Radio base station, radio terminal apparatus, mobile body communication system, and reception operation control program

• US 20040242187A1
• Filed: 02/06/2004
• Published: 12/02/2004
• Est. Priority Date: 08/06/2001
• Status: Active Grant

• Current Assignee: Hera Wireless S.A. (Fineur International S.A.)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Ito, Tadayoshi, Nakao, Seigo, Miyata, Takeo, Doi, Yoshiharu
• Granted Patent: US 7,130,659 B2
• Time in Patent Office: Days
• US Class Current: 455/403
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0848 Joint weighting
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

In response to a connection request from a terminal, a base station transmits to the terminal a signal instructing a reception operation appropriate to the transmission operation of the base station. According to this instruction signal, the terminal selects and executes an optimal reception operation. Moreover, the terminal gives its reception operation information to the base station in advance. According to this reception operation information, the base station transmits a reception instruction operation to the terminal. These processes are realized by software using DSP (12, 14) or the like.

Claims

1. A radio base station apparatus to which a radio terminal apparatus can connect, said radio base station apparatus performing a transmission operation with transmission directivity to said radio terminal apparatus, comprising:

reception means (100, 110, 120, MR1-MR4) for accepting a connection request from said radio terminal apparatus; and

transmission means (130, 140, MT1-MT4) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said connection request, wherein

said transmission means transmit to said radio terminal apparatus a signal indicating an adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes.

2. A radio base station apparatus to which a radio terminal apparatus can connect, said radio base station apparatus performing a transmission operation without transmission directivity to said radio terminal apparatus, comprising:

reception means (100, 110, 120, MR1-MR4) for accepting a connection request from said radio terminal apparatus; and

transmission means (130, 140, MT1-MT4) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to the transmission operation of said radio base station apparatus in response to said connection request, wherein

said transmission means transmit to said radio terminal apparatus a signal indicating a diversity reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes.

3. A radio terminal apparatus that can connect to a radio base station apparatus, said radio base station apparatus to be connected performing a transmission operation with transmission directivity to said radio terminal apparatus, said radio base station apparatus including transmission means for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to a connection request from said radio terminal apparatus, and said transmission means transmitting to said radio terminal apparatus a signal indicating an adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes,

said radio terminal apparatus comprising:

means for performing a connection request to said radio base station apparatus to connect to;

means (16) for receiving said signal indicating the reception operation transmitted from said radio base station apparatus in response to said connection request;

means (12a, 14a) for determining whether the reception operation indicated by said received signal is possible to be performed or not; and

reception operation control means (12b, 14b) for performing said indicated reception operation when said indicated reception operation is determined possible to be performed, and for performing a prescribed reception operation when said indicated reception operation is determined impossible to be performed.

4. The radio terminal apparatus according to claim 3, wherein

said radio terminal apparatus is a radio terminal apparatus performing transmission and reception with one antenna, and

said reception operation control means perform a reception operation with said one antenna in response to said signal indicating the adaptive array reception operation.

5. The radio terminal apparatus according to claim 3, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas, and

said reception operation control means perform a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation from the radio base station apparatus in response to said signal indicating the adaptive array reception operation.

6. The radio terminal apparatus according to claim 3, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform the adaptive array reception with a plurality of antennas, and

said reception operation control means perform the adaptive array reception operation in response to said signal indicating the adaptive array reception operation.

7. The radio terminal apparatus according to claim 6, wherein

said prescribed reception operation that is performed when said indicated reception operation is determined impossible to be performed is a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation from the radio base station apparatus.

8. The radio terminal apparatus according to claim 6, wherein

said prescribed reception operation that is performed when said indicated reception operation is determined impossible to be performed is the adaptive array reception operation.

9. A radio terminal apparatus that can connect to a radio base station apparatus, said radio base station apparatus to be connected performing a transmission operation without transmission directivity to said radio terminal apparatus, said radio base station apparatus including transmission means for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to the transmission operation of said radio base station apparatus in response to a connection request from said radio terminal apparatus, and said transmission means transmitting to said radio terminal apparatus a signal indicating a diversity reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes,

said radio terminal apparatus comprising:

means for performing a connection request to said radio base station apparatus to connect to;

means (16) for receiving a signal indicating said reception operation transmitted from said radio base station apparatus in response to said connection request;

means (12a, 14a) for determining whether the reception operation indicated by said received signal is possible to be performed or not; and

reception operation control means (12b, 14b) for performing said indicated reception operation when said indicated reception operation is determined possible to be performed, and for performing a prescribed reception operation when said indicated reception is determined impossible to be performed.

10. The radio terminal apparatus according to claim 9, wherein

said radio terminal apparatus is a radio terminal apparatus performing transmission and reception with one antenna, and

said reception operation control means perform a reception operation with said one antenna in response to said signal indicating the diversity reception operation.

11. The radio terminal apparatus according to claim 9, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas, and

said reception operation control means perform the diversity reception operation in response to said signal indicating the diversity reception operation.

12. The radio terminal apparatus according to claim 9, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas, and

said reception operation control means perform the diversity reception operation in response to said signal indicating the diversity reception operation.

13. A mobile communication system comprising a radio base station apparatus and a radio terminal apparatus, wherein

said radio base station apparatus performs a transmission operation with transmission directivity to said radio terminal apparatus, and includes

reception means (100, 110, 120, MR1-MR4) for accepting a connection request from said radio terminal apparatus;

and

transmission means (130, 140, MT1-MT4) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said connection request, said transmission means transmitting to said radio terminal apparatus a signal indicating an adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes,

said radio terminal apparatus includes

means for performing a connection request to said radio base station apparatus to connect to,

means (16) for receiving said signal indicating the reception operation transmitted from said radio base station apparatus in response to said connection request,

means (12a, 14a) for determining whether the reception operation indicated by said received signal is possible to be performed or not, and

reception operation control means (12b, 14b) for performing said indicated reception operation when said indicated reception operation is determined possible to be performed, and for performing a prescribed reception operation when said indicated reception operation is determined impossible to be performed.

14. The mobile communication system according to claim 13, wherein

said radio terminal apparatus is a radio terminal apparatus performing transmission and reception with one antenna, and

said reception operation control means perform a reception operation with said one antenna in response to said signal indicating the adaptive array reception operation.

15. The mobile communication system according to claim 13, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas, and

said reception operation control means perform a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation with the radio base station apparatus in response to said signal indicating the adaptive array reception operation.

16. The mobile communication system according to claim 13, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform the adaptive array reception with a plurality of antennas, and

said reception operation control means perform the adaptive array reception operation in response to said signal indicating the adaptive array reception operation.

17. The mobile communication system according to claim 16, wherein

said prescribed reception operation that is performed when said indicated reception operation is determined impossible to be performed is a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation from the radio base station apparatus.

18. The mobile communication system according to claim 16, wherein

said prescribed reception operation that is performed when said indicated reception operation is determined impossible to be performed is the adaptive array reception operation.

19. A mobile communication system comprising a radio base station apparatus and a radio terminal apparatus, wherein

said radio base station apparatus performs a transmission operation without transmission directivity to said radio terminal apparatus, and includes

reception means (100, 110, 120, MR1-MR4) for accepting a connection request from said radio terminal apparatus;

and

transmission means (130, 140, MT1-MT4) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to the transmission operation of said radio base station apparatus in response to said connection request, said transmission means transmitting to said radio terminal apparatus a signal indicating a diversity reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes,

said radio terminal apparatus includes

means for performing a connection request to said radio base station apparatus to connect to,

means (16) for receiving said signal indicating the reception operation transmitted from said radio base station apparatus in response to said connection request,

means (12a, 14a) for determining whether the reception operation indicated by said received signal is possible to be performed or not, and

reception operation control means (12b, 14b) for performing said indicated reception operation when said indicated reception operation is determined possible to be performed, and for performing a prescribed reception operation when said indicated reception operation is determined impossible to be performed.

20. The mobile communication system according to claim 19, wherein

said radio terminal apparatus is a radio terminal apparatus performing transmission and reception with one antenna, and

said reception operation control means perform a reception operation with said one antenna in response to said signal indicating the diversity reception operation.

21. The mobile communication system according to claim 19, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas, and

said reception operation control means perform the diversity reception operation in response to said signal indicating the diversity reception operation.

22. The mobile communication system according to claim 19, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas, and

said reception operation control means perform the diversity reception operation in response to said signal indicating the diversity reception operation.

23. A reception operation control program for controlling, in a radio base station apparatus to which a radio terminal apparatus can connect, a reception operation of the radio terminal apparatus that is to connect to said radio base station apparatus, said radio base station apparatus performing a transmission operation with transmission directivity to said radio terminal apparatus,

said program causing a computer to execute the steps of:

accepting a connection request from said radio terminal apparatus; and

transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said connection request, wherein

said step of transmitting said signal indicating the reception operation includes a step of transmitting to said radio terminal apparatus a signal indicating an adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes.

24. A reception operation control program for controlling, in a radio base station apparatus to which a radio terminal apparatus can connect, a reception operation of the radio terminal apparatus that is to connect to said radio base station apparatus, said radio base station apparatus performing a transmission operation without transmission directivity to said radio terminal apparatus,

said program causing a computer to execute the steps of:

accepting a connection request from said radio terminal apparatus; and

transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said connection request, wherein

said step of transmitting said signal indicating the reception operation includes a step of transmitting to said radio terminal apparatus a signal indicating a diversity reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes.

25. A reception operation control program for controlling a reception operation in a radio terminal apparatus that can connect to a radio base station apparatus, said radio base station apparatus to be connected performing a transmission operation with transmission directivity to said radio terminal apparatus, said radio base station apparatus including transmission means for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to a connection request from said radio terminal apparatus, and said transmission means transmitting to said radio terminal apparatus a signal indicating an adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes,

said reception operation control program causing a computer to execute the steps of:

performing a connection request to said radio base station apparatus to connect to;

receiving said signal indicating the reception operation transmitted from said radio base station apparatus in response to said connection request;

determining whether said reception operation indicated by said received signal is possible to be performed or not; and

performing the reception operation when said indicated reception operation is determined possible to be performed, and performing a prescribed reception operation when said indicated reception operation is determined impossible to be performed.

26. The reception operation control program according to claim 25, wherein

said radio terminal apparatus is a radio terminal apparatus performing transmission and reception with one antenna, and

said step of performing the reception operation includes a step of performing a reception operation with said one antenna in response to said signal indicating the adaptive array reception operation.

27. The reception operation control program according to claim 25, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas, and

said step of performing the reception operation includes a step of performing a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation with the radio base station apparatus in response to said signal indicating the adaptive array reception operation.

28. The reception operation control program according to claim 25, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform the adaptive array reception with a plurality of antennas, and

said step of performing the reception operation includes a step of performing the adaptive array reception operation in response to said signal indicating the adaptive array reception operation.

29. The reception operation control program according to claim 28, wherein

said prescribed reception operation that is performed when said indicated reception operation is determined impossible to be performed is a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation from the radio base station apparatus.

30. The reception operation control program according to claim 28, wherein

said prescribed reception operation that is performed when said indicated reception operation is determined impossible to be performed is the adaptive array reception operation.

31. A reception operation control program for controlling a reception operation in a radio terminal apparatus that can connect to a radio base station apparatus, said radio base station apparatus to be connected performing a transmission operation without transmission directivity to said radio terminal apparatus, said radio base station apparatus including transmission means for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to a connection request from said radio terminal apparatus, and said transmission means transmitting a signal indicating a diversity reception operation to said radio terminal apparatus constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes,

said reception operation control program causing a computer to execute the steps of:

performing a connection request to said radio base station apparatus to connect to;

receiving said signal indicating the reception operation transmitted from said radio base station apparatus in response to said connection request;

determining whether said reception operation indicated by said received signal is possible to be performed or not; and

performing the reception operation when said indicated reception operation is determined possible to be performed, and performing a prescribed reception operation when said indicated reception operation is determined impossible to be performed.

32. The reception operation control program according to claim 31, wherein

said radio terminal apparatus is a radio terminal apparatus performing transmission and reception with one antenna, and

said step of performing the reception operation includes a step of performing a reception operation with said one antenna in response to said signal indicating the diversity reception operation.

33. The reception operation control program according to claim 31, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas, and

said step of performing the reception operation includes a step of performing the diversity reception operation in response to said signal indicating the diversity reception operation.

34. The reception operation control program according to claim 31, wherein

said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas, and

said step of performing the reception operation includes a step of performing the diversity reception operation in response to said signal indicating the diversity reception operation.

35. A radio base station apparatus to which a radio terminal apparatus can connect, said radio base station apparatus performing a transmission operation with transmission directivity to said radio terminal apparatus, and said radio terminal apparatus including means for transmitting to said radio base station apparatus terminal operation information identifying a type of a reception operation of said radio terminal apparatus,

said radio base station apparatus comprising:

reception means (100, 110, 120, MR1-MR4) for receiving a connection request and said terminal operation information from said radio terminal apparatus; and

indicating signal transmitting means (130, 140, 150, MT1-MT4) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said terminal operation information, wherein

said indicating signal transmitting means include

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a reception operation in which an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation from the radio base station apparatus constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform diversity reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating the adaptive array reception operation constantly even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform adaptive array reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that performs transmission and reception with one antenna or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to said one antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that performs transmission and reception with one antenna, and

means (130, 150) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to a specific antenna constantly even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined not to be any of a radio terminal apparatus that can perform diversity reception, a radio terminal apparatus that can perform adaptive array reception, and a radio terminal apparatus performing transmission and reception with one antenna based on said terminal operation information.

36. A radio base station apparatus to which a radio terminal apparatus can connect, said radio base station apparatus performing a transmission operation without transmission directivity to said radio terminal apparatus, and said radio terminal apparatus including means for transmitting to said radio base station apparatus terminal operation information identifying a type of a reception operation of said radio terminal apparatus,

said radio base station apparatus comprising:

reception means (100, 110, 120, MR1-MR4) for receiving a connection request and said terminal operation information from said radio terminal apparatus; and

indicating signal transmitting means (130, 140, 150, MT1-MT4) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said terminal operation information, wherein

said indicating signal transmitting means include

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a diversity reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform diversity reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating the adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform adaptive array reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that performs transmission and reception with one antenna or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to said one antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that performs transmission and reception with one antenna, and

means (130, 150) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to a specific antenna constantly even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined not to be any of a radio terminal apparatus that can perform diversity reception, a radio terminal apparatus that can perform adaptive array reception, and a radio terminal apparatus performing transmission and reception with one antenna based on said terminal operation information.

37. A mobile communication system comprising a radio base station apparatus and a radio terminal apparatus, wherein

said radio base station apparatus performs a transmission operation with transmission directivity to said radio terminal apparatus, and includes

reception means (100, 110, 120, MR1-MR4) for receiving a connection request and terminal operation information identifying a type of reception operation of said radio terminal apparatus from said radio terminal apparatus, and

indicating signal transmission means (130, 140, 150) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to the transmission operation of said radio base station apparatus in response to said terminal operation information;

said radio terminal apparatus includes

means for performing said connection request to said radio base station apparatus to connect to,

means (17) for transmitting said terminal operation information to said base station to be connected,

means (16) for receiving said signal indicating the reception operation transmitted from said radio base station apparatus in response to said terminal operation information, and

means (12, 14) for performing the reception operation indicated by said received signal;

said indicating signal transmitting means of said radio base station apparatus include

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation from the radio base station apparatus constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform diversity reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating the adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform adaptive array reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that performs transmission and reception with one antenna or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to said one antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that performs transmission and reception with one antenna, and

means (130, 150) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to a specific antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined not to be any of a radio terminal apparatus that can perform diversity reception, a radio terminal apparatus that can perform adaptive array reception, and a radio terminal apparatus performing transmission and reception with one antenna based on said terminal operation information.

38. A mobile communication system comprising a radio base station apparatus and a radio terminal apparatus, wherein

said radio base station apparatus performs a transmission operation without transmission directivity to said radio terminal apparatus, and includes

reception means (100, 110, 120, MR1-MR4) for receiving a connection request and terminal operation information identifying a type of reception operation of said radio terminal apparatus from said radio terminal apparatus, and

indicating signal transmission means (130, 140, 150) for transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to the transmission operation of said radio base station apparatus in response to said terminal operation information;

said radio terminal apparatus includes

means for performing said connection request to said radio base station apparatus to connect to,

means (17) for transmitting said terminal operation information to said base station apparatus to connect to,

means (16) for receiving said signal indicating the reception operation transmitted from said radio base station apparatus in response to said terminal operation information, and

means (12, 14) for performing the reception operation indicated by said received signal;

said indicating signal transmitting means of said radio base station apparatus include

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a diversity reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform diversity reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating the adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform adaptive array reception,

means (150) for determining whether said radio terminal apparatus is a radio terminal apparatus that performs transmission and reception with one antenna or not based on said terminal operation information,

means (130) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to said one antenna constantly even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that performs transmission and reception with one antenna,

means (130, 150) for transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to a specific antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined not to be any of a radio terminal apparatus that can perform diversity reception, a radio terminal apparatus that can perform adaptive array reception, and a radio terminal apparatus performing transmission and reception with one antenna based on said terminal operation information.

39. A reception operation control program for controlling, in a radio base station apparatus to which a radio terminal apparatus can connect, a reception operation of a radio terminal apparatus that is to connect to said radio base station apparatus,

said radio base station apparatus performing a transmission operation with transmission directivity to said radio terminal apparatus,

said radio terminal apparatus including means for transmitting to said radio base station apparatus terminal operation information identifying a type of a reception operation of said radio terminal apparatus,

said reception operation control program causing a computer to execute the steps of:

receiving a connection request and said terminal operation information from said radio terminal apparatus; and

transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said terminal operation information, wherein

said step of transmitting the indicating signal includes the steps of

determining whether said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas or not based on said terminal operation information,

transmitting to said radio terminal apparatus a signal indicating a reception operation in which a reception diversity operation selecting an antenna with a higher reception level among said plurality of antennas and performing reception is stopped, and an antenna used for a signal transmission to the radio base station apparatus among said plurality of antennas is used for an immediately following reception operation from the radio base station apparatus constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform diversity reception,

determining whether said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas or not based on said terminal operation information,

transmitting to said radio terminal apparatus a signal indicating the adaptive array reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform adaptive array reception,

determining whether said radio terminal apparatus is a radio terminal apparatus that performs transmission and reception with one antenna or not based on said terminal operation information,

transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to said one antenna constantly even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that performs transmission and reception with one antenna, and

transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to a specific antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined not to be any of a radio terminal apparatus that can perform diversity reception, a radio terminal apparatus that can perform adaptive array reception, and a radio terminal apparatus performing transmission and reception with one antenna based on said terminal operation information.

40. A reception operation control program for controlling, in a radio base station apparatus to which a radio terminal apparatus can connect, a reception operation of a radio terminal apparatus that is to connect to said radio base station apparatus,

said radio base station apparatus performing a transmission operation without transmission directivity to said radio terminal apparatus, and

said radio terminal apparatus including means for transmitting to said radio base station apparatus terminal operation information identifying a type of a reception operation of said radio terminal apparatus, wherein

said reception operation control program causing a computer to execute the steps of:

receiving a connection request and said terminal operation information from said radio terminal apparatus; and

transmitting to said radio terminal apparatus a signal indicating a reception operation adapted to a transmission operation of said radio base station apparatus in response to said terminal operation information, wherein

said step of transmitting an indicating signal includes the steps of

determining whether said radio terminal apparatus is a radio terminal apparatus that can perform diversity reception with a plurality of antennas or not based on said terminal operation information,

transmitting to said radio terminal apparatus a signal indicating a diversity reception operation constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform diversity reception,

determining whether said radio terminal apparatus is a radio terminal apparatus that can perform adaptive array reception with a plurality of antennas or not based on said terminal operation information,

transmitting to said radio terminal apparatus a signal indicating the adaptive array reception operation constantly even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that can perform adaptive array reception,

determining whether said radio terminal apparatus is a radio terminal apparatus that performs transmission and reception with one antenna or not based on said terminal operation information,

transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to said one antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined to be a radio terminal apparatus that performs transmission and reception with one antenna, and

transmitting to said radio terminal apparatus a signal indicating a reception operation fixing to a specific antenna constantly, even when a radio wave environment between the radio base station apparatus and said radio terminal apparatus changes, when said radio terminal apparatus is determined not to be any of a radio terminal apparatus that can perform diversity reception, a radio terminal apparatus that can perform adaptive array reception, and a radio terminal apparatus performing transmission and reception with one antenna based on said terminal operation information.