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We consider a wireless network of nodes based on IEEE 802.11 MAC that can support multiple transmission rates and supports relay based transmissions.
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The results are shown in Figure6, where we see the number of supported relay users of relay set 1 versus the number of macro users.
This is well demonstrated in the simplest cooperative network -- 2-way relay channel (2-WRC) comprising two terminals A and B bidirectionally communicating between themselves via a supporting relay R. Traditional protocols avoiding interference require 4 stages for every packet exchange (Figure 1a).
eNBs that do not support relaying will not recognize this message and will thus ignore it.
Once the RN has identified the eNBs that support relaying, it can select its donor eNB based on several criteria.
The eNBs that support relaying can inform RNs about their relaying capability by including this information in the message blocks they broadcast regularly to the whole cell.
As an alternative, the RNs can query the eNBs to see if they support relaying using a new Radio Resource Control (RRC) protocol procedure.
The two main systems supporting relaying are the Long-Term Evolution-Advanced (LTE-Advanced) [10] from the 3rd Generation Partnership Project (3GPP) forum and the mobile Worldwide Interoperability for Microwave Access (WiMAX) standard IEEE 802.16 m [11, 12].
"There's a Chinese saying: river water and well water don't mix," said Rose Pak, the general consultant to the Chinese Chamber of Commerce, which supports the relay.
Don't miss out how you can still join in Support the relay The Olympic Torch's 70-day journey will take it within 10 miles of 95 per cent of the UK's population, with celebrations in nearly every city.
Figure 2 shows the architecture of an LTE network extended to support static relay deployment.
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