Patent Publication Number: US-6215413-B1

Title: User selectable receiver addresses for wireless communication systems

Description:
BACKGROUND OF THE INVENTION 
     This invention relates generally to wireless communication systems and more particularly to an RF receiver with user selectable receiver addressing. 
     Present paging systems identify messages for pager receivers with a pager address number. The address number matches a unique address permanently stored in the pager receiver. Pager messages and associated pager addresses are reformatted into a time division multiplexed data stream and transmitted over a radio frequency (RF) signal. The pager receiver monitors transmitted signals for messages with a transmitted address that matches the receiver address. If a message includes a transmitted address that corresponds with the receiver address, the message is processed and displayed on the pager receiver. 
     Multiple addresses exist in some receivers but the multiple addresses are used for group services or provide different functions such as selecting between voice or data. The multiple addresses are not selectable by the pager user. 
     A single pager receiver is often used by more than one person. For example, if the pager is used while driving a car, the pager user depends on the current car driver and car passengers. When multiple people use the same pager receiver, every message transmitted to the pager receiver is displayed. Thus, the person currently driving the car receives all messages for family members. However, the driver may not want to be disrupted by pager messages sent to other family members. 
     In another example, a father, while carrying a pager in a business meeting, may not want to receive messages directed to his daughter. Further, many pager messages give little information identifying the message sender. Thus, the father may waste time responding to messages directed to his daughter, son or wife. 
     Different persons each having their own personal pager receiver may each need to receive pager messages transmitted to a common telephone number. For example, workers at the same factory may each need to respond to pager messages sent to a common work number. Each employee may also want to receive personal pager messages unrelated to the work messages. 
     While some employees receive both work-related pager messages and personal pager messages during work hours, some employees may not want to receive work-related pager messages during off hours or the personal pager messages of others during work hours. Thus, the pager user must carry two different pager receivers, one pager receiver for work-related messages and a second pager receiver for personal-related messages. 
     In a similar manner, cellular telephone calls are identified by a unique telephone number permanently stored in a cellular telephone. If the cellular phone is shared by different family members, calls sent to one family member may be answered by other family members currently in possession of the cellular telephone. Cellular telephone users are charged a fee each time a cellular phone call is answered. Thus, time and money is wasted when cellular telephone calls are answered by the wrong family member. 
     Cellular telephones can also operate with different personality modules which each store a different cellular telephone number. The current user of the cellular telephone snaps his or her personality module into a cellular telephone. The cellular telephone then receives phone calls for the phone number matching the currently inserted personality module. 
     The personality modules cannot select between multiple authorized receiver addresses previously stored in the cellular telephone. Thus, the personality modules can then be used by anyone even without proper authorization. If lost or stolen, the owner of the lost personality module may be charged for cellular telephone calls made by others on any telephone. Thus, personality modules create a security risk if lost or stolen. 
     Accordingly, a need remains for selectively and securely changing multiple receiver addresses in wireless RF receivers according to the current receiver user. 
     SUMMARY OF THE INVENTION 
     Selectable receiver addressing is used to control how messages are output from different receivers. Receiver users selectively enable and disable personal addresses in the receiver. The receiver turns on for brief periods of time corresponding with time slots in digitally transmitted data. The receiver is synchronized to turn on during transmission time slots where data may be transmitted having associated transmitted receiver addresses matching any one of the enabled addresses stored in the receiver. 
     If a transmitted receiver address matches one of the stored and enabled receiver addresses, the message is supplied to the receiver output. If the transmitted address does not match the stored receiver address, the message is not supplied and accordingly the receiver user is not disturbed. 
     Selectable receiver addressing increases communication efficiency and functionality of pager receivers and other wireless receiving devices by customizing each receiver to the current receiver user. Since messages are selectively output from each receiver, the current user can prevent interruptions from messages for others while also directing messages from other receiver devices to the receiver device currently in the user&#39;s possession. As a result, fewer pager receivers can be used to more accurately relay messages to the correct person. 
     The receiver addresses are enabled and disabled with select and deselect buttons or through other user input devices that serve to identify the current receiver user. For example, the same system that identifies a car operator, controls car mirrors and controls the position of a car seat can be used to select the personal receiver addresses. The processor thus enables the personal receiver address associated with the current car user. 
     In turn, the receiver polls for messages during time periods corresponding with transmitted receiver addresses matching the personal receiver address of the car user. 
     Other devices used to automatically identify the receiver user include infrared (IR) signals transmitted from a personal wrist watch or a personal identification code read with a bar code reader. The IR signal or bar code reader transmits the user identification code to the receiver which in turn enables an associated receiver address. 
     Alternatively, receiver addresses and associated receiver commands are transmitted on the same RF signals carrying pager messages. The receiver user directs a transmitter clearinghouse to send new receiver addresses and associated command codes. The receiver reads the command codes and, if necessary, changes the currently stored receiver addresses. The receiver then polls for messages having message addresses matching the new set of enabled receiver addresses. 
     Receiver addresses are also enabled and disabled according to the time of day. In one embodiment, a receiver address is automatically enabled on a first pager receiver during a first time period and the same receiver address is automatically enabled on a second pager receiver during a second time period. Thus, two people can carry different pager receivers and receive messages for the same receiver address at different selected time periods. 
     Selectable receiver addresses are also incorporated into two-way communication systems such as cellular telephones. A cellular telephone user selectively enables and disables a personal address in the cellular phone. Phone messages with transmitted addresses not matching the enabled receiver address are either not processed by the cellular phone or relayed to an alternative phone number, such as a home phone number. Thus, the cellular phone user is not disrupted by phone calls for others. 
     The foregoing and other objects, features and advantages of the invention will become more readily apparent from the following detailed description of a preferred embodiment of the invention which proceeds with reference to the accompanying drawings. 
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a diagram showing a wireless car pager receiver including user selectable receiver addressing according to one embodiment of the invention. 
     FIG. 2 is a diagram of multiple wireless pager receivers each having programmable receiver addressing according to another embodiment of the invention. 
     FIG. 3 is a detailed schematic diagram of the receivers shown in FIGS. 1 and 2. 
     FIG. 4 is a step diagram showing a method for processing control and message data for the receivers shown in FIGS. 1 and 2. 
     FIG. 5A is a diagram showing some control data addressing commands transmitted by a clearinghouse for changing receiver addresses. 
     FIG. 5B is a diagram showing variable receiver polling protocols for selected receiver addresses. 
     FIG. 6 is a diagram showing different menus for the receivers shown in FIGS. 1 and 2. 
     FIG. 7 is a step diagram showing a method for changing receiver addresses with different receiver inputs. 
     FIG. 8 is a diagram showing cellular telephones with selectable receiver addressing according to another embodiment of the invention. 
    
    
     DETAILED DESCRIPTION 
     FIG. 1 is a diagram showing a pager receiver  12  with programmable user addressing according to the invention mounted in a car  10 . The pager receiver  12  stores multiple user addresses  16  that are manually selectable though select and deselect buttons  22  or automatically selectable through driver preference controller  21 . A message clearinghouse  30  transmits receiver addresses and associated control data  26  and pager messages  28  to the pager receiver  12 . Transmission of pager messages from a clearinghouse  30  to a pager receiver and pager message formats are discussed in detail in U.S. Pat. No. 4,713,808 to Gaskill et al. entitled  Watch Pager System and Communication Protocol  and is herein incorporated by reference. 
     Each stored receiver address  16  identifies a different authorized user of the pager receiver  12 . In FIG. 1, the car  10  is used by any member of a family which includes driver A (Dad), driver B (Mom) and driver C (Son). Because drivers may not want to receive or reply to pager messages addressed to others, each driver can select or deselect which receiver addresses  16  are enabled and disabled, in turn, selecting which messages are supplied to a message display  18 . The current set of available receiver addresses  16  is defined as a menu. 
     A first method for selecting receiver addresses comprises user select buttons  22 . The current car driver  24  is shown the authorized receiver addresses  16  on message display  18 . The driver then scrolls down the menu  16  selecting or deselecting any combination of receiver address  16 . For example, when the father is alone in car  10 , he may only enable the receiver address for driver A. In turn, messages are only output to message display  18  when the message has an associated transmitted receiver address matching the enabled stored receiver address for driver A. 
     Stored receiver addresses  16  are also enabled and disabled according to control signals from the driver preference controller  21 . Driver preference controller  21  is coupled to various user adjustable devices in the car  10  such as the radio (not shown), rear and side view mirror controller  17  and car seat controller  20 . The driver preference controller  21  receives an identification code for the current driver and then automatically adjusts the various user adjustable devices  17  and  20  according to prestored parameters for the identified driver. Driver preference controllers are well known to those skilled in the art and are therefore not described in detail. 
     The output from driver preference controller  21  used for controlling the mirror controller  17  and seat controller  20  is also input to the receiver pager  12 . The receiver pager  12  enables the stored receiver address corresponding with the driver preference control signals. Thus, a receiver address is automatically enabled without manually using select and deselect buttons  22 . 
     Another method for changing receiver addresses comprises transmitting receiver addresses and control data from clearinghouse  30 . A user may want to permanently remove a receiver address or add a new receiver address to menu  16 . For example, driver C (Son) may leave home or start driving another car. Clearinghouse  30  is notified to remove or permanently disable the receiver address for driver C from menu  16 . The clearinghouse  30  transmits control data  26  to receiver  12 . Control data  26  includes commands that direct pager receiver  12  to delete or disable the receiver address for driver C from menu  16 . 
     Selectable receiver addressing provides more efficient use of receiver pagers. Different users can program different paging devices so that messages are received only with the paging device currently in the user&#39;s possession. For example, a user may have access to a portable clip-on pager device (not shown) and the pager receiver in car  10 . If the user forgets the portable pager device while driving in car  10 , messages sent to the portable clip-on paging device would not be received and acted upon until the driver returns to the location where the portable paging device was last placed. 
     With the system shown in FIG. 1, the user simply enables a receiver address in pager receiver  12  having the same receiver address currently enabled in the portable clip-on paging device. Thus, the user can instantly receive pager messages in car  10  which are normally directed to another paging device. 
     FIG. 2 is a diagram of three pager receivers  32 ,  34 , and  36  each having programmable receiver addressing according to another embodiment of the invention and each mounted inside a wrist watch. Each receiver includes two selectable receiver addresses. The first receiver address  38  is a personal address for receiving personal pager messages. The second receiver address  40  is a work address for receiving work-related pager messages. A button  42  on each watch pager manually enables or disables work address  40 . Similar to the system in FIG. 1, a clearinghouse  30  transmits both receiver addresses and control data  26  and pager messages  28  to any of the watch pagers  32 ,  34  and  36 . 
     Receiver addresses are enabled and disabled similar to the system shown in FIG. 1 either manually with button  42  or automatically from the control data  26  transmitted from clearinghouse  30 . 
     Receiver addresses can also be enabled and disabled automatically according to the time of day. Either a timer located in the watch pagers  32 ,  34  and  36  (FIG. 3) or a timer (not shown) located at clearinghouse  30  enables receiver addresses on different watch pagers. 
     To explain further, a first person (Bill) wears watch pager  32  and is normally at work from 8:00 a.m. through 4:00 p.m. A second person (John) wears watch pager  34  and is normally at work from 4:00 p.m. through 12:15 a.m. A third person (Sue) wears watch pager  36  and is normally at work from 12:15 a.m. through 8:00 a.m. 
     Watch pager  32  is either programmed so that receiver work address  40  is enabled in watch pager  32  between 8:00 a.m. and 4:00 p.m. Similarly, the receiver work address  40  is enabled in watch pager  34  between 4:00 p.m. and 12:15 a.m. and receiver work address  40  is enabled in watch pager  36  between 12:15 a.m. and 8:00 a.m. 
     Thus, Bill, John and Sue only receive work pager messages while on the job and are not disturbed by work messages while off duty. The button  42  overrides the above-described timing sequence. Thus, any of the three watch pagers can be commanded to display work messages even when the worker is normally off-duty. 
     FIG. 3 is a detailed diagram of the pager receivers shown in both FIGS. 1 and 2. A processor  52  is coupled to a manual selector such as the buttons  22  shown in FIG.1 or the button  42  shown in FIG.  2 . For the car pager  10  shown in FIG. 1, electrical signals from the driver preference controller  21  are coupled to processor  52 . A packet buffer  56  is coupled to processor  52  and stores the receiver addresses, control data and message data transmitted from clearinghouse  30  (FIGS. 1 and 2) received through an antenna  14 . 
     Storage location  66  is coupled to processor  52  and permanently stores a primary address which uniquely identifies the receiver. Storage locations  68  and  70  are coupled to processor  52  and store secondary addresses associated with different selectable user addresses. Display  18  is coupled to processor  52  and displays pager messages having an address matching one of the enabled addresses in storage locations  66 ,  68  or  70 . 
     A timer  58  is coupled to processor  52  and serves to control receiver polling according to selected receiver addresses as explained in detail in FIG.  5 B. 
     Packet  45  is a diagram showing one format for data transmitted from the clearinghouse  30  (FIGS. 1 and 2) to the pager receiver processor  52 . Packet  45  includes a control section  46  that contains a primary address for a target pager receiver and control data that determine how receiver addresses are enabled and disabled. Format section  48  contains information regarding the format for messages contained in data section  50 . Data section  50  can contain any of the following: pager messages, an associated transmitted receiver address  51  and new receiver addresses that are loaded into storage locations  68  and  70 . The format for the TDMA data packets is described in detail in U.S. Pat. No. 4,713,808 to Gaskill et al. 
     FIG. 4 explains how message and control data is processed in processor  52 . Step  72  temporarily stores packets  45  into packet buffer  56  (FIG. 3 ). Decision step  74  looks for a bit combination in the control section  46  that identifies the packet  45  as containing either control data or message data. If the data section  50  contains control data, decision step  80  compares the primary address transmitted in control section  46  with the primary address stored in storage location  66  (FIG.  3 ). If the primary addresses do not match, the control data is not intended for the receiver and decision step  80  returns to step  72  to poll for the next packet  45 . 
     If the primary address in control section  46  matches the primary address in storage location  66 , step  82  decodes the control data. Step  84  loads, deletes, enables or disables receiver addresses in storage locations  66 ,  68  and  70  according to commands decoded for the control data as further described in FIG.  5 A. Step  86  synchronizes the receiver to poll transmitted signals during time slots that may contain data for the enabled receiver addresses. Step  86  is described in detail in FIG.  5 B. The processor  52  then returns to step  72  to poll for subsequently transmitted packets  45 . 
     If the bit combination in control section  46  indicates that the data section  50  contains message data, decision step  76  compares the transmitted receiver address  51  in data section  50  to each enabled address in storage locations  66 ,  68  and  70 . If the receiver address matches an enabled receiver address in the storage locations, step  78  supplies the message in data section  50  to display  18  (FIG.  3 ). If the transmitted address  51  in data section  50  does not match an enabled receiver address, decision step  76  returns to step  72  and polls for the next packet  45 . 
     FIG. 5A is a table showing a sample of some different receiver address commands transmitted in control section  46  (FIG. 3) and performed in step  84  in FIG.  4 . The control data  46  can command the processor  52  (FIG. 3) to either load, delete, enable or disable different addresses at different receiver storage locations. The specific address loaded or disabled is transmitted in data section  50  of the packet  45 . 
     FIG. 5B is a diagram showing how the receiver  32  polls transmitted data according to enabled receiver addresses. As mentioned above, data is transmitted in a continuous time division multiplexed data stream  130 . Multiple time slots of 13.6 milliseconds are grouped together into subframes of approximately 14 seconds. Packets  131  for one or more of the receiver addresses are transmitted in different time slots in the subframe. The same packet is transmitted several times in the same master frame to increase system reliability. 
     To extend operating life in battery operated receivers, the receiver  32  polls according to enabled receiver addresses. For example, when stored receiver addresses A and B are enabled, the receiver is activated at times  132  and  134 . Times  132  and  134  are synchronized with time slots that may contain packets having transmitted receiver addresses matching address A and address B. 
     Referring to data stream  131 , if only receiver address A is enabled in receiver  32 , the receiver  32  is only turned on during time period  132 . Since receiver address B is not enabled, the receiver  32  does not waste battery power polling time slots containing packets for disabled receiver addresses. 
     FIG. 6 is a diagram showing additional data that is transmitted along with various receiver addresses in data section  50 . A menu  88  for receiver addresses in the car receiver shown in FIG. 1 includes a title, name and telephone number for drivers A, B and C and a default address for car  10 . The wrist pagers  32 ,  34  and  36  shown in FIG. 2 store a menu  90 ,  92  and  94 , respectively, which includes a title, name and telephone number for both a personal receiver address and for a work receiver address. 
     FIG. 7 is a step diagram showing the steps performed by the processor  52  in FIG. 3 when responding to direct user inputs. Step  96  polls for an enable or disable input. Decision step  98  determines if the input comes from the manual buttons. For example, in FIG. 1, processor  52  monitors buttons  22  and in FIG. 2, processor  52  monitors button  42 . The selected receiver addresses are enabled or disabled in step  100 . 
     For a car pager, decision step  102  determines if the input signal comes from the driver preference controller  21  (FIG.  1 ). Step  104  identifies the user according to the driver preference control signals. Step  106  then enables the receiver address associated with the identified user and disables all other receiver addresses. 
     If decision step  108  determines that the timer  58  (FIG. 3) is selected, step  110  enables the selected address for the selected time period and disables the selected address outside the selected time period. Accordingly, the receiver only polls time slots that may contain messages for selected addresses (See FIG.  5 B). 
     FIG. 8 is a diagram showing another embodiment of the invention used in conjunction with a cellular telephone system. Cellular telephones  112  and  122  each contain four selectable authorized receiver addresses in menu  114  similar to the menu  16  stored in car pager  12  (FIG.  1 ). Watches  116 ,  118  and  120  each transmit an infrared (IR) signal that identify the watch user. For example, watch  116  transmits an IR identification signal associated with address A (Dad), watch  118  transmits an IR identification signal associated with address C (Son) and watch  120  transmits an IR identification signal associated with address B (Mom). 
     Each cellular telephone  112  and  122  contain receiver circuitry similar to that shown in FIG.  3  and operates in the following manner. If located in the vicinity of cellular phone  112 , the IR signals from both watches  116  and  118  enable stored receiver addresses A and C on receiver menu  114 . Since only watch  120  is within the vicinity of cellular phone  122 , only receiver address B (Mom) is enabled in cellular phone  122 . The cellular phones  112  and  122  also include a receiver address select button  124  for manually enabling and disabling the receiver addresses in menu  114 . 
     Cellular phone  112  then only processes calls having telephone numbers matching receiver address A (Dad) or receiver address C (Son). Similarly, cellular phone  122  only processes calls with telephone numbers associated with receiver address B (Mom). 
     The cellular telephone stores a list of authorized user addresses. For example, both cellular phone  112  and  122  contain only four authorized users (A, B, C, and Default). Calls will not be processed for receiver addresses transmitted from watches that are not included in menu  114 . Thus, the system shown in FIG. 8 provides more security than personality modules which can operate on any phone that accepts the modules. 
     Telephone calls in the system shown in FIG. 8 are also more efficiently transmitted to different cellular phone users than standard cellular phone systems. For example, the mother will not receive telephone calls sent to the son or father&#39;s telephone numbers. Thus, money is saved since the mother does not spend phone time answering calls for other family members. 
     Having described and illustrated the principles of the invention in a preferred embodiment thereof, it should be apparent that the invention can be modified in arrangement and detail without departing from such principles. I claim all modifications and variation coming within the spirit and scope of the following claims.