Reconfigurable multi-radio bridge

Patent metadata

Field	Value
Publication number	US-12513591-B2
Application number	US-202117521635-A
Country	US
Kind code	B2
Filing date	Nov 8, 2021
Priority date	Nov 5, 2018
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Methods and systems describe herein relate to a reconfigurable multi-radio bridge that may connect a local area network (LAN) with an access point (AP) or other WAP to the backhaul and may dynamically change and/or select transmission methods. An example implementation of a reconfigurable multi-radio bridge performs a method including discovering a topology of a network that includes one or more wireless stations (STAs), evaluating a metric for each of at least two routes discovered in the topology, receiving a packet that identifies a first STA of the one or more STAs as an intended destination of the packet, selecting a route of the at least two routes over which to send the packet based on the metric, and sending the packet from a reconfigurable multi-radio bridge over the selected route toward the first STA.

First claim

What is claimed is:

1 . A method of dynamic route selection, the method comprising:
collecting metrics for one or more wireless stations (STAs) in a network that includes the one or more STAs; receiving a packet that identifies a first STA of the one or more STAs as an intended destination of the packet; dynamically selecting a route of two or more routes in the network over which to send the packet based on the metrics, each of the two or more routes reaching the first STA, the route including both a first channel and a second channel; and sending the packet from a reconfigurable multi-radio bridge over the selected route toward the first STA by sending the packet substantially simultaneously over the first channel and the second channel.

2 . The method of claim 1 , wherein:
the sending comprises sending the packet over a first route at a first time, the first route dynamically selected depending on first values of the metrics at the first time; the method further comprises dynamically selecting a second route of the two or more routes over which to send a second packet intended for the first STA based on the metrics at a second time, the second route dynamically selected depending on second values of the metrics at the second time.

3 . The method of claim 1 , wherein:
the network further includes an access point (AP); selecting the route over which to send the packet comprises selecting a distributed multiple input multiple output (MIMO) route that includes both the first channel from the AP directly to the first STA and the second channel from the reconfigurable multi-radio bridge directly to the first STA; and sending the packet over the selected route comprises sending the packet over the distributed MIMO route that includes both the first channel and the second channel.

4 . The method of claim 3 , further comprising:
deriving first precoders to use for the first channel and the second channel when operated as independent routes; and deriving second precoders to use for the first channel and the second channel when operated together as the distributed MIMO route.

5 . The method of claim 1 , wherein:
the reconfigurable multi-radio bridge is configured to provide a backhaul link to a base station; the two or more routes include a first route that reaches the first STA through a backhaul relay link to a second reconfigurable multi-radio bridge and a second route that bypasses the second reconfigurable multi-radio bridge to reach the first STA; selecting the route comprises selecting the first route; and sending the packet from the reconfigurable multi-radio bridge over the selected route toward the first STA comprises sending the packet to the second reconfigurable multi-radio bridge over the backhaul relay link.

6 . The method of claim 1 , wherein the metrics include at least one of:
channel state information (CSI); link quality; delay time; number of hops; jitter; supported modulation and coding scheme (MCS); received signal strength indicator (RSSI); clear channel assessment (CCA) level; interference; estimated throughput; airtime; traffic priority; route congestion; and bridge/WAP load.

7 . A reconfigurable multi-radio bridge, comprising:
a first reconfigurable radio comprising a first transmit/receive (TX/RX) channel and a second TX/RX channel, wherein the first reconfigurable radio is configured to selectively transmit and receive data on the first TX/RX channel or the second TX/RX channel; and a second reconfigurable radio comprising a third TX/RX channel and a fourth TX/RX channel, wherein the second reconfigurable radio is configured to selectively transmit and receive data on the third TX/RX channel or the fourth TX/RX channel, wherein to selectively transmit and receive data, the reconfigurable multi-radio bridge is configured to:
collect metrics for one or more wireless stations (STAs) in a network that includes the one or more STAs;
receive a packet from a base station via backhaul link that identifies a first STA of the one or more STAs as an intended destination of the packet;
dynamically select a route of two or more routes in the network over which to send the packet based on the metrics, each of the two or more routes reaching the first STA, the selected route including both a first channel and a second channel; and
send the packet from the reconfigurable multi-radio bridge over the selected route toward the first STA by sending the packet substantially simultaneously over the first channel and the second channel.

8 . The reconfigurable multi-radio bridge of claim 7 , wherein:
send the packet comprises send the packet over a first route at a first time, the first route dynamically selected depending on first values of the metrics at the first time; and the reconfigurable multi-radio bridge is further configured to dynamically select a second route of the two or more routes over which to send a second packet intended for the first STA based on the metrics at a second time, the second route dynamically selected depending on second values of the metrics at the second time.

9 . The reconfigurable multi-radio bridge of claim 7 , wherein:
the network further includes an access point (AP); select the route over which to send the packet comprises select a distributed multiple input multiple output (MIMO) route that includes both an AP-to-STA channel from the AP directly to the first STA and a radio-to-STA channel from the reconfigurable multi-radio bridge directly to the first STA; and send the packet over the selected route comprises send the packet over the distributed MIMO route that includes both the AP-to-STA channel and the radio-to-STA channel.

10 . The reconfigurable multi-radio bridge of claim 9 , wherein the reconfigurable multi-radio bridge is further configured to:
derive first precoders to use for the AP-to-STA channel and the radio-to-STA channel when operated as independent routes; and derive second precoders to use for the AP-to-STA channel and the radio-to-STA channel when operated together as the distributed MIMO route.

11 . The reconfigurable multi-radio bridge of claim 7 , wherein:
the reconfigurable multi-radio bridge is further configured to provide the backhaul link to the base station; the two or more routes include a first route that reaches the first STA through a backhaul relay link to a second reconfigurable multi-radio bridge and a second route that bypasses the second reconfigurable multi-radio bridge to reach the first STA; select the route comprises select the first route; and send the packet from the reconfigurable multi-radio bridge over the selected route toward the first STA comprises send the packet to the second reconfigurable multi-radio bridge over the backhaul relay link.

12 . The reconfigurable multi-radio bridge of claim 7 , wherein:
the first TX/RX channel comprises a first baseband (BB) circuit, a first radio frequency (RF) circuit, a first front end module (FEM), and a first antenna; the second TX/RX channel comprises the first BB circuit, a second FEM, and a second antenna; the third TX/RX channel comprises a second BB circuit, a second RF circuit, a third FEM, and a third antenna; and the fourth TX/RX channel comprises the second BB circuit, a fourth FEM, and a fourth antenna.

13 . The reconfigurable multi-radio bridge of claim 7 , wherein:
the first reconfigurable radio comprises a millimeter (mm) wave radio; and the second reconfigurable radio comprises a centimeter (cm) wave radio.

14 . The reconfigurable multi-radio bridge of claim 7 , wherein:
the first reco

Assignees

• Maxlinear Inc

Inventors

• Dash Debashis
• Dehghan-Fard Hossein
• Duxbury Simon
• Ho Wanjui

Classifications

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W40/246

  Connectivity information discovery · CPC title

• H04W40/12

  based on transmission quality or channel quality · CPC title

• H04W40/16

  based on interference · CPC title

• H04L5/003

  Arrangements for allocating sub-channels of the transmission path · CPC title