DE1801999B2 - Broadband transmission channels showing a message transmission system with a large number of participants - Google Patents

Description

moderately thin and sufficiently flexible (also with regard to minor disturbances that occur when bending can!), so that the disadvantages mentioned do not apply to the installation. The implementation required of the messages to be transmitted to one accordingly modulated light beam is relatively easy with the known means of laser technology possible.

A disadvantage of the optical fibers can be seen in the fact that that they have a relatively high damping. Therefore, the signal attenuation is rolled into one Message transmission system made of optical fibers through intermediate amplifiers made of semiconductor components canceled. According to current knowledge, the maximum distance between the intermediate amplifiers is about 100 meters. Since the repeaters regenerate the message flow at the same time and as connection points required for the subscribers, however, is the high repeater density for the communication system not disadvantageous.

In addition to the actual Information channel - the fiber optic line - lay a wire cable parallel to this, which also can be used to transmit service marks.

1 sheet of drawings

Claims (5)

place again separated from each other and assigned to the individual claims: participants. Here, too, central hiring facilities are necessary that 1. Show broadband transmission channels - take a lot of effort, the message transmission system with a 5, Variety of participants doing the information task exchange, which is after the time division of the invention specified in claim 1 or time-function multiplex processes allow the task of connecting a telephone network. and each have identifiers which, with a high degree of freedom from interference, without central switching their differentiation from one another and their access devices.
Allow order to the participants, and in which each participant has the entire disadvantage directional flow is monitored and automatically certain information is used on the basis of the co-transmission madiuir, so that a large part txagenenKennungen selects, gekenazeichner number can exchange messages. It is net due to the combination of the following characteristics, no central unit required. Advantageous further training times fertilizing of the invention are in the subclaims a) that optical fibers are described as the transmission medium. If the system is designed according to and the messages in claim 2, the system can be expanded in a simple manner without the form of modulated light beams via line loops. In order to avoid disturbing wear, reflections from the cable ends, b) that the transmission system as a 2-channel l- the system according to claim 3 is formed. the Way network is formed. Energy supply and service signal transmission 2. System according to claim 1, characterized is advantageously carried out according to claim 4,
due to its structure as a star network. 25th 3. System according to claim 1 or 2, thereby explaining the invention
characterized in that all transmission lines. In the following, the invention will be completed by means of reflection-free sinks, and 2 described in more detail. 4. System according to one of claims 1 to 3, F i g. 1 shows the telephone network according to the invention, characterized in that, together with the 30, it is designed as a 2-channel 1-way network. The fiber optic cable is a cable for the energy supply both channels α and b are laid on both sides with reflection and service signal transmission. free lowering 5 completed. 5. System according to one of claims 2 or 3. You can, for example, lead from two parallel, characterized in that the star network is expanded by th lines with opposite information additional branch points. 35 river exist. Repeaters V are arranged in each channel. Each subscriber TL is with his outgoing and his incoming line ",,., Connected to two such intermediate amplifiers V, Manaaer iecnnik _{s0 that he} send m bdden directions and from both In telephony it is common to be able to receive narrow-band 40 directions,
dige channels in the way for information exchange F i g. 2 shows a long-distance network designed as a star network to assign the participants that from the central voice network. Here, too, two individual lines closed with anechoic exchanges from one channel each with a sub-sink S and with a pair of latches are made available. From this, amplifiers. V provided, with each subscriber providing an additional TL connected to two repeaters for the establishment of the connections, considerable expenditure on switching equipment; is. The channels of a path are only one-sided, however, and a very large number of narrow-banded channels must be closed off with the sinks, and channels must be made available on the other side, whereby they flow into branching points K. Any excess must be kept in reserve, branching point consists of a device K 1, which is economically unfavorable. 50 which collects all incoming information A Message transmission systems are known and transferred to a device K 2, which has become one, for example from satellite technology, since it sends out the collected information in all directions G which emit very broadband transmission media,
or carrier frequency systems as well as Waveguide arrangements. In all of these systems 55 all information sent out in the network, the messages that are transmitted should be completely available at any time. It is possible, instead of the len, to first collect and provide further branch points K for the special over-sinking S , processed over the broadband route. so that a further branching of the star network This processing consists, for example, in the fact that it becomes possible. according to the well-known method of frequency multiplexing. Have time-division multiplex or time-function multiplex bandwidth are already above carrier-free transmission each participant a sub-frequency band called quenzsysteme und waveguide arrangements assigned or a fixed time slot has been assigned to each participant. Both are complex on the one hand, and on the other hand Timeframes of the overall transmission are allocated with regard to the supply of many private parts or each participant a certain time function 65 is unwieldy. For example, it is hardly conceivable Address is assigned. The »interlocked, waveguides in apartments as telephone connections nested «information is now transferred to misplaced. It is therefore used as a transmission and optical fibers are used on the receiving side by a central receiving service. These are proportional