In Section 2, we have seen that there is a fundamental difference between the channel for DSS repair transmission and the classical MIMO-MAC, in the sense that the former includes additional inter-helper communication links.
We then present two more elaborate schemes extending the first one, achieving a higher DMT by taking advantage of the inter-helper communication links and transforming the overall DSS network into a series of relay networks, where conventional half-duplex4 cooperative-communication protocols such as the non-orthogonal amplify-and-forward (NAF) strategy [37, 38] will be used.
Then, the transmission from the K helpers to the repairing node can be regarded as wireless multiple-input multiple-output (MIMO) multiple-access communication [18 20] with an additional feature of inter-helper communication among the K helpers.
There the Nissan officials, assisted by English-speaking Japanese workers called "communication helpers," imparted the intricacies of the company's production techniques to the Americans.
These numerical results were obtained when there were 40 helper nodes in the communication area.
Fig. 9 Throughput performance as a function of N s Fig. 10 Delay performance as a function of N s Fig. 11 Throughput performance as a function of N h Fig. 12 Delay performance as a function of N h. Figure 10 shows a comparison of delay performances by analysis and simulation when there are forty helper nodes in the communication area.
The object of our article is to achieve the maximum energy efficiency of TCP traffic by finding the appropriate helpers to provide cooperative communication across the time slots and controlling the lower layer parameters in each slot.
In our recent study, we introduced the PlayNCool protocol that increases the throughput of the wireless networks by enabling a helper node to strengthen the communication link between two neighboring nodes and using random linear network coding.
In Section 2, we will present the channel model for DSS repair transmission, which can be seen as a MIMO-MAC in the presence of communication links among helper nodes.
To see this, note that the MIMO multiple-access channel (MAC) studied in classical information theory [21] assumes only the existence of communication links from the helpers to the repairing node, or equivalently from sources to destination.
The communication skills content in Helpers was expanded with additional content appropriate for a health professional audience that addressed motivational approaches to patient behavior change.
