COMMUNICATION CONTROL APPARATUS AND COMMUNICATION CONTROL METHOD

• US 20090073927A1
• Filed: 04/25/2006
• Published: 03/19/2009
• Est. Priority Date: 04/27/2005
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Umesh, Anil, Ishii, Hiroyuki, Nakamura, Takehiro, Usuda, Masafumi
• Granted Patent: US 7,974,231 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04W 52/12 Outer and inner loops
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]

Abstract

A communication control apparatus (30, 10) used in a mobile communication system includes: means (32, 12) that derives a second target communication quality Q2 for TFs other than a reference format from a first target communication quality for the reference format in a plurality of TFs provide for communicating with an upper layer of a physical channel; means (33, 13) that derives a third target communication quality different from the first target communication quality from the first and the second target communication qualities; and means that sets the third target communication quality to be a target value of transmission power control.

Claims

1. A communication control apparatus used in a mobile communication system including a radio base station, a mobile station performing communication with the radio base station via a radio link and a radio control station connected to the radio base station, wherein, in the communication, a channel is established for communication with an upper layer of a physical layer, and the channel has a plurality of transmission formats, the communication control apparatus comprising:

means that derives, from a first target communication quality for the channel, a second target communication quality for the plurality of transmission formats;

means that derives a third target communication quality different from the first target communication quality from the first and the second target communication qualities; and

means that sets the third target communication quality to be a target value of transmission power control in the radio link.

2. The communication control apparatus as claimed in claim 1, wherein the third target communication quality is derived such that a transmission format by which a required quality is the highest among the plurality of transmission formats satisfies the first target communication quality.

3. The communication control apparatus as claimed in claim 1, wherein the third target communication quality is derived based on use frequency of each of the plurality of transmission formats.

4. The communication control apparatus as claimed in claim 1, wherein each of the plurality of transmission formats is defined as a format transmitting data of a predetermined number of bits which is equal to or greater than 0.

5. The communication control apparatus as claimed in claim 4, wherein the plurality of transmission formats include a format for transmitting data of 0 bit and a format for transmitting a control signal of a logical channel.

6. The communication control apparatus as claimed in claim 1, wherein the third target communication quality is set to be better than the first target communication quality.

7. The communication control apparatus as claimed in claim 1, wherein the first target communication quality is a target communication quality of a logical channel and the third target communication quality is a target communication quality of a transport channel.

8. The communication control apparatus as claimed in claim 1, wherein the communication control apparatus is provided in the mobile station or in the radio control station.

9. A communication control method used in a mobile communication system including a radio base station, a mobile station performing communication with the radio base station via a radio link and a radio control station connected to the radio base station, wherein, in the communication, a channel is established for communication with an upper layer of a physical layer, and the channel has a plurality of transmission formats, the communication control method comprising:

deriving, from a first target communication quality for the channel, a second target communication quality for the plurality of transmission formats;

deriving a third target communication quality different from the first target communication quality from the first and the second target communication qualities; and

setting the third target communication quality to be a target value of transmission power control in the radio link.