Base Station Aided Mobile-Relay Candidate Pre-Selection and Pre-Deployment

• US 20120315841A1
• Filed: 02/26/2010
• Published: 12/13/2012
• Est. Priority Date: 02/26/2010
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Zhou, Bin, Xu, Jing, Wang, Haifeng, Li, Zhenhong
• Granted Patent: US 8,938,197 B2
• Time in Patent Office: Days
• US Class Current: 455/11.1
• 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: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

In one exemplary embodiment a network node (such as a base station BS) determines that a plurality of user equipments UEs are available for use as mobile relays MRs, and selects a subset of the plurality of UEs and configures the subset of the plurality of UEs as MRs. In another exemplary embodiment, an indication is sent (for example from a UE) that a UE is willing to operate as a MR, a response is received that the UE is selected to be a MR1 and then periodically there is sent a beacon advertising that the UE is a MR. In this manner UEs are pre-configured in a cell as MRs, regardless of any specific UE need for relay services. Any UE later needing relay service listens for the beacon. The BS can limit which UEs it pre-configures as MRs to avoid closely spaced UEs being both active MRs. Locations need not be signaled.

Claims

1-35. -35. (canceled)

36. A method, comprising:

determining that a plurality of user equipments are available for use as mobile relays; and

selecting a subset of the plurality of user equipments and configuring the subset of the plurality of user equipments as mobile relays.

37. The method according to claim 36, in which the selecting is independent of any relay user equipment needing or requesting relay service.

38. An apparatus comprising:

at least one processor; and

at least one memory storing a program of computer executable instructions;

in which the at least one processor is configured with the at least one memory and the computer executable instructions to cause the apparatus to perform actions comprising;

determine that a plurality of user equipments are available for use as mobile relays; and

select a subset of the plurality of user equipments and configure the subset of the plurality of user equipments as mobile relays.

39. The apparatus according to claim 38, in which the selecting is independent of any relay user equipment needing or requesting relay service.

40. The apparatus according to claim 38, in which the subset of the plurality of user equipments are selected such that each user equipment of the subset is spaced a distance from every other user equipments within the subset.

41. The apparatus according to claim 38, in which the distance from every other user equipments within the subset is implied from channel quality indications received from at least some of the user equipments within the subset

42. The apparatus according to claim 38, in which determining that the plurality of user equipments are available for use as mobile relays comprises receiving from each of the plurality of user equipments an indication that the user equipment is willing to operate as a mobile relay.

43. The apparatus according to claim 42, in which the indication is received from each of the plurality of user equipments in the absence of a message requesting the indication.

44. The apparatus according to claim 42, in which configuring the subset of the plurality user equipments as mobile relays comprises sending to each respective user equipment from which an indication was received a respective reply to the received indication, each respective reply comprising at least one of:

an indication that the respective user equipment is selected to be a mobile relay;

a request for additional information; and

an indication that the respective user equipment is not selected to be a mobile relay.

45. The apparatus according to claim 42, in which each user equipment from which is received the indication indicating willingness to operate as a mobile relay is a volunteer mobile relay candidate;

in which the plurality of user equipments consist of all volunteer mobile relay candidates in a cell;

and the subset of the plurality of user equipments consist of all user equipments that are active mobile relays in the cell.

46. The apparatus according to claim 45, in which the volunteer mobile relay candidates comprise backup mobile relays and active mobile relays and volunteer mobile relay candidates which have been rejected for use as an active mobile relay in the cell.

47. A computer readable memory storing a program of computer instructions that when executed by a processor result in actions comprising:

code for determining that a plurality of user equipments are available for use as mobile relays; and

code for selecting a subset of the plurality of user equipments and configuring the subset of the plurality of user equipments as mobile relays.

48. A method, comprising:

sending an indication that a user equipment is willing to operate as a mobile relay;

receiving a response that the user equipment is selected to be a mobile relay; and

periodically sending a beacon advertising that the user equipment is a mobile relay.

49. The method according to claim 48, in which the beacon is periodically sent independently of any relay user equipment needing or requesting relay service.

50. An apparatus comprising:

at least one processor; and

at least one memory storing a program of computer executable instructions;

in which the at least one processor is configured with the at least one memory and the computer executable instructions to cause the apparatus to perform actions comprising;

send an indication that a user equipment is willing to operate as a mobile relay;

receive a response that the user equipment is selected to be a mobile relay; and

periodically send a beacon advertising that the user equipment is a mobile relay.

51. The apparatus according to claim 50, in which the beacon is periodically sent independently of any relay user equipment needing or requesting relay service.

52. The apparatus according to claim 51, in which the indication is sent in the absence of any received message requesting the indication.

53. The apparatus according to claim 50, in which the at least one processor is configured with the at least one memory and the computer executable instructions to cause the apparatus to perform actions further comprising:

receive a response to the indication requesting that the user equipment measure a channel with other mobile relays; and

measure a channel with other mobile relays and reporting channel measurement results to a base station;

in which the response that the user equipment is selected to be a mobile relay is received in response to reporting the channel measurement results.

54. The apparatus according to claim 50, in which the indication is one bit and the response is two bits.

55. A computer readable memory storing a program of computer instructions that when executed by a processor result in actions comprising:

code for sending an indication that a user equipment is willing to operate as a mobile relay;

code for receiving a response that the user equipment is selected to be a mobile relay; and

code for periodically sending a beacon advertising that the user equipment is a mobile relay.