Abstract:
A method for determining the privacy settings for location-based services without some of the disadvantages of the prior art is disclosed. This is done by establishing a session between the location generator and the location recipient. The session is created by a validator that is capable of keeping track of the rules for a stream of location objects created by a location generator. The validator determines what information to send to the location recipient without having to determine the rules for each location object and each location recipient every time a new location object is received by the location server.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of U.S. Provisional Application No. 61/138,439, filed Dec. 17, 2008, which is incorporated by reference. 
     This application is related to U.S. patent application Ser. No. 12/484,083, filed Jun. 12, 2009, entitled “Spatial-Temporal Event Correlation For Location-Based Services,” which is incorporated by reference. 
     If there are any contradictions or inconsistencies in language between this application and the cases that have been incorporated by reference that might affect the interpretation of the claims in this case, the claims in this case should be interpreted to be consistent with the language in this case. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to telecommunications in general, and, more particularly, to location-based services. 
     BACKGROUND OF THE INVENTION 
     Location-based services are services provided based on the location of objects. The most prevalent location-based service is Enhanced 911 (or E911) services. The Enhanced 911 service provides 911 operators and emergency responders with information such as the identification of the person calling and the location of the caller. All mobile telephones sold in the United States today have this feature. 
     Location-based services include, for example and without limitation, satellite navigation devices that let a user know the location of the closest hospital or gas station to a user. Location-based services may also alert enterprises, such as gas stations, as to when a potential customer is within a certain distance. The enterprise may then send targeted advertisements to a traveler, such as discounts, etc. 
     Still other location-based services are targeted to the tracking of objects, such as, for example and without limitation, tracking of packages, tracking a fleet of vehicles, or determining the number of people who are in a given area for allotting government services where they may be most needed. 
     The problem is how to protect users&#39; privacy as they use location-based services. 
     Protecting user privacy is done by a user creating a series of rules for access to the user&#39;s information. These rules set privacy settings based on, for example and without limitation, the recipient of the user&#39;s information, where the user may be located, the time, etc. 
     In the prior art, the privacy settings are maintained in a location-based privacy system such as the one in  FIG. 3 . In  FIG. 2 , object  201 - 1  (here a person) travels along path  202 - 1  through space  101 - 4 , space  101 - 5 , and space  101 - 3 . As user  201 - 1  travels along this path, user  201 - 1  sends out “location objects” which indicate where the user is located. In accordance with the illustrative embodiment of the present invention, user  201 - 1  does this by the use of location generator  301 , and user  201 - 1  has defined different location-based service privacy settings for each space. 
     Because of the different privacy settings, location-based privacy system  300  checks the rules for each location object to determine whether or not a given location recipient should receive each location object. Location server  302  checks with rule maker  304  to determine whether or not it should send the location object to location recipient  303 . 
     SUMMARY OF THE INVENTION 
     The present invention provides a method determining the privacy settings for location-based services without some of the disadvantages of the prior art. This is done by establishing a session between the location generator and the location recipient. 
     The session is created by a validator that is capable of keeping track of the rules for a stream of location objects created by a location generator. The validator determines what information to send to the location recipient without having to determine the rules for each location object and each location recipient every time a new location object is received by the location server. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  depicts an illustrative map in accordance with the illustrative embodiment of the present invention. 
         FIG. 2  depicts an illustrative map in accordance with the illustrative embodiment of the present invention. 
         FIG. 3  depicts a schematic diagram of the salient components of location-based services privacy system  300  in accordance with the prior art. 
         FIG. 4  depicts a schematic diagram of the salient components of location-based services privacy system  400  in accordance with the illustrative embodiment of the present invention. 
         FIG. 5  depicts a schematic diagram of the salient components of location-based services privacy system  400  in accordance with the illustrative embodiment of the present invention. 
         FIG. 6  depicts a flowchart of the salient tasks associated with the operation of the illustrative embodiment of the present invention. 
         FIG. 7  depicts a flowchart of the salient tasks associated with the operation of task  604  in accordance with the illustrative embodiment of the present invention. 
         FIG. 8  depicts a flowchart of the salient tasks associated with the operation of task  605  in accordance with the illustrative embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  depicts illustrative map  100  in accordance with the illustrative embodiment of the present invention. 
     Map  100  is a rectangular area in which we are interested for the purposes of the illustrative embodiment of the present invention. Map  100  comprises areas  101 - 1  through  101 - 6 . 
     Although, in accordance with the illustrative embodiment of the present invention, map  100  represents some physical space, it will be clear to one skilled in the art after reading this disclosure, how to make and use alternative embodiments of the present invention in the space is not a physical space, for example and without limitation, the space is instead a virtual space. 
     Although, in accordance with the illustrative embodiment of the present invention, map  100  represents space in two dimensions (2-D), it will be clear to one skilled in the art after reading this disclosure, how to make and use alternative embodiments of the present invention in the space is not a two dimensional (2-D) space but instead the space is any number of dimensions, for example and without limitation, three dimensions (3-D), four dimensions (4-D), etc. 
     Although map  100  is a rectangular area, it will be clear to one skilled in the art after reading this disclosure, how to make and use alternative embodiments of the present invention in which map  100  is any shape or any size. 
     Although areas  101 - 1  through  101 - 6  are a rectangular areas, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which areas  101 - 1  through  101 - 6  are any shape or any size. 
     Although areas  101 - 1  and  101 - 4  overlap, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which areas  101 - 1  and  101 - 4  do not overlap, overlap completely, or overlap with other areas. 
     Although areas  101 - 2  and  101 - 4  overlap, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which areas  101 - 2  and  101 - 4  do not overlap, overlap completely, or overlap with other areas. It will also be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention 
       FIG. 2  depicts map  100  in accordance with the illustrative embodiment of the present invention. Map  100  comprises areas  101 - 1  through  101 - 6 , object  201 - 1 , and path  202 - 1 . 
     Although  FIG. 2  depicts one object, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of objects. 
     Although  FIG. 2  depicts one path, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of paths. 
     Although object  201 - 1  is depicted as a person, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which object  201 - 1  can be any object, for example, and without limitation: a person, a sensor, a vehicle, an animal, a telecommunications terminal, a stationary object, etc. 
     Although path  202 - 1  is depicted as going through areas  101 - 4 ,  101 - 5 , and  101 - 3  of the map, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which path  202 - 1  can travel through any area of map  100 . 
     Although object  201 - 1  is depicted as traveling along path  202 - 1 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which object  201 - 1  can travel along any path and through any area of map  100 . 
     In accordance with the illustrative embodiment of the present invention, object  201 - 1  travels along path  202 - 1  through areas  101 - 4 ,  101 - 5 , and  101 - 3  of map  100 . As it travels along this path, the location object  201 - 1  is noted and tracked. In accordance with the illustrative embodiment of the present invention, the location is noted by satellite trilateralization, such as, for example, and without limitation, global positioning system (GPS). Other techniques for determining location include, for example and without limitation, triangulation of endpoints in cellular or wireless networks, proximal device broadcast, purchasing transactions (such as those by credit card or debit card), vehicle-to-vehicle networks, radio signals, etc. In accordance with the illustrative embodiment of the present invention, the location is then tracked by sending periodic updates through a wireless network, such as, for example and without limitation, a mobile telephone or data network, a packet radio network, a IEEE 802.11 (Wi-Fi) network, etc. 
       FIG. 3  depicts a schematic diagram of the salient components of location-based services privacy system  300  in accordance with the prior art.  FIG. 3  comprises location generator  301 , location server  302 , location recipient  303 , and rule maker  304 . 
       FIG. 4  depicts a schematic diagram of the salient components of location-based services privacy system  400  in accordance with the illustrative embodiment of the present invention.  FIG. 4  comprises location generator  301 , location server  302 , location recipient  303 , rule maker  304 , and validator  401 . 
     For the purpose of this specification, a “location generator” is defined as any device (hardware and/or software) or event that provides an indication of its location. Examples of location generators include, for example and without limitation, global positioning system (GPS) receiver units, including those in mobile telecommunications terminals, triangulation of endpoints in cellular or wireless networks, purchasing transactions (such as those by credit card or debit card), vehicle-to-vehicle networks, radio signals, etc. 
     For the purpose of this specification, a “location recipient” is defined as any device (hardware and/or software) or person that receives the location information of a location generator. Examples of location recipients include, for example and without limitation, emergency service providers who use location information to locate people in need, a device used by a parent to track his or her child, providers of a location-based services, etc. 
     For the purpose of this specification, “location information” is defined as information regarding the location of a location generator. This includes, for example and without limitation, a location object, a subset of the information in a location object, the exact coordinates of a location generator, the name of a place of where a location generator is located, a street address, etc. 
     Although in accordance with the illustrative embodiment of the present invention,  FIG. 4  comprises one location generator, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of location generators. 
     Although in accordance with the illustrative embodiment of the present invention  FIG. 4  comprises one location server, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of location servers. 
     Although in accordance with the illustrative embodiment of the present invention,  FIG. 4  comprises one rule maker, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of rule makers. 
     Although in accordance with the illustrative embodiment of the present invention,  FIG. 4  comprises one location recipient, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of location recipients. 
     Although in accordance with the illustrative embodiment of the present invention,  FIG. 4  comprises one validator, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of validators. 
     Although in accordance with the illustrative embodiment of the present invention, validator  401  is inside of location server  302 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which validator  401  is located elsewhere, for example and without limitation, between location server  302  and location recipient  303 , between location generator  301  and location server  302 , etc. 
     In accordance with the illustrative embodiment of the present invention, validator  401  is implemented by the means of an event processor. 
     For the purpose of this specification, an “event processor” is defined as hardware and software that performs event processing, event filtering, and event correlation. 
     In accordance with the illustrative embodiment of the present invention, event processing refers to operations performed by an information system, for example and without limitation, operations to receive, distribute, store, modify, generate, or discard events. In accordance with the illustrative embodiment of the present invention, event filtering is a type of event processing in which an event is forwarded or blocked to a recipient based on a property of the event or some other computational context. 
     In accordance with the illustrative embodiment of the present invention, event correlation is a type of event processing in which an event is evaluated primarily with respect to other events but also system state or context, in order to produce related events. These related events ideally have the characteristics that there is a reduction in the volume of events and/or the information content of the new events is transformed to a more relevant value. 
     It will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention, in which validator  401  is implemented by another means. 
       FIG. 5  depicts a schematic diagram of the salient components of location-based services privacy system  400  in accordance with the illustrative embodiment of the present invention.  FIG. 5  comprises location generator  301 , location server  302 , location recipient  303 , rule maker  304 , validator  401 , and session  501 . 
     Although in accordance with the illustrative embodiment of the present invention,  FIG. 5  comprises one session, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which there are any number of sessions. 
     Although in accordance with the illustrative embodiment of the present invention, session  501  is between location generator  301 , validator  401 , and location recipient  303 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which the session may comprise other components, for example and without limitation, rule maker  304 . 
     Although in accordance with the illustrative embodiment of the present invention, session  501  comprises one location generator, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which the session may comprise any number of location generators. 
     Although in accordance with the illustrative embodiment of the present invention, session  501  comprises one validator, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which the session may comprise any number of validators. 
     Although in accordance with the illustrative embodiment of the present invention, session  501  comprises one location recipient, it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which the session may comprise any number of location recipients. 
       FIG. 6  depicts a flowchart of the salient tasks associated with the operation of the illustrative embodiment of the present invention. 
     In accordance with the illustrative embodiment of the present invention, the tasks outlined in  FIG. 6  are performed at validator  501 . However, it will be clear to one skilled in the art, after reading this disclosure how to make and use other implementations of the present invention in which the some or all of the steps are performed by another device, for example, and without limitation, location generator  301 , rule maker  304 , a separate event processor, etc. 
     At task  601 , validator  501  receives a first request. Although, in accordance with the illustrative embodiment of the present invention, this is received from location recipient  303 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which the first request received from another source. 
     In accordance with the illustrative embodiment of the present invention, the validator  501  will receive an indicium of the location generator as part of this request. In accordance with the illustrative embodiment of the present invention, an indicium of the location generator is some indication of where the location generator may be located. These are, for example, and without limitation, the name of the object to be located, the X and Y coordinates at which the object is located, a name for the place where the object is located (such as “home,” “work,” “school,” etc.), a store where a purchase may have occurred, or any signal that may tell where the object is located. 
     At task  602 , validator  501  receives a first location object. Although, in accordance with the illustrative embodiment of the present invention, the first location object is received from location recipient  303 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which the first request received from another source. 
     At task  603 , validator  501  receives a first rule. Although, in accordance with the illustrative embodiment of the present invention, the first rule is received from rule maker  304 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which the first request received from another source. 
     At task  604 , validator  501  generates a first function. This is further detailed in  FIG. 7 . 
     At task  605 , validator  501  establishes a session between location object and location recipient. This step is further detailed in  FIG. 8 . 
     At task  606 , a session is terminated when the conditions of the function are no longer met. For example and without limitation, if the condition of the function is “Let my spouse know my exact location after 9 p.m. and before 8 a.m.,” and it is 8 a.m. the session between the location generator and the location recipient will be terminated. It will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention that perform task  606 . 
     It will be clear to one skilled in the art, after reading this disclosure, how to make and use other implementations of the present invention in which one or more of the steps are omitted or are performed in a different order than the one presented or simultaneously. 
       FIG. 7  depicts a flowchart of the salient tasks associated with the operation of task  604  in accordance with the illustrative embodiment of the present invention. 
     At task  701 , the rules of location generator are determined. In accordance with the illustrative embodiment of the present invention, this task is performed based on the rules received from rule maker  304 . In accordance with the illustrative embodiment of the present invention the location generator would have general rules relating to the dissemination of location information to other parties. For example and without limitation, a user of location generator  301  may want to prohibit the distribution of location objects to all parties (except for emergency services). 
     In accordance with the illustrative embodiment of the present invention, rules include, for example and without limitation, policies and settings that are set by the user, are default settings, or are set by some other party. These rules define the relationship between the components and parties. 
     At task  702 , rules of location recipient are determined. In accordance with the illustrative embodiment of the present invention, this task is performed based on the rules received from rule maker  304 . In accordance with the illustrative embodiment of the present invention, the location recipient would have general rules relating to the dissemination of location information to other parties. For example and without limitation, location recipient may be a large organization and only certain members of that group may be allowed access to location objects. 
     At task  703 , the relationship of between location generator and location recipient is determined. In accordance with the illustrative embodiment of the present invention, this task is performed based on the rules received from rule maker  304 . In accordance with the illustrative embodiment of the present invention, the location recipient would have general rules relating to the dissemination of location information to other parties based in particular on a relationship between the two parties. Examples of these relationship queries are, for example and without limitation, “Allow my friends know that I am within five miles of them,” or “Let my spouse know my exact location,” etc. 
     At task  704 , the relationship of between location generator and a user of the location recipient is determined. In accordance with the illustrative embodiment of the present invention, this task is performed based on the rules received from rule maker  304 . In accordance with the illustrative embodiment of the present invention, the location recipient would have general rules relating to the dissemination of location information to other parties based in particular on a relationship between the location generator and a user of the location recipient. Examples of these queries are, for example and without limitation, “Send my present location to the medical center, but only allow my physician to view my location,” “Allow my supervisor and my assistant to know my location, but do not allow anyone else at my job to see my location,” etc. 
     At task  705 , the rules and relationship between location generator and location recipient as product of time are determined. In accordance with the illustrative embodiment of the present invention, this task is performed based on the rules received from rule maker  304 . In accordance with the illustrative embodiment of the present invention, the location recipient would have general rules relating to the dissemination of location information to other parties based in particular on a relationship between the two parties as a product of time. Examples of these relationship queries are, for example and without limitation, “Allow my friends know my location during the weekend,” “Let my spouse know my exact location after 9 p.m. and before 8 a.m.,” “Allow my employer to know my location within 500 meters between the hours of 8:30 am and 5:30 pm.,” etc. 
     At task  706 , rules and relationship between location generator and location recipient as product of location is determined. In accordance with the illustrative embodiment of the present invention, this task is performed based on the rules received from rule maker  304 . In accordance with the illustrative embodiment of the present invention, the location recipient would have general rules relating to the dissemination of location information to other parties based in particular on a relationship between the two parties as a product of location. Examples of these relationship queries are, for example and without limitation, “Allow my friends know that I am within five miles of them,” “Let my spouse know my exact location unless I am in Atlantic City,” “Allow my employer to know whether or not I am at a work site,” etc. 
     At task  707 , the function based on determined rules and determined relationships is generated. It will be clear to one skilled in the art, after reading this disclosure that the generated function is capable of handling operations that are combinations of the above operations, for example and without limitation, “Send my location to the medical center, on Monday between 9 am and 5 pm, when I am in New Jersey, and only allow physician to view this information,” “Allow my spouse to view my location only when I am within 5 miles of my home Monday through Friday, but do not allow other members of my household to view this information,” etc. It will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which task  707  is performed. 
     In accordance with the illustrative embodiment of the present invention, the following examples, without limitation, are those in which rules of the present invention are enacted using Extensible Markup Language (XML). It will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which a different language is used. 
     The following example is one in which some hotels to are permitted access to the user&#39;s location when the user is at an airport, regardless of the airport&#39;s location. 
     
       
         
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 &lt;rule id=“NM32848”&gt; 
               
               
                   
                   &lt;conditions&gt; 
               
               
                   
                    &lt;identity&gt; 
               
               
                   
                      &lt;one domain=“hertz.com”/&gt; 
               
               
                   
                      &lt;one domain=“avis.com”/&gt; 
               
               
                   
                      &lt;one domain=“budget.com”/&gt; 
               
               
                   
                    &lt;/identity&gt; 
               
               
                   
                    &lt;gp:location-condition&gt; 
               
               
                   
                     &lt;gp:location profile=“rpid-condition”&gt; 
               
               
                   
                      &lt;rpid:place-type&gt; 
               
               
                   
                       &lt;lt:airport/&gt; 
               
               
                   
                      &lt;/rpid:place-type&gt; 
               
               
                   
                     &lt;/gp:location&gt; 
               
               
                   
                    &lt;/gp:location-condition&gt; 
               
               
                   
                   &lt;/conditions&gt; 
               
               
                   
                   &lt;transformations/&gt; 
               
               
                   
                  &lt;/rule&gt; 
               
               
                   
                 &lt;/ruleset&gt; 
               
               
                   
                   
               
             
          
         
       
     
     Example 1 
     Access to User Location at Airport 
     In the following example “sphere” is to allows user bob@example.net to access the user&#39;s location information. This rule keeps valid even if the user&#39;s home moves. 
     
       
         
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 &lt;rule id=“NM32848”&gt; 
               
               
                   
                   &lt;conditions&gt; 
               
               
                   
                    &lt;identity&gt; 
               
               
                   
                     &lt;many&gt; 
               
               
                   
                      &lt;except id=“sip:bob@example.net”/&gt; 
               
               
                   
                     &lt;/many&gt; 
               
               
                   
                    &lt;/identity&gt; 
               
               
                   
                    &lt;gp:location-condition&gt; 
               
               
                   
                     &lt;gp:location profile=“rpid-condition”&gt; 
               
               
                   
                      &lt;rpid:sphere&gt; 
               
               
                   
                       &lt;rpid:home/&gt; 
               
               
                   
                      &lt;/rpid:sphere&gt; 
               
               
                   
                     &lt;/gp:location&gt; 
               
               
                   
                    &lt;/gp:location-condition&gt; 
               
               
                   
                   &lt;/conditions&gt; 
               
               
                   
                   &lt;transformations/&gt; 
               
               
                   
                  &lt;/rule&gt; 
               
               
                   
                   
               
             
          
         
       
     
     Example 2 
     Granting Access to User&#39;s Location Based on “Sphere” 
     It will be clear to one skilled in the art, after reading this disclosure, how to make and use other implementations of the present invention in which one or more of the steps are omitted or are performed in a different order than the one presented or simultaneously. 
       FIG. 8  depicts a flowchart of the salient tasks associated with the operation of task  605  in accordance with the illustrative embodiment of the present invention. In accordance with the illustrative embodiment of the present invention, task  801  through task  806  are performed by the function at validator  401 . It will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention in which task  801  through task  806  are performed elsewhere. 
     Although, in accordance with the illustrative embodiment of the present invention,  FIG. 8  depicts four tests to determine permissions between location generator  301  and location recipient  303 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention, in which any number of tests are performed. 
     At task  801 , the function determines whether the location recipient has any permission to access the location object. If it does have permission, the decision process proceeds to task  802 . If it does not, it proceeds to task  805 . 
     At task  802 , the function determines whether the location recipient has permission to access location object given the current or other location of the location generator. If it does have permission, the decision process proceeds to task  803 . If it does not, it proceeds to task  805 . 
     At task  803 , the function determines whether the location recipient has permission to access the location object at current or other time. If it does have permission, the decision process proceeds to task  804 . If it does not, it proceeds to task  805 . 
     At task  804 , the function determine the appropriate resolution that location recipient may access location object. In accordance with the illustrative embodiment of the present invention, different location recipients have different permissions regarding the exactness of the location of the location generator. For example, and without limitation, a location generator may give permissions such as, “Allow my friends know that I am within five miles of them, but do not inform them of my location” “Let my spouse know my exact location,” or “Allow my employer to know that I am in New Jersey, but do not give my employer my exact location,” etc. 
     At task  805 , a session is NOT established. Although in accordance with the illustrative embodiment of the present invention, after task  805 , the system returns to step  801 , it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention where the system proceeds to another point, for example and without limitation, the system proceeds to the end point. 
     At task  806 , a session is established. it will be clear to one skilled in the art, after reading this disclosure, how to make and use alternative embodiments of the present invention that perform task  806 . 
     It will be clear to one skilled in the art, after reading this disclosure how to make and use other implementations of the present invention in which one or more of the steps are omitted or are performed in a different order than the one presented or simultaneously. 
     It is to be understood that the disclosure teaches just one example of the illustrative embodiment and that many variations of the invention can easily be devised by those skilled in the art after reading this disclosure and that the scope of the present invention is to be determined by the following claims.