JPH07504555A - Wireless PBX systems that use frequency scanners for channel identification - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 9. The identifier of the selected communication resource is sent to the network controller of the wireless communication network. 8. The apparatus of claim 7, further comprising means for transmitting.

10. Communication to the scanning receiver by the network controller of the wireless communication network. 8. The apparatus of claim 7, further comprising means for transmitting an identifier of the resource. .

Can be guessed.

Wireless PBX System Using Frequency Scanner for Channel Identification Field of Invention TECHNICAL FIELD The present invention relates to communication systems, particularly those used in conjunction with private branch exchange communication systems. related to wireless communication systems.

Background of the invention Private branch exchange communication systems (PBXs) are well known. Most private branch exchanges are With separate groups of people (e.g. company employees) who need to communicate in a loop Commonly used. Private branch exchanges that provide services within a group are Limit the physical area to the general public and harmonize with company facilities and group facilities.

A private branch exchange provides communication between members of separate groups that is handled locally within the private branch exchange. advantages and does not require an association with a public switched network (PSTN).

The cost of providing communication services within a group through such local processing is reduced.

A private branch exchange can block calls for specific members or members of specific groups. It also provides other benefits such as blocking. In this case, the call block is The operator of the private branch exchange can specify whether a particular phone or a particular group in the private branch system is can prevent long-distance calls from telephones.

Cellular communication systems are also well known. Cellular communication system is a private branch exchange For systems that communicate over a wide geographic area via multiple base stations. configured to provide communication services. Each group within such a system A ground station partially overlaps adjacent service coverage areas within its service coverage area. together provide a substantially continuous coverage area to communications equipment passing through such area. arranged to provide a wide range of

Communication services within a cellular system are communication channels (fl to fn).

Such radio channels may vary depending on the requirements of the communication equipment. Am, T and τ and σ no 丞 flood can smell - (towards I 汀Servants J sī gate county you hang out, A mobile switching center (MSC) that interfaces with a large number of base stations Itching Center) Therefore, it is generally internally connected to the public line network. Through internal connection to the public network, A communication device can communicate not only with all public network subscribers, but also with other communication devices. Ru. Internal connection to the public network allows communication equipment to communicate via a private branch exchange system. , and can also communicate with telephone users within the private branch exchange.

Private branch exchange systems and cellular communication systems operate well in their respective markets. However, if it is advantageous to combine a private branch exchange system with local wireless service, There are cases where it is advantageous to coexist with the field of switching services. such a combination is used in areas such as manufacturing facilities, office buildings, and shopping districts that do not require a public network. to demonstrate the benefits of providing wireless communication services.

In-premises wireless systems have proven to be effective in using cellular channels. The campus wireless system also needs to be able to coexist with existing cellular facilities. be. Such wireless private branch exchange communication systems are It is also necessary to be able to select which channels are used. The weight of a private branch exchange Depending on the requirements and the need for wireless communication under the private branch exchange, cellular systems means and method for selecting cellular channels by wireless private branch exchanges that do not interfere with The need for law arises.

Summary of the invention In a wireless private branch exchange, the communication network, method and apparatus are Provides communication resource identification functionality. Method: Selected Spectrum Channels a stage for measuring the signal quality factor of and comparing the measured value with a threshold value. A place for network communication resources If so, the method further includes selecting a channel and exceeding a threshold.

The spectrum selected by the local cellular network is also used.

The location where the scan and threshold comparison is displayed is not used by the cellular system. channel, which is then authorized for use in the local system.

Brief description of the drawing FIG. 1 shows a block diagram of a private branch exchange including a specific wireless communication facility according to the present invention. represent.

FIG. 2 represents a block diagram of a radio intercept box according to the invention.

Detailed description of the invention In private branch exchange wireless communication systems, the solution to the channel selection problem is Evaluate communication resources based on signal measurement using a scanner It is conceptually positioned as Evaluation of communication resources is performed by scanning communication resource signals. Based on measurement and comparison to threshold values. Before being authorized for use within a private branch exchange radio system First, through the use of a scanner, candidate resources are evaluated for interference to the user. the Under such a format, all spectra are scanned and the results are Reported collectively to the radio controller or under the control of the radio controller, individual resources are The source is scanned and the values of the individual signal measurements are sent to the radio controller for comparison with the threshold. Reported.

Attention is first drawn to the functional description of the wireless private branch exchange system. Function description below In , channel selection will be explained based on one embodiment of the invention.

FIG. 1 shows a typical example of a preferred embodiment of the present invention, which provides a wireless communication service. 1 shows a block diagram of a typical private branch exchange system (10). System (10) The system includes a private branch exchange switch (11) and a wireless intercept box. (WIB) (12), signal interface (13).

A scanning receiver controller (14) and base stations 15-18 are included. Figure 1 also shows , communication devices 20-22 are shown.

The private branch exchange communication system 10 connects a subscriber (103) and an external public switched network subscriber ( (not shown) and between subscribers (103). It is composed of sea urchins. At the private branch exchange switch (11), the wired subscriber (103) A call from to another wireline subscriber arrives via an internal connection (102) under known methods. do. Calls between external public switched network subscribers and wireline subscribers (103) are also handled via private branch exchange. at the machine switch (11) in a known manner.

As an example according to the present invention, any subscriber (103) may dual service capabilities, including the ability to receive (and transmit) through either facility. have power. Such a subscriber (103) has a wireline facility (103) at a fixed location. for example, a telephone in an office) or a radio carried by the subscriber (103). Wired line services are received via transceivers (20-22).

The capability of such dual service is limited to the normal wireline acquisition subscriber line (norm al wirenne pickup 5ubscriber 1ines) (105) through the use of WIB (12). W.I.B. (12), after a certain delay, sends the wired subscriber, for example 106), to the wireless Provides functionality to forward calls addressed to a receiver (eg 20). (Alternatively, the call is , first sent to the wireless subscriber and then sent to the wireline subscriber after a delay. ) constant delay via WIB (12) and base station (15, 16, 17 or 18) depending on the and a fixed location (via wired 106) before being transferred to the wireless communication device (20). ). Between WIB (12) and base station (15-18) A radio-related signaling protocol is used to combine the signaling link l. Achieved via OO (signaling link) and subscriber link 1 This can also be accomplished via 01.

The communication devices 20-22 and base stations 15-18 are, for example, Advance Mobile ・Phono service (AMPS) ・Specified by cellular wireless telephone service, etc. Under the signaling protocol, the transmitted message is transmitted at a low power level (e.g. 10 milliwatts). configured to be exchanged. In a preferred embodiment, the activated communication device The stations 20 to 22 are connected to base stations 15 to 18 via a private branch exchange wireless system (10). The spectrum of the service request signal from any one of the two is scanned.

The base stations (15-18) are shown with a single antenna (19); The single antenna (19) of 18) is configured by an antenna circuit distribution network (23). and is coupled to base stations (15 to 18) via a coupler (not shown). scanning reception The antenna (24) is also coupled to the antenna circuit distribution network (23) via a coupler. minutes Each antenna of the arranged antennas (23) is connected to the service of the private branch exchange system. - Located throughout the coverage area (e.g. on each floor of a building). Other distributed Ann Tena (23) can cover the same or other floors.

When a subscriber (20-22) moves within the coverage area of a base station (15-18), The wireless subscriber can transmit and receive progressively via different antennas of the network (23). The distributed antenna (23) simplifies system design in that it can Make it. The distributed antennas (23) do not require complex processing and are A private branch exchange that does not require the hardware required to pass from the base station to the base station. enable the functionality of the machine radio network (10).

FIG. 2 is a block diagram of WIB 12 generally shown. As shown, Group of lines 104 enters the time slot interchange (TSI 218 ). In the preferred embodiment, the TSI218 has part number 8980 and is Seisaku (MI Oki) is a registered trademark of MI Okisha, an affiliate company of British Telecom. Ru. ). Furthermore, the TSI 218 internally connects the WIB 12 and the base stations 15 to 18. It is also coupled to the subscriber link 101 to which it is connected. The TSI 218 is the processor 206 and the I10 controller 215 that performs interface tasks between the TSI 218 and the Connect parts.

In particular, the processor 206 collects slot-to-slot connection data, subscriber wireline data, and It is combined with a data storage unit (209) that stores the relayed wireless subscriber number.

In addition, processor 206 may perform TSI control, signal digit analysis, ring detection, among other things. Program storage that stores the program that performs (ring detection) (212). Processor 206 via I10 controller 203 Coupled with signal interface 13. The signal interface 13 is connected to WIB12. A signal link 100 is provided that interconnects base stations 15-18.

The signal interface 13 receives the processor signal from the selected line of the wired group 104. It receives signal information via the sensor 206 and uses this information for its own control, for example A signaling message suitable for a subscriber such as subscriber 20 is derived. In addition, the signal input Interface 13 transmits and receives information to/from base stations 15-18.

This data is sent on the control channel or Although this is the first information, the content of the information can be expanded upon request. suitable fruit In the example, the type of signal used in the system is Types of signals used in le phono service cellular radiotelephone systems Similar to genus. As another example, the signal link 100 includes the signal interface 13 and the base stations 15-18 using messages based on the protocol. You can get it. The introduction of signal interface 13 This can also be achieved by using a computer system. A concrete example of this , the signaling interface 13 etc. makes a request based on the call record and information progress. statistics information can be maintained.

The base stations 15 to 18 in FIG. 1 each have overhead information (□vCrhead information), pages and proper channel arrangement to a wireless subscriber (20-22), such as wireless subscriber 20. in the opposite direction , the base stations (15-18) respond to the page and the wireless subscribers (20-22) receiving the origin of the call request; The signal link (100) is a wireless system or , what data link protocols (e.g. high-level data link current protocol messages required by HDLC). The above information (between the base stations (15-18) and the WIB (12)) of the form is conveyed.

Referring to FIG. 1, the WIB 12 has trunk group ) has the ability to monitor the data flow of individual trunks from 109. suitable In one embodiment, trunk group 109 has 24 channels of pulse code modulation. (PCM), 1.544 megabits per second (Mbps), (DSL) service? It will be. In this case, the least significant bit of every 6th DSO slot is the signal Information related to trunk activation ([runk 5eizure)], calling number, disconnection, etc. Including. (For further information, see Geneva, Switzerland, November 25, 1988. CCITT Bluebook Specification G, 704. G, 7 33. See G, 734. ) Signal from trunk group 109 The information is assembled into message formats and protocols such as HDLC. The signal is transferred to the signal interface 13, which is used as a signal interface. The content of the message is It takes the form Ill“° or °゛0°” and is interpreted at the signal interface 13. be done.

Delivery of the call to subscriber 103 (e.g., on wireline 106) is accomplished by the present invention as follows: It becomes a cage. The wired user 103 is contacted by the calling party (for example, from the public switched network) When the call from the private branch exchange (11) is received by the private branch exchange (11), the private branch exchange (11) The call is routed to the wire 106 using conventional techniques.

WIB (12) performs activation (link) for wired subscriber 103 (on wired 106). signal) and starts delaying the time. After a fixed delay WIB (12) is , determines the corresponding mobile phone number of the wireless subscriber 20 and uses this information 203 to and it to the signal interface 13.

The signal interface 13 then connects all base stations 15 via the signal link 100. Baging message for wireless subscriber 20 sent to other stations (15 to 18) 8) If not used, the page will contain a unique identification to accompany the wireless subscriber 20. It is possible to transport children. In the wireless system, signal information is transmitted from base stations 15 to 1. 8, but private branch exchange 12 accepts the call from the public switched network as a wired call. information and prepare the call accordingly. Information is sent via TSI218 Frequency (RF) channels continue to be monitored via subscriber link 101.

When receiving the page, the wireless subscriber 20 selects unused base stations (15 to 15) in the system. 18). response from wireless subscriber 20 The receiving unused base station (e.g. 17) connects subscriber link 1 towards WIB 12. Assign an appropriate line (110) from 01 and connect the wired group via TSI218. It is internally connected to an appropriate line (106) using the line 104 as an intermediary. Internal connections (10 6 and 110) is completed, the communicating base station (17) 0, the result is a ring signal. When wireless subscriber 20 answers the call, The communicating base station (17) provides the final connection and receives wireless access from the calling party. To establish communication to subscriber 20, subscriber link 101 (via WIB 12) is and sends an off-hook signal to private branch exchange 11.

The initiation of a call from wireless subscriber 20 to a destination (e.g., public switched network) is as follows: will be achieved. If unused, the wireless subscriber 20 sends the unused protocol. is on an unused channel that supports Wireless subscriber 2o uses a standard timetable such as protocol can also be used.

7 or 18 is then off hook. Dial tone from private branch exchange 11 Upon receiving the wireless subscriber 20, the corresponding base station 15, 16, 17 or 18 At this point, the call can proceed as a normal wired call using the private branch exchange wireless system. for scanning channels used for channel identification purposes within the system (10). Ru. The processor (206) generates such a scan within the processor (206). is directed via a command issued to direct the scanning of the I channel.

be removed from the list.

It is possible.

Claims (10)

[Claims] 1. Located within the service coverage area of a cellular communications system and equipped with cellular communications resources. In a wireless private branch exchange communication network that reuses network resources, How to identify the source; Measuring the signal quality coefficient of the communication resources of the cellular system; using the measured value as a threshold; a comparing step; and If the measured value exceeds the threshold, select the communication resource as the network communication resource. step; A method characterized by comprising: 2. Measure, compare and select for each communication resource within the selected spectrum. 2. The method of claim 1, further comprising the step of restoring. 3. The identifier of the selected communication resource is sent to the network controller of the wireless communication network. 3. The method of claim 2, further comprising the step of transmitting. 4. Communication resources are transferred to the scanning receiver by the network controller of the wireless communication network. The method of claim 1, further comprising the step of transmitting a source identifier. 5. Upon receiving the identifier, the scanning receiver measures the signal quality factor of the communication resource. 5. The method of claim 4, further comprising the step of: 6. a step of transmitting the measured signal quality coefficient of the communication resource to the network controller; 6. The method of claim 5, further comprising: 7. Located within the service coverage area of a cellular communications system and equipped with cellular communications resources. In a wireless private branch exchange communication network that reuses network resources, The device for identifying the source is; A means of measuring the signal quality factor of communication resources of a cellular system; means of comparison; and If the measured signal quality factor exceeds the threshold, the network communication resource is means of selecting credit resources; A device characterized by comprising: 8. Measure, compare and select for each communication resource within the selected spectrum. 8. The apparatus of claim 7, further comprising means for restoring. 9. The identifier of the selected communication resource is sent to the network controller of the wireless communication network. 8. The apparatus of claim 7, further comprising means for transmitting. 10. Communication to the scanning receiver by the network controller of the wireless communication network 8. The apparatus of claim 7, further comprising means for transmitting an identifier of the resource. .