Point to point link and communication method

• US 7,593,729 B2
• Filed: 01/18/2007
• Issued: 09/22/2009
• Est. Priority Date: 07/13/2006
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: DesignArt Networks Limited (Qualcomm, Inc.)
• Inventors: Touboul, Assaf, Barak, Oz
• Primary Examiner(s): Cumming; William D
• Application Number:
  US11/624,232
• Publication Number:
  US 20080080364A1
• Time in Patent Office: 978 Days
• Field of Search: 455/435.1, 455/456.3, 455/502, 455/562.1, 235/380, 370/330, 370/331, 370/352, 370/210, 370/235, 370/328, 725/62
• US Class Current: 455/435.1
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0669 using different channel coding between antennas space-time coding H04L1/0618
• CPC Class Codes: H04B 7/0671 using different delays between antennas
• CPC Class Codes: H04B 7/0874 using subgroups of receive antennas
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/06 using space diversity

Abstract

A method and point-to-point link for providing point-to-point wireless communication between a first and second node forming a link, the method including providing multiple concurrent transmissions from multiple antennas in an antenna array arrangement in the first node, controlling beam patterns of the antennas to manage deployment interference, and periodically allocating 1 to 3 MIMO (Multiple In Multiple Out) streams to different antennas in said antenna arrangement.

Claims

1. A method for providing point-to-point wireless communication between a first and second node forming a link, the method comprising:

providing multiple concurrent transmissions from multiple antennas in an antenna array arrangement in the first node to the second node;

controlling beam patterns of said antennas to reduce interference; and

allocating at least one MIMO (Multiple In Multiple Out) stream to different antennas in said antenna arrangement for said transmissions.

2. The method according to claim 1, wherein said step of allocating includes adaptively allocating said at least one MIMO stream in response to link conditions.

3. The method according to claim 1, wherein said antenna arrangement includes at least two directional antennas, and said step of controlling includes arranging said antennas to communicate in pre-selected directions.

4. The method according to claim 1, wherein said antenna arrangement includes a plurality of omni-directional antennas, and said step of controlling includes implementing beam-forming techniques.

5. The method according to claim 4, wherein said step of controlling includes utilizing beam-forming techniques to select beam patterns between 180°

to 60°

for said antennas.

6. The method according to claim 1, further comprising implementing OFDMA for said transmissions.

7. The method according to claim 1, further comprising utilizing modulation of at least 128 QAM for said transmissions.

8. The method according to claim 1, including adaptively allocating beam patterns to said antennas depending on link conditions.

9. The method according to claim 1, further comprising

implementing a modulation adaptation scheme in said controller;

and

allocating modulation between QPSK and 256 QAM in accordance with said scheme.

10. A point-to-point link in a wireless communications network, the link comprising:

two nodes coupled for wireless communication;

each node including an RF transceiver and associated modem;

an antenna arrangement in each said node for providing multiple concurrent transmissions;

said antennas having beam patterns selected for reducing interference;

a controller for allocating at least one MIMO stream to different antennas in said antenna arrangement for said transmissions; and

means in said controller for allocating said MIMO streams and allocating modulation to said antennas.

11. The link according to claim 10, wherein said antenna arrangement includes at least two directional antennas having beam patterns defined in advance.

12. The link according to claim 10, wherein said antenna arrangement includes a plurality of omni-directional antennas having configurable beam patterns.

13. The link according to claim 12, wherein said controller includes means for implementing smart antenna techniques to control said beam patterns.

14. The link according to claim 10, wherein said modem and said controller include means for implementing orthogonal frequency division multiple access (OFDMA) for transmissions over the link.

15. The link according to claim 14, wherein said controller allocates one of 512 or 1024 or 2048 FFT modulation, to improve robustness of link to multi-path.

16. A mobile broadband wireless link comprising:

two nodes;

each said node including;

an RF transceiver with associated modem;

an antenna arrangement having a beam pattern selected to improve quality of transmission and reduce interference coupled to said modem and arranged for multiple concurrent transmissions;

a MAC controller for controlling said transceiver, modem and antenna arrangement for providing both access and backhaul communication;

said controller including means for adaptively allocating at least one MIMO stream to different antennas in said antenna arrangement for said transmissions, depending on link conditions; and

said controller including means for allocating modulation to said antennas;

further said modem and MAC for providing orthogonal frequency division multiple access (OFDMA) for data transmitted between said two access points.

17. The link according to claim 16, wherein said antenna arrangement includes at least two directional antennas having beam patterns defined in advance.

18. The link according to claim 16, wherein said antenna arrangement includes a plurality of omni-directional antennas having beam patterns configurable by said MAC controller.

19. The link according to claim 16, wherein each node further includes a single radio-PHY-MAC module for providing access and backhaul communication.