The site was developed by three nonprofit environmental groups — the National Wildlife Federation, the Natural Resources Defense Council and the Ecology Center — to relay requests en masse to specific retailers.
The plan worked, and now the pilots relay requests for specific items like insulin to Ken George, who, as a field missionary in the Dominican Republic with G.O. Ministries, is coordinating the ground operation.
The average delay of a data packet in the sensor node, denoted by D. Since the sensor's data generating rate is λ and since the rate of the sensor's relay requests from other sensors is λ E, by using Little's law [14], we have D = 1 λ + λ E ∑ i = 1 ∞ i × P R i + P N i = K β r 1 + r 2 λ + λ E 1 − r 2 2. (12).
Specifically, whenever both the uncommitted channel resource and energy resource of the RS are sufficient to fulfill the MS's relay service request, this request is admitted.
North's one-heart response to one diamond showed spades, and his next two bids were relays, requesting more information about the South hand.
It further assumes that the channel is ideal (i.e., there are no hidden nodes and capture effect), and calculates the saturated throughput for Relay-Request-To-Send (RRTS /Relay-Clear-To-Send (RCTS) access.
The content cached in relays may dynamically change due to arrival or completion of relaying requests.
In each group, a group head is selected which communicates with an eNB by relaying requests of the group members to an eNB (i.e., peer-to-peer communication).
The latter includes the uncertainty of the number of sensors in the area to be covered, the uncertainty of relaying requests from neighboring sensors, the uncertainty of routing to the head or the gateway, the uncertainty of their topologies, and many other related uncertainties.
