Process of information transmission pdf

The receiving light direction can be differentiated and selected by selecting the light-receiving part in the array. As the results of driving the electronic device and the optical device of the present invention, it was confirmed that an optical interconnect was formed between the ports and the prescribed function could be conducted.

More specifically, the optical circuit worked effectively which has a means for changing the emission angle range and the emission direction suitably depending on the communication contents. Such a circuit substrate has high freedom in wiring not only in the electronic circuit but also in optical wiring circuit with flexible interconnection.

With such a constitution, by conducting the communication system described below, high-speed communication can be realized over a relatively long distance. A process for information transmission employing the above constitution is explained below.

The process of information transmission by light between ports in this example comprises a step of establishing a communication path, and a step of transmitting data through the communication path to transmit intended information. Since 2D optical waveguide is used by plural ports in common, the reliability in information transmission can be increased by establishing the communication paths.

As shown in the flow chart of FIG. In such a communication process, in which light is allowed to propagate in a large emission angle range in establishing the communication path, the communication is feasible between ports in a broader region, and information can be transmitted to an intended port selected form many ports.

Moreover, the data transmission is conducted by light propagation in a smaller emission angle range, whereby the communication can be conducted with a sufficient light intensity for data transmission at a high speed and high reliability. This effect is explained below in more detail. In light propagation in a large emission angle, the light is effective only in the direction of signal reception, light in other directions being wasted.

Therefore, for high-speed and reliable transmission, the emission angle is preferably smaller. On the other hand, in a smaller emission angle, the number of communication partners will be smaller, and the freedom degree of the circuit will be low. Such contradiction can be overcome effectively by the communication system which is capable of varying the aforementioned emission angle. Generally, the quantity of data for establishing a communication path is small, and the speed of the path establishment is determined by physical circuit switching time rather than by data transmission speed.

Therefore, the data transmission speed in the communication path establishment need not be so high practically. Further, in the communication path establishment, the lower data transmission speed enables the higher reliability in information transmission even with a smaller quantity of light reaching the receiving port, thus enabling information transmission to wider area.

On the other hand, the quantity of the data to be transmitted is large, so that a higher speed is desirable for the data transmission. For this reason, the aforementioned selection of the data transmission speed in this communication system can be a preferred technique. In such a manner, the above circuit and optical circuit device realizes an information transmission process which is capable of transmitting data through a common light-transmissive medium at a high speed and with high reliability.

This process achieves an effect of lower power consumption by selecting suitably the emission angle range or emission direction.

For instance, two emission angles may be employed: e. The emission angle is preferably made variable continuously, but may be variable discontinuously. In emission in a small emission angle, the emission direction is preferably changeable.

In other words, port has preferably both a means for switching the diffusion and the beam emission and a means for setting the beam direction. Such a communication method not only enables switching of one-to-one port combinations but also enables switching of the transmission paths to one-to-plural port combinations as shown in FIG.

Generally, the intensity of the received light varies depending on the propagation distance from the position of the optical device on light transmission sheet , which decreases the reliability of signal transmission. However, the above communication process is effective regardless of the position of the optical device.

The aforementioned circuit substrate in which an electronic circuit and an optical circuit are coexisting, and the communication process suitable therefor enable reconstruction of a flexible circuit which is less affected by electromagnetic emission noise and has high freedom in design, and also enable processing a large quantity of information at a high speed.

The use of a 2D waveguide, namely a light transmission sheet, for the optical circuit realizes the above communication process, and enables mounting of an optical device light-emitting element or light-receiving element on a desired position, and information transmission between arbitrary positions. The circuit substrate has effects of ease of optical positioning for optical coupling between an optical device and a waveguide layer.

Further, owing to the simple constitution, the circuit substrate can readily be formed in a thin shape with a high density of the circuit. In Example 2, the circuit substrate described in Example 1 and another communication process is employed. Usually, the nearest port a in FIG. The combination of one electronic device with port is not preliminarily fixed, but port is designated every time when optical wiring connection becomes-necessary.

Therefore, the number of ports prepared may be much less than the number of optical wiring devices Thus, the communication path is established between port E and port H in steps and , and the data is transmitted in step The flow of the operation is explained below in more detail.

For this signal emission, light-emitting element x in FIGS. The communication-requesting signal may include the address of port E, an information quantity to be transmitted, the address of LSI , and the like information.

In this case, the quantity of the requested signal is bytes and the signal transmission speed is kbps. In step , port H having received the communication-requesting signal returns a standby signal only when it can receive communication.

The reception or no-reception depends on the state of communication with another port , a presence of empty memory nearby for storing a data to be received, and other factors. The standby signal includes the address of port H. The emission angle for the signal return is not limited insofar as port E can receive the returned signal, but a wider emission angle is preferred because of needlessness of establishment of the emission direction.

In the case where port E and port H are connected by electric wiring, the return signal may be transmitted through the electric wiring. The capacity of standby signal is bytes, and the signal transmission speed is kbps.

The signal is returned from all of the port which can accept the signal in addition to port H. In step , port E having received the standby signal transmits data in a second emission angle toward signal-receiving port H. In the case where port E has received the standby signal from plural ports , port E selects the most suitable port.

For instance, one of the ports is selected to be nearest to LSI b to which the information is finally transmitted. Otherwise, the port of the quickest response may be selected. A priority order of the port selection may be preliminarily decided. More specifically, in a light-outputting part as shown in FIGS.

The communication speed in the data transmission is 50 Mbps. Since the second emission angle is smaller than the first emission angle, the signal can be treated at a high speed. In this Example, the information is transmitted to one port , but may be transmitted to plural ports simultaneously. If signal-emitting port E receives no standby signal within a predetermined time, the communication-requesting signal is emitted again by re-start from step By such a technique, the wiring between LSIs can be switched as desired.

In other words, the circuit can be reconstructed. For instance, the circuit for transmission of data from port E to port H can be switched successively to transmit data from port C to port D and port F, and so forth.

According to this Example, the circuit can be switched in a relatively short time, and data can be transmitted precisely. Further, in communication path establishment, the information is transmitted in a large emission angle range at a low communication speed, whereby the information can be transmitted over a large region.

On the other hand, in transmission of an intended main data, the emission angle range is made smaller, whereby sufficient quantity of light can be transmitted to the signal receiving port at a high speed with high reliability. With such a technique, by selecting optimum emission angle range, the energy for the information communication is effectively used effect of reduction of power consumption.

The circuit substrate of Example 3 has two light-emitting elements in port The other constitution is similar to that in Example 1. In this Example, information is transmitted with higher reliability by using a higher-grade communication system in comparison with Example 2. The communication process of this Example is explained by reference to the flow chart of FIG. If the reply or other communication is not obtained during the communication, the communication becomes error, and the signal transmission should be re-started from the first step.

The receiving port can be designed to recognize, as correct signals, only the data received within a certain time after the back transmission of the standby signal for higher reliability of the circuit. Samuel November 25, at pm. You are welcome Miss Lee Miranda. I appreciate. October 21, at pm. Thank you so much. This is so explicit. Samuel October 23, at pm.

Adam Ahmad December 11, at am. Samuel December 14, at pm. Yunus Lawan January 19, at pm. Clever May 22, at pm. Nice teaching actually I am looking for the importance of information transmission. Samuel May 24, at am. Samuel June 3, at am. Samuel June 17, at am. Please kindly use any of these three options to search for lessons or contents. Thank you and I hope you are enjoying your study here. Meg July 27, at pm. Sorry, a shareable link is not currently available for this article. Provided by the Springer Nature SharedIt content-sharing initiative.

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