Radio communication system, radio terminal, base station, and base station search method
First Claim
1. A wireless communication system that includes a wireless terminal and a plurality of base stations, in which the plurality of base stations can communicate with each other via a predetermined communication path that is different from a wireless communication channel used to communicate with the wireless terminal, whereinthe wireless terminal includesa request signal transmission unit operable to transmit, to one base station among the plurality of base stations, a request signal for requesting a response signal from one or more other base stations among the plurality of base stations, anda response signal reception unit operable to receive the response signal transmitted from the one or more other base stations on a predetermined channel,the one base station includesa request signal reception unit operable to receive the request signal from the wireless terminal, anda request signal transfer unit operable to transfer the request signal received by the request signal reception unit to the one or more other base stations via the predetermined communication path, andthe one or more other base stations includea response signal transmission unit operable to transmit the response signal to the wireless terminal on the predetermined channel upon receiving the request signal transmitted from the one base station, whereinthe one base station is connected, via the predetermined communication path, to the plurality of base stations that include the one or more other base stations,the wireless terminal further includesa storage unit operable to store therein identification information for identifying each of the plurality of base stations, anda selection unit operable to select the one or more other base stations from among the plurality of base stations with reference to the identification information, whereinthe request signal transmission unit transmits identification information pertaining to the one or more other base stations selected by the selection unit by including the information in the request signal, andthe request signal transfer unit transfers the request signal to the one or more other base stations identified by the identification information included in the request signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless communication system includes a wireless terminal and a plurality of base stations that can communicate with each other via a predetermined communication path that is different from the wireless communication path to the wireless terminal. The wireless terminal transmits a request signal to one of the base stations to request a response signal from another base station. The one base station transfers the received request signal to the other base station via the predetermined communication path. Upon reception of the request signal transferred from the one base station, the second base station transmits a response signal to the wireless terminal via the predetermined channel. The wireless terminal receives the response signal transmitted from the second base station via the predetermined channel.
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Citations
10 Claims
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1. A wireless communication system that includes a wireless terminal and a plurality of base stations, in which the plurality of base stations can communicate with each other via a predetermined communication path that is different from a wireless communication channel used to communicate with the wireless terminal, wherein
the wireless terminal includes a request signal transmission unit operable to transmit, to one base station among the plurality of base stations, a request signal for requesting a response signal from one or more other base stations among the plurality of base stations, and a response signal reception unit operable to receive the response signal transmitted from the one or more other base stations on a predetermined channel, the one base station includes a request signal reception unit operable to receive the request signal from the wireless terminal, and a request signal transfer unit operable to transfer the request signal received by the request signal reception unit to the one or more other base stations via the predetermined communication path, and the one or more other base stations include a response signal transmission unit operable to transmit the response signal to the wireless terminal on the predetermined channel upon receiving the request signal transmitted from the one base station, wherein the one base station is connected, via the predetermined communication path, to the plurality of base stations that include the one or more other base stations, the wireless terminal further includes a storage unit operable to store therein identification information for identifying each of the plurality of base stations, and a selection unit operable to select the one or more other base stations from among the plurality of base stations with reference to the identification information, wherein the request signal transmission unit transmits identification information pertaining to the one or more other base stations selected by the selection unit by including the information in the request signal, and the request signal transfer unit transfers the request signal to the one or more other base stations identified by the identification information included in the request signal.
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6. A wireless communication system that includes a wireless terminal and a plurality of base stations, in which the plurality of base stations can communicate with each other via a predetermined communication path that is different from a wireless communication channel to the wireless terminal, wherein
the wireless terminal includes a request signal transmission unit operable to transmit, to one base station among the plurality of base stations, a request signal for requesting a response signal from one or more other base stations among the plurality of base stations, and a response signal reception unit operable to receive the response signal transmitted from the one or more other base stations on a predetermined channel, the one base station includes a request signal reception unit operable to receive the request signal from the wireless terminal, and a request signal transfer unit operable to transfer the request signal received by the request signal reception unit to the one or more other base stations via the predetermined communication path, and the one or more other base stations include a response signal transmission unit operable to transmit the response signal to the wireless terminal on the predetermined channel upon receiving the request signal transmitted from the one base station, wherein the one base station is connected, via the predetermined communication path, to a plurality of base stations that include the one or more other base stations, the one base station further includes a storage unit operable to store identification information for identifying each of the plurality of base stations, and a selection unit operable to select the one or more other base stations from among the plurality of base stations with reference to the identification information, wherein the request signal transfer unit transfers the request signal to the one or more other base stations selected by the selection unit.
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10. A wireless communication system that includes a wireless terminal and a plurality of base stations, in which the plurality of base stations can communicate with each other via a predetermined communication path that is different from a wireless communication channel to the wireless terminal, wherein
the wireless terminal includes a request signal transmission unit operable to transmit, to one base station among the plurality of base stations, a request signal for requesting a response signal from one or more other base stations among the plurality of base stations, and a response signal reception unit operable to receive the response signal transmitted from the one or more other base stations on a predetermined channel, the one base station includes a request signal reception unit operable to receive the request signal from the wireless terminal, and a request signal transfer unit operable to transfer the request signal received by the request signal reception unit to the one or more other base stations via the predetermined communication path, and the one or more other base stations include a response signal transmission unit operable to transmit the response signal to the wireless terminal on the predetermined channel upon receiving the request signal transmitted from the one base station, wherein the wireless terminal further includes a judgment unit operable to judge whether performing handover processing is necessary, a base station determination unit operable to, in a case that the one or more other base stations are a plurality of other base stations, determine one other base station from among the plurality of other base stations in accordance with the response signals received by the response signal reception unit, and a handover petition unit operable to petition that handover be performed to the other base station determined by the base station determination unit, wherein the request signal transmission unit transmits the request signal if the judgment unit has judged that the handover processing is necessary, and each of the plurality of other base stations further include a handover processing unit operable to perform handover processing for establishing a wireless connection with the wireless terminal upon receiving a handover petition from the wireless terminal.
Specification