(19)
(11)EP 2 890 018 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
26.06.2019 Bulletin 2019/26

(21)Application number: 15150308.3

(22)Date of filing:  07.02.2005
(51)International Patent Classification (IPC): 
H04B 1/38(2015.01)
H04B 1/036(2006.01)
H04B 1/74(2006.01)

(54)

Digital wireless apparatus

Digitale drahtlose Vorrichtung

Appareil sans fil numérique


(84)Designated Contracting States:
DE FR GB IT

(30)Priority: 13.02.2004 JP 2004037539

(43)Date of publication of application:
01.07.2015 Bulletin 2015/27

(60)Divisional application:
19173007.6

(62)Application number of the earlier application in accordance with Art. 76 EPC:
05709844.4 / 1715593

(73)Proprietor: NEC Corporation
Tokyo 108-8001 (JP)

(72)Inventor:
  • Michida, Masaaki
    Tokyo 108-8001 (JP)

(74)Representative: Stork Bamberger Patentanwälte PartmbB 
Meiendorfer Strasse 89
22145 Hamburg
22145 Hamburg (DE)


(56)References cited: : 
EP-A1- 1 154 523
WO-A1-97/34432
US-A- 5 963 873
WO-A1-02/23930
WO-A1-02/065715
US-A1- 2003 157 307
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    TECHNICAL FIELD



    [0001] The present invention relates to a digital radio apparatus, and particularly to the digital radio apparatus that is installed inside a building and is used for point-to-point communication.

    BACKGROUND ART



    [0002] Conventionally, as shown in Fig. 1, ODU (outdoor radio apparatus) is disposed on an antenna and IDU (indoor radio apparatus) is installed in a building A, where IDU is connected to ODU through a cable. The radio communication is performed with a building B in which ODU and IDU are similarly installed.

    [0003] A configuration of IDU installed inside the building and the like will be described below. Fig. 2 is a front view schematically showing a configuration of a (1+1) switching type IDU provided with two modulation and demodulation units including a backup unit used at the time of apparatus failure or degradation of radio line quality. Examples of the (1+1) switching type include a set backup type in which for one radio frequency, two transmitting and receiving devices serving as active use and backup use are switched, and a radio frequency redundancy configuration type in which the radio frequency having better line quality is used from the two radio frequencies used. As shown in Fig. 2, the conventional IDU has a three-layer structure in which modulation and demodulation units 16 and 17 are vertically provided while sandwiching a shared unit 15 located at a central portion.

    [0004] The shared unit (SW unit) 15 includes connector units 25 and 26 and a duct unit 24. The connector units 25 and 26 are used when a user connects IDU to a device. The duct unit 24 performs the heat dissipation for the apparatus, and the duct unit 24 is provided so as to mainly release the heat in a power supply unit 23 of a bottom MDU unit from the side of the apparatus. In the connector units 25 and 26, the number of connectors can be changed according to the number of main signal channels. The number of connector units is not limited as long as at least one connector unit exists. The top and bottom modulation and demodulation units (MD unit) 16 and 17 include cable connection units 18 and 19, air intake units 20 and 21, and power supply units 22 and 23, respectively. The cable connection units 18 and 19 are used to connect ODU and IDU, and the air intake units 20 and 21 take in air.

    [0005] In the conventional art, for example, there is a radio communication apparatus mounting structure, in which influence generated by the heat dissipation from the lower side of the radio communication apparatus is avoided by arranging a main board on the upper side of a resin cover for connecting a metal case (for example, see Japanese Patent Application Laid-Open No. H11-74814, hereinafter referred to as Patent Document 1).

    [0006] WO 97/34432 A1 relates to a base station in a communication system.

    [0007] US 5,963,873 A relates to a digital multiplex radio system having a plurality of unit cases as well as several active lines an at least one spare line.

    [0008] WO 02/23930 A1 relates to a fixed broadband IP access system that is arranged to communicate information, without relying on any physical connection, between subscriber and unit and base station.

    DISCLOSURE OF THE INVENTION


    PROBLEMS TO BE SOLVED BY THE INVENTION



    [0009] However, in the conventional IDU, because the power supply unit and the like create a large amount of heat in the modulation and demodulation unit, it is necessary to provide an air intake unit and a heat dissipation duct. Therefore, cost is increased, and it takes a long time to build IDU. Furthermore, there is a problem in usability of IDU, because cables must be routed right beside the shared unit 15. That is, in the front face of IDU shown in Fig. 2, the air intake ports are closed when cables are routed from connectors to the upper and lower portions of IDU because the air intake units 20 and 21 are provided above and below the connector units 25 and 26, and the modulation and demodulation units 16 and 17 cannot be exchanged due to the cables because the whole of the modulation and demodulation unit 16 or 17 must be exchanged.

    [0010] Because IDU is used inside a building, downsizing of the apparatus is required. However, when the air intake unit and the duct are provided for the purpose of the heat dissipation, the configuration of the whole apparatus is restricted. Therefore, the downsizing of the apparatus has been hardly realized.

    [0011] The technique disclosed in Patent Document 1 is aimed at the structure of a general large-size radio apparatus, and cannot be applied to the structure of the indoor radio apparatus used for the point-to-point communication.

    [0012] In view of the foregoing, an object of the invention is to provide a digital radio apparatus in which the heat dissipation can effectively be performed while the apparatus is downsized, by forming the modulation and demodulation unit having a half size compared with conventional apparatus so as to realize a double-layer structure in which the two modulation and demodulation units are arranged in parallel on the shared unit.

    MEANS TO SOLVE THE PROBLEM



    [0013] In order to achieve the above object a digital radio apparatus according to the present invention is characterized in that two modulation and demodulation units are provided in parallel on an upper portion of a shared unit having a baseband main signal interface circuit.

    [0014] Further, the digital radio apparatus of the invention is characterized in that said modulation and demodulation unit comprises a modulation and demodulation circuit, and the modulation and demodulation circuit is formed by a printed board in which inner via holes are used.

    [0015] Further, the digital radio apparatus of the invention is characterized in that said modulation and demodulation circuit is integrated.

    [0016] Further, the digital radio apparatus of the invention is characterized in that said shared unit comprises at least one detachable connector unit.

    [0017] Further, the digital radio apparatus of the invention is characterized in that said shared unit comprises an MUX circuit and the MUX circuit is integrated.

    [0018] Further, the digital radio apparatus of the invention is characterized in that said connector unit is commutable to a LAN connection unit.

    [0019] Further, the digital radio apparatus of the invention is characterized in that a 40-ch E1 (ITU-T G.703 2.048 Mbps) signal is dealt with in said connector unit.

    [0020] Further, the digital radio apparatus of the invention is characterized in that said shared unit comprises control means for not only setting a device in said digital radio apparatus but conducting communication of monitoring and control information on an outdoor radio apparatus and the control means also controls and monitors an interface unit of the outdoor radio apparatus.

    [0021] Further, the digital radio apparatus of the invention is characterized in that said interface circuit is formed by a printed board in which inner via hole are used.

    [0022] Further, the digital radio apparatus of the invention is characterized in that said digital radio apparatus is an indoor digital radio apparatus (IDU).

    EFFECT OF THE INVENTION



    [0023] According to the invention, the heat dissipation can effectively be performed without providing the heat dissipation duct in the shared unit, and the downsizing of the apparatus can be realized.

    BEST MODE FOR CARRYING OUT THE INVENTION



    [0024] The best mode for carrying out the invention will be described below with reference to the accompanying drawings.

    EMBODIMENT



    [0025] Fig. 3 is a perspective view showing a front face of a digital radio apparatus according to an embodiment of the invention. The digital radio apparatus shown in Fig. 3 is a (1+1) switching type indoor radio apparatus (IDU) used for the point-to-point communication. The (1+1) switching type IDU is provided with two modulation and demodulation units including a backup modulation and demodulation unit.

    [0026] As shown in Fig. 3, IDU of the embodiment has a double-layer structure in which modulation and demodulation units 2 and 3 are arranged in parallel on a shared unit 1 so as to be at an equal distance from the shared unit 1. Each of the modulation and demodulation units 2 and 3 has half a width of the conventional unit. The modulation and demodulation units 2 and 3 have a thickness thinner than that of the conventional three-layer structure IDU shown in Fig. 2 by one unit of the conventional three-layer structure IDU.

    [0027] The shared unit 1 includes a connector unit 8 and a connector unit 9. The connector unit 8 includes two baseband bipolar signal slot portions for a digital leased line in the front face. Fig. 3 shows a connector configuration through which 40-ch E1 (ITU-T G.703 2.048 Mbps) signals are interfaced. A user connects the cable from the connector units 8 and 9 to an arbitrary communication device. The connector units 8 and 9 are detachable, and can be changed to a LAN connection unit. Although the E1 signal is used in the embodiment, a T1 signal (ANSI standard) may be used. The invention is not limited to the E1 signal or the T1 signal. Although the number of signals is set at 40-ch in the embodiment, the number of signals is not limited to this.

    [0028] The modulation and demodulation units 2 and 3 include cable connection units 4 and 5 and power supply units 6 and 7, respectively. The cable connected to the outdoor radio apparatus (ODU) is connected to each of the cable connection units 4 and 5. The heat generated in the power supply unit is dissipated in an upward convection from an air ventilation hole made on an upper-surface chassis of the modulation and demodulation unit. An air inlet hole (not shown) is made on a side-face chassis of the modulation and demodulation unit. As a result, the heat generated in the apparatus is naturally dissipated from the upper portion of the power supply unit. Therefore, in IDU of the invention, it is not necessary to provide the heat dissipation duct inside or outside the apparatus.

    [0029] In IDU of the embodiment, the cable connection unit of the modulation and demodulation unit and the power supply unit are configured to be detachable. Consequently, IDU of the embodiment can be changed to a (1+0) type IDU having a 1U structure in which a backup modulation and demodulation unit is not included (see Figs. 4 and 5). For example, as shown in Figs. 6A and 6B, in the conventional IDU, the shared unit is formed in an upright shape. Therefore, the conventional IDU cannot be changed to the (1+0) type IDU.

    [0030] In (1+1) IDU of the embodiment, for example, as shown in Fig. 7, the modulation and demodulation units 2 and 3 and the connector units 8 and 9 are configured to be detachable. ODU-INTFC circuits 43 and 44, DC-DC-CONVs 41 and 42, MODEMs 29 and 34, cable connection units 4 and 5, and power supply units 6 and 7 are also detachable in the modulation and demodulation units 2 and 3. Therefore, in (1+1) IDU of the embodiment, each detachable unit of the modulation and demodulation unit 3 of Fig.7 can be detached to change (1+1) IDU to (1+0) IDU as shown in Fig. 5. In changing the configuration, the connector unit 9 may be changed to the LAN connection unit (LAN port unit) (see Fig. 4). In this way, compatibility between the (1+1) type IDU and the (1+0) type IDU can be realized and structural convenience is achieved.

    [0031] Fig. 8 is a block diagram showing an internal configuration of the (1+1) type indoor radio apparatus (IDU) of the embodiment. Arrows in Fig. 8 indicate signal flows.

    [0032] As shown in Fig. 8, the shared unit 1 (SW unit) has a connector and LIU (Line Interface Unit). The baseband bipolar signal for the digital leased line is inputted to and outputted from the connector and LIU. The SW unit 1 includes an INTFC circuit, an MUX circuit, a CONTROL circuit, and an ALM/SC circuit. The INTFC circuit is an exchangeable module. The MUX circuit multiplexes and separates N inputted channels (N: 40ch in the embodiment). The CONTROL circuit controls and monitors the radio apparatus. The ALM/SC circuit interfaces a warning state of the radio apparatus and an auxiliary signal that is transmitted and is added to a main signal.

    [0033] The modulation and demodulation unit (MD unit) 2 includes a modulation and demodulation circuit (MODEM) 29, an ODU-INTFC circuit 43, and DC-DC-CONV 41. MODEM 29 performs error correction, and modulation and demodulation. ODU-INTFC circuit 43 overlaps three kinds of signal, namely ODU electric power, a control signal and a modulation and demodulation signal, and acts as an interface. DC-DC-CONV 41 makes intra-secondary power source from a primary power source supplied from an installation place. The modulation and demodulation unit 3 has the similar configuration. IDU having the above configuration is connected to ODU installed outside the building.

    [0034] An INTFC (Interface) circuit 27 has the connector and LIU (Line Interface Unit). The connector and LIU (Line Interface Unit) transmit the E1 bipolar signal regulated by ITU-T (ITU-T G.703 standard) or the like, or the connector and LIU (Line Interface Unit) input and output the T1 signal of ANSI standard. The connector and LIU (Line Interface Unit) are formed as an exchangeable unit. Therefore, the interface of a LAN (100 BASE-TX/10 BASE-T) signal is also performed by exchanging the connector and LIU (Line Interface Unit) to a module having a LAN signal connector and a LAN interface circuit.

    [0035] An MUX (Multiplex) circuit 40 includes a main-signal transmission circuit, an auxiliary-signal transmission circuit, a transmission signal branch circuit, and a reception signal switching circuit. The main-signal transmission circuit performs stuff multiplexing (transmission side) and separation (reception side) of each channel baseband signal that is converted into an NRZ signal by the INTFC circuit. The main-signal transmission circuit also performs multiplexing (transmission side) and separation (reception side) of the LAN (100 BASE-TX/10 BASE-T) signal, and transmits the LAN signal. The auxiliary-signal transmission circuit overlaps various control information signals such as circuit information and radio apparatus control information in a radio signal transmission interval. The transmission signal branch circuit branches the signal transmitted to the two modulation and demodulation units in the (1+1) configuration. The reception signal switching circuit switches and selects the demodulated signals received from the modulation and demodulation units in the (1+1) configuration. The main-signal transmission circuit, the auxiliary-signal transmission circuit, the transmission signal branch circuit, and the reception signal switching circuit are integrated in the embodiment.

    [0036] CONTROL 28 is an IDU control means. CONTROL 28 performs device setting in IDU, namely performs necessary setting for IDU, conducts communication of monitoring and control information on ODU, and controls and monitors ODU-INTFC. For example, CONTROL 28 performs the control to increase a transmission output level of the other station when an electric field level of an RF (radio frequency) reception signal is decreased lower than a predetermined value, and CONTROL 28 performs the control to decrease the transmission output level of the other station when the reception level is higher than the predetermined value and the line quality is stabilized. Conventionally, in order to perform the communication of the ODU monitoring and control information, and the control and monitoring of ODU-INTFC, the control circuit is provided in each modulation and demodulation unit (MD unit). The control circuit including CPU controls the transmission device and the reception device. In the conventional method, for example, communication is required in order to synchronize control circuits in modulation and demodulation units, and a communication circuit for the synchronization is also needed in each modulation and demodulation unit. On the contrary, the modulation and demodulation units 2 and 3 do not have the control circuit that is conventionally used. Accordingly, because the communication circuit is not needed, the modulation and demodulation units 2 and 3 are simplified. For example, the modulation and demodulation units 2 and 3 are formed by a firmware storage memory and a control CPU.

    [0037] MODEMs 29 and 34 are a modulation and demodulation circuit, and include DPU/FECs 30 and 35, respectively. DPU/FECs 30 and 35 have a DPU (Digital Processing Unit) function and an FEC (Forward Error Collection) Encode/Decode function. The DPU function includes a multiplexing and separation process of a control signal against a main signal, a string conversion process, and a signal speed conversion process. DPU/FECs 30 and 35 are integrated in the embodiment. MODEMs 29 and 34 include MOD (Modulation) circuits 31 and 36 and DEM (Demodulation) circuits 32 and 37, respectively. The MOD circuits 31 and 36 are a digital signal modulation circuit in which the signal is modulated by QPSK, QAM, or the like. The DEM circuits 32 and 37 are a demodulation circuit in which the signal is modulated by QPSK, QAM, or the like. DEM/EQL is also integrated.

    [0038] The ODU-INTFC circuits 43 and 44 overlap three kinds of signal, namely ODU electric power, a control signal and a modulation and demodulation signal, on one cable to act as an interface. The DC-DC-CONVs 41 and 42 make the intra-secondary power source from the primary power source supplied from the installation place, and supply the electric power to each unit in the apparatus and ODU.

    [0039] Thus, each circuit is integrated in IDU of the embodiment, so that IDU can deal with the 40-channel signal which is larger than the conventional number of channels.

    [0040] The boards for the circuits included in MODEMs 29 and 34 are formed by multilayer printed boards in which an inner via hole is used (hereinafter referred to as multilayer printed board). The inner via hole is a hole which does not pierce through all the layers of the multilayer printed board but is made only between an Nth layer and an (N+1)th layer in order to extract signals. When the inner via hole is used, dead space is decreased, which allows miniaturization of a printed board, high-density wiring, and wiring shortening. For example, the inner via hole is effective in using LSI having a BGA (Ball Grid Array) pin arrangement. That is, the backside of the printed board in which the inner via hole is used has no through hole which is made in using a through via hole. Therefore, in the use of the inner via hole, components such as a by-pass capacitor can be arranged on the backside of LSI, so that high-density packaging can be realized. Inter-IC-pin signal number restriction can maximally be utilized because interference is decreased between the through via holes, so that the number of layers of the printed board is consequently decreased.

    [0041] In the embodiment, electric components such as a capacitor, a resistor, a coil, and IC mounted on the board are connected by inner via holes, which allows the area of one multilayer printed board to be reduced by about 50% compared with the conventional through via hole. The inner via hole is mainly used in mobile communication terminals such as a mobile telephone. Although the multilayer printed board is used for the MODEM unit circuit in the embodiment, the multilayer printed board may be used for each circuit in the shared unit.

    [0042]  Thus, in IDU of the embodiment, each circuit is integrated in the modulation and demodulation unit, each circuit is formed by the multilayer printed board, and CPU is provided only in the shared unit. As a result, the modulation and demodulation unit has half the size of the modulation and demodulation unit of the conventional IDU. Not only the modulation and demodulation unit is miniaturized, but also the width and depth of the shared unit can be decreased by integrating a MUX circuit and the like of the shared unit. Therefore, the downsizing of the apparatus can be realized as a whole. For example, the conventional apparatus has the size of about 482(W)x133(H)x300(D). On the other hand, the size of IDU of the embodiment can be decreased up to about 439(W)x88(H)x230(D). The size of the IDU of the embodiment is shown by way of example only, and the invention is not limited to this size.

    [0043] According to the digital radio apparatus of the embodiment of the invention, the modulation and demodulation unit is formed in the half size of the conventional modulation and demodulation unit, the digital radio apparatus has the double-layer structure in which the modulation and demodulation units are arranged in parallel on the shared unit, and the double-layer structure of the digital radio apparatus is thinner than the conventional apparatus having the three-layer structure. Therefore, the downsizing can be realized in the digital radio apparatus.

    [0044] Additionally, according to the digital radio apparatus of the embodiment, because the two modulation and demodulation units are arranged at the top of the digital radio apparatus to be able to dissipate the heat in the apparatus upward, it is not necessary to provide the heat dissipation duct. Therefore, the time and cost necessary to produce a heat dissipation duct can be eliminated.

    [0045] Additionally, according to the digital radio apparatus of the embodiment, the connector unit of the shared unit is configured to be detachable, and the connector unit can be applied to the (1+0) type digital radio apparatus, so that the apparatus-configuration compatibility can be realized.

    [0046] Additionally, according to the digital radio apparatus of the embodiment, circuits in the shared unit and the modulation and demodulation unit can be integrated to deal with the 40-channel signals larger than the conventional 16-channel signals.

    [0047] Because the modulation and demodulation unit is arranged below the connector unit of the shared unit in the conventional IDU, in the case where impedance conversion or connector conversion is required, it is necessary to provide a cable to an arbitrary interface unit (converter). On the other hand, according to the digital radio apparatus of the embodiment, IDU has the configuration in which the shared unit is arranged at the bottom, so that the connector can be connected to the interface unit without a cable.

    [0048] In the structure of the conventional radio apparatus shown in Fig. 8, a cable that connected the shared unit and the outdoor unit only stretches sideward from the shared unit. However, according to the digital radio apparatus of the embodiment, a cable can be connected downward, and the usability is improved.

    [0049] Although the embodiment of the invention is described above, the invention is not limited to the embodiment. Various modifications could be made without departing from the scope of the invention.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0050] 

    Fig. 1 is a schematic view showing a communication configuration of digital radio apparatuses;

    Fig. 2 is a front view showing an appearance of a front face of a conventional digital radio apparatus;

    Fig. 3 is a perspective view showing an appearance of a front face of a digital radio apparatus according to an embodiment of the present invention;

    Fig. 4 is a perspective view showing an appearance of a front face of another digital radio apparatus according to another embodiment of the present invention;

    Fig. 5 is a perspective view showing an internal configuration of a (1+0) digital radio apparatus according to an embodiment of the present invention;

    Fig. 6 is a schematic diagram showing a configuration of the conventional digital radio apparatus;

    Fig. 7 is a perspective view showing an internal configuration of a (1+1) digital radio apparatus according to an embodiment of the present invention; and

    Fig. 8 is a block diagram showing a configuration of a digital radio apparatus according to an embodiment of the present invention.


    DESCRIPTION OF REFERENCE NUMERALS



    [0051] 
    1, 14, and 15
    shared unit
    2, 3, 16, and 17
    modulation and demodulation unit
    4, 5, 12, 18, and 19
    cable connection unit
    6, 7, 13, 22, and 23
    power supply unit
    8, 9, 10, 11, 25, and 26
    connector unit
    20 and 21
    air intake unit
    24
    duct unit
    27
    INTFC
    28
    CONTROL
    29 and 34
    MODEM
    30 and 35
    DPU/FEC
    31 and 36
    MOD
    32 and 37
    DEM
    33 and 38
    EQL
    40
    MUX circuit
    41 and 42
    DC-DC-CONV
    43 and 44
    ODU-INTFC
    45 and 47
    upper cover
    46
    main board



    Claims

    1. An indoor digital radio apparatus, IDU, for a digital radio apparatus which includes said IDU, an outdoor radio apparatus, ODU, that connects to said IDU through a cable, and an antenna, performs a point-to-point radio communication with an opposing said digital radio apparatus, and has a (1+1) switching configuration for a backup in case of failure of said digital radio apparatus or degradation of radio line quality comprising:

    an active modulation and demodulation unit (2) for modulating a first input signal and demodulating a first received signal from a first outdoor radio apparatus, first ODU;

    a backup modulation and demodulation unit (3) for modulating a second input signal and demodulating a second received signal from a second outdoor radio apparatus, second ODU;

    a shared unit (1) for controlling said IDU, and having a connector for input/output interface connecting to a communication apparatus, via a communication cable,

    characterized in that

    said active modulation and demodulation unit (2) is detachable and includes a first cable connection unit (4) which connects via a first single cable to said first ODU,

    said backup modulation and demodulation unit (3) is detachable and includes a second cable connection unit (5) which connects via a second single cable to said second ODU,

    said active modulation and demodulation unit (2), and said backup modulation and demodulation unit (3) and said shared unit (1) are accommodated in a single IDU case,

    said single IDU case has a double-layer structure, and has a first and a second layer for said accommodation in a front side, wherein said first layer is arranged at the top of said IDU and said second layer is arranged at the bottom of said IDU,

    said active modulation and demodulation unit (2) and said backup modulation and demodulation unit (3) are mounted detachably to said first layer from a front side and are adapted to dissipate the heat in said IDU upward, have half a width of the shared unit and are arranged horizontally in parallel in said first layer above said shared unit (1), and

    said shared unit (1) has a control circuit for said first ODU and said second ODU, and is mounted to said second layer in such a manner that said IDU is downsized.


     
    2. The indoor digital radio apparatus, IDU, according to claim 1, characterized in that the active modulation and demodulation unit and the backup modulation and demodulation unit (2, 3) comprise a modulation and demodulation circuit (31, 32), and are formed by a printed board in which inner via holes are used.
     
    3. The indoor digital radio apparatus, IDU, according to claim 2, characterized in that
    said modulation and demodulation circuit (31, 32) is integrated.
     
    4. The indoor digital radio apparatus, IDU, according to claim 1 or 3,
    characterized in that
    said shared unit (1) comprises an MUX circuit (40) and the MUX circuit (40) is integrated.
     
    5. The indoor digital radio apparatus, IDU, according to claim 1, characterized in that
    said connector unit (8, 9) is commutable to a LAN connection unit.
     
    6. The indoor digital radio apparatus, IDU, according to claim 1 or 5, characterized in that
    a 40-ch E1, ITU-T G. 703 2.048 Mbps, signal is dealt with in said connector (8, 9) unit.
     
    7. The indoor digital radio apparatus, IDU, according to claim 1, characterized in that
    said shared unit (1) comprises control means (28) for not only setting a device in said digital radio apparatus, IDU, but conducting communication of monitoring and control information on said first outdoor radio apparatus, ODU, and said second outdoor radio apparatus, ODU, the control means (28) also controlling and monitoring said first ODU interface and said second ODU interface.
     
    8. The indoor digital radio apparatus, IDU, according to claim 4, characterized in that
    said MUX circuit is formed by a printed board in which inner via holes are used.
     


    Ansprüche

    1. Digitale Innen-Funkvorrichtung, IDU, für eine digitale Funkvorrichtung, die die IDU, eine Außen-Funkvorrichtung, ODU, die durch ein Kabel mit der IDU verbunden ist, und eine Antenne umfasst, Punkt-zu-Punkt-Funkkommunikation mit einer gegenüberliegenden digitalen Funkvorrichtung durchführt und eine (1+1)-Schaltkonfiguration als Ersatz im Fall des Versagens der digitalen Funkvorrichtung oder einer Verschlechterung der Funkleitungsqualität aufweist, umfassend:

    eine aktive Modulations- und Demodulationseinheit (2) zum Modulieren eines ersten Eingangssignals und Demodulieren eines ersten empfangenen Signals von einer ersten Außen-Funkvorrichtung, erste ODU;

    eine Ersatz-Modulations- und Demodulationseinheit (3) zum Modulieren eines zweiten Eingangssignals und Demodulieren eines zweiten empfangenen Signals von einer zweiten Außen-Funkvorrichtung, zweite ODU;

    eine geteilte Einheit (1) zum Steuern der IDU mit einem Verbindungsteil zur Input-Output-Schnittstellenverbindung mit einer Kommunikationsvorrichtung über ein Kommunikationskabel,

    dadurch gekennzeichnet, dass

    die aktive Modulations- und Demodulationseinheit (2) herausnehmbar ist und eine erste Kabelverbindungseinheit (4) umfasst, die über ein erstes einzelnes Kabel mit der ersten ODU verbunden ist,

    die Ersatz-Modulations- und Demodulationseinheit (3) herausnehmbar ist und eine zweite Kabelverbindungseinheit (5) umfasst, die über ein zweites einzelnes Kabel mit der zweiten ODU verbunden ist;

    die aktive Modulations- und Demodulationseinheit (2) und die Ersatz-Modulations- und Demodulationseinheit (3) und die geteilte Einheit (1) in einem einzigen IDU-Gehäuse untergebracht sind,

    das einzige IDU-Gehäuse eine Doppelschichtstruktur aufweist und eine erste und eine zweite Schicht zur Aufnahme in einer Vorderseite aufweist, wobei die erste Schicht an der Oberseite der IDU angeordnet ist und die zweite Schicht an der Unterseite der IDU angeordnet ist,

    die aktive Modulations- und Demodulationseinheit (2) und die Ersatz-Modulations- und Demodulationseinheit (3) von einer Vorderseite herausnehmbar an der ersten Schicht angebracht sind und eingerichtet sind, um die Wärme in der IDU nach oben abzuleiten, die halbe Breite der geteilten Einheit aufweisen und horizontal parallel in der ersten Schicht über der geteilten Einheit (1) angeordnet sind; und

    die geteilte Einheit (1) eine Steuerschaltung für die erste ODU und die zweite ODU aufweist und auf eine solche Weise an der zweiten Schicht angebracht ist, dass die IDU verkleinert ist.


     
    2. Digitale Innen-Funkvorrichtung, IDU, nach Anspruch 1, dadurch gekennzeichnet, dass die aktive Modulations- und Demodulationseinheit und die Ersatz-Modulations- und Demodulationseinheit (2, 3) jeweils eine Modulations- und Demodulationsschaltung (31, 32) umfassen und durch eine Leiterplatte gebildet sind, in der innere Durchkontaktierungen verwendet werden.
     
    3. Digitale Innen-Funkvorrichtung, IDU, nach Anspruch 2, dadurch gekennzeichnet, dass die Modulations- und Demodulationsschaltung (31, 32) integriert ist.
     
    4. Digitale Innen-Funkvorrichtung, IDU, nach Anspruch 1 oder 3, dadurch gekennzeichnet, dass
    die geteilte Einheit (1) eine MUX-Schaltung (40) umfasst und die MUX-Schaltung (40) integriert ist.
     
    5. Digitale Innen-Funkvorrichtung, IDU, nach Anspruch 1, dadurch gekennzeichnet, dass
    die Verbindungseinheit (8, 9) zu einer LAN-Verbindungseinheit auswechselbar ist.
     
    6. Digitale Innen-Funkvorrichtung, IDU, nach Anspruch 1 oder 5, dadurch gekennzeichnet, dass
    ein 40-ch E1, ITU-T G.703 2.048 Mbps-Signal in der Verbindungseinheit (8, 9) gehandhabt wird.
     
    7. Digitale Innen-Funkvorrichtung, IDU, nach Anspruch 1, dadurch gekennzeichnet, dass
    die geteilte Einheit (1) Steuermittel (28) nicht nur zum Einstellen einer Einrichtung in der digitalen Funkvorrichtung, IDU, sondern auch zum Durchführen von Kommunikation des Überwachens und von Steuerinformationen über die erste Außen-Funkvorrichtung, ODU, und die zweite Außen-Funkvorrichtung, ODU, umfasst, wobei die Steuermittel (28) auch die erste ODU-Schnittstelle und die zweite ODU-Schnittstelle steuern und überwachen.
     
    8. Digitale Innen-Funkvorrichtung, IDU, nach Anspruch 4, dadurch gekennzeichnet, dass
    die MUX-Schaltung durch eine Leiterplatte gebildet ist, in der innere Durchkontaktierungen verwendet werden.
     


    Revendications

    1. Appareil de radiocommunication numérique d'intérieur, IDU, destiné à un appareil de radiocommunication numérique qui comporte ledit appareil IDU, un appareil de radiocommunication d'extérieur, ODU, qui se connecte audit appareil IDU par l'intermédiaire d'un câble, et une antenne, réalise une radiocommunication point à point avec un appareil de radiocommunication numérique opposé, et possède une configuration de commutation (1 + 1) à des fins de secours en cas de défaillance dudit appareil de radiocommunication numérique ou de dégradation de la qualité de ligne de radiocommunication, comprenant :

    une unité active de modulation et de démodulation (2) destinée à moduler un premier signal d'entrée et à démoduler un premier signal reçu en provenance d'un premier appareil de radiocommunication d'extérieur, premier appareil ODU ;

    une unité de secours de modulation et de démodulation (3) destinée à moduler un second signal d'entrée et à démoduler un second signal reçu en provenance d'un second appareil de radiocommunication d'extérieur, second appareil ODU ;

    une unité partagée (1) destinée à commander ledit appareil IDU, et comportant un connecteur d'interface d'entrée/sortie se connectant à un appareil de communication par l'intermédiaire d'un câble de communication,

    caractérisé en ce que :

    ladite unité active de modulation et de démodulation (2) est amovible et comporte une première unité de connexion par câble (4) qui se connecte par l'intermédiaire d'un premier câble unique audit premier appareil ODU,

    ladite unité de secours de modulation et de démodulation (3) est amovible et comporte une seconde unité de connexion par câble (5) qui se connecte par l'intermédiaire d'un second câble unique audit second appareil ODU,

    ladite unité active de modulation et de démodulation (2) et ladite unité de secours de modulation et de démodulation (3) ainsi que ladite unité partagée (1) sont logées dans un boîtier unique d'IDU,

    ledit boîtier unique d'IDU possède une structure à double couche, et comporte une première et une seconde couche aux fins dudit logement sur un côté avant, dans lequel ladite première couche est disposée au sommet dudit appareil IDU et ladite seconde couche est disposée au bas dudit appareil IDU,

    ladite unité active de modulation et de démodulation (2) et ladite unité de secours de modulation et de démodulation (3) sont montées amovibles sur ladite première couche à partir d'un côté avant et sont conçues pour dissiper la chaleur dans ledit appareil IDU vers le haut, représentent la moitié de la largeur de l'unité partagée et sont disposées horizontalement en parallèle dans ladite première couche au-dessus de ladite unité partagée (1), et

    ladite unité partagée (1) comporte un circuit de commande dudit premier appareil ODU et dudit second appareil ODU, et est montée sur ladite seconde couche de manière à réduire la taille dudit appareil IDU.


     
    2. Appareil de radiocommunication numérique d'intérieur, IDU, selon la revendication 1, caractérisé en ce que l'unité active de modulation et de démodulation et l'unité de secours de modulation et de démodulation (2, 3) comprennent un circuit de modulation et de démodulation (31, 32) et sont constituées d'une carte de circuit imprimé sur laquelle sont utilisés des trous traversant intérieurs.
     
    3. Appareil de radiocommunication numérique d'intérieur, IDU, selon la revendication 2, caractérisé en ce que :
    ledit circuit de modulation et de démodulation (31, 32) est intégré.
     
    4. Appareil de radiocommunication numérique d'intérieur, IDU, selon la revendication 1 ou 3, caractérisé en ce que :
    ladite unité partagée (1) comprend un circuit de multiplexage, MUX (40) et le circuit MUX (40) est intégré.
     
    5. Appareil de radiocommunication numérique d'intérieur, IDU, selon la revendication 1, caractérisé en ce que :
    ladite unité formant connecteur (8, 9) peut être remplacée par une unité de connexion de réseau local.
     
    6. Appareil de radiocommunication numérique d'intérieur, IDU, selon la revendication 1 ou 5, caractérisé en ce que :
    un signal de type E1, à 40 canaux, UIT-T G. 703, 2048 Mb/s, est pris en charge dans ladite unité formant connecteur (8, 9).
     
    7. Appareil de radiocommunication numérique d'intérieur, IDU, selon la revendication 1, caractérisé en ce que :
    ladite unité partagée (1) comprend un moyen de commande (28) destiné non seulement à régler un dispositif dans ledit appareil de radiocommunication numérique, IDU, mais aussi à réaliser la communication d'informations de surveillance et de commande sur ledit premier appareil de radiocommunication d'extérieur, ODU, et ledit second appareil de radiocommunication d'extérieur, ODU, le moyen de commande (28) commandant et surveillant également l'interface dudit premier appareil ODU et l'interface dudit second appareil ODU.
     
    8. Appareil de radiocommunication numérique d'intérieur, IDU, selon la revendication 4, caractérisé en ce que :
    ledit circuit MUX est constitué d'une carte de circuit imprimé sur laquelle sont utilisés des trous traversant intérieurs.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description