Patent Publication Number: US-2021191349-A1

Title: Building automation system emergency response control handoff

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of and priority to U.S. Provisional Application No. 62/950,413, filed on Dec. 19, 2019 under 35 U.S.C. 119(e), which application is incorporated by reference herein in its entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to integrating emergency detection systems into building automation systems, and more particularly to temporarily transferring control of the building control system to an authorized remote emergency service. 
     BACKGROUND 
     In the event of an emergency arising in a building, such as an office building, a school building, a theater, or the like, emergency responders or remote emergency services typically need to access building plans and locations of electrical panels, and the like, to assess and manage the emergency situation. Possible building emergencies may include fire, explosion, hazardous materials release, natural gas leaks, plumbing failure or flooding, power failure, elevator failure, and medical emergencies. Other types of emergencies perpetrated by actors may include active shooter, bomb threats and suspicious mail, demonstrations or protests, and workplace violence. Any delay in providing building plans and locations of electrical panels, and the like to emergency responders or an emergency service, could have potentially disastrous consequences. 
     SUMMARY 
     In accordance with one embodiment described herein, a server associated with a building automation system of a building, determines an occurrence of an emergency in the building, based on detection of the emergency by one or more sensors distributed at respective locations in the building. The server transmits to a remote emergency service, over a communications medium, an alert of the detected emergency. In response, the server receives from the remote emergency service, an authorized login to temporarily transfer to the remote emergency service, control of the building automation system to respond to the detected emergency. In response to the authorized login, the server transfers control of the building automation system to the remote emergency service, and allows the remote emergency service to transmit a command to one or more devices in the building automation system. When the command is received by the one or more devices, it modifies or alters operation of the one or more devices. After the detected emergency has been resolved, the server disables the temporary transfer of control by the remote emergency service of the building automation system. 
     In accordance with an embodiment described herein, in response to the authorized login, the server transmits to the remote emergency service a depiction of a floor plan of the building displaying a current location of the emergency in the building. In an embodiment, the depiction of the floor plan of the building may display operational states of the one or more devices managed by the building automation system. In an embodiment, the depiction of the floor plan of the building may be different than a depiction of the floor plan seen by operators at the building automation system. In an embodiment, the server transmits to the remote emergency service a representation of controls for controlling the one or more devices in the building automation system. The controls are associated with the command directed to the one or more devices in the building automation system to enable the remote emergency service to activate the controls and transmit the command to control the one or more devices. 
     In accordance with an embodiment described herein, the server directly receives from the remote emergency service, the command directed to the one or more devices in the building automation system, and the server issues the command directed to the one or more devices, via the building automation system. 
     In accordance with an embodiment described herein, the server causes transmission of the command by the emergency service to the building automation system, as specified in the controls. The command is then issued by the building automation system to the one or more devices. 
     In accordance with an embodiment described herein, the server causes transmission of the command by the remote emergency service directly to the one or more devices, as specified in the controls, via a router. 
     In accordance with an embodiment described herein, the controls for controlling the one or more devices in the building automation system specify destinations of the command for at least one of sprinkler control devices, door-lock control devices, gas valve control devices, emergency lock control devices, lighting control devices, public-address system control devices, or heating-ventilation-air-conditioning system control devices. 
     In accordance with an embodiment described herein, a server, comprises:
         at least one processor;   at least one memory, including computer program code, wherein the computer program code, when executed by operation of the at least one processor, causes an operation to be performed comprising:   determining, by a server, an emergency in a building, based on detection of the emergency by one or more sensors distributed at respective locations in the building;   transmitting, by the server, over a communications medium, to a remote emergency service, an alert of the detected emergency, in response to the detection of the emergency;   receiving, by the server, over a communications medium, from the remote emergency service, an authorized login to temporarily transfer to the remote emergency service control of a building automation system of the building to respond to the detected emergency;   causing, by the server via a communications medium, transmission of a command from the remote emergency service directed to one or more devices in the building automation system, wherein the command, when received by the one or more devices, modifies operation of the one or more devices;   causing, by the server via a communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service; and   disabling, by the server, the temporary transfer of control to the remote emergency service of the building automation system, after the detected emergency has been resolved.       

     In accordance with an embodiment described herein, the server further comprises:
         the at least one memory, including computer program code, wherein the computer program code, when executed by operation of the at least one processor, causes an operation to be performed further comprising:   transmitting, by the server, over an internet communications medium, data specifying a depiction of a floor plan of the building displaying a current location of the emergency in the building in response to the receipt of the authorized login; and   transmitting, by the server, over the internet communications medium, a representation of controls for controlling the one or more devices in the building automation system, the controls associated with the command directed to the one or more devices in the building automation system, the controls representing the one or more devices to enable the remote emergency service to activate the controls and transmit the command to control the one or more devices.       

     In accordance with an embodiment described herein, the server further comprises:
         wherein the depiction of the floor plan of the building displays operational states of the one or more devices managed by the building automation system for display to the remote emergency service.       

     In accordance with an embodiment described herein, the server further comprises:
         wherein the controls include an internet address of the server, the server further comprising:   the at least one memory, including computer program code, wherein the computer program code, when executed by operation of the at least one processor, causes an operation to be performed further comprising:   receiving, by the server, over the internet communications medium, from the remote emergency service, the command directed to the one or more devices in the building automation system; and   issuing, by the server, the command directed to the one or more devices, via the building automation system.       

     In accordance with an embodiment described herein, the server further comprises:
         wherein the controls include an internet address of the building automation system, the server further comprising:   the at least one memory, including computer program code, wherein the computer program code, when executed by operation of the at least one processor, causes an operation to be performed further comprising:   causing, by the server via the internet communications medium, transmission by the emergency service of the command directed to the one or more devices, to the building automation system specified in the controls, in response to the transmission of the alert and the receipt of the authorized login;   causing, by the server via the internet communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service to the building automation system, in response to the causing of the remote emergency service to transmit the command to the building automation system.       

     In accordance with an embodiment described herein, the server further comprises:
         wherein the controls include an internet address to access a router, the server further comprising:   the at least one memory, including computer program code, wherein the computer program code, when executed by operation of the at least one processor, causes an operation to be performed further comprising:   causing, by the server via the internet communications medium, transmission by the remote emergency service of the command directed to the one or more devices, to the router accessible by the controls, in response to the transmission of the alert and the receipt of the authorized login;   causing, by the server via the internet communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service to the router, in response to the causing of the remote emergency service to transmit the command to the router.       

     In accordance with an embodiment described herein, the server further comprises:
         wherein the controls for controlling the one or more devices in the building automation system specify internet addresses for at least one of sprinkler control devices, door-lock control devices, gas valve control devices, emergency lock control devices, lighting control devices, public-address system control devices, or heating-ventilation-air-conditioning system control devices.       

     In accordance with an embodiment described herein, a computer program product comprising computer executable program code recorded on a computer readable non-transitory storage medium, the computer executable program code comprises:
         code for determining, by a server, an emergency in a building, based on detection of the emergency by one or more sensors distributed at respective locations in the building;   code for transmitting, by the server, over a communications medium, to a remote emergency service, an alert of the detected emergency, in response to the detection of the emergency;   code for receiving, by the server, over a communications medium, from the remote emergency service, an authorized login to temporarily transfer to the remote emergency service control of a building automation system of the building to respond to the detected emergency;   code for causing, by the server via a communications medium, transmission of a command from the remote emergency service directed to one or more devices in the building automation system, wherein the command, when received by the one or more devices, modifies operation of the one or more devices;   code for causing, by the server via a communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service; and   code for disabling, by the server, the temporary transfer of control to the remote emergency service of the building automation system, after the detected emergency has been resolved.       

     In accordance with an embodiment described herein, the computer program product further comprises:
         code for transmitting, by the server, over an internet communications medium, data specifying a depiction of a floor plan of the building displaying a current location of the emergency in the building in response to the receipt of the authorized login; and   code for transmitting, by the server, over the internet communications medium, a representation of controls for controlling the one or more devices in the building automation system, the controls associated with the command directed to the one or more devices in the building automation system, the controls representing the one or more devices to enable the remote emergency service to activate the controls and transmit the command to control the one or more devices.       

     In accordance with an embodiment described herein, the computer program product further comprises:
         wherein the depiction of the floor plan of the building displays operational states of the one or more devices managed by the building automation system for display to the remote emergency service.       

     In accordance with an embodiment described herein, the computer program product further comprises:
         wherein the controls include an internet address of the server, the method further comprising:   code for receiving, by the server, over the internet communications medium, from the remote emergency service, the command directed to the one or more devices in the building automation system; and   code for issuing, by the server, the command directed to the one or more devices, via the building automation system.       

     In accordance with an embodiment described herein, the computer program product further comprises:
         wherein the controls include an internet address of the building automation system, the method further comprising:   code for causing, by the server via the internet communications medium, transmission by the emergency service of the command directed to the one or more devices, to the building automation system specified in the controls, in response to the transmission of the alert and the receipt of the authorized login;   code for causing, by the server via the internet communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service to the building automation system, in response to the causing of the remote emergency service to transmit the command to the building automation system.       

     In accordance with an embodiment described herein, the computer program product further comprises:
         wherein the controls include an internet address to access a router, the method further comprising:   code for causing, by the server via the internet communications medium, transmission by the remote emergency service of the command directed to the one or more devices, to the router accessible by the controls, in response to the transmission of the alert and the receipt of the authorized login;   code for causing, by the server via the internet communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service to the router, in response to the causing of the remote emergency service to transmit the command to the router.       

     In accordance with an embodiment described herein, the computer program product further comprises:
         wherein the controls for controlling the one or more devices in the building automation system specify internet addresses for at least one of sprinkler control devices, door-lock control devices, gas valve control devices, emergency lock control devices, lighting control devices, public-address system control devices, or heating-ventilation-air-conditioning system control devices.       

     In accordance with an embodiment described herein, a method comprises:
         determining, by a server, an emergency in a building, based on detection of the emergency by one or more sensors distributed at respective locations in the building;   transmitting, by the server, over a communications medium, to a remote emergency service, an alert of the detected emergency, in response to the detection of the emergency;   receiving, by the server, over a communications medium, from the remote emergency service, an authorized login to temporarily transfer to the remote emergency service control of a building automation system of the building to respond to the detected emergency;   causing, by the server via a communications medium, transmission of a command from the remote emergency service directed to one or more devices in the building automation system, wherein the command, when received by the one or more devices, modifies operation of the one or more devices;   causing, by the server via a communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service; and   disabling, by the server, the temporary transfer of control to the remote emergency service of the building automation system, after the detected emergency has been resolved.       

     In accordance with an embodiment described herein, the method further comprises:
         transmitting, by the server, over an internet communications medium, data specifying a depiction of a floor plan of the building displaying a current location of the emergency in the building in response to the receipt of the authorized login; and   transmitting, by the server, over the internet communications medium, a representation of controls for controlling the one or more devices in the building automation system, the controls associated with the command directed to the one or more devices in the building automation system, the controls representing the one or more devices to enable the remote emergency service to activate the controls and transmit the command to control the one or more devices.       

     In accordance with an embodiment described herein, the method further comprises:
         wherein the depiction of the floor plan of the building displays operational states of the one or more devices managed by the building automation system for display to the remote emergency service.       

     In accordance with an embodiment described herein, the method further comprises:
         wherein the controls include an internet address of the server, the method further comprising:   receiving, by the server, over the internet communications medium, from the remote emergency service, the command directed to the one or more devices in the building automation system; and   issuing, by the server, the command directed to the one or more devices, via the building automation system.       

     In accordance with an embodiment described herein, the method further comprises:
         wherein the controls include an internet address of the building automation system, the method further comprising:   causing, by the server via the internet communications medium, transmission by the emergency service of the command directed to the one or more devices, to the building automation system specified in the controls, in response to the transmission of the alert and the receipt of the authorized login;   causing, by the server via the internet communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service to the building automation system, in response to the causing of the remote emergency service to transmit the command to the building automation system;   causing, by the server via the internet communications medium, transmission by the remote emergency service of the command directed to the one or more devices, to the router accessible by the controls, in response to the transmission of the alert and the receipt of the authorized login; and   causing, by the server via the internet communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service to the router, in response to the causing of the remote emergency service to transmit the command to the router.       

     In accordance with an embodiment described herein, the server further comprises:
         wherein the depiction of the floor plan of the building for display to the remote emergency service is different than a depiction of the floor plan of the building seen by operators at the building automation system.       

     The resulting method, apparatus, system, and computer program product integrates emergency detection systems into building automation systems to provide emergency response solutions to a remote emergency service by temporarily transferring control of the building control system to the remote emergency service so that building plans can be viewed and building equipment can be directly controlled by the remote emergency service. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A more detailed description of the disclosure, briefly summarized above, may be had by reference to various embodiments, some of which are illustrated in the appended drawings. While the appended drawings illustrate select embodiments of this disclosure, these drawings are not to be considered limiting of its scope, for the disclosure may admit to other equally effective embodiments. 
         FIG. 1  is an example network and functional block diagram of an emergency response handover system integrated into a building automation system, which temporarily transfers control of the building control system to an authorized remote emergency service to respond to a detected emergency, according to an embodiment of the disclosure. 
         FIG. 2A  is a more detailed example network and functional block diagram of the emergency response handover system integrated into the building automation system of  FIG. 1 , illustrating the emergency response handover system directly receiving from the remote emergency service a command directed to one or more devices in the building automation system, and issuing the command to the devices, according to an embodiment of the disclosure. 
         FIG. 2B  is a more detailed example network and functional block diagram of the emergency response handover system integrated into the building automation system of  FIG. 1 , illustrating causing transmission to the building automation system by the emergency service, of the command directed to the one or more devices, and causing, receipt of the command by the one or more devices from the building automation system, according to an embodiment of the disclosure. 
         FIG. 2C  is a more detailed example network and functional block diagram of the emergency response handover system integrated into the building automation system of  FIG. 1 , illustrating causing transmission to the one or more devices by the remote emergency service, of the command directed to the one or more devices, according to an embodiment of the disclosure. 
         FIG. 2D  is a more detailed example network and functional block diagram of the emergency response handover system integrated into the building automation system of  FIG. 1 , illustrating the emergency response handover system directly receiving from the remote emergency service a command directed to one or more devices in the building automation system, as in  FIG. 2A , the emergency response handover system transferring the command to the building automation system, the building automation system transferring the command to a router, the router transmitting the command to the one or more devices, according to an embodiment of the disclosure. 
         FIG. 3  is an example depiction of the floor plan of the building in a web page document received from the emergency response handover system, displayed on a browser of the remote emergency service, displaying hyperlink control links to send commands to the one or more devices managed by the building automation system, according to an embodiment of the disclosure. 
         FIG. 4  is an example flow diagram of a method performed by the example emergency response handover system of  FIG. 1 , according to an embodiment of the disclosure. 
     
    
    
     Identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. However, elements disclosed in one embodiment may be beneficially utilized on other embodiments without specific recitation. 
     DETAILED DESCRIPTION 
     What is needed is a way to integrate emergency detection systems into building automation systems to provide emergency response solutions to emergency responders or remote emergency services by temporarily transferring control of the building control system to them so that building plans can be viewed and building equipment can be directly controlled by the emergency responders or remote emergency services. 
       FIG. 1  is an example network and functional block diagram of an emergency response handover system  160  integrated into a building automation system  150  of a building, such as an office building, a school building, a theater, or the like. The emergency response handover system  160  may be computer program code residing in at least one memory  132 , which when executed by operation of at least one processor in the emergency server  130 , carries out the operations of the emergency response handover system  160 . In another embodiment, the emergency response handover system  160  may be logic blocks implemented by computer hardware logic  162  in the emergency server  130 , which may carry out the functions specified by the logic blocks. The emergency server  130  may reside in the same building as the building automation system  150  or it may be a cloud server accessed over a communications medium. 
     In the embodiment of  FIG. 1 , the emergency server  130  is connected by wired or wireless links to sensors, such as gunshot sensors  120 , fire sensors  122 , and emergency sensors  124 . The emergency sensors  124  may include explosion sensors, hazardous materials release sensors, natural gas leak sensors, smoke sensors, plumbing failure or flooding sensors, power failure sensors, elevator failure sensors, and the like. The emergency response handover system  160  in the emergency server  130  determines that an emergency has occurred in the building, based on detection of the emergency by one or more of the sensors  120 ,  122 , and  124  distributed at respective locations in the building. 
     In response to the detection of the emergency, the emergency response handover system  160  transmits an alert  140  of the detected emergency, over a communications medium, such as the internet or a public safety radio band, to a remote emergency service  170 . Example remote emergency services  170  include law enforcement, firefighting, hazardous materials response, emergency medical services, technical rescue, and security services. 
     In response to the transmission of the alert  140 , the emergency response handover system  160  receives over a communications medium, such as the internet, from the remote emergency service  170 , an authorized login  145  to temporarily transfer to the remote emergency service  170 , control of the building automation system  150  of the building, to respond to the detected emergency. Authorization of the remote emergency service  170  may have been previously arranged by the management authority of the building. 
     In response to the receipt of the authorized login  145 , the emergency response handover system  160  transmits over a communications medium, such as the internet, to the remote emergency service  170 , a depiction of a floor plan  190  of the building displaying a current location of the emergency in the building. In an example embodiment, the depiction may be a web page document that depicts the floor plan  190  of the building, displaying a current location of the emergency, as shown in  FIG. 3 . Since the location of the emergency may be moving within the building, consecutive web page documents may be transmitted with consecutive depictions of the floor plan  190  to dynamically present changes in the location and extent of the emergency. The web page document depicting of the floor plan  190  of the building, may display information and associated operational states of the one or more devices  151 - 154  managed by the building automation system  150 , for display to the remote emergency service  170 . In embodiments, the depiction of the floor plan  190  of the building, for display to the remote emergency service  170 , may be different than a depiction of the floor plan of the building seen by operators at the building automation system  150 . Example devices  151 - 154  managed by the building automation system  150  may include sprinkler control devices, door-lock control devices, gas valve control devices, emergency lock control devices, lighting control devices, public-address system control devices, and heating-ventilation-air-conditioning system control devices. 
     In response to the receipt of the authorized login  145 , the emergency response handover system  160  transmits to the remote emergency service  170  over the internet communications medium, a representation of controls  192  for controlling the one or more devices  151 - 154  in the building automation system  150 . The controls  192  are associated with a command  193  directed to the one or more devices  151 - 154  in the building automation system  150 . The remote emergency service  170  may activate the controls  192  and transmit the command  193  to control the one or more devices  151 - 154 . The hyperlink controls  192 , identified as C 1 , C 2 , . . . C 7 , may be icons  195  displayed in the browser  185  of the emergency service browser  185  ( FIG. 3 ), which may be selected to activate the corresponding command  193 . In response, the one or more devices  151 - 154  may reply to the remote emergency service  170  with an acknowledgement that the command has been received. The one or more devices  151 - 154  may also transmit to the remote emergency service  170  a status of the device as to whether the command has been executed and/or a status of the device after the command has been executed. The status of the device may be displayed in a window  197  in the browser  185  of the remote service  170  ( FIG. 3 ). In an example embodiment, the controls  192  are control links or hyperlinks that may be unique web addresses, such as https://www.ERH.com/Door-Lock-Controls?Front-Door=Unlock. This example unique web address is a Uniform Resource Locator (URL) that includes the internet address of the emergency response handover system  160  (abbreviated “ERH.com”), the path to the “door lock controls” device  151 , and parameters including a key part “?Front-Door”, and the command value  193  “=Unlock”, specifying a specific command to unlock the front door of the building. 
     In an example embodiment, the controls  192  are control links that may have an alternate form, for example a POST request method supported by HTTP, which requests that a web server accepts the data enclosed in the body of the request message. An example is:
     POST https://www.BMS.com/device/{device_id}/command” DATA&lt;json&gt;,   For example:   POST https://www.BMS.com/device/E453F2282A2B213C123B23DF23EA34B34C/command   DATA {“type”:“set”,“param”:“light_level_percent”,“value”:75}   

     Another example POST request embodiment of the control links may be:
     POST https://www.BMS.com/zone/{ zone_id}/command   DATA &lt;json&gt;,   For example:   POST https://www.BMS.com/zone/FG45223C12F23A34C82A2B213C23EA34B78C/command   DATA { “type”:“set”,“param”:“temperature_celsius ”,“value”:24}   

     In response to the receipt of the authorized login  145 , the emergency response handover system  160  causes the remote emergency service  170  to transmit the command  193  directed to one or more of the devices  151 - 154  in the building automation system  150 . The command  193 , when received by the one or more devices  151 - 154 , modifies or alters operation of the one or more devices  151 - 154 . Continuing with the preceding example, the remote emergency service  170  activates the control  192  by selecting the URL that includes the internet address of the emergency response handover system  160  (abbreviated “ERH.com”), the path to the “door lock controls” device  151 , and the parameters specifying the specific command to unlock the front door of the building. The remote emergency service  170  transmits the URL over the internet to the emergency response handover system  160 . The emergency response handover system  160  then issues the command  193  to the door lock controls device  151 , by passing to the building automation system  150  the parameters specifying the specific command  193  to unlock the front door of the building. In response, the door lock controls device  151 , carries out the specific command to unlock the front door of the building. 
     In an example embodiment, the emergency sensors  120 ,  122 ,  124  may be attached to the building automation system  150 . In this embodiment, control has been transferred from the building automation system  150  to the remote service  170  and yet the sensors  120 ,  122 ,  124  may continuously provide updates  147  to the remote service  170  browser  185  ( FIG. 3 ) in order to keep the emergency service informed of current situations. The continuously provided updates  147  from the sensors  120 ,  122 ,  124  pass through the building automation system  150  and through the handover system  160 , and are transmitted to the remote service  170 , while also sending control commands  193 . 
       FIG. 2A  is a more detailed example network and functional block diagram of the emergency response handover system  160  integrated into the building automation system  150  of  FIG. 1 , illustrating the emergency response handover system  160  receiving from the remote emergency service  170  the command  193  directed to one or more devices  151 - 154  in the building automation system  150 . Then the emergency response handover system  160  issues the command  193  to the devices  151 - 154 , according to an embodiment of the disclosure. The embodiment of the emergency response handover system  160  in  FIG. 2A  may perform the functions in the following logic blocks: 
     [1] Determine an emergency in the building based on detection by sensors  120 ,  122 , and/or  124 . in the building. 
     [2] Transmit an alert  140  to a remote emergency service  170 . 
     [3] Receive from the remote emergency service  170 , an authorized login  145  to temporarily transfer control of the building automation system  150  to respond to the detected emergency. 
     [4] Transmit a web page map  190  of emergency in building. 
     [5] Transmit web page links  192  for controlling devices  151 - 154  in the building automation system  150 . 
     [6] Receive from the remote emergency service  170 , via Internet, a command  193  directed to devices  151 - 154  in the building automation system  150 . 
     [7] Issue at  322  the command  193  to the building automation system  150 , which transfers the command at  324  to the devices  151 - 154  via bacnet, ethernet, zigbee, modbus, or other protocols. 
     [8] Disable  194  the temporary transfer of control after the detected emergency has been resolved. 
     The example hyperlink control links  192  sent by the emergency response handover system  160  to the remote emergency service  170  in  FIG. 2A , for controlling the one or more devices  151 - 154  in the building automation system  150 , are shown in Table 1: 
     
       
         
           
               
             
               
                 TABLE 1 
               
             
            
               
                   
               
               
                 Example Hyperlink Control Links 192 
               
            
           
           
               
               
               
               
               
            
               
                 Control 
                 Destination 
                 BMS Control Device 
                 Path 
                 Command 193 
               
               
                   
               
               
                 C1 
                 ERH.com/ 
                 Sprinklers 
                 ?Meeting-room 
                 =Turn-Off 
               
               
                 C2 
                 ERH.com/ 
                 Door-Lock-Controls 
                 ?Front-Door 
                 =Unlock 
               
               
                 C3 
                 ERH.com/ 
                 Gas-Valves 
                 ?Main-Valve 
                 =Turn-Off 
               
               
                 C4 
                 ERH.com/ 
                 Emergency-Locks 
                 ?Control Room 
                 =Unlock 
               
               
                 C5 
                 ERH.com/ 
                 Lighting 
                 ?Main-Lighting 
                 =Turn-On 
               
               
                 C6 
                 ERH.com/ 
                 Public-Address 
                 ?Hallways 
                 =Turn-On 
               
               
                 C7 
                 ERH.com/ 
                 HVAC 
                 ?Fans 
                 =Turn-Off 
               
               
                   
               
            
           
         
       
     
       FIG. 3  is an example illustration of the browser  185  of the remote emergency service  170 , displaying an example depiction of the floor plan  190  of the building in the web page document received from the emergency response handover system  169 . The depiction of the floor plan  190  includes the hyperlink controls  192 , identified as C 1 , C 2 , . . . C 7 , for controlling the one or more devices  151 - 154  in the building automation system  150 . The depiction of the hyperlink controls  192 , identified as C 1 , C 2 , . . . C 7  may be as icons  195  displayed in the browser  185  of the emergency service browser  185 , which may be selected to activate the corresponding command  193 . The hyperlink controls  192  are associated with the command  193  directed to the one or more devices  151 - 154  in the building automation system  150 . The remote emergency service  170  may activate the hyperlink controls  192  displayed in the browser  185  and transmit the command  193  to control the one or more devices  151 - 154 . The example depiction of the floor plan  190  may also display operational states of the one or more devices  151 - 154  managed by the building automation system  150 , and the locations of the sensors  120 ,  122 , and  124 . 
     The emergency response handover system  160 , which has the destination internet address “ERH.com/”, receives from the remote emergency service  170  the command  193  for the one or more devices  151 - 154  in the building automation system  150 . The emergency response handover system  160  issues the command to the devices  151 - 154 . 
     The remote emergency service  170  may activate the controls  192  and transmit the command  193  to control the one or more devices  151 - 154 . In response, the one or more devices  151 - 154  may reply to the remote emergency service  170  with an acknowledgement that the command has been received. The one or more devices  151 - 154  may also transmit to the remote emergency service  170  a status of the device as to whether the command has been executed and/or a status of the device after the command has been executed. The status of the device may be displayed in a window  197  on the browser  185  of the remote service  170 . 
     After the detected emergency has been resolved, the emergency response handover system  160  disables the temporary transfer of control to the remote emergency service  170  of the building automation system  150 . 
       FIG. 2B  is a more detailed example network and functional block diagram of the emergency response handover system  160  integrated into the building automation system  150  of  FIG. 1 , illustrating the building automation system  150  directly receiving from the remote emergency service  170 , a command  193  directed to one or more devices  151 - 154  in the building automation system  150 . The building automation system  150  issues the command to the devices  151 - 154 , according to an embodiment of the disclosure. The embodiment of the emergency response handover system  160  in  FIG. 2B  may perform the functions in the following logic blocks: 
     [1] Determine an emergency in the building based on detection by sensors  120 ,  122 , and/or  124 . in the building. 
     [2] Transmit an alert  140  to a remote emergency service  170 . 
     [3] Receive from the remote emergency service  170 , an authorized login  145  to temporarily transfer control of the building automation system  150  to respond to the detected emergency. 
     [4] Transmit a web page map  190  of emergency in building. 
     [5] Transmit web page links  192  for controlling devices  151 - 154  in the building automation system  150 . 
     [6] Cause the remote emergency service  170  to send a command  193  directly, via Internet, to the building automation system  150 , directed to devices. 
     [7] Cause the building automation system  150  to issue the command  193  at  324  to the devices via bacnet, ethernet, zigbee, modbus, or other protocols. 
     [8] Disable  194  the temporary transfer of control after the detected emergency has been resolved. 
     The example hyperlink control links  192  sent by the emergency response handover system  160  to the remote emergency service  170  in  FIG. 2B , for controlling the one or more devices  151 - 154  in the building automation system  150 , are shown in Table 2: 
     
       
         
           
               
             
               
                 TABLE 2 
               
             
            
               
                   
               
               
                 Example Hyperlink Control Links 192 
               
            
           
           
               
               
               
               
               
            
               
                 Control 
                 Destination 
                 BMS Control Device 
                 Path 
                 Command 193 
               
               
                   
               
               
                 C1 
                 BMS.com/ 
                 Sprinklers 
                 ?Meeting-room 
                 =Turn-Off 
               
               
                 C2 
                 BMS.com/ 
                 Door-Lock-Controls 
                 ?Front-Door 
                 =Unlock 
               
               
                 C3 
                 BMS.com/ 
                 Gas-Valves 
                 ?Main-Valve 
                 =Turn-Off 
               
               
                 C4 
                 BMS.com/ 
                 Emergency-Locks 
                 ?Control Room 
                 =Unlock 
               
               
                 C5 
                 BMS.com/ 
                 Lighting 
                 ?Main-Lighting 
                 =Turn-On 
               
               
                 C6 
                 BMS.com/ 
                 Public-Address 
                 ?Hallways 
                 =Turn-On 
               
               
                 C7 
                 BMS.com/ 
                 HVAC 
                 ?Fans 
                 =Turn-Off 
               
               
                   
               
            
           
         
       
     
     The building automation system  150 , which has the destination internet address “BMS.com/”, receives from the remote emergency service  170  the command  193  for the one or more devices  151 - 154  in the building automation system  150 . The building automation system  150  issues the command  193  to the devices  151 - 154 . 
       FIG. 2C  is a more detailed example network and functional block diagram of the emergency response handover system  160  integrated into the building automation system  150  of  FIG. 1 , illustrating the emergency response handover system  160  causing transmission of the command  193  by the remote emergency service  170  directly to the one or more devices  151 - 154 , as specified in the controls  192 , via a router  330 . When the command  193  is received by the one or more devices  151 - 154 , they execute the command. The embodiment of the emergency response handover system  160  in  FIG. 2C  may perform the functions in the following logic blocks: 
     [1] Determine an emergency in the building based on detection by sensors  120 ,  122 , and/or  124 . in the building. 
     [2] Transmit an alert  140  to a remote emergency service  170 . 
     [3] Receive from the remote emergency service  170 , an authorized login  145  to temporarily transfer control of the building automation system  150  to respond to the detected emergency. 
     [4] Transmit a web page map  190  of emergency in building. 
     [5] Transmit web page links  192  for controlling devices  151 - 154  in the building automation system  150 . 
     [6] Cause the remote emergency service to send a command via Internet to the router, directed to devices in the building automation system. 
     [7] Cause the router to forward the command to the devices in the building automation system. 
     [8] Disable  194  the temporary transfer of control after the detected emergency has been resolved. 
     The example hyperlink control links  192  are sent by the emergency response handover system  160  to the remote emergency service  170  in  FIG. 2C , for controlling the one or more devices  151 - 154  in the building automation system  150 , are shown in Table 3: 
     
       
         
           
               
             
               
                 TABLE 3 
               
             
            
               
                   
               
               
                 Example Hyperlink Control Links 192 
               
            
           
           
               
               
               
               
            
               
                 Control 
                 Destination 
                 Path 
                 Command 193 
               
               
                   
               
               
                 C1 
                 Sprinklers.com/ 
                 ?Meeting-room 
                 =Turn-Off 
               
               
                 C2 
                 Door-Lock-Controls.com/ 
                 ?Front-Door 
                 =Unlock 
               
               
                 C3 
                 Gas-Valves.com/ 
                 ?Main-Valve 
                 =Turn-Off 
               
               
                 C4 
                 Emergency-Locks.com/ 
                 ?Control Room 
                 =Unlock 
               
               
                 C5 
                 Lighting.com/ 
                 ?Main-Lighting 
                 =Turn-On 
               
               
                 C6 
                 Public-Address.com/ 
                 ?Hallways 
                 =Turn-On 
               
               
                 C7 
                 HVAC.com/ 
                 ?Fans 
                 =Turn-Off 
               
               
                   
               
            
           
         
       
     
     The individual one of the one or more devices  151 - 154 , which has the respective destination internet address, such as “Sprinklers.com/”, etc., receives from the remote emergency service  170  the command  193  for the respective one of the devices  151 - 154  in the building automation system  150 , and the respective one of the devices  151 - 154  executes the command, 
       FIG. 2D  is a more detailed example network and functional block diagram of the emergency response handover system integrated into the building automation system of  FIG. 1 , illustrating the emergency response handover system  160  directly receiving from the remote emergency service  170  a command  193  directed to one or more devices  151 ,  152 ,  153 , and/or  154  in the building automation system, as in  FIG. 2A , the emergency response handover system  160  transferring the command to the building automation system  150 , the building automation system  150  transferring the command to a router  155 , the router  155  transmitting the command to the one or more devices  151 ,  152 ,  153 , and/or  154 , according to an embodiment of the disclosure. 
       FIG. 4  is an example flow diagram  400  of a method performed by the emergency response handover system  160  in the emergency server  130  of  FIG. 1 , according to an embodiment of the disclosure. The logic blocks of the flow diagram  400  may be implemented by computer program instructions stored in the memory  132  and executed by the processor in the emergency server  130  of  FIG. 1 . Alternately, the logic blocks of the flow diagram  400  may also be implemented by computer hardware logic  162  in the emergency server  130  of  FIG. 1 , which can carry out the functions specified by the logic blocks. 
     The method performed by the example central controller  100  for minimizing crosstalk, comprises the following logic blocks: 
     Block  402 : determining, by a server, an emergency in a building, based on detection of the emergency by one or more sensors distributed at respective locations in the building; 
     Block  404 : transmitting, by the server, over a communications medium, to a remote emergency service, an alert of the detected emergency, in response to the detection of the emergency; 
     Block  406 : receiving, by the server, over a communications medium, from the remote emergency service, an authorized login to temporarily transfer to the remote emergency service control of a building automation system of the building to respond to the detected emergency; 
     Block  408 : causing, by the server via a communications medium, transmission of a command from the remote emergency service directed to one or more devices in the building automation system, wherein the command, when received by the one or more devices, modifies operation of the one or more devices; 
     Block  410 : causing, by the server via a communications medium, receipt of the command by the one or more devices in the building automation system, which was sent by the remote emergency service; and 
     Block  412 : disabling, by the server, the temporary transfer of control to the remote emergency service of the building automation system, after the detected emergency has been resolved. 
     Current building automation emergency response control handoff systems are not designed to temporarily transfer to a remote emergency service, control of the building automation system in response to detecting an emergency by one or more building sensors. This is a technical problem. In an exemplary embodiment of a building automation response control handoff system, a processor is instructed to determine an emergency based on detection of the emergency by building sensors, transmit an alert of the emergency to a remote emergency service, and receive an authorized login to temporarily transfer control of the building automation system to the remote service. The processor may be instructed to transmit a command from the remote service to devices in the building automation system, wherein the command modifies operation of the devices when received by them. The processor may disable the temporary transfer of control to the remote service after the detected emergency has been resolved. At least this foregoing combination of features comprises a building automation emergency response control handoff system that serves as a technical solution to the foregoing technical problem. This technical solution is not routine and is unconventional. This technical solution is a practical application of a building automation emergency response control handoff system that solves the foregoing technical problem and constitutes an improvement in the technical field of building-automation-system design, at least by facilitating temporary transfer to a remote emergency service control of the building automation system in response to detecting an emergency by one or more building sensors. 
     In the preceding, reference is made to various embodiments. However, the scope of the present disclosure is not limited to the specific described embodiments. Instead, any combination of the described features and elements, whether related to different embodiments or not, is contemplated to implement and practice contemplated embodiments. Furthermore, although embodiments may achieve advantages over other possible solutions or over the prior art, whether or not a particular advantage is achieved by a given embodiment is not limiting of the scope of the present disclosure. Thus, the preceding aspects, features, embodiments and advantages are merely illustrative and are not considered elements or limitations of the appended claims except where explicitly recited in a claim(s). 
     The various embodiments disclosed herein may be implemented as a system, method or computer program product. Accordingly, aspects may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “component”, “circuit,” “module” or “system.” Furthermore, aspects may take the form of a computer program product embodied in one or more computer-readable medium(s) having computer-readable program code embodied thereon. 
     Any combination of one or more computer-readable medium(s) may be utilized. The computer-readable medium may be a non-transitory computer-readable medium. A non-transitory computer-readable medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the non-transitory computer-readable medium can include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. Program code embodied on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing. 
     Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages. Moreover, such computer program code can execute using a single computer system or by multiple computer systems communicating with one another (e.g., using a local area network (LAN), wide area network (WAN), the Internet, etc.). While various features in the preceding are described with reference to flowchart illustrations and/or block diagrams, a person of ordinary skill in the art will understand that each block of the flowchart illustrations and/or block diagrams, as well as combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer logic (e.g., computer program instructions, hardware logic, a combination of the two, etc.). Generally, computer program instructions may be provided to a processor(s) of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus. Moreover, the execution of such computer program instructions using the processor(s) produces a machine that can carry out a function(s) or act(s) specified in the flowchart and/or block diagram block or blocks. 
     The flowchart and block diagrams in the Figures illustrate the architecture, functionality and/or operation of possible implementations of various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. 
     It is to be understood that the above description is intended to be illustrative, and not restrictive. Many other implementation examples are apparent upon reading and understanding the above description. Although the disclosure describes specific examples, it is recognized that the systems and methods of the disclosure are not limited to the examples described herein but may be practiced with modifications within the scope of the appended claims. Accordingly, the specification and drawings are to be regarded in an illustrative sense rather than a restrictive sense. The scope of the disclosure should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.