JP2015177457A - Terminating device, repeating device, base station and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminating device capable of implementing soft handover by efficiently receiving signals from a plurality of base stations while utilizing an existent LCX.SOLUTION: The terminating device includes: an input/output part 31a which is connected with an LCX 20a by a reverse feeding part 22a in the case where the LCX 20a is connected with a base station 10a and a terminating device 30a and the base station 10a generates a signal orthogonal with a neighboring base station and transmits the signal to the LCX 20a; and a returning part 32a by which the signal outputted from the input/output part 31a is returned and outputted to the input/output part 31a. The input/output part 31a outputs the orthogonal signal inputted from the base station 10a via the LCX 20a to the returning part 32a, and outputs the orthogonal signal returned and outputted by the returning part 32a to the LCX 20a.

Description

  The present invention relates to a termination device, a relay device, a base station, and a wireless communication system.

  Conventionally, in an LCX system using a leaky coaxial cable (hereinafter referred to as LCX (Leakage CoaXial cable)), grating is used to efficiently obtain a stable electric field in a long-distance communication section. When a signal is input from the signal source to the forward feeding section of the LCX, the signal is transmitted through the LCX and radiated from the slit of the LCX while being attenuated. In grating, LCX with a small coupling loss is connected and combined as the distance from the signal source increases so that the received electric field of the terminal fluctuates within a certain range. As a result, the LCX system having a grating by combining different coupling losses can obtain a stable received electric field on the terminal side in the periphery where the LCX is laid, as compared with a system using an antenna. However, since the radiation gain of LCX is lower than that of the antenna, the received electric field at the terminal abruptly attenuates as the distance from the installation position increases.

  In a LCX system having a grating, when a signal source is connected to a reverse feed unit located at the opposite end of the LCX forward feed unit, the received electric field of the terminal is input from the forward feed unit. Unlike the case, it decays rapidly. This is because a signal is input from an LCX having a small coupling loss, and the input electric field is rapidly attenuated by transmitting the LCX having a large coupling loss. Therefore, the electric field received at the terminal tends to decrease as the distance from the feeding point increases. On the other hand, when a signal is input to the LCX from the reverse feed unit, a higher received electric field is obtained near the input feed unit than when a signal is input from the forward feed unit. Hereinafter, the electric field characteristic when a signal is input in a direction opposite to the direction in which LCX grating occurs is referred to as reverse grating.

  In LCX, a signal emitted in the signal input direction has directivity, and there are mainly two types of directivity. A backfire type having directivity in the direction opposite to the signal traveling direction input from the signal source to the LCX power feeding unit, and an endfire type having directivity in the signal traveling direction. The directivity is determined by the slit interval of the LCX and the wavelength of the transmission signal.

  Here, a soft handover is assumed in an LCX system including an LCX having a grating in which a base station and a forward power supply unit are connected, and a termination device and a reverse power supply unit are connected.

  In an LCX system in which a base station is connected to two LCXs and the reverse feeding units of the two LCXs are arranged in opposite directions, when a backfire type LCX is used, the signal output from the base station is forward fed. When it is input to the LCX from the unit, it proceeds from the reverse direction feeding unit toward the termination device while being radiated with the directivity opposite to the signal traveling direction. Further, when a signal output from another base station is also input to another LCX, the signal travels toward the same termination device while being emitted with a directivity opposite to the signal traveling direction. A cell boundary occurs near a termination device facing a signal transmitted from an LCX connected to a different base station, and a handover interval is formed. Since the radiation directivity of each LCX in the handover interval is opposite to that in the handover interval, the received electric field of the terminal located in the handover interval is a low electric field.

  In an LCX system in which the base station is connected to two LCXs and the reverse feeding parts of the two LCXs are arranged in opposite directions, when the endfire type LCX is used, the termination is the same as when the backfire type LCX is used. A cell boundary occurs in the vicinity of the device, and a handover interval is formed. The signal from each base station is directed to the radiation directivity in the handover interval, and the received electric field of the terminal is higher than that of the backfire type. As a result, the section in which the signals of both base stations can be received simultaneously becomes longer than in the case of using the backfire-type LCX, and soft handover is facilitated. On the other hand, assuming that the base station and a plurality of sets of LCX cables are coupled, and the terminal is located near an LCX branch laying section in which each coupled plurality of LCX branches and lays in different directions, the LCX Since the radiation directivity is directed in the opposite direction to the LCX branch laying section, a low electric field section is generated in the LCX branch laying section.

  In addition, when a backfire type LCX is used in an LCX system in which a configuration in which a base station, an LCX, and a termination device are combined one by one is arranged on a straight line so that the grating directions are the same, adjacent combinations are used. A handover interval is between the terminal device and the base station. In the handover interval, the directivity of LCX from one configuration is directed to the handover interval, but the directivity of LCX from the other configuration is directed in the opposite direction, so that the reception electric field of the signal from the one-side base station becomes low. The same applies when the endfire LCX is used. Also, when backfire LCX and endfire LCX are used alternately between adjacent base stations, the radiation directivity of two adjacent LCXs may be directed toward the handover interval, or two adjacent LCXs In some cases, both radiation directivities are directed in the opposite direction to the handover interval, and signals from both base stations cannot be received in a high electric field in all handover intervals.

  In order to realize soft handover, it is necessary to receive signals from both base stations for a certain period of time. In conventional LCX systems, it is difficult to obtain an efficient soft handover section without generating a low electric field section. there were. On the other hand, as a method for eliminating the low electric field section of the LCX branch section when using a plurality of endfire LCX from the base station, for example, in Patent Document 1 below, the endfire LCX is divided into a branch portion near the base station. A technique for eliminating the low electric field by laying so as to overlap with each other is disclosed. This method is also effective as a method for obtaining a soft handover section by backfire LCX.

  In addition, when a backfire LCX is used, there is a method using a sharp directional antenna as a solution for a low electric field interval between adjacent LCXs. A low electric field is eliminated by radiating a signal from an antenna toward a low electric field section where adjacent LCXs face each other.

JP 2011-182139 A

  However, according to the above-described conventional technique, there is a problem that it is necessary to re-lay existing LCXs in a duplicated manner, which is troublesome. Moreover, since the overlapping installation section of LCX becomes long, there existed a problem that it was not efficient.

  When an antenna is used, there is a problem that it is necessary to separately lay an antenna and a cable between the base station and the antenna, which is costly. Further, interference occurs when the radiation from the antenna extends not only in the handover interval but also in a region unrelated to the handover. Therefore, it is necessary to examine the influence on the propagation environment for application, and there is a problem that the advantage of stably obtaining signal power without interference in the LCX communication system is impaired.

  The present invention has been made in view of the above, and it is possible to efficiently receive signals from a plurality of base stations and realize a soft handover by using an existing LCX, a termination device, a relay device, and a base An object is to obtain a station and a wireless communication system.

  In order to solve the above-described problems and achieve the object, the present invention provides the termination device in a wireless communication system including a plurality of base stations, leaky coaxial cables, and termination devices, and the leaky coaxial cables are different from each other. A base station and the termination device are connected, and the base station generates an orthogonal signal between adjacent base stations and transmits the signal to the leaky coaxial cable. An input / output means connected by the leaky coaxial cable and the reverse power feeding means, and a folding means for outputting the signal output from the input / output means to the input / output means. The input / output means outputs an orthogonal signal from the base station input via the leaky coaxial cable to the folding means, and the folding means And outputs it to the leakage coaxial cable quadrature signal folded output Te, characterized in that.

  Advantageous Effects of Invention According to the present invention, there is an effect that soft handover can be realized by efficiently receiving signals from a plurality of base stations while using existing LCX.

FIG. 1 is a diagram showing an image of a change characteristic of a received electric field due to LCX laying and grating. FIG. 2 is a diagram illustrating the directivity of a signal radiated in the signal input direction in LCX. FIG. 3 is a diagram illustrating a configuration example of the wireless communication system according to the first embodiment. FIG. 4 is a diagram illustrating a configuration example of a radio communication system according to the second embodiment. FIG. 5 is a diagram illustrating a configuration example of a wireless communication system according to the third embodiment. FIG. 6 is a diagram illustrating a configuration example of a wireless communication system according to the fourth embodiment. FIG. 7 is a diagram illustrating a configuration example of a wireless communication system according to the fifth embodiment.

  Hereinafter, embodiments of a termination device, a relay device, a base station, and a wireless communication system according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
In the present embodiment, an LCX having a grating is used as a leaky coaxial cable (LCX) in a wireless communication system. First, the grating in LCX and the directivity of the signal radiated from LCX will be briefly described.

  FIG. 1 is a diagram showing an image of a change characteristic of a received electric field due to laying and grating of the LCX 20. In the case of transmitting a signal from the base station 10 to the termination device 30, in the graph shown in FIG. Indicates.

  FIG. 1A is a diagram illustrating received power when a signal from the base station 10 is input to the forward power feeding unit 21 of the LCX 20. The signal input from the base station 10 is radiated from the slit 23 provided in the LCX 20 while being attenuated by being transmitted through the LCX 20. The LCX 20 is configured by connecting and combining LCX (types A, B, and C) cables that reduce the coupling loss as they move away from the base station 10 so that the received electric field of the terminal fluctuates within a certain range. .

  FIG. 1B is a diagram illustrating received power when a signal from the base station 10 is input to the backward feeding unit 22 of the LCX 20. With respect to the signal input from the base station 10, the received electric field of the terminal is rapidly attenuated. This is because a signal from the base station 10 is input from an LCX (type C) with a small coupling loss and transmits an LCX (type B → type A) with a large coupling loss as the distance from the base station 10 increases. However, when a signal is input from the reverse power supply unit 22, a higher received electric field is received at the terminal near the input power supply unit (reverse power supply unit 22) of the LCX 20 than when a signal is input from the forward power supply unit 21. Is obtained.

  FIG. 2 is a diagram illustrating the directivity of a signal radiated with respect to the signal input direction in the LCX 20. In the same wireless communication system as in FIG. 1A, FIG. 2A shows a signal traveling direction 24 input from the base station 10 to the forward power feeding unit 21 of the LCX 20 in a reverse direction from a slit position (not shown). FIG. 2B shows an endfire type having a directivity 26 that radiates a signal in the same traveling direction from a slit position (not shown) with respect to the signal traveling direction 24. Indicates.

  Next, the radio communication system according to the present embodiment will be described. FIG. 3 is a diagram illustrating a configuration example of the wireless communication system 1 according to the present embodiment. The wireless communication system 1 includes base stations 10a and 10b, LCXs 20a and 20b, termination devices 30a and 30b, and a terminal 40. Base station 10a, LCX 20a, and termination device 30a are connected to form one configuration, and base station 10b, LCX 20b, and termination device 30b are connected to form one configuration. In FIG. 1, the number of base stations, LCXs, and termination devices is two, but this is an example, and it is possible to use three or more. In that case, the same configuration as the combination of the base station 10a, the LCX 20a, and the termination device 30a is arranged on the left side of the base station 10a and the right side of the termination device 30b. In FIG. 3, a solid line indicates a signal transmitted from each base station, and a dotted line indicates a signal returned from each terminal device.

  The base station 10a includes an orthogonal signal generation unit 11a that generates orthogonal signals between adjacent base stations and transmits the generated orthogonal signals to the LCX 20a that connects the generated orthogonal signals.

  The LCX 20a includes a forward power feeding unit 21a connected to the base station 10a and a reverse power feeding unit 22a connected to the termination device 30a. As in FIG. 1, the LCX 20a is a leaky coaxial cable (LCX) having a grating effect in which the coupling loss is reduced stepwise due to the characteristics of a plurality of coupling losses in the direction from the forward feeding unit 21a to the backward feeding unit 22a. . Although the slit position is not shown in FIG. 3, signals having directivity 25a and 28a are radiated from the same slit position as in FIG. The LCX 20a emits a signal with a backfire type directivity.

  The termination device 30a includes an input / output unit 31a connected to the LCX 20a, and a folding unit 32a that loops back and outputs the signal output from the input / output unit 31a to the input / output unit 31a. The input / output unit 31a outputs the signal (orthogonal signal) 24a input from the base station 10a via the LCX 20a to the folding unit 32a, and outputs the signal (orthogonal signal) 27a output by the folding unit 32a to the LCX 20a. .

  The terminal 40 can communicate with the base stations 10a and 10b, and is a mobile communication terminal that performs handover between the base stations 10a and 10b by moving.

  1 to 3, the base stations 10, 10a, 10b have the same configuration, the LCXs 20, 20a, 20b have the same configuration, and the termination devices 30, 30a, 30b have the same configuration. In the following description, when it is not necessary to distinguish each configuration, the characters at the end of the code such as a and b are removed from each configuration (for example, the forward power feeding units 21a and 21b are used as the forward power feeding unit 21). ) May explain. Similarly, when it is not necessary to distinguish signals, directivity, etc., which will be described later, the description may be made with the characters at the end of the code such as a and b omitted.

  Next, signals radiated from the LCXs 20a and 20b in the wireless communication system 1 will be described.

  In the base station 10a, the orthogonal signal generation unit 11a transmits a signal (orthogonal signal) 24a to the forward power supply unit 21a of the LCX 20a. The signal 24a is transmitted through the LCX 20a and radiated from the LCX 20a with directivity 25a in the opposite direction to the terminal 40 located in the handover section 50. In the LCX 20a, a high-power signal is radiated to the handover section 51 with an adjacent base station (not shown) by the backfire type directivity 25a in the vicinity of the forward power feeding unit 21a connected to the base station 10a. Is possible. In the LCX 20a, a signal 24a is output from the reverse power feeding unit 22a to the termination device 30a.

  In the termination device 30a, the input / output unit 31a receives the signal 24a and outputs the signal 24a to the folding unit 32a. The folding unit 32a outputs a signal 27a obtained by folding the signal 24a to the input / output unit 31a. The input / output unit 31a transmits the signal 27a returned by the return unit 32a to the reverse power feeding unit 22a of the LCX 20a. The signal 27a is transmitted through the LCX 20a and is emitted from the LCX 20a with directivity 28a in the direction of the terminal 40 located in the handover section 50.

  In the LCX 20a, by inputting the same base station signal from the power supply units at both ends of the LCX 20a, the radiation directivity of both the backfire type and the endfire type is obtained in the vicinity of the reverse power supply unit 22a connected to the termination device 30a. Is possible.

  Also in the base station 10b, LCX 20b, and the termination device 30b, a signal having directivity 25b with respect to the signal 24b is radiated by the same operation as the base station 10a, LCX 20a, and termination device 30a, and directivity with respect to the signal 27b. A signal having 28b is emitted. Thereby, in the LCX 20b, it is possible to radiate a high-power signal to the handover section 50 by the backfire type directivity 25b in the vicinity of the forward power feeding unit 21b connected to the base station 10b. Further, in the LCX 20b, by inputting the same base station signal from the power feeding units at both ends of the LCX 20b, both the backfire type and the endfire type radiation directivities are obtained in the vicinity of the reverse power feeding unit 22b connected to the termination device 30b. Can be obtained.

  Accordingly, the terminal 40 in the handover section 50 can receive a signal from the base station 10a as a signal with directivity 28a from the LCX 20a, and can receive a signal from the base station 10b as a signal with directivity 25b from the LCX 20b. When there is no return of the signal at the termination device 30a, the terminal 40 cannot receive the signal from the base station 10a in a high electric field. When the endfire-type LCX is used to receive a signal from the base station 10a with a high electric field, the terminal 40 can receive a signal from the base station 10a with a high electric field. On the other hand, since the direction of the signal from the base station 10b is opposite to that of the handover section 50, the terminal 40 cannot receive the signal from the base station 10b with a high electric field.

  In the present embodiment, the terminal 40 in the handover section 50 can efficiently secure time for simultaneously receiving signals from the two base stations 10a and 10b in a high electric field by turning back the signal at the terminating device 30a. Therefore, soft handover can be realized.

  Note that when the signal from the base station 10 is turned back to the LCX 20 in the termination device 30, it is difficult to input communicable power to the forward power feeding unit 21 of the LCX 20 because the turned back signal is subjected to reverse grating. Therefore, a backfire type is used for LCX20.

  In the termination device 30, the folding unit 32 may amplify the signal 24 and output the signal 27 to the input / output unit 31. Accordingly, rather than transmitting a high power signal from the base station 10 so that a high received electric field is obtained in the handover section 50, the terminal device 30 transmits the LCX 20 to amplify the power of the signal after the power reduction. And it outputs to LCX20 and there exists an effect that power efficiency can be improved as radio communications system 1.

  Further, as a method for avoiding inter-base station interference for soft handover used in the radio communication system 1 of the present embodiment, in addition to the general time division multiplexing, frequency division multiplexing, and code division multiplexing, each LCX 20 Handover by MIMO (Multiple Input Multiple Output) multiplexing between the base stations 10 is also possible using the fact that the spatial correlation of the propagation path from the terminal to the terminal 40 becomes low.

  When soft handover is performed between base stations 10 by time division multiplexing, MIMO, or the like, synchronization between base stations is assumed to have a function according to necessity, and a method similar to the conventional method may be used, and detailed description thereof is omitted.

  As described above, according to the present embodiment, in the wireless communication system 1 that includes a plurality of base stations 10, LCXs 20, and termination devices 30, and each LCX 20 connects to different base stations 10 and termination devices 30, 10 generates an orthogonal signal between adjacent base stations, and outputs the signal to the forward power feeding unit 21 of the LCX 20. The LCX 20 has a grating effect and emits a signal in a backfire type, while the backward power feeding unit A signal is output from the terminal 22 to the terminal device 30, and the terminal device 30 wraps the signal from the LCX 20 and outputs the signal to the backward feeding unit 22 of the LCX 20. As a result, the terminal 40 in the handover section 50 efficiently secures time to simultaneously receive signals from a plurality of base stations without changing the existing LCX laying method and without using an antenna or the like. And soft handover can be realized.

  In the present embodiment, as a method of inputting the same signal from the forward power feeding unit 21 and the reverse power feeding unit 22, the signal transmitted through the LCX 20 is turned back by the terminating device 30, but the present invention is not limited to this. For example, a signal equivalent to the signal from the base station 10 input from the forward power supply unit 21 may be input by the direct termination device 30 or the reverse power supply unit 22 using another cable, a wireless device, or the like. The implementation configuration is not limited. Note that the present invention can also be applied to a case where LCX that does not have a grating effect is used as a wireless communication system.

Embodiment 2. FIG.
In this embodiment, the base station 10 is connected to the two LCXs 20 by the forward power feeding unit 21, the termination device is connected to the two LCXs 20 by the reverse power feeding unit 22, and the termination device is connected via the two LCXs 20. A radio communication system in which two base stations 10 to be connected are different base stations 10 will be described. In addition, the same code | symbol is attached | subjected about the same structure as above-mentioned embodiment (here Embodiment 1), and description is abbreviate | omitted. The same applies to the following embodiments (Embodiments 3 to 5).

  FIG. 4 is a diagram illustrating a configuration example of the wireless communication system 1a according to the present embodiment. The wireless communication system 1a includes base stations 10a and 10b, LCXs 20c, 20d, 20e, and 20f, a termination device 33, and a terminal 40. The configurations of the LCXs 20c to 20f are the same as those of the LCXs 20a and 20b. In the base station 10a, the orthogonal signal generation unit 11a transmits the generated orthogonal signals to the LCXs 20c and 20d that are connected. In the base station 10b, the orthogonal signal generation unit 11b transmits the generated orthogonal signal to the LCXs 20e and 20f that are connected. In FIG. 4, a solid line indicates a signal transmitted from each base station 10, and a dotted line indicates a signal returned from each terminal device 33.

  The LCX 20c is connected to a terminal device (not shown) similar to the terminal device 33 at the reverse power feeding unit 22c, and radiates a signal of directivity 28c with respect to the signal 27c returned from the terminal device. Further, the LCX 20f is connected to a termination device (not shown) similar to the termination device 33 by the reverse power feeding section 22f, and radiates a signal of directivity 28f with respect to the signal 27f turned back from the termination device.

  The termination device 33 returns the input / output unit 34 connected to the LCX 20d, the input / output unit 35 connected to the LCX 20e, and the signal output from the input / output unit 34 to the input / output unit 34. A folding unit 36 that loops back and outputs the signal output from the input / output unit 35. The input / output unit 34 outputs the signal (orthogonal signal) 24d from the base station 10a input via the LCX 20d to the folding unit 36, and outputs the signal (orthogonal signal) 27d output by the folding unit 36 to the LCX 20d. . The input / output unit 35 outputs the signal (orthogonal signal) 24e from the base station 10b input via the LCX 20e to the folding unit 36, and outputs the signal (orthogonal signal) 27e output by the folding unit 36 to the LCX 20e. .

  Next, signals radiated from the LCXs 20d and 20e in the wireless communication system 1a will be described.

  In the base station 10a, the orthogonal signal generation unit 11a transmits signals (orthogonal signals) 24c and 24d to the forward power supply units 21c and 21d of the LCXs 20c and 20d. The signal 24d is transmitted through the LCX 20d, and is emitted from the LCX 20d with a directivity 25d in the opposite direction to the terminal 40 located in the handover section 52. In the LCX 20d, a high-power signal can be radiated to the LCX branch section 53 by the backfire type directivity 25d in the vicinity of the forward power feeding unit 21d connected to the base station 10a. Also in the LCX 20c, it is possible to radiate a high power signal to the LCX branch section 53 by the backfire type directivity 25c in the vicinity of the forward power feeding unit 21c connected to the base station 10a. . In the LCX 20d, the signal 24d is output from the reverse power feeding unit 22d to the termination device 33.

  In the termination device 33, the input / output unit 34 inputs the signal 24 d and outputs the signal 24 d to the folding unit 36. The folding unit 36 outputs a signal 27 d obtained by folding the signal 24 d to the input / output unit 34. The input / output unit 34 transmits the signal 27d returned by the return unit 36 to the reverse power feeding unit 22d of the LCX 20d. The signal 27d is transmitted through the LCX 20d and is emitted from the LCX 20d with directivity 28d in the direction of the terminal 40 located in the handover section 52.

  In the LCX 20d, by inputting the same base station signal from the power feeding units at both ends of the LCX 20d, the radiation directivity of both the backfire type and the endfire type is obtained in the vicinity of the reverse power feeding unit 22d connected to the termination device 33. Is possible.

  The base station 10b, LCX 20e, 20f, and the termination device 33 perform the same operations as the base station 10a, LCX 20c, 20d, and the termination device 33. When the base station 10b transmits the signals (orthogonal signals) 24e and 24f to the forward feeding units 21e and 21f of the LCXs 20e and 20f, the LCX 20e emits a signal having directivity 25e with respect to the signal 24e, and the signal 27e Thus, a signal having directivity 28e is emitted. Thereby, in the LCX 20e, it is possible to radiate a high power signal to the LCX branch section 54 by the directivity 25e by the backfire type in the vicinity of the forward power feeding unit 21e connected to the base station 10b. . Similarly, in the LCX 20f, it is possible to radiate a high-power signal to the LCX branch section 54 by the directivity 25f by the backfire type in the vicinity of the forward power feeding unit 21f connected to the base station 10b. is there. In addition, in the LCX 20e, by inputting the same base station signal from the power feeding units at both ends of the LCX 20e, the radiation directivity of both the backfire type and the endfire type is obtained in the vicinity of the reverse power feeding unit 22e connected to the termination device 33. Can be obtained.

  Thereby, the terminal 40 in the handover section 52 can receive a signal from the base station 10a as a signal of directivity 28d from the LCX 20d, and can receive a signal from the base station 10b as a signal of directivity 28e from the LCX 20e. If there is no signal folding at the termination device 33, the terminal 40 cannot receive signals from the base stations 10a and 10b in a high electric field. When endfire LCX is used to receive signals from the base stations 10a and 10b with a high electric field, the terminal 40 can receive signals from the base stations 10a and 10b with a high electric field. On the other hand, since the direction of the signal from the base stations 10a and 10b is opposite to the LCX branch sections 53 and 54, the terminal 40 increases the signal from the base stations 10a and 10b in the LCX branch sections 53 and 54. Cannot receive with electric field.

  In the present embodiment, the terminal 40 in the handover section 52 can efficiently secure time for simultaneously receiving signals from the two base stations 10a and 10b in a high electric field by turning back the signal at the termination device 33. Therefore, soft handover can be realized.

  In addition, when the signal from the base station 10 is turned back to the LCX 20 in the termination device 33, reverse turning is applied to the turned back signal, so that it is difficult to input communicable power to the forward power feeding unit 21 of the LCX 20. Therefore, in order to eliminate the low electric field in the LCX branch sections 53 and 54, a backfire type is used for the LCX 20.

  In the termination device 33, the folding unit 36 may amplify the signal 24 and output the signal 27 to the input / output units 34 and 35. Accordingly, rather than transmitting a high power signal from the base station 10 so that a high received electric field is obtained in the handover section 52, the terminal device 33 transmits the LCX 20 and amplifies the power of the signal after the power reduction. And outputting to LCX20 produces the effect that power efficiency can be improved as radio communication system 1a.

  Further, the termination device 33 may be configured to include three or more input / output units. In this case, the folding unit 36 can cope with the signal input from each input / output unit regardless of the number of input / output units by outputting the signal to the input / output unit of the transmission source of the signal.

  Further, the inter-base station interference avoidance method for soft handover used in the radio communication system 1a of the present embodiment is the same as that of the radio communication system 1 of the first embodiment.

  As described above, according to the present embodiment, the base station 10, the LCX 20, and the termination device 33 are provided, and in the wireless communication system 1 a in which each LCX 20 is connected to the base station 10 and the termination device 33, each base station 10 Generates a signal orthogonal between adjacent base stations and outputs the signal to the forward power feeding unit 21 of each LCX 20, and the LCX 20 has a grating effect and emits a signal in a backfire type, while the backward power feeding unit The terminal device 33 outputs a signal to the terminal device 33, and the terminal device 33 wraps the signal from each LCX 20 and outputs it to the reverse power feeding unit 22 of each LCX 20. As a result, the terminal 40 in the handover section 52 efficiently secures time to simultaneously receive signals from a plurality of base stations without changing the existing LCX laying method and without using an antenna or the like. And soft handover can be realized. Note that the present invention can also be applied to a case where LCX that does not have a grating effect is used as a wireless communication system.

Embodiment 3 FIG.
In this embodiment, a radio communication system in which base stations 10 and LCX 20 are alternately connected and the grating direction of LCX 20 is aligned in the same direction will be described.

  FIG. 5 is a diagram illustrating a configuration example of the wireless communication system 1b according to the present embodiment. The wireless communication system 1b includes base stations 10a and 10b, LCXs 20a and 20b, and a terminal 40. Each base station 10 is connected to two LCXs 20, and is connected to one LCX 20 by a forward power feeding unit 21 and connected to the other LCX 20 by a reverse power feeding unit 22. In the base station 10, two adjacent base stations 10 through two LCXs 20 are different base stations 10. In the LCX 20b, it is assumed that a base station 10 (not shown) is connected to the reverse power feeding unit 22b and a signal is input from the base station 10. In FIG. 5, the solid line indicates a signal transmitted from the base station 10a, and the dotted line indicates a signal returned from the base station 10b.

  The LCX 20b is connected to the base station 10 (not shown) by the reverse power feeding unit 22b, and radiates a signal having directivity 28c with respect to the signal 24c from the base station 10. In FIG. 5, an alternate long and short dash line indicates a signal transmitted from the base station 10 (not shown).

  Next, signals emitted from the LCXs 20a and 20b in the wireless communication system 1b will be described.

  In the base station 10a, the orthogonal signal generation unit 11a sends a signal (orthogonal signal) 24a to the forward feeding unit 21a of the LCX 20a and the backward feeding unit 22 of the LCX 20 (LCX arranged on the left side of the LCX 20a in FIG. 5) (not shown). Send. In the LCX 20a, the signal 24a is transmitted through the LCX 20a and emitted from the LCX 20a with a directivity 25a.

  In the base station 10b, the orthogonal signal generation unit 11b transmits a signal (orthogonal signal) 24b to the forward feeding unit 21b of the LCX 20b and the backward feeding unit 22a of the LCX 20a. In the LCX 20a, the signal 24b is transmitted through the LCX 20a and emitted from the LCX 20a with directivity 28b. In the LCX 20b, the signal 24b is transmitted through the LCX 20b and emitted from the LCX 20b with directivity 25b.

  In the LCX 20a, by inputting mutually orthogonal signals from different base stations 10a and 10b from the power feeding units at both ends of the LCX 20a, a backfire type is provided in the vicinity of the reverse power feeding unit 22a (handover section 55) in the laying range of the LCX 20a. Thus, it becomes possible to obtain the radiation directivity of both endfire types.

  Thereby, the terminal 40 in the handover section 55 can receive a signal from the base station 10a as a signal of directivity 25a from the LCX 20a, and can receive a signal from the base station 10b as a signal of directivity 28b from the LCX 20a.

  In the present embodiment, by inputting the signals of the base stations 10a and 10b from both ends of the LCX 20a, the terminal 40 in the handover section 55 has time to simultaneously receive the signals from the two base stations 10a and 10b in a high electric field. Since it can be ensured efficiently, soft handover can be realized.

  The signal power transmitted from the base station 10 may be different for each connected LCX 20. In the present embodiment, in the base station 10a connected to the LCX 20a by the forward power feeding unit 21a, the transmission signal power of the signal 24a transmitted to the LCX 20a is attenuated by the grating characteristic, and therefore, the terminal 40 from the end of the LCX 20a to the end. Then, the signal 24a is output with power that can provide a necessary electric field.

  Similarly, in the base station 10b connected to the LCX 20b by the forward power supply unit 21b, the transmission signal power of the signal 24b transmitted to the LCX 20b is attenuated by the grating characteristic, and thus is necessary at the terminal 40 from end to end of the LCX 20b. The signal 24b is output with power that can generate an electric field. On the other hand, in the base station 10b connected to the LCX 20a in the reverse power feeding unit 22a, the transmission signal power of the signal 24b transmitted to the LCX 20a is attenuated by the reverse grating characteristic. Therefore, the transmission signal power of the signal transmitted to the LCX 20a is In a section necessary for handover, the terminal 40 outputs a signal with power that can secure a received electric field.

  As a result, the base station 10 can obtain a handover system with good power efficiency by adjusting the signal power according to the power attenuation characteristics of the connected LCX 20. Further, the base station 10 adjusts the transmission signal power to obtain a section required for soft handover in other sections such as the center of each base station 10 instead of the vicinity of the reverse power feeding unit 22 of the LCX 20. be able to.

  Further, the inter-base station interference avoidance method for soft handover used in the radio communication system 1b of the present embodiment is the same as that of the radio communication system 1 of the first embodiment and the radio communication system 1a of the second embodiment.

  As described above, according to the present embodiment, in the radio communication system 1b in which the base stations 10 and the LCXs 20 are alternately connected, the base station 10 generates orthogonal signals between adjacent base stations, The LCX 20 outputs to the forward power feeding unit 21, and the other LCX 20 outputs to the reverse power feeding unit 22. As a result, the terminal 40 in the handover section 55 efficiently secures time to simultaneously receive signals from a plurality of base stations without changing the existing LCX laying method and without using an antenna or the like. And soft handover can be realized. Note that the present invention can also be applied to a case where LCX that does not have a grating effect is used as a wireless communication system.

Embodiment 4 FIG.
In the present embodiment, a base station 10 is connected to two LCXs 20 by a forward power feeding unit 21, and the LCX 20 is connected to an LCX 20 connected to an adjacent base station 10 and a backward power feeding unit 22 to each other. explain.

  FIG. 6 is a diagram illustrating a configuration example of the wireless communication system 1c according to the present embodiment. The wireless communication system 1c includes base stations 10a and 10b, LCXs 20c, 20d, 20e, and 20f, and a terminal 40. In the wireless communication system 1a (see FIG. 4) according to the second embodiment, the terminating device 33 is deleted, and the backward feeding unit 22d of the LCX 20d and the backward feeding unit 22e of the LCX 20e are connected.

  In the LCX 20c, it is assumed that the signal 24b transmitted from the base station 10 (not shown) is input to the reverse power feeding unit 22c via the LCX 20 (not shown), and the signal 24b is radiated with the directivity 25b. In the LCX 20f, it is assumed that the signal 24g transmitted from the base station 10 (not shown) is input to the reverse power feeding unit 22f via the LCX 20 (not shown), and the signal 24g is radiated with directivity 25g. In FIG. 6, a solid line indicates a signal transmitted from the base station 10a, a dotted line indicates a signal returned from the base station 10b, and a one-dot chain line indicates a signal transmitted from the base station 10 (not shown). Further, the effect on the LCX branch sections 53 and 54 in FIG.

  Next, signals radiated from the LCXs 20d and 20e in the wireless communication system 1c will be described.

  In the base station 10a, the orthogonal signal generation unit 11a transmits signals (orthogonal signals) 24c and 24d to the forward power supply units 21c and 21d of the LCXs 20c and 20d. The signal 24d is transmitted through the LCX 20d and is emitted from the LCX 20d with a directivity 25d in the opposite direction to the terminal 40 located in the handover section 56. In the LCX 20d, a signal 24d is output from the backward feeding unit 22d to the backward feeding unit 22e of the LCX 20e. The signal 24d is transmitted through the LCX 20e and radiated toward the handover section 56 by the directivity 25d of the backfire type.

  Similarly, in the base station 10b, the orthogonal signal generation unit 11b transmits signals (orthogonal signals) 24e and 24f to the forward power supply units 21e and 21f of the LCXs 20e and 20f. The signal 24e is transmitted through the LCX 20e, and is emitted from the LCX 20e with directivity 25e in the opposite direction to the terminal 40 located in the handover section 56. In the LCX 20e, the signal 24e is output from the backward feeding unit 22e to the backward feeding unit 22d of the LCX 20d. The signal 24e is transmitted through the LCX 20d and radiated toward the handover section 56 by the directivity 25e of the backfire type.

  Thus, in the LCX 20d, the signal 24d from the base station 10a is input from the forward power supply unit 21d, and the signal 24e from the base station 10b adjacent to the base station 10a is input from the reverse power supply unit 22d. In the LCX 20e, the signal 24e from the base station 10b is input from the forward power supply unit 21e, and the signal 24d from the base station 10a adjacent to the base station 10b is input from the reverse power supply unit 22e.

  When signals from different base stations 10a and 10b are input at different power feeding units, the signals 24d and 24e having two different traveling directions are input to each LCX 20d and 20e, and each signal input from each power feeding unit Radiate signals with different directivities 25d and 25e. At this time, signals from different base stations 10a and 10b are radiated within the laying range of the LCXs 20d and 20e, and a handover section 56 is formed.

  As a result, the terminal 40 in the handover section 56 can receive a signal from the base station 10a as a signal with the directivity 25d from the LCX 20d and 20e, and a signal from the base station 10b as a signal with the directivity 25e from the LCX 20d and 20e. Can receive.

  In the present embodiment, by connecting the LCXs 20d and 20e with the reverse power feeding units 22d and 22e, the terminal 40 in the handover section 56 receives the signals from the two base stations 10a and 10b simultaneously in a high electric field. Can be efficiently secured, so that soft handover can be realized.

  In the present embodiment, the connection method of the LCXs 20 laid adjacent to each other in the opposite direction feeding unit 22 may be direct connection or may be connected by some other cable. The connection method is not limited as long as transmission signals from two different base stations 10 can be input to the LCX 20 from different power feeding units.

  Further, the inter-base station interference avoidance method for soft handover used in the radio communication system 1c of the present embodiment is the same as that of the radio communication systems 1 to 1b of the first to third embodiments.

  As described above, according to the present embodiment, a plurality of base stations 10 and LCXs 20 are provided, each base station 10 is connected to LCX 20 by forward power feeding unit 21, and LCX 20 is connected to adjacent base station 10. In the wireless communication system 1c connected between the LCX 20 and the reverse power feeding units 22, the base station 10 generates signals orthogonal to each other between adjacent base stations, and outputs the signals to the forward power feeding unit 21 of the LCX 20, and the LCX 20 In the LCX 20 connected to the adjacent base station 10, the signal is output from the reverse power feeding unit 22 to the LCX 20 connected to the adjacent base station 10 while radiating the signal in the backfire type. The signal was emitted by the mold. As a result, the terminal 40 in the handover section 56 efficiently secures time to simultaneously receive signals from a plurality of base stations without changing the existing LCX laying method and without using an antenna or the like. And soft handover can be realized. Note that the present invention can also be applied to a case where LCX that does not have a grating effect is used as a wireless communication system.

Embodiment 5 FIG.
In the present embodiment, the base station 10 is connected to the two LCXs 20 by the forward power feeding unit 21, the relay device is connected to the two LCXs 20 by the reverse power feeding unit 22, and the relay device is connected via the two LCXs 20. A radio communication system in which two base stations 10 to be connected are different base stations 10 will be described.

  FIG. 7 is a diagram illustrating a configuration example of the wireless communication system 1d according to the present embodiment. The wireless communication system 1d includes base stations 10a and 10b, LCXs 20c, 20d, 20e, and 20f, a relay device 60, and a terminal 40. In the wireless communication system 1a (see FIG. 4) according to the second embodiment, the termination device 33 is deleted and the relay device 60 is added.

  The relay device 60 has an input / output unit 61 connected to the LCX 20d, an input / output unit 62 connected to the LCX 20e, and an output direction determination that determines that a signal input from one input / output unit is output to the other input / output unit. Unit 63. The input / output unit 61 outputs the orthogonal signal from the base station 10a input via the LCX 20d to the output direction determining unit 63, and outputs the orthogonal signal from the base station 10b output from the output direction determining unit 63 to the LCX 20d. . The input / output unit 62 outputs the orthogonal signal from the base station 10b input via the LCX 20e to the output direction determining unit 63, and outputs the orthogonal signal from the base station 10a output from the output direction determining unit 63 to the LCX 20e. . The output direction determination unit 63 outputs the signal output from the input / output unit 61 to the input / output unit 62, and outputs the signal output from the input / output unit 62 to the input / output unit 61.

  In the LCX 20c, it is assumed that the signal 24b transmitted from the base station 10 (not shown) is input to the reverse power feeding unit 22c via the LCX 20 (not shown), and the signal 24b is radiated with the directivity 25b. In the LCX 20f, it is assumed that the signal 24g transmitted from the base station 10 (not shown) is input to the reverse power feeding unit 22f via the LCX 20 (not shown), and the signal 24g is radiated with directivity 25g. In FIG. 7, a solid line indicates a signal transmitted from the base station 10a, a dotted line indicates a signal returned from the base station 10b, and a one-dot chain line indicates a signal transmitted from the base station 10 (not shown). Further, the effect on the LCX branch sections 53 and 54 in FIG.

  Next, signals emitted from the LCXs 20d and 20e in the wireless communication system 1d will be described.

  In the base station 10a, the orthogonal signal generation unit 11a transmits signals (orthogonal signals) 24c and 24d to the forward power supply units 21c and 21d of the LCXs 20c and 20d. The signal 24d is transmitted through the LCX 20d and radiated from the LCX 20d with a directivity 25d in the opposite direction to the terminal 40 located in the handover section 57. In the LCX 20d, a signal 24d is output from the reverse power feeding unit 22d to the relay device 60.

  In the relay device 60, the input / output unit 61 inputs the signal 24 d and outputs the signal 24 d to the output direction determination unit 63. The output direction determination unit 63 outputs the signal 24 d to the input / output unit 62. The input / output unit 62 transmits the signal 24d to the backward feeding unit 22e of the LCX 20e. The signal 24d is transmitted through the LCX 20e and emitted from the LCX 20e with a directivity 25d in the direction of the terminal 40 located in the handover section 57.

  Similarly, in the base station 10b, the orthogonal signal generation unit 11b transmits signals (orthogonal signals) 24e and 24f to the forward power supply units 21e and 21f of the LCXs 20e and 20f. The signal 24e is transmitted through the LCX 20e, and is emitted from the LCX 20e with a directivity 25e in the opposite direction to the terminal 40 located in the handover section 57. In the LCX 20e, the signal 24e is output from the reverse power feeding unit 22e to the relay device 60.

  In the relay device 60, the input / output unit 62 receives the signal 24 e and outputs the signal 24 e to the output direction determination unit 63. The output direction determination unit 63 outputs the signal 24e to the input / output unit 61. The input / output unit 61 transmits the signal 24e to the backward feeding unit 22d of the LCX 20d. The signal 24e is transmitted through the LCX 20d and is emitted from the LCX 20d with directivity 25e in the direction of the terminal 40 located in the handover section 57.

  Thus, in the LCX 20d, the signal 24d from the base station 10a is input from the forward power supply unit 21d, and the signal 24e from the base station 10b adjacent to the base station 10a is input from the reverse power supply unit 22d. In the LCX 20e, the signal 24e from the base station 10b is input from the forward power supply unit 21e, and the signal 24d from the base station 10a adjacent to the base station 10b is input from the reverse power supply unit 22e.

  When signals from different base stations 10a and 10b are input at different power feeding units, the signals 24d and 24e having two different traveling directions are input to each LCX 20d and 20e, and each signal input from each power feeding unit Radiate signals with different directivities 25d and 25e. At this time, signals from different base stations 10a and 10b are radiated within the laying range of the LCXs 20d and 20e, and a handover section 57 is formed.

  As a result, the terminal 40 in the handover section 57 can receive the signal from the base station 10a as a signal with the directivity 25d from the LCX 20d and 20e, and the signal from the base station 10b as the signal with the directivity 25e from the LCX 20d and 20e. Can receive.

  In the present embodiment, the terminal 40 in the handover section 57 outputs the signals from the two base stations 10a and 10b in a high electric field by outputting the signal input by the relay device 60 to the LCX 20 on the other base station 10 side. Since it is possible to efficiently secure the time for simultaneous reception, soft handover can be realized.

  In the relay device 60, the output direction determination unit 63 may amplify the signal 24 from one or both input / output units and output it to the other input / output unit. Thereby, rather than transmitting a high power signal from the base station 10 so that a high received electric field can be obtained in the handover section 57, the relay device 60 transmits the LCX 20 and amplifies the power of the signal after the power reduction. And outputting to LCX20 produces the effect that power efficiency can be improved as radio | wireless communications system 1d.

  Further, the relay device 60 may be configured to include three or more input / output units. In this case, the output direction determination unit 63 uniquely determines in advance by setting etc. which input / output unit the signal input from which output is output to which input / output unit. Can respond.

  In the relay device 60, the output direction determination unit 63 outputs the uplink signal from the terminal 40 from the LCX 20 connected to the handover source base station 10 to the LCX 20 connected to the handover destination base station 10. Thus, the output destination may be determined.

  Further, the inter-base station interference avoidance method for soft handover used in the radio communication system 1d of the present embodiment is the same as that of the radio communication systems 1 to 1c of the first to fourth embodiments.

  As described above, according to the present embodiment, the base station 10 includes a plurality of base stations 10, LCXs 20 and relay apparatuses 60, and each LCX 20 is connected to the base station 10 and the relay apparatus 60. , Generate signals orthogonal to each other between adjacent base stations, and output the signals to the forward power feeding unit 21 of the LCX 20. The LCX 20 has a grating effect and emits a signal in a backfire type, while the backward power feeding unit 22 The relay apparatus 60 outputs a signal to the relay apparatus 60, and the relay apparatus 60 outputs the signal from the LCX 20 to the backward feeding unit 22 of the LCX 20 connected to the adjacent base station 10. As a result, the terminal 40 in the handover section 57 efficiently secures time to simultaneously receive signals from a plurality of base stations without changing the existing LCX laying method and without using an antenna or the like. And soft handover can be realized. Note that the present invention can also be applied to a case where LCX that does not have a grating effect is used as a wireless communication system.

  As described above, the termination device, relay device, base station, and wireless communication system according to the present invention are useful for wireless communication, and are particularly suitable for soft handover.

  1, 1a, 1b, 1c, 1d Wireless communication system 10, 10a, 10b Base station, 11a, 11b Orthogonal signal generator, 20, 20a, 20b, 20c, 20d, 20e, 20f LCX, 30a, 30b, 33 Termination Device, 31a, 31b, 34, 35 Input / output unit, 32a, 32b, 36 Folding unit, 40 terminal, 60 Relay device, 61, 62 Input / output unit, 63 Output direction determining unit.

Claims (23)

A termination device in a wireless communication system comprising a plurality of base stations, leaky coaxial cables and termination devices,
Each leaky coaxial cable is connected to the different base station and the termination device, and the base station generates an orthogonal signal between adjacent base stations and transmits the signal to the leaky coaxial cable. When provided with a forward power supply means and a reverse power supply means,
Input / output means for connecting the leaky coaxial cable with the reverse power feeding means,
A return means for returning the signal output from the input / output means to the input / output means;
With
The input / output means outputs the orthogonal signal from the base station input via the leaky coaxial cable to the return means, and outputs the orthogonal signal returned by the return means to the leaky coaxial cable;
An end device characterized by that. A termination device in a wireless communication system comprising a plurality of base stations, leaky coaxial cables and termination devices,
Each leaky coaxial cable is connected to the base station and the termination device, and the base station generates an orthogonal signal between adjacent base stations and transmits the signal to the leaky coaxial cable. When provided with a power feeding means and a reverse power feeding means,
It can be connected to two or more leaky coaxial cables,
Input / output means connected to one leaky coaxial cable with the reverse power feeding means, and more than the number of leaky coaxial cables to be connected;
A return means for returning the signal output from the input / output means to the input / output means of the signal output source;
With
The input / output means outputs the orthogonal signal from the base station input via the leaky coaxial cable to the return means, and outputs the orthogonal signal returned by the return means to the leaky coaxial cable;
An end device characterized by that. The leaky coaxial cable has a grating effect in which the coupling loss is reduced stepwise due to the characteristics of two or more coupling losses in the direction from the forward feeding unit to the backward feeding unit.
The terminal device according to claim 1, wherein the terminal device is a terminal device. The folding means amplifies and outputs the signal from the input / output means,
The termination device according to claim 1, 2, or 3. The relay device in a wireless communication system comprising a plurality of base stations, leaky coaxial cables and relay devices,
Each leaky coaxial cable is connected to the base station and the relay device, and the base station generates an orthogonal signal between adjacent base stations and transmits the signal to the leaky coaxial cable. When provided with a power feeding means and a reverse power feeding means,
It can be connected to two or more leaky coaxial cables,
More than the number of leaky coaxial cables connected to one leaky coaxial cable by the reverse power feeding means,
Output direction determining means for outputting the signal output from the input / output means to other input / output means other than the signal output source;
With
The input / output means outputs the orthogonal signal from the base station input via the leaky coaxial cable to the output direction determining means, and outputs the orthogonal signal output from the output direction determining means to the leaky coaxial cable. To
A relay device characterized by that. The leaky coaxial cable has a grating effect in which the coupling loss is reduced stepwise due to the characteristics of two or more coupling losses in the direction from the forward feeding unit to the backward feeding unit.
The relay device according to claim 5. The output direction determining means amplifies and outputs the signal from the input / output means;
The relay apparatus according to claim 5, wherein the relay apparatus is a relay apparatus. In the radio communication system including a plurality of base stations and leaky coaxial cables, the base station is connected to one or more leaky coaxial cables,
An orthogonal signal generating means for generating an orthogonal signal between adjacent base stations and transmitting the generated orthogonal signal to the leaky coaxial cable;
A base station comprising: In the case where the leaky coaxial cable includes a forward feeding unit and a backward feeding unit,
The orthogonal signal generation means has a different value between a transmission signal power value to the leaky coaxial cable connected by the forward power supply means and a transmission signal power value to the leaky coaxial cable connected by the reverse power supply means. And
The base station according to claim 8. The leaky coaxial cable has a grating effect in which the coupling loss is reduced stepwise due to the characteristics of two or more coupling losses in the direction from the forward feeding unit to the backward feeding unit.
The base station according to claim 9. The orthogonal signal generation means generates an orthogonal signal that is orthogonal in any one of time, frequency, or code between adjacent base stations.
The base station according to claim 8, 9 or 10. The orthogonal signal generation means generates an orthogonal signal separable by MIMO between adjacent base stations.
The base station according to any one of claims 8 to 11, characterized in that: A wireless communication system comprising a plurality of base stations, leaky coaxial cables and termination devices,
Each leaky coaxial cable is connected to the different base station and the termination device,
The base station
An orthogonal signal generating means for generating an orthogonal signal between adjacent base stations and transmitting the generated orthogonal signal to the leaky coaxial cable;
With
The leaky coaxial cable is
Forward power feeding means connected to the base station;
Reverse power feeding means connected to the termination device;
With
The terminator is
Input / output means connected to the leaky coaxial cable;
A return means for returning the signal output from the input / output means to the input / output means;
With
The input / output means outputs the orthogonal signal from the base station input via the leaky coaxial cable to the return means, and outputs the orthogonal signal returned by the return means to the leaky coaxial cable;
A wireless communication system. A wireless communication system comprising a plurality of base stations, leaky coaxial cables and termination devices,
Each leaky coaxial cable is connected to the base station and the termination device, and the base station and the termination device can be connected to two or more leaky coaxial cables,
The base station
Orthogonal signal generation means for generating orthogonal signals between adjacent base stations and transmitting the signals to the leaky coaxial cables connecting the generated orthogonal signals;
With
The leaky coaxial cable is
Forward power feeding means connected to the base station;
Reverse power feeding means connected to the termination device;
With
The terminator is
Input / output means to connect to one leaky coaxial cable, more than the number of leaky coaxial cables to be connected,
A return means for returning the signal output from the input / output means to the input / output means of the signal output source;
With
The input / output means outputs the orthogonal signal from the base station input via the leaky coaxial cable to the return means, and outputs the orthogonal signal returned by the return means to the leaky coaxial cable;
A wireless communication system. A wireless communication system comprising a plurality of base stations and leaky coaxial cables,
Each leaky coaxial cable is connected to the base station at both ends, and the base station can be connected to two or more leaky coaxial cables;
The base station
Orthogonal signal generation means for generating orthogonal signals between adjacent base stations and transmitting the signals to the leaky coaxial cables connecting the generated orthogonal signals;
With
The leaky coaxial cable is
Forward power feeding means connected to the base station;
Reverse power supply means for connecting to a base station different from the base station connected by the forward power supply means;
With
The base station
One or more leaky coaxial cables are connected by the forward feed means, and one or more leaky coaxial cables are connected by the reverse feed means, which are different from the leaky coaxial cables connected by the forward feed means. ,
A wireless communication system. A wireless communication system comprising a plurality of base stations and leaky coaxial cables,
Each leaky coaxial cable is connected to the base station on the one hand and connected to another leaky coaxial cable on the other, and the base station can be connected to two or more leaky coaxial cables;
The base station
Orthogonal signal generation means for generating orthogonal signals between adjacent base stations and transmitting the signals to the leaky coaxial cables connecting the generated orthogonal signals;
With
The leaky coaxial cable is
Forward power feeding means connected to the base station;
Reverse power feeding means connected to the other leaky coaxial cable;
With
The orthogonal signal input from the base station by the forward power supply means is output to another leaky coaxial cable connected by the reverse power supply means.
A wireless communication system. A wireless communication system comprising a plurality of base stations, leaky coaxial cables and relay devices,
Each leaky coaxial cable is connected to the base station and the relay device, and the base station and the relay device can be connected to two or more leaky coaxial cables,
The base station
Orthogonal signal generation means for generating orthogonal signals between adjacent base stations and transmitting the signals to the leaky coaxial cables connecting the generated orthogonal signals;
With
The leaky coaxial cable is
Forward power feeding means connected to the base station;
Reverse power feeding means connected to the relay device;
With
The relay device is
Input / output means to connect to one leaky coaxial cable, more than the number of leaky coaxial cables to be connected,
Output direction determining means for outputting the signal output from the input / output means to other input / output means other than the signal output source;
With
The input / output means outputs the orthogonal signal from the base station input via the leaky coaxial cable to the output direction determining means, and outputs the orthogonal signal output from the output direction determining means to the leaky coaxial cable. To
A wireless communication system. The folding means amplifies and outputs the signal from the input / output means,
The wireless communication system according to claim 13 or 14, characterized in that: The orthogonal signal generation means has a different value between a transmission signal power value to the leaky coaxial cable connected by the forward power supply means and a transmission signal power value to the leaky coaxial cable connected by the reverse power supply means. And
The wireless communication system according to claim 15. The output direction determining means amplifies and outputs the signal from the input / output means;
The wireless communication system according to claim 17. The orthogonal signal generation means generates an orthogonal signal that is orthogonal in any one of time, frequency, or code between adjacent base stations.
The wireless communication system according to claim 13, wherein the wireless communication system is a wireless communication system. The orthogonal signal generation means generates an orthogonal signal separable by MIMO between adjacent base stations.
The wireless communication system according to any one of claims 13 to 21, characterized in that The leaky coaxial cable has a grating effect in which the coupling loss is reduced stepwise due to the characteristics of two or more coupling losses in the direction from the forward feeding unit to the backward feeding unit.
The wireless communication system according to claim 13, wherein the wireless communication system is a wireless communication system.

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