By Ashwin Gumaste
First Mile entry Networks and allowing applied sciences presents a platform for showcasing first mile entry applied sciences and linked community strategies. utilizing this e-book, you know about the bandwidth bottleneck in the first mile and discover the ensuing enterprise customers. reap the benefits of a radical and considerate dialogue of the enterprise case for the 1st mile, which is helping you technique the difficulty from a number of views. study a number of entry applied sciences, comprehend the variety of suggestions inside of this quarter, and take your strategies extra utilizing sound and exact administration concepts. make the most of the cast and established implementation technique supplied by means of this publication to take away networking anomalies, resembling the electronic divide. This booklet is helping you recognize and capitalize out there chance awarded by way of the 1st mile.
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Additional info for First mile access networks and enabling technologies
6: What are the two primary reasons for the massive growth of first mile networks? 7: Define broadband and explain how broadband can solve the digital divide. 8: Compare GPON, EPON, and BPON from technological and standardization perspectives. What are the key reasons for each development? 9: How do multiple technologies work over a PSTN? 10: From Table 1-1, differentiate each technology solution in terms of services. For example, for pure voice lines a PSTN is sufficient, but for videoconferencing we need higher speeds (and hence ADSL is required).
Simultaneously, the OLT in the downstream transmission sends data to the ONU. At the end of transmission to a particular ONU, the OLT so plans the upstream transmission that this incumbent receiving ONU informs the OLT of the size of data it has in its buffer. This way the OLT knows how much data is there in each buffer of every ONU. 49 50 This protocol is superbly designed for centralized management. However, the protocol lacks in being able to cater to the dynamic variation of IP traffic. Note that IPACT also cannot serve QoS-sensitive traffic very well, which in contrast is taken care of by TUR.
TUR is a simple protocol that guarantees each end-user node some time to transmit data; the amount of time it gets is proportional to the amount of traffic it gets (from the central office [CO]), with some variations for ensuring fairness. The idea is as follows: An end user, upon receiving a frame at time t1 of size S1, gets the transmitting time from time t1 + S1 to time t1 + S1 + S1 d, where d is some constant of the system. The constant d neutralizes the differences in propagation delays among different nodes in the system (analogous to the far-near problem).