Wireless relay device deployment methods and apparatus

• US 20080101325A1
• Filed: 10/31/2006
• Published: 05/01/2008
• Est. Priority Date: 10/31/2006
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Bao, Qi, Lee, Whay Chiou
• Application Number:
  US11/590,359
• Publication Number:
  US 20080101325A1
• Time in Patent Office: Days
• US Class Current: 370/345
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

In an embodiment, an adaptively-augmentable wireless network (100, FIG. 1) may include at least one mobile device (110-115) and at least one relay device (104-109). During network setup, a mobile device associated with a first host user may determine (505, FIG. 5) that no relay device signal is receivable by the mobile device which has an adequate signal quality. When an undeployed relay device is not available to the first host user, he mobile device may transmit (508) a deployment request message (700, FIG. 7). Another mobile device associated with a second host user may receive (902, FIG. 9) the deployment request message, and may determine (908) whether to initiate deployment of an undeployed relay device associated with the second host user. When the other mobile device decides to initiate deployment, it may transmit (912) a responsive deployment announcement message (800, FIG. 8). Accordingly, collaborative relay device deployment is achievable.

Claims

1. A method performed by a first device associated with a first host user, the method comprising:

making a deployment decision to initiate a deployment of an undeployed relay device associated with the first host user, in response to receiving a first message from an air interface, wherein the first message indicates that a second device is requesting deployment of the undeployed relay device.

2. The method of claim 1, wherein the undeployed relay device is a relay device in a finite set of relay devices available within an adaptively augmentable wireless communication network, and wherein the first message is a message in a set of messages that provides for collaborative deployment of the finite set of relay devices between multiple host users.

3. The method of claim 1, further comprising:

receiving the first message as a deployment request message, wherein the deployment request message includes a device identifier of the second device and information regarding a number of candidate mobile devices identified by the second device.

4. The method of claim 1, further comprising:

determining whether the undeployed relay device is available to the first host user.

5. The method of claim 1, wherein making the deployment decision comprises:

making the deployment decision to initiate the deployment of the undeployed relay device based on information regarding a number of candidate mobile devices identified by the second device.

6. The method of claim 5, wherein making the deployment decision comprises:

calculating a probability parameter,

generating a random number;

comparing the probability parameter to the random number; and

when the random number is less than the probability parameter, making the deployment decision to initiate the deployment of the undeployed relay device.

7. The method of claim 6, wherein calculating the probability parameter comprises:

calculating the probability parameter as 1/N, where N denotes the number of candidate mobile devices identified by the second device.

8. The method of claim 6, wherein calculating the probability parameter comprises:

calculating the probability parameter as

F_D[b]=min {R(t)2^b/R₀N, 1}

where R(t) denotes a current number of undeployed relay devices carried by the first host user, R₀ denotes an initial number of undeployed relay devices carried by the first host user, b denotes a backoff period counter value, and N denotes the number of mobile device neighbors identified by the second device.

9. The method of claim 5, wherein making the deployment decision comprises:

calculating a probability parameter,

generating a random number,

comparing the probability parameter to the random number; and

when the random number is greater than the probability parameter, waiting a backoff period for another device to deploy a relay device.

10. The method of claim 9, further comprising:

repeating calculating, generating, comparing, and waiting until either a relay device has been deployed or until repeating has occurred a predetermined maximum number of backoff periods.

11. The method of claim 1, further comprising:

transmitting a second message over the air interface, wherein the second message indicates that the first device is initiating the deployment of the undeployed relay device.

12. The method of claim 11, wherein transmitting the second message comprises:

transmitting the second message as a deployment announcement message, wherein the deployment announcement message includes an identifier of the first device and an identifier of the second device.

13. A method performed by a first device associated with a first host user, the method comprising:

transmitting a first message over an air interface, wherein the first message is to invoke a second device to determine whether the second device should alert a second host user associated with the second device to deploy an undeployed relay device associated with the second host user.

14. The method of claim 13, wherein transmitting the first message comprises:

transmitting the first message as a deployment request message, wherein the deployment request message includes a device identifier of the first device and information regarding a number of candidate mobile devices identified by the first device.

15. The method of claim 13, further comprising:

determining that no relay device signal is receivable by the first device that has a signal quality that is considered adequate to provide reliable communications with a wireless network; and

determining that no undeployed relay device is available to the first host user.

16. The method of claim 13, further comprising:

receiving a second message over the air interface, wherein the second message indicates that the second device is initiating a deployment of the undeployed relay device in response to the first message.

17. The method of claim 16, wherein receiving the second message comprises:

receiving the second message as a deployment announcement message, wherein the deployment announcement message includes an identifier of the first device and an identifier of the second device.

18. An apparatus comprising:

a wireless network interface configured to receive a message from an air interface, wherein the message can indicate a request for a deployment of an undeployed relay device; and

at least one processing subsystem, operatively coupled to the wireless network interface, and configured to make a deployment decision, in response to receiving the message, to initiate the deployment of the undeployed relay device.

19. The apparatus of claim 18, further comprising:

a relay device detection apparatus, operatively coupled to the at least one processing subsystem, and configured to detect a presence of the undeployed relay device in a proximity to the apparatus.

20. The apparatus of claim 18, further comprising:

a battery subsystem, operatively coupled to the at least one processing subsystem, and configured to accept at least one battery.