KR100565316B1 - Method for Determining Synchronous Path of Mobile Device in Multipath - Google Patents

Abstract

The present invention is to ensure the setting of the main communication path by the mobile terminal to select the strongest path and the shortest path by the multi-path for a certain time, the start process of determining whether the mobile terminal intends to communicate by wireless connection with the base station; In the case of determining that the mobile terminal intends to communicate in the startup process, the shortest path is set, and the shortest path that maintains the shortest path when the chip fingers of the shortest path and the strongest path match the predetermined number of times for a predetermined time is matched. Route process; If the chip fingers of the shortest path and the strongest path do not coincide with the set number of times for a predetermined time determined by the shortest path process, the strongest path is set, and if the chip fingers of the shortest path and the strongest path do not coincide more than the set number of times for a predetermined time. By the feature consisting of the strongest path process to maintain the strongest path, there is an effect that the main path setting for the communication can proceed quickly and surely.

Description

METHODO OF DECIDE TIME REFERENCE FINGER IN MULTI-PATH FOR MOBILE PHONE}

1 is a diagram illustrating a multipath state in a general repeater environment;

2 is a diagram illustrating a multipath state in a general fading environment;

3 is a diagram illustrating a shortest path chip path determination method in a repeater environment according to the prior art;

4 is a diagram illustrating a strongest path chip path determination method in a fading environment according to the prior art;

5 is a flowchart illustrating a method for determining a synchronization path of a mobile terminal according to the prior art;

6 is an explanatory diagram of the strongest path chip finger determination method according to the present invention;

7 is an explanatory diagram of a shortest path chip finger determination method according to the present invention;

8 is a flowchart illustrating a method for determining a synchronization path of a mobile terminal according to the present invention.

** Explanation of symbols on the main parts of the drawing **

10: mobile terminal 20: base station

30: repeater 40: obstruction

The present invention ensures the selection of the main path for multi-path time reference finger synchronization matching when the mobile terminal receives the base station signal. In particular, the mobile terminal uses a combination of finger synchronization among the strongest path and the shortest path of the multi-path. The present invention relates to a method for determining a synchronization path of a mobile terminal in a multipath to ensure that the main path setting by reference synchronization is maintained for a predetermined time.

USER EQUIPMENT (UE) is a wireless connection and communication with the other party through the base station (BS) while moving freely in the registered service area (SERVICE AREA). Communication equipment.

Since the mobile terminal is guaranteed to be mobile, the mobile terminal can be moved to any place. In particular, when the mobile terminal moves to a place with many obstacles, a multipath with the base station is formed by the obstacles, and thus the shortest path with the base station. Synchronization should be made to the signal received through. In the place where a repeater or the like is installed, the synchronization should be made to the signal received through the path having good signal strength.

The repeater (REPEATER OR BOOSTER) is added to the service area by amplifying and supplying the signal of the base station (BS) to a place where the signal of the base station (BS) reaches or does not reach the weak strength and cannot use the mobile communication service. Form.

If the mobile terminal is synchronized with the time reference finger (FINGER) in the signal transmitted in the shortest path among the signals transmitted from the base station, even if there is a stable signal transmission path, such as a repeater Since the unstable signal transmitted from the base station is synchronized with the time reference finger, synchronization is unnecessary.

In addition, if the synchronization of the time reference finger of the good (BIGGEST or STRONGEST) signal strength path is considered in consideration of the use of a repeater, the instantaneous signal strength fluctuation occurs due to fading, so that the frequent time reference finger synchronization is controlled. This happens.

Accordingly, there is a need for technology development that solves the problem of unnecessary synchronization, frequent time reference finger synchronization, and the like.

Hereinafter, a method of determining time reference finger synchronization of a mobile terminal according to the prior art will be described with reference to the accompanying drawings.

1 is a diagram illustrating a multipath state of a general repeater environment, FIG. 2 is a diagram illustrating a multipath state of a general fading environment, and FIG. 3 is a shortest path of a repeater environment according to the prior art. 4 is an explanatory diagram of a chip path determination method, FIG. 4 is a diagram illustrating a strongest path chip path determination method in a fading environment according to the prior art, and FIG. 5 is a flowchart of a method of determining a synchronous path of a portable terminal according to the prior art.

Referring to FIG. 1, by way of example, a multipath state of a general repeater environment will be described. In the mobile communication service area formed by the base station 20, the base station 20 is located in a shaded area having a poor radio wave environment. The service area is enlarged by the repeater 30 that amplifies and outputs the signal.

The mobile terminal 10 located in the service area transmits the path 1 through which the signal of the base station 20 is transmitted through a direct path, and the repeater 30 that receives, amplifies, and outputs the signal of the base station 20. The path 2 and the signal output from the repeater 30 are received by the obstacle 40 and receive both the signals of the path 3 and the path 4 transmitted.

For example, the mobile terminal is synchronized with reference to a chip time finger of a signal arriving in a path having the highest signal strength (BIGGEST CODE POWER PATH) or the strongest path among signals received in the multipath as described above, and thus communicating. do.

Hereinafter, referring to FIG. 2, a multipath state of a general fading environment will be described. Referring to FIG. 2, the mobile terminal 10 communicating while moving in a mobile communication service area formed by the base station 20 is a base station. 20 includes a path 1 for directly transmitting a signal to the mobile terminal 10 without reflection by the obstruction 40, and a path 2, a path 3, and a path 4 for transmitting the signal reflected by the obstruction 40.

For example, the mobile terminal 10 is synchronized with reference to the chip time finger of the signal arriving through the earliest path (EARLIEST CHIP POSITION PATH) among the signals received in the multipath by fading as described above. Communicate

Hereinafter, with reference to the accompanying Figure 3, the shortest path chip finger determination method in a repeater environment according to the prior art.

The corresponding signal is received in synchronization with a time reference finger of the path PATH 1 that arrives the fastest from the base station 20.

The shortest path chip finger selection method receives the corresponding signal in synchronization with a signal transmitted through the path 1, which is the shortest path, even when the signal strength arrives from the repeater 30 via the path 2 in the vicinity.

If the signal of the path 1 is not received as time passes, the signal is received in synchronization with the signal of the path 2 applied with a large signal strength from the repeater 30, and the signal is transmitted from the base station again after time passes. When a signal is received in path 1 of the shortest path where the signal arrives fastest, the signal is synchronized with the path 1.

Therefore, the shortest path selection method of the prior art as described above, even when a strong level signal arrives from an adjacent repeater or the like, the signal arriving at the fastest from the base station 20, that is, the signal strength is weak and is unstable due to time reference. (TIME REFERENCE) Since the synchronization signal is selected, there is a problem in that the procedure for unnecessarily adjusting synchronization is repeated.

Hereinafter, with reference to the accompanying Figure 4, the strongest path chip finger determination method in a fading environment according to the prior art.

The mobile terminal 10 synchronizes the signal of the strongest path having the highest reception level, that is, the signal received through the path 2, among the signals applied in the multipath from the base station 20 as a time reference finger. When the signal level received by the path 1 is the highest as time passes, the signal of the path 1 is set to a time reference finger to synchronize the signal, and when the time passes, the signal level received by the path 1 is different. When the level is higher than the signal received through the path, the signal of the path 1 is continuously synchronized with the time reference finger.

However, the strongest path chip selection method as described above has a problem in that the time reference finger synchronization is frequently increased when the code power of a specific path is instantaneously increased due to fading.

Hereinafter, a method for determining a synchronization path of a mobile terminal according to the prior art will be described with reference to FIG. 5.

The portable terminal 10 determines whether to receive a base station signal by wirelessly connecting to the base station 20 (S10), and when receiving the base station signal in the determination (S10), determines whether to select the shortest path or the strongest path signal. (S20).

In the case where the shortest path is selected in the determination (S20), when the chip finger arriving from the base station is selected as the synchronous path among the signals of the multipath as the synchronization path (S30), and the strongest path is selected in the determination (S20), Among the signals of the multipath, the chip finger having the greatest intensity or level is selected as the synchronization path (S40).

It is determined whether the communication is made through the path selected and determined as described above (S50), and when the communication is performed in the determination (S50), the communication proceeds (S60), and if the location of the selected chip finger is changed, the second step is changed. If the position of the selected chip finger is not changed, the process returns to the fifth step S50.

In the conventional method of determining the synchronization path of the mobile terminal according to the above-described configuration, the procedure for determining the synchronization path is complicated and the number of times increases, thereby increasing the load of the mobile terminal.

 In the present invention, since the mobile terminal synchronizes with the shortest path chip finger of the base station and if the chip paths of the shortest path and the strongest path do not coincide for the set time, the process of repeating the synchronization with the strongest path chip finger is performed. It is an object of the present invention to provide a method for determining a synchronous path of a mobile terminal in a multipath by clarifying the main path of the mobile terminal.

In order to achieve the above object, the present invention includes a start process for determining whether the mobile terminal is to communicate with the base station by wireless connection; In the case of determining that the portable terminal is to communicate in the starting process, the shortest path is set, and the shortest path is maintained when the chip fingers of the shortest path and the strongest path match the predetermined number of times for a predetermined time. The shortest path course; If the chip fingers of the shortest path and the strongest path do not coincide by the set number of times for a predetermined time as determined by the shortest path process, the strongest path is set, and the chip fingers of the shortest path and the strongest path do not coincide more than the set number of times for a predetermined time. Otherwise it is characterized by the strongest path process to maintain the strongest path.

Hereinafter, a method of determining a synchronous path of a mobile terminal in a multipath by the present invention will be described with reference to the accompanying drawings.

6 is an explanatory diagram of the strongest path chip finger determination method according to the present invention, FIG. 7 is an explanatory diagram of the shortest path chip finger determination method according to the present invention, and FIG. The method of determining the synchronous path of the portable terminal is as follows.

According to the present invention with reference to FIG. 6, the strongest path chip finger determination method will be described. Among the multipath signals of a base station (BS) or a repeater (REPEATER) which the mobile terminal (UE) receives by wireless connection, the reception level is the highest. Select the signal of this large (BIGGEST or STRONGEST) chip finger path and set it as a time reference path, and after a certain time elapses, the chip finger path having the largest reception level among the received multipath signals is again present. Repeat the process of selecting the signal and setting it as a time synchronization path.

The strongest path set as described above does not coincide with the chip finger of the shortest path in which the strongest path and the signal transmitted from the base station reach the earliest times more than the predetermined number of yens set for the predetermined T time. If not, that is, if there is a mismatch.

Hereinafter, referring to the attached FIG. 7, the shortest path chip finger determination method will be described. The portable terminal UE is outputted from a base station BS or a repeater that is wirelessly connected to the multipath. Among the transmitted signals, the signal of the chip finger path arriving at the earliest path (EARLIEST CHIP POSITION PATH) is selected and set as the time reference path, and after a predetermined time elapses, the received multiple The process of selecting the signal of the fastest arriving path among the path signals and setting it as a time synchronous path is repeated.

The shortest path set as described above is when the chip fingers of the path having the highest level among the signals transmitted from the base station are matched as the strongest path more than the predetermined number of predetermined N times during the predetermined T time. Is maintained on.

Hereinafter, with reference to the accompanying Figure 8, by the present invention, a method for determining a synchronization path of a mobile terminal in a multi-path will be described with reference to the accompanying drawings.

A start process (S100) of determining whether the mobile terminal (UE) is to communicate with the base station (BS) by radio;

If the mobile terminal (UE) is determined in the start process (S100) to communicate, the shortest path is set, and when the chip fingers of the shortest path and the strongest path match the predetermined number of times or more for a predetermined time, By maintaining the shortest path, when the mobile terminal (UE) wants to communicate, the chip finger (CHIP FINGER) of the earliest path (EARLIEST CHIP POSITION PATH) where the signal arrives from the base station (BS) is the fastest. A first process of setting and operating in (TIME REFERENCE FINGER) (S110); It is determined whether the shortest path of the first process S110 coincides with the chip finger of the strongest path more than a set number of times N during the set T time, and if it matches, the first process S110. The shortest path process consisting of a second process (S120) for maintaining the shortest path setting by returning to),

If the chip fingers of the shortest path and the strongest path do not coincide by the set number of times for a predetermined time as determined by the shortest path process, the strongest path is set, and the chip fingers of the shortest path and the strongest path do not coincide more than the set number of times for a predetermined time. Otherwise, the strongest path is maintained, and the highest level signal is received when the chip fingers of the shortest path and the strongest path do not coincide with the set number of Ns during the randomly set tee time in the shortest path process. A third step (S130) of setting and operating a chip finger of the strongest path as a synchronous SYNCHRONOUS path; It is determined whether the strongest path of the process (S130) matches the chip finger of the shortest path more than the set number of times (N) for a predetermined tee time, and if it does not match, maintains the set strongest path and matches. In this case, it consists of the strongest path process consisting of a fourth process (S140) to feed back to the shortest path process.

Hereinafter, according to the present invention having the above-described configuration, a method of setting a synchronization path of a mobile terminal in a multipath will be described in detail with reference to the accompanying drawings.

When the mobile terminal (UE) is connected to the base station (BS) by wireless connection and communication (S100), the mobile terminal (UE) is connected to the base station (BS) at the shortest distance is the shortest transmission signal The setting of the path (EARLIEST CHIP POSITION PATH) is first determined, and the mobile communication service is used through the chip finger of the determined shortest path (S110).

As described above, whether the chip finger of the shortest path set preferentially matches the chip finger by the BIGGEST CODE POWER PATH more than a predetermined number of times during the predetermined T time. Determine (S120).

If the chip fingers match at the same chip position (CHIP POSITION) for at least N times during the tee time set in the determination S120, the process returns to the first process S110 and sets the priority. Keep setting the shortest path.

If the chip finger does not coincide in the same chip position during the set tee time in the determination S120, the chip according to the strongest path (BIGGEST CODE POWER PATH) received at the largest level. A finger is set to select a finger and a mobile communication service is used through the set strongest path (S130).

It is determined whether the chip finger of the strongest path set as described above coincides with the chip finger by the earliest path during the predetermined tee time more than a predetermined number of times. (S140).

When the chip fingers coincide in the same chip position during the tee time set in the determination S140, the chip fingers are fed back to the first process S110, and thus the shortest path. In the case where the chip finger does not coincide at the same chip position or more than the number of times during the tee time set in the determination (S140), that is, the discrepancy is different, the third process ( S130) to maintain the setting of the strongest path again.

The present invention of the above configuration, among the multi-path (MULTI-PATH) received by the mobile terminal, the shortest path is first set and operated, and matches the strongest path by a predetermined number of yen (N) for a predetermined tee (T) time. In this case, the shortest path is maintained, and if it does not match, the strongest path is maintained. Therefore, the main path for communication is quickly and securely established, and unnecessary steps are not repeated for the path setting.

 According to the present invention having the above-described configuration, the mobile terminal sets priority to receive the signal of the base station through the shortest path among the multipaths, and sets the shortest path setting when the chip positions of the shortest path and the strongest path match for a predetermined time. As a result, there is an industrial use effect in which the main path setting for communication is performed quickly and reliably.

In addition, since the portable terminal sets the main path for communicating with the base station at the same time, there is no unnecessary process, thereby reducing the load of the portable terminal, thereby having a convenient effect.

Claims (5)

A start-up process of determining whether the mobile terminal wants to communicate with the base station by wireless connection; In the case of determining that the portable terminal is to communicate in the starting process, the shortest path is set, and the shortest path is maintained when the chip fingers of the shortest path and the strongest path match the predetermined number of times for a predetermined time. The shortest path course, If the chip fingers of the shortest path and the strongest path do not coincide by the set number of times for a predetermined time as determined by the shortest path process, the strongest path is set, and the chip fingers of the shortest path and the strongest path do not coincide more than the set number of times for a predetermined time. If not, the method of determining a synchronous path of a mobile terminal in a multipath, characterized in that it consists of the strongest path process to maintain the strongest path. According to claim 1, wherein the shortest path process, A first step of setting and operating a chip finger of the shortest path in which a signal arrives fastest from a base station as a time synchronous path in order to communicate in the start process; Determining whether the shortest path of the first process matches the chip finger of the strongest path more than the set number of times (N) during the set tee time, and in case of matching, the second process of maintaining the shortest path setting. A method for determining the synchronization path of a mobile terminal in a multipath. The method of claim 2, wherein the shortest path setting is maintained. When the chip finger of the shortest path matches the chip finger of the strongest path more than the set number of times (N) for the set tee time, the feedback is returned to the first process and maintained. Synchronization path determination method. The method of claim 1, wherein the strongest path process, If the chip finger of the shortest path and the strongest path does not coincide by the set number of times (N) during the tee time set in the shortest path process, the chip finger of the strongest path receiving the highest level signal is used as the synchronous path. The third process of setting up and operating, It is determined whether the strongest path set in the third process matches the chip finger of the shortest path more than the set number of yens (N) for the set tee time, and if it does not match, maintains the set strongest path and matches. Is a fourth process of feedback to the shortest path process. The method of claim 4, wherein the strongest path setting is maintained. When the chip finger of the strongest path does not coincide with the chip finger of the shortest path more than the set number of times (N) for a set tee time, the terminal returns to the third process and is maintained. How to determine the synchronous path of.

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