Methods of operating an access point using a plurality of directional beams

• US 9,368,870 B2
• Filed: 03/16/2015
• Issued: 06/14/2016
• Est. Priority Date: 03/17/2014
• Status: Active Grant

• Current Assignee: Ubiquiti Inc.
• Original Assignee: Ubiquiti Networks, Inc. (Ubiquiti Inc.)
• Inventors: Ponnampalam, Vish, Dayanandan, Sriram, Sanford, John R., Pera, Robert J.
• Primary Examiner(s): MITCHELL, NATHAN A
• Application Number:
  US14/659,397
• Publication Number:
  US 20150264584A1
• Time in Patent Office: 456 Days
• US Class Current: 1/1
• CPC Class Codes: H01Q 1/12 Supports; Mounting means
• CPC Class Codes: H01Q 1/1228 on a boom
• CPC Class Codes: H01Q 13/206 Microstrip transmission line antennas
• CPC Class Codes: H01Q 15/08 formed of solid dielectric material
• CPC Class Codes: H01Q 21/0031 Parallel-plate fed arrays; Lens-fed arrays multibeam arrays H01Q25/008
• CPC Class Codes: H01Q 25/008 lens fed multibeam arrays
• CPC Class Codes: H01Q 3/24 varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• CPC Class Codes: H01Q 3/36 with variable phase-shifters
• CPC Class Codes: H01Q 3/46 Active lenses or reflecting arrays
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Multi-directional antenna apparatuses, which may include phased array antennas and/or arrays of multiple antennas, and methods for operating these directional antennas. In particular, described herein are apparatuses configured to operate as an access point (AP) for communicating with one or more station devices by assigning a particular directional beam to each access point, and communicating with each station device using the assigned directional beam at least part of the time. Methods and apparatuses configured to optimize the assignment of one or more directional beam and for communicating between different station devices using assigned directional beams are described.

Claims

1. A method of operating an access point in a wireless network, wherein the access point is configured to operate a plurality of directional beams, the method comprising:

transmitting a training packet from the access point and receiving response packets from a plurality of station devices, wherein the response packet includes an identifier specific to a directional beam transmitting the training packet and a priority value associated with one or more criteria for directional beam selection;

assigning each of the plurality of station devices one of the directional beams from the plurality of directional beams based on the received response packets;

allocating upstream timeslots to each of the plurality of station device and allocating general upstream timeslots that are not associated with a single station device;

receiving data at a first rate at the access device from a station device of the plurality of station devices during an upstream timeslot allocated to the station device and using the directional beam assigned for the station device;

receiving data at a second data rate at the access device from a station device of the plurality of station devices during a second upstream timeslot that is a general upstream timeslot;

wherein, for at least some of the plurality of station devices, the first rate has a different modulation scheme than the second rate.

2. The method of claim 1, wherein the first rate is higher than the second rate.

3. The method of claim 1, wherein receiving data at the second rate comprises using a directional beam that is different from the directional beam assigned to the station device.

4. The method of claim 1, further comprising allocating downstream timeslots to each of the plurality of stations devices and transmitting data at a third rate to a station device of the plurality of stations during a downstream timeslot allocated to the station device and using the directional beam assigned for the station device.

5. The method of claim 1, further comprising allocating downstream timeslots to each of the plurality of stations devices and transmitting data at the first rate to a station device of the plurality of stations during a downstream timeslot allocated to the station device and using the directional beam assigned for the station device.

7. The method of claim 1, further comprising receiving data at a fourth rate at the access device from a second station device of the plurality of station devices during a third upstream timeslot allocated to the second station device and using the directional beam assigned for the second station device;

receiving data at the second data rate at the access device from the second station device during a fourth upstream timeslot that is a general upstream timeslot.

8. The method of claim 1, further comprising transmitting data from the access point to one or more of the plurality of station devices.

9. The method of claim 1, further comprising transmitting data from the access point to one or more of the plurality of station devices, wherein transmitting data comprises transmitting data from a phase array antenna forming the access point, wherein the phase array antenna phase array antenna comprises phase angles associated with directional beams from the plurality of directional beams.

10. The method of claim 1, further comprising transmitting data from the access point to one or more of the plurality of station devices wherein transmitting data comprises transmitting data from a phase array antenna at different phase angles wherein the phase array antenna includes a plurality of phase shifters configured to select the directional beams of the access point.

11. The method of claim 1, further comprising transmitting data from the access point to one or more of the plurality of station devices wherein transmitting data comprises transmitting data from a phase array antenna at different phase angles wherein the phase array antenna includes a radio frequency (RF) lens configured to select the directional beams of the access point.

12. The method of claim 1, wherein the response packet includes a reference to the station device transmitting the response packet, as well as an indicator of one or more of:

signal strength;

packet error rate;

or a modulation scheme.

13. The method of claim 1, wherein the priority value associated with one or more criteria for directional beam selection comprises a carrier to interference noise ratio (CINR), an error vector magnitude (EVM) or both a CINR and EVM.

6. A method of operating an access point in a wireless network, wherein the access point is configured to operate a plurality of directional beams, the method comprising:

transmitting a training packet from the access point and receiving response packets from a plurality of station devices, wherein the response packet includes an identifier specific to a directional beam transmitting the training packet and a priority value associated with one or more criteria for directional beam selection;

assigning each of the plurality of station devices one of the directional beams from the plurality of directional beams as a downstream directional beam, based on the received response packets;

assigning each of the plurality of station devices one of the directional beams from the plurality of directional beams as an upstream directional beam, wherein at least one of the station devices has an assigned downstream directional beam that is different from its assigned upstream directional beam;

allocating upstream timeslots to each of the plurality of station device and allocating general upstream timeslots that are not associated with a single station device;

receiving data at a first rate at the access device from a station device of the plurality of station devices during an upstream timeslot allocated to the station device and using the directional beam assigned for the station device;

receiving data at a second data rate at the access device from a station device of the plurality of station devices during a second upstream timeslot that is a general upstream timeslot;

wherein, for at least some of the plurality of station devices, the first rate has a different modulation scheme than the second rate.