Title :
Unguided optical communication bus for next-generation computers: Design concept
Author :
Bykhovsky, Dmitry ; Arnon, Shlomi
Author_Institution :
Unit of Electro Opt. Eng., Israel Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel
Abstract :
In order to further scale down the size of computers and increase their speed, optical technology is expected to substitute electrical technology for inter-chip motherboard communication. The increasing inter-chip requirements makes it extremely difficult to overcome the delay, power, and bandwidth limitations of the existing electrical wires technology In this research, unguided optical communication bus (UOCB) design for inter-chip communication is analyzed. A UOCB includes transceiver arrays for each chip that transmit information without a waveguide, such that an array of beams propagates through a solid plate. The solid plate is the computer motherboard and is used to hold the chip physically and, in addition, as a propagation medium for the communication beams. The bus space is reused, or multiplexed, such that more than one beam propagates though it simultaneously. The communication through the bus takes advantage of the scattering effect, reflection and diffusion from the walls. We examined the data transmission requirement for uncorrelated optical communication paths between the multiple-input multiple-output (MIMO) optical receiver and transmission arrays over highly diffused propagation bus. Each optical communication path between potential receiver and transmitter locations was described in terms of the optical channel gain, representing the individual optical path. An example of a MIMO gain matrix H between multiple spatial locations was evaluated.
Keywords :
MIMO communication; data communication; next generation networks; optical communication; optical transceivers; MIMO optical receiver; communication beams; data transmission; electrical wires; inter-chip motherboard communication; multiple-input multiple-output; next generation computers; optical channel gain; propagation bus; scattering effect; transceiver arrays; transmission arrays; transmitter; uncorrelated optical communication; unguided optical communication bus; MIMO; Optical fibers; Optical interconnections; Optical receivers; Optical reflection; Optical scattering; Optical transmitters; FSO; free-space optical communication; optical MIMO; optical backplane; optical bus; spatial multiplexing;
Conference_Titel :
Electrical and Electronics Engineers in Israel (IEEEI), 2010 IEEE 26th Convention of
Conference_Location :
Eliat
Print_ISBN :
978-1-4244-8681-6
DOI :
10.1109/EEEI.2010.5661945