NASA Technical Reports Server (NTRS) 20150014498: External Wireless Communication System Status for POIWG

Status: "Define input and output
data rates for the External Wireless
Network and define the

Project Title: EWC Date: 7/15

Presenter:

Chatwin Lansdowne

management of those data rates/'

• Work in Progress

• EWC Network Load Projection

• Multi-user performance interaction test completed recently, analysis in progress for
traffic model

• Hidden Node issue is being addressed by protocol requirements changes; one existing
user may now require a lightly loaded network

• Preliminary EWC Network load projection is being developed

• EWC System expansion planning

• US Lab Nadir coverage antennas (Orb4 launch)

• 802.11ac COTS WAPs/clients (approved; selection in progress, inventory in 1Q16)

• Early expansion candidates: 802. lln coverage from Node 3 location, or EHDC camera
locations (unapproved)

• Long-term expansion "100% coverage" (unapproved)

• Future Work-flow

• EWC commitments to payloads will be managed through the EWC SPRT, which includes
representation from ISS program, Operations, and Engineering

• EWC network traffic management within capacity will require real-time coordination of
payload schedules

Avionic Systems Division