Mobile terminal

• US 20060009211A1
• Filed: 10/27/2004
• Published: 01/12/2006
• Est. Priority Date: 06/16/2004
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Sato, Toshihiko
• Granted Patent: US 7,627,319 B2
• Time in Patent Office: Days
• US Class Current: 455/423
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The invention relates to a mobile terminal that intends to increase channel capacity and transmission quality properly within the confines of costs. The invention provides a mobile terminal including measuring section measuring a downstream transmission loss using a pilot signal transmitted from each radio base station; and selecting section comparing transmitting power of a pilot signal corresponding to the lowest measured transmission loss with transmitting power of pilot signals for each of which a difference between a corresponding measured transmission loss and a lowest measured transmission loss is smaller than a prescribed value, and selecting, as an origination destination or handover destination, a radio base station that transmits a pilot signal having a lowest transmitting power among those pilot signals, if a difference between the lowest measured transmission loss and a second lowest measured transmission loss is not larger than or equal to a prescribed value.

Claims

1. A mobile terminal which is used in a mobile communication system in which a plurality of wireless zones is formed by a plurality of radio base stations, comprising:

a measuring section measuring a downstream transmission loss using a pilot signal that is transmitted from each of the radio base stations; and

a selecting section comparing transmitting power of a pilot signal corresponding to a lowest measured transmission loss with transmitting power of pilot signals for each of which a difference between a corresponding measured transmission loss and said lowest measured transmission loss is smaller than a prescribed value, and the selecting section selecting, as an origination destination or handover destination, a radio base station that transmits a pilot signal having a lowest transmitting power among said pilot signals, when a difference between said lowest measured transmission loss and a second lowest measured transmission loss is not larger than or equal to a prescribed value.

2. A mobile terminal which is used in a mobile communication system in which a plurality of wireless zones is formed by a plurality of radio base stations, comprising:

a first measuring section measuring a reception level of a pilot signal that is transmitted from each of the radio base stations;

a second measuring section measuring a downstream transmission loss using said pilot signal; and

a base station selecting section selecting a radio base station that transmits a pilot signal corresponding to a highest reception level as a downstream signal transmission base station on the basis of measurement results of said first measuring section, and selecting a radio base station that transmits a pilot signal corresponding to a lowest transmission loss as an upstream signal reception base station on the basis of measurement results of said second measuring section.

3. A mobile terminal which is used in a mobile communication system in which a plurality of wireless zones is formed by a plurality of radio base stations, comprising:

a measuring section measuring a downstream transmission loss using a pilot signal that is transmitted from each of the radio base stations; and

a selecting section determining transmitting power of a particular pilot signal corresponding to a lowest measured transmission loss and transmitting power of pilot signals for each of which a difference between a corresponding measured transmission loss and said lowest measured transmission loss is smaller than a prescribed value, and the selecting section selecting, as an origination destination or handover destination, a radio base station that transmits a pilot signal corresponding to a low measured transmission loss among said pilot signals for each of which a ratio of a relative transmission loss with respect to said lowest measured transmission loss to a relative transmitting power with respect to said transmitting power of said particular pilot signal is larger than a predetermined threshold value.

4. A mobile terminal which is used in a mobile communication system in which a plurality of wireless zones is formed by a plurality of radio base stations, comprising:

a measuring section measuring a downstream transmission loss using a pilot signal that is transmitted from each of the radio base stations; and

a selecting section determining transmitting power of a particular pilot signal corresponding to a lowest measured transmission loss and transmitting power of pilot signals for each of which a difference between a corresponding measured transmission loss and said lowest measured transmission loss is smaller than a prescribed value, and the selecting section selecting, as an origination destination or handover destination, a radio base station that transmits a pilot signal corresponding to a low measured transmission loss among said pilot signals for each of which a ratio of a relative transmission loss with respect to said lowest measured transmission loss to a relative transmitting power with respect to said transmitting power of said particular pilot signal is larger than a predetermined threshold value, said radio base station being able to secure transmitting power that is desired to be applied to a downstream link of a traffic channel in accordance with said measured transmission loss within the confines of remaining resources.