Communication Terminal Apparatus, Scheduling Method, and Transmission Power Deriving Method

• US 20080076462A1
• Filed: 06/14/2005
• Published: 03/27/2008
• Est. Priority Date: 06/18/2004
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Suzuki, Hidetoshi, Iochi, Hitoshi
• Granted Patent: US 7,620,417 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/44 in connection with interruption of transmission

Abstract

A communication terminal apparatus that can perform an appropriate system operation at the network side and also can avoid a reduction in throughput and a reduction in system efficiency. In this apparatus, a compressed mode calculating part (124) determines, based on compressed information and slot format information, a slot that is a gap in a frame of a compressed mode. A transmission power control part (125) establishes a transmission power obtained by increasing, by &Dgr; Pilot, the transmission power as designated and set by a TPC command for the slots other than the gap in the frame of the compressed mode. A DPCCH transmission power reporting part (127) outputs, to a channel encoding part (128), a report value indicative of the transmission power obtained by removing the effect of &Dgr; Pilot from the transmission power established by the transmission power control part (125).

Claims

1. A communication terminal apparatus comprising:

a transmission power setting section that sets the transmission power of a predetermined channel including a known symbol based on a TPC command for controlling transmission power and information for transmission power setting included in a received signal;

a transmission power reporting section that reports a reported value indicating transmission power of the channel set based on the TPC command out of the transmission power set at said transmission power setting section; and

a transmitting section that transmits a transmission signal based on the transmission power set at said transmission power setting section.

2. The communication terminal apparatus according to claim 1, wherein:

said transmission power setting section sets first transmission power indicated in the TPC command by a communicating party and, for high-power slots positioned before and after a slot in which transmission is temporarily stopped, sets second transmission power which is larger corresponding to transmission power indicated by the information for transmission power setting than the first transmission power; and

said transmission power reporting section reports a reported value indicating the first transmission power in slots other than the high-power slots and transmission power in which an increment of the transmission power indicated by the information for transmission power setting is excluded from the second transmission power set for the high-power slots.

3. The communication terminal apparatus according to claim 2, wherein said transmission power reporting section reports a reported value indicating transmission power not including the transmission power of the slot in which transmission is temporarily stopped.

4. The communication terminal apparatus according to claim 1, wherein:

said transmission power setting section sets the first transmission power indicated in the TPC command by the communicating party for slots of transmitting data at a first transmission rate and sets the second transmission power which is larger corresponding to the transmission power indicated by the information for transmission power setting than the first transmission power for high-power slots of transmitting data at a second transmission rate which is higher than the first transmission rate; and

said transmission power reporting section reports the first transmission power for slots other than the high-power slots and reports a reported value indicating transmission power in which an increment of the transmission power indicated by the information for transmission power setting is excluded from the second transmission power for the high-power slots.

5. The communication terminal apparatus according to claim 1, wherein said transmission power reporting section reports a reported value indicating average transmission power obtained by averaging the transmission power set at said transmission power setting section for a predetermined period of time.

6. A scheduling method comprising the steps of:

setting transmission power of a predetermined channel including a known symbol based on a TPC command and information for transmission power setting included in a received signal;

reporting a reported value indicating transmission power of the channel set based on the TPC command out of set transmission power from a communication terminal apparatus to a base station;

transmitting a transmission signal with the set transmission power from the communication terminal apparatus to the base station;

obtaining at the base station a communication quality for each communication terminal apparatus from the reported value reported from the communication terminal apparatus to the base station and reception power of the predetermined channel including the known symbol received by the base station; and

carrying out scheduling which is processing for allocating transmission based on the communication quality of each communication terminal apparatus.

7. A transmission power deriving method comprising the steps of:

setting transmission power of a predetermined channel including a known symbol based on a TPC command for controlling transmission power and information for transmission power setting included in a received signal; and

obtaining transmission power of the channel set based on the TPC command out of set transmission power.

8. The transmission power deriving method according to claim 7, comprising the steps of:

setting first transmission power indicated in the TPC command by a communicating party;

setting second transmission power which is larger corresponding to transmission power indicated by the information for transmission power setting than the first transmission power for high-power slots positioned before and after a slot in which transmission is temporarily stopped; and

obtaining the first transmission power in slots other than the high-power slots and transmission power in which an increment of the transmission power indicated by the information for transmission power setting is excluded from the second transmission power set for the high-power slots.

9. The transmission power deriving method according to claim 8, comprising the step of obtaining transmission power not including transmission power of the slot in which transmission is temporarily stopped.