With the repeater furthermore spreads the pleasure

As for the D-STAR tranceiver even as a single unit was what can do the rather effective using found? Also everyone please does tries challenging by all means, the local bureau question \u3063 in the \u3087, to the network making between local bureau of the D-STAR in at this opportunity and.

The next of the network making between local bureau is the repeater.
It introduced even before, but presently in Kanto in 4 bureaus and Tokai 3 bureaus, the repeater bureau * assist bureau of the D-STAR of 5 bureaus is installed in Kansai. When this repeater bureau * assist bureau is utilized skillfully, the communication possible range of the D-STAR tranceiver spreads furthermore largely.
The repeater for digital speech communication and with the one for digital data communication, has divided into another system. In order real time characteristic with digital speech communication is seriously considered, for delay and the like of the signal not to happen, it is the result which is considered.
Presently, because, the for respective sound, the both repeater for the data is installed in 12 bureaus which are in the midst of using at each area, it is accessible whichever mode, but when the repeater keeps being installed in the every place by the start of public offering from March of 2005, whether also the case that comes out, "for sound" only one side "for the data" it is installed, the %#3057;%#308c;%#307e;%#305b;%#3093;.

Appointing the call sign of the repeater which is used, it accesses the repeater of the D-STAR. The repeater which it appoints digital speech communication and data communication with the bureau of the range which is accessible is possible.
Network between local bureau of the wireless radio single unit, furthermore is the case that it spreads with application of the repeater.

- Ties the repeater the assist bureau

Thing of the range which the repeater covers is called the " repeater sight ", but those where you connect between this repeater sight are assist bureau.
The amateur band of the 10GHz band is used by the assist bureau of the D-STAR, relays between repeater bureau with the transmission speed 10Mbps. The 10Mbps is the same transmission speed as the 10BASE-T of the ethernet.
The assist bureau communication which connects between the repeater sight connection being possible to 4 places, 4 it is tied at assist bureau (within) calls the part of the repeater sight the zone.
The figure the right is image of the zone which ties three repeater sights.
Because as for the D-STAR tranceiver it is possible, to appoint the call sign of the repeater which is utilized up to 4 if call sign of the repeater inside the zone is appointed, partner bureau of communication being in the cover range of whichever repeater sight inside the zone, it is possible to communicate.

- With Internet to repeater of other zone connection

Through the gateway, you connect the repeater of the D-STAR to Internet and the other zone and doing connection relay have become possible.


With this Internet connection, it is possible also to access the repeater outside the zone.
For example, connecting to Tokyo * Toshima Ku JARL Executive Office repeater, also it is possible to communicate with the bureau where it accesses the repeater of the Osaka * Suminoe Ku world trade center.
Management of the information which is necessary for the connection to the repeater of Internet connection and the other zone which mind the gateway does the management server of the JARL.
It is necessary to receive the loan of the IP address where you connect to the repeater of the other zone, in order to do communication and data communication, you register to the JARL, set to the wireless radio in the D-STAR tranceiver. By the fact that IP address of the register being completed is set to the D-STAR tranceiver, be able to recognize the management server the wireless radio of our bureau and partner bureau has been located to some zone, through the gateway to the repeater of the corresponding zone, it relays. For example, the Hokkaido amateur bureau through Okinawa amateur bureau and the D-STAR repeater, being also to be possible, to communicate, it does. The figure under is image of network of the D-STAR repeater.



Without using assist bureau relay at the time of the D-STAR repeater establishment with public offering, the gateway is connected there is a possibility the independent D-STAR repeater which being installed in Internet. In this case, the cover area of that repeater becomes the zone.
When also everyone challenges to the D-STAR, in order to utilize the repeater effectively, please register in the JARL, make sure to receive the loan of IP address.




Repeater bureau (assist bureau) hardware

- Constitution of repeater

Constitution of the repeater sight becomes as in the figure the right.
Digital data type communication and audio type communication operate with the respective another repeater, through interface, it is connection possible even in the former analog FM repeater. When you make modem the repeater sight, connect to the wire circuit it can access Internet. In addition when the server is connected, it reaches the point where with the D-STAR tranceiver it can designate access as the server.


- Detailed of repeater
sight




The figure above has shown constitution of the part of digital data type communication, digital audio type communication and assist bureau and connected example. The respective repeater sight is controlled by the controller. With the relay transmission which minds assist bureau, multiplexing the signal from the repeater for the data and the repeater for digital sound, you send to assist bureau and transmit.
The signal which conversely assist bureau relays receives, being divided with this controller, is sent to the data repeater and the audio repeater.
At the repeater bureau * assist bureau of the D-STAR, be able to increase the data repeater / the audio repeater to the total 4 units, in addition assist bureau is 3 connections possible.

< ATM (Asynchronous Transfer Mode) with? >

Protocol of the assist bureau communication which connects between the repeater sight sends multiplexing the data signal and the aural signal with ATM system. As for the ATM packet as in the figure under the header section 5 bytes, consists of the packet where the signal section 53 bytes of 48 bytes is short.
Because it can appoint priority in this header section, attaching priority to the aural signal which needs real time characteristic, you send, the arrival time you are designed in such a way that it can guarantee real time characteristic. ATM system, following to the list which sets beforehand with the ATM switch which is placed on every repeater sight, it has reached the point where you send to ahead sending the ATM packet.
|ATM Cell (53byte) |\u2192

Header
(5byte)

Payload
(48byte)

Header
(5byte)

Payload
(48byte)

Header
(5byte)

Payload
(48byte)