Data transmission/reception system, mobile terminal, content server, radio base station device and method for data transmission/reception

• US 20030186704A1
• Filed: 03/25/2003
• Published: 10/02/2003
• Est. Priority Date: 03/26/2002
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Tamura, Ryo, Fukuizumi, Takeshi
• Granted Patent: US 7,447,486 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A data transmission/reception system for offering content download service through a wireless communication network, in which users can obtain desired content on demand from the beginning of content data, and the shortage of line capacity can be alleviated, thus enabling a reduction of communication charges. A mobile terminal is provided with two types of downloading means, an immediate download processing means and a reservation download processing means. The reservation download processing means makes a download reservation by storing the meta-data of desired content. When transmitting content to one mobile terminal that has made a request for an immediate download of the content, a radio base station allocates a prescribed channel for the mobile terminal and sends notification including information on the allocated channel to other mobile terminals in the radio communication zone of the radio base station. Having received the notification, each mobile terminal tunes in to the channel, and selectively download reserved content.

Claims

1. A data transmission/reception system, comprising:

a radio base station;

a plurality of mobile terminals; and

a content server for managing contents;

wherein;

the radio base station includes a means for assigning a prescribed channel to the first mobile terminal when transmitting content to the first mobile terminal via a radio link, and notifying the second mobile terminal in the radio communication zone of the radio base station about the channel; and

the second mobile terminal includes a means for downloading the content using the channel in common with the first mobile terminal when notified of the channel.

2. The data transmission/reception system claimed in claim 1, wherein the second mobile terminal includes a reservation means for reserving a download of content, and selectively downloads the content reserved by the reservation means via the radio link.

3. The data transmission/reception system claimed in claim 2, wherein:

the reservation means reserves a download of content by storing meta-data of the content in a reservation meta-data managing section as reserved meta-data; and

the second mobile terminal downloads the content when the reserved meta-data matches meta-data of the content to be transmitted to the first mobile terminal from the radio base station.

4. The data transmission/reception system claimed in claim 3, wherein:

the second mobile terminal internally includes the reservation meta-data managing section;

the radio base station notifies the second mobile terminal about the meta-data of the content to be transmitted to the first mobile terminal in addition to about the channel; and

the second mobile terminal matches the notified meta-data with the reserved meta-data, and downloads the content when the two meta-data match.

5. A data transmission/reception system, comprising:

a radio base station;

a plurality of mobile terminals; and

a content server for managing contents;

wherein;

the mobile terminals each include an immediate download processing means for immediately downloading desired content from the content server, and a reservation download processing means for reserving a download of content to download the content afterwards;

the reservation download processing means reserves a download of desired content by obtaining and storing meta-data of the content;

the radio base station assigns a downlink shared channel to the mobile terminal which immediately downloads content by the immediate download processing means when transmitting the content thereto, and simultaneously notifies all the mobile terminals in the radio communication zone of the radio base station about information on the downlink shared channel and meta-data of the outgoing content; and

the mobile terminals that have been notified of the information match the notified meta-data with the meta-data stored by the reservation download processing means, and tune in to the downlink shared channel to download the content when the outgoing content proves coincident with the reserved content.

7. The data transmission/reception system claimed in claim 5, wherein the mobile terminal further includes a means for operating in standby for a certain period of waiting time after reserving a download of content and, when receiving no notification from the radio base station within the waiting time, making a request to the content server for an immediate download of the content to download the reserved content.

9. The data transmission/reception system claimed in claim 7, wherein the mobile terminal further includes a means by which a user sets the waiting time, and operates in standby based on the waiting time set by the user.

11. The data transmission/reception system claimed in claim 5, wherein the mobile terminal further includes a means for making a request to the radio base station for missing data packets through a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content by downloading.

13. The data transmission/reception system claimed in claim 7, wherein the mobile terminal further includes a means for making a request to the radio base station for missing data packets through a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content by downloading.

15. The data transmission/reception system claimed in claim 9, wherein the mobile terminal further includes a means for making a request to the radio base station for missing data packets through a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content by downloading.

17. The data transmission/reception system claimed in claim 5, further comprising:

an accounting server; and

a determining means for determining a download type adopted by the respective mobile terminals; and

wherein;

the accounting server maintains communication records with regard to downloads made by the mobile terminals, and conducts accounting for the mobile terminals according to the download type determined by the determining means.

19. The data transmission/reception system claimed in claim 7, further comprising:

an accounting server; and

a determining means for determining a download type adopted by the respective mobile terminals; and

wherein;

the accounting server maintains communication records with regard to downloads made by the mobile terminals, and conducts accounting for the mobile terminals according to the download type determined by the determining means.

21. The data transmission/reception system claimed in claim 9, further comprising:

an accounting server; and

a determining means for determining a download type adopted by the respective mobile terminals; and

wherein;

the accounting server maintains communication records with regard to downloads made by the mobile terminals, and conducts accounting for the mobile terminals according to the download type determined by the determining means.

22. The data transmission/reception system claimed in claim 11, further comprising:

an accounting server; and

a determining means for determining a download type adopted by the respective mobile terminals; and

wherein;

the accounting server maintains communication records with regard to downloads made by the mobile terminals, and conducts accounting for the mobile terminals according to the download type determined by the determining means.

24. The data transmission/reception system claimed in claim 17, wherein:

the mobile terminal sends a reception completion message to the radio base station on completion of downloading;

the radio base station determines a download type adopted by the mobile terminal based on the reception completion message, and sends information including the determined download type, the reception completion message and the amount of communicated data to the accounting server; and

the accounting server stores the information sent from the radio base station as the communication records to conduct accounting according to the communication records.

26. The data transmission/reception system claimed in claim 5, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

28. The data transmission/reception system claimed in claim 7, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

30. The data transmission/reception system claimed in claim 9, wherein the mobile terminal further includes a category reservation means for specifying a certain-category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

31. The data transmission/reception system claimed in claim 11, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

33. The data transmission/reception system claimed in claim 17, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

35. The data transmission/reception system claimed in claim 24, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

36. The data transmission/reception system claimed in claim 26, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the category reservation means specifies the attribute value and stores it to reserve downloads of contents by category; and

the mobile terminal that has received notification from the radio base station matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

38. The data transmission/reception system claimed in claim 5, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

40. The data transmission/reception system claimed in claim 7, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

42. The data transmission/reception system claimed in claim 9, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

43. The data transmission/reception system claimed in claim 11, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

45. The data transmission/reception system claimed in claim 17, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

47. The data transmission/reception system claimed in claim 24, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

48. The data transmission/reception system claimed in claim 26, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

50. The data transmission/reception system claimed in claim 36, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

6. A data transmission/reception system, comprising:

a radio base station;

a plurality of mobile terminals; and

a content server for managing contents and meta-data thereof to offer download service to the mobile terminals;

wherein;

the mobile terminals each include a data communication section provided with an immediate download processing means for immediately downloading desired content from the content server, and a reservation download processing means for reserving a download of desired content by obtaining and storing meta-data of the content to download the content afterwards;

when receiving a request for an immediate download from one of the mobile terminals, the content server sends content data and meta-data of the requested content to the mobile terminal in response;

when receiving a request for a reservation download of content from one of the mobile terminals, the content server sends meta-data of the requested content to the mobile terminal in response;

the radio base station assigns a downlink shared channel to the mobile terminal when transmitting the content data and meta-data of the requested content sent from the content server by the immediate download request, and simultaneously notifies all the mobile terminals in the radio communication zone of the radio base station about information on the downlink shared channel and meta-data of the outgoing content; and

the mobile terminals that have been notified of the information match the notified meta-data with the meta-data stored by the reservation download processing means, and tune in to the downlink shared channel to download the content when the outgoing content proves coincident with the reserved content.

8. The data transmission/reception system claimed in claim 6, wherein the mobile terminal further includes a means for operating in standby for a certain period of waiting time after reserving a download of content and, when receiving no notification from the radio base station within the waiting time, making a request to the content server for an immediate download of the content to download the reserved content.

10. The data transmission/reception system claimed in claim 8, wherein the mobile terminal further includes a means by which a user sets the waiting time, and operates in standby based on the waiting time set by the user.

12. The data transmission/reception system claimed in claim 6, wherein the mobile terminal further includes a means for making a request to the radio base station for missing data packets through a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content by downloading.

14. The data transmission/reception system claimed in claim 8, wherein the mobile terminal further includes a means for making a request to the radio base station for missing data packets through a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content by downloading.

16. The data transmission/reception system claimed in claim 10, wherein the mobile terminal further includes a means for making a request to the radio base station for missing data packets through a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content by downloading.

18. The data transmission/reception system claimed in claim 6, further comprising:

an accounting server; and

a determining means for determining a download type adopted by the respective mobile terminals; and

wherein;

the accounting server maintains communication records with regard to downloads made by the mobile terminals, and conducts accounting for the mobile terminals according to the download type determined by the determining means.

20. The data transmission/reception system claimed in claim 8, further comprising:

an accounting server; and

a determining means for determining a download type adopted by the respective mobile terminals; and

wherein;

the accounting server maintains communication records with regard to downloads made by the mobile terminals, and conducts accounting for the mobile terminals according to the download type determined by the determining means.

23. The data transmission/reception system claimed in claim 12, further comprising:

an accounting server; and

a determining means for determining a download type adopted by the respective mobile terminals; and

wherein;

the accounting server maintains communication records with regard to downloads made by the mobile terminals, and conducts accounting for the mobile terminals according to the download type determined by the determining means.

25. The data transmission/reception system claimed in claim 18, wherein:

the mobile terminal sends a reception completion message to the radio base station on completion of downloading;

the radio base station determines a download type adopted by the mobile terminal based on the reception completion message, and sends information including the determined download type, the reception completion message and the amount of communicated data to the accounting server; and

the accounting server stores the information sent from the radio base station as the communication records to conduct accounting according to the communication records.

27. The data transmission/reception system claimed in claim 6, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

29. The data transmission/reception system claimed in claim 8, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

32. The data transmission/reception system claimed in claim 12, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

34. The data transmission/reception system claimed in claim 18, wherein the mobile terminal further includes a category reservation means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

37. The data transmission/reception system claimed in claim 27, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the category reservation means specifies the attribute value and stores it to reserve downloads of contents by category; and

the mobile terminal that has received notification from the radio base station matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

39. The data transmission/reception system claimed in claim 6, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

41. The data transmission/reception system claimed in claim 8, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

44. The data transmission/reception system claimed in claim 12, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

46. The data transmission/reception system claimed in claim 18, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

49. The data transmission/reception system claimed in claim 27, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content in the mobile terminals as an information element; and

the mobile terminal regulates and controls the use of the content according to the copyright information after the completion of downloading.

51. A mobile terminal comprising:

a radio communication section for having radio communication with a radio base station via a radio link; and

a means for reserving a download of content that is sent from the radio base station via a radio downlink;

wherein;

when receiving information on a channel in the radio link for transmitting content from the base station, the mobile terminal selectively downloads the reserved content through the channel.

58. The mobile terminal claimed in claim 51, wherein the mobile terminal further comprises a means for sending a request for missing data packets to the radio base station via a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content through downloading performed by the reservation download processing means.

64. The mobile terminal claimed in claim 51, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the mobile terminal further comprises a means for specifying the attribute value and stores it to reserve downloads of contents by category and, when receiving the notification from the radio base station, matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

69. The mobile terminal claimed in claim 58, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the mobile terminal further comprises a means for specifying the attribute value and stores it to reserve downloads of contents by category and, when receiving the notification from the radio base station, matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

71. The mobile terminal claimed in claim 51, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

76. The mobile terminal claimed in claim 58, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

79. The mobile terminal claimed in claim 64, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

52. A mobile terminal which is linked to a radio base station via a radio link and downloads content by communicating with a content server, comprising:

a radio communication section for having radio communication with the radio base station via the radio link;

a data communication section for communicating data with the content server through the radio communication section; and

a content storage/reproduction section for storing/reproducing content downloaded from the content server;

wherein;

the data communication section is provided with an immediate download processing means for immediately downloading content, and a reservation download processing means for reserving a download of content to download the content afterwards; and

when receiving notification including information on a downlink shared channel for transmitting content from the base station, the data communication section tunes in to the downlink shared channel and selectively downloads the reserved content.

53. The mobile terminal claimed in claim 52, wherein:

the reservation download processing means reserves a download of desired content by storing meta-data of the content in the mobile terminal;

when receiving notification including information on the meta-data of outgoing content in the radio link and the downlink shared channel for transmitting the content, the data communication section matches the meta-data in the notification with the meta-data stored by the reservation download processing means, and tunes in to the downlink shared channel to download the content when two meta-data match.

54. The mobile terminal claimed in claim 52, wherein the mobile terminal further comprises a means for operating in standby for a certain period of waiting time after reserving a download of content and, when receiving no notification from the radio base station within the waiting time, making a request to the content server for an immediate download of the content to download the reserved content.

55. The mobile terminal claimed in claim 53, wherein the mobile terminal further comprises a means for operating in standby for a certain period of waiting time after reserving a download of content and, when receiving no notification from the radio base station within the waiting time, making a request to the content server for an immediate download of the content to download the reserved content.

56. The mobile terminal claimed in claim 54, wherein the mobile terminal further comprises a means by which a user sets the waiting time, and operates in standby based on the waiting time set by the user.

57. The mobile terminal claimed in claim 55, wherein the mobile terminal further comprises a means by which a user sets the waiting time, and operates in standby based on the waiting time set by the user.

59. The mobile terminal claimed in claim 52, wherein the mobile terminal further comprises a means for sending a request for missing data packets to the radio base station via a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content through downloading performed by the reservation download processing means.

60. The mobile terminal claimed in claim 53, wherein the mobile terminal further comprises a means for sending a request for missing data packets to the radio base station via a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content through downloading performed by the reservation download processing means.

61. The mobile terminal claimed in claim 54, wherein the mobile terminal further comprises a means for sending a request for missing data packets to the radio base station via a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content through downloading performed by the reservation download processing means.

62. The mobile terminal claimed in claim 56, wherein the mobile terminal further comprises a means for sending a request for missing data packets to the radio base station via a prescribed channel to obtain the entire data of the reserved content when the mobile terminal has not received the entire data of the reserved content through downloading performed by the reservation download processing means.

65. The mobile terminal claimed in claim 52, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the mobile terminal further comprises a means for specifying the attribute value and stores it to reserve downloads of contents by category and, when receiving the notification from the radio base station, matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

66. The mobile terminal claimed in claim 53, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the mobile terminal further comprises a means for specifying the attribute value and stores it to reserve downloads of contents by category and, when receiving the notification from the radio base station, matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

67. The mobile terminal claimed in claim 54, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the mobile terminal further comprises a means for specifying the attribute value and stores it to reserve downloads of contents by category and, when receiving the notification from the radio base station, matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

68. The mobile terminal claimed in claim 56, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the mobile terminal further comprises a means for specifying the attribute value and stores it to reserve downloads of contents by category and, when receiving the notification from the radio base station, matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

70. The mobile terminal claimed in claim 59, wherein:

the meta-data of content includes a variety of attribute values as information elements;

the mobile terminal further comprises a means for specifying the attribute value and stores it to reserve downloads of contents by category and, when receiving the notification from the radio base station, matches the meta-data in the notification with the stored attribute value to download the content via the downlink shared channel when the two values match.

72. The mobile terminal claimed in claim 52, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

73. The mobile terminal claimed in claim 53, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

74. The mobile terminal claimed in claim 54, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

75. The mobile terminal claimed in claim 56, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

77. The mobile terminal claimed in claim 59, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

80. The mobile terminal claimed in claim 65, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

63. A mobile terminal which is linked to a radio base station via a radio link, provided with a means for specifying a certain category to reserve downloads of contents by category, and selectively downloads the contents which belong to the specified category via the radio link.

78. The mobile terminal claimed in claim 63, wherein:

the meta-data of content includes a description of copyright information indicating regulations and control specifications for the use of the content; and

the mobile terminal further comprises a means for regulating and controlling the use of the content according to the copyright information after the completion of downloading.

81. A content server comprising:

a content managing means for managing content data and meta-data; and

a data communication section for handling data communication with mobile terminals that are linked to a radio base station on a wireless communication network via radio links;

wherein;

when receiving a request for a reservation download of content from the mobile terminal, the content server sends meta-data of the requested content to the mobile terminal in response; and

when receiving a request for an immediate download of content from the mobile terminal, the content server sends content data and meta-data of the requested content to the mobile terminal in response.

82. A radio base station comprising:

a radio communication section for handling radio communication with mobile terminals that are linked to the radio base station via radio links according to a prescribed multiple accessing method;

a means for assigning a prescribed channel in the radio link to send content on beginning to receive content data and meta-data from a content server; and

a means for notifying the mobile terminals in the radio communication zone of the radio base station about information on the channel;

wherein;

simultaneous downloading is performed by simultaneously sending the content to the mobile terminals in the radio communication zone via the assigned channel after sending the notification.

83. A radio base station comprising:

a radio communication section for handling radio communication with mobile terminals that are linked to the radio base station via radio links according to a prescribed multiple accessing method;

a means for assigning a downlink shared channel to send content on beginning to receive content data and meta-data sent from a content server in response to a request to the content server for an immediate download; and

a means for simultaneously sending notification including the downlink shared channel information and the meta-data of outgoing content to the mobile terminals in the radio communication zone of the radio base station via a broadcast channel;

wherein;

simultaneous downloading is performed by simultaneously sending the content to the mobile terminals in the radio communication zone via the downlink shared channel after sending the notification.

84. The radio base station claimed in claim 83, further comprising a means for, when receiving a request from the mobile terminal for missing data packets of content in the transmission of the content via the downlink shared channel, sending the missing data packets so that the mobile terminal can obtain the entire data of the content.

85. The radio base station claimed in claim 83, further comprising:

a means for receiving a reception completion message indicating that the reception of the content data has been completed from the mobile terminal, and determining a download type adopted by the mobile terminal based on the reception completion message; and

a means for sending information including the determined download type, the reception completion message and the amount of communicated data to an accounting server so that the accounting server can store the information.

86. The radio base station claimed in claim 84, further comprising:

a means for receiving a reception completion message indicating that the reception of the content data has been completed from the mobile terminal, and determining a download type adopted by the mobile terminal based on the reception completion message; and

a means for sending information including the determined download type, the reception completion message and the amount of communicated data to an accounting server so that the accounting server can store the information.

87. A data transmission/reception method for downloading contents from a content server to a plurality of mobile terminals linked to a radio base station via radio links, comprising:

a step in which the first mobile terminal reserves a download of desired content by obtaining and storing meta-data of the content and enters standby mode;

a step in which the content server sends content data and meta-data of content to the second mobile terminal in response to a request from the second mobile terminal;

a step in which the radio base station receives the content data and meta-data of the content from the content server, and assigns a downlink shared channel in the radio link;

a step in which the radio base station sends notification including information on the downlink shared channel and meta-data of the received content to all the mobile terminals in the radio communication zone of the radio base station;

a step in which the first mobile terminal that have received the notification matches the meta-data in the notification with the meta-data stored on the occasion of reserving the download;

a step in which the first mobile terminal tunes in to the informed downlink shared channel when the outgoing content proves coincident with the reserved content;

a step in which the radio base station starts transmitting the content via the downlink shared channel; and

a step in which the first and second mobile terminals receive the content via the downlink shared channel.

89. The data transmission/reception method claimed in claim 87, wherein the first mobile terminal operates in standby for a certain period of waiting time after reserving the download of the content and, when receiving no notification from the radio base station within the waiting time, makes a request to the content server for an immediate download of the content to download the reserved content.

91. The data transmission/reception method claimed in claim 87, wherein the first mobile terminal sends a request for missing data packets to the radio base station through a prescribed channel to obtain the entire data of the content when the mobile terminal has not received the entire data of the content by downloading via the downlink shared channel.

93. The data transmission/reception method claimed in claim 89, wherein the first mobile terminal sends a request for missing data packets to the radio base station through a prescribed channel to obtain the entire data of the content when the mobile terminal has not received the entire data of the content by downloading via the downlink shared channel.

95. The data transmission/reception method claimed in claim 87, further comprising:

a step in which each of the first and second mobile terminals send a reception completion message indicating that the reception of the content data has been completed to the radio base station;

a step in which the radio base station determines a download type adopted by each mobile terminal based on the reception completion message;

a step in which the radio base station sends information including the determined download type, the reception completion message and the amount of communicated data to an accounting server;

a step in which the accounting server stores the information sent from the radio base station as the communication records; and

a step in which the accounting server conducts accounting for mobile terminals according to the download type with reference to the communication records.

97. The data transmission/reception method claimed in claim 89, further comprising:

a step in which each of the first and second mobile terminals send a reception completion message indicating that the reception of the content data has been completed to the radio base station;

a step in which the radio base station determines a download type adopted by each mobile terminal based on the reception completion message;

a step in which the radio base station sends information including the determined download type, the reception completion message and the amount of communicated data to an accounting server;

a step in which the accounting server stores the information sent from the radio base station as the communication records; and

a step in which the accounting server conducts accounting for mobile terminals according to the download type with reference to the communication records.

99. The data transmission/reception method claimed in claim 91, further comprising:

a step in which each of the first and second mobile terminals send a reception completion message indicating that the reception of the content data has been completed to the radio base station;

a step in which the radio base station determines a download type adopted by each mobile terminal based on the reception completion message;

a step in which the radio base station sends information including the determined download type, the reception completion message and the amount of communicated data to an accounting server;

a step in which the accounting server stores the information sent from the radio base station as the communication records; and

a step in which the accounting server conducts accounting for mobile terminals according to the download type with reference to the communication records.

101. The data transmission/reception method claimed in claim 87, further comprising:

a step in which the third mobile terminal specifies an attribute value in the meta-data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

103. The data transmission/reception method claimed in claim 89, further comprising:

a step in which the third mobile terminal specifies an attribute value in the meta-data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

105. The data transmission/reception method claimed in claim 91, further comprising:

a step in which the third mobile terminal specifies an attribute value in the meta-data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

107. The data transmission/reception method claimed in claim 95, further comprising:

a step in which the third mobile terminal specifies an attribute value in the meta-data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

109. The data transmission/reception method claimed in claim 87, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

111. The data transmission/reception method claimed in claim 89, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

113. The data transmission/reception method claimed in claim 91, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

115. The data transmission/reception method claimed in claim 95, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

117. The data transmission/reception method claimed in claim 101, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

88. A data transmission/reception method for downloading contents from a content server to a plurality of mobile terminals linked to a radio base station via radio links, comprising:

a step in which the first mobile terminal reserves a download by making a request to the content server for a reservation download of desired content to obtain and store meta-data of the content, and enters standby mode;

a step in which the content server receives a request for an immediate download of content from the second mobile terminal, and sends content data and meta-data of the content to the second mobile terminal in response;

a step in which the radio base station receives the content data and meta-data of the content sent from the content server in response to the immediate download request, and assigns a downlink shared channel for the second mobile terminal;

a step in which the radio base station simultaneously sends notification including information on the downlink shared channel and meta-data of the received content to all the mobile terminals in the radio communication zone of the radio base station via a broadcast channel;

a step in which the first mobile terminal that have received the notification matches the meta-data in the notification with the meta-data stored on the occasion of reserving the download;

a step in which the first mobile terminal tunes in to the informed downlink shared channel when two meta-data match;

a step in which the radio base station starts transmitting the content data and meta-data via the downlink shared channel; and

a step in which the first and second mobile terminals receive the content data via the downlink shared channel.

90. The data transmission/reception method claimed in claim 88, wherein the first mobile terminal operates in standby for a certain period of waiting time after reserving the download of the content and, when receiving no notification from the radio base station within the waiting time, makes a request to the content server for an immediate download of the content to download the reserved content.

92. The data transmission/reception method claimed in claim 88, wherein the first mobile terminal sends a request for missing data packets to the radio base station through a prescribed channel to obtain the entire data of the content when the mobile terminal has not received the entire data of the content by downloading via the downlink shared channel.

94. The data transmission/reception method claimed in claim 90, wherein the first mobile terminal sends a request for missing data packets to the radio base station through a prescribed channel to obtain the entire data of the content when the mobile terminal has not received the entire data of the content by downloading via the downlink shared channel.

96. The data transmission/reception method claimed in claim 88, further comprising:

a step in which each of the first and second mobile terminals send a reception completion message indicating that the reception of the content data has been completed to the radio base station;

a step in which the radio base station determines a download type adopted by each mobile terminal based on the reception completion message;

a step in which the radio base station sends information including the determined download type, the reception completion message and the amount of communicated data to an accounting server;

a step in which the accounting server stores the information sent from the radio base station as the communication records; and

a step in which the accounting server conducts accounting for mobile terminals according to the download type with reference to the communication records.

98. The data transmission/reception method claimed in claim 90, further comprising:

a step in which each of the first and second mobile terminals send a reception completion message indicating that the reception of the content data has been completed to the radio base station;

a step in which the radio base station determines a download type adopted by each mobile terminal based on the reception completion message;

a step in which the radio base station sends information including the determined download type, the reception completion message and the amount of communicated data to an accounting server;

a step in which the accounting server stores the information sent from the radio base station as the communication records; and

a step in which the accounting server conducts accounting for mobile terminals according to the download type with reference to the communication records.

100. The data transmission/reception method claimed in claim 92, further comprising:

a step in which each of the first and second mobile terminals send a reception completion message indicating that the reception of the content data has been completed to the radio base station;

a step in which the radio base station determines a download type adopted by each mobile terminal based on the reception completion message;

a step in which the radio base station sends information including the determined download type, the reception completion message and the amount of communicated data to an accounting server;

a step in which the accounting server stores the information sent from the radio base station as the communication records; and

a step in which the accounting server conducts accounting for mobile terminals according to the download type with reference to the communication records.

102. The data transmission/reception method claimed in claim 88, further comprising:

a step in which the third mobile terminal specifies an attribute value in the mete data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

104. The data transmission/reception method claimed in claim 90, further comprising:

a step in which the third mobile terminal specifies an attribute value in the meta-data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

106. The data transmission/reception method claimed in claim 92, further comprising:

a step in which the third mobile terminal specifies an attribute value in the meta-data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

108. The data transmission/reception method claimed in claim 96, further comprising:

a step in which the third mobile terminal specifies an attribute value in the meta-data and stores it to reserve downloads of contents by category; and

a step in which, when receiving the notification from the radio base station, the third mobile terminal matches the meta-data in the notification with the stored attribute value, and downloads the content via the downlink shared channel when the two values match.

110. The data transmission/reception method claimed in claim 88, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

112. The data transmission/reception method claimed in claim 90, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

114. The data transmission/reception method claimed in claim 92, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

116. The data transmission/reception method claimed in claim 96, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.

118. The data transmission/reception method claimed in claim 102, further comprising a step in which the mobile terminal regulates and controls the use of the content based on a description of copyright information indicating regulations and control specifications for the use of the content included in the meta-data of the content after the completion of downloading.