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`US 20020123356Al
`
`(19) United States
`(12) Patent Application Publication
`Michaud et al.
`
`(10) Pub. No.: US 2002/0123356 Al
`Sep. 5, 2002
`( 43) Pub. Date:
`
`(54) APPARATUS, AND ASSOCIATED METHOD,
`FOR DISPLAYING POSITIONAL DATA
`ASSOCIATED WITH MOBILE STATIONS OF
`A RADIO COMMUNICATION SYSTEM
`
`(76)
`
`Inventors: Russ Michaud, Justin, TX (US);
`Heikki Wikstedt, Irving, TX (US)
`
`Correspondence Address:
`DOCKET CLERK
`P.O. DRAWER 800889
`DALLAS, TX 75380 (US)
`
`(21) Appl. No.:
`
`09/797,092
`
`(22) Filed:
`
`Mar. 1, 2001
`
`Publication Classification
`
`(51)
`
`Int. CI.7 ....................................................... H04Q 7/20
`
`(52) U.S. Cl. ..................... 455/457; 455/456; 342/357.01
`
`(57)
`
`ABSTRACT
`
`Apparatus, and an associated method, by which to display
`positional data related to one or more mobile stations
`operable in a cellular or other radio communication system.
`The positional data is displayed at a display device of the
`selected mobile station. The positional data is overlaid upon,
`or otherwise displayed together with, a map display of an
`area encompassing the location at which the mobile station
`is identified to be positioned. A user of the mobile station at
`which the positional data and map display are displayed is
`able to ascertain the position of the mobile station merely by
`viewing the display.
`
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`Verizon 1022
`U.S. Patent No. 8,213,970
`
`

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`Patent Application Publication
`
`Sep. 5, 2002 Sheet 2 of 4
`
`US 2002/0123356 Al
`
`12-1
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`22
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`Display
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`FIG. 2
`
`

`

`Patent Application Publication
`
`Sep. 5, 2002 Sheet 3 of 4
`
`US 2002/0123356 Al
`
`12-1
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`FIG. 3
`
`

`

`Patent Application Publication
`
`Sep. 5, 2002 Sheet 4 of 4
`
`US 2002/0123356 Al
`
`12-1
`
`104
`
`102
`
`ci L - - - 1 - - 1
`
`12-2
`
`FIG. 4
`
`106
`
`Detect Location Of At Least A
`Selected Mobile Station
`
`1f
`Display Map Display At First
`Mobile Station
`
`V 108
`
`I 112
`
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`Display Location Of Selected Mobile V 114
`Station At First Mobile Station
`
`FIG. 5
`
`

`

`US 2002/0123356 Al
`
`Sep.5,2002
`
`1
`
`APPARATUS, AND ASSOCIATED METHOD, FOR
`DISPLAYING POSITIONAL DATA ASSOCIATED
`WITH MOBILE STATIONS OF A RADIO
`COMMUNICATION SYSTEM
`
`[0001] The present invention relates generally to a manner
`by which to utilize positional data, generated during opera(cid:173)
`tion of a radio communication system, such as a cellular
`communication system, of the locations at which mobile
`stations operable in the communication system are posi(cid:173)
`tioned. More particularly, the present invention relates to
`apparatus, and associated method, by which to display the
`positional data related to one or more mobile stations at a
`selected mobile station, thereby to permit the user of the
`selected mobile station better to utilize the data. The location
`at which the mobile stations are positioned are displayed
`together with a static map at a selected mobile station. The
`user of the selected mobile station is able to ascertain the
`position of the mobile station relative to the static map.
`When the position of more than one mobile station is
`displayed together with the static map, the relative positions
`of the mobile stations, in terms of the static map, are
`ascertainable by the user of the selected mobile station.
`BACKGROUND OF THE INVENTION
`[0002] A communication system is formed, at a minimum,
`of a sending station and a receiving station between which
`information is communicated. A communication channel is
`formed between the sending station and the receiving sta(cid:173)
`tion. The information to be communicated by the sending
`station to the receiving station is communicated thereon. A
`wide variety of different types of communication systems
`have been developed and are regularly utilized to effectuate
`communication of information between the sending and
`receiving stations.
`[0003] New types of communication systems have been
`developed and implemented as a result of advancements in
`communication technologies. Radio communication sys(cid:173)
`tems are exemplary of communication systems which have
`benefited from advancements in communication technolo(cid:173)
`gies. Improvements to existing types of radio communica(cid:173)
`tion systems, and new types of radio communication sys(cid:173)
`tems, have been made possible as a result of the
`advancements in communication technologies.
`[0004]
`In contrast to a wireline communication system, a
`radio communication system utilizes a radio link extending
`between the sending and receiving stations upon which to
`define a radio channel which forms the communication
`channel. The radio link upon which the radio channel is
`formed is defined, at least in part, by frequencies of the
`electromagnetic spectrum. Because a radio link is utilized to
`form the communication channel, the wireline connection,
`conventionally required in a wireline communication sys(cid:173)
`tem, and otherwise needed to interconnect the sending and
`receiving stations, is obviated. Thereby, increased commu(cid:173)
`nication mobility is inherently permitted in a radio commu(cid:173)
`nication system, in contrast to a wireline communication
`system. Infrastructure costs which would otherwise be
`required to install a wireline communication system are
`generally significantly reduced in a radio communication
`system as radio links, rather than wirelines, are utilized to
`interconnect sending and receiving stations.
`[0005] A cellular communication system is exemplary of
`
`possible as a result of advancements in communication
`technologies. A cellular communication system is a multi(cid:173)
`user communication system which provides for radio com(cid:173)
`munications with users of mobile stations when the mobile
`stations are operated within a geographical area encom(cid:173)
`passed by the network infrastructure of the communication
`system. Telephonic communication of voice, as well as
`non-voice, data is permitted in a cellular communication
`system through proper utilization of a mobile station.
`[0006] A cellular communication system makes relatively
`efficient utilization of the portion of the electromagnetic
`spectrum allocated thereto and upon which the radio chan(cid:173)
`nels are defined. The relatively efficient utilization of the
`allocated electro magnetic spectrum is provided by the
`positioning of a plurality of spaced-apart, fixed-site trans(cid:173)
`ceivers which form portions of the network infrastructure of
`the communication system. Through the use of the plurality
`of fixed-site transceivers, a mobile station is likely to be
`positioned in proximity to at least one of the transceivers.
`Only relatively low-power signals are thereby required to be
`generated, and the same frequency channels can be reused at
`different locations throughout the geographical area encom(cid:173)
`passed by the cellular communication system according to a
`cell reuse scheme.
`[0007] While the use of the cellular communication sys(cid:173)
`tem through which to communicate has many advantages,
`the mobility inherent of a mobile station operable in a
`cellular communication system does not provide for simple
`tracking of the location of the mobile station. Tracking of the
`location at which a mobile station is positioned is important,
`for instance, when a request is made for emergency assis(cid:173)
`tance.
`[0008] When a call is originated at a conventional wireline
`device, the geographical position from which the call is
`originated is easily determinable. A simple mapping of the
`identity of the wireline device at which the call is originated
`together with the location at which the device is installed
`provides some indication of the location at which the call is
`originated. A similar mapping is not possible when a call is
`originated at a mobile station due to the inherent mobility of
`the mobile station. The geographical position at which a call
`is originated by a user of a mobile station is not easily
`determinable.
`[0009] Proposals have been set forth to overcome this
`shortcoming of use of a radio communication system. One
`such proposal makes use of GPS (global positioning system)
`technologies. GPS receivers are available to receive and to
`detect TOA (time of arrival) signals generated by satellite(cid:173)
`based transmitters. Incorporation of a GPS receiver into a
`mobile station permits the location in which the mobile
`station is positioned to be determined. The network infra(cid:173)
`structure of the communication system is provided with the
`position information determined at the mobile station. That
`is to say, signals indicative of the determination can be
`communicated by the mobile station by way of a radio link,
`thereby to indicate the position in which the mobile station
`is located when a call is originated therefrom. Other pro(cid:173)
`posals have been set forth to facilitate determination of the
`location at which a mobile station is positioned utilizing
`signals communicated between the network infrastructure of
`the communication system and the mobile station.
`[0010] Generally, existing, and proposed, system require-
`
`

`

`US 2002/0123356 Al
`
`Sep.5,2002
`
`2
`
`mobile station is positioned are set forth to provide emer(cid:173)
`gency center personnel with indications of the position
`information. Utilization of this information for other uses
`would permit additional features and services to be provided
`to users of a cellular communication system.
`
`[0011] Additional manners by which to utilize positional
`information indicative of the location at which a mobile
`station operable in a radio communication system is posi(cid:173)
`tioned would be beneficial.
`
`[0012]
`It is in light of this background information related
`to positional information related to the location at which a
`mobile station operable in a cellular, or other radio, com(cid:173)
`munication system
`is positioned
`that
`the significant
`improvements of the present invention have evolved.
`
`SUMMARY OF THE INVENTION
`
`[0013] The present
`invention, accordingly, advanta(cid:173)
`geously provides apparatus, and an associated method, by
`which to utilize positional data, generated during operation
`of a radio communication system, such as a cellular com(cid:173)
`munication system of the location at which at least one
`mobile station operable in the communication system is
`positioned.
`
`[0014] Through operation of an embodiment of the present
`invention, a manner is provided by which to display posi(cid:173)
`tional data related to one or more mobile stations at a
`selected mobile station. When displayed at the selected
`mobile station, the user of the mobile station is able to utilize
`the positional data.
`
`[0015]
`In one aspect of the present invention, the location
`at which a mobile station is positioned is displayed together
`with a static map at a visual display device of a selected
`mobile station. By displaying the location at which the
`mobile station is positioned together with the static map, a
`user of the selected mobile station is provided with a visual
`indication of the location of the mobile station in terms of
`the static map.
`
`[0016]
`In another aspect of the present invention, the
`mobile station, the position of which is displayed together
`with the static map, is that of the selected mobile station.
`That is to say, in one aspect of the present invention, the
`mobile station carried by a user displays, at a visual display
`device thereof, the position of the mobile station upon a
`static map. The user of the mobile station is able to view the
`position of the mobile station and, hence, also the user, in
`terms of the static map. Subsequent movement of the user of
`the mobile station can be decided upon, responsive to
`viewing the static map and the user's position indicated
`thereon.
`
`[0017]
`In another aspect of the present invention, the
`location at which the one mobile station is positioned is
`provided to another, i.e., a second, mobile station. The
`location at which the first mobile station is positioned
`thereafter displayed at a visual display device of the second
`mobile station together with a static map. A user of the
`second mobile station is thereby able to view the display
`device, thereby to be provided with a visual indication of the
`location at which the first mobile station is positioned. The
`user of the second mobile station is able, responsive thereto,
`e.g., to provide directional instructions to the user of the first
`
`[0018]
`In another aspect of the present invention, indica(cid:173)
`tion of the locations at which a first and at least a second
`mobile station are positioned are provided to a selected
`mobile station. The selected mobile station to which the
`indications of the position of the first and second mobile
`station are provided is, for instance, one of the first and
`second mobile stations. The indications of the locations of
`the two, or more, mobile stations are displayed together with
`a static map at a visual display device of the selected mobile
`station. The static map includes a plot of the geographical
`area at which both of the at least two mobile stations are
`positioned. A user of the selected mobile station is thereby
`able to view the relative positions of the mobile station by
`viewing the visual display of the selected mobile stations at
`which the locations of the mobile two or more mobile
`stations are plotted together with the static map. When one
`of the mobile stations plotted together with the static map is
`the mobile station at which the static map is displayed, i.e.,
`the selected mobile station, the user of the mobile station is
`able to view the relative position of another mobile station
`to the position of the user in terms of the static map. The user
`of the selected mobile station, responsive thereto, is able to
`provide relative directional instructions to the user of the
`other mobile station.
`
`[0019]
`In one implementation, a manner is provided by
`which to display positional data related to a mobile station
`operable in a cellular communication system. The positional
`data of the mobile station is displayed together with a static
`map at a visual display device of a selected mobile station.
`Indications of the location at which the mobile station are
`positioned are provided to the mobile station at which the
`display is to be generated. A static map of a geographical
`area encompassing the location at which the mobile station
`is positioned is displayed at the visual display device
`together with the location at which the mobile station is
`positioned. A user of the mobile station is thereby provided
`with a visual indication of the mobile station in terms of the
`static map. The user of the mobile station is thereby better
`able to make use of the positional data regarding the mobile
`station.
`
`[0020]
`In these and other aspects, therefore, apparatus, and
`an associated method, is provided in a radio communication
`system having at least a first mobile station operable by at
`least a first user to communicate therewith by way of a
`network infrastructure. Identification of the location of at
`least a selected one of the at least first mobile station to the
`first user of the mobile station is facilitated. A position
`indication detector is coupled at least to receive indications
`of the location of the at least selected one of the at least the
`first mobile station. The position indication detector detects
`the location of the at least the selected one of the at least the
`first mobile station. A map display generator is located at the
`first mobile station. The map display generator displays at
`the first mobile station a map display. The map display
`includes a mapped area including the location at which the
`at least the selected one of the at least the first mobile station
`is positioned. A position indicator is coupled to the position
`indication detector. The position indicator indicates on the
`map display generated by map display generator the location
`of the at least the selected one of the at least the first mobile
`station. Thereby, the location of the at least the selected one
`of the at least the first mobile station is identified to the first
`
`

`

`US 2002/0123356 Al
`
`Sep.5,2002
`
`3
`
`[0021] Amore complete appreciation of the present inven(cid:173)
`tion and to the scope thereof can be obtained from the
`accompanying drawings which are briefly summarized
`below, the following detailed description of the presently(cid:173)
`preferred embodiments of the invention, and the appended
`Claims.
`
`BRIEF DESCRIPTION OF IBE DRAWING
`
`[0022] FIG. 1 illustrates a functional block diagram of a
`radio communication system in which an embodiment of the
`present invention is operable.
`
`[0023] FIG. 2 illustrates a message sequence diagram
`representative of signals generated during operation of an
`embodiment of the present invention.
`
`[0024] FIG. 3 illustrates another message sequence dia(cid:173)
`gram, similar to that shown in FIG. 2, but here illustrating
`signals generated during operation of another embodiment
`of the present invention.
`
`[0025] FIG. 4 illustrates an exemplary display generated
`during operation of an embodiment of the present invention.
`
`[0026] FIG. 5 illustrates a method flow diagram listing the
`method of operation of an embodiment of the present
`invention.
`
`DETAILED DESCRIPTION
`
`[0027] Referring first to FIG. 1, a communication system,
`shown generally at 10, provides for radio communications
`with mobile stations 12, of which two mobile stations,
`mobile station 12-1 and mobile station 12-2 are shown in the
`figure. In the exemplary implementation, the communica(cid:173)
`tion system 10 forms a cellular communication system in
`which positional information indicative of the locations at
`which the mobile stations are located are determined during
`operation of the communication system. While the follow(cid:173)
`ing description of operation of an embodiment of the present
`invention shall be described with respect to the exemplary
`implementation in which the communication system 10
`forms a cellular communication system, it should be under(cid:173)
`stood that the present invention is analogously also operable
`in other types of radio communication systems in which
`positional information, related to the locations at which
`mobile stations operable therein are positioned, is generated
`during operation of such other communication systems.
`
`[0028]
`In operation of the communication system, two(cid:173)
`way communications are permitted between a mobile station
`and network infrastructure by way of radio channels defined
`upon radio links 14 formed between the mobile stations and
`the network infrastructure. In the Figure, the radio link 14-1
`represents a radio link formed between the mobile station
`12-1 and network infrastructure. And, the radio link 14-2
`represents a radio link formed between the mobile station
`12-2 and the network infrastructure.
`
`[0029] Forward link signals generated, or otherwise sup(cid:173)
`plied, to the network infrastructure of the communication
`system are transmitted upon forward links 16 for commu(cid:173)
`nication to the mobile stations. And, reverse link signals
`generated at the mobile stations are communicated upon
`reverse links 18 to the network infrastructure. The radio link
`
`16-1 and 181. Analogously, the radio link 14-2 is shown to
`include a forward link 16-2 and a reverse link 18-2.
`[0030] The network infrastructure of the communication
`systems forms a radio access network (RAN) part of the
`communication system. Here, the network infrastructure is
`shown to include a base transceiver station (BTS) 22 which
`is operable to transceive communication signals with the
`mobile stations 12 positioned in proximity to the base
`transceiver station. In conventional manner, a base trans(cid:173)
`ceiver station defines a cell formed of a portion of the
`geographical area encompassed by the cellular communica(cid:173)
`tion system. While only a single base transceiver station is
`shown in the figure, in a typical cellular communication
`system, a large number of base transceiver stations are
`positioned at spaced-apart locations throughout a geographi(cid:173)
`cal area which is to be encompassed by the communication
`system. Each of the base transceiver stations defines a cell,
`and the cells collectively define the geographical area
`encompassed by the communication system.
`[0031] The base transceiver station is coupled to the base
`station controller (BSC) 24. The base station controller is
`operable, amongst other things, to control operation of the
`base transceiver station 22. In a typical implementation,
`several base transceiver stations are coupled to a single base
`station controller.
`[0032] The base station controller is coupled to a mobile
`switching center (MSC) 26. The mobile switching center, in
`turn, is coupled to a telephonic network, here a public(cid:173)
`switched, telephonic network (PSTN) 28. Other communi(cid:173)
`cation stations are also coupled to the telephonic network.
`Here, a correspondent node 32 is shown to be coupled to the
`telephonic network. The communication system is here
`shown also to provide for packet communications. The base
`station controller 24 is also coupled to a packet-network
`gateway 34 which, in turn, is coupled to a packet data
`network (PDN) 36, such as the internet backbone. The
`correspondent node 32 is here shown to be coupled to the
`packet data network.
`[0033] Communication paths formable between the cor(cid:173)
`respondent node 32 and a selected mobile station 12 permit
`communications to be effectuated therebetween. Packet(cid:173)
`based communications are effectuated by way of a commu(cid:173)
`nication path which includes the packet data network 36, the
`gateway 34, the base station controller 24, the base trans(cid:173)
`ceiver station 22, appropriate radio links 14 and the mobile
`station. And, circuit-switched communications are effectu(cid:173)
`ated between the correspondent node and the mobile station
`by way of the communication path, including the telephonic
`network 28, the mobile switching center 26, the base station
`controller 24, and the base transceiver station 22.
`[0034] The communication system 10 also provides for
`the determination of the locations at which the mobile
`stations 12 operable therein are positioned. Alternate, or
`complementary, manners by which to determine the posi(cid:173)
`tional information associated with the mobile stations are
`shown in the figure.
`[0035] Satellite-based stations 42 of a global positioning
`system (GPS) generate positioning signals 44 which, when
`received at appropriate circuitry of the mobile stations,
`permit calculation of the positional information.
`[0036] Alternately, or complementary to use of the posi-
`
`

`

`US 2002/0123356 Al
`
`Sep.5,2002
`
`4
`
`associated with the mobile stations, is position indication
`circuitry 46, of the network infrastructure of the communi(cid:173)
`cation system. Here, the position indication circuitry is
`shown to be located at the base transceiver station 22 of the
`network infrastructure. The position indication circuitry is
`functionally represented, and can be located elsewhere in the
`communication system. The position indication circuitry is
`operable to determine the locations at which the mobile
`stations 12 are positioned by generating and detecting sig(cid:173)
`nals communicated with the mobile station. Overhead sig(cid:173)
`naling, that is, control channel signaling is used, for
`instance, in the determinations made by the position indi(cid:173)
`cation circuitry.
`
`[0037] The mobile station 12-2 is shown to include both
`receive circuitry 48 and transmit circuitry 52 coupled to an
`antenna transducer 54. Other mobile stations, such as the
`mobile station 12-1, are analogously constructed.
`
`[0038] The receive circuitry is operable to act upon for(cid:173)
`ward link signals detected by, and converted into electrical
`form by the antenna transducer. The receive circuitry is
`coupled to a data sink 56 to which signals, operated upon by
`the receive circuitry 48 are applied subsequent to operations
`performed thereon by the receive circuitry.
`[0039] A data source 58 is coupled to the transmit circuitry
`52. The data source sources data which is operated upon by
`the transmit circuitry, thereafter to be applied to the antenna
`transducer 54 to be transduced therefrom. Data sourced at
`the data source 58 forms the informational content of the
`signals transmitted upon the reverse link 18 of a radio link
`14 formed between the mobile station and the network
`infrastructure.
`[0040] A GPS receiver 62 is also shown to form a portion
`of the mobile station. The GPS receiver is operable to
`receive and to operate upon the positioning signals 44
`generated by the satellite-based stations 42 of the global
`positioning system. Through appropriate operations per(cid:173)
`formed upon the positioning signals detected at the mobile
`station by the GPS receiver circuitry, the location at which
`the mobile station is positioned is determinable.
`
`[0041] The mobile station also includes control circuitry
`64. The control circuitry includes functional elements oper(cid:173)
`able pursuant to an embodiment of the present invention. In
`the exemplary implementation, the control circuitry includes
`processing circuitry, and the functional elements shown to
`form portions of the control circuitry comprise algorithms
`executable by the processing circuitry. In other implemen(cid:173)
`tations, the operations represented by the functional ele(cid:173)
`ments are implemented in other manners.
`[0042] The mobile station is further shown to include a
`display device 66. The display device is formed, for
`instance, of a light emitting diode display which forms a user
`display upon which data generated during operation of an
`embodiment of the present invention is displayed.
`[0043] An embodiment of the present invention displays a
`mapped area together with indications of locations at which
`one or more mobile stations are positioned. A user of the
`mobile station at which the mapped area and positional
`information is displayed is able to make use of the infor(cid:173)
`mation.
`[0044] When the positional information displayed at the
`
`mobile station used by the user, the user is provided with a
`graphical representation of the location of the user who
`carries or operates the mobile station.
`
`[0045] When the positional information displayed at the
`display device together with the mapped area is that of
`another mobile station, the user of the mobile at which the
`positional information is displayed is provided with a
`graphical representation of the location at which the other
`mobile station is positioned. Directions, or other instruc(cid:173)
`tions, can thereafter be given to the user of the other mobile
`station with knowledge of the location of the other mobile
`station.
`
`[0046] The control circuitry includes a position indication
`detector 68. The detector is coupled to the receive circuitry
`48 of the receive portion of the mobile station. Positional
`information related to one or more mobile stations trans(cid:173)
`mitted to the mobile station upon a forward link is detected
`by the position indication detector 68. The detector thereby
`detects the location at which a mobile station, is positioned.
`If information related to the locations at which two or more
`mobile stations are positioned is communicated to the
`mobile station, the detector analogously detects the location
`of the two or more mobile stations.
`
`[0047] The detector 68 is coupled to a position indicator
`72 and to a map display generator 74. The map display
`generator is operable to generate a map display including a
`mapped area encompassing the location at which the posi(cid:173)
`tion, or positions, of the mobile station, or the mobile
`stations detected by the position indication detector is or are
`positioned. The mapped area forming the map display
`generated by the generator 74 is provided to the display
`device 66 to display the mapped area thereat.
`
`[0048] The position indicator 72 is operable responsive to
`the detections made by the detector 68. The position indi(cid:173)
`cator is operable to indicate on the map display formed of
`the mapped area generated by the map display generator, the
`position of the mobile station, the positional information of
`which is detected by the detector. While the position indi(cid:173)
`cator 72 is shown to be coupled to display device 66, such
`connections functional, and, instead, the indications formed
`by the position indicator can be applied to the map display
`generator to be incorporated into the map display generated
`by the map display generator. By overlaying, or otherwise
`indicating the position of the mobile station upon the
`mapped area, a user of a mobile station viewing the display
`device is able to locate the mobile station indicated thereon
`in terms of the mapped area.
`
`[0049]
`In exemplary operation of an embodiment of the
`present invention, mobile stations containing GPS receiver
`circuitry provide determinations of the locations of the
`respective mobile stations to the transmit portions of the
`respective mobile stations. The positional information rep(cid:173)
`resentative of the determinations made by the GPS receiver
`circuitry is to transmitted upon reverse links to the network
`infrastructure of the communication system. Structure at the
`network infrastructure, such as the position indication cir(cid:173)
`cuitry 46, is selectably operable to send indications of the
`positions of selected ones of the mobile stations upon
`forward links to selected ones of the mobile stations. When
`such information is received at a mobile station, the infor(cid:173)
`mation is utilized to generate a mapped display upon which
`
`

`

`US 2002/0123356 Al
`
`Sep.5,2002
`
`5
`
`[0050] FIG. 2 illustrates a message sequence diagram,
`shown generally at 88, representative of operation of an
`embodiment of the present invention. The message sequence
`diagram is representative of operation of a system in which
`mobile stations include GPS receiver circuitry capable of
`determining the locations of the mobile stations at which the
`GPS receiver circuitry is positioned. Here, the display
`device of the mobile station 12-2 displays the indications of
`the locations at which two mobile stations, the mobile
`stations 12-1 and 12-2, are positioned in terms of a mapped
`area encompassing both of such positions.
`
`[0051] Position information related to the mobile station
`12-1, determined by the GPS receiver circuitry thereof, is
`sent upon a reverse link 18-1 to the base transceiver station
`22. Similarly, positional information associated with the
`mobile station 12-2, determined at the mobile station 12-2 is
`transmitted upon a reverse link 18-2 to the base transceiver
`station. Structure at the base transceiver station, in turn,
`generates a forward link signal for communication upon the
`forward link 16-2 to the mobile station 12-2. The signal
`generated by the base transceiver statio