TRANSMISSION DEVICE, TRANSMISSION POWER CONTROL METHOD AND TRANSMISSION DETERMINATION METHOD

• US 20130028214A1
• Filed: 04/01/2011
• Published: 01/31/2013
• Est. Priority Date: 04/05/2010
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Imamura, Daichi, Nishio, Akihiko, Nakao, Seigo, Iwai, Takashi
• Granted Patent: US 8,855,131 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• 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 28/065 using assembly or disassembly of packets
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/221 using past power control commands
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/00 Local resource management

Abstract

Provided is a transmission device, wherein even when the transmission device performs noncontiguous band allocation transmission, the same level of coverage and gain as when the contiguous band allocation transmission is assumed can be maintained. A transmission power control unit (110), in a second mode, calculates first power on the basis of the transmission power control method using, as the bandwidth of the contiguous bands in the first mode, the bandwidth of a first band with the lowest frequency in a cluster allocated to the lowest band among a plurality of clusters and the highest frequency in a cluster allocated to the highest band among the plurality of clusters as both ends thereof, and calculates the transmission power using the ratio between the bandwidth of the first band and the bandwidth of a second band to which the plurality of the clusters are allocated, and the first power.

Claims

1-10. -10. (canceled)

11. A transmission apparatus that uses a first mode for allocating transmission data to a contiguous frequency band and a second mode for dividing the transmission data into a plurality of clusters and allocating the plurality of clusters to non-contiguous frequency bands, the apparatus comprising:

a control section configured to control a transmission power of the transmission data in accordance with the first mode or the second mode; and

a transmission section configured to transmit the transmission data at the transmission power, wherein

in the first mode, the control section sets the transmission power based on a transmission power control method set for the contiguous frequency band and,

in the second mode,

the control section sets a bandwidth of a first frequency band, which is derived from a lowest frequency in a cluster allocated to a lowest frequency band among the plurality of clusters and a highest frequency in a cluster allocated to a highest frequency band among the plurality of clusters, as a bandwidth of the contiguous frequency band in the first mode, and calculates a first power based on the set bandwidth of the contiguous frequency band and the transmission power control method, and

the control section calculates the transmission power, using the first power and a ratio between the bandwidth of the first frequency band and a bandwidth of a second frequency band that includes the non-contiguous frequency bands to which the plurality of clusters are allocated.

12. The transmission apparatus according to claim 11, wherein, in the second mode, the bandwidth of the first frequency band is set the bandwidth of the first frequency band ranging from the lowest frequency in the cluster allocated to the lowest frequency band among the plurality of clusters to the highest frequency in the cluster allocated to the highest frequency band among the plurality of clusters, as the bandwidth of the contiguous frequency band in the first mode.

13. The transmission apparatus according to claim 11, wherein

the transmission data is data on physical uplink shared channel (PUSCH),

in the first mode, the control section sets the transmission power P_PUSCH (i) represented in equation 3 based on the transmission power control method represented in equations 1 and 2, and,

in the second mode,

the control section sets the bandwidth M_c(i) of the first frequency band represented in equation 4, as the bandwidth of the contiguous frequency band in the first mode, and calculates the first power P′

_c(i) based on the transmission power control method represented in equations 1 and 2, and

the control section calculates the transmission power P_PUSCH(i) represented in equation 5, using the first power P′

_c(i) and the ratio between the bandwidth M_c(i) of the first frequency band and the bandwidth M_PUSCH(i) of the second frequency band,

P_C(i)=10 log₁₀(M_C(i))+P<sub>O—

PUSCH</sub>(j)+α

(j)·

PL+Δ

_TF(i)+f(i)[dBm] 

 

(1)

where i represents a subframe index, P<sub>O—

PUSCH</sub>(j) represents a reception target power, PL represents a propagation loss value measured by the transmission apparatus, α

(j) represents a coefficient by which the propagation loss value PL is multiplied, Δ

_TF (i) represents an offset value corresponding to a modulation scheme, and f(i) represents a cumulative value of control values of closed-Transmission Power Control (TPC),

P′

_C(i)=min{P_CMAX,P_C(i)}[dBm] 

 

(2)

where P_CMAX represents a maximum transmission power value set according to the transmission power control method,

P_PUSCH(i)=P′

_C(i)[dBm] 

 

(3)

M_C(i)=(f_high−

f_low)/B_RB[RB] 

 

(4)

where f_low represents the lowest frequency in the cluster allocated to the lowest frequency band among the plurality of clusters, f_high represents the highest frequency in the cluster allocated to the highest frequency band among the plurality of clusters, and B_RB represents a frequency bandwidth per resource block,

14. The transmission apparatus according to claim 11, wherein

the transmission data is data on physical uplink shared channel (PUSCH),

in the first mode, the control section sets the transmission power P_PUSCH (i) represented in equation 3 based on the transmission power control method represented in equations 1 and 2, and

in the second mode,

the control section sets the bandwidth M_c(i) of the first frequency band represented in equation 4, as the bandwidth of the contiguous frequency band in the first mode, and calculates the first power P′

_c(i) based on the transmission power control method represented in equations 1 and 2, and

the control section calculates the transmission power P_PUSCH (i) represented in equation 5, using the first power P′

_c(i) and the ratio between the bandwidth M_c(i) of the first frequency band and the bandwidth M_PUSCH(i) of the second frequency band,

P_C(i)=10 log₁₀(M_C(i))+P<sub>O—

PUSCH</sub>(j)+α

(j)·

PL+Δ

_TF(i)+f(i)[dBm] 

 

(1)

where i represents a subframe index, P<sub>O—

PUSCH</sub>(j) represents a reception target power, PL represents a propagation loss value measured by the transmission apparatus, α

(j) represents a coefficient by which the propagation loss value PL is multiplied, Δ

_TF (i) represents an offset value corresponding to a modulation scheme, and f(i) represents a cumulative value of control values of closed-Transmission Power Control (TPC),

P′

_C(i)=min{P_CMAX,P_C(i)}[dBm] 

 

(2)

where P_CMAX represents the maximum transmission power value set according to the transmission power control method,

P_PUSCH(i)=P′

_C(i)[dBm] 

 

(3)

M_C(i)=n_high^RB−

n_low^RB+1[RB] 

 

(4)

where n_low^RB represents a resource block index of a resource block corresponding to the lowest frequency in the cluster allocated to the lowest frequency band among the plurality of clusters, and n_high^RB represents a resource block index of a resource block corresponding to the highest frequency in the cluster allocated to the highest frequency band among the plurality of clusters,

15. A transmission apparatus that independently controls a transmission power of first transmission data and a transmission power of second transmission data, the apparatus comprising:

a determination section configured to compare a determination parameter with a determination reference and to determine whether to simultaneously transmit the first transmission data and the second transmission data or transmit only any one of the first transmission data and the second transmission data; and

a transmission section configured to transmit the first transmission data and the second transmission data based on a determination result of the determination section, wherein

the determination parameter is a power value calculated by multiplying a first parameter by a second parameter, the first parameter being a higher transmission power per frequency between a first transmission power spectral density that is a transmission power of the first transmission data per frequency and a second transmission power spectral density that is a transmission power of the second transmission data per frequency, and the second parameter being a bandwidth of a frequency band ranging from a lowest frequency in the transmission data allocated to a lowest frequency band in the first transmission data and the second transmission data to a highest frequency in the transmission data allocated to a highest frequency band in the first transmission data and the second transmission data.

16. The transmission apparatus according to claim 15, wherein, when the determination parameter is equal to or smaller than the determination reference, the determination section determines to simultaneously transmit the first transmission data and the second transmission data, and when the determination parameter is larger than the determination reference, the determination section determines to transmit only any one of the first transmission data and the second transmission data.

17. The transmission apparatus according to claim 15, wherein, in a case where the first transmission data or the second transmission data is performed frequency-hopping between a plurality of slots in one subframe, the determination parameter is the power value calculated using a widest bandwidth among a plurality of bandwidths calculated for each of the plurality of slots in the one subframe.

18. The transmission apparatus according to claim 15,

wherein the first transmission data is data on physical uplink shared channel (PUSCH), and the second transmission data is data on physical uplink control channel (PUCCH), and

the determination parameter P_C(i) represented in equation 1 is the power value calculated by multiplying the first parameter by the second parameter, the first parameter being the higher transmission power per frequency between the first transmission power spectral density represented in equation 2 and the second transmission power spectral density represented in equation 3, and as represented in equation 4, the second parameter being the bandwidth M_C(i) of the frequency band ranging from the lowest frequency f_low in the transmission data allocated to the lowest frequency band in the first transmission data and the second transmission data to the highest frequency f_high in the transmission data allocated to the highest frequency band in the first transmission data and the second transmission data,

P_C(i)=10 log₁₀(M_C(i))+max{P_PUSCH—

_1RB(i),P<sub>PUCCH—

1RB</sub>(i)} 

 

(1)

where i represents a subframe index,

P<sub>PUSCH—

1RB</sub>(i)=P<sub>O—

PUSCH</sub>+α

·

PL+Δ

_TF(i)+f(i) 

 

(2)

where P<sub>O—

PUSCH</sub> represents a reception target power of the first transmission data, PL represents a propagation loss value measured by the transmission apparatus, α

represents a coefficient by which the propagation loss value PL is multiplied, Δ

_TF (i) represents an offset value corresponding to a modulation scheme, and f(i) represents a cumulative value of control values of closed-Transmission Power Control (TPC) for the first transmission data,

P<sub>PUCCH—

1RB</sub>(i)=P<sub>O—

PUCCH</sub>+PL+h+Δ

_F(i)+g(i) 

 

(3)

where P<sub>O—

PUCCH</sub> represents a reception target power of the second transmission data, h and Δ

_F represent offset values corresponding to a transmission format of the second transmission data, and g(i) represents a cumulative value of control values of closed-Transmission Power Control (TPC) for the second transmission data,

M_C(i)=(f_high−

f_low)/B_RB[RB] 

 

(4)

where B_RB represents a frequency bandwidth per resource block.

19. The transmission apparatus according to claim 15, wherein

the first transmission data is data on physical uplink shared channel (PUSCH) and the second transmission data is data on physical uplink control channel (PUCCH), and

the determination parameter P_C(i) represented in equation 1 is a power value calculated by multiplying the first parameter by the second parameter, the first parameter being the higher transmission power per frequency between the first transmission power spectral density represented in equation 2 and the second transmission power spectral density represented in equation 3, and as represented in equation 4, the second parameter being the bandwidth M_C(i) of a frequency band ranging from a resource block having a resource block index n_low^RB corresponding to the lowest frequency in the transmission data allocated to the lowest frequency band in the first transmission data and the second transmission data to a resource block having a resource block index n_high^RB corresponding to the highest frequency in the transmission data allocated to the highest frequency band in the first transmission data and the second transmission data,

P_C(i)=10 log₁₀(M_C(i))+max{P_PUSCH—

_1RB(i),P<sub>PUCCH—

1RB</sub>(i)} 

 

(1)

where i represents a subframe index,

P<sub>PUSCH—

1RB</sub>(i)=P<sub>O—

PUSCH</sub>+α

·

PL+Δ

_TF(i)+f(i) 

 

(2)

where P<sub>O—

PUSCH</sub> represents a reception target power of the first transmission data, PL represents a propagation loss value measured by the transmission apparatus, α

represents a coefficient by which the propagation loss value PL is multiplied, Δ

_TF (i) represents an offset value corresponding to a modulation scheme, and f(i) represents a cumulative value of control values of closed-Transmission Power Control (TPC) for the first transmission data,

P<sub>PUCCH—

1RB</sub>(i)=P<sub>O—

PUCCH</sub>+PL+h+Δ

_F(i)+g(i) 

 

(3)

where P<sub>O—

PUCCH</sub> represents a reception target power of the second transmission data, h and Δ

_F represent offset values corresponding to a transmission format of the second transmission data, and g(i) represents a cumulative value of control values of closed-Transmission Power Control (TPC) for the second transmission data,

M_C(i)=n_high^RB−

n_low^RB+1[RB] 

 

(4)

20. A transmission power control method in a transmission apparatus using a first mode for allocating transmission data to a contiguous frequency band and a second mode for dividing the transmission data into a plurality of clusters and allocating the plurality of clusters to non-contiguous frequency bands, the method comprising:

controlling a transmission power of the transmission data in accordance with the first mode or the second mode;

transmitting the transmission data at the controlled transmission power;

in the first mode, setting the transmission power based on a transmission power control method set for the contiguous frequency band;

in the second mode,

setting a bandwidth of a first frequency band, which is derived from a lowest frequency in a cluster allocated to a lowest frequency band among the plurality of clusters and a highest frequency in a cluster allocated to a highest frequency band among the plurality of clusters, as a bandwidth of the contiguous frequency band in the first mode,

calculating a first power based on the set bandwidth of the contiguous frequency band and the transmission power control method; and

calculating the transmission power, using the first power and a ratio between the bandwidth of the first frequency band and a bandwidth of a second frequency band that includes the non-contiguous frequency bands to which the plurality of clusters are allocated.

21. A transmission determination method in a transmission apparatus for independently controlling a transmission power of first transmission data and a transmission power of second transmission data, the method comprising:

comparing a determination parameter with a determination reference;

determining whether to simultaneously transmit the first transmission data and the second transmission data or transmit only any one of the first transmission data and the second transmission data; and

transmitting the first transmission data and the second transmission data based on a result of the determining, wherein

the determination parameter is a power value calculated by multiplying a first parameter by a second parameter, the first parameter being a higher transmission power per frequency between a transmission power of the first transmission data per frequency and a transmission power of the second transmission data per frequency, and the second parameter being a bandwidth of a frequency band ranging from a lowest frequency in the transmission data allocated to a lowest frequency band in the first transmission data and the second transmission data to a highest frequency in the transmission data allocated to a highest frequency band in the first transmission data and the second transmission data.