Abstract:
A system for network topology includes a first edge router node and a plurality of first sensors operatively connected to the first edge router node. A second edge router node is operatively connected to the first edge router node and to the plurality of first sensors. A plurality of second sensors are operatively connected to the second edge router node and to the first edge router node. The first and second edge router nodes are operatively connected to a cloud server through a respective cloud connection, so that in the event of one of the cloud connections becoming unavailable the plurality of first and second sensors in the system can remain operatively connected to the cloud server through the remaining cloud connection.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This application claims the benefit of and priority to U.S. Provisional Patent Application No. 62/092,468, filed Dec. 16, 2014. The entire application is incorporated herein by reference in its entirety. 
     
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
       [0002]    The present disclosure relates to communication networks, and more particularly communication network configurations. 
       2. Description of Related Art 
       [0003]    The arrangement of a network of nodes and links is defined by a network topology. The network topology can determine the physical and logical interconnections between the network nodes, where each node has one or more links to one or more other nodes. The physical topology of a network is determined by the configuration of the physical connections between the nodes. The configuration can be represented by a multi-dimensional geometric shape, for example, a ring, a star, a line, a lattice, a hypercube, or a torus. The logical topology of a network is determined by the flow of data between the nodes. 
         [0004]    Traditional network topologies typically have an edge router that is connected outside the system, e.g., to a cloud server. In addition, in certain applications like security and access systems, the nodes as well as edge router can only transmit 2 seconds per hour based on specific market and regulatory restrictions. This restricts the number of sensor nodes connected to a single edge router. 
         [0005]    Such conventional methods and systems have generally been considered satisfactory for their intended purpose. However, there is still a need in the art for improved network topology. The present disclosure provides a solution for this need. 
       SUMMARY OF THE INVENTION 
       [0006]    A system for network topology includes a first edge router node and a plurality of first sensors operatively connected to the first edge router node. A second edge router node is operatively connected to the first edge router node and to the plurality of first sensors. A plurality of second sensors are operatively connected to the second edge router node and to the first edge router node. The first and second edge router nodes are operatively connected to a cloud server through a respective cloud connection, so that in the event of one of the cloud connections becoming unavailable the plurality of first and second sensors in the system can remain operatively connected to the cloud server through the remaining cloud connection. 
         [0007]    The plurality of first and second sensors can communicate with the first edge router node and the second edge router node using frequency bands having transmit time limitations. In certain embodiments, communication between sensor and edge router nodes occur in frequency bands without transmit time limitations when communication requiring wider bandwidth takes place. The first and second edge routers, can communicate using frequency bands without transmit time limitations. Communication through the cloud connections can be, but is not limited to, WiFi, Bluetooth, GPRS and PSTN. The first and second edge router nodes can be wall powered while the plurality of first and second sensors can be battery operated. 
         [0008]    The system can further include a third edge router node operatively connected to the first and second edge router nodes and a plurality of third sensors operatively connected to the third edge router node and the first edge router node. In alternate embodiments, the system can include a third edge router node operatively connected to the first edge router node and to the cloud server and a plurality of third sensors operatively connected to the third edge router node and the first edge router node. 
         [0009]    The first edge router node can be a main edge router node to the first plurality of sensors and the second edge router node can be an alternate edge router node to the first plurality of sensors. The second edge router node can be a main edge router node to the second plurality of sensors and the first edge router node can be an alternate edge router node to the second plurality of sensors. 
         [0010]    A system for network topology includes a plurality of edge router nodes, including a first and second edge router node. The first and second edge router nodes are operatively connected to a cloud server. A plurality of sensors is operatively connected the edge router nodes, such that a portion of the plurality of sensors are operatively connected to the first and second edge router nodes such that the first and second edge router nodes have a wireless link to the portion of the plurality of sensors. 
         [0011]    A network topology for a security and access authorization system includes at least two edge router nodes operatively connected together. At least one sensor is operatively connected to the at least two edge router nodes. A cloud server is operatively connected to the at least two edge router nodes and an alarm is operatively connected to the cloud server. Such that in the event of one of the cloud connections becoming unavailable the plurality of first and second sensors in the system can remain operatively connected to the cloud server through the remaining cloud connection. 
         [0012]    The at least one sensor can sense a hazardous condition and can communicate the hazardous condition to the alarm through the edge router nodes and the cloud server. 
         [0013]    These and other features of the systems and methods of the subject disclosure will become more readily apparent to those skilled in the art from the following detailed description of the preferred embodiments taken in conjunction with the drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]    So that those skilled in the art to which the subject disclosure appertains will readily understand how to make and use the devices and methods of the subject disclosure without undue experimentation, preferred embodiments thereof will be described in detail herein below with reference to certain figures, wherein: 
           [0015]      FIG. 1  is a schematic view of an exemplary embodiment of a network topology constructed in accordance with the present disclosure, showing a plurality of sensors and a plurality of edge router nodes; and 
           [0016]      FIG. 2  is a schematic view of the network topology of  FIG. 1  in use in a security system, showing a plurality of network devices. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0017]    Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject disclosure. For purposes of explanation and illustration, and not limitation, a partial view of an exemplary embodiment of a network topology in accordance with the disclosure is shown in  FIG. 1  and is designated generally by reference character  100 . Other embodiments of the network topology in accordance with the disclosure, or aspects thereof, are provided in  FIG. 2 , as will be described. 
         [0018]      FIG. 1  illustrates an exemplary embodiment of a network topology in accordance with the present disclosure. Network topology relates to the configuration of nodes which communicate with each other to comprise a system of communication for sharing and transmitting data packets. The network topology described herein can be used as a network communication system, such as a security system as will be shown and described in more detail. The system  100  including the disclosed network topology, as shown in  FIG. 1 , is comprised of a plurality of edge router nodes  102   a - c  and a plurality of sensors  104   a - c . The edge router nodes  102   a - c  are used to relay information between a cloud server  106  and the sensors  104   a - c . Each edge router node  102   a - c  is operatively connected to a plurality of sensors  104   a - c , which may form a star around the edge router node  102 . For example, sensors  104   a  may form a star around edge router node  102   a . The communication between the edge router nodes  102   a - c  and between edge router nodes  102   a - c  and sensors  104   a - c  can be through wires or can be through wireless communication. The edge router nodes  102   a - c  are generally wall powered devices with battery backup power while the sensors  104   a - c  are generally battery powered. Every edge router node  102   a - c  is connected to a minimum of one other edge router node  102   a - c  if that edge router node  102   a - c  is connected to the cloud server  106 . However, if the edge router node  102   a - c  is not connected to the cloud server  106 , the edge router node  102   a - c  is connected to at least two edge router nodes  102   a - c . As shown in  FIG. 1 , edge router nodes  102   a  and  102   c  are connected to the cloud server  106  and to edge router node  120   b , respectively. Edge router node  102   b  is not connected to the cloud server and is connected to both edge router nodes  102   a  and  102   c . Each sensor  104   a - c  is operatively connected to more than one, preferably two or more edge router nodes  102   a - c . In this manner, if a sensor  104   a - c  loses connection with a main edge router node  102   a - c , an alternate edge router node  102   a - c  can be used. For example, as shown in  FIG. 1 , a portion of sensors  104   a  are connected to edge router  102   b . The main edge router nodes  102   a - c  connections (represented by a single line) and alternative edge router node connections  102   a - c  (represented by a dashed line) for a given sensor are defined by the edge router nodes  102   a - c  with strongest wireless link to a particular sensor  104   a - c . For ease of illustration, a portion of the sensors  104   a - c  are shown connected to an alternate edge router node  102   a - c . Those skilled in the art will understand that the remaining sensors  104   a - c  are also connected to a respective alternate edge router node as described. 
         [0019]    Two or more of the edge router nodes  102   a  and  102   c  are operatively connected to a cloud server  106  for increased bandwidth and adding communication path redundancy compared to traditional systems, where a damaged edge router would cause total system failure. The cloud server  106  acts to receive and transmit information to and from each sensor  104   a - c  either within the system or to a central location. Having sensor  104   a - c  connected to more than one edge router node  102   a - c  and having plurality of edge router nodes  102   a - c  connected to at least one other edge router node  102   a - c  creates a more robust and reliable wireless network which allows for combined coverage compared to typical network topologies. Moreover, as regulations in certain frequency bands and markets require that sensors  104   a - c  communicating with other edge router nodes  102   a - c  can only transmit 2 s/hour, the disclosed network topology allows a greater number of sensors  104   a - c  to be connected through the disturbed edge router nodes  102   a - c , which can communicate without restriction thereby allowing for increased speed in communication and relay of information. More specifically, as shown in  FIG. 2 , communication between edge router nodes  102   a - d  and sensors  104   a - d  (represented by a single line) remains at a ultra high frequency (UHF) band frequency, for example, 433 MHz, using 6LoWPAN (IPv6 over Low power Wireless Personal Area Networks) at 2 s/hour to follow regulation requirements. In certain embodiments, communication between sensors  104   a - d  and edge router nodes  102   a - d  can occur using frequency bands having no transmit time limitations, for example 2.4 GHz or 915 MHz bands in the U.S. and 2.4 GHz or 868 MHz in Europe, if a firmware upgrade or other communication requiring a wider bandwidth takes place. Edge router nodes  102   a - d  can communicate with other edge router nodes  102   a - d  (represented by a double line) at a higher data rate at a different frequency than the sensor  104   a - d  to edge router  102   a - d  frequency, for example, 800-900 MHz using 6LoWPAN with no time limit restrictions. Communication between edge router nodes  102   a - d  and the cloud server  106  can be through, but is not limited to, WiFi, Bluetooth, general packet radio service (GPRS) and public switched telephone network (PSTN). In this manner the same packet can go unmodified from the sensor to the cloud server. For example, if transmission from sensor to edge router node uses 6LoWPAN, transmission from edge router node to edge router node uses 6LoWPAN, and edge router to cloud uses IPv6. Those skilled in the art will readily understand that 6LoWPAN is one method for data delivery, however other known methods may be used without departing from the scope of the present disclosure. 
         [0020]    With continued reference to  FIG. 2 , an exemplary embodiment of the system using the network topology of the present disclosure as a home security system having sensor nodes  104   a - d  in communication with an alarm  110  is illustrated. In this embodiment, edge router nodes  102   a - d  can be any device connected to wall power, for example, a light fixture, fan, humidifier, wall outlet, switch, or the like. Sensor nodes  104   a - d  are used for sensing a hazardous condition. For example, if a door  120  is left open, a window  130  is cracked open, and/or extreme heat from a fire is present. As shown in  FIG. 2 , a plurality of sensors  104   a - d  are operatively connected to at least two edge router nodes  102   a - d  to communicate detection of a hazardous condition from each sensor  104   a - d . The communication between the sensors  104   a - d  and edge router nodes  102   a - d  are represented by a single line and/or dashed line to illustrate a main or alternate edge router node, respectively. The single lines and/or dashed lines also illustrate the limited transmission time and duty cycle between sensors  104   a - d  and edge router nodes  102   a - d . Two or more edge router nodes  102   a - d  are connected to a cloud server  106  (represented by a triple line), which in turn is connected to a control panel  108  and the alarm  110 . Edge router nodes  102   b  and  102   d  not connected to the cloud server are connected to other edge router nodes, as represented by a double line. The double line also illustrates no time limit for transmission between edge router nodes  102   a - d . For ease of illustration, control panel  108  and alarm  110  are shown connected only to cloud server, however, in additional embodiments, control panel  108  can also be one of the edge router nodes  102   a - d . In addition, cloud server  106  can communicate wirelessly to a standalone product, such as a mobile electronic device or a door lock. In use, when a sensor  104   a - d  senses a hazardous condition, i.e., a window  130  left open, sensor  104   a - d  transmits the data to the respective edge router node  102   a - d . The edge router node  102   a - d  relays the message or data packet from the sensor  104   a - d  to the cloud server  106  which in turn transmits the information to the control panel  108  and control panel  108  sets off the alarm  110 . 
         [0021]    Those skilled in the art will readily understand the network topology is shown described for a home security system however other uses requiring data to be transmitted and shared throughout a secured network are contemplated without departing from the scope of the present disclosure. Moreover, while shown and described in the exemplary context of nodes as sensors those skilled in the art will readily appreciate that any other suitable type of device can be used as a node connected to edge routers without departing from the scope of the this disclosure. 
         [0022]    The methods and systems of the present disclosure, as described above and shown in the drawings, provide for network communication with superior properties including advanced topology for a network. While the apparatus and methods of the subject disclosure have been shown and described with reference to preferred embodiments, those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the spirit and scope of the subject disclosure.