Method and apparatus for obtaining synchronization for communication between devices
First Claim
1. A method for operating a terminal, the method comprising:
- monitoring a preamble signal from a base station;
transmitting a first preamble signal based on a synchronization with the base station, if the terminal fails to receive the preamble signal from the base station; and
performing communication with a neighbor terminal which receives the first preamble signal from the terminal.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and an apparatus for obtaining synchronization of a terminal for communication between devices when a base station collapses are provided. The method includes, when a preamble signal is not received from the base station, maintaining a first synchronization for a predetermined time using a timer, transmitting a first preamble signal at a first synchronization point, performing a synchronization procedure with at least one neighbor terminal based on the first preamble signal, and, after the synchronization procedure, performing communication with the at least one neighbor terminal. In addition, when a preamble signal is not received from a base station, a first preamble signal from a relevant neighbor terminal is monitored for a predetermined time. When the first preamble signal is not received from the relevant neighbor terminal for the predetermined time, a second preamble signal is transmitted at an arbitrary point.
21 Citations
26 Claims
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1. A method for operating a terminal, the method comprising:
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monitoring a preamble signal from a base station; transmitting a first preamble signal based on a synchronization with the base station, if the terminal fails to receive the preamble signal from the base station; and performing communication with a neighbor terminal which receives the first preamble signal from the terminal. - View Dependent Claims (2, 3, 4)
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5. A method for operating a terminal, the method comprising:
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monitoring a preamble signal from a base station; monitoring a first preamble signal from a neighbor terminal, if the terminal fails to receive the preamble signal from the base station; transmitting a second preamble signal, if the terminal fails to receive the first preamble signal; and performing communication with a first neighbor terminal which receives the second preamble signal. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for a terminal, the apparatus comprising:
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a controller configured to monitor a preamble signal from a base station; and a transmitter configured to, transmit a first preamble signal based on synchronization with the base station, if the terminal fails to receive the preamble signal from the base station, wherein the controller is further configured to perform communication with a neighbor terminal which receives the first preamble signal from the terminal. - View Dependent Claims (15, 16, 17)
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18. An apparatus for a terminal, the apparatus comprising:
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a controller configured to monitor a preamble signal from a base station, and, to monitor a first preamble signal from a neighbor terminal, if the terminal fails to receive the preamble signal from the base station; and a transmitter configured to transmit a second preamble signal, if the terminal fails to receive the first preamble signal, wherein the controller is further configured to perform communication with the at least one neighbor terminal which receives the second preamble signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification