Backhaul radio with advanced error recovery

• US 10,764,891 B2
• Filed: 11/28/2017
• Issued: 09/01/2020
• Est. Priority Date: 08/17/2011
• Status: Active Grant

• Current Assignee: COMS IP Holdings LLC
• Original Assignee: Skyline Partners Technology, LLC (COMSovereign Holding Corp.)
• Inventors: Boyer, Colby, Varadarajan, Badri, Negus, Kevin J.
• Primary Examiner(s): Phillips, Hassan A
• Assistant Examiner(s): Sharma, Gautam
• Application Number:
  US15/825,004
• Publication Number:
  US 20180084553A1
• Time in Patent Office: 1,008 Days
• Field of Search: None
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• CPC Class Codes: H01Q 25/005 providing two patterns of opposite direction; back to back antennas H01Q25/004 takes precedence
• CPC Class Codes: H01Q 5/50 Feeding or matching arrangements for broad-band or multi-band operation
• CPC Class Codes: H04B 2001/0408 with power amplifiers
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1614 using bitmaps
• CPC Class Codes: H04L 1/1678 where the control information is for timing, e.g. time stamps
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 25/03006 Arrangements for removing intersymbol interference
• CPC Class Codes: H04L 25/03019 adaptive, i.e. capable of adjustment during data reception
• CPC Class Codes: H04L 27/01 Equalisers baseband equalizers at the transmitter end H04L25/03343; in analogue transmission systems H04B3/04, H04B7/005
• CPC Class Codes: H04L 27/2636 : with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
• CPC Class Codes: H04L 27/2678 : using cyclostationarities, e.g. cyclic prefix or postfix
• CPC Class Codes: H04L 5/0007 : the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 : Time-frequency-space
• CPC Class Codes: H04L 5/0048 : Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/14 : Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 52/52 : using AGC [Automatic Gain Control] circuits or amplifiers
• CPC Class Codes: H04W 72/04 : Wireless resource allocation
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/046 : the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]

Abstract

A backhaul radio is disclosed that operates in multipath propagation environments such as obstructed LOS conditions with uncoordinated interference sources in the same operating band. Such a backhaul radio may use an advanced ARQ protocol, which uses an ACK_MAP, constructed by a combination of implicit and explicit signaling, and performs a combination of proactive and reactive retransmissions.

Claims

1. A backhaul radio comprising:

a plurality of receive radio frequency (RF) chains, wherein each receive RF chain is capable of converting from one of a plurality of receive RF signals to a respective one of a plurality of receive chain output signals;

a plurality of directive gain antenna elements; and

an automatic repeat request (ARQ) entity, wherein the ARQ entity is configured to use an ACK_MAP constructed by a combination of implicit and explicit signaling and perform a combination of proactive and reactive retransmissions.

2. The backhaul radio of claim 1, wherein the ARQ entity comprise an ARQ transmit controller and an ARQ transmission buffer, and wherein the ARQ transmit controller is configured to add a set of transmit data to and remove a set of transmit data from the ARQ transmission buffer.

3. The backhaul radio of claim 2, wherein the ARQ transmit controller is further configured to determine a transmit a transmit protocol data unit (PDU), wherein the transmit PDU is configured to be transmitted to a receiver using a wireless transmission channel.

4. The backhaul radio of claim 3, wherein the wireless backhaul radio is configured to receive a correct receive PDU or an error indicator.

5. The backhaul radio of claim 4, wherein the ARQ entity generates an ARQ feedback based on the correct receive PDU or the error indicator.

6. The backhaul radio of claim 2, wherein the ARQ transmit controller generates an ARQ header, and wherein the ARQ header comprises the ACK_MAP.

7. The backhaul radio of claim 1, wherein the ARQ entity generates an ARQ header, and wherein the ARQ header comprises the ACK_MAP.

8. The backhaul radio of claim 1, wherein the ARQ entity is configured to select a symbol stream and subframe slot to send an ARQ protocol data unit (PDU).

9. The backhaul radio of claim 8, wherein the ARQ PDU comprises one selected from the group consisting of a retransmission of a PDU in a sliding window, transmission of a new PDU added to the sliding window and a PDU containing only filler data.

10. The backhaul radio of claim 8, wherein the ARQ entity is further configured to submit the ARQ PDU for encoding and mapping to transmitter RF chains.

11. A fixed wireless access point comprising:

a plurality of receive radio frequency (RF) chains, wherein each receive RF chain is capable of converting from one of a plurality of receive RF signals to a respective one of a plurality of receive chain output signals;

a plurality of directive gain antenna elements; and

an automatic repeat request (ARQ) entity, wherein the ARQ entity is configured to use an acknowledgement map (ACK_MAP) constructed by a combination of implicit and explicit signaling and perform a combination of proactive and reactive retransmissions.

12. The fixed wireless access point of claim 11, wherein the ARQ entity comprise an ARQ transmit controller and an ARQ transmission buffer, and wherein the ARQ transmit controller is configured to add a set of transmit data to and remove a set of transmit data from the ARQ transmission buffer.

13. The fixed wireless access point of claim 12, wherein the ARQ transmit controller is further configured to determine a transmit a transmit protocol data unit (PDU), wherein the transmit PDU is configured to be transmitted to a receiver using a wireless transmission channel.

14. The fixed wireless access point of claim 13, wherein the wireless backhaul radio is configured to receive a correct receive PDU or an error indicator.

15. The fixed wireless access point of claim 14, wherein the ARQ entity generates an ARQ feedback based on the correct receive PDU or the error indicator.

16. The fixed wireless access point of claim 12, wherein the ARQ transmit controller generates an ARQ header, and wherein the ARQ header comprises the ACK_MAP.

17. The fixed wireless access point of claim 11, wherein the ARQ entity generates an ARQ header, and wherein the ARQ header comprises the ACK_MAP.

18. The fixed wireless access point of claim 11, wherein the ARQ entity is configured to select a symbol stream and subframe slot to send an ARQ protocol data unit (PDU).

19. The fixed wireless access point of claim 18, wherein the ARQ PDU comprises one selected from the group consisting of a retransmission of a PDU in a sliding window, transmission of a new PDU added to the sliding window and a PDU containing only filler data.

20. The fixed wireless access point of claim 18, further comprising a radio resource controller, wherein the radio resource controller is capable of setting specific selective couplings between the certain of the plurality of directive gain antenna elements and the certain of the plurality of receive RF chains according to the set of selective coupling settings.