmit transmission signals to the intended target receiver;

characterizing a transmission channel to the target receiver by transmitting training signals;

measuring an omni-directional SINR of signals received by the intended target receiver and processed according to the characterized transmission channel;

setting the plurality of antennas to directionally transmit or omni-directionally transmit signals to the intended target receiver based on whether the beam formed SINR is greater or less than the omni-directional SINR.