Terminal apparatus, base station apparatus, and communication method of determining appropriate uplink transmit power of sounding reference signal corresponding to a subframe set

• US 9,832,737 B2
• Filed: 08/02/2012
• Issued: 11/28/2017
• Est. Priority Date: 08/02/2011
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ouchi, Wataru, Imamura, Kimihiko, Akimoto, Yosuke, Nogami, Toshizo, Nakashima, Daiichiro, Shimezawa, Kazuyuki, Suzuki, Shoichi, Kato, Yasuyuki, Uemura, Katsunari
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): Van Roie, Justin T
• Application Number:
  US14/236,560
• Publication Number:
  US 20140169322A1
• Time in Patent Office: 1,944 Days
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The terminal apparatus that communicates with a base station apparatus includes a receiving unit and a transmitting unit. The receiving unit receives a higher layer signal including a first parameter concerning uplink power control, and receives a higher layer signal including a configuration of first and second subframe sets and including a second parameter concerning uplink power control. The transmitting unit sets a transmit power for a sounding reference signal transmitted on a subframe, the transmit power being based on the first parameter, in a case where the first and second subframe sets are configured and the subframe belongs to the first subframe set. The transmitting unit sets a transmit power for a sounding reference signal transmitted on a subframe, the transmit power being based on the second parameter, in a case where the first and second subframe sets are configured and the subframe belongs to the second subframe set.

Claims

1. A terminal apparatus configured to communicate with a base station apparatus, the terminal apparatus comprising:

a receiving circuit configured to receive, via a higher layer;

first parameters concerning uplink power control for a first subframe set,

second parameters concerning uplink power control for a second subframe set,

third parameters concerning uplink power control for a sounding reference signal (SRS),

fourth parameters for configuration of the SRS, and

a fifth parameter for a pathloss reference resource, wherein the fifth parameter specifies a serving cell, the serving cell being a primary cell or a secondary cell; and

a transmitting circuit configured to transmit the SRS, wherein the transmitting circuit is configured to;

set a first pathloss for transmission to the primary cell based on a reference signal from the primary cell, and a second pathloss for transmission to the secondary cell based on a second reference signal from the serving cell specified by the fifth parameter, wherein an index of the second reference signal corresponds to the fifth parameter;

set a first transmit power for the SRS transmitted on a first subframe in the first subframe set, the first transmit power being based on the first parameters, the third parameters, and either one of the first pathloss for transmission to the primary cell and the second pathloss for transmission to the secondary cell, and

set a second transmit power for the SRS transmitted on a second subframe in the second subframe set, the second transmit power being based on the second parameters, the third parameters, and either one of the first pathloss for transmission to the primary cell and the second pathloss for transmission to the secondary cell, the first and the second subframes being SRS subframes configured by the fourth parameters.

2. The terminal apparatus according to claim 1, wherein

the first parameters are a nominal PUSCH power and a user equipment specific PUSCH power for the first subframe set, and

the second parameters are a nominal PUSCH power and a user equipment specific PUSCH power for the second subframe set.

3. A communication method for a terminal apparatus configured to communicate with a base station apparatus, the communication method comprising:

receiving, via a higher layer;

first parameters concerning uplink power control for a first subframe set,

second parameters concerning uplink power control for a second subframe set,

third parameters concerning uplink power control for a sounding referenced signal (SRS),

fourth parameters for configuration of the SRS, and

a fifth parameter for a pathloss reference resource, wherein the fifth parameter specifies a serving cell, the serving cell being a primary cell or a secondary cell;

setting a first pathloss for transmission to the primary cell based on a reference signal from the primary cell, and a second pathloss for transmission to the secondary cell based on a second reference signal from the serving cell specified by the fifth parameter, wherein an index of the second reference signal corresponds to the fifth parameter;

setting a first transmit power for the SRS transmitted on a first subframe in the first subframe set, the first transmit power being based on the first parameters, the third parameters, and either one of the first pathloss for transmission to the primary cell and the second pathloss for transmission to the secondary cell, and

setting a second transmit power for the SRS transmitted on a second subframe in the second subframe set, the second transmit power being based on the second parameters, the third parameters, and either one of the first pathloss for transmission to the primary cell and the second pathloss for transmission to the secondary cell, the first and the second subframes being SRS subframes configured by the fourth parameters.