Mobile Device and Radio Interface Arrangement Method

• US 20080039015A1
• Filed: 02/21/2005
• Published: 02/14/2008
• Est. Priority Date: 02/23/2004
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Nakata, Tsuneo, Nishio, Makoto, Arutaki, Akira
• Granted Patent: US 7,904,085 B2
• Time in Patent Office: Days
• US Class Current: 455/39
• CPC Class Codes: H04B 7/08 at the receiving station
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data

Abstract

A transmitter/receiver 101 on a mobile body 10 utilizes a plurality of antennas 100. It is assumed that a plurality of the antennas 100 are distributed and arranged in a moving direction of the mobile body, and the antennas at both ends are away from each other at an extent that a distance between the antennas is not negligible as compared with an interval of the base station. A radio wave from the base station 102-1 is stronger in intensity in 100-1 than in the center, and the radio wave from the base station 102-2 is stronger in intensity in 100-2 than in the center, respectively, whereby the communication stabilization effect, which is larger as compared with the case that the antennas are locally located in the center, is expected. This enables the interval of the base station, which is broader than the conventional one, to be employed, yet both of a speed and a frequency of a hand-over process to be lowered, and in addition hereto, the bandwidth utilization efficiency, which is higher as compared with that of the conventional example, to be realized.

Claims

1-22. -22. (canceled)

23. A mobile device having wireless antennas in a wireless communication network having a plurality of base stations, characterized in including:

two or more antennas installed separately at an extent that the base station of which radio wave intensity becomes maximum differs antenna by antenna in a case where the mobile device has stood still in the vicinity of a boundary of wireless areas;

a communication means for simultaneously utilizing said two or more antennas, thereby to simultaneously make communication with a plurality of the base stations;

means for detecting a transmission/reception state of each antenna; and

means for performing a hand-over process based upon difference of said transmission/reception state of each of said antennas.

24. The mobile device according to claim 23, characterized in that said mobile device is a vehicle.

25. The mobile device according to claim 23, characterized in that said mobile device is a train.

26. The mobile device according to claim 23, characterized in that said mobile device is a ship.

27. The mobile device according to claim 23, characterized in raising a communication reliability by, in a case where a set of base stations with which communication is possible via the antenna differ antenna by antenna, making communication with respective separate base stations.

28. A mobile device having wireless antennas in a wireless communication network having a plurality of base stations, characterized in including:

two or more antennas installed separately at an extent that the base station of which a communication quality becomes most excellent differs antenna by antenna in a case where the mobile device has stood still in the vicinity of a boundary of wireless areas;

a communication means for simultaneously utilizing said two or more antennas, thereby to simultaneously make communication with a plurality of the base stations;

means for detecting a transmission/reception state of each antenna; and

means for performing a hand-over process based upon difference of said transmission/reception state of each of said antennas.

29. The mobile device according to claim 28, characterized in that said mobile device is a vehicle.

30. The mobile device according to claim 28, characterized in that said mobile device is a train.

31. The mobile device according to claim 28, characterized in that said mobile device is a ship.

32. The mobile device according to claim 28, characterized in raising a communication reliability by, in a case where a set of base stations with which communication is possible via the antenna differ antenna by antenna, making communication with respective separate base stations.

33. A mobile device having wireless antennas in a wireless communication network having a plurality of base stations, characterized in including:

two or more antennas installed separated at an extent that the base station of which a communication quality becomes most excellent differs antenna by antenna in a case where the mobile device has stood still in the vicinity of a boundary of wireless areas;

two or more transmission/reception means mounted responding to each of said antennas;

a communication means for simultaneously utilizing said two or more antennas and said two or more transmission/reception means, thereby to simultaneously make communication with a plurality of the base stations;

means for detecting a transmission/reception state of each antenna; and

means for performing a hand-over process based upon said transmission/reception state of each of said antennas.

34. The mobile device according to claim 33, characterized in that said mobile device is a vehicle.

35. The mobile device according to claim 33, characterized in that said mobile device is a train.

36. The mobile device according to claim 33, characterized in that said mobile device is a ship.

37. The mobile device according to claim 33, characterized in raising a communication reliability by, in a case where a set of base stations with which communication is possible via the antenna differ antenna by antenna, making communication with respective separate base stations.

38. A method of arranging wireless interfaces, characterized in including the steps of:

arranging two or more antennas separately at an extent that the base station of which a communication quality becomes most excellent antenna by antenna in a case where a mobile device has stood still in the vicinity of a boundary of wireless areas;

mounting two or more transmission/reception means correspondingly to each antenna; and

arranging wireless interfaces so that said two or more antennas and said two or more transmission/reception means are simultaneously utilized, thereby to simultaneously make communication with a plurality of the base stations and performing a hand-over process based upon difference of said transmission/reception state of each of said antennas.

39. A hand-over method of mobile telecommunications, characterized in including the steps of:

detecting a difference of transmission/reception state of two or more antennas mounted separately on a mobile body at an extent that a base station of which radio wave intensity becomes maximum differs antenna by antenna in a case where the mobile body has stood still in the vicinity of a boundary of wireless areas; and

performing a hand-over process to the base station of the antenna where the radio wave intensity becomes strong with movement.

40. A hand-over method of mobile telecommunications, characterized in including the steps of:

detecting a difference of transmission/reception state oftwo or more antennas mounted separately on a mobile body at an extent that a base station of which a communication quality becomes most excellent differs antenna by antenna in a case where the mobile body has stood still in the vicinity of a boundary of wireless areas; and

performing a hand-over process to the base station of the antenna where the radio wave intensity becomes strong with movement.