Meritorious Applications (continued)

UW Applications Summary of High Performance Connectivity Requirements ¹

Application	SDVC GeDET	EVOLve	Meta-Amphion	Amphion	ADAPT
Bandwidth Requirement	1-10 Mbs	10 Mbs	100 Mbs	100 Mbs	10-30 Mbs
QoS Low-Latency	<100 ms	<100 ms	<30 ms	< 30 ms	< 30 ms
Multicast	No	Yes	Yes	Yes	Yes
QoS on Demand	No	No	No	Yes	Yes
QoS Scheduled	Yes	Yes	Yes	Yes	Yes

1. An example of how bandwidth and latency requirements were determined using the ADAPT model follows:

To determine TSIN Node server response time:

This response time depends on the number of registered customers (users) who want to access the available transmission capacity database. Two years ago, a committee formed by the North American Electric Reliability Council (NERC) determined that a TSIN node server should be capable of supporting its connections to outside users with an average aggregate data rate of at least:

A = N * R bits/sec,

where N = 5% of registered customers for Phase 1, and R = 8000 bits/sec per customer for Phase 1 of our model.

It was assumed that for Phase 2, which we hope to implement by Summer 1998, the communication response time would be enhanced further. The numbers implied that a 1000 byte "page" or file of power transmission capability information would take 1 second to download to a customer's system. Since most files are of 100's of kilobytes in size, the time elapsed would be in the minutes range. Hence it is obvious that the response time will have to be improved in order to facilitate faster and practical exchange of data. The potential number of registered customers has increased because of the popularity of the model. The response time for future TSIN implementation will be based on the following calculation:

A = N (=100) * R (=240,000) = 24 Mbits/sec

This will allow file transfers of Mbyte sizes in at most a few seconds and usually < 1 second. This will facilitate transfer of measured data from the power system control center for real time system identification.

TSIN node connection Bandwidth dedication is estimated as:
     Bandwidth "B" of the TSIN node connection(s):

B = 2 * A bits/sec

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