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AssigneeFujitsu Semiconductor Limited
InventorTadashi Nakamura
Estimating the term…
A wireless station includes a first wireless communication circuit, a second wireless communication circuit, and a control circuit. The first wireless communication circuit communicates by a first wireless communication system in a first cell which includes a first service area, and the second wireless communication circuit communicates by a second wireless communication system in a second cell which includes a second service area narrower than the first service area. The control circuit switches a communication system between the first wireless communication system and the second wireless communication system to control communication. When switching the communication system between the first wireless communication system and the second wireless communication system, the control circuit controls the first wireless communication circuit and the second wireless communication circuit to set a communication system which is used before the switching to an idle.
A wireless station comprising:
A semiconductor device comprising:
A wireless communication system comprising:
A method for controlling a wireless communication system including a first wireless station configured to communicate by a first wireless communication system in a first cell which includes a first service area, a second wireless station configured to communicate by a second wireless communication system in a second cell which includes a second service area narrower than the first service area, and a third wireless station configured to communicate with either of the first and second wireless stations, the method comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Hand-off or reselection arrangements: reselecting a cell layer in multi-layered cells
Over a different radio air interface technology: between licensed networks
Manipulation of established connections: transitions between radio resource control [RRC] states
Wireless communication networks
About 6 years 11 months of term left · ends 24 Sep 2033 (estimated)
This application is based upon and claims the benefit of priority of the prior Japanese Patent Application No. 2012-212387, filed on Sep. 26, 2012, the entire contents of which are incorporated herein by reference.
The embodiments discussed herein are related to a wireless station, a semiconductor device, a wireless communication system, and a method for controlling the same.
In recent years, a mobile terminal which continues data communications (communications) while switching between a narrow area communication system (small cell) such as LTE (Long Term Evolution) and a wide area communication system such as WCDMA (Wideband Code Division Multiplexing Access) (large cell) has been put in practical use.
FIG. 1 is a drawing for describing an example of a control method of a wireless communication system when a mobile terminal moves between a plurality of communication systems;
FIG. 2 is a drawing for describing a problem in FIG. 1;
FIG. 3 is a functional block diagram depicting an example of the present embodiment;
First, before describing embodiments of a wireless station, a semiconductor device, a wireless communication system, and a method for controlling the same in detail, description will be made for a case in which a mobile terminal switches wireless communication systems and problems at the switching with reference to FIG. 1 and FIG. 2.
The data communication (communication) of a mobile terminal (MS) is performed while switching usable wireless communication systems in a service area in which the mobile terminal MS is located, for example. In other words, at the service area in which the mobile terminal MS is located, communication may be made by switching to a cheapest and high-speed wireless communication system, for example.
The present specification uses LTE and WiMAX as examples of a narrow area communication system (small cell), and uses WCDMA, CDMA2000, GPRS, and GSM (registered trademark) as examples of a wide area communication system (large cell). However, the embodiments are not limited to such examples.