Communication system, mobile terminal and communication method
First Claim
1. A communication system comprising:
- a first base station configured to perform communication using a first communication protocol which uses first radio frames and first synchronization signals synchronizing the first radio frames;
a second base station configured to perform communication using a second communication protocol which uses second radio frames; and
a mobile terminal configured toperform communication on the basis of the first communication protocol and the second communication protocol,receive, while communicating with the first base station, second synchronization signals from the second base station, the second synchronization signals being based on the first synchronization signals and synchronizing the second radio frames, andestimate transmitting timing of the second radio frames including symbols on the basis of the received second synchronization signals, whereineach of the first synchronization signals has a length corresponding to each of the first radio frames, andeach of the second synchronization signals is a signal obtained by adjusting the length of each of the first synchronization signals to become a length corresponding to each of the second radio frames.
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Accused Products
Abstract
A communication system includes a first base station for communicating complying with a first communication protocol, a second base station for communicating by using radio frames complying with a second communication protocol and transmitting synchronization signals complying with the first communication protocol, the synchronization signals synchronizing the transmitted radio frames, and a mobile terminal for communicating according to the process includes: receiving the synchronization signals from the second base station while communicating with the first base station, estimating transmitting timing of the radio frames including symbols on the basis of the received synchronization signals, measuring a receiving signal strength of the symbol on the basis of the estimated timing, and controlling a handover from the first base station to the second base station on the basis of the measurement result by the measurement of the receiving signal strength of the symbol.
18 Citations
11 Claims
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1. A communication system comprising:
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a first base station configured to perform communication using a first communication protocol which uses first radio frames and first synchronization signals synchronizing the first radio frames; a second base station configured to perform communication using a second communication protocol which uses second radio frames; and a mobile terminal configured to perform communication on the basis of the first communication protocol and the second communication protocol, receive, while communicating with the first base station, second synchronization signals from the second base station, the second synchronization signals being based on the first synchronization signals and synchronizing the second radio frames, and estimate transmitting timing of the second radio frames including symbols on the basis of the received second synchronization signals, wherein each of the first synchronization signals has a length corresponding to each of the first radio frames, and each of the second synchronization signals is a signal obtained by adjusting the length of each of the first synchronization signals to become a length corresponding to each of the second radio frames. - View Dependent Claims (2, 3, 4, 5, 9)
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6. A mobile terminal comprising:
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a receiver configured to receive, while communicating with a first base station, second synchronization signals from a second base station, the first base station performing communication using a first communication protocol which uses first radio frames and first synchronization signals synchronizing the first radio frames, the second base station performing communication using a second communication protocol which uses second radio frames, and the second synchronization signals being based on the first synchronization signals and synchronizing the second radio frames; and a processor configured to estimate transmitting timing of the second radio frames including symbols on the basis of the received second synchronization signals, wherein each of the first synchronization signals has a length corresponding to each of the first radio frames, and each of the second synchronization signals is a signal obtained by adjusting the length of each of the first synchronization signals to become a length corresponding to each of the second radio frames. - View Dependent Claims (10)
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7. A communication method comprising:
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receiving, while communicating with a first base station, second synchronization signals from a second base station, the first base station performing communication using a first communication protocol which uses first radio frames and first synchronization signals synchronizing the first radio frames, the second base station performing communication using a second communication protocol which uses second radio frames, and the second synchronization signals being based on the first synchronization signals and synchronizing the second radio frames; and estimating transmitting timing of the second radio frames including symbols on the basis of the received second synchronization signals, wherein each of the first synchronization signals has a length corresponding to each of the first radio frames, and each of the second synchronization signals is a signal obtained by adjusting the length of each of the first synchronization signals to become a length corresponding to each of the second radio frames. - View Dependent Claims (11)
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8. A base station comprising:
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a processor configured to perform communication with a mobile terminal by using a second communication protocol which uses second radio frames; and a transmitter configured to transmit second synchronization signals to the mobile terminal which communicates with another base station by using a first communication protocol which uses first radio frames and first synchronization signals synchronizing the first radio frames, the second synchronization signals being based on the first synchronization signals and synchronizing the second radio frames, wherein each of the first synchronization signals has a length corresponding to each of the first radio frames, and each of the second synchronization signals is a signal obtained by adjusting the length of each of the first synchronization signals to become a length corresponding to each of the second radio frames.
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Specification