PUBLIC SAFETY NETWORK RELAY SERVICE MANAGEMENT

• US 20150350859A1
• Filed: 05/29/2014
• Published: 12/03/2015
• Est. Priority Date: 05/29/2014
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: HIBEN, BRADLEY M.
• Granted Patent: US 9,467,835 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/15507 Relay station based processing for cell extension or control of coverage area, network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 40/22 using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A method and mobile device are provided that manage a relay service in a public safety wireless communication system. When the mobile device determines one or more of: another mobile device has exited or is exiting a public safety vehicle or another first mobile device is not receiving a signal from a wide area network of acceptable signal quality, the mobile device activates a relay service. In response to activating the relay service, the mobile device announces an availability of the relay service at the mobile device, receives a registration of the another mobile device for the relay service, and, in response to receiving the registration, relays communications between the another mobile device and an access node. In another embodiment, a method is provided for negotiating a provision of a relay service among multiple mobile devices, wherein each such mobile device currently is providing a relay service.

Claims

1. A method for managing a relay service in a public safety wireless communication system, the method comprising:

determining, at a second mobile device, one or more of;

a first mobile device has exited or is exiting a public safety vehicle;

or

the first mobile device is not receiving a signal from a wide area network of acceptable signal quality;

activating a relay service at the second mobile device;

in response to activating the relay service, announcing, by the second mobile device, an availability of the relay service at the second mobile device;

in response to announcing the availability of the relay service, receiving, by the second mobile device, a registration of the first mobile device for the relay service; and

in response to receiving the registration, relaying, by the second mobile device, communications between the first mobile device and an access node.

2. The method of claim 1, wherein the second mobile device is a vehicular mobile mounted device (VML) and the first mobile device is a handheld user device.

3. The method of claim 1, wherein determining that the first mobile device is not receiving a signal from a wide area network (WAN) of acceptable signal quality comprises:

determining a strength of a signal received by second mobile device from the WAN; and

based on the determined strength of the signal, estimating a strength of a signal received by the first mobile device from the WAN.

4. The method of claim 1, wherein determining that the first mobile device is not receiving a signal from the wide area network (WAN) of acceptable signal quality comprises:

monitoring signals exchanged between the first mobile device and an access node of the WAN.

5. The method of claim 1, wherein relaying, by the second mobile device, communications between the first mobile device and an access node comprises:

communicating, by the second mobile device with the first mobile device, over a short range wireless link; and

communicating, by the second mobile device with the access node, over a wide area network wireless link.

6. The method of claim 1, wherein announcing, by the second mobile device, an availability of the relay service at the second mobile device comprises:

broadcasting an announcement using a proximity service.

7. The method of claim 1, further comprising:

determining, by the second mobile device, to terminate the relay service; and

in response to determining to terminate the relay service, announcing, by the second mobile device, the termination of the relay service.

8. The method of claim 7, wherein determining to terminate the relay service comprises determining one or more of:

the first mobile device has returned to the public safety vehicle;

the public safety vehicle is moving;

or

the first mobile device is receiving a signal from a wide area network of acceptable signal quality.

9. A method for negotiating a provision of a relay service among a plurality of mobile devices in a public safety wireless communication system, the method comprising:

activating, by a first mobile device of the plurality of mobile devices, a relay service provided by the first mobile device;

discovering, by the first mobile device, a second mobile device of the plurality of mobile devices that provides a relay service; and

de-activating, by one of the first mobile device and the second mobile device, the relay service provided by that mobile device.

10. The method of claim 9, wherein each of the first mobile device and the second mobile device is a vehicular mobile mounted device (VML).

11. The method of claim 9, wherein de-activating, by one of the first mobile device and the second mobile device, the relay service provided by that mobile device is based on one or more of:

a number of handheld user devices that are being provided a relay service by each mobile device;

a wide area network signal quality metric associated with each mobile device; and

a time at which the relay service provided by each mobile device was activated.

12. The method of claim 9 further comprising:

maintaining, by each of the first mobile device and the second mobile device, an ordered list of mobile devices providing relay service; and

wherein de-activating comprises de-activating, by one of the first mobile device and the second mobile device, the relay service provided by that mobile device based on the ordered list maintained by that mobile device.

13. An apparatus for provision of providing a relay service in a public safety wireless communication system, the apparatus comprising:

a vehicular mobile mounted device (VML) comprising;

a first network interface that is configured to directly communicate with a mobile device;

a second network interface that is configured to directly communicate with an access node;

a processor that is configured to;

determine one or more of;

a mobile device has exited or is exiting a public safety vehicle;

or

the mobile device is not receiving a signal from a wide area network of acceptable signal quality;

activate a relay service at the VML;

in response to activating the relay service, announce an availability of the relay service at the VML;

in response to announcing the availability of the relay service, receive a registration of the mobile device for the relay service; and

in response to receiving the registration, relay communications between the mobile device and an access node via the first and second network interfaces.

14. The apparatus of claim 13, further comprising one or more sensing devices that are configured to provide an indication of whether a user of the mobile device has exited or is exiting the public safety vehicle.

15. The apparatus of claim 13, wherein the processor is configured to determine that the mobile device is not receiving a signal from a wide area network (WAN) of acceptable signal quality by:

determining a strength of a signal received by the vehicular mobile mounted device (VML) from the WAN; and

based on the determined strength of the signal, estimating a strength of a signal received by the mobile device from the WAN.

16. The apparatus of claim 13, wherein the processor is configured to determine that the mobile device is not receiving a signal from the wide area network (WAN) of acceptable signal quality by:

monitoring signals exchanged between the mobile device and an access node of the WAN.

17. The apparatus of claim 13, wherein the first network interface is configured to communicate with the mobile device over a short range wireless link and wherein the second network interface is configured to directly communicate with the access node over a wide area network wireless link.

18. The apparatus of claim 13, wherein the processor is configured to announce an availability of the relay service at the vehicular mobile mounted device (VML) by:

broadcasting an announcement using a proximity service.

19. The apparatus of claim 13, wherein the processor is configured to:

determine to terminate the relay service; and

in response to determining to terminate the relay service, announce the termination of the relay service.

20. The apparatus of claim 19, wherein the processor is configured to determine to terminate the relay service by determining one or more of:

the mobile device has returned to the public safety vehicle;

the public safety vehicle is moving;

or

the mobile device is receiving a signal from a wide area network of acceptable signal quality.