KR20040071516A - Repeater including PN shadow radio finger equipment being used in mobile communication network - Google Patents

Abstract

PURPOSE: A repeater including a signal delay generator adopted for a mobile communication network is provided to enhance performance of a mobile network and effectively operate it by allowing a mobile communication network to determine whether a mobile terminal receives a signal through a repeater. CONSTITUTION: A controller(200) performs general controlling on a repeater. A repeater monitoring unit(201) collects and monitors state and operation parameters of the repeater. A communicating unit(202) transfers general information of the repeater to an operation maintenance server and a position tracking server, receives a signal delay command of the operation maintenance server, and provides a wireless communication path. A downlink signal delay generator(pseudo noise shadow radio finger equipment)(205) determines whether propagation transmission delay of a downlink input signal has occurred and whether the signal has passed. An uplink signal delay generator(206) determines whether propagation transmission delay of an uplink input signal has occurred and whether the signal has passed.

Description

Repeater including signal delay generator applied to mobile communication network {Repeater including PN shadow radio finger equipment being used in mobile communication network}

The present invention relates to a repeater including a signal delay generator applied to a mobile communication network, and in particular, when a mobile terminal receives a service through a repeater in a mobile communication network operating a repeater in a wireless network design of the mobile communication network, the repeater The present invention relates to a repeater including a signal delay generator capable of determining whether or not a service is provided.

In general, a mobile communication service provides a service by a mobile terminal establishing a call path with a base station in a mobile communication network, and a base station is installed as a result of a wireless network design, and provides a service by the base station. However, in the case of urban areas, the mobile terminal cannot receive a signal transmitted from the base station due to interference disturbances such as a large number of buildings, which is called a shaded area.

The repeater is installed to reach the base station's signal in this shaded area instead, and the repeater delivers the signal transmitted from the base station to every corner of the shaded area, and delivers the signal transmitted from the mobile terminal in every corner to the base station. The mobile terminal can transmit and receive signals.

Hereinafter, a method of providing a service of a mobile terminal in a wireless network including a repeater according to the prior art will be described with reference to the accompanying drawings.

1 is a service configuration diagram of the prior art.

As shown in FIG. 1, the mobile communication network includes a path through which the mobile terminal 100 establishes a call path with the base station 120 through the repeater 110, and the mobile terminal 100 does not pass through the repeater 110. There is a path through which the call path is established at 120 and a path through which the service path is provided by setting both paths and the call path. At this time, the receiver 123 of the base station modem 121 of the base station has a function of receiving a multipath signal, and uses a multipath signal by combining a multipath signal of a wireless network.

In addition, in the conventional mobile communication network, the wireless network design has a purpose to provide a seamless service to the mobile terminal, and in the case of the wireless network through the repeater, the repeater monitoring does not interfere with the communication service due to radio transmission delay and other signal distortions. The back function has been mainly studied.

However, in the mobile communication service, there is no method for distinguishing a signal through a repeater and a signal not through a repeater at a receiver of a base station modem.

Since the base station performs signal processing collectively for all situations where the mobile terminal is provided with or without a repeater, the base station includes errors due to signal distortion and propagation delay due to signal transmission of the repeater. In addition, since there is no separate management method for the service providing subscriber in the repeater, the operation of the wireless network including the repeater becomes inefficient and inefficient.

In the prior art, since the radio transmission delay obtained from the mobile terminal is applied to the parameters of various additional services regardless of whether it is a signal through a repeater or a signal not through the repeater, the accuracy is lowered, and the radio transmission delay parameter obtained from the mobile terminal is a repeater. It is not known whether the signal through the signal through the base station or there is a problem that there is no way to correct the radio transmission delay error caused by this.

In recent years, mobile telecommunication services have tended to be continuously developed and provided with various additional services from voice call-oriented services. Among them, Location Based Services is by far the best, and in order to provide location based services, it is necessary to be able to identify the location of mobile terminals. Currently, the technologies applied to locate the mobile terminal in the mobile communication network include the Assisted-GPS (Global Positioning System) method and the Enhanced-Observed Time Difference (E-OTD) method. Of course, technologies such as Time of Arrival (TOA), Time Difference of Arrival (TDOA), Angle of Arrival (AOA), and Image Matching may be applied.

In particular, in case of applying a positioning technique using a propagation delay parameter such as TDOA (Time Difference of Arrival), it can be determined whether the propagation delay parameter obtained from the mobile terminal is a signal through a repeater or a base station. There is a problem that the radio wave delay error caused by the absence, that is, the location is not accurate.

An object of the present invention has been proposed to solve the above problems, to identify the characteristics of the signal of the mobile terminal while receiving the service through the repeater to determine whether the service is received through the repeater It is to provide a repeater including a signal delay generator that can be.

In addition, another object of the present invention is to determine whether the mobile terminal establishes a call path through a repeater when applying a positioning technique that relies on radio wave transmission delay, such as a location-based service, among the additional services currently provided by the mobile communication network. In addition to eliminating constraints due to errors such as delays in radio transmission that can occur through repeaters, it is possible to improve the performance of wireless networks and to manage wireless networks separately from base stations. It is to provide a repeater that can operate efficiently.

1 is a service configuration diagram of the prior art.

2 is a service configuration diagram according to an embodiment of the present invention.

3 is a structural diagram of a repeater according to an embodiment of the present invention.

4 is a structural diagram of a telecommunications system to which the present invention is applied;

5 is a signal change diagram of the terminal modem by the operation of the downlink signal delay generator according to an embodiment of the present invention.

6 is a signal change diagram of the base station modem by the operation of the uplink signal delay generator according to an embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

100: mobile terminal 101: terminal modem

102: mobile terminal receiver 103: mobile terminal transmitter

110: repeater 111: downlink

112: uplink 120: base station

121: base station modem 122: base station transmitter

123: base station receiver 150: a repeater including a signal delay generator

200: control unit 201: repeater monitoring unit

202: communication unit 203, 204: amplifier (PA)

205: downlink signal delay generator 206: uplink signal delay generator

210, 213, 216: delay unit 211, 214, 215, 217: selection unit

212: signal coupler 218: final selector

220: signal combiner 221,223, 224, 226: selector

222, 225, 227: delay unit 228: signal coupler

300: mobile terminal 301: operation preservation server and location tracking server

303: Repeater A 307: Control Station

308: exchange office

According to an aspect of the present invention, there is provided a downlink signal delay generator (PN Shadow Radio Finger Equipment) for selectively passing a predetermined time delay through an input downlink signal by a control signal; And a control unit for controlling the downlink signal delay generator so that the downlink signal inputted to the downlink signal delay generator is selectively outputted by a predetermined time delay, and providing a repeater including a signal delay generator applied to the mobile communication network. do.

In another aspect, the present invention provides an uplink signal delay generator for selectively outputting an uplink signal input by a control signal for a predetermined time delay; And a control unit configured to control an uplink signal delay generator so that an uplink signal input to the uplink signal delay generator is selectively outputted by a predetermined time delay. The repeater includes a signal delay generator applied to a mobile communication network. do.

The present invention also provides a repeater including a signal delay generator applied to a mobile communication network, characterized in that it comprises both the downlink signal delay generator and the uplink signal delay generator.

The downlink signal delay generator includes a signal coupler for distributing an inputted downlink signal; N delay units for generating a propagation delay from one step to n steps of the one signal distributed by the signal coupler; (n is an arbitrary natural number.) Whether the propagation delay signal generated by each of the delay units passes. N selection units to determine; And a final selection unit which receives the propagation delay signal passing through the selection unit and the other signal distributed by the signal coupler and selectively passes the received signal.

The uplink signal delay generator includes a signal coupler for distributing an input uplink signal; N delay units for generating a propagation delay from one step to n steps of one signal distributed by the signal coupler; N selectors for determining whether each of the propagation delay signals generated by the delay unit passes; And a signal combiner configured to receive and combine the propagation delay signal passing through the selector and the other signal distributed by the signal coupler.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a service according to an embodiment of the present invention, Figure 3 is a structural diagram of a repeater according to an embodiment of the present invention.

The repeater 150 according to the present invention operates the control unit 200 which performs overall control of the repeater, the repeater monitoring unit 201 which performs a function of collecting and monitoring the state and operation parameters of the repeater, and the general information of the repeater. The communication unit 202, which transmits to the maintenance server and the location tracking server, receives a signal delay command of the operation maintenance server, and provides a wireless communication path, a power amplifier 203, 204 which is a general repeater component, and a downlink. Pseudo Noise Shadow Radio Finger Equipment (205) for determining the propagation delay and passing of the input signal, and uplink delay generator (200) for determining the propagation delay and passing of the upstream input signal. 206).

The signal transmitted from the base station 120 passes through the downlink signal delay generator 205 of the repeater 150 and is received by the mobile terminal 100. The signal transmitted from the mobile terminal 100 is transmitted from the repeater 150. After passing through the uplink delay generator 206, it is received by the base station 120. Due to the difference in the roles of the downlink signal delay generator 205 and the uplink signal delay generator 206, the configuration of the signal delay generators mounted downward and upward is changed.

The downlink signal delay generator 205 may include a signal coupler 212 for distributing an input down signal, and delay units 210 and 213 for generating a propagation delay of one signal distributed by the signal coupler 212. 216, the selectors 211, 214, 215, and 217 for determining whether the propagation delay signals generated by the delay units 210, 213, and 216 pass, and the selectors 211, 214, 215, and 217. It is composed of a final selector 218 for receiving the propagation delay signal passed and the other signal distributed by the signal coupler 212 to selectively pass.

The delay units 210, 213, and 216 are composed of one or more chips, so that propagation delays can be generated from step 1 to step n (hereinafter, 'n' refers to an arbitrary natural number). The selector 211, 214, 215, 217 is also composed of n to determine whether the propagation delay signal generated by each of the delay units 210, 213, and 216 passes.

Meanwhile, the uplink signal delay generator 206 is a signal coupler 228 for distributing an input upstream signal, and delay units 222 and 225 for generating a propagation delay of one signal distributed by the signal coupler 228. , 227, selectors 221, 223, 224, and 226 that determine whether the propagation delay signals generated from the delay units 222, 225, and 227 pass, and the selectors 221, 223, 224, and 226. It is composed of a signal combiner 220 for receiving and combining the propagation delay signal passing through and the other signal distributed by the signal coupler 228.

The delay units 222, 225, and 227 are composed of n units so as to generate propagation delays from one stage to n stages, and the selection units 221, 223, 224, and 226 are each delay units ( 222, 225, and 227 is composed of n to determine whether the propagation delay signal generated in the passage.

It looks at the operation of the present invention having the above configuration.

First, the downlink signal delay generator 205 has the same effect as the control of the reception time of the signal of the mobile terminal 100, so that the mobile terminal 100 has a plurality of adjacent base stations or repeaters having a received signal strength above a threshold point. In the case where a call path is set through (hereinafter, referred to as "Candidate Set"), a demodulator in the mobile terminal 100 is assigned to each signal.

Therefore, the mobile terminal 100 may be assigned only a demodulator to a signal as a reference, and this signal may be applied as a transmission reference point transmitted by the mobile terminal 100 to the base station 120. Cases may occur. In this case, the downlink signal delay generator 205 of the present invention is configured.

5 is a signal change diagram of the terminal modem by the operation control of the downlink signal delay generator according to an embodiment of the present invention. In the figure, P on the y-axis is Power and t on the x-axis is Time.

5 illustrates a case in which the mobile terminal 100 can assign only one demodulator to a reference signal and a case in which the received signal becomes a transmission reference point transmitted to the base station. This is a schematic of the received signal from.

When the mobile terminal 100 has a call path set through the repeater 150, the mobile terminal initially receives a signal from the repeater 150 at the time of a, and then the operation maintenance server and the location analysis server of FIG. 301 sends a command to delay the propagation of the downlink signal input to the repeater 150 for a predetermined time, the communication unit 202 receives it and transmits it to the control unit 200, the control unit 200 is the operation maintenance server of the And controlling the selectors 211, 214, 215, and 217 of the downlink signal delay generator 205 to a step corresponding to a predetermined time commanded by the location tracking server 301, thereby signaling at a time point of b or c. The reception time of is changed.

That is, the operation maintenance server and the location tracking server 301 sends a command to the repeater 150 to delay the signal received at the time of a predetermined time, and the command is properly performed so that the signal at the time a is delayed for a predetermined time. When the reception time is changed to b or c time, it can be confirmed that the call path of the mobile terminal is set through the repeater 150.

In particular, in case of the synchronous CDMA, when the downlink signal delay generator 205 is to be controlled to change the point of time of receiving the signal to the point of time b or c, the transmission time reference of the mobile terminal 100 is determined by the tracker inside the mobile terminal ( After the first signal obtained by the searcher (which is the time of a in FIG. 5) is obtained, the signal is used as a transmission time reference. The mobile terminal 100 demodulates the received signal and performs a tracking function in the demodulator according to the change of the viewpoint of the received signal.

Therefore, the time point set by the mobile terminal 100 based on the transmission time and the signal reference point of the demodulator may be different from each other, and the difference should be within +/− 1 dB. At this time, the transmission time reference time of the mobile terminal 100 performs a tracking function to match the time of the demodulator at a speed equal to 1/4 PN (Pseudo Noise) chip for 200 s.

In addition, the downlink signal delay generator 205 is characterized in that to move the maximum 1 PN chip to delay or delay removal and perform at least one second intervals. The timing of the received signal is controlled at intervals of one second by the control of the downlink signal delay generator 205, and the operation maintenance server and the location tracking server 301 of FIG. 4 are connected to the mobile terminal 100 from the base station 120 of the mobile communication network. Obtain and obtain the propagation delay parameter. Using the propagation delay parameters of the mobile terminal 100 obtained therefrom, the operation maintenance server and the location tracking server 301 determine whether the call path of the mobile terminal 100 is set through the repeater 150.

Next, looking at the uplink signal delay generator 206, the mobile terminal 100 has a characteristic of moving in the mobile communication network, the base station 120 is characterized in that installed in a fixed position. Therefore, in order to normally perform the handoff function provided by the mobile communication network, the mobile terminal 100 should be able to establish a call path simultaneously with a plurality of base stations 120 corresponding to the Candidate Set defined in the standard.

In contrast, since the base station 120 should be able to receive a signal transmitted by the mobile station 100 with the minimum signal, the base station 120 combines a plurality of fading signals to maximize the gain for the signal.

Thus, the uplink signal delay generator 206 of the present invention is configured using a feature of processing a plurality of fading signals received by the base station 120, and is currently received under the control of the uplink signal delay generator 206. It is characterized by generating a signal in the form of a shadow of the signal.

6 is a signal change diagram of the base station modem by the operation of the uplink signal delay generator according to an embodiment of the present invention.

Referring to the drawings, when the uplink signal delay generator 206 does not operate, the base station 120 receives the signal transmitted from the mobile station 100 at the time of a and the time of b. When the location tracking server 301 sends a command to delay the propagation of the predetermined time to the communication unit 202 of the repeater 150, the communication unit 202 transmits this command to the control unit 200, and the control unit ( 200 controls the operation of the selection units 221, 223, 224, and 226 of each step.

The upward signal delay generator 206 generates a predetermined time signal delay (a time difference between a and a 'or a time difference between b and b') to generate a signal similar to the signal received at the time of a. The signal is generated again at the time point b, and a signal similar to the signal received at the time point b is generated again at the time point b ', so that the mobile terminal 100 receives the repeater with or without the signal at the time point a' and b 'time point. Through this, it is possible to determine whether the call path is set.

That is, the downlink signal delay generator 205 outputs one of a signal that does not have a propagation delay and a signal that has a predetermined time propagation delay, but the uplink signal delay generator 206 is a signal that does not have a propagation delay. Since the propagation delay is outputted together, the base station receives the signals a and b of the propagation delay of FIG. 5 and the signals a 'and b' from which the propagation delay is generated.

Therefore, in the case of the uplink delay generator 206, the operation preservation server and the location tracking server 301 determine whether a 'and b' exist and determine whether the mobile terminal 100 is set as a call through the repeater 150. It will be judged.

Let's look at the application example of the positioning method by the repeater 150 including the signal generating delay device of the present invention.

4 is a structural diagram of a mobile communication system to which the present invention is applied. The mobile communication system shown in FIG. 4 includes a mobile station 300 receiving a mobile communication service, a repeater A 303 including a signal delay generator and a repeater B 304, a base station A matching the repeater A and the repeater B ( 306), base station B 305 that matches without a repeater, control station 307 that matches base station A and base station B, an exchange station 308 that performs the exchange function of a mobile communication system, and serves as a gateway for providing location tracking services. Mobile Positioning Center (MPC) 302 to perform, Position Determining Entity (PDE) 309 to perform the position tracking function, Operational maintenance server and position tracking to perform the operation preservation and position tracking function of repeater A and repeater B. It is configured to include a server (301).

The application method of the mobile communication system having the above configuration will be described.

Repeater 303 to operate the downlink signal delay generator 205 and the uplink signal delay generator 206 of the repeater 303, 304 in the operation maintenance server and location tracking server 301 of the mobile communication service system. After controlling the communication unit 202 of 304, it is determined whether or not a call path is established through the repeaters 303 and 304 by the occurrence of a radio wave transmission delay.

When the call path is established through the repeaters 303 and 304, when the mobile terminal 300 receives a signal through the repeaters 303 and 304, radio waves from the repeaters 303 and 304 to the mobile terminal 300 are transmitted. Corrected radio wave transmission by applying the following expression with the transmission delay t0, the processing delay t2 of the repeater, and the information t1 about the delay from the base station 306 to the repeaters 303 and 304 as parameters. Compute the corrected value of the delay t0 '.

Corrected value (t0 ') = t0-(t1 + t2)

On the contrary, when the signal transmitted from the mobile terminal 300 is received by the base station through the repeater, the radio wave transmission delay may be corrected and applied by the same calculation method as described above.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the technical field of the present invention without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, it is possible to determine whether the mobile terminal is receiving a signal through the repeater in the mobile communication network to separate the service of the mobile terminal from the base station to manage the repeater service to improve the performance of the wireless network and wireless network Effective operation of the effect is possible.

In addition, it is possible not only to provide various additional services using the radio transmission delay and repeater operating parameters obtained by the function of the signal delay generator according to the present invention, but also due to an error generated by the radio transmission delay such as a location-based service. There is an effect that can remove restrictions.

Claims (5)

A downlink signal delay generator (Pseudo noise Shadow Radio Finger) for selectively passing the input down signal delayed by a predetermined time by a control signal; And a control unit for controlling the downlink signal delay generator so that the downlink signal inputted to the downlink signal delay generator selectively outputs a predetermined time delay. An upward signal delay generator for selectively outputting an input upward signal by a predetermined time delay; And a control unit for controlling an uplink signal delay generator so that an uplink signal inputted to the uplink signal delay generator is selectively delayed for a predetermined time. The method of claim 1, And an uplink signal delay generator for selectively outputting an input uplink signal by a predetermined time delay by a control signal of the controller. The method according to claim 1 or 3, The downlink signal delay generator, A signal coupler for distributing an input down signal; N delay units (n is an arbitrary natural number) for generating a propagation delay from one step to n steps of one signal distributed by the signal coupler; N selectors for determining whether the propagation delay signals generated by the delay units are passed; And A repeater including a signal delay generator applied to the mobile communication network, characterized in that it comprises a; final selection unit for receiving and selectively passing the propagation delay signal passing through the selection unit and the other signal distributed by the signal coupler; . The method of claim 2 or 3, The upward signal delay generator, A signal coupler for distributing an input upstream signal; N delay units for generating a propagation delay from one step to n steps of one signal distributed by the signal coupler; N selectors for determining whether each of the propagation delay signals generated by the delay unit passes; And And a signal combiner configured to receive and combine the propagation delay signal passing through the selection unit and the other signal distributed by the signal coupler.