Wireless base station, mobile station, wireless communication system, control method for wireless base station, and recording medium

Patent metadata

Field	Value
Publication number	US-10420026-B2
Application number	US-201515509576-A
Country	US
Kind code	B2
Filing date	Sep 3, 2015
Priority date	Sep 30, 2014
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

A wireless base station includes: a communication unit 101 configured to communicate with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells; an acquisition unit 102 configured to acquire load information related to a load of a network including a wireless base station forming the cell; and a control unit 103 . The control unit 103 receives information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit, determines a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit, and notifies the signal determined to be measured to the mobile station via the communication unit.

First claim

What is claimed is:

1. A wireless base station comprising:
a communication unit configured to communicate with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells;
an acquisition unit configured to acquire load information related to a load of a network including a wireless base station forming the each cell; and
a control unit configured to receive information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station via the communication unit,
determine a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the information received, and the load information acquired by the acquisition unit,
transmits, to the mobile station via the communication unit, a message indicating a frequency band of the signal to be measured and information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, or a message indicating information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, and
notify the signal determined to be measured to the mobile station via the communication unit,

wherein the signal transmitted in each of the plurality of cells includes a signal from each of the plurality of cells connected to the mobile station.

2. A mobile station comprising:
a battery;
a communication unit configured to communicate with a wireless base station;
a measuring unit configured to measure radio quality of a signal transmitted in each of a plurality of cells; and
a control unit configured to transmit, to the wireless base station via the communication unit, information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells, obtained by the measuring unit, and a state of the battery of the mobile station, and,
upon being notified a signal, the radio quality of which is to be measured, from the wireless base station via the communication unit, causes the measuring unit to measure the radio quality of the notified signal,

wherein the signal transmitted in each of the plurality of cells includes a signal from each of the plurality of cells connected to the mobile station, and
wherein upon receiving, via the communication unit, a message indicating a frequency band of the signal to be measured and information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, or a message indicating information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, the control unit causes the measuring unit to measure the frequency band of the signal to be measured or releases the connection to the cell in which the signal that is not to be measured.

3. A control method for a wireless base station, the method comprising:
communicating with a mobile station which measures radio quality of a signal transmitted in each of a plurality of cells;
acquiring load information related to a load of a network including a wireless base station forming the each cell;
receiving information indicating a measurement result of the radio quality of the signal transmitted in each of the plurality of cells and a state of a battery of the mobile station, from the mobile station;
determining a signal, radio quality of which is to be measured by the mobile station, based on the measurement results of the radio qualities and the state of the battery of the mobile station, indicated in the received information, and the load information acquired by the acquisition unit;
transmitting, to the mobile station via the communication unit, a message indicating a frequency band of the signal to be measured and information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, or a message indicating information that connection to a cell in which a signal that is not to be measured is transmitted is to be released, and
notifying the signal determined to be measured to the mobile station,
wherein the signal transmitted in each of the plurality of cells includes a signal from each of the plurality of cells connected to the mobile station.

Assignees

• Nec Corp

Inventors

• Tamura Tomu
• Ueda Yoshio

Classifications

• H04W52/0277

  according to available power supply, e.g. switching off when a low battery condition is detected · CPC title

• H04W48/08

  Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) · CPC title

• H04W48/06

  based on traffic conditions · CPC title

• H04W52/02

  Power saving arrangements · CPC title

• H04W72/542

  using measured or perceived quality · CPC title