Radio communication apparatus and radio communication method

• US 6,490,263 B2
• Filed: 12/20/2001
• Issued: 12/03/2002
• Est. Priority Date: 05/08/1998
• Status: Expired due to Term

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hayashi, Masaki, Miya, Kazuyuki, Kitade, Takashi
• Primary Examiner(s): Yao, Kwang Bin
• Assistant Examiner(s): NGUYEN, HANH N
• Application Number:
  US10/022,214
• Publication Number:
  US 20020051439A1
• Time in Patent Office: 348 Days
• Field of Search: 370/337, 370/318, 370/320, 370/324, 370/328, 370/329, 370/350, 370/377, 370/335, 370/342, 370/332, 370/441, 370/503, 370/507, 370/508, 370/509, 370/510, 370/519, 455/69, 455/522, 455/88
• US Class Current: 370/337
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure
• CPC Class Codes: H04W 52/58 Format of the TPC bits

Abstract

The base station apparatus according to the present invention places pilot data and transmission power control data independently of each other in a slot based on processing delays and propagation delays required for transmission power control and places slots by providing an offset for the slot locational relationship between the uplink and downlink.

Claims

1. A radio communication system for performing closed-loop transmission power control between a base station apparatus and a mobile station apparatus, said system comprising:

a base station apparatus that transmits a slot in which transmission power control data and pilot data are arranged separated from each other; and

a mobile station apparatus that transmits a slot on uplink with an offset that is within one slot relative to a reception timing of said slot on downlink.

2. The radio communication system according to claim 1, wherein an interval between the transmission power control data and the pilot data on the slot on downlink in said base station apparatus and a value of the offset in said mobile station apparatus are set so that transmission power control delay time both on uplink and on downlink each are set to within one time slot.

3. The mobile station apparatus used in the radio communication system according to claim 2, further comprising:

an offset control section that provides said offset to transmit said slot on uplink based on said reception timing of said slot on downlink.

4. The mobile station apparatus according to claim 3, further comprising:

a transmission power control section that changes uplink output power at the beginning of first pilot data after reception of the transmission power control data of said slot on downlink.

5. The base station apparatus used in the radio communication system according to claim 2, wherein said base station apparatus transmits a frame having a plurality of transmission slots in which transmission power control data and pilot data are arranged separated from each other in each of said transmission slots, said base station apparatus further comprising:

a frame configuration section that arranges the transmission power control data and the pilot data separated from each other within each of said transmission slots.

6. The base station apparatus according to claim 5, further comprising:

a transmission power control section that changes downlink output power at the beginning of next pilot data after reception of transmission power control data of said slot on uplink.

7. The mobile station apparatus used in the radio communication system according to claim 1, further comprising:

an offset control section that provides said offset to transmit said slot on uplink based on said reception timing of said slot on downlink.

8. The mobile station apparatus according to claim 7, further comprising:

a transmission power control section that changes uplink output power at the beginning of first pilot data after reception of the transmission power control data of said slot on downlink.

9. The base station apparatus used in the radio communication system according to claim 1, wherein said base station apparatus transmits a frame having a plurality of transmission slots in which transmission power control data and pilot data are arranged separated from each other in each of said transmission slots, said base station apparatus further comprising:

a frame configuration section that arranges the transmission power control data and the pilot data separated from each other within each of said transmission slots.

10. The base station apparatus according to claim 9, further comprising:

a transmission power control section that changes downlink output power at the beginning of next pilot data after reception of transmission power control data of said slot on uplink.

11. The base station apparatus according to claim 9, wherein the base station apparatus performs a communication at different transmission rates, while the pilot data and the transmission power control data are arranged so that an interval between the pilot data and the transmission power control data downlink is the same for every transmission rate.

12. The base station apparatus according to claim 9, wherein the base station apparatus performs a communication at different transmission rates, while the pilot data and the transmission power control data are arranged so that a rear end of the pilot data is kept on the same time for every transmission rate.

13. A radio communication method for performing closed-loop transmission power control between a base station apparatus and a mobile station apparatus, said method comprising the steps of:

transmitting, in said base station apparatus, a slot on downlink in which transmission power control data and pilot data are arranged separated from each other; and

providing, in said mobile station apparatus, an offset to transmit a slot on uplink, said off set being within one slot relative to a reception timing of said slot on downlink.

14. The radio communication method according to claim 13, wherein said transmitting step includes performing a communication at different transmission rates, while the pilot data and the transmission power control data are arranged so that an interval between the pilot data and the transmission power control data on downlink is the same for every transmission rate.

15. The radio communication method according to claim 13, wherein said transmitting step includes performing a communication at different transmission rates, while the pilot data and the transmission power control data are arranged so that a rear end of the pilot data is kept on the same time for every transmission rate.

16. A transmission power control method in a mobile station apparatus wherein closed-loop transmission power control is performed between a base station apparatus and said mobile station apparatus, said method comprising the steps of:

receiving a slot on downlink transmitted from said base station apparatus in which transmission power control data and pilot data are arranged separated from each other; and

transmitting, in said mobile station apparatus, a slot on uplink having an offset within one slot relative to a reception timing of said slot on downlink.

17. The transmission power control method in said mobile station apparatus according to claim 16, wherein said mobile station apparatus changes uplink output power at the beginning of first pilot data after reception of the transmission power control data from said base station apparatus.

18. A transmission power control method in a base station apparatus wherein closed-loop transmission power control is performed between a base station apparatus and said mobile station apparatus, said method comprising the steps of:

receiving a slot on uplink transmitted from said mobile station apparatus, said slot on uplink having an offset within one slot relative to a reception timing of a slot on downlink; and

transmitting said slot on downlink and arranging, in said base station apparatus, the transmission power control data and the pilot data separated from each other within said slot on downlink.

19. The transmission power control method in said base station apparatus according to claim 18, wherein said base station apparatus changes downlink transmission power at the beginning of next pilot data after reception of uplink transmission power control data.

20. The transmission power control method according to claim 18, further comprising the steps of:

performing multi-rate transmission; and

arranging the pilot data and the transmission power control data in performing the multi-rate transmission so that an interval between the pilot data and the transmission power control data on downlink is the same for every transmission rate.

21. The transmission power control method according to claim 18, further comprising the steps of:

performing multi-rate transmission; and

arranging the pilot data and the transmission power control data so that a rear end of the pilot data is kept on the same time for every transmission rate.