Mobile communication system, communication control method, base station and mobile station to be used in the same

• US 20030073409A1
• Filed: 10/17/2002
• Published: 04/17/2003
• Est. Priority Date: 10/17/2001
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ishii, Naoto, Nobukiyo, Takahiro, Iwasaki, Motoya, Hamabe, Kojiro, Sato, Toshifumi, Mochizuki, Takashi
• Granted Patent: US 6,993,294 B2
• Time in Patent Office: Days
• US Class Current: 455/67.11
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/16 Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0238 where the received signal is an unwanted signal, e.g. interference or idle signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A HSDPA type mobile communication system includes a base station and a mobile station. The base station sets the uplink control channel with the mobile station to transmit a pilot signal. The mobile station measures a reception quality of the pilot signal to transmit the quality information to the base station using the uplink quality control channel. The base station performs transmission control of data for the mobile station using the quality information. The mobile station is set to perform control of starting and stopping transmission of the quality information so that the quality information is transmitted only as required. Therefore, power consumption in the mobile station can be reduced, interference wave power in the uplink can be reduced, and capacity of the uplink can be increased.

Claims

1. A mobile communication system comprising:

a base station; and

a mobile station,

said base station transmitting a downlink signal;

said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel,

said base station performing transmission control of data to said mobile station using said quality information,

said base station including means for transmitting data transmission notice to said mobile station by setting a downlink control channel with said mobile station, and

said mobile station including means for starting transmission of said quality information to said base station at a given internal in response to said data transmission notice while said uplink control channel is set.

2. A mobile communication system as set forth in claim 1, wherein said mobile station includes means for stopping transmission of said quality information in response to a data transmission notice from said base station while said uplink control channel is set.

4. A mobile communication system as set forth in claim 1, wherein said mobile station includes means for stopping transmission of said quality information in response to completion of data reception.

3. A mobile communication system comprising:

a base station; and

a mobile station,

said base station transmitting a downlink signal;

said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel,

said base station performing transmission control of data to said mobile station using said quality information,

said mobile station including means for transmitting said quality information at a given interval in response to reception of data, and means for transmitting a indication information indicating on transmission of said quality information using said uplink control channel.

5. A mobile communication system comprising:

a base station; and

a mobile station,

said base station transmitting a downlink signal;

said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel,

said base station performing transmission control of data to said mobile station using said quality information,

said base station including means for notifying a threshold value to said mobile station by setting downlink control channel, and

said mobile station including means for controlling transmission of said quality information to said base station at a given interval in response to a result of comparison of said threshold value and said reception quality.

6. A mobile communication system comprising:

a base station; and

a mobile station,

said base station transmitting a downlink signal;

said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel,

said base station performing transmission control of data to said mobile station using said quality information,

said base station including means for setting a downlink control channel with said mobile station and transmitting a command information indicative of a demand of reporting of said quality information to said mobile station in response to data transmission to said mobile station, and

said mobile station including means for transmitting said quality information to said base station in response to said command information.

7. A mobile communication system as set forth in claim 6, wherein said base station includes means for transmitting a command information indicative of a demand for stopping reporting of said quality information to said mobile station in response to data transmission to said mobile station, and

said mobile station includes means for stopping transmission of said quality information to said base station in response to said commend.

8. A mobile communication system as set forth in claim 6, wherein said predetermined interval is variable.

9. A communication control method in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, and said base station performing transmission control of data to said mobile station using said quality information,

said communication control method comprising:

in said base station, step of transmitting data transmission notice to said mobile station by setting a downlink control channel with said mobile station, and

in said mobile station, step of starting transmission of said quality information to said base station at a given internal in response to said data transmission notice while said uplink control channel is set.

10. A communication control method in a mobile communication system as set forth in claim 9, which further comprises, in said mobile station, step of stopping of transmitting said quality information in response to a data transmission notice from said base station while said uplink control channel is set.

11. A communication control method in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, and said base station performing transmission control of data to said mobile station using said quality information,

said communication control method comprising:

in said mobile station, step of transmitting said quality information at a given interval in response to reception of data, and step of transmitting a indication information indicating on transmission of said quality information using said uplink control channel.

12. A communication control method in a mobile communication system as set forth in claim 11, which further comprises, in said mobile station, step of stopping transmission of said quality information in response to completion of data reception.

13. A communication control method in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, and said base station performing transmission control of data to said mobile station using said quality information,

said communication control method comprising:

in said base station, step of notifying a threshold value to said mobile station by setting downlink control channel, and

in said mobile station, step of controlling transmission of said quality information to said base station at a given interval in response to a result of comparison of said threshold value and said reception quality.

14. A communication control method in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, and said base station performing transmission control of data to said mobile station using said quality information,

said communication control method comprising:

in said base station, step of setting a downlink control channel with said mobile station and transmitting a command information indicative of a demand of reporting of said quality information to said mobile station in response to data transmission to said mobile station, and

in said mobile station, step of transmitting said quality information to said base station at a given interval in response to said command information.

15. A communication control method in a mobile communication system as set forth in claim 14, which further comprises:

in said base station, step of transmitting a command information indicative of a demand for stopping reporting of said quality information to said mobile station in response to data transmission to said mobile station, and

in said mobile station, step of stopping transmission of said quality information to said base station in response to said commend.

16. A communication control method in a mobile communication system as set forth in claim 14, wherein said predetermined interval is variable.

17. A mobile station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said mobile station comprising:

means for setting a downlink control channel with said base station and receiving a data transmission notice from said base station; and

means for starting transmission of said quality information to said base station at a given internal in response to said data transmission notice while said uplink control channel is set.

18. A mobile station in a mobile communication system as set forth in claim 17, which further comprises means for stopping transmission of said quality information in response to a data transmission notice from said base station while said uplink control channel is set.

19. A mobile station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said mobile station comprising:

means for transmitting said quality information at a given interval in response to reception of data; and

means for transmitting a indication information indicating on transmission of said quality information using said uplink control channel.

20. A mobile station in a mobile communication system as set forth in claim 19, wherein said mobile station includes means for stopping transmission of said quality information in response to completion of data reception.

21. A mobile station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said mobile station comprising:

means for setting a downlink control channel with said base station and receiving a threshold value from said base station; and

means for controlling transmission of said quality information to said base station at a given interval in response to a result of comparison of said threshold value and said reception quality.

22. A mobile station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said mobile station comprising:

means for setting a downlink control channel with said base station and receiving a command information indicative of a demand of reporting of said quality information in response to data transmission; and

means for transmitting said quality information to said base station in response to said command information.

23. A mobile station in a mobile communication system as set forth in claim 22, which further comprises:

means for receiving a command information indicative of a demand for stopping reporting of said quality information from said base station in response to data transmission; and

means for stopping transmission of said quality information to said base station in response to said commend.

24. A mobile station in a mobile communication system as set forth in claim 22, wherein said predetermined interval is variable.

25. A base station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said base station comprising:

means for transmitting data transmission notice to said mobile station by setting a downlink control channel with said mobile station, and

means for receiving said quality information from said mobile station transmitting said quality information at a given internal in response to said data transmission notice while said uplink control channel is set.

26. A base station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said base station comprising:

means for receiving said quality information at a given interval from said mobile station; and

means for receiving a indication information indicating on transmission of said quality information from said mobile station using said uplink control channel.

27. A base station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said base station comprising:

means for notifying a threshold value to said mobile station by setting downlink control channel; and

means for receiving said quality information from said mobile station at a given interval in response to a result of comparison of said threshold value and said reception quality.

28. A base station in a mobile communication system including a base station and a mobile station, said base station transmitting a downlink signal, said mobile station setting an uplink control channel with said base station, measuring a reception quality of said downlink signal, transmitting a quality information depending upon said reception quality using said uplink control channel, said base station performing transmission control of data to said mobile station using said quality information,

said base station comprising:

means for setting a downlink control channel with said mobile station and transmitting a command information indicative of a demand of reporting of said quality information to said mobile station in response to data transmission to said mobile station; and

means for receiving said quality information from said mobile station.

29. A base station in a mobile communication system as set forth in claim 28, which further comprises means for transmitting a command information indicative of a demand for stopping reporting of said quality information to said mobile station in response to data transmission to said mobile station.

30. A base station in a mobile communication system as set forth in claim 28, wherein said predetermined interval is variable.