MOBILE COMMUNICATION METHOD

• US 20130171995A1
• Filed: 04/03/2012
• Published: 07/04/2013
• Est. Priority Date: 04/04/2011
• Status: Active Grant

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Corporation
• Inventors: FUJISHIRO, Masato, FUKUTA, Noriyoshi, ADACHI, Hiroyuki, INAKOSHI, Atsuhisa, YAMAZAKI, Chiharu
• Granted Patent: US 8,744,450 B2
• Time in Patent Office: Days
• US Class Current: 455/441
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0864 of different hierarchy levels, e.g. Master Evolved Node B [MeNB] or Secondary Evolved node B [SeNB]
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/165 for reducing network power consumption H04W36/18 - H04W36/22 take precedence
• CPC Class Codes: H04W 36/324 by mobility data, e.g. speed data
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

A radio terminal UE according to one embodiment includes a radio communication unit 210 configured to receive a plurality of parameters including a first parameter for high-speed movement and a second parameter for non-high-speed movement as parameters for processing for switching to a neighboring base station from a base station connected to the radio terminal, and a controller 260 configured to acquire movement speed information indicating a movement speed of the radio terminal and to select a parameter corresponding to the movement speed information. The first parameter is configured to inhibit processing for switching to a Pico base station PeNB which is included in the neighboring base stations.

Claims

1. A mobile communication method comprising the steps of:

notifying, by a base station connected to a radio terminal for communications or stand-by, the radio terminal of a plurality of parameters including a first parameter for high-speed movement and a second parameter for non-high-speed movement as parameters for processing for switching to any of neighboring base stations;

acquiring, by the radio terminal, movement speed information indicating a movement speed of the radio terminal; and

selecting, by the radio terminal, a parameter corresponding to the movement speed information from the plurality of parameters notified by the base station, wherein

the first parameter is configured to inhibit processing for switching to a low-power base station which is included in the neighboring base stations.

2. A mobile communication method comprising the steps of:

notifying, by a base station connected to a radio terminal for communications or stand-by, the radio terminal of a parameter for processing for switching to a neighboring base station;

acquiring, by the radio terminal, movement speed information indicating a movement speed of the radio terminal; and

adjusting, by the radio terminal, the parameter notified by the base station on the basis of the movement speed information, wherein

the radio terminal adjusts the parameter notified by the base station to inhibit processing for switching to a low-power base station which is included in the neighboring base stations when the movement speed information indicates high-speed movement.

3. A mobile communication method comprising the steps of:

acquiring, by a base station connected to a radio terminal, movement speed information indicating a movement speed of the radio terminal;

selecting, by the base station, a parameter corresponding to the movement speed information from a plurality of parameters including a first parameter for high-speed movement and a second parameter for non-high-speed movement as parameters for processing for handover to any of neighboring base stations; and

notifying, by the base station, the radio terminal of the parameter selected in the selecting step, wherein

the first parameter is configured to inhibit processing for handover to a low-power base station which is included in the neighboring base stations.

4. A mobile communication method comprising the steps of:

reporting, from a radio terminal to a base station connected to the radio terminal, measurement information on a measurement result of a received signal from at least one of the base station and each neighboring base station;

acquiring, by the base station, movement speed information indicating a movement speed of the radio terminal; and

transmitting, from the base station to a low-power base station, a handover request for requesting an admission of the radio terminal when the measurement information reported from the radio terminal satisfies a handover condition to the low-power base station which is included in the neighboring base stations, wherein

the base station halts transmission of the handover request to the low-power base station when the measurement information reported from the radio terminal satisfies the handover condition to the low-power base station and the movement speed information indicates high-speed movement.

5. The mobile communication method according to claim 4 further comprising the step of instructing, by the base station, the radio terminal to halt processing for a measurement of a received signal from the low-power base station when the movement speed information indicates high-speed movement.

6. A mobile communication method comprising the steps of:

reporting, from a radio terminal to a base station connected to the radio terminal, measurement information on a measurement result of a received signal from at least one of the base station and each neighboring base station;

acquiring, by the base station, movement speed information indicating a movement speed of the radio terminal; and

transmitting, from the base station to a low-power base station which is included in the neighboring base stations, a handover request for requesting an admission of the radio terminal on the basis of the measurement information reported from the radio terminal, wherein

the base station transmits the handover request including high-speed movement information when the movement speed information indicates high-speed movement.

7. The mobile communication method according to claim 6 further comprising the steps of:

receiving the handover request by the low-power base station; and

rejecting the handover request by the low-power base station when the handover request includes the high-speed movement information.

8. The mobile communication method according to claim 6 further comprising the step of instructing, by the base station, the radio terminal to halt processing for a measurement of a received signal from the low-power base station when the movement speed information indicates high-speed movement.

9. A mobile communication method comprising the steps of:

receiving, by a low-power base station, a handover request for requesting an admission of a radio terminal from a neighboring base station;

requesting, by the low-power base station, a core network for movement speed information indicating a movement speed of the radio terminal;

acquiring, by the low-power base station, the movement speed information from the core network; and

transmitting, from the low-power base station to the neighboring base station, a response to the handover request, wherein

the low-power base station rejects the handover request when the movement speed information from the core network indicates high-speed movement.

10. A mobile communication method comprising the steps of:

measuring, by a radio terminal, a received signal from at least one of a base station connected to the radio terminal and each neighboring base station;

acquiring, by the radio terminal, movement speed information indicating a movement speed of the radio terminal; and

reporting, from the radio terminal to the base station, measurement information on a measurement result obtained in the measuring step, wherein

when predetermined measurement information on a measurement result of a received signal from a low-power base station is obtained by the measurement and when the movement speed information indicates high-speed movement, the radio terminal reports the measurement information from which the predetermined measurement information is excluded.

11. A mobile communication method comprising the steps of:

receiving, by a base station connected to a radio terminal, measurement information on a measurement result of a received signal from at least one of the base station and each neighboring base station from the radio terminal;

acquiring, by the base station, movement speed information indicating a movement speed of the radio terminal; and

determining, by the base station, a handover target of the radio terminal on the basis of the measurement information received from the radio terminal, wherein

when predetermined measurement information on a measurement result of a received signal from a low-power base station is included in the measurement information and when the movement speed information indicates high-speed movement, the base station decides the handover target of the radio terminal after excluding the predetermined measurement information which is included in the measurement information.