Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
  • H04W88/02—Terminal devices
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
  • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
  • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
  • H04B1/40—Circuits
  • H04B1/401—Circuits for selecting or indicating operating mode
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W84/00—Network topologies
  • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
  • H04W84/04—Large scale networks; Deep hierarchical networks
  • H04W84/08—Trunked mobile radio systems

Definitions

• the present invention relates to wireless communication systems.
• SMR Specialized Mobile Radio
• the subscriber is in the unit the subscriber uses to communicate, known as the subscriber
• the limitations include a problematic electronic architectural design
• the subscriber units are unable to efficiently process the signals
• a new subscriber unit In accordance with the present invention, a new subscriber unit
• the mobile subscriber unit of the present invention is utilized.
• the mobile subscriber unit of the present invention is utilized.
• the radio unit includes a receiver, a transmitter, an input/output
• the radio unit processor means processes
• the subscriber terminal includes an input/output terminal for
• the subscriber can enter information and processor means.
• the subscriber can enter information and processor means. The subscriber
• terminal processor means controls the display and the keypad. It also controls
• Peripheral devices such as magnetic swipe devices, printers, bar code
• the subscriber unit stores all dispatch
• the memory is accessed and a list of information related to the dispatch
• the dispatch information can be used to enable the user of the
• the user selects one of the displayed dispatch activities by cursoring up and down the list and then selecting the appropriate key.
• the subscriber unit then causes a call to be made to the source of the
• the subscriber unit stores a list of one or more groups to which the
• the subscriber unit determines the group to which the dispatch is directed
• this dispatch scanning function is modified
• a priority level is assigned to each group and is
• the subscriber unit determines the subscriber unit
• the subscriber unit then does not scan for dispatches to that group, thereby
• the subscriber can program the subscriber unit to
• FIG. 1 illustrates a wireless communication system having a base
• FIG. 2 illustrates the air interface utilized by the base station
• FIG. 3 shows a block diagram of the subscriber unit, including the
• FIG. 4 illustrates an external view of the subscriber terminal
• FIG. 5 illustrates the circuitry of the subscriber terminal
• FIG. 6 illustrates the circuitry of the radio unit
• FIGS. 7 and 1 0 illustrate various screens shown on the display of the radio unit
• FIG. 8 illustrates the distribution of dispatch group information to
• FIG. 9 illustrates the steps taken by the subscriber unit upon reception
• FIG . 1 1 illustrates steps taken by the subscriber unit in implementing
• FIG. 1 2 illustrates the steps taken by the subscriber unit to perform
• FIG. 1 3 illustrates the steps taken by the subscriber unit to perform scan nuisance deletion
• FIG. 14 illustrates the steps taken by the subscriber unit to perform
• a communication system 1 is illustrated.
• system 1 includes a base station 2, a dispatch station 4 and a plurality of
• the communication system 1 may be a frequency
• TDMA systems including TDMA systems, CDMA systems and even analog based systems.
• the base station 2 includes the communication equipment necessary
• the base station 2 also serves to notify subscribers units 6 and for the dispatch station 4.
• the base station 2 also serves to notify subscribers units 6 and for the dispatch station 4.
• PSTN Public Switched Telephone Network
• the dispatch station 4 includes equipment necessary to dispatch
• the vehicle includes equipment that provides point-to-point communications.
• subscriber units 6 generally consist of mobile or portable equipment
• TCHs traffic channels
• CCH control channel
• ACH access channel
• TCHs operate in the uplink (transmissions from subscriber units 6 to the base
• the CCH and the ACH operate only in one
• channels are used to define ten uplink channels and ten 25 kHz frequency
• channels are used to define ten downlink channels. In each sector 8 to 1 0,
• nine of the frequency channels are used to implement nine downlink TCHs.
• the remaining frequency channels are used to transmit one
• the base station 2 to the subscriber unit 6 are transmitted on the CCH.
• the common air interface of FIG. 2 is
• radio unit 1 2 is divided into two pieces of equipment, a radio unit 1 2 and a
• the radio unit 1 2 transmits and receives
• the radio unit 1 as will be seen in greater detail in later discussions
• unit 1 2 performs the needed signal processing on transmit and receive
• the radio unit 1 2 also determines whether communications are being modulation.
• the radio unit 1 therefore processes the received and transmitted
• the subscriber unit 1 4 provides a keypad and display interface
• the subscriber unit 1 4 also has a processor that controls
• the display and the keypad and also processes the communication services
• the architecture of FIG. 3 is a client-server architecture wherein the
• subscriber terminal 1 4 is the client and the radio unit 1 2 is the server that
• the subscriber terminal 14 requests access to that service through the radio
• FIGS. 4 to 6 illustrate various aspects of the subscriber unit 6.
• FIG. 4 an external view of a subscriber terminal 14, which is preferably
• the subscriber terminal 1 4 includes a display 24, a keypad 26
• the keypad 26 includes five keys 30 to 34, commonly
• soft keys whose function is defined by the features shown on
• the keypad 26 also includes a plurality of
• Each of the keys 36 to 41 is positioned next to a LED display 44 which is illuminated when the function
• the handset 28 includes a numeric
• the handset 28 also has the traditional push-to-talk button found on many
• subscriber terminal 1 4 includes a microprocessor 50, an oscillator circuit 52,
• a power supply circuit 54 a serial interface circuit 56, a display driver circuit
• terminal 14 can also include a real time clock 70, however, in a preferred embodiment
• the base station 2 distributes real time clock information during
• the microprocessor 50 extracts the real time clock information
• the memory circuit 60 includes a decoder circuit 76, an address latch
• the boot ROM 80 a boot ROM 80, a flash memory 82 and a static RAM 84.
• the boot ROM 80 a boot ROM 80, a flash memory 82 and a static RAM 84.
• ROM 80 stores the code necessary to initialize the microprocessor 50 and
• memory 82 is non-volatile re-writable memory which is utilized to store
• static RAM 84 is utilized as a working memory as needed.
• the display driver circuit 58 includes the LCD display 24, a power
• the display driver circuit 58 is accessed by the
• the microprocessor 50 is responsive to the selection of the keys 30 to
• interface 94 provides communications between the subscriber terminal 1 4
• the RS-485 interface 96 and the interface circuitry 68 provides
• FIG. 6 the circuitry of the radio unit 1 2 is illustrated.
• the radio unit 1 2 is illustrated.
• 1 2 includes antennas 1 02 and 1 04, a radio board 106, a baseband unit 1 08,
• the radio unit circuitry includes a service board 1 1 0, and a GPS interface 1 1 1 .
• the radio unit circuitry includes a service board 1 1 0, and a GPS interface 1 1 1 .
• the antennas 102 and 1 04 are
• the radio board 1 06 includes transmitter and receiver circuitry. More
• the radio board 1 06 is interfaced with the baseband unit 108.
• baseband unit 1 08 includes a modem 1 26, a controller 1 28, a voice
• This baseband unit 1 08 receives the signals to be
• This baseband unit 108 also receives the signals that the radio board 1 06
• the subscriber terminal 14 has several operational modes, one of
• the microprocessor 50 causes the subscriber
• the microprocessor 50 Upon entering the dispatch mode, the microprocessor 50 preferably causes
• the second line preferably has at least seven sequentially numbered lines.
• the second line preferably has at least seven sequentially numbered lines.
• the subscriber unit 6 of the present invention allows subscribers to be any subscriber unit 6 of the present invention.
• step 200 the grouping
• the base station 2 transmits the dispatch station 4 to the base station 2 over a TCH.
• the subscriber unit 6 are preferably stored in the radio unit 12 in memory in
• controller 1 28 circuitry in step 204. It is possible for the subscriber to
• the assigned groups is stored in the controller 1 28. It is further preferred that
• the controller 1 28 will receive this transmitted information and
• the controller 1 28 in the radio unit 1 2 stores a list of the groups that a subscriber is assigned to.
• the controller 1 28 When in the scan mode, the controller 1 28
• the active group is the group which the
• the soft keys are defined as follows: the first soft key 30 (labeled
• PICK soft key 31
• the fourth soft key 33 (labeled "HIST") implements a dispatch
• LAST soft keys are selected by the subscriber, some of the background
• FIG. 9 illustrates some of the steps taken by the radio unit 1 2
• step 300 the radio terminal 1 2 determines whether the transmission is a
• the base station 2 adds control bits to transmitted communication
• the controller 1 28 processes
• the controller 1 28 compares these control bits to the
• controller 1 28 exits the processing routine of FIG 9 to perform other tasks
• step 302 the controller
• step 304 the controller 1 28
• controller 1 28 exits this process to perform other tasks. If the subscriber is not
• the controller 1 28, in step 306, causes the dispatch communication signal to
• step 308 in the subscriber terminal 1 4, the microprocessor 50
• the information stored includes the group and subgroup
• the microprocessor 50 determines whether there has been
• microprocessor 50 determines that there has been
• the microprocessor 50 exits this routine. If, however, there has been no
• step 310 to process the dispatch communication.
• step 308 is to prevent rapidly repeated dispatch communications within a
• step 31 the dispatch communication is time tagged by the
• the microprocessor 50 can time tag the dispatch either
• step 1 After the time tagging, in step 2:
• the microprocessor 50 stores information associated with the dispatch communication in the static RAM 84.
• the stored information 'nciudes the
• the subscriber can access
• the microprocessor 50 preferably causes the
• microprocessor 50 causes the screen illustrated in FIG. 1 0 to be shown on
• HISTORY indicates that the subscriber terminal 14 is in the history mode.
• the displayed information includes the group
• the subgroup can be
• the subscriber can access the last ten
• the microprocessor 50 causes this information to be displayed by
• driver circuit 58 Referring to FIG . 1 0, it can be seen that the subscriber can
• unit 1 6 were directed to a variety of groups at a variety of times.
• the display indicates to the subscriber that
• terminal 22 can scroll up and down the displayed listing of dispatch
• terminal 1 4 of the present invention also enables the subscriber to make a
• PTT Push-to-Talk
• microprocessor 50 which then causes a main screen to be displayed as well as causing the transmission to occur, as described in the following. Upon recognition of the selection of the PTT button, the microprocessor 50
• controller 1 28 formats a communication signal to be directed to
• 1 2a is the active group and 3c is the last group. If a subscriber selects the
• the microprocessor 50 maintains the
• the microprocessor 50 in
• step 350 senses the selection of the LAST softkey and then, in step 352, causes the active group and the last active group stored in the memory 84 to be toggled .
• the microprocessor 50 also causes the groups shown in the
• steps 354 to 364 illustrate the other steps
• step 354 the microprocessor 50 determines when a dispatch is
• step 356 the microprocessor 50
• the microprocessor 50 causes the group to which the incoming
• PICK softkey is not selected.
• step 360 the microprocessor
• the microprocessor 50 senses the selection in step 362. Then in step 364, the microprocessor 50 causes the active group to be changed
• the previously active group As an example, if the active group was 9, the
• step 364 the microprocessor 50 changes the active group
• the radio unit 1 2 to implement the priority scan function are illustrated.
• step 400 the controller 1 28 determines whether a received signal is a
• controller 1 28 performs other
• controller 1 28 determines in step 402 the group to which the dispatch communication directed by accessing the control information associated with the
• step 404 the controller 1 28 accesses its memory to
• the controller 1 28 goes on to perform other functions.
• the controller 1 28 checks to see if the scan function is enabled.
• step 406 determines whether there is a prior
• the subscriber selects priority scan from the subscriber terminal 14 by
• the subscriber will be given the option of enabling or disabling priority scan.
• the subscriber terminal 1 4 transmits control signals to the radio unit 1 2 that
• radio unit 1 If priority scan is enabled, as part of the setup, the subscriber
• the dispatcher can assign a priority level to the group and
• controller 1 in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in any event, the controller 1 28, in
• controller 1 28 performs other tasks. If, however, priority
• step 41 the controller 1 28 accesses the
• step 440 the controller 1 28 determines whether the
• this function is enabled or disabled by the subscriber during the setup mode. As before, the subscriber enters the setup mode.
• the subscriber will be prompted to either enable or disable the scan nuisance function. If the scan nuisance function is enabled, the subscriber
• the subscriber terminal 1 4 transmits control
• delete function is enabled or disabled and if enabled, which group or groups
• the controller 1 28 receives this information and, in step 442, determines
• step 444 the determination of which group or groups to delete from the scan list.
• controller 1 28 determines the length of time the group or groups shall be
• step 446 in a preferred embodiment, the controller 1 28
• step 448 the controller 1 28 causes the group or groups
• step 450 the controller 1 28, after
• the controller 1 28 checks the priority of each o f the groups selected for tempora- / deletion
• step 460 the
• controller 1 28 determines whether the time scan disable function is enabled
• This function is preferably enabled or disabled by the subscriber
• step 462 This information is transmitted to the controller 128 so
• controller 1 28 can determine the length of time that the scanning
• step 464 asks the subscriber for a password .
• password is preferably set by the dispatcher from the dispatch station
• the subscriber terminal 1 4 determines that the subscriber is not authorized to
• microprocessor 50 transmits the instruction to the controller 1 28 to stop the
• step 466 the controller 1 28, when it receives the instruction from
• the microprocessor 50 stops scanning the previously described list of
• microprocessor 50 is the disabling time selected by the subscriber.
• controller 1 28 keeps the scanning function disable for the selected length of

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Mobile Radio Communication Systems (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=11067194

Family Applications (1)

Country Status (6)

Citations (8)

Family Cites Families (3)

• 1995
  • 1995-03-07 IL IL11292795A patent/IL112927A/en not_active IP Right Cessation
• 1996
  • 1996-03-07 AU AU53599/96A patent/AU5359996A/en not_active Abandoned
  • 1996-03-07 WO PCT/US1996/003188 patent/WO1996027950A1/en not_active Application Discontinuation
  • 1996-03-07 KR KR1019970706177A patent/KR19980702770A/ko not_active Application Discontinuation
  • 1996-03-07 EP EP96910391A patent/EP0813771A4/en not_active Withdrawn
  • 1996-03-07 CA CA002214781A patent/CA2214781A1/en not_active Abandoned

Patent Citations (8)

Non-Patent Citations (1)

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