Patent Publication Number: US-10785599-B2

Title: Device, system and method for recording personal encounter history

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This patent application is a continuation of and claims priority to U.S. patent application Ser. No. 15/276,110, filed Sep. 26, 2016, now U.S. Pat. No. 10,271,164, which is incorporated herein by reference in its entirety and which is a continuation of and claims priority to U.S. patent application Ser. No. 14/681,836, filed Apr. 8, 2015, now U.S. Pat. No. 9,456,051, which is incorporated herein by reference in its entirety and which is a continuation of and claims priority to U.S. patent application Ser. No. 14/024,325, filed Sep. 11, 2013, now U.S. Pat. No. 9,015,492, which is incorporated herein by reference in its entirety and which is a continuation of and claims priority to U.S. patent application Ser. No. 11/611,475, filed Dec. 15, 2006, now U.S. Pat. No. 8,566,602, which is incorporated herein by reference in its respective entirety. 
    
    
     TECHNICAL FIELD 
     Embodiments are related to mobile communication devices. The subject matter described herein relates more particularly to a system and method allowing a user of a wireless communication device to record and recall personal encounters. 
     BACKGROUND 
     Life is meeting people, making contacts and developing personal relationships. Traditionally the primary tool used to make a contact and to keep track of those people whom one encounters was the business card or an address book. There are a variety of methods and devices in the market to keep track of one&#39;s contacts including business card filing systems, business card scanners, rolodexes and numerous database products. However, all of these methods require physical delivery of a business card, a letter or verbal conversation. Recent innovation includes delivering business contact information via e-mail from which a database may be populated. 
     Business cards and address books are expensive to print, inconvenient to carry and are often forgotten when they may be needed most. Unless one works for a company, most people do not carry business cards. They certainly do not carry them to social or recreational activities. Therefore, it would be useful to have an inexpensive, effortless and omnipresent means to record personal encounters as one proceeds through their day. 
     Wireless communication devices are popular and ubiquitous devices amongst the general populace and may be used to store contact information. The cost of wireless communication devices has plummeted and functionality has improved exponentially. Most adults and a growing number of children routinely carry a cell phone or other wireless communication device on their person and often manually record contact information that they have obtained from their acquaintances. However, the contact information must first be obtained in the conventional and sometimes awkward manner of asking for it or otherwise being given it, and then the user must manually enter the contact information into the device. Thus, conventional wireless communications devices fail to adequately address a user&#39;s interest in easily obtaining information about personal encounters. 
     SUMMARY 
     While energized, wireless communication devices are continuously vigilant, scanning a frequency for an indication of an incoming call. The omnipresence, vigilance and computing power of a wireless communication device can be leveraged to record personal encounters and retrieve that information at a later time. It should be appreciated that this Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. 
     Provided are exemplary embodiments including a method for creating and using a personal encounter history using a communication device. The method involves the communication device receiving the transmission of a pseudo identifier from a proximal communication device where the pseudo identifier is associated with the user of the proximal communication device. Once received, the method continues with the wireless communication device requesting and receiving the actual identification of the user of the proximal communication device that is correlated with the pseudo identifier. 
     Exemplary embodiments include a communication device including a transceiver capable of communicating wirelessly with a mobile telecommunications network, a memory device and a processor. The processor, being in communication with the memory device and the transceiver, is capable of receiving a pseudo identifier from a proximate communication device and then requesting an actual identification correlated with the pseudo identifier of the proximate communication device. 
     In accordance with other exemplary embodiments, a computer readable medium is provided with instructions to perform acts to create and use a personal encounter history using a communication device. While moving from place to place, the communication device may receive the transmission of a pseudo identifier from a proximal communication device where the pseudo identifier is associated with the user of the proximal communication device. Once received, the communication device may then perform acts to associate the proximal pseudo identifier with an environmental circumstance in which the request for the proximal pseudo identifier occurs. 
     Other apparatuses, methods, and/or computer program products according to embodiments will be or become apparent to one with skill in the art upon review of the following drawings and Detailed Description. It is intended that all such additional systems, methods, and/or computer program products be included within this description, be within the scope of the present invention, and be protected by the accompanying claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1A  is an overview illustrating a system for creating and using a personal encounter history utilizing a cellular network only. 
         FIG. 1B  is an overview illustrating a system for creating and using a personal encounter history utilizing a local wireless network. 
         FIG. 2  depicts an example of a wireless communication device configured to create and use a personal encounter history; 
         FIG. 3  is an exemplary flow chart demonstrating a method for creating a personal encounter history. 
         FIG. 4  is a depiction of a central server. 
         FIG. 5A  is an exemplary flow chart demonstrating the operation of the central server for creating and using a personal encounter history. 
         FIG. 5B  is an exemplary flow chart demonstrating the operation of a wireless communication device for creating and using a personal encounter history. 
         FIG. 6  is an abstract simplified depiction of a personal encounter database. 
     
    
    
     DETAILED DESCRIPTION 
     The following disclosure is directed to an apparatus, system and method allowing the automatic recording of a personal encounter by a user of a wireless communication device (“WCD”) with the user of a proximate WCD. A WCD may be any wireless communication device. Non-limiting examples may include a cell phone, a PDA, a pager, an MP3 player, a miniaturized computer and the like. 
     In the following detailed description, references are made to the accompanying drawings that form a part hereof and which are shown, by way of illustration, using specific embodiments or examples. Referring now to the drawings, in which like numerals represent like elements through the several figures, aspects of the apparatus and methods provided herein will be described. 
     The use of WCDs has grown exponentially over the last decade. Today, most adults and a growing number of children carry a WCD of some type or another. The most common WCD is the ubiquitous cell phone; however, there are millions of devotees to pagers, personal digital assistants (“PDA”), Blackberrys® and other devices. Technologies are also merging. For example MP3 players may be incorporated into cell phones and vice versa. Users of WCDs depend upon them to keep them connected to business, family and friends in an increasingly hectic world. 
     Throughout the day, one encounters many different people at various locations under a plethora of environmental conditions. Being social animals, people tend to stop and talk, even briefly, when encountering a person of interest. Business conventions, trade shows and seminars are usually designed with ample time for participants to meet and socialize. During an encounter, business cards are the traditional means by which people acknowledge and record the encounter. 
     However, small talk takes time that may not be available in one&#39;s hectic schedule. At a busy reception or convention it may be next to impossible to meet even a small fraction of those in attendance. A forgone encounter may be a sales opportunity lost or relationship that never begins. In these situations, it may be desirable to have a WCD that detects the user&#39;s encounters, records them and correlates them with environmental factors for easy retrieval at a later time. If so configured, a WCD may be able to detect and record similarly enabled WCDs merely by passing within a certain range. Transmitted identification data and the accompanying environmental circumstances, as measured by the WCD, may then be recorded and researched at the user&#39;s leisure. The number of encounters that may be recorded is limited only by the capacity of the memory devices available to the WCD. 
     As a non-limiting example, such a circumstance may concern a sales convention. Most sales conventions host hundreds if not thousands of participants. It is impossible to meet even a modest portion of the attendees, and most attendees harbor their business cards lest they exhaust their supply for those encounters where it may be important to have a card at the ready. By configuring a WCD according to the subject matter described herein, a user may effortlessly record an encounter with every participant with a similarly configured WCD that comes within a desired range and be able to retrieve the data at a later time. 
     In the following detailed description, references are made to the accompanying drawings that form a part hereof and which are shown, by way of illustration, using specific embodiments or examples. Referring now to the drawings, in which like numerals represent like elements through the several figures, aspects of the apparatus and methods provided herein will be described. 
       FIG. 1A  is an overview of an exemplary system consistent with the disclosure herein. Wireless communication device (“WCD”)  20  may be any type of wireless communication device. Non-limiting examples of a WCD  20  may be a cell phone, a PDA, a pager, a MP3 player, a miniature computer and the like, but a WCD does not have to be portable. As a further example WCD  20  may be a conventional desktop computer or a lap top with wireless capability. WCD  20  may include software objects to enable personal encounter capability. 
     WCD  20  may be capable of short range, local communication with nearby or “proximate” WCDs  30 - 32 , that are similarly configured. There may be any number of proximate WCDs, however, only four are depicted herein for the sake of clarity. The term “proximate” used herein may be any short distance ranging from millimeters to a distance that may encompass a large meeting area or even a sports stadium. Such short range communication may be by radio transmission, audio transmission, light transmission or a combination thereof. Short range radio transmission may be accomplished by a transceiver capable of communicating using a short range radio standard that may include at least one of Bluetooth®, Ultra-Wideband (UWB), Wireless USB (WUSB), Wi-Fi (IEEE 802.11), Zigbee (IEEE 802.15.4), WiMAX, WiBro, infrared, near-field magnetics and HiperLAN standards. Light transmission may be accomplished using any available technology suitable for a manufacturer&#39;s purposes such as with Laser, infrared, visible and ultraviolet spectrums. Audio transmission may be accomplished in any desirable frequency range including those frequency ranges that are not discernible by humans. 
     Each of the WCD  20  and the proximate WCDs  30 - 32  may also be capable of long range communication with a telecommunications system  10 . The telecommunications system  10  may be any telecommunications system including a mobile telecommunications system where the user may travel from base station-to-base station or hot spot-to-hot spot. A telecommunications system may be an analog or digital cellular telecommunications system. Moreover, the telecommunications system  10  may be a Personal Communication Service (PCS) in either of its analog and digital versions. The telecommunication system  10  may utilize Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA) or Global System for Mobile (GSM) technologies. The telecommunication system  10  may also be a satellite communication system and still fall under the purview of this disclosure. Telecommunication system  10  may optionally include a Geographic Information System (“GIS”)  60  and a central server  65 . A GIS is a centralized database system containing detailed cartographic and aerial photography information that may be used to augment the personal encounter information discussed herein. 
     Each of the WCD  20  and the proximate WCDs  30 - 32  is associated with a corresponding user  21  and  40 - 42 , respectively, and each includes a unique user identifier  22  and  50 - 52 , respectively, by which to identify itself to other WCDs. A user may use their own name or the name of their company much like a business card if one so chooses. 
     However, to safeguard privacy, user  21  may create within their respective WCD  20  a pseudo identifier (“PID”)  22  which uniquely identifies the user  21 . A PID may be a user created moniker not unlike a user ID used to access a web site. In the alternative, a PID may be a hash. 
     The WCD  20  may contain a software object that may generate a hash unique to the user  21 . A hash is an algorithmic combination of two or more concatenated alphanumeric data strings. The data strings may be any alphanumeric information but it may be convenient to use information unique to the user  21 . The data strings are first concatenated, combined and/or arranged in any suitable manner prior to being hashed. Hashing may be accomplished by any standard cryptographic hash algorithm. As non-limiting examples, algorithms such as SHA-1 or MD5 may be used. A simple hash may look like: 
                                     String 1   String 2   Pseudo Identifier                                                        495-86-7348   +   Jun. 6, 1960   →   Hash Algorithm   93ieiw384n96dbhe                    
The resulting PID hash is a unique identification for that particular user. However, it is certainly possible for a user to have multiple unique PIDs for different purposes much like a person may have multiple user IDs for different web sites. Each of the user IDs are still unique to that particular user.
 
       FIG. 1B  may be an alternative arrangement operating with a WiFi hotspot  90 . The WCDs  20  and  30 - 32  may be in radio communication with the telecommunication system  10  from hotspot  90  using transceiver  61 . The Telecommunications system  10  may be a Personal Communication Service (PCS) in either of its analog and digital versions. The telecommunication system  10  may utilize Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA) or Global System for Mobile (GSM) technologies. The telecommunication system  10  may also be a satellite communication system. Alternatively, the transceiver  61  may be in communication with router/switch  62 . Router  62  may be able to transmit information to telecommunication system  10  via Voice over IP (“VOIP”), power line transmission and the like. 
     Locally, hotspot  90  may be operating under any of a number of radio standards via transmitter  61 . Radio standards may include Bluetooth®, Ultra-Wideband (UWB), Wireless USB (WUSB), Wi-Fi (IEEE 802.11), Zigbee (IEEE 802.15.4), WiMAX, WiBro, near-field magnetics and HiperLAN standards. Within hotspot  90 , WCDs  20  and  30 - 32  may also be able to communicate among themselves via a local transceiver  130  that may operate under a different radio protocol, light transmission, audio transmission or a combination thereof. The type of transmission medium might depend upon, among other factors, the power output and the expected distance between communication WCDs. For example, very short distances measured in inches or feet may be suited to audio or light transmission. Longer distances may require a radio frequency transmission. 
       FIG. 2  depicts a non-limiting example of a WCD  20  and its components. WCD  20  may include a Radio Frequency (“RF”) transceiver  102  and an associate antenna  103 . Transceiver  102  may be capable of communicating wirelessly through telecommunications system  10  with proximate WCDs  30 - 32 . Optionally, a WCD  20  may include a secondary transceiver  130  capable of directly communicating with proximate WCDs  30 - 32  within a maximum effective range. Secondary transceiver  130  may be a radio transceiver capable of short range transmissions and may have a secondary antenna  131  or may also communicate by transmitting light or sound signals. Or there may be a combination of all three types of transmission. 
     WCD  20  may also include a screen  105  and keypad  104 . Screen  105  and keypad  104  act as interfaces with user  21 . Further, WCD  20  may include a Global Position System (“GPS”) receiver from which to obtain the geographical position of WCD  20 . Alternatively, WCD  20  may be configured to determine its position by triangulation. Further, a central server  65  of network  10  may also perform any triangulation services. 
     WCD  20  may also include one or more environmental sensors  120 - 128  individually or coordinated in a sensor suite  119 . The sensors may include any number of environmental sensors as required by a manufacturer&#39;s design. Sensors may include optical sensors, audio sensors, motion sensors and weather sensors. Audio sensors may record the voice of the proximate WCD user and the video sensor may capture his picture at the time of an encounter, for example. Further, environmental and geographic data may also be requested and received from a central server  65  within telecommunications system  10 . Environmental data from the sensor suite  119  may be used to associate and/or correlate personal encounters within the context of the user&#39;s surroundings at the time of an encounter. Environmental sensors may be capable of collecting biometric data from the user himself. Such biometric data may include heart rate, temperature or the user&#39;s activity level. Activity level may be measured by a pedometer, for example. 
     WCD  20  may include an Analysis Module (“AM”)  116 . An AM  116  may comprise a single module or several sub modules working in unison. A “module” may comprise software objects, firmware, hardware or a combination thereof. The AM  116  may control the timing and duration of an environmental sampling. A sample may be an instantaneous/spot sample or the sample may extend over an extended period of time as may be required by the analysis that is to be performed by the AM  116 . The environmental samples utilized by the AM  116  in determining a user&#39;s circumstances may be a single sample from a single sensor, sequential samples taken from a single sensor or coordinated samples of any desired duration taken from multiple sensors. Samples can also be taken continually and/or periodically. Where sensor periodicities between sensors vary, the AM  116  may designate that one or more sensor readings remain valid until designated otherwise. AM  116  may coordinate the sampling periodicity to optimize sensor suite  119  performance. Further, the AM  116  may direct one or more sensors in sensor suite  119  to take immediate, ad hoc readings or a series of rapid readings. Sample times and periodicity may also be controlled by the user as a user preference. 
     Sample and signal processing techniques are well known and references to such are widespread and ubiquitous in the art. Non-limiting examples of calculated quantities potentially relevant to a determination of current circumstances may include peak-to-average ratios, variation, frequency of surpassing a threshold, spectral shape analysis via Fourier transforms of time-samples (e.g., Fast Fourier Transforms), spectral shape variation, variation rate and frequency spectrum analysis (e.g., audio, vibration and/or optical). It may also be useful to sample, compare or analyze different color CCD pixels sensed by a camera. 
     Further, each measured audio, motion and optical circumstance sample may be separated into sub-bands of the sensor&#39;s range, be it frequency or other type of range, by passing signals from sensor suite  119  through stacked band-pass filters. Derived aspects may be determined via well-known digital signal processing methods in addition to or instead of analog filtering and ratio detection techniques. The analysis techniques discussed herein are non-limiting examples of techniques that may be used within an AM  116 . Other techniques that may be known to the art may be desirable to determine certain aspects. 
     As non-limiting, illustrative examples of analysis, the AM  116  may directly determine the peak and average intensity levels concerning the user&#39;s audio and/or optical environment utilizing audio and optical sensors such as a microphone and a camera. AM  116  may determine facts about the user&#39;s current circumstances by sampling peak and average translational amplitude (i.e., speed), peak and average spin amplitude, and peak and average vibration. Such measurements may be conducted with inputs from a GPS  106 , accelerometers  122 , tilt meters, vibration meters  126  and the like. Although a GPS  106  may calculate speed when operating under good conditions and strong satellite signals, intermittent reception can hinder GPS speed measurements. Therefore, it may be useful to combine a plurality of sensor inputs to determine a parameter such as speed in order to better ensure a satisfactory level of accuracy when one or more sensors is impaired or ineffective for any reason, including triangulation. Further, AM  116  may utilize indicators of a user&#39;s current or past activity by also utilizing information such as whether there is a call in progress, whether there is menu access/manipulation, searching a contact list, dialing, repeated attempts to dial and the status of a battery charge. 
     As a non-limiting example using sensor suite  119  and AM  116  the user may have had an encounter with a person in the parking lot of a local mall on a hot sunny day. The user may have had a number of encounters that day both inside and outside the mall. In order to locate the user ID of that particular encounter, the user may query or search a list of his encounters that day looking for an encounter that occurred at an approximate time and that registered a 92° ambient temperature and a low noise level, for instance. An ambient temperature of 70° associated with a previous or subsequent encounter may indicate other encounters that occurred inside the mall or while driving in the parking lot in an air-conditioned car. 
     The personal encounters and the corresponding environmental circumstances measured may be saved to a database  109  resident in memory device  108 . The memory device  108  may be comprised of any number or types of memory devices that conform to a manufacturer&#39;s requirements. Examples of memory devices include magnetic disks, flash memory, memory sticks, Random Access Memory, and Read Only Memory. The memory  108  may be volatile or non-volatile or a combination thereof and may store instructions to be performed by the processor  117  when receiving and sending associated information. As discussed above in relation to the WCD  20 , the processor  117  and the memory  108  are examples of computer readable media. The list of useful memory devices continues to grow over time and any specific examples mentioned herein are not intended to limit the particular device discussed. The memory  108  may contain other varied information and/or instructions including pass codes and pseudo identifiers. 
     Returning to the discussion of  FIG. 2 , the WCD  20  may have a processor  117  to coordinate the function of its various components. Processor  117  may include a central processing unit, an embedded processor, a specialized processor (e.g., digital signal processor), or any other electronic element responsible for interpretation and execution of instructions, performance of calculations and/or execution of voice recognition protocols. Processor  117  may communicate with, control and/or work in concert with other functional components, including at least the sensor suite  119 , the transceivers  102 / 130 , the GPS receiver  106 , the analysis module  116 , and the database  109 . Communications between and among the transceiver  102 , the screen  105 , the keypad  104 , the GPS receiver  106 , alternative transceiver  130 , environmental sensor suite  119  and other WCD  20  components may be facilitated through a bus  118 . Bus  118  may be comprised of one or a plurality of busses as is desired by a manufacturer. 
       FIG. 3  is a flow chart illustrating an example routine  300  for creating a personal encounter history with a WCD  20 . Being merely exemplary, it should be noted that the processes presented may be combined together, rearranged in their order and split into sub-processes as would occur to one of ordinary skill in the art without departing from the scope of the disclosure presented herein. The user  21  of the WCD  20  may first create a user ID at process  305 . The user ID  22  may be a data string that identifies the user or the user&#39;s WCD  20  to other wireless communication devices. Therefore the user ID may be a unique identifier. The user ID may be a true identification such as the real name of the user or the name of the user&#39;s business. However, privacy may be an overriding concern, as such, a PID may be created. A PID may be a user created moniker such as “sales boss”. Alternatively, the WCD  20  may contain a software object that may create a hash based on or more concatenated alpha numeric strings as more fully described above. 
     There are several personal encounter modalities that WCD  20  may operate in at the option of the user. The WCD  20  may be able to toggle through the several modalities by manipulating a set of keys on keypad  104  or touch screen  105 . The user  21  may be able to select a desired mode at process  306 . 
     A personal encounter WCD  20  may be able to operate in a “broadcast mode”  315 , a “query mode”  320  or a “manual mode”  335 . The WCD may be able to operate in all three modes concurrently. However,  FIG. 3  illustrates an iteration approach wherein each “broadcast” takes only an instant in time as perceived by a user. In this respect, the WCD  20  checks to verify the current operating mode selection for each iteration at process  310 . 
     In a broadcast mode, the WCD  20  broadcasts its user ID to the world on a periodic basis at process  325 . The broadcast periodicity may be regular or irregular. Alternatively, the user may choose to instruct his WCD  20  to periodically broadcast a query to proximate WCDs to transmit their user IDs as responses. Or, the WCD  20  may be programmed to broadcast both its user ID  22  and also broadcast a query for other user IDs  50 - 52 . The specific method(s) will depend on user choice and possibly a system standard developed by a telecommunications service provider. 
     Personal encounter situations vary with the circumstances. As such, a user  21  may desire to control the broadcast of his user ID by adjusting what may be called an “incognito level”. In a public trade show, for example, a user  21  may desire that their user ID  22  be distributed widely such that his presence at the show registers on as many proximate WCDs as possible. In such situations the user may want his incognito level to be low. For a low “incognito level” the broadcast transmission power may be increased to a maximum level commensurate with the battery capacity of the WCD  20 . To cover a wide area a low incognito level may use a radio transceiver as the local transceiver  130  with which to broadcast. As an additional feature of an incognito level, the WCD  20  may be configured to merely respond with user ID  22  in response to a query from a proximate WCD  30 - 32  for User IDs. Such a mode may improve privacy and reduce power consumption. 
     In other situations, the user  21  may desire that only a limited group of discrete individuals receive and record their user ID  22 . Therefore, the user  21  may desire a high incognito level. To accomplish that the WCD  20  may reduce the broadcast power of the transceiver  130  or may select a transceiver that communicates via a high pitched, inaudible sound or infrared light transmissions. There are any number of incognito levels as will be apparent to one skilled in the art. 
     Further, the user  21  might select a “manual mode”  335  whereby the user  21  and the proximate WCD user  40 - 42  may more privately transmit their user IDs by manipulating a button or a set of keys on keypad  104  or touch screen  105 . Such discrete transmissions may be done using an infrared light transmission, audio transmission or a very low power radio transmission. Manual mode allows the WCD  20  to remain in standby  365  until needed. Alternatively, manual mode may be used to override the previous mode setting at process  311 . If the mode was set to “broadcast”, “query” or both, activating the manual mode may suspend the previous mode at process  365  to allow the manual mode functionality to take place. Alternatively, the WCD  20  may also be placed in “manual-broadcast”, “manual-query” or all in three modes simultaneously where the user may transmit or receive at will in addition to the automatic broadcast. 
     If user  20  desires to transmit his user ID  22  he may narrowcast his user ID  22  by bringing his WCD  20  within range of a proximate WCD  30 - 32  and triggering a single transmission, or a short burst of transmissions from local transceiver  130 . Simultaneously or sequentially, the proximate WCDs  30 - 32  may transmit their user IDs  50 - 51  which are received by WCD  20  at process  380 . In addition, the manual mode may allow the user to flag or annotate a particular encounter for easy retrieval. Annotation of an encounter may include the taking of a photograph with an optical sensor (i.e., a camera) integral to the WCD  20  or typing an annotation. 
     Regardless of the operating mode in use, the receiving WCD  20  may sample the user&#39;s  21  environmental circumstances with sensor suite  119  at process  340 , as discussed above. Sample results are time stamped and stored in database  109  until uploaded to central server  65 . Simultaneously or nearly simultaneously with the sample, the WCD  20  may receive the user IDs  50 - 52  of any proximate WCDs  30 - 32  that may be transmitting within reception range at process  345 . The received user IDs  50 - 52  may then be time stamped and stored to database  109  in memory device  108  at process  350 . It should be noted that WCD  20  may be programmed to recognize a particular proximate user ID or set of proximate user IDs  50 - 52  when received and to alert the user  21 . Thus user  21  may be notified when an expected or unexpected user  50 - 52  has arrived within range of WCD  20 . 
     The user&#39;s  21  geographic position may also be recorded at the time of recording at process  355 . The user&#39;s  21  position may be determined from the GPS receiver  106  or the WCD  20  may triangulate its position if it is so configured. To facilitate the use of geographic data of the user  21 , a third party or the telecommunication system GIS  60  may assign a location pseudo ID (a “LPID”) so that an alpha numeric name may be substituted in the data base for raw GPS coordinates. Such LPID may be “The ABC Club, Atlanta”, for example, instead of a latitude and longitude. 
     At process  360 , each user ID  50 - 52  received from proximate WCD  30 - 32  may be associated and/or correlated by processor  117  with at least some of the environmental data sampled by sensor suite  119  at process  340 ; the time the user ID  50 - 52  was received; and may also include the geographic position where the user was located when the user ID  50 - 52  was recorded (See  FIG. 6 ). WCD  20  may also correlate a personal encounter with the presence of other proximate users. In situations where there are multitudes of proximate WCDs, user  21  may screen out undesired, distant proximate users by setting a limit on the range to those users. Using a sports stadium as an example, there may be thousands of potential proximate WCDs that could be recorded. Such a large volume of irrelevant encounters may be undesirable. Therefore, user  20  may limit the acceptance of any user IDs to those encounters that occur within a few feet of WCD  20 . 
     After the data is correlated the process may begin anew at process  310 . A WCD  20  may have limited data storage capacity in memory device  108 . To increase the operating capacity of WCD  20 , WCD  20  may periodically upload its latest personal encounter history from memory device  108  to a central server  65  within telecommunication system  10 . 
       FIG. 4  shows components of an example of the central server  65 . The central server  65  may include the standard components of a server computer including a processor  430 , memory  440 , input/output devices  450 , mass storage  420 , and a network interface  410 . The processor  430  communicates with external devices including WCD  20 , WCDs  30 - 32  and router  62  via the network interface  410 . The processor  430  may be a single processor, multiple processors or multiple distribute processor and may be a dedicated/special purpose processor or a general purpose programmable processor or some combination. The processor  430  performs actions based on instructions either hard coded into the processor  430  or stored in the memory  440 . Processor  430  executes several system functions including receiving encounter information from reporting WCDs, storing and collating the encounter information, responding to query&#39;s for identification information and, if desired, facilitating the contact between users. Examples of the logical operations performed by the processor are discussed below in relation to  FIG. 5   a.    
     The memory  440  may be volatile or non-volatile or a combination thereof and may store instructions to be performed by the processor  430  when receiving and sending information. As discussed above in relation to the WCD  10 , the processor  430  and the memory  440  are examples of computer readable media. 
     The input/output device  450  may be used for local operation and management of the central server  65 . The input/output device  450  may include a keyboard, mouse, display, and the like. 
     The mass storage device  420  may contain PID and actual user identification information and/or it may contain applications such as an operating system for the personal encounter service. Thus, the processor  430  may access the storage device  420  when implementing the personal encounter service. The mass storage device  420  is another example of a computer readable medium. 
     At his leisure, user  21  may sort, correlate and search his personal encounter database  109  or  421  to mine contact information previously recorded. Since each personal encounter had been time stamped and correlated with the environmental factors including geographic location, the personal encounter database may be categorized and searched in a variety of ways. 
       FIG. 5 a    is a flow chart illustrating a method for retrieving PIDs and actual identification information by central server  65 . Being merely exemplary, it should be noted that the processes presented may be combined together, rearranged in their order and split into sub-processes as would occur to one of ordinary skill in the air without departing from the scope of the disclosure presented herein. As a non-limiting example, it is assumed that user  21  wishes to get in touch with the user  40  of proximate WCD  30  whom he briefly met at the airport departure lounge the previous day along with a mutual friend  41 . The user  21  may use his WCD  20  to search his personal encounter database  421 . Alternatively, user  21  may access his personal encounter database  421  over the internet via a web page or by an interactive voice response system over the telephone. 
     User  21  knows the encounter was made at the airport between 10:00 and 11:00 AM while inside at the departure gate with their mutual friend  41  who also possesses the proximate WCD  31 . Beginning at process  505 , user  21  may initiate a query to the central server  65  and database  421  for all encounters between 10:00 and 11:00. User  21  may narrow his query results further, by selecting a LPID (i.e., Airport). An initial query may be as general or specific as the user may wish it to be by adding search criteria. The user  21  may also remember that the encounter was made while both parties were sitting in company with user  41 . As such user  21  may again limit his selections by selecting a limitation of his rate of motion as zero velocity. Conversely, if the encounter was made while riding on the parking shuttle or the tram, velocity may be non-zero or erratic and there may have been characteristic traffic or tram sounds sampled as well. User  21  may also look for an encounter at the same time as an encounter with user  41 . If the user  21  has not yet uploaded his encounter information to the central server  65  then the query would be made to database  109  of WCD  20  instead of the database  421  of central server  65 . 
     When the user  21  locates the personal encounter of interest in database  421  at process  510 , the user  21  may want to contact proximate user  40  through telecommunication system  10 . At decision point  520 , if user  40  had used his true name during the encounter then the user  21  may simply decide to call the person. Telecommunication system  10  may maintain a user directory. Or, proximate user  40  may have included contact data in his identification information. 
     However, if proximate user  40  has used a pseudo identity to protect his privacy there may be no direct way to contact user  40  since the identification information returned by the central server may simply be a PID. The processor  430  decides if a PID was used at decision point  530 . If a true ID was used the contact information may be sent by central server  65  directly to user  21  at process  535 . If a PID was used, user  21  may be prompted by central server  65  to query central server  65  for the contact information based on user  40 &#39;s PID. Central server  65  may receive the query at process  540 . The central server  65 , in turn, forwards the query to proximate user  40  thereby notifying them of the identification request at process  545 . If central server  65  receives a denial from user  40  at decision point  550 , then the process ends. If not, proximate user  40  may authorize the server  65  to provide user  21  with their identity and/or contact information at process  560 . 
     The disclosure authorization granted by proximate user  40  at process  550  may be regulated by a set of privacy rules  441  at process  570 . As an illustrative example, there may be a phased disclosure. Upon the first identity query, user  40  may have authorized telecommunications system  10  to automatically release his name and e-mail to user  21 . Also as an example, if user  21  was casually known to user  40 , user  40  may indicate that the telecommunications system  10  is authorized to release his home phone as well. A myriad of phased disclosure rules may be designed by one skilled in the art to satisfy a particular purpose. An additional authorization rule may be a “disclose yourself first” rule where the requesting party must fully disclose their identity and contact information before the telecommunications system  10  can release the queried party&#39;s information. Once the privacy rules have been complied with the central server  65  may release the contact information of user  40 . 
     It should be noted that the above disclosure may be combined with other forms of privacy security. For example, a user&#39;s true identity may be rights protected much like a music file is protected from being copied from a licensee. Such additional protections would prevent one user who knows or has access to a second user&#39;s true identity from electronically transferring/selling the data to a third user. 
     Continuing the above example where user  21  wishes to get in touch with the user  40  of proximate WCD  30 ,  FIG. 5 b    is a flow chart illustrating a method for retrieving PIDs and actual identification information by a WCD such as WCD  20 . Being merely exemplary, it should be noted that the processes presented may be combined together, rearranged in their order and split into sub-processes as would occur to one of ordinary skill in the art without departing from the scope of the disclosure presented herein. 
     At process  572 , the user of WCD  20  composes a query to find the identity/contact information for user  40  as discussed, supra. At process  574 , the user sends the query. Given the possibility that the central server  65  may have not been updated since the encounter, the WCD  20  may search its local database  109  for the information at process  576 . If the encounter is found then the WCD  20  may prompt the user as to whether they want the contact information for the user at decision point  584 . If not, then the process ends at process  599 . If the user wishes the contact information then the WCD  20  decides if the information in database  109  is useable contact information at decision point  586 . If the contact information is sufficient to contact the user of WCD  30  then WCD  20  may contact WCD  30  directly or may provide the contact information to user  21 . If the encounter information is simply a PID then WCD  20  sends a query to central server  65  for actual identification/contact information at process  590 . If the privacy rules  341 , discussed above, are fulfilled at process  591  then WCD  21  may receive the contact information at process  592 . If the contact information is determined to be useful at decision process  594  (i.e., a telephone number or e-mail), WCD  30  may then be contacted at process  588 . Contact may be via telephone call or by some form of text message. If the contact information is not provided or is insufficient to contact the user  40 , then the process ends at process  599 . 
     However, if WCD  20  cannot find the encounter in its database  109  at process  577  then WCD  20  forwards the query to central server  65  at process  578  so that the central server may search its database  421 . If the search results received from the central server  65  database  421  are determined to be unproductive at decision point  582  then the user is prompted for a new/refined query at process  572 . On the other hand, if the search results received from the central server  65  database  421  are productive at decision point  582  then the user is prompted as to whether they wish to contact the WCD  40  at decision point  584  and the process continues as described above. 
       FIG. 6  is a simplified depiction of a database  421  containing a number of encounter records  670 . In this example column  610  contains the record or encounter number. Column  620  contains the proximate user with whom an encounter was made. Column  630  contains the location were the encounter occurred and column  640  contains the ambient temperature at the time the encounter was made. Database  421  may actually contain a plethora of environmental information, including time and date, commensurate with the capabilities of the sensor suite  119  and other WCD features. 
     The subject matter described above is provided by way of illustration only and should not be construed as limiting. Various modifications and changes may be made to the subject matter described herein without following the example embodiments and applications illustrated and described, and without departing from the true spirit and scope of the present invention, which is set forth in the following claims.