Sub Channel Generation for a Wireless Mesh Network

• US 20110228742A1
• Filed: 06/15/2009
• Published: 09/22/2011
• Est. Priority Date: 06/13/2008
• Status: Abandoned Application

• Current Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Original Assignee: Nokia Solutions and Networks US LLC (Nokia Corporation)
• Inventors: Zhao, Zhu Yan, Honkasalo, Zhi-Chun
• Application Number:
  US12/997,691
• Publication Number:
  US 20110228742A1
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0067 Allocation algorithms which involve graph matching
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

In accordance with an example embodiment of the present invention, there is at least a method, apparatus, and computer program for dividing an available bandwidth into a plurality of frequency bands or channels, dividing each of the plurality of frequency bands or channels into a plurality of orthogonal sub-carriers, organizing the sub-carriers into a plurality of sub-channels, and assigning at least some of the generated sub-channels to at least one corresponding radio link between parent and child nodes of a mesh network.

Claims

1-36. -36. (canceled)

37. A method, comprising:

dividing an available bandwidth into a plurality of frequency bands or channels;

dividing each of the plurality of frequency bands or channels into a plurality of orthogonal sub-carriers;

organizing the sub-carriers into a plurality of sub-channels; and

assigning at least one of the sub-channels to at least one corresponding radio link between parent and child nodes of a mesh network.

38. The method according to claim 37, where each of the sub-channels contain one of a same number of sub-carriers and a different number of sub-carriers and where the sub-carriers are organized into the plurality of sub-channels in one of a sequence order, a random order, and a pseudorandom order.

39. The method according to claim 37, where the parent and child nodes perform transmitting and receiving in a same time slot, and comprising assigning the sub-channels from different frequency bands for use in each of the at least one corresponding radio link, where the assigned sub-channels include a sufficient guard band for duplex operation.

40. The method according to claim 37, where a given node transmits and receives as both the parent node and the child node using different ones of the sub-channels and where a same sub-channel is assigned to both the parent node and the child node for use in a same time slot.

41. The method according to claim 37, where assigning comprises:

assigning a first generated sub-channel to a radio link between a root node and a first hop node; and

subsequently

assigning a second generated sub-channel to a radio link between the first hop node and a second hop node, where the assigned generated sub-channels are used by the first hop node to transmit a signal to the second hop node in a first time slot, and to receive a signal from the second hop node in a second time slot.

42. The method according to claim 37, comprising assigning more than one of the sub-channels to at least one radio link between a first hop node and at least one other node, where the first hop node comprises more than one transceiver, where each transceiver of the more than one transceivers of the first hop node can use at least one of the sub-channels to one of transmit to or receive from the at least one other node in a particular time slot and where the more than one transceiver comprises at least one transceiver assigned to be a receiver and at least one transceiver assigned to be a transmitter, and where sub-channels assigned to the receiver are different than sub-channels assigned to the transmitter.

43. A memory embodying a computer program executable by a processor to perform the method of claim 37.

44. The method according to claim 37 for an in-band backhauling or relaying communication in the mesh network, comprising:

assigning a first generated sub-channel to the an access node in the mesh network; and

assigning a second generated sub-channel to a backhauling node in the mesh network.

45. The method according to claim 44, where the assigned first and second generated sub-channels share a same radio resource and where the in-band backhauling or relaying communication includes a first and second time slot, comprising:

transmitting, by one of the backhauling or the access node, a signal to the other node in the first time slot with the same radio resource; and

subsequently, receiving from the other node, a signal in the second time slot with the same radio resource.

46. The method according to claim 44, where the in-band backhauling or relaying communication includes a first time slot and where the access node is operating in a time division duplex mode, comprising:

dividing the first time slot into a first part and a second part; and

transmitting, by the access node, on an uplink in the first part and on a downlink in the second part of the first time slot.

47. The method according to claim 44, where the access node is operating in a time division duplex mode and where the assigned first and second generated sub-channels are each generated from different frequency bands of the plurality of frequency bands, comprising:

transmitting, by one of the access node or the backhauling node, on an uplink using the first generated sub-channel; and

transmitting, by one of the access node or the backhauling node, on a downlink using the second generated sub-channel.

48. An apparatus, comprising:

a processor configured to divide an available bandwidth into a plurality of frequency bands or channels;

the processor configured to divide each of the plurality of frequency bands or channels into a plurality of orthogonal sub-carriers;

the processor configured to organize the sub-carriers into a plurality of sub-channels; and

the processor configured to assign at least one of the sub-channels to at least one corresponding radio link between parent and child nodes of a mesh network.

49. The apparatus according to claim 48, where each sub-channel contains one of a same number of sub-carriers and a different number of sub-carriers and where the sub-carriers are organized into the plurality of sub-channels in one of a sequence order, a random order, and a pseudorandom order.

50. The apparatus according to claim 48, where the parent and child nodes perform transmitting and receiving in a same time slot, and comprising the processor is configured to assign sub-channels from different frequency bands to each of the at least one corresponding radio link, where the assigned sub-channels include a sufficient guard band for duplex operation.

51. The apparatus according to claim 48, where a given node is configured to transmit and receive as both the parent node and the child node using different ones of the sub-channels and where the processor is configured to assign a same sub-channel to both the parent node and the child node for use in a same time slot.

52. The apparatus according to claim 48, where assigning comprises:

the processor is configured to assign a first generated sub-channel to a radio link between a root node and a first hop node; and

the processor is configured to assign a second generated sub-channel to a radio link between the first hop node and a second hop node, where the assigned generated sub-channels are used by the first hop node to transmit a signal to the second hop node in a first time slot, and to receive a signal from the second hop node in a second time slot.

53. The apparatus according to claim 48, comprising the processor is configured to assign more than one of the sub-channels to at least one radio link between a first hop node and at least one other node, where the first hop node comprises more than one transceiver, where each transceiver of the more than one transceivers of the first hop node can use at least one of the sub-channels to one of transmit to or receive from the at least one other node in a particular time slot and where the more than one transceiver comprises at least one transceiver assigned to be a receiver and at least one transceiver assigned to be a transmitter, and where sub-channels assigned to the receiver are different than sub-channels assigned to the transmitter.

54. The apparatus according to claim 48, for a case of an in-band backhauling or relaying communication in the mesh network, further comprising:

the processor is configured to assign a first generated sub-channel to the an access node in the mesh network; and

the processor is configured to assign a second generated sub-channel to a backhauling node in the mesh network.

55. The apparatus according to claim 54, where the in-band backhauling or relaying communication includes a first time slot and where the access node is operating in a time division duplex mode, comprising:

the processor configured to divide the first time slot into a first part and a second part; and

assigning the first part to be used by the access node in an uplink transmission and the second part to be used by the access node in a downlink transmission.

56. The apparatus according to claim 54, where the access node is operating in a time division duplex mode and where the assigned first and second generated sub-channels are each generated from different frequency bands of the plurality of frequency bands, comprising:

transmitting, by one of the access node or the backhauling node, on an uplink using the first generated sub-channel; and

transmitting, by one of the access node or the backhauling node, on a downlink using the second generated sub-channel.