Communication system, communication control method, mobile terminal, and relay device
First Claim
Patent Images
1. A communication system comprising:
- a mobile terminal;
one or more communication devices; and
a base station for communicating with at least one of the mobile terminal and one or more communication devices, whereinthe mobile terminal includesa receiver configured to receive at least one of a first reference signal and a second reference signal transmitted from the one or more communication devices; and
circuitry configured to identify a communication device based on the at least one of the first reference signal and the second reference signal received by the receiver from the one or more communication devices,each of the one or more communication devices transmits the first reference signal according to a first cycle when operating in a power save mode and transmits the second reference signal according to a second cycle when operating in an active mode, the first cycle being longer than the second cycle, andthe base station includescircuitry configured to select a communication device among the one or more communication devices, and issue an instruction to shift to the active mode in a case the selected communication device is operating in the power save mode.
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Abstract
A communication system is configured that includes a mobile terminal, one or more relay devices, and a base station for communicating with the mobile terminal via any of the one or more relay devices, where the mobile terminal includes a reception unit for receiving a reference signal transmitted from the one or more relay devices, a determination unit for determining a relay device to be used for communication with the base station based on the reference signal received by the reception unit from the one or more relay devices, and a transmission unit for transmitting to the base station information indicating the relay device determined by the determination unit.
16 Citations
31 Claims
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1. A communication system comprising:
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a mobile terminal; one or more communication devices; and a base station for communicating with at least one of the mobile terminal and one or more communication devices, wherein the mobile terminal includes a receiver configured to receive at least one of a first reference signal and a second reference signal transmitted from the one or more communication devices; and circuitry configured to identify a communication device based on the at least one of the first reference signal and the second reference signal received by the receiver from the one or more communication devices, each of the one or more communication devices transmits the first reference signal according to a first cycle when operating in a power save mode and transmits the second reference signal according to a second cycle when operating in an active mode, the first cycle being longer than the second cycle, and the base station includes circuitry configured to select a communication device among the one or more communication devices, and issue an instruction to shift to the active mode in a case the selected communication device is operating in the power save mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A communication control method comprising:
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receiving, by a mobile terminal, at least one of a first reference signal and a second reference signal transmitted from one or more communication devices; determining a communication device based on the at least one of the first reference signal and the second reference signal received from the one or more communication devices, wherein each of the one or more communication devices transmits the first reference signal according to a first cycle when operating in a power save mode and transmits the second reference signal according to a second cycle when operating in an active mode, the first cycle being longer than the second cycle; and issuing an instruction to the determined communication device to shift to the active mode in a case the determined communication device is operating in the power save mode.
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9. A mobile terminal comprising:
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a receiver configured to receive at least one of a first reference signal and a second reference signal transmitted from one or more communication devices, wherein each of the one or more communication devices transmits the first reference signal according to a first cycle when operating in a power save mode and transmits the second reference signal according to a second cycle when operating in an active mode, the first cycle being longer than the second cycle. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A communication device, comprising:
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a communication interface configured to communicate with at least one of a base station and a mobile terminal; and circuitry configured to set an operation mode of the communication device to a power save mode in which the communication device transmit a first reference signal according to a first cycle or an active mode in which the communication device transmits a second reference signal according to a second cycle, the first cycle being longer than the second cycle. - View Dependent Claims (18, 19, 20, 21)
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22. A base station configured to communicate with one or more communication devices, the base station comprising:
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circuitry configured to acquire location information corresponding to a mobile terminal; select a communication device among the one or more communication devices base on the acquired location information; and issue an instruction to shift the selected communication device to active mode, in a case the selected communication device is operating in a power save mode, wherein the selected communication device operates in one of the power save mode in which the communication device transmits a first reference signal according to a first cycle or the active mode in which the communication device transmits a second reference signal according to a second cycle, the first cycle being longer than the second cycle. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification