Method and Device for Transmission and Reception of Time-Frequency Resources

• US 20170332376A1
• Filed: 05/29/2015
• Published: 11/16/2017
• Est. Priority Date: 11/24/2014
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: He, Ning, Axns, Johan, Baldemair, Robert, Parkvall, Stefan
• Granted Patent: US 10,448,391 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0001 Arrangements for dividing the transmission path duplexing H04L5/14; multiplexing of different sources on one path H04J
• CPC Class Codes: H04L 5/0028 Variable division signaling therefor H04L5/0092
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04L 5/18 Automatic changing of the traffic direction
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 52/00 Power management, e.g. TPC [Transmission Power Control], power saving or power classes gain control in transmitters or power amplifiers H03G3/3042
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 92/20 between access points

Abstract

A method for performing transmission or reception by a first communication node (511) in at least one of: a first set of time-frequency resources (1201) and a second set of time-frequency resources (1202) in a frame (1200). The first and the second set of time-frequency resources (1201, 1202) are reserved for communication of reference signal and/or control information in a pre-arranged direction of: transmission and reception to or from one or more second communication nodes (512). The first communication node determines (1301) that the direction of communication of at least one of the first and second set is to be switched for at least one frame (1200). The first communication node also performs (1306) transmission or reception of control information in at least one of the first and second set of time-frequency resources (1202) according to the determined switched direction to or from, one or more third communication nodes (513).

Claims

1-30. -30. (canceled)

31. A method, performed by a first communication node, for performing any one of transmission and reception in at least one of:

a first set of time-frequency resources in a frame of time-frequency resources, and a second set of time-frequency resources in the frame, wherein the first and the second set of time-frequency resources in the frame are reserved for communication of reference signal and/or control information in a pre-arranged direction, the direction of communication being one of;

transmission and reception to or from one or more second communication nodes, the first communication node and the one or more second communication nodes operating in a communications network, and the method comprising;

determining that the direction of communication of at least one of the first and second set of time-frequency resources is to be switched, for at least one frame, to a determined switched direction; and

performing one of transmission or reception of control information in the at least one of the first and second set of time-frequency resources of the determined switched direction to or from, one or more third communication nodes operating in the communications network.

32. The method of claim 31, wherein the determined switched direction corresponds to a pattern.

33. The method of claim 31, wherein the determined switched direction is one of:

a pre-agreed direction with the one or more second communication nodes; and

an autonomously determined switched direction.

34. The method of claim 31, wherein the set of time-frequency resources determined to switch communication direction is determined based on one of:

pseudo-random;

prearranged; and

based on a current time.

35. The method of claim 31:

wherein the at least one frame further comprises a third set of time-frequency resources used for transmission or reception of data; and

wherein the method further comprises determining that the second set of time-frequency resources is a subset of time-frequency resources in the third set of time-frequency resources; and

wherein the subset of time-frequency resources is to comprise reference signal and/or control information to be transmitted or received in the same direction as the data in time-frequency resources in the third set of time-frequency resources.

36. The method of claim 35, wherein the performing comprises performing transmission or reception of the reference signal and/or control information in at least one subset of the first set of time-frequency resources and/or the subset of time-frequency resources in the third set of time-frequency resources to or from the one or more third communication nodes.

37. The method of claim 35:

wherein the reference signal and/or control information in the subset of time-frequency resources in the third set of time-frequency resources is modulated using one of;

a) a different modulation scheme than the data in the time-frequency resources in the third set of time-frequency resources; and

b) the same modulation scheme as the control information in the first set of time-frequency resources;

wherein the used modulation scheme is one of;

a multi-carrier modulation scheme;

or

a single-carrier modulation scheme.

38. The method of claim 35, wherein the subset of time-frequency resources in the third set of time-frequency resources corresponds to the first occurring time-frequency resources in the third set of time-frequency resources.

39. The method of claim 35, wherein the second set of the time-frequency resources in the frame corresponds to the last occurring time-frequency resources in the frame.

40. The method of claim 31, wherein the at least one frame further comprises a third set of time-frequency resources used for transmission or reception of data, and wherein the method further comprises:

modulating the reference signal and/or control information in at least one of the first set of time-frequency resources and the second set of time-frequency resources of a first modulation scheme, wherein the first modulation scheme is capable of simultaneous transmissions of multiple independent signals;

modulating the data in the third set of time-frequency resources of a second modulation scheme, wherein the second modulation scheme is a different modulation scheme than the first modulation scheme; and

transmitting a) the modulated reference signal and/or control information in the one of the first set of time-frequency resources and the second set of time-frequency resources the direction of communication of which is not to be switched, and b) the modulated data in the third set of time-frequency resources to at least one second communication node of the one or more second communication nodes;

wherein the performing one of transmission or reception of control information comprises transmission of the modulated reference signal and/or control information in the at least one first set of time-frequency resources and the second set of time-frequency resources to the one or more third communication nodes operating in the communications network.

41. The method of claim 40, wherein the modulating the reference signal and/or control information in at least one of the first set of time-frequency resources and the second set of time-frequency resources of the first modulation scheme comprises

determining a transmission power for the third set of time-frequency resources;

determining a transmission power for the at least one of the first set of time-frequency resources and the second set of time-frequency resources;

comparing the determined transmission power for the at least one of the first set of time-frequency resources and the second set of time-frequency resources, and the determined transmission power for the third set of time-frequency resources,

determining the first modulation scheme based on the outcome of the comparison of the comparing.

42. The method of claim 41, wherein the modulating the reference signal and/or control information in at least one of the first set of time-frequency resources and the second set of time-frequency resources of the first modulation scheme comprises adjusting the transmission power for the at least one first set of time-frequency resources and the second set of time-frequency resources below a determined threshold in order to reduce power saturation.

43. The method of claim 40, wherein the modulating comprises providing a more robust channel coding in the first modulation scheme than provided in the second modulation scheme.

44. The method of claim 31, wherein the first communication node is a wireless device or a network node in the wireless communication network.

45. A non-transitory computer readable recording medium storing a computer program product for performing, by a first communication node, any one of transmission and reception in at least one of:

a first set of time-frequency resources in a frame of time-frequency resources, and a second set of time-frequency resources in the frame, wherein the first and the second set of time-frequency resources in the frame are reserved for communication of reference signal and/or control information in a pre-arranged direction, the direction of communication being one of;

transmission and reception to or from one or more second communication nodes, the first communication node and the one or more second communication nodes operating in a communications network, the computer program product comprising software instructions which, when run on processing circuitry of the network first communication node, causes the first communication node to;

determine that the direction of communication of at least one of the first and second set of time-frequency resources is to be switched, for at least one frame, to a determined switched direction; and

perform one of transmission or reception of control information in the at least one of the first and second set of time-frequency resources of the determined switched direction to or from, one or more third communication nodes operating in the communications network.

46. A first communication node configured to perform any one of transmission and reception in at least one of:

a first set of time-frequency resources in a frame of time-frequency resources, and a second set of time-frequency resources in the frame, wherein the first and the second set of time-frequency resources in the frame are reserved for communication of reference signal and/or control information in a pre-arranged direction, the direction of communication being one of;

transmission and reception to or from one or more second communication nodes, the first communication node and the one or more second communication nodes being configured to operate in a communications network, and the first communication node comprising;

processing circuitry;

memory containing instructions executable by the processing circuitry whereby the first communication node is operative to;

determine that the direction of communication of at least one of the first and second set of time-frequency resources is to be switched for at least one frame to a determined switched direction, and

perform one of transmission or reception of control information in the at least one of the first and second set of time-frequency resources of the determined switched direction to or from, one or more third communication nodes configured to operate in the communications network.

47. The first communication node of claim 46, wherein the determined switched direction corresponds to a pattern.

48. The first communication node of claim 46, wherein the determined switched direction is one of:

a pre-agreed direction with the one or more second communication nodes, and an autonomously determined switched direction.

49. The first communication node of claim 46, wherein the instructions are such that the first communication node is operative to determine the set of time-frequency resources to switch communication direction based on one of:

pseudo-random, prearranged, and a current time.

50. The first communication node of claim 46:

wherein the at least one frame further comprises a third set of time-frequency resources used for transmission or reception of data; and

wherein the instructions are such that the first communication node is operative to determine that the second set of time-frequency resources is a subset of time-frequency resources in the third set of time-frequency resources; and

wherein the subset of time-frequency resources is to comprise reference signal and/or control information to be transmitted or received in the same direction as the data in time-frequency resources in the third set of time-frequency resources.

51. The first communication node of claim 50, wherein the instructions are such that the first communication node is operative to perform the one of transmission or reception of the control information by performing transmission or reception of the reference signal and/or control information in at least one subset of the first set of time-frequency resources and/or the subset of time-frequency resources in the third set of time-frequency resources to or from the one or more third communication nodes.

52. The first communication node of claim 50:

wherein the reference signal and/or control information in the subset of time-frequency resources in the third set of time-frequency resources is configured to be modulated using one of;

a) a different modulation scheme than the data in the time-frequency resources in the third set of time-frequency resources; and

b) the same modulation scheme as the control information in the first set of time-frequency resources;

wherein the used modulation scheme is one of;

a multi-carrier modulation scheme, or

a single-carrier modulation scheme.

53. The first communication node of claim 50, wherein the subset of time-frequency resources in the third set of time-frequency resources corresponds to the first occurring time-frequency resources in the third set of time-frequency resources.

54. The first communication node of claim 50, wherein the second set of the time-frequency resources in the frame corresponds to the last occurring time-frequency resources in the frame.

55. The first communication node of claim 46:

wherein the at least one frame further comprises a third set of time-frequency resources used for transmission or reception of data; and

wherein the instructions are such that the first communication node is operative to;

modulate the reference signal and/or control information in at least one of the first set of time-frequency resources and the second set of time-frequency resources of a first modulation scheme, wherein the first modulation scheme is capable of simultaneous transmissions of multiple independent signals;

modulate the data in the third set of time-frequency resources of a second modulation scheme, wherein the second modulation scheme is a different modulation scheme than the first modulation scheme; and

transmit a) the modulated reference signal and/or control information in the one of the first set of time-frequency resources and the second set of time-frequency resources the direction of communication of which is not to be switched, and b) the modulated data in the third set of time-frequency resources to at least one second communication node of the one or more second communication nodes;

wherein to perform one of transmission or reception of control information comprises transmission of the modulated reference signal and/or control information in the at least one first set of time-frequency resources and the second set of time-frequency resources to the one or more third communication nodes configured to operate in the communications network.

56. The first communication node of claim 55, wherein to modulate the reference signal and/or control information in at least one of the first set of time-frequency resources and the second set of time-frequency resources of the first modulation scheme comprises:

determining a transmission power for the third set of time-frequency resources;

determining a transmission power for the at least one of the first set of time-frequency resources and the second set of time-frequency resources;

comparing the determined transmission power for the at least one of the first set of time-frequency resources and the second set of time-frequency resources, and the determined transmission power for the third set of time-frequency resources;

determining the first modulation scheme based on the outcome of the comparison.

57. The first communication node of claim 56, wherein to modulate the reference signal and/or control information in at least one of the first set of time-frequency resources and the second set of time-frequency resources of the first modulation scheme comprises adjusting the transmission power for the at least one first set of time-frequency resources and the second set of time-frequency resources below a determined threshold in order to reduce power saturation.

58. The first communication node of claim 55, wherein to modulate comprises to provide a more robust channel coding in the first modulation scheme than provided in the second modulation scheme.

59. The first communication node of claim 46, wherein the first communication node is a wireless device or a network node in the wireless communication network.