PORTABLE INTERNET TERMINAL, METHOD FOR PROVIDING POSITION INFORMATION OF PORTABLE INTERNET TERMINAL AND REPEATER USING THE METHOD

Abstract

A repeater including a downlink signal processor, which receives a downlink frame from a radio access station (RAS) and transmits the downlink frame to a portable Internet terminal, and an uplink signal processor, which receives an uplink frame from the portable Internet-terminal and transmits the uplink frame to the RAS, is provided, including: an ID storage unit to store identification (ID) information of the repeater; switches to switch a signal transmission path so that the downlink frame can be transmitted to the portable Internet terminal through the downlink signal processor, or the uplink frame can be transmitted to the RAS through the uplink signal processor; and a switch control unit to control the switches such that the ID information of the repeater is inserted into part of the downlink frame and the downlink and uplink frames are transmitted.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.

FIG. 1 illustrates a WiBro system for explaining an exemplary embodiment of the present invention.

FIG. 2 illustrates a WiBro repeater according to an exemplary embodiment of the present invention.

FIG. 3 illustrates a block diagram of a switch control unit shown in FIG. 2.

FIGS. 4 and 5 illustrate frame structures of a transmission signal for explaining an exemplary embodiment of the invention.

FIG. 6 illustrates a method for transmitting information on a repeater which is required in providing position information of a portable Internet terminal according to another exemplary embodiment of the invention.

FIG. 77 illustrates a unit which is required for a portable, Internet terminal to detect position information provided by a WiBro repeater according to an exemplary embodiment of the invention.

Claims

1. A repeater including: a downlink signal processor, which receives a downlink frame from a radio access station (RAS) and transmits the downlink frame to a portable Internet terminal, and an uplink signal processor, which receives an uplink frame from the portable Internet terminal and transmits the uplink frame to the RAS, the repeater comprising:an ID storage unit to store, identification (ID) information of the repeater;switches to switch a signal transmission path so that the downlink frame can be transmitted to the portable Internet terminal through the downlink signal processor, or the uplink frame can be transmitted to the RAS through the uplink signal processor; anda switch control unit to control the switches such that the ID information of the repeater is inserted into part of the downlink frame and the downlink and uplink frames are transmitted.

2. The repeater of claim 1, wherein the switch control unit inserts the ID information of the repeater into a common sync symbol segment of the downlink frame.

3. The repeater of claim 2, wherein the switch control, unit inserts the ID information of the repeater into the common sync symbol segment and controls the switches such that the downlink frame is transmitted till or just prior to the common sync symbol segment according to binary information of the ID information.

4. The repeater of claim 1, wherein the switch control unit comprises: a frame sync acquisition unit to detect a preamble from a downlink frame received through an antenna;a number-of-downlink symbols acquisition unit to acquire information about the number of downlink symbols by decoding a downlink map within the downlink frame;a frame number acquisition unit to acquire information about frame number through the decoded downlink map;a common sync symbol position calculation unit to calculate position of a common sync symbol segment from the number of downlink symbols and the frame number; anda switch drive unit to control the switches so that the downlink frame can be transmitted till or just prior to the common sync symbol segment according to the binary information of the ID information of the repeater.

5. A method for providing position information of a portable Internet terminal through a repeater controlling switches provided therein so that downlink and uplink frame signals can be transmitted between the portable Internet terminal and a radio access station, the method comprising: acquiring frame sync by detecting a preamble from the downlink frame received through an antenna;acquiring information about the number of downlink symbols by decoding a downlink map within the downlink frame;acquiring information about frame number through thedecoded downlink map;calculating position of a common sync symbol segment from the number of downlink symbols and the frame number; andinserting ID information of the repeater into the calculated common sync symbol segment of the downlink frame and transmitting the downlink frame.

6. The method of claim 5, wherein inserting ID information comprises controlling the switches so that the downlink frame can be transmitted till or just prior to the common sync symbol segment according to binary information of the ID information of the repeater.

7. A portable Internet terminal detecting position information of the portable Internet terminal which is transmitted from a repeater, the portable Internet terminal comprising: a correlator to obtain a correlation value by performing a correlation operation on a downlink frame symbol transmitted from the repeater; anda threshold comparator to compare the correlation value with a predetermined threshold to determine whether or not a common sync symbol segment is present, and to output information about whether or not the common, sync symbol segment is present in binary data corresponding to ID information of the repeater.

8. The portable Internet terminal of claim 7, further comprising a raw ID recovery unit to recover an output value of the threshold, comparator to original raw ID.

9. The portable Internet terminal of claim 7, wherein the correlator performs either auto-correlation operation or cross-correlation operation to calculate the correlation value.

10. The portable Internet terminal of claim 8, wherein the correlator performs either auto-correlation operation or cross-correlation operation to calculate the correlation value.