Paging method and apparatus
Abstract
(57) [Summary] The bidirectional paging system utilizes four local frequencies for transmission between the pager unit (22) and the central control station (20). First frequency (f1) Carries the local clock and the second local frequency (f)2) Carries a communication packet from the central control station to the paging unit and carries a third local frequency (f).3) Carries a communication packet from the pager unit to the central control station and carries a fourth local frequency (f).4) Transports the status or request signal from the paging unit (22) to the central control station (20). Fourth local frequency (f4) Follows a time-division slot allocation between pager units accessing the central control station (20). Multiple central control stations (420xFor a two-way paging system that manages multiple corresponding cells, a total of eight frequencies are used within any one cell. Four of the frequencies used are local frequencies (which may vary from cell to cell).1~ f4), And the remaining four frequencies used are the lower power common frequencies, or switching frequencies, used to switch, or hand off, the pager unit (422) moving from one cell to another. (C1~ C4).
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Projected expiry passed 15 June 2015, 11.3 years ago.
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- 1【特許請求の範囲】 1.中央制御局と、ページングユニットとを含むページングシステムを動作さ せる方法であって、該方法は、 第1の周波数で、クロック合わせ信号を該中央制御局から該ページングユニッ トに送信することと、 第2の周波数で、ページャコマンドおよび英数字データを該中央制御局から該 ページングユニットに送信することと、 第3の周波数で、該ページャコマンドに応答して、英数字データを該ページン グユニットから該中央制御局に送信することと、 第4の周波数で、ページャ送信リクエスト信号を該ページングユニットから該 中央制御局に送信することと を含んでおり、 該ページャ送信リクエスト信号は該ページングユニットに割り当てられた所定 のタイムスロットで送信され、該所定のタイムスロットは該クロック合わせ信号 に関連して割り当てられており、それによって該第4の周波数がその他複数のペ ージングユニットによって利用可能とされ、 該第1の周波数、該第2の周波数、該第3の周波数および該第4の周波数が互 いに異なる、方法。 2.ページングユニットが制御局との無線通信を獲得する、ページングシステ ムを動作させる方法であって、該方法は、 クロック合わせ信号を該制御局から送信することと、 該クロック合わせ信号を用いて、該ページングユニットのクロックと該クロッ ク合わせ信号とを合わせることと、 局識別情報を含む局識別メッセージを該制御局から送信することと、 該ページングユニットで受信された該局識別情報が変化したか否かを決定する ことと、 該変化が決定された場合には、 該ページングユニットにおいて、局切り替えリクエスト信号を生成するステッ プであって、該クロック合わせ信号に従って時分割された複数のスロットを含む 1フレームの情報を生成することと、該複数のタイムスロットのうちの1つを該 ページングユニットと少なくとも一時的に関連づけられるタイムスロットとして 選択することとを含むステップと、 該局切り替えリクエスト信号を該制御局において受信し、かつそれに応答して 該制御局から許可メッセージを送信するステップであって、該許可メッセージが さらなる通信への該ページングユニットの参加を許可するステップと、 該許可メッセージの受信に応答して、該ページングユニットのページャ識別情 報を含むページングユニット識別メッセージを送信するステップと、 該制御局から該ページングユニットに1セットのローカル周波数をダウンロー ドすることによって、該ページングユニットと該制御局との間のさらなる通信を 行うステップと を実行することと を含んでいる、方法。 3.前記制御局が、第1の共通周波数、第2の共通周波数、第3の共通周波数 および第4の共通周波数でメッセージを送信および/または受信し、該制御局か らの前記クロック合わせ信号が該第1の共通周波数で送信され、前記局識別メッ セージが該第2の共通周波数で送信され、前記局切り替えリクエスト信号が該第 4の共通周波数で送信され、かつ、前記許可メッセージが該第3の共通周波数で 送信される、請求項2に記載の方法。 4.前記送信許可メッセージは、前記クロック合わせ信号に従って、前記局切 り替えリクエスト信号と同じ時分割された複数のスロットを含む1フレームの情 報を含んでおり、該情報は、該局切り替えリクエスト信号と同じタイムスロット に格納される、請求項2に記載の方法。 5.前記ページングユニット識別メッセージの受信に応答して、前記制御局が 、 該ページングユニット識別メッセージに含まれている前記ページャ識別情報が有 効であるかどうかを判定する、請求項2に記載の方法。 6.ローカルクロック合わせ信号を前記中央制御局から前記ページングユニッ トに送信するために第1のローカル周波数が用いられ、ページャコマンドおよび 英数字データを該中央制御局から該ページングユニットに送信するために第2の ローカル周波数が用いられ、英数字データを該ページングユニットから該中央制 御局に送信するために第3のローカル周波数が用いられ、かつ、送信リクエスト 信号を該ページングユニットから該中央制御局に送信するために第4のローカル 周波数が用いられる、請求項2に記載の方法。 7.前記送信リクエスト信号は前記ページングユニットに割り当てられた所定 のタイムスロットで送信され、該所定のタイムスロットは前記ローカルクロック 合わせ信号に関連して割り当てられており、それによって、前記第4のローカル 周波数がその他複数のページングユニットによって利用可能となる、請求項6に 記載の方法。 8.前記第1のローカル周波数、前記第2のローカル周波数、前記第3のロー カル周波数および前記第4のローカル周波数が互いに異なる、請求項2に記載の 方法。 9.制御局を用いて無線通信を獲得できる双方向ページングユニットであって 、 該制御局によって送信される、クロック変調された第1の周波数を受信する第 1の受信機と、 クロッキングユニットと、該クロッキングユニットを該クロック変調された第 1の周波数に合わせるクロック合わせ回路と、 第2の周波数を受信する第2の受信機であって、該第2の周波数が少なくとも 間欠的に変調されることによって、該制御局を識別する局識別情報を含める、第 2の受信機と、 プロセッサであって、該プロセッサによって受信された局識別情報が変化して いるかどうかを決定し、かつ、該変化が決定されると、局切り替えリクエスト信 号を生成するプロセッサであって、該局切り替えリクエスト信号が、該クロック 変調された第1の周波数に関連する複数の時分割されたスロットを含んでいる1 フレームの情報を含んでおり、該複数のタイムスロットの1つが、タイムスロッ トとして該プロセッサによって選択されて、該ページングユニットと少なくとも 一時的に関連づけられる、プロセッサと、 該局切り替えリクエスト信号を該制御局に送信する送信機と を備えている、双方向ページングユニット。 10.前記プロセッサは、送信許可メッセージの受信をさらに検出し、かつ、 該検出に応答してページングユニット識別メッセージを送信させる、請求項9に 記載の装置。 11.前記送信許可メッセージは、前記局切り替えリクエスト信号と同じ複数 の時分割されたスロットを含む1フレームの情報を有するものとして検出され、 該情報は、該局切り替えリクエスト信号と同じタイムスロット内に格納される、 請求項10に記載の装置。 12.前記ページングユニット識別メッセージを送信する送信機をさらに備え ている、請求項10に記載の装置。 13.前記ページングユニットは、該ページングユニットと前記制御局との間 のさらなる通信に用いられる、ダウンロードされた1セットのローカル周波数を 該制御局から受信する、請求項9に記載の装置。 14.双方向ページングユニットと通信する制御局であって、 第1のクロック信号を少なくとも生成するクロックユニットと、 該ページングユニットから局切り替えリクエスト信号を受信する第1の受信機 であって、該局切り替えリクエスト信号が、該第1のクロック信号に関連する複 数の時分割されたスロットを含んでいる1フレームの情報を含んでおり、該複数 のタイムスロットの1つが該ページングユニットによって選択され、該ページン グユニットが、少なくとも一時的に該ページングユニットを該選択されたタイム スロットに関連づける働きをする情報をもっている、第1の受信機と、 ページングユニット送信許可信号を作成するプロセッサであって、該ページン グユニット送信許可信号は、該局切り替えリクエスト信号と同じ複数の時分割さ れたスロットを含む1フレームの情報と、該局切り替えリクエスト信号と同じ該 複数のタイムスロット中の選択された同じ1つのタイムスロットにおける情報と を含んでいる、プロセッサと、 該ページングユニット送信許可信号を送信する送信機と を備えている、制御局。 15.前記制御局の前記プロセッサは、前記ページングユニットと該制御局と の間のさらなる通信に用いられる1セットのローカル周波数をダウンロードする ローカル周波数ダウンロードメッセージを生成し、前記送信機が該ローカル周波 数ダウンロードメッセージを送信する、請求項14に記載の装置。 16.前記クロックユニットは、ローカルクロッキング信号として用いられる 第2のクロッキング信号を生成し、該ローカルクロッキング信号は、前記複数の ローカル周波数の第1の周波数で送信される、請求項15に記載の装置。 17.ローカルクロック合わせ信号を前記中央制御局から前記ページングユニ ットに送信するために第1のローカル周波数が用いられ、ページャコマンドおよ び英数字データを該中央制御局から該ページングユニットに送信するために第2 のローカル周波数が用いられ、英数字データを該ページングユニットから該中央 制御局に送信するために第3のローカル周波数が用いられ、送信リクエスト信号 を該ページングユニットから該中央制御局に送信するために第4のローカル周波 数が用いられ、該送信リクエスト信号は該ページングユニットに割り当てられた 所定のタイムスロットで送信され、該所定のタイムスロットは該ローカルクロッ ク合わせ信号に関連して割り当てられており、それによって、該第4のローカル 周波数がその他複数のページングユニットによって利用可能となる、請求項14 に記載の装置。 18.前記制御局の前記プロセッサは、前記ページングユニットと該制御局と の間のさらなる通信に用いられる1セットのローカル周波数をダウンロードする スロット割り当てメッセージを生成し、前記送信機が前記ローカル周波数ダウン ロードメッセージを送信する、請求項17に記載の装置。 19.前記ページングユニット送信許可信号に応答して、前記制御局が、ペー ジングユニット識別情報を含んでいるページングユニット識別メッセージを受信 し、前記プロセッサが、該ページングユニット識別情報が有効であるか否かを決 定する、請求項14に記載の装置。 20.ページングユニットと通信する制御局であって、 1セットのローカル周波数を、該制御局に関連づけられたセル領域に送信する 第1の送信機と、 1セットの切り替え信号周波数を、該制御局に関連づけられた切り替え領域に 送信する第2の送信機と、 ローカルクロック信号および切り替えクロック信号を生成するクロックユニッ トと、 メッセージ情報および切り替え情報を生成するプロセッサと を備えている制御局であって、 該複数のローカル周波数の第1の周波数が、該ローカルクロック信号を搬送す るように変調され、該複数のローカル周波数の第2の周波数が、該メッセージ情 報を搬送するように変調され、該複数の切り替え信号周波数の第1の周波数が、 該切り替えクロック信号を搬送するように変調され、かつ該複数の切り替え信号 周波数の第2の周波数が、該切り替え情報を搬送するように変調される、制御局 。 21.前記第1の送信機が、前記第2の送信機よりも大きな電力で動作する、 請求項20に記載の装置。 22.前記セル領域が、前記切り替え領域よりも大きな地理的範囲を有してい る、請求項20に記載の装置。 23.前記ページングユニットから局切り替えリクエスト信号を受信する第1 の受信機であって、該局切り替えリクエスト信号が、切り替えクロック信号に関 連する複数の時分割されたスロットを含んでいる1フレームの情報を含んでおり 、該複数のタイムスロットの1つが該ページングユニットによって選択され、該 ページングユニットが、少なくとも一時的に該ページングユニットを該選択され たタイムスロットに関連づける働きをする情報をもっている、第1の受信機をさ らに備えている装置であって、 前記プロセッサが、ページングユニット送信許可信号を作成し、該ページング ユニット送信許可信号が、該局切り替えリクエスト信号と同じ複数の時分割され たスロットを含む1フレームの情報と、該局切り替えリクエスト信号と同じ該複 数のタイムスロット中の選択された同じ1つのタイムスロットにおける情報とを 含んでおり、 前記第1の送信機が、前記ページングユニット送信許可信号を送信する、請求 項20に記載の装置。 24.前記制御局の前記プロセッサは、前記ページングユニットと該制御局と の間のさらなる通信に用いられる1セットのローカル周波数をダウンロードする ローカル周波数ダウンロードメッセージを生成し、前記第1の送信機が該ローカ ル周波数ダウンロードメッセージを送信する、請求項23に記載の装置。 25.ページャコマンドおよび英数字データを前記中央制御局から前記ページ ングユニットに送信するために前記複数のローカル周波数の第2のローカル周波 数が用いられ、英数字データを該ページングユニットから該中央制御局に送信す るために該複数のローカル周波数の第3のローカル周波数が用いられ、送信リク エスト信号を該ページングユニットから該中央制御局に送信するために該複数の ローカル周波数の第4のローカル周波数が用いられ、該送信リクエスト信号が該 ページングユニットに割り当てられた所定のタイムスロットで送信され、該所定 のタイムスロットが前記ローカルクロック信号に関連して割り当てられており、 それによって、該複数のローカル周波数の該第4のローカル周波数がその他複数 のページングユニットによって利用可能となる、請求項23に記載の装置。 26.前記ページングユニット送信許可信号に応答して、前記制御局が、ペー ジングユニット識別情報を含んでいるページングユニット識別メッセージを受信 し、前記プロセッサが、該ページングユニット識別情報が有効であるか否かを決 定する、請求項25に記載の装置。
2 paragraphs, as filed
Description: TECHNICAL FIELD [Detailed description of the invention]
Paging method and equipment background 1. Field of invention The present invention relates to communication paging. Specifically, the bidirectional paging method and And equipment. 2. Related technologies and other considerations Over the last few decades, pagers have contacted remote people. Turned out to be an important communication device for. Early pagers were mainly audio and And / or supplied only vibration output, but more recent pagers, for example, It enhances the output capacity like an alphanumeric display including a sage. The paging system has conventionally been a one-way system. That is, the user Receive a paging message from the central terminal, but use the pager to do that message There was no way to respond to the page. Providing two-way communication capabilities for pagers Some of the prior art attempts have been to call the pager (eg, mobile radiotelephone). Efforts to connect to were included. For example, the US special granted to Bhagat et al. Xu RE33,417 (The entire wireless pager and wireless telephone can be connected through an automatic dialer. US Pat. No. 5,117 granted to Metroka et al. , 449 (Paging and cellular radiotelephone functions combined in a single unit See). Some pagers give an acknowledge or response to the paging signal Some have the ability. In such an "acback" system When the user is paged, the response input device (eg, toggle switch, Operate the pushbutton switch or keyboard). Typically like this Acback system with many frequencies or many frequency subbands Accompanied by complex acknowledge transmission schemes. Pager to different central stations Yo While moving between different geographic areas or "cells" managed by Pager handoffs are technically awkward when accompanied by a plethora of frequencies It will be something like that. Abstract A bidirectional paging system is a transmission between the pager unit and the central control station. For this, we use four local frequencies. The first local frequency is local Carrying the clock, the second local frequency is the paging unit from the central control station. The communication packet is carried to the terminal, and the third local frequency is from the pager unit to the middle. The communication packet is carried to the central control station, and the fourth local frequency is the paging unit. Transport status or request signals from G to the central control station. 4 loca Frequency-based transmission is between pager units accessing the central control station Follows the time-division slot allocation of. A bidirectional paging system in which multiple central control stations manage multiple corresponding cells. For the stem, a total of eight frequencies are used within any one cell. Ri Four of the frequencies used are local frequencies (which may vary from cell to cell). Yes, the remaining four frequencies used are moving from one cell to another More power used for switching or handoff pager units Low common frequency, i.e. switching frequency. A brief description of the drawing The above-mentioned object, feature and effect of the present invention, and other object, feature and effect. Is a more detailed description of the preferred embodiments illustrated in the accompanying drawings below. It will be clear from the explanation. In drawings, the same reference number refers to all drawings. And point to the same part. The drawings do not necessarily correspond to the actual scale. However, there are some points that are emphasized in the explanation of the principle of the present invention. FIG. 1 shows a central control included in a paging system according to an embodiment of the present invention. It is a schematic diagram of a station. Figure 2 shows the paging system contained within the paging system used with the central control station of Figure 1. It is a schematic diagram of a gear unit. FIG. 3 is a flowchart showing each step performed by the central control station of FIG. Is. Figure 4 shows each step performed by the pager unit in Figure 2 in transmit mode. It is a flowchart which shows. Figure 5 shows each step performed by the pager unit in Figure 2 in receive mode. It is a flowchart which shows. FIG. 6 reflects the communication between the central control station of FIG. 1 and the pager unit of FIG. It is an iming diagram. FIG. 7 shows the center included in the paging system according to the second embodiment of the present invention. It is a schematic diagram of a control station. Figure 8 shows the paging system contained within the paging system used with the central control station of Figure 7. It is a schematic diagram of a gear unit. FIG. 9 shows the switching operation of the paging system according to the second embodiment of the present invention. It is a hybrid schematic diagram and a timing diagram to represent. FIG. 10 is executed by the pager unit of FIG. 8 as the channel switching operation is performed. It is a flowchart which shows each step to be performed. FIG. 11 is executed by the central control station of FIG. 7 with the channel switching operation. It is a flowchart which shows each step. FIG. 12 shows the format of the communication packet used in each embodiment of the present invention. It is a schematic diagram. FIG. 13 is a schematic diagram illustrating a time-division slot allocation technique according to the present invention. is there. Detailed description of the drawing FIG. 1 shows the central control station 20 according to the first embodiment of the present invention, and FIG. 2 shows the central control. A page unit 22 suitable for use with station 20 is shown. As shown in FIG. 1, the central control station 20 has a central computer 30 and a transmitter 3. 2, receiver 34, and computerized telephone answering system 36 I have. The transmitter 32 has two local frequencies, that is, via the transmitting antenna 42. I, frequency f<sub>1</sub>And frequency f<sub>2</sub>And send. Receiver 34 has two local frequencies, That is, the frequency f<sub>3</sub>And frequency f<sub>4</sub>Connected to receiver antenna 44 to receive ing. The computerized telephone answering system 36 is a bank of telephones 48 It is connected to the. The central computer 30 of the central control station 20 has a CPU 50, an I / O interface 52, and a display. Includes a conventional computer with typical components, including the Mori 54. Figure Memory 54 is (for example) a hard disk, although only schematically shown in 1. Equipped with several memory elements (not shown) including drive, RAM, and ROM Please understand that. Figure 1 shows the memory 54 (among others) pager resist. It stores the application file 55 and the pager directory file 56. Shown. Pager files 55 and 56 are typically central computer 30 It is stored on the hard disk drive of It can be loaded into the RAM section of the 54. The central computer 30 of the central control station 20 (to encode the output communication information, With encoder 58 (connected between I / O interface 52 and transmitter 32) (Received to decrypt input communication information from one or more pager units 22 Further equipped with a decoder 57 (connected between the machine 34 and the I / O interface 52) ing. The central control station 20 also has a local clock signal f<sub>1</sub>clk (this time frequency f<sub>1</sub>It is equipped with a clock unit 59 that produces (used to modulate). As further illustrated, the CPU 50 of the central control station 20 has a frequency f.<sub>2</sub>To transmit with Create a communication packet for. Communication parameters, as schematically illustrated in FIG. The ket is in a predetermined format and is used to identify the central control station. Knowledge of the field and the addressed (at least one) pager unit 22 A field for another, a field for the arithmetic code, and (optionally) Fields for alphanumeric information and, for example, checksums, error correction and post-un With fields for other traditional packet type information, such as bulls doing. Preambles and postambles are the beginning and end of packets A particularly selected power that can be recognized and distinguished from the data for the purpose of determining It's a turn. The alphanumeric information can be in the conventional binary 8-bit format. Figure The 12 formats are just an example. Because the order of the fields This is because information such as numbers can be changed in other embodiments. .. The central control station 20 has a plurality of pager units 22.<sub>1</sub>、22<sub>2</sub>、...22<sub>N</sub>Communicate with. However One such pager unit (collectively referred to as paging unit 22) However, although it is specifically illustrated and explained in the present specification, other than that. The configuration and operation of the adjuster unit is also explained with this one pager unit. It should be understood that the same may be true. As shown in FIG. 2, the pager unit 22 is connected to the pager receiver 62. It is equipped with a pager receiver antenna 60. How about the pager receiver 62? It is connected through the S / D converter 64 in the pager computer 70. Receiver 62 has two local frequencies f<sub>1</sub>And f<sub>2</sub>To receive. These frequencies are Transport the input communication information (details will be described later) to the pager computer 70. Is modulated for. On the communication output side, the pager computer 70 is a D / Output communication information is output to the pager transmitter 72 via the S converter 74. Transmitter 72 Two local frequencies f via pager antenna 76<sub>3</sub>And f<sub>4</sub>Output communication information To broadcast. As shown in Figure 2, the pager computer 70 is an arithmetic processor 82, Memory system 84 (with both ROM and RAM), and I / O interface It has a pager microprocessor 80 connected to each of the 86s. To. The I / O interface 86 is connected to the clock unit 87. I / O inter The face 86 also has the decoded communication information input from the 8-bit decoder 88. And the output communication information that is not encoded in the 8-bit encoder 90 It is connected so that it can be output. Decoder 88 from S / D converter 64 Connected to receive the input encoded communication information .. The encoder 90 can output the encoded output communication information to the D / S converter 74. It is connected so that it can be done. The clock unit 87 is a local clock having a frequency corresponding to its input. Signal f<sub>1</sub>It can be set by appropriate input to generate clk. Other fruits In the embodiment, the function of clock unit 87 performs a programmed execution. In use, at least in part, be feasible by microprocessor 80 I want to be understood. I / O interface 86 facilitates input and output with multiple input / output devices And also supplies on / off signals to pager transmitter 72 on line 92 It is connected so that it can be. On connected to I / O interface 86 The power / output devices are keyboard 93, beeper 94, vibrator 95, and LCD (alphanumeric). Includes display 96 and. At the time of manufacture, the pager unit 22 is stored in the memory 84 (ROM). Identification serial number (for example, a 7-digit alphanumeric pre-assigned ID number) Pre-programmed using b). Pager unit 22 (for example, purchase A given address in memory 84 of pager unit 22 (sometimes) and (central control station 20) In both pager directory files 56 (stored in memory 54) Activated by inserting a time slot assignment (discussed below) Is done. Operation of the first embodiment Communication between the central control station 20 and the pager unit 22 has four local frequencies, Especially the frequency f mentioned above<sub>1</sub>, F<sub>2</sub>, F<sub>3</sub>And f<sub>4</sub>Happens in. First frequency (f<sub>1</sub>) Is Transport the local clock matching signal from the central control station 20 to the paging unit 22 To. Second frequency (f<sub>2</sub>) Is from the central control station 20 to the paging unit 22. Carry mand and alphanumeric data. Third frequency (f<sub>3</sub>) Is a paging unit Transports pager status data and alphanumeric data from 22 to central control station 20. Fourth frequency (f<sub>4</sub>) Is from the paging unit 22 to the central control station 20. Transport the strike signal. In this embodiment, the frequency f<sub>1</sub>~ f<sub>4</sub>Is preferably f<sub>1</sub> f<sub>2</sub> f<sub>3</sub><sub></sub> f<sub>4</sub>Is selected to be. Normal non-cell switching operation as described in more detail below and as described in FIG. In the frequency f<sub>4</sub>The pager request signal at the paging unit 22 Sent within the specified time slot specified in. Frequency f<sub>4</sub>Predetermined ta Im slot is a clock matching signal (frequency f)<sub>1</sub>In connection with) And the 4th frequency is not available by multiple other paging units Is specified. For example, as shown in FIG. 13, the frequency f<sub>4</sub>First tie in Muslot is designated as pager P1 and the second time slot points to pager P2 The nth time slot is also specified in the pager Pn. This Embodiment In, the number of time slots (and therefore the number of pagers) is as large as 10,000 or more. Can be a number. Figure 3 shows the C of central control station 20 when processing communication with one or more paging units. The process performed by PU50 is shown. The process shown in FIG. 3 is the memory 5 of the central control station 20. The instruction stored in the ROM part of 4 is shown. When the central control station 20 starts up (step 100), the initialization process (step 100) Tep 102) is executed. Included in the initialization process is the activation of transmitter 32 (Transmitter 32 has two frequencies f<sub>1</sub>And f<sub>2</sub>(To be able to send in) and receiver 34 Activation (receiver 34 has two frequencies f<sub>3</sub>And f<sub>4</sub>To be able to receive). Sa In addition, frequency f<sub>1</sub>Is the local clock combination generated by the local clock 59 It is modulated to carry the signal. Then, in step 104, the page The registration file 55 and the pager directory file 56 are hard It is loaded from the disk into the RAM section of memory 54 (step 104). After initialization and loading of files 55 and 56, CPU50 gives instructions Repeat loop 106. Loop 106 has a phone message (in bank 48) Determine if one of the phones is receiving (via answering system 36) A check to do (step 108) and a pager message (pagegyu) Determine if it is being received (via transmitter 32) from one of the knits 22 Includes checks for 110). As used herein, the message is from a telephone or page From Central Bureau 20 to Pager 22 or vice versa, whether from May require multiple packets for transmission. In the discussion below, the message Sending and receiving involves sending and receiving one or more packets. In general, the message pa Ketting is invisible to the user. That is, the user sends a message Enter the message without considering the number of packets that may be needed. Me The message is typically the end character or message of a user-entered message. Ends with the delimiter. Transmitter (either Central Station 20 or Pager 22) Meets one or more packets with a format similar to the format shown in Figure 12. Assign sage. The last packet of the message contains the message end character .. Also, the packet indicates the number of continuously related packets sent by the transmitter. It may be formatted in such a way that it does (eg, the related packet series). There may be another packet field to indicate the al number). I / O interface 52 is different for CPU 50 depending on the type of message received. Due to the fact that it generates an interrupt for ip, the central computer 30 is called Receiving a message (step 108) and receiving a pager message (step 110) Can be distinguished. A telephone message has been received in step 108 If it is determined, steps 112, 114, and 116 of FIG. 3 are executed. In processing the received telephone message, in step 112, the central controller The putter 30 extracts communication information for transmission from the input data whose order has been determined in advance. To. Data entered from the phone via one touchpad on the phone in bank 48 Is customarily called a phone identifier (eg, a phone number) and a pager uni Identifier (for example, a 7-character alphanumeric pre-specified ID number and for transmission Contains any of the character data and the closing character. This transmission communication information is standard Received by central computer 30 in DTMF format. In step 114, the central computer 30 is the ID number of the called pager ( With pager registration file 55, using (obtained in step 112) Called by checking directory file 56 Determines whether or not the computer is registered in the central control station 20. Called pager registered If so, the central computer 30 was called Pager Uni in step 114. The slot specified in the file is also obtained from the pager directory file 56. In step 116, the central control station 30 communicates information to the called pager unit. To send. In this regard, the central control station 20 is the ID of the called page unit. The number and the character data received from the sending telephone of the pager unit 22 etc. Create a communication message containing and (frequency f<sub>2</sub>By) to send. Step 116 After execution, processing returns to loop 106. When it is determined in step 110 that a pager message has been received If so, even steps 132-140 of FIG. 3 are performed (before returning to loop 106). Figure 4 The sending pager unit 22 sends a message, as described below for reference. When desired, the sending pager unit 22 has a designated time slot. Frequency f<sub>4</sub>Sends a request signal. Central control station 20 is always frequency Number f<sub>4</sub>Because we are monitoring the frequency f<sub>4</sub>The request signal carried by Note even if it is from that pager unit 22. Local clock 59 With respect to CPU50 in step 132, frequency f<sub>4</sub>Riku in any time slot for Determine if the est signal is detected. In step 132 the time slot If detected, CPU50 sees pager directory file 56 in step 134. The ID number of the specific pager unit 22 that generated the request signal by judge. When the ID of the requesting pager unit 22 is known, the central control station 20 steps. 136 allows requesting pager unit 22 to send the message Yes. In particular, CPU50 has a frequency of f<sub>2</sub>Instructs to create a communication message for sending by .. The specific communication packet created in step 136 is the requesting pager. The identifier of the packet (the destination of the packet) and the requesting pager unit 22 are the data. Operation code that commands / permits sending a message ("operation" Code) and include. In step 138, the central control station 20 is the transmitting side (for example, the requesting side). Frequency f from Jaunit 22<sub>3</sub>Receive the communication message sent by. Send The communication message created and transmitted by the credit pager unit 22 is shown in Figure 12. Contains packets in a format similar to the format shown in and is a message. Includes the identifier of the pager that is finally sent and the identifier of the packet itself. Step In 138, in CPU50, the pager unit that is the final destination is the pager. Check to confirm that it is registered in Le 55 and 56 Do. At step 140, CPU50 redefines any required in the message. It also does matting and / or substitution, and the message has a frequency f<sub>2</sub>Sent in To do so. Frequency f required in step 140<sub>2</sub>Sending by is the final destination (eg For example, the identifier of the pager unit22) and the transmission are relayed from another pager unit. Includes an operation code indicating that the message is included. FIG. 4 shows the steps performed by the pager unit 22 in relation to the transmission mode. Pe FIG. 5 shows the steps performed by the gear unit 22 in relation to the reception mode. This specification In the book, the term "mode" does not exclusively refer to a particular moment. .. Because the pager unit 22 is always at frequency f<sub>1</sub>And f<sub>2</sub>Received the transmission by Because there is. Send after startup (step 200) in send mode (see Figure 4) The microprocessor 80 of the side pager unit 22 executes loop 202. Loop 2 In 02, the user's alphanumeric characters (entered via keyboard 93) are Messe. Repeatedly until the delimiter indicating the end of the page is detected (step 206). It is checked (step 204). The characters entered and fetched in step 204 are LC Displayed on D-Display 96. The delimiter is entered in step 206 The microprocessor 80 exits loop 202. By convention, messages are addressed The destination ID, including the destination ID, is directed to the message entered in step 204. Tends to be the ID of another pager unit. Transmission from keyboard 93 in step 212 after message entry Wait for command entry. If the send command was entered in step 212, The icroprocessor 80 generates a request signal and frequency f<sub>4</sub>To send by. Up As noted, the request signal was assigned to the requesting pager unit 22. Frequency f in the time slot<sub>4</sub>Is sent by. Pager unit 22 is always frequency Number f<sub>1</sub>Is receiving the local clock matching signal by The Rossessa 80 has been assigned a specific time assigned to a specific sender pager unit 22. Frequency f at the time corresponding to the slot<sub>4</sub>It is possible to send a request signal by Please note that it will be possible. Regarding the above, each pager unit 22 according to the time division technology<sub>1</sub>~22<sub>N</sub>(For example Pager P in Figure 13<sub>1</sub>~ P<sub>n</sub>) Has frequency f<sub>4</sub>Selected from N time slots One is specified. After transmitting the request signal in step 214, the pager unit 22 is centered. Wait for the transmission command from the control station 20 to be received. Send command from central control station 20 / The creation and transmission of transmission permission will be described with reference to FIG. Transmission from central control station 20 After receiving the command / transmit permission (step 216), the microprocessor 80 is shown in Figure 12. Contains one or more packets with a format very similar to the format of Create a communication message (step 218). Communication message destination ID and data The alphanumeric field of the ket is filled with the message entered during loop 202 To. In step 220, the transmitting pager unit 22 has a frequency f.<sub>3</sub>By communication Broadcast the ket. If no send command is entered in step 212, or in step 220 After sending the message, in step 222, how many microprocessors 80 Wait for an entry for at least one of the possible special features. For example, you The memory of the message (whether or not it has already been sent) [Step 228 ] May be pressed. Also, the user is a message Facilitating editing (see step 224) or erasing (see step 226) You may press the conjunction key. End the message and create for the next message To start the business, a function dedicated to the exit operation (step 230) You have to press the key. Figure 5 shows the microprocessor 8 for the pager unit 22 in receive mode. 0 indicates the process to be performed. After startup (step 302), as shown in step 304 As such, the pager unit 22 has a frequency f from the central control station 20.<sub>2</sub>Receive transmission by To do. When the complete packet is received (determined in step 306), it is in the communication packet Destination ID (see packet format in Figure 12) is the ID of the receiving pager unit 22 Is checked (step 308). Either step 306 or 308 If the determination of is NO, the pager unit 22 returns to step 304 by returning to step 304. End of communication packet (if the determination in step 306 is NO) or another communication packet (If the determination in step 308 is NO), wait for any of the receptions. Received communication packets are assigned to this particular receiving pager unit 22 If so, in step 310, the microprocessor 80 is in the communication packet. Message by reference to the operation code field (see Figure 12) Determine if the operation code indicates that the operation contains a command .. If the operation code indicates a command, the command processing routine ( Execute (enclosed by the dashed line 312 in Fig. 5). If the operation code does not indicate a command, in step 314 , The microprocessor 80 of the pager unit 22 has an alphanumeric fee for communication packets. The rud part (which forms at least one part of the message) is stored in the RAM part in the memory 84. To do. The message communicated from the central processing station 20 is for ending the message. To some communication packets (the next communication packet that supplies the continuity of the message content) The microprocessor 80 smells step 316 because it may be needed (along with the ket) Then, a check is performed to confirm that the entire message has been received. Messe If the entire page has not been received, the process will receive additional communication packets. Then, return to step 304. When the entire communication message is received, microprocessor 80 enters step 318. In, it is determined whether the pager unit 22 is in the beep mode or the vibration mode. Determine. In this regard, a dedicated switch or keyboard on the pager unit 22 Set pager unit 22 to desired mode by data entry using de 93 There are many ways to do it. Microphone if pager unit 22 is in beep mode The processor 80 provides additional signals to activate the beeper 94 on the I / O interface 86. Output the signal to be generated in (step 320). In addition, the pager unit 22 swings In dynamic mode, microprocessor 80 activates vibrator 95. Is output to the I / O interface 86 (step 322). In step 324, microprocessor 80 uses the received message. Alphanumeric message data on LCD display 96 for viewing by Instruct I / O interface 86 to send. Received alphanumeric data to the user (Beeper 94 and / or Vibrator 95) After notifying (via one of) and displaying (on LCD96), microprocessor The server 80 returns to step 304 and checks whether or not further communication packets have been received. Check. The command processing routine (enclosed by the dashed line 312 in Figure 5) begins with which particular opere. Determine if the command is commanded (step 330). This judgment is o It is based on the content of the peration code, and the content of the above operation code is , Different for different types of commands. Operation code is error If it indicates a down, the execution of the process starts from step 340. Proceed to the shutdown subroutine. Operation code changes time slot If indicated, the execution of the process is a time slot changeable starting from step 350. Proceed to Chin. Operation code requires transmitter shutdown If so, the execution of the process starts from step 360 Transmitter shutdown subroutine Proceed to. The operation code requires transmitter re-enablement If so, the execution of the process proceeds to the transmitter re-enablement routine starting with 370. If the operation code requires a clock reset, the process will be executed. Proceed to the clock reset subroutine starting with Tep 380. Regarding the error shutdown subroutine, in step 342, the microphone The processor 80 obtains the error type indication from the communication packet. Errata The ip is stored in memory 84 (step 344) and then on LCD display 96. It is displayed (step 346). Microprocessor 80 has pager unit 22 Issue a command to shut down (step 348) and shut down in step 349 Down happens. Regarding the time slot change subroutine, in step 352, the microprocessor The receiver 80 is designated as the receiving pager unit 22 from the received communication packet. Extract information that indicates a new time slot. The new time slot is Input to Mori 84 (step 354), then frequency f<sub>4</sub>Request signal sent by Used in connection with credit (until further changes are made) (eg, step in Figure 4) See page 214). Timeslot change subroutines, if desired, ( Eliminate unused time slots (for example), thereby increasing scan speed) From that, diagnostics and troubleshooting, and malfunctioning or malfunctioning equipment It may include other operations, including interrupting the service of. Regarding the transmitter shutdown subroutine, in step 362, the microphone The processor 80 issues an I / O interface 86 to issue an off-command to the transmitter 72. Instruct. Regarding the transmitter re-enablement subroutine, go to step 372. Then, the microprocessor 80 should issue an on-command to the transmitter 72. Instruct the interface 86. With respect to the clock reset subroutine, in step 382, the microp The Rossessa 80 instructs the clock 59 to set the pager unit 22. After executing step 354, 362, 372 or 382, processing execution returns to step 304 It processes further communication packets that may need to be processed. in this way, Command processing routine (dashed line 312 in Figure 5) until an error shutdown is notified After the entry (enclosed in), the loop up to step 304 is executed. Figure 6 shows, in particular, for sending a message to the destination pager unit P2. Frequency f for request by sender pager unit P1<sub>1</sub>~ f<sub>4</sub>And Fig. 3 ~ It is a timing diagram which shows the integration of the steps shown in FIG. In Figure 6, the term "co" "Computer" refers to the central control station 20. Sending pager unit P1 and destination The pager unit P2 is both the transmission mode shown in FIG. 4 and the reception mode shown in FIG. Please understand that it works on your own. Figure 6 is generally from pager unit P1 ( Sending a message to pager unit P2 (via central control station 20) and pager Confirmation message from unit P2 to pager unit P1 (via central control station 20) Sending a page and a confirmation message from pager unit P1 to pager unit P2 Message from pager unit P1 to central control station 20 Indicates transmission. Structure of the second embodiment FIG. 7 shows the central control station 420 according to the second embodiment of the present invention. Figure 8 shows the central system Shown is a pager unit 422 suitable for use with your station 420. Figure 9 shows a wide area paging system including multiple central control stations S1 to S8 (each central system). (Same as station 20), and each central control station S1 to S8 is preferably in each cell. Geographically central. Each central control station S1 ~ S8 has its own local frequency , 1 set of common or switching frequency C<sub>1</sub>~ C<sub>4</sub>And broadcast. Common Frequency C<sub>1</sub>~ C<sub>4</sub>Has a relatively narrow range or common frequency around the central control station Compare as it only happens in the receive area (CFRR) [also called the "switching area"] Broadcast with low power. Local frequencies are received virtually throughout the cell Believe it or not, it will be broadcast with much higher power. For example, Figure 9 In, the central control station S1 has a relatively low power common frequency C.<sub>1</sub>~ C<sub>4</sub>CFRR<sub>1</sub>Broad Cast and relatively high power local frequency f<sub>1</sub>~ f<sub>4</sub>CELL<sub>1</sub>Broadcast to To do. Central control station S2 has a relatively low power common frequency C<sub>1</sub>~ C<sub>4</sub>CFRR<sub>2</sub>Broad car Strike and relatively high power local frequency f<sub>5</sub>~ f<sub>8</sub>CELL<sub>2</sub>Broadcast to .. This is also CELL, as shown in Figure 9.<sub>1</sub>And CELL<sub>2</sub>Overlaps in the overlapping area shown in FIG. Station S1 is a set of local frequencies f<sub>1</sub>~ f<sub>4</sub>Using station S2, another set of loca Frequency f<sub>5</sub>~ f<sub>8</sub>To use. Stations S1 and S2 are common or switched in the same set Frequency C<sub>1</sub>~ C<sub>4</sub>To use. In this way, each central control station utilizes two sets of frequencies. Since each set has 4 frequencies, a total of 8 frequencies are handled for each station. As described above, the second embodiment of the present invention is a plurality of central control stations 420.<sub>x, y = 1,2, ... M</sub><sub></sub>Suitable for systems with. Each central control station 420<sub>x</sub>Is the relevant geographic range In the cell, one set of local frequencies f<sub>L1</sub>, F<sub>L2</sub>, F<sub>L3</sub>, And f<sub>L4</sub>Common with Or switching frequency C<sub>1</sub>, C<sub>2</sub>, C<sub>3</sub>, And C<sub>4</sub>And send and receive. Local frequency f<sub>L</sub><sub>1</sub>, F<sub>L2</sub>, F<sub>L3</sub>, And f<sub>L4</sub>The value of varies from cell to cell (eg, different central control stations 42). 0<sub>x</sub>Different for), but common or switching frequency C<sub>1</sub>, C<sub>2</sub>, C<sub>3</sub>, And C<sub>4</sub>The value of the Throughout the system (eg, all central control stations 420)<sub>x</sub>Is uniform. Although not shown in Figure 9, the central control station pattern is at the paging system. It should be understood that it repeats in all directions as well, depending on a given geographical boundary. Furthermore, although not specifically shown in FIG. 9, each central control station 420 has an associated CFRR. Please understand that. Common or switching frequency C<sub>1</sub>~ C<sub>4</sub>Each corresponds to the local frequency f<sub>1</sub>~ f<sub>4</sub>Against And has a similar function. In this regard, frequency C<sub>1</sub>Is the central control station (singular or also Carry the clock frequency transmitted by (plural), but the common frequency C<sub>1</sub>Croc Crate preferably varies between central control stations. Frequency C<sub>2</sub>Is the central control station (singular or also Is used to send information from the pager unit (s) to the pager unit (s) And frequency C<sub>3</sub>Is used to send information from the pager unit to the central control station And frequency C<sub>4</sub>Is used by the pager unit to generate the request signal You can stay. Frequency C<sub>2</sub>Has a format similar to the format shown in FIG. Transport the ket. Frequency C<sub>2</sub>Packets carried by the frequency f<sub>2</sub>Similar to The expression may have a command code. C<sub>2</sub>The command code is SYSTEM COM MAND CODE, LOCAL FREQUENCY DOWNLOAD COMMAND CODE, SLOT RECOGNITION COMMA Includes ND CODE and SLOT ASSIGNMENT COMMAND CODE. As shown in FIG. 7, the central control station 420 is similar to the central control station 20 of the embodiment of FIG. (Similar components are given the same reference code for brevity). But the center The control station 420 has a common frequency C.<sub>1</sub>And C<sub>2</sub>With common frequency transmitter 432 for transmitting By including an additional transmitter known as, along with the common frequency transmit antenna 442. Will be supplemented. In contrast to the high power transmitter 32, the transmitter 432 is a low power transmitter. .. Further, the central control station 420 has a common frequency C.<sub>3</sub>And C<sub>4</sub>Common lap for sending An additional receiver known as wavenumber receiver 434 is shared with the common frequency receiver antenna 444. It is supplemented by including in. The central control station 420 in FIG. 7 has two clock signals, in other words, the first or low. Cal clock signal f<sub>L</sub>clk and the second ie common clock signal C<sub>1</sub>Clk and generate Includes lock unit 59'. Local clock signal f<sub>L</sub>clk is the frequency f<sub>1</sub>Modulate The common clock signal used for is frequency C<sub>1</sub>Is used to modulate. Central control station 420<sub>x</sub>Central computer 30 has output line 486A and input line 486B They are connected in series. In particular, although not explicitly shown in Figure 7, the compute in Figure 7 The data 30 (similar to that in Figure 1) is the I / O interface to which the series connection lines 486A and 486B are connected. Includes face. The series connection lines 486A and 486B are, for example, pager resist trays. Updated the contents of session file 55 and pager directory file 56 Used to do. As shown in FIG. 8, the pager unit 422 is the pager unit of the embodiment of FIG. Similar to G22 (again, for brevity, the same reference to similar components Signed). However, the pager unit 422 (in a similar fashion to the central control station 420) ), Common frequency C<sub>3</sub>And C<sub>4</sub>Known as the Common Frequency Transmitter 572 for transmitting Additional transmitters are augmented by including with the common frequency transmit antenna 576. Is done. Further, the central control station 420 has a common frequency C.<sub>1</sub>And C<sub>2</sub>To receive A further receiver known as the frequency receiver 434, the common frequency receiver antenna 444 It is supplemented by including with. The operating frequencies of the transmitter 72 and receiver 62 are "frequency control" from computer 70. It is variable depending on the value transmitted over the line. In particular, the frequency control line is Compu It is connected to the I / O interface 86 in the data 70. I'll elaborate below So when the pager unit 422 moves to the new CFRR, the pager unit 422 The new C to which the pager unit 422 moves from the local frequency of the old cell Frequency control line to switch to the local frequency of the new cell associated with the FRR Is given a signal. The pager 422 is a local clock signal f used by the microprocessor 80.<sub>L</sub>with clk Common clock signal f<sub>c1</sub>Clock unit 83'that can generate clk and separately including. Each of these clock signals is properly input to the clock unit 83'. As a result, these clock signals are initialized and the circumference of these clock signals is The wave number is set. Figure 8 also shows that the pager unit 422 has an alphanumeric and graphic display and a pressure sensitive device. Shown to have a data I / O unit 596 with both an iting pad. Alphanumeric and graphic display is a dot that can display characters and graphics It is a matrix device. The writing pad has a 16x48 dot area .. Operation of the second embodiment As shown in FIG. 9, the pager unit P1 is CELL.<sub>1</sub>Works within and is already station S1 Common frequency C<sub>1</sub>~ C<sub>4</sub>And local frequency f<sub>1</sub>~ f<sub>2</sub>Is considered to have been received. Pe -Ja unit P1 moves on the route indicated by the dashed line ROUTE with an arrow. Pageyayu Knit P1 is used when moving along an area where cells overlap when moving along a ROUTE. Even the local frequency f<sub>1</sub>~ f<sub>2</sub>Continues to work with. But the pager unit P1 is the new common frequency receive area (ie CFRR<sub>2</sub>), Switch or Handoff operation occurs. In the switching operation, as described in more detail below In addition, the pager unit P1 has a common frequency C from the central control station S2.<sub>1</sub>~ C<sub>4</sub>And that As a result, CELL<sub>1</sub>Local frequency f<sub>1</sub>~ f<sub>4</sub>, CELL<sub>2</sub>Local frequency f<sub>5</sub>~ f<sub>8</sub>Switch to Can be obtained. Pager to perform switch or handoff operation Unit P1 executes the channel switching routine, and central control station S2 switches energy. Execute the table routine. Page on channel switching routines and switching enable routines Unit P1 is CFRR<sub>2</sub>When you move to, the pager unit P1 is clocked from station S2. No. frequency C<sub>1</sub>Received by. At this time, the pager unit P1 automatically clicks. Match the lock unit to the clock signal from station S2. Channel executed by pager P1 following startup (step 500) According to the switchover routine, in step 506, the pager unit P1 is station S. Obtain information that characterizes the system centered on 2. Such characterization information Is called a system identifier or system ID information. In step 508, the microprocessor 80 of the pager unit P1 has a frequency. Number C<sub>2</sub>Check to determine if there is new system ID information obtained by Do the That is, in the microprocessor 80, the system ID information is frequency C.<sub>2</sub>By Check to determine if it is received (it can only happen within CFRR) Yes, if frequency C<sub>2</sub>If received by, the system ID information and the system stored immediately before Compare with system ID information. Previously obtained system ID and most recently obtained system If the stem ID is the same, the pager unit P1 is still the pager unit P1. Recognize that they are under the jurisdiction of the same station (eg station S1). Previously obtained If the stem ID and the most recently obtained system ID are not the same, the pager unit In P1, the pager unit P1 becomes the CFRR of the new station (for example, station S2). Recognizing that it has entered, in step 510, the central control station (for example, station S2) CELL a request to communicate with<sub>2</sub>Against frequency C<sub>4</sub>Start with. Regarding the above, the pager unit P1 is still CELL<sub>2</sub>Time slot specified for Frequency C because it is not<sub>4</sub>Requests are made randomly. But, Pager unit P1 makes a request to a new central control station (eg station S2). Keep recording the time slot to do. After that, the pager unit P1 has a frequency C from station S2.<sub>2</sub>Communication packet by Continue to tap (step 512), station S2, pager unit P1 request in step 510 Wait for a message to refer to the time slot that went on strike. in particular, The pager unit P1 has a frequency C from station S2.<sub>2</sub>Message by SLOT R ECOGNITION COMMAND CODE and information randomly generated by the pager unit P1 Wait for a message that contains both the information stored in the same time slot. Messages containing SLOT RECOGNITION COMMAND CODE include station S2 as the sender And reflects the slots randomly generated by the pager unit P1 To do. Therefore, the pager unit P1 directs the message to the pager unit P1. Issuing such a message by station S2, recognizing that it was done (step in Figure 11) (See 612), but allows the pager unit P1 to make further communications with station S2. I think that. In this regard, in step 514, the pager unit P One microprocessor 80 is the time slot and step of the received message Whether or not it matches the time slot for which a random request was made in P510 judge. If it is finally determined in step 514, in step 516, -Jar unit P1 sends communication packets to frequency C<sub>3</sub>To send to station S2. The above communication The ket contains the identifier or ID of the pager unit P1. Station S2 is paged Using the installation file 55, the ID of the pager unit P1 is a valid ID. After confirming that, the message with the command code LOCAL FREQUENCY DOWNLOAD Sage to pager unit P1 (Frequency C<sub>2</sub>By) to send. Above message Is on the pager unit P1 the local frequency handled by station S2 (eg frequency). Number f<sub>5</sub>~ f<sub>8</sub>) Is given. Then also shown in step 518 As you can see, station S2 has the command code SLOT ASSIGNMENT COMMAND CODE. Message to pager unit P1 (Frequency C<sub>2</sub>By) to send. Above Messe The pager unit P1 has a frequency f.<sub>8</sub>Notify the slot designation for. So After microprocessor 80, the above mentioned about the time slot change routine Slot by steps similar to Tep (see steps 350, 352, and 354 in Figure 5) Change the allocation of data. Step 518 of FIG. 10 is the reception of the local frequency value. Indicates reception with a slot designation. After the acquisition of all local frequencies and slot designation are completed (step 520), The icroprocessor 80 has a new local frequency (eg frequency f).<sub>5</sub>~ f<sub>8</sub>) Perform the replacement (step 522). In this regard, the microprocessor 80 Transmitter 72, frequency f<sub>3</sub>And f<sub>4</sub>From frequency f<sub>7</sub>And f<sub>8</sub>I / O to change to Instruct the interface 86 and set the receiver 62 to frequency f<sub>1</sub>And f<sub>2</sub>From frequency f<sub>5</sub>And And f<sub>6</sub>Instruct I / O interface 86 to change to. I / O interface 86 Frequency control to connect the I / O interface to the transmitter 72 and receiver 62 respectively A frequency change is achieved by giving the line an appropriate value. After switching to the new local frequency in step 522, MicroPro Sessa 80 returns to step 506 and finally whether further switching is needed To judge. To the switching enable routine performed by the central control station (eg station S2) The steps involved are shown in Figure 11. After startup (step 600), CPU50 , CPU50 cleans up pager directory file 56 and one of the new Check if the pager unit is in a cell within the jurisdiction of CPU50 Execute loop 602 which allows you to do and do. In particular, in step 604, the CPU will eventually be the central control station (eg, S2). By any other central control station (eg S3) so far that central control station (eg S3) The pager unit under the control of S2) is controlled by another central control station (for example, S3). Determine if you have been notified that you have entered below. Such notifications are centralized Your station 420<sub>x</sub>Occurs on serial links that connect to, especially on the input serial link 486B. like this When notified, the ID of the pager that came under the control of another central control station will be the station. Removed from pager directory 56 on S2 (shown in steps 606 and 608). In step 610, CPU50 has a message with SYSTEM COMMAND CODE. Frequency C<sub>2</sub>To be sent by. As mentioned above, frequency C<sub>2</sub>Sent by The message is a packet (single or singular) with the format shown in Figure 12. Includes multiple). Messages with SYSTEM COMMAND CODE are especially alphanumeric data Include the central station ID number in the field. In step 612, the central control station 420 is assigned to one of the pager units 422. More frequency C<sub>4</sub>Request was sent by (eg, Figure 10, especially step 510). (As explained with reference to) Checks to determine whether or not. like this Request signal is controlled by CFRR controlled by the central control station (for example, station S2). CFRR to be controlled<sub>2</sub>) Tendency to be issued by the pager unit 422 that has just entered There is. If no such request signal is detected, loop 602 repeats again. returned. The central control station 420 specifically if a request signal is detected in step 612. , Frequency C<sub>4</sub>Note the time slot in which the request occurred. (Step 61 Four). At this time, the central control station 420 is turned on only by such a time slot. The embedded pager unit 422 can be identified. Central control station 420 enters The crowded pager unit 422 wants to send its identifier (ID), but it is detected Of the pager unit that entered only by referring to the time slot The destination cannot be specified. In step 616, central control station 420 SLOT Create a message with RECOGNITION COMMAND CODE and frequency C<sub>2</sub>Sent by Believe. Messages with SLOT RECOGNITION COMMAND CODE as sender Slots randomly generated by the pager unit P1 that include the station S2 For example, the time slot where the intruding pager unit 422 issued the request. G) is reflected. Frequency C<sub>2</sub>This transmission by pager unit P1 has its identifier Is to allow the transmission of. Step 618 is the central control station for the identifier (ID) of the intruded pager unit 422. Shows the acquisition by 420. In step 620, the central control station 420 has a pager ID. Pager registration file 5 to determine if it is a valid ID Check 5. If not a valid ID, an error message will be generated and sent (Step 622), followed by a command to shut down the pager unit P1. Will occur (see step 624). In step 620, the identifier of pager unit 422 is determined to be valid. If CPU50 checks pager directory file 56 (step 630) By doing so, the time slot that can be used for the intruded pager unit 422 The pager unit 42 that explored and then entered the available time slots Associate with the ID of 2. Then, in step 632, the central control station 420 is LOCAL. FREQUENCY DOWNLOAD COMMAND Frequency C with CODE<sub>2</sub>With the message by , Its local frequency value (eg f<sub>5</sub>, F<sub>6</sub>, F<sub>7</sub>, And f<sub>8</sub>) Send to Jaunit 422. The central control station then SLOT ASSIGNMENT COMMAND C Frequency C with ODE<sub>2</sub>New in its local frequency using the message by Specify the time slot for the intruded pager unit 422 (step 634) .. The processing of the time slot change command by the intruded pager unit 422 is , By referring to similar examples shown in FIG. 5, in particular steps 350, 352 and 354. To be understood. At the end of step 634, the entered pager unit 422 will have a new cell. (For example, CELL<sub>2</sub>Under full control of the previous control station (eg CELL)<sub>1</sub>and It is out of the jurisdiction of Bureau S1). Therefore, in step 636, the CPU 50 gets in. Notify (using the pager ID) that the pager 422 is under the jurisdiction of the new cell I / O interface so that the command to be issued is issued via the serial connection line 486A. Request to. This causes the previous competent authority (eg S1) to change its page. You can remove this pager unit from directory file 56. Such deletion Is understood by referring to steps 604 to 608 as described above. Figure 9 shows the pager unit P1, stations S1 and S2, and CELL.<sub>1</sub>And CELL<sub>2</sub>Geography with In addition to explaining the target position, the common frequency C<sub>1</sub>~ C<sub>4</sub>Relative tie of communication occurring on Indicates mining. Figure 9 in particular shows the central control station 420 (switchable enable routine in Figure 11). ) And pager unit 422 (channel switching routine in Figure 10) Regarding the timing of a plurality of specific steps among the above steps performed. Central control station 420<sub>x</sub>Is the same common frequency C<sub>1</sub>~ C<sub>4</sub>Is used, but the central control station 420<sub>x</sub><sub></sub>There is no interference or confusion between these signals transmitted from. Common frequency C<sub>1</sub>~ C<sub>4</sub><sub></sub>Is the common frequency C<sub>1</sub>~ C<sub>4</sub>Reception is central control station 420<sub>x</sub>Only in the limited area around (CFRR) Local frequency f to happen<sub>1</sub>~ f<sub>4</sub>Broadcast with less power than Is done. Therefore, the pager unit 422 moving in the system is limited and heavy. Common frequency C only within CFRR that does not overlap<sub>1</sub>~ C<sub>4</sub>To receive. Cell diameter, CFRR diameter, local frequency (eg f<sub>1</sub>~ f<sub>4</sub>) Power level, and And common frequency C<sub>1</sub>~ C<sub>4</sub>The system operating characteristics such as the power level of the system are particularly affected by the system. Per field to suit many factors, including the terrain and terrain of the area to bar It is adjustable to. In one embodiment that does not limit the invention, the radius of each cell is It is about 20 miles and each CFRR has a radius of about 10 miles or less. Smell in the same example And the power for transmission at local frequencies can be in the range of about 3 watts to 1000 watts, Common frequency C<sub>1</sub>~ C<sub>4</sub>The transmission power of is preferably 2 watts or less. Thus, is the present invention a telephone system for wireless data communication between users? Provides a two-way paging system that operates independently. The present invention is any Only 4 local frequencies f for a given cell<sub>1</sub>~ f<sub>4</sub>And (by multiple cells To cover a wider area) Only 4 common or switching frequencies C<sub>1</sub>~ C<sub>4</sub>Allowed by the Federal Communications Commission (FCC) by using Minimize wavenumber usage. Maximum number of frequencies (eg channels) used By limiting to a small limit, time division sharing technology and synchronization technology are used. Low The transmission power difference between the cal frequency and the common frequency is also used. These technologies Separates data transmissions between different pagers, thus eliminating data merging Be excluded. The switching technique of the present invention increases the number of frequencies used in the cell to 4 (for example, 4). From (local frequency) to 8 (4 local frequencies and 4 common frequencies) Increase to increase operational geographic range and minimize paging time Limit to the limit. A single pager registration file is associated with verifying the pager ID , Stored in only one memory file of multiple central control stations, and In that case, checking is the pager in one (remote) memory file above. Issuing a search command (via serial link 486) to search for an ID Understand that the search results will be reported to the inquiring central control station. I want to be. The keyboard herein is, in some embodiments, eg English, medium. Multilingual keyboard or lightin that allows typing in national or Japanese It can be a gupad. The writing pad uses an alphabet like English It is especially useful in Japan, Thailand, Middle Eastern countries, or China. La Iting pads can also be used to sketch and send shapes .. In addition, data compression / decompression techniques can be used in connection with data transmission. Although the present invention has been described and described with reference to specific preferred embodiments, the art Various forms and details without departing from the ideas and scope of the present invention. Understand that various modifications are possible. For example, is the pager unit the central control station? Used by repeaters in cells to facilitate transmission when far away Can be Embodiments of the present invention for which exclusive ownership is claimed are defined as follows.
80 members in 15 offices
Priority claims9
| Document | Office | Kind | Date |
|---|---|---|---|
| 264973 | United States of America | – | |
| 26497394 | United States of America | A | |
| 26497394 | United States of America | A | |
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| 9507627 | United States of America | W | |
| 1994264973 | – | – | – |
| 199507627 | – | – | – |
| US19940264973 | – | – | – |
| WO1995US07627 | – | – | – |
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| EP0776549A1 | European Patent Office (EPO) | A1 | |
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| EP0776549A4 | European Patent Office (EPO) | A4 | |
| US6108520A | United States of America | A | |
| CN1064493C | China | C | |
| JP2001506430AThis record | Japan | A | |
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| EP0776549B1 | European Patent Office (EPO) | B1 | |
| AT274767T | Austria | T | |
| ATE274767T1 | Austria | T1 | |
| DE69533424D1 | Germany | D1 | |
| EP1471662A2 | European Patent Office (EPO) | A2 | |
| EP1471662A3 | European Patent Office (EPO) | A3 | |
| EP0776549B8 | European Patent Office (EPO) | B8 | |
| PT776549E | Portugal | E | |
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Numbers
- Publication
- 2001-506430
- Publication, DOCDB
- 2001506430
- Publication, EPODOC
- JP2001506430
- Application
- 50323896
- Application, DOCDB
- 50323896
- Application, EPODOC
- JP19960503238
Titles2
- Japanese
- 【発明の名称】ページング方法および装置
- English
- [Title of Invention] Paging method and apparatus
Classification
- CPC, 22
- H04W12/06
- H04B7/00
- H04W28/26
- H04W36/08
- H04W48/08
- H04W56/00
- H04W68/00
- H04W68/02
- H04W72/04
- H04W74/002
- H04W74/04
- H04W74/06
- H04W84/02
- H04W84/022
- H04W84/025
- H04W88/022
- H04W88/185
- H04W76/10
- H04W12/08
- Y02D30/70
- H04W72/23
- H04W72/0446
- IPC, 18
- H04J3 00
- H04B7 00
- H04L7 00
- H04L12 56
- H04W12 06
- H04W28 26
- H04W36 08
- H04W48 08
- H04W56 00
- H04W68 00
- H04W68 02
- H04W72 04
- H04W74 04
- H04W74 06
- H04W74 08
- H04W76 02
- H04W84 02
- H04W88 18