Abstract:
The present invention integrates the inference of a first mobile wireless device proximity to a second wireless device, access point, or other source (target source) by way of receiving, measuring and storing signal strength (or its equivalent) from the source as an integral element of game play for a game. The proximity determination that one wireless device is close to a target source provides the ability to create new and interesting interactive games that can take advantage of the communication and network capabilities of mobile wireless devices.

Description:
The present application claims benefit of Provisional Application No. 60/723,308 filed Oct. 4, 2005, the contents of which are incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to wireless networks. More particularly, the present invention relates to game based communications between wireless devices within point to point communication of each other. 
     BACKGROUND OF THE INVENTION 
     Interactive gaming has become ubiquitous among digital communication devices. The reduction in size and cost of wireless communications devices, as well as reduction in cost of processors and memory, have enabled mobile wireless devices to exceed the capabilities of large computers of years past. It is well known that wireless devices such as telephones, email devices, and PDA&#39;s have been enabled for wireless communication with Internet protocol backbone networks by way of protocols such as the several forms of IEEE 802.11. 
     Other local wireless protocols are in widespread use. Bluetooth-enabled devices communicate to determine whether they may share data or whether one needs to control the other. The connection and communication process is performed automatically. Once a conversation between the devices has occurred, the devices form a network. Such automatic connection and communication systems create a Personal-Area Networks (PAN). Other wireless standards that may be used include IRDA, hiperlan/2, and HomeRF. When a PAN is established, such as between one VoIP or Bluetooth mobile phone and another, the members of the PAN can communicate directly. The more generally preferred mode of operation for such a mobile telephone is connection to a local access point, whereby the user can contact any source available to the Internet for conversation or gaming. 
     In a local area network communication, the access point transmits information separately to each local wireless device. An advantage to using a point-to-point communication is that different information (e.g., customization) may be sent to each wireless device. Even if the same information is being sent to several recipients (e.g., ensuring uniformity of a game&#39;s state for all local users coordinated by a remote server), however, in a point-to-point communication with multiple recipients, the information is transmitted redundantly to each recipient. However, an access point, comprising a wireless communication module and access point server which connects to an IP network, game state information may be transmitted, daisy chain, along point-to-point communications from an access point within range of only one wireless device, thereby extending the effective communication range of the access point. 
     The addition of 802.11 Wireless LAN (WLAN) capability to wireless devices enabled mobility. Interactive games where several players interact based on a physical location have been described in U.S. Pat. No. 6,932,698. That patent describes a system requiring the sophisticated hardware and software of a GPS locator, which necessarily reduces the size and increases the cost of a game playing wireless device. 
     Some mobile wireless devices are capable of sensing signal strength of a wireless communication target. The IEEE 802.11 standard defines a mechanism for measurement of RF energy by a wireless NIC. This numeric value is an integer with an allowable range of 0-255 (a 1-byte value) called the Receive Signal Strength Indicator (RSSI). RSSI is an arbitrary integer value, defined in the 802.11 standard and intended for use, internally, by the microcode on the adapter and by the device driver. For example, when an adapter wants to transmit a packet, it must be able to detect whether or not the channel is clear (i.e., nobody else is transmitting). When a 802.11 wireless device is in communication with an access point and is roaming, there comes a point when the signal level received from the access point drops to a somewhat low value (because the device is moving away from the access point). This level is called the “Roaming Threshold” and some intermediate (but low) RSSI value is associated with it. Such information is sensed and stored for use by a device control program for the wireless device. It is thus well known to provide a wireless device with information concerning receiving signal strength of another wireless device, an access point, or some other intended source of wireless signals. 
     There is a need for a first mobile wireless device enabled for game play to detect and use the inference of proximity to a second wireless device, access point or other source (target source) by way of receiving signal strength (or its equivalent) from the source as an integral element of game play for a game. 
     SUMMARY OF THE INVENTION 
     The present invention integrates the inference of a first mobile wireless device proximity to a second wireless device, access point, or other source (target source) by way of receiving, measuring and storing signal strength (or its equivalent) from the source as an integral element of game play for a game. The proximity of one wireless device is close to a target source provides the ability to create new and interesting interactive games that can take advantage of the communication and network capabilities of mobile wireless devices. 
     The first wireless device is adapted to detect wireless signal strength from a target source, store that information and compare it to a range signal strengths which are well known for a particular wireless network. For instance, a well known wireless network operates at a full signal strength output of 100 milliwatts, whose signal strength rapidly drops off with in a known rate with unimpeded distance. Some correction of distance of a first wireless device and a target source may be made for obstacles such as walls or local bandwidth interference. 
     In any event, the first wireless device is capable of calculating an approximate radial distance from a target source, even if signal strength from the target source drops below acceptable levels for bi-directional communication. While the first wireless device may roam or switch to another wireless device for communication with a PAN or LAN, the first wireless device can continue to measure signal strength from the target source for calculation of approximate radial distance from the target source. 
     In the present invention, radial distance of a first wireless device from the target source under 802.11 mobile wireless devices becomes an element of interactive or solo games played through the user interface of the first wireless device. 
     The mobile wireless devices of the present invention comprise a processor connected via an input/output unit with a user interface and a wireless communication module. The user interface comprises at least those devices to required to participate interactively with game functions and game data of a game. The game functions (such as causing the game to initiate, progress and terminate) and game data (such as video and audio content) operate so that at any given time the game is at a game state. The storage of game functions and game data may be distributed in the invention system among the wireless devices, game servers directly connected with an IP network, and target sources. 
     For instance, all game functions and game data may be stored on a first mobile wireless device, whereby the device control program determines the game state. A wireless device may play a solo game integrating proximity to a target source. Alternately, a first wireless device may form a PAN with a second wireless device, where the proximity of the first and/or second wireless device from the target source is an element of game play. 
     In another form, the game functions and game data may be stored on a game server, whereby wireless devices communication with the server for transmission of game data (such as by streaming communication protocol) and game state to the wireless devices according to their progress and identity to the overall game. Users of the wireless devices at appropriate times provide input from their user interfaces, which is transmitted to the game server for interactive game play. 
     In another form, game data may be stored on each wireless device and game functions are stored on the game server. Communications between the wireless devices and the game server may be limited to game state control of the play of the game. 
     An object of the invention is the use of proximity of one or more wireless devices to a target source as an element of game play in a local network. The progress, rules and functions of virtually any game may be adapted to or already incorporate the physical distance of a player to another player, a goal, or point of avoidance, all of which may be target sources in the invention system. 
     Games can be created or adapted that require the user to move in physical space relative to the target source. Signal strength increase, decrease or lack of change infers relative change in distance of a first wireless device without further calculation of actual distance. Alternately, apparent actual distance may be calculated based on comparison of current signal strength with full signal strength, with some correction optionally for obstacles and noise. 
     In addition, the user interface and device control program optionally comprise means for exchange of voice and data communications during game play. Rules, i.e., game functions may be communicated and/or modified on the basis of data communications between players. As is common among interactive gaming, information indicating rewards and prizes to specific players may be transmitted among the player or players. Data and voice communications could be encrypted. Anonymity of non-group members could be an optional service. 
     Examples of these games or game functions for existing games include:
         Fox hunt type games where a user travels over an area locating a target using a signal on device.   A fox hunt type game where the goal is another mobile user.   A friend finder game that would alert a user when a wireless devices (WLAN) was identified within radio range.   Product shopping games where coupons or monetary rewards were given for following specific rules based on proximity and clicks.   Camera oriented games that require a user to take a picture of a specific object in a location. Picture with timestamp would be part of rules. Picture could be related to proximity found target.   Games could only allow authenticated members to play.   Games could encode broadcast membership information to provide anonymity.   Mobile device could provide programmable proximity cues as part of game.       

     Target sources may be commercial stores or particular products within a store, where a user of a wireless device may play a hot-cold game to try to find the target source. The present invention may integrate specific monetary rewards such as vibration or sound alerts from the wireless device when in proximity of a specific service (coffee shop) or a store making a limited time offer of a product or discount. 
     When a wireless device has been moved to within a required distance of a target source, the user interface may be create by audio or pictoral output reward or assistance information such as maps, coupons, or menus. 
     It is a further object of the invention to provide an output to a display screen or to provide audio output so that a user of a wireless device will be informed of an approximate physical distance of the wireless device from the target source. This is of particular value in location of another person in a crowded situation, as is well known in the cities of New York and Tokyo. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram of the proximity based invention system showing mobile wireless devices, a target source, an access point and a game server. operated by a mobile user, where said device is capable of roaming to other access points. 
         FIG. 2  is room sized embodiment of the invention system of  FIG. 1 . 
         FIG. 3  is a city block sized embodiment of the invention system of  FIG. 1 . 
         FIG. 4  is a pictoral representation of a display screen of a mobile wireless device of the invention system showing a game state of a game played with the invention system. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The invention is now discussed with reference to the figures. 
       FIG. 1  shows mobile wireless devices  106 ,  108  and  110 , each of which is enabled for wireless communication via Internet protocol such as IEEE 802.11 with each other and with access point  102  and target source  112 . Access point  102  is connected via link  126  through the Internet with game server  102 . Game server  102  stores a game program or a portion thereof, such as only game functions, while game data which establishes audio and/or pictoral output to a user interface of the wireless devices. In such a circumstance in which only game functions are stored at the game server  102 , game data may be stored on each of the wireless devices so that game server  102  coordinates a uniform game state is maintained on each of the wireless devices. 
     Mobile wireless devices  106 ,  108  and  110  comprise a processor, wireless communication module and a user interface. The user interface comprises elements selected from the list of speaker, microphone, display screen, pressure sensitive buttons or switches, a touch sensitive screen incorporated in the display screen, and other such input and output devices as may be required for interactive game play with other wireless devices. A device control program on the wireless devices provides for means to establish a personal area network (point to point wireless communications) and/or a local area network (broadcast wireless communications) via the access point and remote conference servers (not shown). The target source may be another wireless device or may be a similarly equipped device enabled for communicating beacon signals to the wireless devices. The wireless devices comprise circuits and programming enabling the wireless devices to detect signal strength of the beacon signals and determine the approximate or relative distance from each wireless device from the target source. This determination of radial proximity is stored in the wireless device and/or transmitted to the game server or one or more of the wireless devices. 
     The determination of radial proximities are transmitted to the location of the operation of game functions, whereby the radial proximities may change the game state, i.e., a user who has moved closer to or farther from the target source will cause the game state to change so that they have advanced, receded, or otherwise affected their position in the game play. For instance, wireless device  106  may have displayed on its display screen an instruction that the user is allowed to move two steps. The user, upon moving the two steps has, without realizing the actual location of target source  112 , moved closer to target  112 . In doing so, the user may be awarded points in a game of “Simon Says” among the users of the wireless devices. In response, the game state of the game program changes and causes relative distances of the wireless devices from the target source  112  may be shown on the display screen in a pictoral representation. 
     Wireless device  106  is shown establishing wireless communication link  114  with access point  104 , communications link  116  with target source  112 , and communication link  118  with wireless device  108 . Wireless device  108  is shown establishing wireless communication link  120  with access point  104 , communications link  122  with target source  112 , communication link  118  with wireless device  106 , and communication link  124  with wireless device  110 . Wireless communication device  110  is outside of range of access point  104  and target source  112 , so must receive all of its input regarding the relative distances of wireless devices  106  and  108  from target source  112  by way of point to point communication via link  124  with wireless device  108 . Wireless device  108  is in point to point communication with wireless device  106  by link  118 . 
       FIG. 2  shows a room size example of the invention system. Assume that target source  112  is hidden or is otherwise in a location unknown to users of wireless devices  106 ,  108 , and  110 , which are shown as game enabled wireless phone having pressure sensitive buttons and a four way directional play device. Other such player input means are well known in game playing. Generally, the arrangement of the elements of  FIG. 1  are repeated in  FIG. 2  for the space of a room accommodating the movement of three users of wireless devices  106 ,  108 , and  110 . 
     Generally, the arrangement of the elements of  FIG. 3  are repeated in  FIG. 3  for the space of a room accommodating the movement of three users of wireless devices  106  and  108 , where target source  112  may be within a building among others on a street, where the users of the wireless devices seek the building concealing the target source. 
       FIG. 4  represents a pictoral representation of a game state created by execution of the game functions of the game program for presentation of game data. Display screen  130  shows a group of trees on a mountain slope target  131 , where outlying target  131  are successively distant progress lines  132 ,  133  and  134 . Proximity based gaming relates each of the progress lines  132 ,  133  and  134  to physical advances of a user bearing a wireless device to a target source. As a user reduces radial distance between themselves and the target source, an indicator on screen  130  will show that a user is approaching target  131 . At passing each of the progress lines  132 ,  133  and  134  on the way to the target source, a user will increase a point count or may lose points as a user moves away from the target source and crosses one of the previously passed progress lines. Many other such games and changes in game state will occur to one skilled in the art with the present disclosure. 
     The above design options will sometimes present the skilled designer with considerable and wide ranges from which to choose appropriate apparatus and method modifications for the above examples. However, the objects of the present invention will still be obtained by that skilled designer applying such design options in an appropriate manner.