USER EQUIPMENT, NETWORK NODE AND METHODS THEREIN FOR DETERMINING A TRANSPORT BLOCK SIZE IN DOWNLINK TRANSMISSIONS IN A TELECOMMUNICATIONS SYSTEM

• US 20150009927A1
• Filed: 06/11/2012
• Published: 01/08/2015
• Est. Priority Date: 02/06/2012
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Larsson, Daniel, Cheng, Jung-Fu, Frenne, Mattias, Furuskog, Johan, Koorapaty, Havish
• Granted Patent: US 10,524,240 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method in a user equipment (121) for determining a transport block size is provided. The transport block size is used by the user equipment (121) in receiving downlink data transmissions from a network node (110) on an enhanced Control CHannel, eCCH. The user equipment (121) and the network node (110) are comprised in a telecommunications system (100). The user equipment (121) has access to a table of predetermined transport block sizes. The user equipment (121) may calculate an indicator N_PRB based on the total number of PRBs allocated to the downlink data transmission N_PRB, and based on an PRB offset value O_PRB or a PRB adjustment factor APRB. Then, the user equipment (121) may determine the transport block size from the table of predetermined transport block sizes based on at least the calculated indicator N_PRB. A user equipment, a method in network node and a network node are also provided.

Claims

1-50. -50. (canceled)

51. A method in a user equipment for determining a transport block size, which transport block size is used by the user equipment in receiving downlink data transmissions from a network node using a frequency multiplexed control channel, eCCH, the user equipment and the network node being comprised in a telecommunications system, which user equipment has access to a table of predetermined transport block sizes for different number of allocated radio resources blocks, PRBs, the method comprising:

calculating an indicator N_PRB based on the total number of PRBs allocated to the downlink data transmission N′

_PRB, and based on an positive PRB offset value O_PRB or a PRB adjustment factor A_PRB larger than one;

determining the transport block size from the table of predetermined transport block sizes based on at least the calculated indicator N_PRB.

52. The method according to claim 51, further comprising:

receiving downlink data transmissions using the determined transport block size.

53. The method according to claim 51, further comprising:

determining a condition, a presence of said condition triggering the calculating of the indicator N_PRB.

54. The method according to claim 53, wherein the condition is receiving communications and/or a communication request on the eCCH.

55. The method according to claim 53, wherein the condition is receiving a communication request from the network node to calculate the transport block size.

56. The method according to claim 51, further comprises:

receiving the positive PRB offset value O_PRB, or the positive PRB adjustment factor A_PRB, before the user equipment starts to receive downlink data transmissions on the eCCH from the network node;

or

receiving the positive PRB offset value O_PRB, or the positive PRB adjustment factor A_PRB, in an RRC message comprised in a downlink transmission from the network node scheduled in a Physical Downlink Control CHannel, PDCCH.

57. The method according to claim 51, wherein the calculating further comprises calculating the indicator N_PRB according to:

N_PRB=min{max{N′

_PRB+O_PRB, 1}, 110}.

58. The method according to claim 51, wherein the calculating further comprises calculating the indicator N_PRB according to:

N_PRB=min{max{└

N′

_PRB×

A_PRB┘

, 1}, 110}.

59. The method according to claim 51, wherein the calculating is performed if N′

_PRB is larger than a physical resource block threshold T_PRB.

60. A user equipment for determining a transport block size, which transport block size is used by the user equipment in receiving downlink data transmissions from a network node using a frequency multiplexed control channel, eCCH, the user equipment and the network node being comprised in a telecommunications system, which user equipment has access to a table of predetermined transport block sizes for different number of allocated radio resources blocks, PRBs, the user equipment comprising:

processing circuitry configured to calculate an indicator N_PRB based on the total number of PRBs allocated to the downlink data transmission N′

_PRB, and based on an positive PRB offset value O_PRB or a PRB adjustment factor A_PRB, and determine the transport block size from the table of predetermined transport block sizes based on at least the calculated indicator N_PRB.

61. The user equipment according to claim 60, further comprising a radio circuitry, wherein the radio circuitry is configured to receive downlink data transmissions using the determined transport block size.

62. The user equipment according to claim 60, wherein the processing circuitry is further configured to determine a condition, a presence of said condition triggering the calculating of the indicator N_PRB.

63. The user equipment according to claim 62, wherein the condition is receiving communications and/or a communication request on the eCCH.

64. The user equipment according to claim 61, wherein the condition is receiving a communication request from the network node to calculate the transport block size.

65. The user equipment according to claim 60, wherein the processing circuitry is further configured to receive the positive PRB offset value O_PRB, or the positive PRB adjustment factor A_PRB, before the user equipment) starts to receive downlink data transmissions on the eCCH from the network node, or receive the positive PRB offset value O_PRB, or the positive PRB adjustment factor A_PRB larger than one, in an RRC message comprised in a downlink transmission from the network node scheduled in a Physical Downlink Control CHannel, PDCCH.

66. The user equipment according to claim 60, wherein the processing circuitry is further configured to calculate the indicator N_PRB according to:

N_PRB=min{max{N′

_PRB+O_PRB, 1}, 110},

67. The user equipment according to claim 60, wherein the processing circuitry is further configured to calculate the indicator N_PRB according to:

N_PRB=min{max{└

N′

_PRB×

A_PRB┘

, 1}, 110}.

68. The user equipment according to claim 60, wherein the processing circuitry is configured to perform the calculations if N′

_PRB is larger than a physical resource block threshold T_PRB.

69. A method in a network node for determining a transport block size, which transport block size is used by the network node in transmitting downlink data transmissions to the user equipment using a frequency multiplexed control channel, eCCH, the network node and the user equipment being comprised in a telecommunications system, which network node has access to a table of predetermined transport block sizes for different number of allocated radio resources blocks, PRBs, the method comprising:

calculating an indicator N_PRB based on the total number of PRBs allocated to the downlink data transmission N′

_PRB, and based on an positive PRB offset value O_PRB, or a PRB adjustment factor A_PRB larger than one;

determining the transport block size from the table of predetermined transport block sizes based on at least the calculated indicator N_PRB.

70. The method according to claim 69, further comprising:

transmitting, to the user equipment, downlink data transmissions using the determined transport block size.

71. The method according to claim 69, further comprising:

transmitting a communication request to the user equipment, which communication request comprises the positive PRB offset value O_PRB, or the positive PRB adjustment factor A_PRB.

72. The method according to claim 69, wherein the calculating further comprises calculating the indicator N_PRB according to:

N_PRB=min{max{N′

_PRB+O_PRB, 1}, 110}.

73. The method according to claim 69, wherein the calculating further comprises calculating the indicator N_PRB according to:

N_PRB=min{max{└

N′

_PRB×

A_PRB┘

, 1},110}.

74. The method according to claim 69, wherein the calculating is performed if N′

_PRB is larger than a physical resource block threshold T_PRB.

75. A network node for determining a transport block size, which transport block size is used by the network node in transmitting downlink data transmissions to the user equipment using a frequency multiplexed control channel, eCCH, the network node and the user equipment being comprised in a telecommunications system, which network node has access to a table of predetermined transport block sizes for different number of allocated radio resources blocks, PRBs, the network node comprising:

processing circuitry configured to calculate an indicator N_PRB based on the total number of PRBs allocated to the downlink data transmission N′

_PRB, and on an positive PRB offset value O_PRB, or a PRB adjustment factor A_PRB larger than one, and to determine the transport block size from the table of predetermined transport block sizes based on at least the calculated indicator N_PRB.

76. The network node according to claim 75, further comprising a radio circuitry, wherein the radio circuitry configured to transmit, to the user equipment, downlink data transmissions using the determined transport block size.

77. The network node according to claim 75, wherein the radio circuitry is further configured to transmit a communication request to the user equipment, which communication request comprises the positive PRB offset value O_PRB, or the positive PRB adjustment factor A_PRB.

78. The network node according to claim 75, wherein the processing circuitry is further configured to calculate the indicator N_PRB according to:

N_PRB=min{max{N′

_PRB+O_PRB, 1}, 110}.

79. The network node according to claim 75, wherein the processing circuitry is further configured to calculate the indicator N_PRB according to:

N_PRB=min{max{└

N′

_PRB×

A_PRB┘

, 1}, 110}.

80. The network node according to claim 75, wherein the processing circuitry is further configured to perform calculations if N′

_PRB is larger than a physical resource block threshold T_PRB.