15.01.2013 Views

U. Glaeser

U. Glaeser

U. Glaeser

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

FIGURE 42.17 Bandwidth trends.<br />

FIGURE 42.18 System latency.<br />

• Frame/packetization Delay<br />

• Media processing delay/complexity of the system<br />

• Bridging delay, e.g., used for conferencing or multi SoC system<br />

These delays may occur at different times in the life of the data in the communication system. A simplified<br />

communication system is shown in Fig. 42.18. It starts with the sender transmitting data through the<br />

network to a receiver at the other end. The total system latency is known as the end-to-end delay. It<br />

consists of the time taken to send the first bit of a packet to the time it takes to receive the last bit in the<br />

stream of data, i.e.,<br />

• delay in processing the data at the sending end,<br />

• transit delay within the network,<br />

• delay in processing the data at the receiving end.<br />

With the use of SoC, latency has been reduced and this reduction is projected to continue as the technology<br />

feature is getting finer. The trend is illustrated in Fig. 42.19. Several SoCs may themselves be integrated<br />

in one multichip module (MCM) as will be discussed next.<br />

© 2002 by CRC Press LLC

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!