Radio network controller, mobile station, and mobile communication method

Abstract

A radio network controller comprises a cell selector configured to select a cell to use by a mobile station after data reception, and a mobile station controller configured to control the mobile station to communicate by radio using the cell selected by the cell selector after the data reception.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is based upon and claims the benefit of priority from prior Japanese Patent Applications No. 2004-233889, filed on Aug. 10, 2004, No. 2004-278310, filed on Sep. 24, 2004, and No. 2005-41415, filed on Feb. 17, 2005; the entire contents of which are incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a radio network controller, a mobile station, and a mobile communication method. [0004] 2. Description of the Related Art [0005] Conventionally, a service (Multimedia Broadcast Multicast Service, hereinafter, referred to as an “MBMS”) has been provided, in which multimedia contents are broadcasted or multicasted to plural mobile stations (3GPP TSG-RAN, “TS25.346 V6.1.0 Introduction of Multimedia broadcast multicast service (MBMS) in Radio access network (RAN)”, June, 2004). In the MBMS, a frequency at which data is transmitted by the MBMS is no...

AI Technical Summary

Benefits of technology

[0007] An object of the present invention is to prevent traffic from concentrating after data reception and to effectively utilize radio resources.

[0009] The radio network controller can select a cell that the mobile station uses after data reception and make the mobile station to use the selected cell. Therefore the radio network controller can prevent traffic from concentrating and effectively utilize the radio resources by distributing mobile stations to plural cells after data reception.

[0011] The mobile station can select a cell that the mobile station uses after data reception and communicate by radio using the selected cell after data reception. Therefore, the mobile stations can be distributed to plural cells after data reception. As a result, the mobile station can prevent traffic from concentrating and effectively utilize radio resources.

Problems solved by technology

However, the mobile station that has started to use a specific frequency at which data is transmitted through the MBMS continues to be present at the frequency also after data reception through the MBMS unless the communication quality at the frequency is deteriorated.

Such a problem arises not only in the MBMS, but also, for example, when the mobile station receives data to be transmitted by using a specific frequency such as a case of a high speed downlink packet access (HSDPA) etc or the like.

Concentration of the traffic on one part of the frequencies as described above brings about a waste in utilizing radio resources.

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