Mobile device with integrated duplex radio capabilities

• US 9,538,570 B2
• Filed: 12/07/2015
• Issued: 01/03/2017
• Est. Priority Date: 12/05/2014
• Status: Active Grant

• Current Assignee: Dominant Technologies, LLC
• Original Assignee: Dominant Technologies, LLC
• Inventors: Fraser, Ronald H.
• Primary Examiner(s): SHIVERS, ASHLEY L
• Application Number:
  US14/961,621
• Publication Number:
  US 20160164658A1
• Time in Patent Office: 393 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/2656 for structure of frame, burst
• CPC Class Codes: H04L 41/0803 Configuration setting
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 48/00 Access restriction access security to prevent unauthorised access H04W12/08; Network selection; Access point selection
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/23 Manipulation of direct-mode connections
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

Wireless-conferencing radios communicate directly with each other without a bases station using a multiple access protocol, such as Time Division Multiple Access (TDMA). Wireless-conferencing radios can be formed into groups and larger mesh networks. Some groups of wireless-conferencing radios use frequencies in a cellular band to communicate.

Claims

1. A communication system for establishing direct full-duplex communications over a cellular frequency band, the communication system comprising:

a first radio; and

a second radio, wherein;

the first radio and the second radio are configured to transmit and receive directly with each other using time division multiple access before communicating with a cellular base station; and

the second radio is configured to;

transmit, to the cellular base station, a request to reserve a sub band of the cellular frequency;

receive a response to the request indicating that the sub-band has been reserved;

transmit to the first radio a reference to the sub band; and

transmit and receive directly with the first radio on the sub band using time division multiple access.

2. The communication system for establishing direct full-duplex communications over a cellular frequency band as recited in claim 1, wherein the second radio is a master radio and the first radio is a slave radio using time division multiple access.

3. The communication system for establishing direct full-duplex communications over a cellular frequency band as recited in claim 1, wherein the second radio is a slave radio and the first radio is a master radio using time division multiple access.

4. The communication system for establishing direct full-duplex communications over a cellular frequency band as recited in claim 1, further comprising a third radio configured to transmit and receive directly with the first radio and the second radio using time division multiple access before and after the second radio transmits the request to the cellular base station.

5. The communication system for establishing direct full-duplex communications over a cellular frequency band as recited in claim 1, wherein the reference to the sub band is a frequency number and/or a bandwidth.

6. The communication system for establishing direct full-duplex communications over a cellular frequency band as recited in claim 1, wherein the reference to the sub band is one or more digits referencing a frequency number and/or a bandwidth.

7. The communication system for establishing direct full-duplex communications over a cellular frequency band as recited in claim 6, wherein the one or more digits corresponds to a frequency channel.

8. A mobile device for establishing direct full-duplex communications over a cellular frequency band, the mobile device comprising:

a microphone configured to receive sound input;

a speaker configured to generate audible output;

a wireless transceiver configured to transmit and receive wireless signals across a cellular frequency band; and

one or more processors coupled to the microphone, the speaker, and the wireless transceiver, the one or more processors configured to;

establish direct, full-duplex communication with a second mobile device using time division multiple access;

transmit, via the wireless transceiver and after establishing direct, full-duplex communication with the second mobile device, to a cellular base station a request to reserve a sub-band of the cellular frequency band for direct, full-duplex communications; and

transmit and receive directly with the second mobile device on the sub-band of the cellular frequency band using time division multiple access.

9. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 8, wherein the one or more processors is further configured to:

receive a response to the request indicating that the sub-band has been reserved; and

transmit, using time division multiple access, a reference to the sub-band to the second mobile device.

10. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 9, wherein the one or more processors is further configured to transmit an assignment of a timeslot to another mobile device.

11. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 8, wherein the one or more processors is configured to determine that a cellular base station is not in range.

12. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 11, wherein the one or more processors is configured to use a default frequency band based for communicating directly with another mobile device based on determining that the cellular base station is not in range.

13. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 12, wherein the default frequency band is within the cellular frequency band.

14. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 12, wherein the default frequency band is within an unlicensed range.

15. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 14, wherein the default frequency band is in the range from 900 MHz to 970 MHz.

16. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 12, wherein the one or more processors is configured to periodically check if the mobile device is within range of a cellular base station after determining that a cellular base station is not in range.

17. The mobile device for establishing direct full-duplex communications over the cellular frequency band as recited in claim 8, wherein the one or more processors is further configured to establish direct, full-duplex communication with a third mobile device using time division multiple access, such that the mobile device transmits during one time slot to both the second mobile device and the third mobile device.

18. A method for establishing direct full-duplex communications using a cellular band, the method comprising:

establishing direct communication between a first mobile device and a second mobile device using time division multiple access;

transmitting, to a cellular base station after establishing direct communication between the first mobile device and the second mobile device, a request to reserve a sub band of the cellular frequency band using the first mobile device;

receiving, by the first mobile device, a response to the request indicating that the sub-band has been reserved;

transmitting to the second mobile device a reference to the sub band; and

transmitting and receiving, using the first mobile device, directly with the second mobile device using the sub band and time division multiple access.

19. The method for establishing direct full-duplex communications as recited in claim 18, wherein the transmitting and receiving directly with the second mobile device does not use the cellular base station.

20. The method for establishing direct full-duplex communications as recited in claim 18, further comprising transmitting and receiving with the second mobile device and a third mobile device on a frequency band outside the cellular frequency band before transmitting the request to reserve the sub band, wherein the frequency band outside the cellular frequency band is part of an open spectrum band.