Full-Duplex Mesh Networks

Patent metadata

Field	Value
Publication number	US-2016100415-A1
Application number	US-201514876808-A
Country	US
Kind code	A1
Filing date	Oct 6, 2015
Priority date	Oct 6, 2014
Publication date	Apr 7, 2016
Grant date	—

Abstract

Systems and methods relating to full duplex mesh networks are disclosed. In one embodiment, a mesh network comprising a plurality of transceiver nodes using a single frequency band may be disclosed, each transceiver node comprising: a first transceiver for transmitting and receiving to and from a backhaul node on the single frequency band; and a second transceiver for transmitting and receiving to and from an access node on the single frequency band, each transceiver of each transceiver node performing self-interference cancellation to send and receive full duplex data on the single frequency band at substantially the same time, thereby enabling the creation of a mesh network with at least one transceiver node having both access and backhaul using only the single frequency band.

First claim

1 . A mesh network comprising a plurality of transceiver nodes using a single frequency band, each transceiver node comprising:
a first transceiver for transmitting and receiving to and from a backhaul node on the single frequency band; and a second transceiver for transmitting and receiving to and from an access node on the single frequency band, each transceiver of each transceiver node performing self-interference cancellation to send and receive full duplex data on the single frequency band at substantially the same time,
thereby enabling the creation of a mesh network with at least one transceiver node having both access and backhaul using only the single frequency band.

2 . The mesh network of claim 1 , wherein the single frequency band is used by each of the plurality of transceiver nodes.

3 . The mesh network of claim 1 , wherein each transceiver comprises a single antenna for both transmitting and receiving on the single frequency band.

4 . The mesh network of claim 1 , wherein the single frequency band is LTE band 14 .

5 . The mesh network of claim 1 , wherein each transceiver of each transceiver node is capable of transmitting and receiving on one or more LTE frequency bands.

6 . The mesh network of claim 1 , wherein each transceiver is enabled to provide full-duplex communication.

7 . The mesh network of claim 1 , wherein each transceiver is a single antenna.

8 . The mesh network of claim 1 , wherein each transceiver forms a self-organizing mesh with access and backhaul without coordination from a core network.

9 . The mesh network of claim 1 , wherein each transceiver is an eNodeB.

10 . The mesh network of claim 1 , each transceiver node further comprising a self-interference cancellation circuit for canceling interference caused by transmissions from the first transceiver at the first transceiver, and for canceling interference caused by transmissions from the second transceiver at the second transceiver.

11 . The mesh network of claim 1 , each transceiver node further comprising a self-interference cancellation circuit for canceling interference caused by transmissions from the first transceiver at the second transceiver, and for canceling interference caused by transmissions from the second transceiver at the first transceiver.

12 . The mesh network of claim 1 , the backhaul node further comprising a modified LTE base station configured to use an LTE uplink band for sending data and an LTE downlink band for receiving data.

13 . A network node performing self-interference cancellation, comprising:
an integrated long term evolution (LTE) eNodeB; an integrated LTE user equipment (UE); and self-interference cancellation circuitry, the self-interference cancellation circuitry reducing radio frequency interference at the integrated LTE eNodeB caused by the transmission of signals by the integrated LTE UE, the self-interference cancellation circuitry further reducing radio frequency interference at the integrated LTE UE caused by the transmission of signals by the integrated LTE eNodeB.

14 . The network node of claim 13 , wherein the network node operates on LTE band 14 .

15 . The network node of claim 13 , wherein the network node operates on at least one of LTE bands 13 and 17 .

16 . The network node of claim 13 , wherein the network node operates on an uplink band and a downlink band; wherein the uplink band is used for receiving data from one or more UEs and also for sending data to a backhaul node; and wherein the downlink band is used for sending data to one or more UEs and also for receiving data from a backhaul node.

17 . The network node of claim 13 , wherein the integrated LTE eNodeB and the integrated LTE UE operate on one or two identical LTE bands.

18 . The network node of claim 13 , wherein the integrated LTE UE is used to provide backhaul for UEs connected to the integrated LTE eNodeB.

19 . A method of reducing radio frequency interference between a radio transmitter and a radio receiver physically co-located at a transceiver node, comprising:
performing linear digital self-interference cancellation for the radio receiver based on the radio transmitter; performing non-linear digital self-interference cancellation based on the radio transmitter; performing analog self-interference cancellation based on the radio transmitter; and sending and receiving radio frequency signals with self-interference cancellation to a mobile mesh network node.

20 . The method of claim 19 , further comprising physically separating antennas associated with the radio transmitter and the radio receiver, thereby further reducing radio frequency interference.

21 . The method of claim 19 , wherein the radio transmitter transmits on a first frequency band, and the radio receiver receives on the first frequency band.

22 . The method of claim 19 , wherein the radio transmitter transmits on a first frequency band, the radio receiver receives on a second frequency band, and the first and the second frequency bands are adjacent.

23 . The method of claim 19 , wherein the radio transmitter transmits on a first frequency band, the radio receiver receives on a second frequency band, and the first and the second frequency bands are non-adjacent and separated by a guard band.

24 . The method of claim 19 , wherein one of the radio transmitter or the radio receiver is an LTE radio.

25 . The method of claim 19 , wherein one of the radio transmitter or the radio receiver is a Wi-Fi radio, a television white space (TVWS) radio, or a microwave radio.

26 . The method of claim 19 , wherein self-interference cancellation is used to achieve at least 80 dB of self-interference cancellation for the radio receiver.

27 . The method of claim 19 , wherein self-interference cancellation is used to achieve between 100 dB and 110 dB of self-interference cancellation for the radio receiver.

28 . The method of claim 19 , wherein multiple-in, multiple out (MIMO) is used to increase the self-interference cancellation for the radio receiver.

29 . The method of claim 19 , wherein analog self-interference cancellation is used to cancel transmitter noise.

30 . The method of claim 19 , wherein analog self-interference cancellation is performed using a plurality of analog delay lines for assigning weights to an interpolation algorithm.

Assignees

• Parallel Wireless Inc

Inventors

• Mishra Rajesh Kumar
• Papa Steven Paul
• Cao Yang

Classifications

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04L5/14 Primary

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04W72/082 Primary

  Electricity · mapped topic