Method and apparatus for relay facilitated communications

• US 7,400,856 B2
• Filed: 09/03/2003
• Issued: 07/15/2008
• Est. Priority Date: 09/03/2003
• Status: Expired due to Term

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Visotsky, Eugene, Cudak, Mark, Baum, Kevin L., Nangia, Vijay, Classon, Brian K., Sartori, Philippe J.
• Primary Examiner(s): Urban; Edward
• Assistant Examiner(s): Dean; Raymond S.
• Application Number:
  US10/654,227
• Publication Number:
  US 20050048914A1
• Time in Patent Office: 1,777 Days
• Field of Search: 455 7- 111, 455 14- 25, 455504-506, 370/315, 370/316
• US Class Current: 455/7
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• CPC Class Codes: H04W 88/085 Access point devices with remote components
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Communications sourced by a remote unit (14) that is already within reception range of a base site (10) can nevertheless be further facilitated through allocation of one or more relay resources (15, 16). Such relay resources, properly employed, then serve to effectively increase the quality of service for the facilitated communication. This, in turn, can permit the use of, for example, increased data rates for communications from a relatively low power remote unit.

Claims

1. A method comprising:

at a base site;

determining a need to receive a wireless transmission from a transmitter that is presently within wireless communications range of the base site;

automatically determining whether to selectively allocate a wireless relay resource intermediate between the base site and the transmitter to thereby at least attempt to increase a quality of service to support the wireless transmission from the transmitter, wherein the wireless relay resource comprises a demodulation processing relay resource;

providing a grant instruction to the transmitter and the wireless relay resource comprising channel identification information and transmit parameters that are used by the transmitter to transmit and by the wireless relay resource to receive;

providing an instruction to the wireless relay resource to cause the wireless relay resource to relay at least portions of the wireless transmission from the transmitter, wherein the instruction comprises providing at least identifying information regarding the transmitter and wherein knowledge of the wireless relay resource allocation is unnecessary for the transmitter;

combining received portions of relayed transmissions from the wireless relay resource with portions of redundant transmissions from the transmitter to reconstruct the transmission.

21. The method of claim 1 wherein combining received portions of relayed transmissions from the wireless relay resource with portions of transmissions from the transmitter to reconstruct the transmission includes comprising combining received portions of relayed transmissions from at least one wireless relay resource with previously stored portions of transmissions from the transmitter to reconstruct the transmission.

2. A method comprising:

at a base site;

determining a need to receive a wireless transmission from a transmitter that is presently within wireless communications range of the base site;

automatically determining whether to selectively allocate a wireless relay resource intermediate between the base site and the transmitter to thereby at least attempt to increase a quality of service to support the wireless transmission from the transmitter, wherein the wireless relay resource comprises a demodulation processing relay resource;

providing an instruction to the transmitter to convey a wireless transmission to the base site;

providing an instruction to the wireless relay resource to cause the wireless relay resource to relay at least portions of the wireless transmission from the transmitter, wherein the instruction comprises providing at least identifying information regarding the transmitter;

wherein knowledge of the wireless relay resource allocation is unnecessary for the transmitter; and

wherein automatically determining whether to selectively allocate a wireless relay resource includes automatically determining whether to allocate a wireless relay resource that will;

demodulate and decode the transmission from the transmitter to provide decoded information;

determine whether the transmission has been likely correctly received;

when the transmission is determined to have been likely correctly received, re-encode the decoded information to provide re-encoded information and transmit the re-encoded information to the base site; and

not transmit to the base site any relayed transmissions that are determined to not have been likely correctly received.

3. The method of claim 2 wherein determining a need to receive a wireless transmission from a transmitter includes receiving a wireless message from the transmitter that includes an indication of a need to transmit the wireless transmission to the base site.

4. The method of claim 3 wherein receiving a wireless message from the transmitter includes receiving the wireless message, at least in part, via a control channel.

5. The method of claim 2 wherein automatically determining whether to selectively allocate a wireless relay resource to thereby at least attempt to increase a quality of service includes determining that a present wireless communication path between the transmitter and the base site will not likely support a desired effective data rate.

6. The method of claim 5 wherein determining that a present wireless communication path between the transmitter and the base site will not likely support a desired effective data rate includes using information regarding link channel quality for at least one transmission from the base site to the transmitter.

7. The method of claim 2 wherein automatically determining whether to allocate a wireless relay resource to thereby at least attempt to increase a quality of service includes automatically determining whether to allocate a plurality of wireless relay resources to thereby at least attempt to increase the quality of service.

8. The method of claim 7 and further comprising allocating selected ones of the plurality of wireless relay resources to at least attempt to increase the quality of service.

9. The method of claim 8 wherein allocating selected ones of the plurality of wireless relay resources includes allocating some but not all presently available wireless relay resources.

10. The method of claim 2 wherein automatically determining whether to selectively allocate a wireless relay resource to thereby at least attempt to increase a quality of service includes automatically determining whether to allocate a wireless relay resource that utilizes at least one carrier resource that is otherwise also shared by a communication system that includes the base site to effect direct communications between the base site and member communication units.

11. The method of claim 2 wherein automatically determining whether to selectively allocate a wireless relay resource to thereby at least attempt to increase a quality of service includes automatically determining whether to allocate a wireless relay resource that utilizes at least one carrier resource that is not otherwise also shared by a communication system that includes the base site to effect direct communications between the base site and member communication units.

12. The method of claim 2 wherein providing an instruction to the wireless relay resource includes providing the instruction via a control channel.

13. The method of claim 12 wherein providing the instruction via a control channel includes providing the instruction via a control channel that is also used to exchange at least some control information between the base site and the transmitter.

14. The method of claim 2 wherein providing an instruction includes providing at least one of:

a particular transmission parameter to expect when receiving the transmission from the transmitter;

a particular transmission parameter to use when relaying the transmission;

identifying information regarding a particular channel to monitor to receive the transmission from the transmitter;

identifying information regarding a particular channel to utilize when relaying the transmission to the base site.

15. The method of claim 2 and further comprising:

using relayed transmissions from a plurality of relay resources to receive the transmission from the transmitter.

16. The method of claim 15 wherein using relayed transmissions from a plurality of relay resources includes receiving, on a same time-frequency channel, portions of the relayed transmissions from various of the plurality of relay resources to reconstruct the transmission.

17. The method of claim 16 wherein receiving, on a same time-frequency channel, portions of the relayed transmissions from various of the plurality of relay resources to reconstruct the transmission includes decoding received portions of the relayed transmissions from various of the plurality of relay resources to reconstruct the transmission.

22. The method of claim 2 wherein automatically determining whether to allocate a wireless relay resource includes automatically determining whether to allocate a wireless relay resource that comprises a demodulation and decoding processing relay resource.

23. The method of claim 2 and further comprising negotiating a data rate for the transmitter to utilize when transmitting the transmission.

24. The method of claim 2 wherein determining a need to receive a wireless transmission includes determining a need to receive a wireless transmission comprising bearer data and not system control information that corresponds to resource allocation.

25. The method of claim 2 and further comprising allocating a communication resource to the relay resource.

26. The method of claim 25 wherein allocating a communication resource to the relay resource includes providing a relayed transmission temporal directive that is subsequent to a temporal directive as is assigned to the transmitter to support the transmission from the transmitter.

27. The method of claim 26 wherein providing a relayed transmission temporal directive that is subsequent to a temporal directive includes allocating a time slot to support the relayed transmission that is subsequent to a time slot as is assigned to the transmitter for the transmission.

28. The method of claim 2 and further comprising automatically determining whether to allocate a wireless relay resource to thereby at least attempt to increase a quality of service to support a wireless transmission from the base site to the transmitter that is presently within communications range of the base site.

29. The method of claim 28 wherein automatically determining whether to allocate a wireless relay resource to thereby at least attempt to increase a quality of service to support a wireless transmission from the base site to the transmitter that is presently within communications range of the base site includes automatically determining whether to allocate a wireless relay resource to thereby at least attempt to increase a quality of service to support a wireless transmission from the base site to the transmitter that is presently within communications range of the base site but channel conditions for wireless transmissions from the base site to the transmitter are determined to be unacceptable due, at least in part, to channel characteristics.

30. The method of claim 29 wherein the channel characteristics comprise delay spread characteristics.

31. The method of claim 2 and further comprising allocating a wireless relay resource that couples via a wireless link to the base site.

32. The method of claim 2 and further comprising allocating a wireless relay resource that couples via a wireline link to the base site.

38. The method of claim 2 and further comprising, in response to providing the instructions to the transmitter and the wireless relay resource, operating, by the transmitter, independent of the instructions provided to the wireless relay resource.

39. The method of claim 2 and further comprising, in response to providing the instructions to the transmitter and the wireless relay resource, conveying all control information to the transmitter independent of the allocated wireless relay resource.

18. A method comprising:

at a base site;

determining a need to receive a wireless transmission from a transmitter that is presently within wireless communications range of the base site;

automatically determining whether to selectively allocate a wireless relay resource intermediate between the base site and the transmitter to thereby at least attempt to increase a quality of service to support the wireless transmission from the transmitter, wherein the wireless relay resource comprises a demodulation processing relay resource;

providing an instruction to the transmitter to convey a wireless transmission to the base site;

providing an instruction to the wireless relay resource to cause the wireless relay resource to relay at least portions of the wireless transmission from the transmitter, wherein the instruction comprises providing at least identifying information regarding the transmitter;

wherein knowledge of the wireless relay resource allocation is unnecessary for the transmitter; and

at a wireless relay resource;

combining received portions of relayed transmissions from the transmitter using hybrid automatic repeat request to reconstruct the transmission.

19. The method of claim 18 wherein combining received portions of relayed transmissions from the transmitter using hybrid automatic repeat request to reconstruct the transmission includes combining and decoding received portions of relayed transmissions from the transmitter to reconstruct the transmission.

20. The method of claim 18 and further comprising, at the wireless relay resource, relaying a reconstructed transmission to the base site.

33. A communications controller configured to operate at a base site and comprising:

a wireless transmitter and receiver;

a resource allocator that is operably coupled to the wireless transmitter and receiver and that is responsive to a wirelessly transmitted signal from a remote unit that is within wireless reception range of the receiver requesting allocation of a communication resource to facilitate transmission of information to the receiver;

a relay resource activator that is operably coupled to the resource allocator, such that a wireless relay resource intermediate between the base site and the remote unit and having a demodulation processing relay resource can be selectively activated by the communications controller to improve quality of service for a wireless transmission from the remote unit when transmitting within reception range of the receiver and provides an instruction to the relay resource to cause the relay resource to relay at least portion of the wireless transmission from the remote unit, wherein the instruction comprises providing at least identifying information regarding the remote unit;

a means for providing a grant instruction to the remote unit and the wireless relay resource comprising channel identification information and transmit parameters that are used by the remote unit to transmit and by the wireless relay resource to receive, wherein knowledge of the wireless relay resource allocation is unnecessary for the transmitter; and

a means for combining received portions of relayed transmissions from the wireless relay resource with portions of redundant transmissions from the transmitter to reconstruct the transmission.

34. The communications controller of claim 33 wherein the resource allocator includes means for determining when to activate a relay resource to support a requested allocation of resources to facilitate the transmission of information to the receiver.

35. The communications controller of claim 33 wherein the relay resource activator includes means for providing instructions to a given relay resource comprising at least one of:

a particular data transmission rate to expect when receiving the transmission from the remote unit;

a particular data transmission rate to use when relaying the transmission to the receiver;

identifying information regarding a particular channel to monitor to receive the transmission from the remote unit;

identifying information regarding a particular channel to utilize when relaying the transmission to the receiver.

36. The communications controller of claim 33 wherein the relay resource activator includes means for substantially simultaneously activating a plurality of relay resources to improve the quality of service for the wireless transmission from the remote unit.

37. The communications controller of claim 36 and further comprising reception means for receiving relayed transmissions from the plurality of relay resources and for reconstructing the wireless transmission from the remote unit by combining relayed transmissions from at least two of the plurality of relay resources.

40. A wireless communication system comprising:

a wireless relay resource that is configured to combine received portions of relayed transmissions from the transmitter using hybrid automatic repeat request to reconstruct the transmission

a base site comprising;

a resource allocator that is configured to determine a need to receive a wireless transmission from the transmitter, wherein the transmitter is presently within wireless communications range of the base site, and automatically determine whether to selectively allocate the wireless relay resource intermediate between the base site and the transmitter to thereby at least attempt to increase a quality of service to support the wireless transmission from the transmitter, wherein the wireless relay resource comprises a demodulation processing relay resource; and

a relay resource activator that is configured to provide an instruction to the transmitter to convey a wireless transmission to the base site, and provide an instruction to the wireless relay resource to cause the wireless relay resource to relay at least portions of the wireless transmission from the transmitter, wherein the instruction comprises providing at least identifying information regarding the transmitter, and wherein knowledge of the wireless relay resource allocation is unnecessary for the transmitter.