DESC:FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)

Title: A METHOD AND A SYSTEM FOR ADDRESSING SIGNAL LOSS DUE TO UNKNOWN ARBITRARY SYSTEM CONNECTIVITY IN MULTIDROP CONNECTIVITY FOR DIFFERENTIAL ELECTRICAL STANDARD BUS

APPLICANT DETAILS:
(a) NAME: BHARAT ELECTRONICS LIMITED
(b) NATIONALITY: INDIAN
(c) ADDRESS: OUTER RING ROAD, NAGAVARA, BANGALORE 560045,
INDIA

PREAMBLE TO THE DESCRIPTION:
The following specification (particularly) describes the nature of the invention (and the manner in which it is to be performed):

A METHOD AND A SYSTEM FOR ADDRESSING SIGNAL LOSS DUE TO UNKNOWN ARBITRARY SYSTEM CONNECTIVITY IN MULTIDROP CONNECTIVITY FOR DIFFERENTIAL ELECTRICAL STANDARD BUS

FIELD OF INVENTION:
The present disclosure relates to digital signal processing. The disclosure, more particularly, relates to a method and a system for addressing signal loss due to unknown arbitrary system connectivity in multi-drop connectivity for differential electrical standard bus.

BACKGROUND OF THE INVENTION:
The following background discussion includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication expressly or implicitly referenced is prior art.
In general, TIA/EIA-422 specifies electrical characteristics of digital signaling circuit and balanced signal. It provides data transmission with unidirectional, terminated or non-terminated transmission lines in point to point or multi drop connectivity. The decision whether or not to use termination should be based on the cable length and data rate used by the system. A good rule of thumb for requirement for termination is when the propagation delay of the data line is more than one bit width.
In practice, when multiple systems are integrated, the cable lengths required increase to a few meters. In such a scenario, if the line is not terminated then the transmitted signal is not completely absorbed, and a portion is reflected back into the transmission line. Reflections interfere with real data and can cause errors. Solution is to add a terminating resistor in parallel with the receiver's A and B lines in order to match the characteristic impedance of the communications cable typically ranging from 80 to 120 ohms. In RS422 a driver/transmitter can send signal to multiple receivers. Hence, for appropriate termination the terminating resistor is introduced at the farthest end receiver.
During integration of a system in a network of systems, which include third party or legacy systems (herein, referred as unknown arbitrary system) the termination for a receiver end inside the unknown system is in question due to its operational state. If multiple signals are transmitted from the driver as a bus in multi drop connectivity, then it is much more complex to identify the terminations across all differential pair’s signals and also control the terminations for each signal pair of entire bus.
If a pre-determined setup in network of systems is established and the system is developed with terminations suited for this setup. The challenges in this scenario are that the designed systems may not be compatible with any other configuration of network of systems. If a system is designed by considering unknown arbitrary system is deployed with terminations at receiver end, then the designed system cannot be integrated without this unknown arbitrary system in
network of systems. If a system is designed by considering unknown arbitrary system is deployed without terminations or without any unknown system at receiver end, then the designed system cannot be integrated with an unknown arbitrary system pre-fixed with terminations in network of systems. Deployment with multiple terminations in network systems can cause improper impedance and leads to signal degradation. This might lead to multiple variants of the same system based on the individual deployment scenarios, which will lead to integration issues due to lack of interchangeability in similar systems.
The main difficulties to be resolved is as below:
Control the termination in a multi-drop connectivity when an unknown arbitrary system is introduced.
Termination has to be configurable for addressing multiple types of connectivity in a network.
When multiple signals are branched at each receiver, termination of each differential pair signal has to be ensured for all types of connectivity in a network.
Different design configurations of similar system for multiple deployment scenarios.
US11207607 B2 discloses a method, modules and a system formed by connecting the modules for controlling payloads are disclosed. An activation signal is propagated in the system from a module to the modules connected to it. Upon receiving an activation signal, the module (after a pre- set or random delay) activates a payload associated with it, and transmits the activation
signal (after another pre- set or random delay) to one or more modules connected to it . The system is initiated by a master module including a user activated switch producing the activation signal. The activation signal can be propagated in the system in one direction from the master to the last module, or carried bidirectionally allowing two way propagation, using a module which revert the direction of the activation signal propagation direction. A module may be individually powered by an internal power source such as a battery or connected to external power source such as AC power. The system may use remote powering wherein few or all of the modules are powered from the same power source connected to the system in a single point. The power may be carried over dedicated wires or concurrently with the conductors carrying the activation signal. The payload may be a visual or an audible signaling device , and can be integrated within a module or external to it . The payload may be powered by a module or using a dedicated power source and can involve randomness associated with its activation such as the delay, payload control or payload activation.
US11245210 B2 discloses a connector system includes a housing with a paddle card. One side of the paddle card includes a plurality of rows of signal terminations. Another side of the paddle card includes a single row of cable terminations. Cable management members may be used to support the rows of signal terminations. A shield member may be used to improve the electrical performance of the signal terminations.
US10999106 B2 discloses a Multi -drop communications channels can have significantly deep notches in their frequency response causing a corresponding limitation of the effective data transmission rate. A special time - ordered coding method is described which results in the emitted spectrum of the data stream transmitted into the channel having a notch at the same frequency as the notch in the channel frequency response, permitting channel receivers to successfully decode the transmitted data stream. The described coding method may be applied at various multiples of the channel notch frequency to support different throughput rates, and may be combined with other coding techniques such as group or vector signaling codes.
Therefore, there is a need for an invention which provides passive approach for addressing signal loss due to unknown arbitrary system connectivity in multi-drop connectivity for differential electrical standard bus.

OBJECTIVES OF THE INVENTION:
The primary object of the present invention is to overcome the problem stated in the prior art.
Another object of the present invention is to provide a method and a system for addressing signal loss due to unknown arbitrary system connectivity in multi-drop connectivity for differential electrical standard bus.

SUMMARY OF THE INVENTION:
The present invention provides a system for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus comprising:
a) a terminal block configured to distribute signals to a plurality of receivers, where the terminal block comprises an extended port for multi-drop connectivity with all the signals; and
b) a dedicated termination port with plurality of terminating resistors planted on it for each differential pair signal in the system;
wherein when no unknown arbitrary system is connected at receiver end in the network of systems, then termination port is connected to extended port.
In an embodiment, the system is applicable for a single driver signal or multiple driver signals in bus type connectivity.
In an embodiment, the system is suitable in the network of systems with multi-drop connectivity for RS422 or other electrical standards with single port termination.
The present invention provides a method for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus comprising steps of:
a) distributing signals to a plurality of receivers by a terminal block, where the terminal block comprises an extended port for multi-drop connectivity with all the signals; and
b) mounting plurality of terminating resistors on a dedicated termination port for each differential pair signal in the system;
wherein when no unknown arbitrary system is connected at receiver end in the network of systems, then termination port is connected to extended port.

DETAILED DESCRIPTION OF DRAWINGS:
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of their scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings in which:
Fig. 1: illustrates a illustrates normal termination methodology of a single RS422 signal in Multi-drop connectivity.
Fig. 2: illustrates RS422 Single Signal Multi-drop – Termination Unknown.
Fig. 3: illustrates a RS422 Single Signal Multi-drop – Configurable Termination.
Fig. 4: illustrates RS422 Multiple Signals Multi-drop –Termination at farthest Receiver end.
Fig.5: illustrates RS422 Multiple Signals Multi-drop – Termination Unknown.
Fig. 6: illustrates RS422 Multiple Signals Multi-drop – Configurable Termination

DETAILED DESCRIPTION:
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the invention and are not intended to be restrictive thereof.
The terms “comprises”, “comprising”, “includes”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a setup, device or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus proceeded by “comprises... a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
The present disclosure is related to novel architecture a configurable termination option for multiple RS422 receiver end signals.
In an embodiment, the present invention provides system for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus comprising:
c) a terminal block configured to distribute signals to a plurality of receivers, where the terminal block comprises an extended port for multi-drop connectivity with all the signals; and
d) a dedicated termination port with plurality of terminating resistors planted on it for each differential pair signal in the system;
wherein when no unknown arbitrary system is connected at receiver end in the network of systems, then termination port is connected to extended port.
In an embodiment, the system is applicable for a single driver signal or multiple driver signals in bus type connectivity.
In an embodiment, the system is suitable in the network of systems with multi-drop connectivity for RS422 or other electrical standards with single port termination.
In an embodiment, the present invention provides a method for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus comprising steps of:
a) distributing signals to a plurality of receivers by a terminal block, where the terminal block comprises an extended port for multi-drop connectivity with all the signals; and
b) mounting plurality of terminating resistors on a dedicated termination port for each differential pair signal in the system;
wherein when no unknown arbitrary system is connected at receiver end in the network of systems, then termination port is connected to extended port.
The current invention discloses a novel method to configure the termination of EIA/RS422 differential signals in a multi-drop connectivity. When an unknown arbitrary system is introduced in a multi-drop connectivity the termination of entire network of systems will be affected. This is much more prominent when a multiple signal bus is connected in the network. When multiple signals are branched at each receiver, termination of each differential pair signal has to be ensured for all types of connectivity in a network. Different design configurations of similar system for multiple deployment scenarios shall be avoided with the proposed solution. This solution helps in ease of integration and isolation of the termination module from the system chain.
The implementation and use case of the mentioned solution is explained below:
A terminal block is implemented to distribute the signals to multiple receivers.
The terminal block is also provisioned with an extended port in the multi-drop connectivity with all the signals.
The terminal block is provisioned with a dedicated termination port with terminating resistors planted on it for each differential pair signal in the system.
When an unknown arbitrary system with terminating resistors is connected at receiver end in the network of systems, then termination port is left unconnected.
When an unknown arbitrary system with no terminating resistors is connected at receiver end in the network of systems, then termination port is connected to extended port.
When no unknown arbitrary system is connected at receiver end in the network of systems, then termination port is connected to extended port.
The main benefits present invention is as explained:
Configuration based termination control for network of systems with multi drop connectivity.
Ease in integrating and isolation of the termination module from the system chain.
Flexibility of system for integration in different deployment scenarios.
In one embodiment, a method of configurable passive termination of differential signals in a multi-drop connectivity.
In another embodiment, the system is applicable for a single driver signal or multiple driver signals in bus type connectivity.
In another embodiment, the method of addressing the signal loss due to termination issues when an unknown arbitrary system is connected in a network of systems.
In another embodiment, the system is meant for a single unknown arbitrary system where in the termination of one or group of signals cannot be controlled in deployment scenario.
Figure-1. and Figure-4. depict the resistive termination at farthest end receiver for each signal from the driver connected to receiver. This is an ideal way of connectivity in a network when all the systems can be varied and configured as per the deployment system installation requirements. Fig2. And Fig5. Depicts the scenario where in a COTS i.e., unknown arbitrary system is available in the network of systems and cannot be varied or modified as per the deployment system requirements. Here, the termination in the network is affected by unknown arbitrary system.
There are multiple deployment scenarios feasible with the multiple receiver configurations. The following are the possible scenarios:

Figure-2. shows the scenario in which an unknown arbitrary system is introduced into single RS422 signal in Multi-drop connectivity and affecting termination of the network.
Figure-5. shows the scenario in which an unknown arbitrary system is introduced in to multiple signal bus of RS422 in Multi-drop connectivity and affecting termination of the network.
Figure-3. and Figure-6. depicts the configurable termination port in the network of systems for each signal from the driver to be terminated or left open.
When the unknown arbitrary system is already pre-fixed with termination for each of the signal, then extended port need not be connected to termination port because of the available terminations. Here, the other controllable systems for termination are not deployed with any terminations. The following table are various configurations for the extended port to termination port connectivity when the unknown arbitrary system is having terminations:

When the unknown arbitrary system is not having terminations for the signals, then extended port needs to be connected to termination port because of the unavailable terminations. Here, the other controllable systems for termination are not deployed with any terminations. The following table are various configurations for the extended port to termination port connectivity when the unknown arbitrary system is not having terminations:

The present invention can be suitably applied in the network of systems with multi-drop connectivity for RS422 or other electrical standards with single port termination. It is last it is to be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.
While various embodiments of the present disclosure have been illustrated and described herein, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the disclosure, as described in the claims.
The foregoing description of the invention has been set merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the substance of the invention may occur to person skilled in the art, the invention should be construed to include everything within the scope of the invention.
,CLAIMS:We Claim:

1. A system for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus comprising:
a) a terminal block configured to distribute signals to a plurality of receivers, where the terminal block comprises an extended port for multi-drop connectivity with all the signals; and
b) a dedicated termination port with plurality of terminating resistors planted on it for each differential pair signal in the system;
wherein when no unknown arbitrary system is connected at receiver end in the network of systems, then termination port is connected to extended port.
2. The system for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus as claimed in claim 1, wherein the system is applicable for a single driver signal or multiple driver signals in bus type connectivity.
3. The system for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus as claimed in claim 1, wherein the system is suitable in the network of systems with multi-drop connectivity for RS422 or other electrical standards with single port termination.
4. A method for addressing signal loss due to unknown arbitrary system connectivity in multidrop connectivity for differential electrical standard bus comprising steps of:
a) distributing signals to a plurality of receivers by a terminal block, where the terminal block comprises an extended port for multi-drop connectivity with all the signals; and
b) mounting plurality of terminating resistors on a dedicated termination port for each differential pair signal in the system;
wherein when no unknown arbitrary system is connected at receiver end in the network of systems, then termination port is connected to extended port.