SYSTEMS AND METHODS FOR WIRELESS BACKHAUL TRANSPORT

• US 20160020844A1
• Filed: 03/14/2014
• Published: 01/21/2016
• Est. Priority Date: 03/14/2013
• Status: Abandoned Application

• Current Assignee: Google LLC (Alphabet Inc.)
• Original Assignee: Google Inc. (Alphabet Inc.)
• Inventors: Hart, Mike, Gelbman, Pete
• Application Number:
  US14/774,030
• Publication Number:
  US 20160020844A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 65/00 Network arrangements, protocols or services for supporting real-time applications in data packet communication real-time or near real-time messaging, e.g. instant messaging [IM] H04L51/04; selective video distribution H04N21/00
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 84/22 with access to wired networks

Abstract

Systems and methods are described for providing wireless backhaul transport. One element of the system is a highly integrated radio transceiver, including an integrated antenna. The radio transceiver may operate in the millimeter wave range (between 30 GHz and 300 GHz), and due to the small wavelengths, it is possible to integrate the antenna, which would typically compromise a number of antenna elements, with the radio transceiver in a single integrated circuit (IC) package, commonly referred to as a system-in-package (SiP) and/or antenna-in-package (AiP) format. In some implementations, the band that a hardware module can exploit is the unlicensed 60 GHz band, which is generally available globally.

Claims

1. A wireless communications module for communicating with a wireless device, comprising:

a packet processing function (PPF) configured to exchange communications between the wireless device and a network,

wherein the PPF is configured to exchange frames between the module and the wireless device, and

wherein the PPF is configured to communicatively couple with at least one other module at a first node;

a wireless MAC layer component, coupled to the PPF, and configured to forward frames across beamformed wireless communication links to a second node; and

a millimeter wave (30 GHz-300 GHz) physical layer and radio transceiver component coupled to the wireless MAC layer component,

wherein the physical layer and radio transceiver component includes a multi-element antenna array configured to provide the beamformed wireless links to the second node.

2. The wireless communications module of claim 1, wherein the PPF is a layer-2 switch.

3. The wireless communications module of claim 1, wherein the multi-element antenna array is further configured to operate in a bandwidth of 1 GHz or more.

4. The wireless communications module of claim 1,

wherein the wireless module is configured to operate in a first bandwidth under first conditions,

wherein the wireless module is configured to operate in a second bandwidth under second conditions,

wherein the second conditions are associated with a degradation of the beamformed wireless links between the first node and the second node, and

wherein the second bandwidth is less than the first bandwidth.

5. The wireless communications module of claim 1 wherein the wireless module is integrated in either an embedded or pluggable form at the first node to provide wireless backhaul connectivity for a host node.

6. The wireless communications module of claim 1 wherein the wireless MAC layer component is configured to provide dynamic multi-hop point-to-multipoint and/or mesh network topologies over a communication link using dynamic beam forming with directional transmissions.

7. The wireless communications module of claim 1, wherein the physical layer and radio transceiver component includes a first radio frequency integrated circuit (RFIC) coupled to a first set of antenna elements, and a second RFIC coupled to a second set of antenna elements,

wherein the first RFIC is configured to operate in a transmit mode and the second RFIC is configured to operate in a receive mode to provide the beamformed wireless links to the second node, and

wherein the second RFIC is configured to filter a signal transmitted by the first set of antenna elements from a signal received by the second set of antenna elements after the received signal has been digitized without the transmitted signal first being filtered from the received signal in an analog domain.

8. The wireless communications module of claim 7, wherein the first and second RFICs and the first and second antenna elements are configured to provide the beamformed wireless links to the second node for a self-organizing network that includes the wireless communication module.

9. The wireless communications module of claim 1,

wherein the physical layer and radio transceiver component includes:

an analog phased array beam-forming based RFIC, and

a multi-gigabit per second (Gbps) capable baseband processing element; and

wherein the wireless MAC layer component comprises a multi-Gbps beam-aware point-to-multi-point MAC processing engine.

10. The wireless communications module of claim 1,

wherein the physical layer and radio transceiver component includes at least two RFICs and a baseband engine,

wherein the at least two RFICs are configured to all operate in a transmit mode or a receive mode on a same channel at a same time, and

wherein the physical layer and radio transceiver component is configured to combine signals associated with each of the at least two RFICs either prior to or in the baseband engine.

11. The wireless communications module of claim 1,

wherein the physical layer and radio transceiver component includes at least two RFICs and a baseband engine,

wherein the at least two RFICs are configured to:

increase a gain of a signal of the beamformed wireless links to the second node by operating at least two of the RFICs in a transmit mode or a receive mode on a same channel at a same time, and

provide for a beamformed wireless link to a third node by operating at least one of the at least two RFICs in transmit mode for transmitting a signal to the second node and at least one of the at least two RFICs in receive mode for receiving a signal from the third node.

12. The wireless communications module of claim 7, wherein a quantity of antenna elements in the first set of antenna elements is greater than a quantity of transmit and/or receive chains so as to enable greater array gain.

13. The wireless communications module of claim 1,

wherein the physical layer and radio transceiver component includes a first RFIC coupled to a first set of antenna elements, and a second RFIC coupled to a second set of antenna elements,

wherein the physical layer and radio transceiver component includes a baseband processing engine,

wherein channels used for transmit and/or receive on the first RFIC and the second RFIC are defined in computer-executable instructions stored in a memory of the baseband processing engine, and

wherein a duplexing mode, including frequency division full-duplex (FDD) or time division full-duplex (TDD), is defined in computer-executable instructions stored in the memory of the baseband processing engine.

14. The wireless communications module of claim 1,

wherein the physical layer and radio transceiver component includes a RFIC coupled to a set of antenna elements,

wherein the physical layer and radio transceiver component is configured to perform software defined duplexing.

15. The wireless communications module of claim 1,

wherein the physical layer and radio transceiver component is configured to perform software defined duplexing for operation in the following modes:

a full duplex relay mode with full duplex links;

a full duplex relay with half duplex links;

a half duplex relay with full duplex links; and

a half duplex relay with half duplex links.

16. A network node for communicating with a wireless device, comprising:

a housing;

at least two wireless communications modules within the housing, wherein each wireless communications module includes;

a PPF configured to communicate with the wireless device,

wherein the PPF is configured to exchange frames between the module and the wireless device, and

wherein the PPF is configured to couple with at least one other module at the node;

a wireless MAC layer component, coupled to the PPF, and configured to forward frames across beamformed wireless communication links to another node; and

a millimeter wave (30 GHz-300 GHz) physical layer and radio transceiver component coupled to the wireless MAC layer component,

wherein the physical layer and radio transceiver component includes a multi-element antenna array configured to provide the beamformed wireless links to the other node.

17. The network node of claim 16 wherein the node communicates with at least two other nodes, wherein each node has provides a communication path between two end-points, wherein the nodes autonomously create the communication path and relay frames via one or more intermediate nodes without the need for external assistance, and wherein the nodes are able to dynamically update communication paths to adapt to changes in network topology.

18. The network node of claim 16, wherein the at least two wireless communications modules are configured to provide, in combination, functionality required at a hub, a relay station, an access point, or an end-point station.

19. An apparatus for communicating with a wireless device, comprising:

packet processing function means for exchanging packets or frames between the wireless device and a network;

MAC layer means, coupled to the packet processing function means, for forwarding frames across beamformed wireless communication links to a node; and

a millimeter wave (30 GHz-300 GHz) physical layer and radio transceiver means, coupled to the MAC layer means for providing the beamformed wireless links to the node.

20. A wireless communications module for communicating with a wireless device, comprising:

a packet processing function (PPF) configured to exchange communications between the wireless device and a network,

wherein the PPF is configured to exchange frames between the module and the wireless device, and

wherein the PPF is configured to communicatively couple with at least one other module at a first node;

a wireless MAC layer component, coupled to the PPF, and configured to forward frames across beamformed wireless communication links to a second node, and

a millimeter wave (30 GHz-300 GHz) physical layer and radio transceiver component coupled to the wireless MAC layer component,

wherein the physical layer and radio transceiver component includes a multi-element antenna array configured to provide the beamformed wireless links to the second node,

wherein the physical layer and radio transceiver component includes an RFIC that interfaces directly with the MAC layer,

wherein the physical layer and radio transceiver component includes a baseband processing engine;

wherein the wireless MAC layer is configured to drive the baseband processing engine and the RFIC concurrently based at least in part on a beam configuration specified by the MAC layer.

21. A method of controlling beamforming of an RFIC, the method performed by a processor executing instructions stored in a memory, the method comprising:

maintaining a mapping that associates antenna weight vector (AWV) identifiers (IDs) or antenna element map (AEM) IDs with nodes,

maintaining a mapping that associates AWV IDs with a phase shift and amplitude gain or AEM IDs with a vector or array element configuration parameter;

receiving an indication to create a beamformed wireless link with a node;

identifying an AWV ID or an AEM ID associated with the node based on the mapping;

identifying vector or array element configuration parameters associated with the AEM ID or a phase shift and amplitude gain associated with the AWV ID; and

configuring an antenna beam for the beamformed wireless link with the node by;

applying the vector or array element configuration parameters to an antenna element array transmitting a signal; and

/or

driving the antenna element array to generate the signal modified by the phase shift and/or amplitude gain associated with the AWV ID.

22. The method of claim 21, further comprising optimizing the vector or array element configuration parameter during a beam training, refinement, and/or tracking phase.

23. The method of claim 21, wherein the vector or array element configuration parameters include parameters for each polarization of the antenna element array, wherein the method further comprises:

applying the parameters for each polarization to the antenna element array;

driving the antenna element array to employ multiple-input-multiple-output techniques to transmit the signal and receive a different signal simultaneously over multiple polarizations.