ARLA/CLUSTER: ALE HF Interoperable Standard for Emergency / Disaster Relief Communications Between Organisations, Agencies, NGOs, Government, and Ham Radio.

Quinta-Feira, 19 de Julho de 2007 - 14:09:35 WEST

Emergency/Disaster Relief
Interoperation Channels
ALE Automatic Link Establishment
International Amateur Radio Service 	
FREQUENCY
kHz	 SIDE 
BAND	  AREA 
	ALE  CHANNEL
# 	
1845.0	 USB	 GLOBAL
	03 	
3791.0	 USB	 GLOBAL
	09 	
5403.5	 USB	 REGIONAL	 13 	
7065.0	 USB	 REGIONAL	 15 	
7185.5	 USB	 GLOBAL 	19 	
10145.5	 USB	 GLOBAL 	23 	
14346.0	 USB	 GLOBAL 	28 	
18117.5	 USB	 GLOBAL 	31 	
21437.5	 USB	 GLOBAL 	35 	
24977.5	 USB	 GLOBAL	 37 	
28312.5	 USB	 GLOBAL	 39 	
The HFLINK Group Forum is available for Emergency / Disaster Relief Communications support information.

If you have questions, are setting up an ALE system for Emcomm or Disaster Relief, or just need some guidance about getting started with ALE on the air, please join the HFLINK Group Forum <http://tech.groups.yahoo.com/group/hflink>  and post a message or question. There are radio operators and ALE experts available to help you.

If you are interested in Interoperative HF communications between different agencies or services via ALE, please see the HFLINK website section:
 ALE HF Interoperation for Amateur / NGO / Gov / Emcomm <http://hflink.com/interoperation> 

The Automatic Link Establishment Emergency / Disaster Relief Communications Operating Guide is now in the process of being updated and revised.  An announcement will be posted on the HFLINK Group Forum when the ALE Emcomm Operating Guide has been completed. Please check back again later. Thank you.	
ALE HF as the Interoperable Standard for Emergency / Disaster Relief Communications Between Organisations, Agencies, NGOs, Government, and Ham Radio

HF Interoperative Communications
For emergencies and disaster relief, there is often a need for government and non-governmental organisations (NGO) and amateur radio emergency services to communicate with each other. The first step is to gain agreement between counterpart organisations to cooperatively implement interoperative communications. Some organisations have not been aware that such communication is possible. Until recently, direct infrastructureless interoperation has only been available on a very limited basis for local communications, between certain organisations. With the many organisations that increasingly have HF ALE capability in the field, an interoperation solution now exists for all of these services to communicate with each other on-demand via HF radio. Different parts of the HF spectrum are useful for various distances, including local, national, regional, and international. The capacity to utilise the HF spectrum for communication on-demand with a common calling and alerting system, instantly provides a unique infrastructure-less communication medium. Infrastructure such as internet base station networks can also be utilised as part of HF ALE interoperation. ALE provides unique capability to fluidly use the same system for both infrastructure and non-infrastructure  communications, to network independently, or in ad-hoc peer-to-peer networks. 

Amateur Radio ALE Interoperation
The amateur radio HF bands are common ubiquitous frequencies available internationally, and available for emergency / disaster relief communications. The International Amateur Radio Service has standardised global ALE channels for interoperative communications <http://hflink.com/emcomm/> , and these ALE channels form the basis of a globally accessable common medium for all organisations and agencies to communicate with each other.

ALE Channel Planning - Technical Foundation for Interoperation
Interoperative HF communication is realised through channel planning between cooperative counterpart organisations for HF cross-channel ALE compatibility. ALE makes on-demand HF calls between organisations easy to implement. It is not necessary for the organisation to obtain new licensed frequencies, since each organisation's presently assigned transmitting channels are utilised for the interoperation. In the organisation's communication plan, the new interoperable channel utilises a presently authorised transmitting channel, with an additional receive frequency of the counterpart organisation configured as a half-duplex or split frequency channel.

EXAMPLE: NGO1 TO NGO2 COMMUNICATIONS VIA HF-ALE 
Half-duplex interoperative channels may be employed for Gov-to-NGO communications, or NGO1-to-NGO2 communications:

NGO1 Transceiver (half-duplex channel)	 NGO2 Transceiver (half-duplex channel)	
TRANSMIT an ALE call on an authorised channel;
RECEIVE an ALE call in half-duplex on the companion NGO2 channel nearest the frequency of NGO2 channel.	 TRANSMIT an ALE call on an authorised channel;
RECEIVE an ALE call in half-duplex on the companion NGO1 channel nearest the frequency of NGO1 channel.	

EXAMPLE: AMATEUR TO NGO COMMUNICATIONS HF-ALE 
For communications between NGO and amateur radio emergency services the channel configuration is as follows:

Amateur Transceiver (half-duplex channel)	 NGO Transceiver (half-duplex channel)	
TRANSMIT an ALE call to NGO on a standard amateur ALE voice channel;
RECEIVE an ALE call in half-duplex on the companion NGO's ALE channel
closest in frequency to the amateur channel.	 TRANSMIT an ALE call on an authorised channel;
RECEIVE an ALE call in half-duplex on the companion amateur ALE channel.	

Plain Language Netcalls
Plain language ALE Netcalls help to provide easy interface by users of HF-ALE interoperative networks.
As an example, to call an amateur ALE station, an NGO radio operator could simply select the interoperative channel and make an ALE NETCALL such as "HAM". Other NETCALLS and channel configurations could be developed within various plans.

Field Deployment
Once an interoperative HF-ALE plan is implemented and programmed into the transceivers of counterpart organisations, communications are immediately available in the field on-demand without the need for prior notification between organisations during emergencies and disasters.

Channel Coordination Assistance
Channel planning and coordination assistance is available on HFLINK group forum <http://www.hflink.com/group> .

Sincerely,

Bonnie Crystal KQ6XA, Founder, HFLINK

Frequency Coordinator,International Amateur Radio Automatic Link Establishment

cc: HFLINK forum

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