JP2002084221A - Wireless relay device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless relay device incorporating a plurality of wireless units in a wireless communication system that can more efficiently utilize the built-in wireless devices. SOLUTION: A wireless relay device 100 comprises a wireless channel designation control section 28, a multiplex processing section 29, and a relay control section 30 or the like that makes channel connection or the like for a wireless device. The wireless channel designation control section 28 conducts designation/ control of wireless channels at call in and call out. Furthermore, the multiplex processing section 29 conducts multiplex processing in response to the multiplex system in use. The relay control section 30 conducts connection of a wireless channel in one wireless devices and/or connection of a wireless channel among different wireless devices. The communications between mobile stations and/or base stations using an antenna 33, the communications between mobile stations and/or base stations using an antenna 34 and the communications between the antennas 33 and 34 are attained in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio relay apparatus incorporating a plurality of radios in a radio communication system.
In particular, the present invention relates to a relay device that enables a built-in wireless device to be used more efficiently.

[0002]

2. Description of the Related Art FIG. 8 shows a configuration example of a conventional system including a wireless relay device having two wireless devices.

[0003] The system shown in FIG. 8 includes a mobile station or a base station (A).
(Station, station B) 13 and 14 and the wireless relay device 10.

[0004] The wireless relay device 10 includes a station A-side wireless device 21,
B station side radio device 22 and radio line designation control units 23, 24,
It comprises multiplexing processing units 25 and 26 for performing multiplexing processing, a relay control unit 27 for performing circuit switching of radio equipment, etc., antennas 31 and 32, and antenna changeover switches (SW) 37 and 38.

[0005] The radio line designation controllers 23 and 24 always
We are monitoring the line, for example, when making or receiving a call,
Assign a free line. The multiplex processing unit 2
5, 26 perform multiplexing processing according to a multiplexing method described later. The relay control unit 27 connects the line of the wireless device 21 and the wireless device 2
2 is connected.

[0006] The wireless device 21 includes a modem 41 and a SW 37.
, And communicates with the A station 13 via the wireless line 11 under the control of the wireless line designation control unit 23. Similarly, the radio 22 is connected to the modem 42 and the SW
It is connected to the antenna 32 via 38 and communicates with the B station 14 on the wireless line 12 under the control of the wireless line designation control unit 24. Further, under the control of the relay control unit, line connection (when there are a plurality of lines, it can be said that they are exchanged) is performed, and A
Communication between the station 13 and the station B 14 becomes possible.

As described above, the relay device 10 relays the communication between the station A 13 and the station B 14, so that the station B 14 in a place where the radio wave from the station A 13 does not directly reach can provide more stable communication. Can be performed.

Incidentally, the antennas 31 and 32 may be shared by one antenna using an antenna duplexer or the like. Further, the number of mobile stations or base stations is not limited to two, that is, station A and station B, and two or more mobile stations or base stations are possible, and a plurality of wireless devices can be provided for each direction. Also, various multiple access schemes are used.

Here, a description will be given of a typical multiple access system used in a wireless relay apparatus.

[0010] FDMA (Frequency Division Multipl
e Access: frequency division multiple access), TDMA (Tim
e Division Multiple Access: CDMA (Code Division Multiple Access)
Code division multiple access) is used as a multiple access system.

FIG. 1 shows an FD in the FDMA multiple access system.
1 shows an example of a conceptual diagram of an MA wireless system.

FIG. 1A shows a setting method of frequency division multiplexing. The band to be used (system bandwidth) is frequency-divided into a plurality of radio lines by N to perform multiplexing. Each divided frequency forms a channel (line).

FIG. 1B is a conceptual diagram of a system in the FDMA multiple access system. Mobile station or base station (station A,
Station B ... N station) communicates with a fixed station, another mobile station, a base station (station A, station B ... N station, etc.) via the relay device 10F. The relay device 10F is a radio device 20F provided for each direction.
Has ₁ ～20F _N and the relay control unit 27F, radio _20F 1 ～20F and _N, the mobile station or the base station (A station, B station ... N station), but the allocated frequency channels (channels 1 To channel N).

FIG. 2 shows a TD in the TDMA multiple access system.
1 shows an example of a conceptual diagram of an MA wireless system.

FIG. 2A shows a method of setting time division multiplexing. A given time (frame) that occurs periodically over a number of time intervals (time slots) using the entire system bandwidth
And uses individual time slots for wireless communication lines (channels). In the figure, channels are set with four time slots and four frequencies. Theoretically, 16 channels can be assigned, but in the figure,
Eight channels are allocated so that no channels are allocated to adjacent time slots or frequencies.

FIG. 2B is a conceptual diagram of a system in the TDMA multiple access system. Mobile station or base station (A1 to
Stations A4, B1 to B4,..., N) are fixed stations, other mobile stations or base stations (A1 to A4 stations,
B1 to B4 stations... N stations). Relay device 10
T has radio units 20T _{1 to} 20T _N and a relay control unit 27T provided for each direction, and the radio units 20T _{1 to} 20T _N
And mobile stations or base stations (A1 to A4 stations, B1 to B4 stations ...
N stations) perform communication using the assigned channels (channel 1 to channel N).

FIG. 3 shows a CD in the CDMA multiple access system.
1 shows an example of a conceptual diagram of an MA wireless system.

FIG. 3A shows a method of setting code division multiplexing. This is a method in which a wideband wireless line is shared by a plurality of users within the system bandwidth, and each user performs communication using spreading codes orthogonal to each other. The orthogonal spreading codes correspond to channels.

FIG. 3B is a conceptual diagram of a system in the CDMA multiple access system. Mobile station or base station (A1 to
Stations A3, B1 to B3... N stations) are fixed stations, other mobile stations or base stations (A1 to A3 stations,
B1 to B3 stations ... N stations, etc.). Relay device 10
C has a radio _20C 1 _{~20C N} and the relay control unit 27C provided in each direction, radio _20C 1 _{~20C N}
And mobile stations or base stations (A1 to A3 stations, B1 to B3 stations ...
N stations) and the assigned spreading code (channel 1
To channel N).

As a conventional example, PHS (Personal Hand)
Here is a specific example in the y-phone System).

The PHS wireless relay device is a public base station (C
S) and one that relays between PHS terminals (PS) (public line relay) and one that relays between PS and PS (extension relay). The former includes a repeater type CS and a P-link Station (PLS), and the latter includes a master unit of a digital cordless phone.

The above two types of relaying functions, and 64kb
FIG. 9 shows an example of realizing the ps communication.

[0023] The system of FIG. 9, CS6, _PS7 1 ~P
And a S7 _4, 2TRX radio relay device 9.

The 2TRX wireless relay device 9 includes a call processing control unit 1, a call processing control unit 2, TRX1 (3), and TRX2 (4).
And a relay control unit 5.

The call processing control unit 1 controls the TRX 1 so as to set a radio channel with the CS. The call processing control unit 2
The TRX 2 is controlled so as to set a wireless line with S. The relay control unit 5 has a function of exchanging assigned slots.

[0026] In figures, in CS6 and PS7 _1, communication is 64kbps is carried out, with CS6 and PS7 _2, communication 32kbps is carried out.

Of the four time slots (lines) available between CS and TRX1, time slots 1, 3, 4
Is used. In other words, 64kb between CS6 and PS7 ₁
for communication with ps, the time slot 1 and 3 are used, the time slot 4 are used for communication at 32kbps with CS6 and PS7 _2. Time slot 2 is
It is an unused channel.

Of the four time slots (lines) usable between the PS 7 ₁ , PS 7 ₂ and TRX ₂ , time slots 5, 7 and 8 are used. That is, CS6 and PS
Time slot 5 for communication at 64 kbps between 7 ₁
If 7 is used, the time slot 8 are used for communication at 32kbps with CS6 and PS7 _2. Time slot 6 is an unused channel that is not used.

[0029]

[0009] As shown in FIG.
In S6 and PS7 _1, communication is 64kbps is carried out, with CS6 and PS7 _2, when the communication 32kbps is being performed can not extension relay between ₃ and PS7 ₄ other PS7. This is because there is only one vacant time slot in TRX2, so that a radio line cannot be set and extension relay is disabled.

However, there is a problem that one time slot is vacant in each of TRX1 and TRX2, and the radio is not effectively utilized.

Generally speaking, if relaying beyond the capacity of one wireless device is to be performed, such as return communication on the same station, a wireless line is provided to a wireless device prepared for another area station. Although there is room for setting, there is a problem that a call is lost due to an inability to set a wireless device and a wireless line.

The present invention has been made in view of the above problems, and has as its object to use a built-in wireless device more efficiently in a wireless relay apparatus having a plurality of built-in wireless devices in a wireless communication system. It is.

[0033]

In order to solve the above problems, the present invention employs means for solving the problems having the following features.

According to a first aspect of the present invention, in a wireless relay apparatus incorporating a plurality of wireless devices in a wireless communication system, switching and control of a wireless line used by the wireless devices are performed, and the wireless communication device is shared by different wireless devices. It is characterized by having line switching control means provided and line relay means for connecting and relaying the wireless line so that predetermined communication is performed.

According to the first aspect of the present invention, switching and control of a wireless line used by a wireless device are performed, and wireless switching is performed so that predetermined communication is performed with a line switching control unit commonly provided for different wireless devices. By having the line relay means for connecting and relaying the line, the built-in wireless device can be used more efficiently in a wireless relay device having a plurality of built-in wireless devices.

According to a second aspect of the present invention, in the wireless relay apparatus according to the first aspect, the line switching control means switches and controls the wireless lines of all the plurality of wireless devices. .

According to the second aspect of the present invention, the line switching control means switches and controls the wireless lines of all the plurality of built-in wireless devices, so that the communication resources are more effective for each wireless device. It switches and controls the optimal wireless line so that it can be used. As a result, the degree of freedom in setting the line can be increased.

According to a third aspect of the present invention, in the wireless relay device according to the first or second aspect, each of the wireless devices has a plurality of wireless lines, and the line relay means is provided in one wireless device. It is characterized in that connection of a wireless line and / or connection of a wireless line between different wireless devices are performed.

According to the third aspect of the present invention, the line relay means connects a wireless line in one wireless device and / or connects a wireless line between different wireless devices, so that the relay source side and the relayed It is possible to set up a plurality of wireless channels by freely sharing the wireless channel resources of the wireless devices without being limited to the wireless device. As a result, the division loss of the number of settable wireless lines, which has been caused by fixing the communication partner station for each wireless device, is reduced, and the number of settable wireless lines of the wireless device can be used effectively. .

According to a fourth aspect of the present invention, in the wireless relay apparatus according to any one of the first to third aspects, the wireless relay apparatus further includes a modem and a multiplex processing unit, and the modem includes the multiplex processing unit. It corresponds to one or more types of multiplexing systems processed in.

According to the fourth aspect of the present invention, since the modem supports one or more types of multiplexing systems processed by the multiplexing processing unit, the radio relay apparatus can be used in a plurality of multiplexing system systems. Can respond.

According to a fifth aspect of the present invention, in the wireless relay device according to the fourth aspect, the multiplex processing section performs one or more types of multiplex processing.

According to the fifth aspect of the present invention, the multiplexing processing section performs one or more types of multiplexing processing, so that the wireless relay apparatus can efficiently cope with a plurality of multiplexing systems. .

According to a sixth aspect of the present invention, in the wireless relay device according to any one of the first to fifth aspects, an antenna switch is provided, and the line switching control means includes:
The antenna switch is controlled so as to connect the wireless device and the antenna in accordance with the assigned wireless line.

According to the sixth aspect of the present invention, the line switching control means controls the antenna changeover switch so as to connect the radio and the antenna corresponding to the assigned radio line, so that unnecessary radio waves are controlled. And transmission and reception can be performed efficiently.

[0046]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 4 shows an outline of a system configuration example of the present invention.

The system of FIG. 4 uses a mobile station or a base station (A
(Station, station B) 13 and 14 and a radio relay apparatus 100.

The radio relay apparatus 100 is used to specify a radio line.
A radio channel designation control unit 28 for performing control, a multiplex processing unit 29 for performing multiplexing processing, a relay control unit 30 for performing circuit switching of radio devices, etc., antennas 33 and 34, a radio device 36, an antenna switch 39, and a modem. 43. The number of antennas is not limited to two, and may be more than two. Further, the number of the wireless device 36 and the number of the modems 43 are not limited to two, and may be more than two.

It should be noted that the plurality of antennas in FIG. 4 can be made into one antenna by using an antenna duplexer.

The radio line designation control unit 28 constantly monitors the line, and assigns a vacant line, for example, when making or receiving a call. Further, the multiplexing processing unit 29 performs a multiplexing process according to the multiplexing method used. The relay control unit 30 exchanges a communication line used by the wireless device 36.

The radio 36 has a transmitter / receiver a and a transmitter / receiver b, and the modulator / demodulator 43 has a modulator / demodulator a and a modulator / demodulator b.

The wireless channel designation control unit 28 controls the transmitter / receiver a and the transmitter / receiver b, and
Performs multiplexing processing on the modulator / demodulator a and the modulator / demodulator b. Further, the modem may be adapted to support one or more types of multiplexing systems processed by the multiplexing processing unit.

The relay control unit 30 can connect a wireless line in one wireless device and / or connect a wireless line between different wireless devices. As a result, the relay control unit 30
It enables communication between mobile stations and / or base stations communicating with the antenna 33, communication between mobile stations and / or base stations communicating with the antenna 34, and communication between the antennas 33 and 34. In addition, communication with a fixed station in a fixed telephone network can be performed via the relay control unit 30.

The switch SW39 is controlled by the control of the radio channel designation control unit 28, and the antenna to be used is selected. However, without providing the switch 39, it may be connected to a transmitter / receiver as it is, or outputs of a plurality of antennas may be combined. Alternatively, these may be combined.

As described above, the radio channel designation control unit 28 controls the transmitter / receiver a and the transmitter / receiver b, and the multiplex processing unit 29 controls the modulator / demodulator a and the modulator / demodulator b), and the relay control unit 30 uses the wireless device more efficiently by connecting the wireless line in one wireless device and / or connecting the wireless line between different wireless devices. be able to.

An embodiment of the present invention when the multiplexing process is performed by FDMA will be described with reference to FIG.

The system shown in FIG. 5 uses the base stations 15 ₁ , 1
5 _2, the terminal station _161-164 and the radio relay apparatus 100F
It is composed of

The radio relay apparatus 100F includes an antenna 35
a, b, c, d, e, f, radios 36a, b, c, d, e, f, modems 43a, b, c, d, e, f, radio line designation control unit 2
8, a relay control unit 30, and a multiplex processing unit (FDMA) 29F.

Although this example shows a case where there are six radios, the configuration of the present invention can be extended and applied to a case where two or more radios are incorporated. Antennas 35a, b, c,
d, e, and f are base stations 15 ₁ and 15 ₂ and terminal stations 16 ₁ to 16 ₁
6 Both of the radio waves of ₄ can also be transmitted and received. Note that a plurality of antennas in FIG. 5 can be made into one antenna using an antenna sharing device, or an arbitrary radio can be switched to an arbitrary antenna at any time using an antenna switch. .

A multiplexing processing unit (FDMA) 29F, a radio line designation control unit 28, and a relay control unit 30
Any wireless line that can be transmitted and received by a, b, c, d, e, and f can be connected to either the base station side or the terminal station side. further,
Relaying in the same station side wireless section is also possible.

In FIG. 5, an FDM composed of six frequencies
An example is shown in which the base station side, the terminal station side, and the terminal side return relay of the A system are performed by six wireless devices.

[0063] The base station 15 ₁ uses the channel, the base station 15 ₂ uses channel. The terminal station 16 ₁ uses the channel, the terminal station 16 ₂ uses a channel, the terminal station 16 _3, using the channel, the terminal station 16 ₄ is using the channel.

The radio device a uses a channel,
Radio b uses a channel, radio c uses a channel, radio d uses a channel, radio e uses a channel, and radio f uses a channel. I have.

The relay control unit 30 connects the channels, the channels, the channels, and the channels.

As a result, the radios 36a, b, c, d, e,
The frequency possessed by f is freely shared between the wireless devices, and the relay communication is performed by using the frequency usable by each wireless device without waste.

An embodiment of the present invention when the multiplexing process is performed by TDMA will be described with reference to FIG.

The system shown in FIG. 6 includes a base station 15 and a terminal station 1
And a 6 _{1-16 4} and the wireless relay apparatus 100T.

The radio relay apparatus 100T includes a radio channel designation control unit 28, a multiplex processing unit (TDMA) 29T, a relay control unit 30, antennas 33 and 34, radios 36a and 36b, an antenna switch 39 and a modem 43a. b. Although this example shows a case where there are two radios, the configuration of the present invention can be extended and applied to a case where two or more radios are built in.

[0070] Antenna 33 and 34 are both of the radio base station 15 and the terminal stations _161-164 may also be transmitted and received Incidentally, a plurality of antennas in FIG. 6, a single antenna using a duplexer It is also possible to use an arbitrary wireless device while switching to an arbitrary antenna at any time by using an antenna switch. The wireless line designation control unit 28, the multiplex processing unit (TDMA) 29T, and the relay control unit 30 can connect any wireless line that can be transmitted and received by the wireless devices 36a and 36b to either the base station side or the terminal station side. . Furthermore, relaying in the same station side wireless section is also possible.

The base station 15 has 32k channels and 64k channels.
You are using a channel. The terminal station 16 _1,
Using the channel 32k, the terminal station 16 ₂ uses a 64k channel, the terminal station 16 _3, using the channel 32k, the terminal station 16 ₄ uses a channel 32k.

In the multiplexing processing unit 29T, two time slots are allocated to the 64k channel and the channel is doubled in speed. In the relay control unit 30,
And are connected.

FIG. 6 shows an example in which the base station side, the terminal station side, and the terminal side return relay of the PHS system composed of four time slots are performed by two radios. (TDMA) 29T and the radio line designation control unit 28 use 32k or voice communication for one line as a slot, and 64k communication for two lines.
With the terminal station side 32k or as a return communication of voice (extension), a plurality of wireless lines are set by freely sharing the time slot of the wireless device 36 (No1, No2) between the wireless devices,
Relay communication is performed using the line capacity of each wireless device without waste.

An embodiment of the present invention when the multiplexing process is performed by CDMA will be described with reference to FIG.

The system shown in FIG. 7 includes a base station 15 and a terminal station 1
And a 6 _{1-16 4} and the wireless relay apparatus 100C.

The radio relay apparatus 100C includes a radio channel designation control unit 28, a multiplex processing unit (CDMA) 29C, a relay control unit 30, antennas 33 and 34, radios 36a and 36b, an antenna switch 39 and a modem 43a, b.

This example shows a case where there are two radios and each radio operates at a different center frequency (fa, fb). However, the configuration of the present invention is applicable to a case where two or more radios are built in. Can also be extended and applied. Antenna 33 and 34 both radio base station 15 and the terminal stations _161-164 may also be transmitted and received.

It is to be noted that a plurality of antennas in FIG. 7 can be made into one antenna using an antenna duplexer, or an arbitrary radio can be switched to an arbitrary antenna at any time using an antenna switch. It is possible.

The base station 15 has 32k channels and 64k channels.
You are using a channel. The terminal station 16 _1,
Using the channel 32k, the terminal station 16 ₂ uses a 64k channel, the terminal station 16 _3, using the channel 32k, the terminal station 16 ₄ uses a channel 32k.

The code # 1 corresponds to a 32k channel, the code # 2 corresponds to a 64k channel, the code # 3 corresponds to a 32k channel, and the code # 4 is 64k. And the sign of # 5 is
This corresponds to a 32k channel, and the sign of # 6 corresponds to a 32k channel.

As described above, the radio channel designation control unit 28, the multiplex processing unit (CDMA) 29C, and the relay control unit 30
Any wireless line that can be transmitted and received by the wireless devices 36a and 36b can be connected to either the base station side or the terminal station side. further,
Relaying in the same station side wireless section is also possible.

As a result, the wireless line is freely shared between the wireless devices, the plurality of wireless lines are set, and relay communication is performed using the line capacity of each wireless device without waste.

[0083]

As described above, according to the wireless relay apparatus of the present invention, the usage of two or more wireless devices is not limited to the relay source side, the relayed side, and the like. Can be freely shared between wireless devices and a plurality of wireless lines can be set, thereby reducing the division loss of the number of wireless lines that can be set, which was caused by fixing the communication partner station for each wireless device, and having the wireless device. It is possible to effectively use the number of wireless lines that can be set.

Further, since the maximum number of wireless lines that can be used in the extension communication or the like that is looped back by the relay device itself increases, the degree of freedom in setting the lines increases, so that the efficiency of using the wireless lines can be improved.

Also, by dynamically designating a radio channel, the radio channel resources of one radio can be freely shared between the radios, and relaying more than the capacity of one radio occurs. However, by freely allocating and using the radio lines of multiple prepared radios, it is possible to suppress call loss due to shortage of radio resources and to make effective use of the capabilities of the radios and to connect simultaneously. Number can be increased.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a conceptual diagram of an FDMA wireless system in an FDMA multiple access system.

FIG. 2 is a diagram for explaining a conceptual diagram of a TDMA (4 time slots) wireless system in a TDMA multiple access system.

FIG. 3 is a diagram for explaining a conceptual diagram of a CDMA wireless system in a CDMA multiple access system;

FIG. 4 is a diagram for explaining an outline of a system configuration example of the present invention.

FIG. 5 is a diagram for explaining an embodiment of the present invention when multiplexing processing is performed by FDMA.

FIG. 6 is a diagram for describing an embodiment of the present invention when multiplexing processing is performed by TDMA.

FIG. 7 is a diagram for describing an embodiment of the present invention when multiplexing processing is performed by CDMA.

FIG. 8 is a diagram illustrating a configuration example of a conventional wireless relay device (in the case of two wireless devices).

FIG. 9 is a diagram for specifically explaining FIG. 8 in a PHS system.

[Explanation of symbols]

 1, 2 call processing control unit 3, 4, TRX 5, 27, 30 relay control unit 6, 15, CS (public base station) 7, 13, 14, 16 mobile station or base station 9 2TRX wireless relay device 10, 100 wireless relay Apparatus 11, 12 Radio link 20, 21, 22, 36 Radio 23, 24, 28 Radio link designation control unit 25, 26, 29 Multiplex processing unit 31, 32, 33, 34, 35 Antenna 37, 38, 39 Antenna Changeover switch (SW) 41, 42, 43 Modulator / demodulator 50 Encoding unit 51 Time division multiplexing unit

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Takayuki Ishiguro F-term (reference) 5K022 AA09 AA17 AA27 EE01 EE14 EE24 5K028 AA11 in NTT Docomo, 2-1-1 Nagatacho, Chiyoda-ku, Tokyo BB06 CC02 DD04 HH02 HH03 KK12 LL11 RR02 5K067 AA41 CC02 CC04 CC10 EE02 EE06 EE10 KK01 5K072 AA11 AA18 BB25 BB27 CC13 CC15 CC20 CC31 DD11 DD16 EE01 GG01 GG12 GG13 GG26 GG33 GG36

Claims (6)

[Claims] 1. A wireless relay apparatus having a plurality of wireless devices in a wireless communication system, wherein the wireless relay device switches and controls a wireless line used by the wireless device, and a line switching control means commonly provided for different wireless devices. Line relay means for connecting and relaying the wireless line so that predetermined communication is performed. 2. The wireless relay device according to claim 1, wherein the line switching control unit switches and controls the wireless lines of all of the plurality of wireless devices. 3. The wireless relay device according to claim 1, wherein each of the wireless devices has a plurality of wireless lines, and the line relay unit connects and / or differs from each other in a wireless device. A wireless relay device for connecting a wireless line between wireless devices. 4. The wireless relay device according to claim 1, further comprising a modem and a multiplex processing unit, wherein the modem includes one or more processed by the multiplex processing unit. A wireless relay device which is compatible with various types of multiplexing systems. 5. The wireless relay device according to claim 4, wherein the multiplex processing unit performs one or more types of multiplex processing. 6. The wireless relay device according to claim 1, further comprising an antenna switch, wherein the line switching control unit connects the wireless device and the antenna in accordance with the assigned wireless line. A wireless relay device that controls the antenna changeover switch so as to be connected.