JPH10508449A - Method and apparatus for identifying a transmitter in a simulcast wireless communication system - Google Patents

Abstract

(57) Abstract (810) An apparatus for identifying (810) a communication cell (500) in a simulcast wireless communication system (100) comprising a communication cell (500) and a portable communication unit (PCU) (108). The identification bit patterns (602, 604, 606) are assigned (802) to the cells (500) such that transmissions of the identification bit patterns are received simultaneously from cells (500) adjacent to each other, whereby the reception interference bit patterns (708), the identity of the received cell (500) can be reduced to a subset of the cell (500) by analysis of the received disturb bit pattern (708), said subset being the received cell (500). )including.

Description

DETAILED DESCRIPTION OF THE INVENTION         Simulcast wireless communication system         Method and apparatus for identifying a transmitter Field of the invention   The present invention relates generally to wireless communication systems and more particularly to Simulka. Method and apparatus for identifying a transmitter in a strike wireless communication system . Background of the Invention   Communication systems that use simulcast transmission are well known. Typical example Is a wireless paging system. A single information signal can be geographically dispersed simultaneously From a remote transmitter to provide wireless coverage over a large geographic area , Simulcast transmission is used in most wide-area wireless paging systems. Have been.   The geographic coverage area and thus the simulcast wireless communication system If the number of users grows, Communication traffic reaches system capacity May be And before additional areas and users can be accommodated Steps must be taken to increase system traffic capacity . One step often taken is to add another radio channel to the system. And in is there. This step is relatively expensive at best, And all available It may not be possible in some locations where available channels are occupied.   Therefore, Simulcast radio in a way that does not require an additional radio channel There is a need for a method and apparatus for increasing the capacity limit of a communication system. Summary of the Invention   In one aspect of the invention, A cover in a simulcast wireless communication system. Geographically to provide substantially continuous wireless coverage over the storage area To identify a communication cell among a plurality of communication cells located in distributed locations Device is provided. The apparatus comprises a plurality of communication cells, And coupled to the plurality of communication cells And a central controller for controlling the plurality of communication cells. The device Further, the plurality of communication cells are identified to identify at least one of the plurality of communication cells. A portable communication unit for wirelessly communicating with at least one of the communication cells I do. further, The device comprises an identification bit pattern. A central controller coupled to the plurality of communication cells for assigning a service to the plurality of communication cells. Include an assignment element in the Troller . The identification bit pattern is a duplicate of the transmission of the identification bit pattern adjacent to each other. Simultaneous reception from one of several communication cells And The received interference bit pattern (interference)   bit pattern), The received plurality of communication cells Are identified by the portable communication unit By analyzing the received jamming bit pattern, a subset of the plurality of message cells is obtained. Or a subset. The subset is It includes the one of the plurality of communication cells received.   In another aspect of the invention, Simulcast wireless communication system with multiple communication cells System to provide substantially continuous wireless coverage over a coverage area. Service in multiple communication cells located in geographically dispersed locations to provide A portable communication unit for identifying a communication cell is provided. The portable communication unit Receives simulcast transmissions from more than one of the communication cells A receiver element that demodulates the interfering bit pattern by And said receiver Analysis of the received disturbing bit pattern coupled to the An identification element is provided for identifying a subset of the communication cells. The subset is Includes more than the one of the plurality of received communication cells. Said portable A communication unit is further coupled to the receiver element and a portable unit is assigned A plurality of said plurality of reception interference bit patterns expected in the service area. Received from at least one of the communication cells Storage element for storing the processor information. The service area Consists of selected portions of the coverage area. further, The portable communication The unit is The service area from the program information coupled to the memory element; Received a disturbing bit pattern specified as expected in the region It is determined that the portable communication unit is in the service area according to, And furthermore, interference bits not specified as expected in the service area. The portable communication unit responds to the reception of the (A) It contains a program to determine that it is not inside. BRIEF DESCRIPTION OF THE FIGURES   FIG. Simulcast wireless communication system according to a preferred embodiment of the present invention FIG. 3 is an electrical block diagram of FIG.   FIG. An electric block of a portable communication unit according to a preferred embodiment of the present invention. FIG.   FIG. Receiver in fixed communication unit according to preferred embodiment of the present invention FIG. 3 is an electrical block diagram of FIG.   FIG. The central controller electrical block according to the preferred embodiment of the present invention FIG.   FIG. Simulcast wireless communication system according to a preferred embodiment of the present invention 3 is a map diagram showing a communication cell of FIG.   FIG. In a communication cell according to a preferred embodiment of the present invention, FIG. 4 is a map diagram showing assigned identification bit patterns.   FIG. FIG. 4 is a diagram illustrating a reception disturbing bit pattern according to a preferred embodiment of the present invention. It is a clear chart.   FIG. Cyfulcast wireless communication system according to a preferred embodiment of the present invention 6 is a flowchart showing the operation of the first embodiment.   FIG. Simulcast wireless communication system according to a preferred embodiment of the present invention FIG. 5 is a signaling ring diagram showing data transmitted to the portable communication unit of FIG.   FIG. Simulcast wireless communication system according to a preferred embodiment of the present invention Signal indicating the data transmitted from the portable communication unit to the receiver in the communication cell of the FIG. Description of the preferred embodiment   Acknowledge-back communication systems are Acknowledgment response to the communication system after receiving the poll Low power, to Has a portable selective call receiver that uses a narrowband transmitter You. Such systems are known as "acknowledge back pagers (Acknowledd). ge Back Page) " United States against Moore Patent No. 5, 124, No. 697, "Acknowledge and respond to paging signals Method and Apparatus (Method and Apparatus for) Acknowle dging and Answering a Paging Signal) U.S. Patent No. 5 to Davis, entitled " 153, No. 582, Soshi "Frequency Division Multiplex Acknowledgment Back Paging System (Frequenc y Division Multiplexed Acknowledge B ack Paging System "by Siwiak U.S. Pat. 875 No. 038. US Patents shown above Is incorporated herein by reference.   Including an acknowledgment back communication system, Traditional wireless paging systems Works ubiquitously, That is, the system Simultaneous transmission of each fixed-mobile communication from each fixed transmitter Simulcast fixed-portable radio transmission is used. However, If you Locating the band communication units as they move through the system If you can find a way to stop it, Communicate with any one individual portable communication unit The number of base transmitters and receivers used for each portable communication unit To a fixed transmitter and receiver near the This isolation Is the base transmitter, Geographic coverage of receiver and communication spectrum system In other parts of the communication area for additional communication with other portable communication units. Make it available.   According to a preferred embodiment of the present invention, Communication within the Simulcast wireless communication system A method and apparatus for identifying a source cell is described below. The method and apparatus , As mentioned above, Transmitter, Achieve the benefits of receiver and spectrum reuse Can be used to locate the portable communication unit. The method and And the device also covers the area of the wireless coverage area to which a portable communication unit is assigned. Can be used to detect movement outside the enclosure.   Referring to FIG. Simulcast radio communication according to a preferred embodiment of the present invention The electrical block diagram of the communication system 100 is shown in a public switched Central control having a telephone input 110 for interfacing with a talk network The roller 102 is included. Preferably, The central controller 102 Ameri United States, By Motorola, Inc. of Schaumburg, Illinois Manufactured E09PED0552 type “Page Bridge” (PageBridge ) (Registered trademark) Preferred implementation of the present invention as described below Modified by a special firmware element according to the form. other It is understood that similar equipment can be used as the central controller 102 as well. Will.   The central controller 102 controls the plurality of communication units 101 Preferably multiple By telephone line 106 of Are combined. Fixed communication with central controller 102 Unit 10 It will be appreciated that a wireless link can be used as well to couple with the one. Each of the fixed communication units 101 As explained further below, Simulcast In one of the plurality of communication cells 500 of the wireless communication system 100 (FIG. 5), Provide storage.   The fixed communication units 101 are preferably each in a geographically dispersed location A plurality of receivers 103 arranged, And a cell transmitter 104. Cell transmission Device 104 and the plurality of receivers are connected by a wireless link to a plurality of portable communication units 1. 08, A wireless pager preferably having acknowledgment back capability, Combined with Transmitting and receiving information to and from the band communication unit 108; Receive. Preferably, The cell transmitter 104 is located in the United States, Illinois, Sha C73 PU manufactured by Motorola, Inc. of Hamburg It is similar to the RC 5000 type (registered trademark) transmitter. Other similar transmitters The same can be used as the cell transmitter 104. The plurality of transmitters 103 and a mobile phone The communication unit 108 will be described later in more detail.   During the initial setup of the Simulcast wireless communication system 100, Central Con The controller 102 preferably has an identification beam for each of the communication cells 500 in accordance with the present invention. Define and assign cut patterns. Simulcast wireless communication system 100 During subsequent operations of The caller is the mobile communication unit A particular one of the units 108 receives or is signaled (signal) d) entering a telephone call into telephone input 110 to request that Notify thereby Any group of portable communication units 108 to be created (random gro up). Preferably, The caller has a suitable input device, for example, Tonda Using an earphone or alphanumeric page input device, Thereby the message, An example For example, Callback number, To be input as well. Central controller 1 02 preferably includes a plurality of selections corresponding to said arbitrary group for subsequent transmission. Form and queue alternative call addresses.   next, The central controller 102 communicates with the queued selective call address. Form or format information with The information is preferably in the optional group. With orders for each member of the group, Time to be used for the response and And channel. Central controller 102 then selects the selective call address and And the associated information in a manner well known in the art. Send to 104. The transmitter 104 Depending on the paging channel, Golay Sea Like Goalial Sequential Code , Using a well-known paging protocol, said selective call address and The related information is simulcast to the portable communication unit 108. further, The central controller 102 sends a cell Assigned during initial setup to the communication cell 500 where the transceiver 104 is located Each transmitter 104 is controlled to periodically transmit the identification bit pattern.   The portable transmitting unit 108 receives the page and the selective calling address is therein In response to detecting a match with the selective call address programmed in , The portable communication unit 108 is connected to the specified channel by the specified channel. Send response on time. The response is As explained further below, Preferred of the present invention At the end of the identification bit pattern for the communication cell 500 according to the present embodiment. Subset or subset of the plurality of communication cells 500 identified from the identified transmission (Subset).   Identified by the reporting portable communication unit 108 After determining a subset of the plurality of communication cells 500, Central controller 102 Is preferably According to a preferred embodiment of the present invention, Reporting portable communication unit Selecting the identified subset for further communication with Meanwhile reported Terminate further communications from cells 500 not in the subset.   Alternatively, The portable communication unit 108 has a program inside the portable communication unit. If there is no reception of the selective call address that matches the selected selective call address However, the transmission of the identification bit pattern to the communication cell 500 is periodically monitored. It will be appreciated that it is possible to do so. The portable communication unit 108 is next The portable communication unit 108 uses the monitored identification bit pattern to Judge whether it is within the assigned service area, And according to the user Notifications can be made.   Referring to FIG. Portable communication unit 1 according to a preferred embodiment of the present invention 08 is an electrical block diagram containing addresses and information from the cell transmitter 104. Includes antenna 202 for capturing line signals and returning responses to multiple receivers 103 It is. The antenna 202 is coupled to a transceiver 204, The transceiver 204 A receiver 208 for demodulating the captured wireless signal; And send response For transmitting a response. Preferably, Response transmitter 206 is a traditional A low power narrow band binary FSK transmitter, And the receiver 208 is the United States, I Linnoy, Manufactured by Motorola, Inc. of Schaumburg A03KLB5962CA Used in ADVISOR type (registered trademark) pager. It is the same as the receiver used. Other similar receivers also It will be understood that they can be used as well.   For the encoder / decoder 210 to decode the received address and It is coupled to the transceiver 204 for encoding the response thereto. D The encoder / decoder 210 controls the encoder / decoder 210 only. Coupled to the processor 212 for responding to the address decoded therein. ing. Processor 212 is preferably the United States, Illinois, Shamba MC68HC05C manufactured by Motorola, Inc. It is one of the microcomputers of the type 8 or C11 series. Other kind It is understood that similar processors can be used as processor 212 as well. There will be. Processor 212 further performs the control and processes the received information. It is coupled to a transceiver 204 for processing.   A real time clock 226 is also coupled to the processor 212 to provide a real time Provides control. further, Various received in information from the cell transmitter 104 Processor 212 to temporarily store the operating parameters of the Access memory (RAM) 214, The operating parameters are in accordance with the present invention. Therefore, the received bit pattern 220 is used to identify a subset of the communication cells 500. Have. in addition, The operating parameters are preferably further for the response A response channel section 224 defining the channel to be used; And opening the response A response time section 222 for controlling the start time is provided. The response channel unit 2 The designation of 24 can be omitted in systems using a single response channel. It will be appreciated. further, The response time section 222 is specified by a cell transmitter. 104 or Start responding at a fixed time interval after the marker transmitted in their information It will be appreciated that this can be omitted in systems that require   Also, The processor 212 has at least one response to which the portable communication unit 108 responds. An address location 236 for storing two selective call addresses, and The services assigned to the portable communication unit 108 by the central controller 102 Expected received bit pattern for service area and corresponding significant mask (Service area) for storing (significance masks) Electrically erasable programmable read only memory with application 218 EEPROM 232 is connected. The significant mask is sent to processor 212 Thus, the corresponding expected received bit pattern and said received bit pattern 2 20 to determine the received subset or subset of the communication cell 500.   The EEPROM 232 further comprises: By analyzing the received bit pattern 220 Comprising an identification element 234 for identifying a subset of the communication cell 500; Portable communication A firmware element for controlling the communication unit 108. The fur The firmware element further associates the identified subset with at least the communication cell 500. Reporter element 2 to also report to one 35 is provided. An output element 228 with a display device It is coupled to the processor 212 for displaying the message. Well-known bo Like tongue and knob, User control 230 is also coupled to processor 212. To provide control of the portable communication unit 108 by the user. Alarm device 229 Is coupled to the processor 212 to generate an alarm under the control of the processor 212 .   Electrically rewritable read only memory (EAROM), Battery backup RAM type, And similar forms of electrically reprogrammable non-volatile memory Can also be used in place of the EEPROM 232. further, RAM 214, EEPROM 232, Part of the real-time clock 226, Encoder / Deco 210, And processor 212 may include one or more contiguous (con) (Tiguous) integrated circuit.   Referring to FIG. Fixed communication unit 10 according to a preferred embodiment of the present invention One electrical block diagram of the receiver 103 in FIG. Antenna 302 for capturing the response from Receiver element 304 Are coupled to antenna 302 to demodulate the captured response. Receiver element 304 Preferably, it has a pass band compatible with the narrow band response from the portable communication unit 108. Is a traditional double-conversion RF receiver. Receiver element 304 receives Coupled to the processor 306 for processing the demodulated response. Process 306 is preferred The United States, Illinois, Motorola Incorporated in Schaumburg My MC68HC05C8 or C11 series manufactured by Ted One of the computers. Other similar processors may also include processor 30. It will be understood that 6 can be used as well.   Processor 306 has a mechanism for storing the response received by receiver 103. It is coupled to a RAM 310 with memory locations 312. Processor 3 06 is also used when the receiver 103 communicates with the central controller 102. A pre-programmed receiver for identifying the receiver 103 to the controller 102 ROM equipped with a receiver identifier 309 308. Processor 306 is also a traditional communication interface 314, For example, RS-232 interface and modem, Joined to phone Communicating with the central controller 102 via one of the lines 106 9 together with the received response stored in said memory location 312 . Programmable read only memory (PROM), EEPROM, EARO M, And other similar types of non-volatile memory also replace ROM 308 It will be appreciated that it is possible. further, RAM 310, ROM 308 , And the processor 306 are integrated as one or more continuous integrated circuits It will also be understood that it is possible.   Referring to FIG. Central controller 10 according to a preferred embodiment of the present invention The electrical block diagram of FIG. 2 illustrates one of the receivers 103 via one of the telephone lines 106. A communication interface 402 for performing communication is provided. Communication interface 4 02 is coupled to the processor 404 and communicates with the communication interface 402. Process the answer. Processor 404 couples to RAM 408 to store the response Have been. RAM 408 is a portable communication unit 10 that sends each reported response. 8 together with an identifier location 412 of the portable communication unit for identifying A response location 410 for storing the generated response. Said reported The response received, as explained further below, A subset report (subset re ports) and out-of-service-area (out-of-service-area) : OOSA) message.   RAM 408 further stores a plurality of selective call addresses in accordance with a preferred embodiment of the present invention. A queue for queuing the dress and related information for subsequent transmission. Queue queue 413 is provided. Processor 404 is also a subscriber ROM 416 for nonvolatile storage of database 418 and central control Coupled to a firmware element for controlling the PROM, E EPROM, EAROM, And like magnetic disk memory, It is understood that other types of non-volatile memory can be used as ROM 416. There will be.   The firmware element assigns an identification bit pattern to the communication cell 500 And an assignment element 420 for The identification bit pattern is The identification bit The transmission of the turn is performed by the portable communication unit 108 from the communication cell 500 adjacent to each other. Received simultaneously by When it generates a reception interference bit pattern To The identity or identity of the received communication cell 500 is Assigned so that they can be resolved or determined by the Said Aiden Titi analyzes the received jamming bit pattern to obtain a subset of the cell 500. Can be clarified In this case, the subset contains the received communication cells. The assignment factor is Preferably, as described below with reference to FIG. Communication cell 5 A defining element (definiti) for defining an identification bit pattern for 00 on element 426.   The firmware element also includes After receiving the subset report, The subset The identity of the portable communication unit 108 transmitting the report and the reported communication cell 500 Terminate the transmission of communication with the communication cell 500 that does not belong to the separated subset. A terminator element 428 is provided for this purpose. The firmware element further includes a service to which the portable communication unit 108 is assigned. Obi Information that defines the expected jamming bit pattern in the A programmer element 430 for programming the band communication unit 108; I mean, In this case, the service area includes a selected part of the coverage area. It is.   The firmware element may also be a service to which the portable communication unit 108 is assigned. Re-define the expected jamming bit pattern in the service area (red efines) Reprogram portable communication unit 108 with new information Reprogrammer 432 for In this case the reprogramming Is a wireless transmission between at least one communication cell 500 and the portable communication unit 108 Done by   Processor 404 also provides an input for receiving a page request by telephone input 110. Coupled to the force interface 406, In addition, the portable communication unit 108 Cell communicator via one of the telephone lines 106 for transmitting messages and messages. To the encoder / transmitter controller 414 for interfacing with Have been combined. The hardware components of the central controller 102 are traditional. United States, Illinois, Motorola Incorporated in Schaumburg E09PED0552 "Page Bridge" manufactured by Ited (Page Bridge) (R) Same as hardware elements of paging terminal belongs to. Firmware element 420, 426, 428, 430, 432, And the organization and use of RAM 408 in central controller 102 is an advantage of the present invention. A new element according to the preferred embodiment is configured.   Referring to FIG. The map diagram is For an example of 25 cells, Preferred of the present invention 1 shows a communication cell 500 of a simulcast wireless communication system 100 according to an embodiment. doing. Communication cell 500 is shown as hexagonal in shape and has horizontal rows 502 and, Here, it is defined as being substantially orthogonal to the horizontal row 502, Almost vertical Left and right diagonal lines 504 506. Cell 500 is the outermost Substantially continuous over the coverage area defined by the boundaries of cell 500 The cell 500 is arranged to provide coverage.   Referring to FIG. The map diagram of the communication cell 500 is: For the 25 cell example, The identification bit pattern assigned to the communication cell 500 according to the preferred embodiment of the present invention. Turn 602 (2 bits), 604 (2 bits), 606 (12 bits) ing. Bit 602 is preferably the left diagonal line 504 over communication cell 500. Any communication cell in a first direction along any one from any adjacent communication cell Has become constant, And any in the second direction along any one of the rows 502 Assigned in a pattern that changes from a message cell to any adjacent message cell. Bi 604 is preferred Or any neighbor from any message cell in a second direction along any one of the rows 502 It stays constant at the communication cell, And along any one of the left diagonal lines 504 Changed from any communication cell to any adjacent communication cell in the first direction Assigned over the communication cell 500. Bit 606 is preferably the bit Uniquely identify each one of the communication cells 500 over the coverage area. Assigned to   Preferably, The unique bit 606 is 0000 in the top left cell 500   Start with 0000 0011, Move right along the first horizontal row 502 While shifting the pattern by one place to the left. Preferably , As one moves down along one of the right diagonal lines 506, In the previous line Immediately to the left of the most significant bit, an additional two bits 11 are set. For example, Top left When moving down the right diagonal line 506 from the cell to the second horizontal row 502, Original Bits 606 are from 0000 0000 0011 to 0000 0000 11 It changes to 11.   FIG. 6 also illustrates an identification bit pattern 602 according to a preferred embodiment of the present invention. , 604, The four features used in further discussion below with respect to the application of 606 Fixed cell 608, 610, 612 614 is shown.   A preferred bit allocation scheme is any size cell with any number of cells 500. Applies to the coverage area. general In order to correspond to the preferred pattern for Substantially square cell array The number of unique bits 606 required for each cell in A is 2 × MAX (R , C) +6, In this case, MAX (R, C) is the number of rows or rows Means the greater of the number of cells to be placed. In the general case, Unique bit 6 06 is preferably assigned according to the following scheme.   1. Starting at the top left cell 500, the two least significant bits are equal to "1" and And all other unique bits 606 are zeroed.   2. Each succeeding cell 5 of the right sloping line 506 from the top left cell 500 00 is the two additional bits set to "1" at the next available least significant bit position. Have a set.   3. When all the initial oblique line cells 500 are completed through the above step 2, the next The least significant two bit positions obtained are set equal to "0".   Note) If N rows are involved in the above operation, 2 × N + 2 bits are required Which means that the preferred bit allocation scheme is that at least two of the unique bits Is required to be zeroed.   4. A unique bit 606 in each row to the right of the initial diagonal cell 500 Formed by rotating the bit from the left hand neighborhood one position to the left You.   5. Unique in each row to the left of the initial diagonal cell 500 Bit 606 rotates the bit from the right hand neighbor of the cell one position to the right It is formed by doing.   Other similar bit allocation schemes also include the identification bit patterns 602, 604, 606 The essential requirement is that the allocation plan was received as a result For a subset of cells 500, including cells 500 in which the disturbing bit pattern is being received, To be able to come back.   Referring to FIG. 7, a chart 700 shows a reception according to a preferred embodiment of the present invention. Some examples of disturbing bit patterns are shown. First column or column of chart 700 702 is a reference numeral corresponding to a particular cell 608, 610, 612, 614 of FIG. While the corresponding row in the second column 704 is assigned to the cell shown in FIG. FIG. For example, the average between certain cells 608 and 610 Etc., the portable communication unit 108 has a pair of two bit patterns 706. Receive simulcast transmission. At the vertex where three cells match, three simulkas It is possible to receive a strike transmission. For example, specific cells 608, 612, 6 Where 14 matches, the portable communication unit 108 has three bit patterns. 710 will receive a triplet of simulcast transmission .   Receive jamming bits for simulcast combinations of the bit patterns of the above example Pattern 708 is the “RESU (RESU)” immediately below the combined bit pattern. LT) ”line It is shown. Receiving simulcast transmissions from two or more sources The transceiver correctly detects the bits transmitted by each source with the same value, It complements each other if bits of the same value are received as simulcast transmissions. Because it strengthens. Indeterminate bits that differ from one source to the next But one bit value or the other can capture the receiver To generate a bit value of 1 or 0. Such indeterminate bits are This is indicated by “x” in the port 700.   An important aspect of the received jammer bit pattern 708 is that Communication set received as one of a pair or triad of signals that produces a Is that any of the files 500 can be reduced to a subset of the cells 500. The part The aggregate is the cell 500 itself and any received in the jammed transmission. Or another cell 500. That is, the jamming pair results in two of the cells 500 And the jamming triad could be reduced to three of the cells 500. This specification Program according to the preferred bit pattern allocation scheme described above in the textbook Computer simulation has theoretical 1024 cells 500 Performed on the system. The computer simulation is the preferred bit Resolution as described above for the pattern assignment plan capabilities) was confirmed.   The minimum number of cell transmitters 104 used for each of the communication cells 500 is one. It will be understood that In addition, the robustness of the system s) two or more cell transmitters for each communication cell 500 104 are preferably used, and additionally for each one of the communication cells 500 Over two or more cell transmitters 104 assign a single identification bit pattern. Preferably, it is applied. A single identification bit pattern in each cell 500 By using two or more transmitters 104 provided, the cell transmitter 1 04 loss is received by the portable communication unit 108 according to the present invention. Has little effect on the disturbing bit pattern.   Referring to FIG. 8, a simulcast radio communication according to a preferred embodiment of the present invention is illustrated. The flowchart 800 showing the operation of the communication system 100 includes the central controller 10. The second processor 404 assigns an element 420 to access the communication cell 500 for the identification bit patterns 602 and 604. , 606, beginning by defining and assigning.   The identification bit patterns 602, 604, and 606 of the communication cell 500 are the identification bit patterns. The first portion 602 of each of the turns 602, 604, 606 is optional in a first direction. Staying constant from the communication cell to any adjacent communication cell and in the second direction From any communication cell to any adjacent communication cell And the second direction is substantially the same as the second direction. It is orthogonal to the first direction. Identification bit patterns 602 and 60 of communication cell 500 4,606 further comprises a second one of each of the identification bit patterns 602,604,606. Portion 604 is from any message cell to any adjacent message cell in the second direction. Stays constant and any neighbors from any message cell in the first direction It is further defined to have a pattern that changes to a communication cell. Communication The identification bit patterns 602, 604, and 606 of the A third portion 606 of each of the patterns is associated with the plurality of communication cells in the coverage area. Is defined to have a pattern that uniquely identifies one of the files.   The specified identification bit patterns 602, 604, and 606 correspond to the identification bit patterns. The transmissions of the turns 602, 604, and 606 are simultaneously performed by a plurality of communication cells 00 to portable communication unit 108, thereby receiving When generating the jamming bit pattern 708, the plurality of communication cells 500 The identity of some of the The analysis of the packet pattern 708 results in a subset of the plurality of communication cells 500 or Can be resolved, in which case the subset is a subset of the plurality of received cells 500. Things. For example, specific cells 608, 612, 614 in FIG. The portable communication receiver 108 that receives the interference bit pattern from the Pattern can be reduced to specific cells 608, 612, 614.   Next, the processor 404 of the central controller 102 executes the programming (pro) access to the encoder / transmitter controller 414 Communication unit 1 assigned to Simulcast wireless communication system 100 08 to send a message to each of the portable communication units 108. The expected received bit pattern 708 corresponding to the designated service area. Programming 804 the band communication unit 108. Then the central control The processor 404 of the controller 102 controls the encoder / transmitter controller 414 The identification bit pattern assigned from each cell transmitter 104 to the cell transmitter 104 Turns 602, 604, and 606, for example, for each batch of pages, Periodically, simulcast transmission 806.   Next, one of the portable communication units 108 has at least one cell transmitter 1 04, a wireless page is received from the portable communication unit 808. Selective call address programmed to address location 236 of unit 108 Address from the single cell transmitter 104 (Intact) received identification bit patterns 602, 604, 606, Rui Is a disturbing bit pattern resulting from a plurality of received signals from a plurality of cell transmitters 104 708. In any case, the portable communication unit 108 Processor 212 stores the received bit pattern, 810, and identification element 2 34 and the service area location 218 to access the received bit pattern. To analyze the subset of communication cells 500 associated with the received bit pattern. Separate. Next, the processor 212 of the portable communication unit 108 executes the encoder / decoder. The coder 210 and the response transmitter 206 are controlled to reduce the identified subset. Report to at least one cell 500 and from there to central controller 102.   In response, processor 404 of central controller 102 terminates the terminator. Or access the terminator element 428 Cell transmitter 1 located in a cell 500 that does not belong to the reported subset 4. End subsequent transmissions from 04, 812, termination of the transmission is associated with the wireless page. Applies to further messages. This operation is preferably performed on the cell whose transmission has been completed. Release the transmitter 104 of the cell at 500 and thereby for other communication activities Make it available for use.   Alternatively, the portable communication unit 108 simply converts the received bit pattern into a central code. Controller 102, and then the central controller 1 02 reported The communication cell 50 relating to the received bit pattern by analyzing the received bit pattern A subset of zeros can be enforced. This alternative method of operation is a portable communication unit Reduce memory and processing requirements at 108 while allowing the central controller 102 Memory and processing requirements in   In any case, the processor 212 of the portable communication unit 108 By accessing the reallocation 218, the portable communication unit 108 To determine whether or not it is within the service area assigned to the communication unit 108, 8 14,816. If the portable communication unit 108 is within the service area, , Portable communication unit 108 waits to receive the next batch of pages, 818, Then, the process returns to step 806. If the portable communication unit 108 is If it is not in the rear, the processor 212 of the portable communication unit 108 alerter) 229 to control 820, a portable communication unit to the user. 108 is no longer within the service area assigned to the portable communication unit 108 An alert is generated 820 to notify the absence. Of the portable communication unit 108 Processor 212 further controls encoder / decoder 210 to control communication cell 50. 0 and sends a message to at least one of the 2 and assigned to the central controller 102 by the portable communication unit 108 Notify that the service area is not within the specified service area.   Accordingly, central controller 102 may be a reprogrammer or reprogrammer. Access the reprogrammer 432 to access the encoder / transmitter Troll 414 will relocate portable communication unit 108 to a new service area. 822, control according to the new expected received bit pattern And the new service area is the cell 50 reported in step 810. Contains the received bit pattern associated with the subset of zeros. Following step 822, The flow moves to step 818 to wait for reception of the next batch of pages.   Alternatively, the central controller 102 determines whether the reported received bit pattern is Or reporting directly from the identified subset of the reported cell 500. The service that the band communication unit 108 is assigned to the portable communication unit 108 It can be determined that it is not in the area. This alternative method of operation is Reduces memory and processing requirements in the knit 108 while the central controller 1 02 increases memory and processing requirements.   Referring to FIG. 9, a signaling diagram 900 relates to a preferred embodiment of the present invention. Transmitted to the portable communication unit 108 of the Simulcast wireless communication system 100. 2 shows data with a page batch to be performed. The data is a portable communication unit Beginning with a synchronization signal 902 for synchronizing 108 with the cell transmitter 104. Following this, each communication cell 500 is provided with an identification bit pattern 602, 604, 606 uniquely assigned to There is a cell identifier 904 obtained. Then many Pages 906, 908, and 910 follow. Each page 906, 908, 910 Is a selective call to select the portable communication unit 108 to which the page is directed Address 912. Each page is designated for further response Time 914, the designated channel 916 for a response, and the portable communication unit. Out-of-service message (out-of-service- allocated service area needed after the area message) With the expected received bit pattern 918 for   In another system, some parts of the data shown in the signaling diagram 900 It will be appreciated that the minutes can be omitted. For example, use a single response channel A first alternative system reserves a single response channel to the portable communication unit 108. Omit sending the specified channel 916 by programming Wear. A second alternative system is, for example, to move the portable communication unit 108 after the marker. At a fixed time interval, e.g., a specific reserved bit pattern Pre-program to respond 100 ms after receiving , The transmission of the time 914 specified can be omitted. Third alternative system The cell identifier 91 along with each page batch 4 is not transmitted, and instead the cell identifier 904 is transmitted periodically, for example, every 5 minutes. You can choose to trust.   Referring to FIG. 10, a signaling diagram 1000 illustrates a preferred embodiment of the present invention. Therefore, the portable communication unit 108 can send the simulcast wireless communication system 10 0 shows the data including the response transmitted to the receiver 103 in the communication cell 500. You. The external response is the transmission of the guard band and the portable communication unit 108 and the receiver 10 3 is provided with a synchronization signal 1002 for synchronizing them. The response is further received Subset for reporting a subset of cells 500 identified from the determined bit pattern A subreport 1004 is provided. The response is The portable communication unit is expected to have the received bit pattern programmed Transmitted in response to a determination that none of the received bit patterns match. Out of service area message 1006 to be provided.   Another system may omit certain parts of the data shown in signaling diagram 1000. It will be understood that For example, a first different system may respond Less required to do so, for example, by the central controller 102 Only when this is the case, transmission of the subset reporting unit 1004 can be selected. single A second alternative system that only uses the service area of course The message 1006 outside the rear can be omitted.   Further, for example, simulcast wireless communication without acknowledgment back capability It will be appreciated that the entire response can be omitted in the system. like that The system is of course according to the reported location of the portable communication unit Radio coverage cannot be adjusted, because there is no location reported It is. The portable communication unit is no longer within the service area to which it is assigned. Capability, however, is not supported by the portable communication unit Service area as an ability to alert the user that they have left the service area. Can be kept.   Accordingly, the present invention provides a method for simultaneous communication in a manner that does not require an additional radio channel. A method and apparatus are provided for increasing the capacity limit of a strike wireless transmission system. Traditional Different from the system, a preferred embodiment of the present invention is suitable for a portable communication unit. Identify a subset of the received simulcast message cells and perform system control. The identification may be one or more simultaneously received from the communication cell. It is performed from further simulcast transmission. The present invention is also free of simulcast. By enabling the reuse of radio channels in wireline communication systems Greater efficiency of wireless spectrum utilization can be provided. Further, the present invention Radio assigned to the user on the move according to the changing requirements of the user Automatic coverage redefinition Can be provided.

Claims (1)

[Claims]   1. Realistic over a coverage area in simulcast wireless communication systems Deployed in geographically dispersed locations to provide qualitatively continuous wireless coverage An apparatus for identifying a communication cell among the plurality of communication cells,   The plurality of communication cells,   A central controller coupled to the plurality of communication cells for controlling the plurality of communication cells; Troll means,   The plurality of communication cells for identifying at least one of the plurality of communication cells. A portable communication unit that communicates wirelessly with at least one of the   An identification bit pattern coupled to the plurality of communication cells and for the plurality of communication cells; The transmission of the identification bit pattern is in a plurality of communication cells adjacent to each other. Are received simultaneously from one another, thereby generating a disturbing bit pattern The identity of some of the plurality of received communication cells is Analysis of the transmitted disturbing bit pattern by the portable communication unit Assignment means for recursively assigning to a subset of a plurality of communication cells Wherein said subset includes some of said plurality of received communication cells. Things,   An apparatus for identifying a communication cell comprising:   2. The allocating means comprises a The first part is constant in a first direction from any message cell to any adjacent message cell And in the second direction any communication cell to any adjacent communication cell Defining means for defining a pattern that changes to the second direction. Is substantially orthogonal to the first direction, and the defining means further comprises the identification bit path. The second portion of each of the turns is any adjacent cell from any message cell in the second direction. To any communication cell, and from any communication cell in the first direction to any communication cell. Defining a pattern that changes to an adjacent communication cell, and the defining means Furthermore, a third portion of each of said identification bit patterns is located in said coverage area. A pattern for uniquely identifying one of the plurality of communication cells. 2. The device according to claim 1, wherein the device comprises:   3. further,   The assigned identification bit pattern coupled to the assignment means and thereafter periodically. Cell transmission for transmitting a call from the plurality of communication cells as simulcast transmission. means,   The plurality of communications by the portable communication unit coupled to the cell transmitting means; Receiving said simulcast transmission from more than one of the cells, thereby receiving Receiver means in the portable communication unit for demodulating a received disturbing bit pattern And   The interference received by the portable communication unit coupled to the receiver means. By analyzing the harmful bit pattern, An identification means for identifying a subset of a plurality of communication cells, wherein the subset is Including more than one of the plurality of received communication cells;   The device of claim 1 comprising:   4. Further, an identified subset of the plurality of communication cells coupled to the identification means. From the portable communication unit to at least one of the plurality of communication cells. And a report in the portable communication unit for further reporting to the central control means. 4. The device according to claim 3, comprising notification means.   5. Further, a reported identity of the plurality of communication cells coupled to the reporting means. The portable communication unit is changed from one of the plurality of communication cells that does not belong to another subset. Terminating means in the central control means for terminating transmission of communication to the knit; The device of claim 4, wherein   6. further,   The portable communication unit coupled to the plurality of communication cells and the portable communication unit. Received interference bit pattern expected in the service area to which the Combined with said plurality of communication cells for programming with information defining a turn Program means in the central control means, wherein the service area is Consisting of selected parts of the coverage area, and   The portable communication unit being in the portable communication unit and coupled to the program means; By the communication unit Interference specified as to be expected in the service area from the rammed information In response to receiving the harm bit pattern, the portable communication unit Area within the service area, and furthermore, In response to receiving a disturbing bit pattern not specified as A processor for determining that the band communication unit is not in the service area. Means   4. The device according to claim 3, comprising:   7. Further, the portable communication unit is coupled to the plurality of communication cells, and Expected jamming in the service area to which the band communication unit is assigned. Said central system for reprogramming with new information redefining the cut pattern Reprogramming means in the control means, wherein the reprogramming is performed by the plurality of communication cells. Wireless communication between at least one of the portable communication units The device of claim 6, wherein   8. Further, the portable communication unit coupled to the processor means is a The processor means has determined that it is not within the specified service area. Prior to generating an alarm to notify the user of the portable communication unit according to 7. The device according to claim 6, comprising alarm means in the portable communication unit.   9. Further, the processor is coupled to the processor means. Service area where the portable communication unit is currently defined by Message from the portable communication unit in response to the determination that the To at least one of the plurality of communication cells and then to the central control means 7. A response transmitter means in said portable communication unit for providing The described device.   10. Additionally, the plurality of communication cells coupled to the response transmitter means and further comprising: Coupled to the portable communication unit expected in the service area The portable communication unit is provided with new information that redefines the received jamming bit pattern. Reprogramming means in said central control means for reprogramming the unit. The re-program is performed in response to a message transmitted from the response transmitter means. To be performed,   The redefined reception jamming bit pattern is the currently defined service area. Associated with a subset of the plurality of communication cells identified by the Things, and   The reprogramming may include communicating with at least one of the plurality of communication cells and the portable communication. Apparatus according to claim 9, performed by wireless transmission to and from a communication unit.   11. In a simulcast wireless communication system with multiple communication cells Geography to provide substantially continuous wireless coverage over the coverage area Dispersed A portable communication unit for identifying a communication cell among a plurality of communication cells arranged at a location. And   Receiving a simulcast transmission from more than one of the plurality of communication cells; A receiver element for demodulating the reception disturbing bit pattern thereby.   By analyzing the received disturbing bit pattern coupled to the receiver element; An identification element for identifying a subset of the plurality of communication cells, wherein the subset Comprises more than one of said plurality of received communication cells,   A service element coupled to the receiver element and to which the portable communication unit is assigned. The plurality of communication cells defining a reception disturb bit pattern expected at the rear For storing programmed information received from at least one of the A service element, wherein the service area is a selected one of the coverage areas. Consisting of parts, and   The service area from the programmed information coupled to the memory element; Received a disturbing bit pattern specified as expected in Determining that said portable communication unit is within said service area accordingly; Not further defined as to be expected in the service area The portable communication unit responds to the reception of the interference bit pattern by the portable communication unit. A processor for determining that it is not in the service area,   A portable communication unit comprising:   12. Further, the identification of the plurality of communication cells coupled to the identification element. Report for reporting the subset obtained to at least one of the plurality of communication cells The portable communication unit according to claim 11, comprising an element.   13. Further, the portable device is coupled to the processor by the processor. If it is determined that the communication unit is not within the currently specified service area And for generating an alert to notify the user of the portable communication unit accordingly The portable communication unit according to claim 11, comprising an alarm element.   14． Further, the portable device is coupled to the processor by the processor. If it is determined that the communication unit is not within the currently specified service area A message from the portable communication unit in the plurality of communication cells in accordance with 12. A response transmitter according to claim 11, comprising a response transmitter for transmitting to at least one of the following. Portable communication unit.