CA2280066A1 - Paging on cellular network - Google Patents
Paging on cellular network Download PDFInfo
- Publication number
- CA2280066A1 CA2280066A1 CA002280066A CA2280066A CA2280066A1 CA 2280066 A1 CA2280066 A1 CA 2280066A1 CA 002280066 A CA002280066 A CA 002280066A CA 2280066 A CA2280066 A CA 2280066A CA 2280066 A1 CA2280066 A1 CA 2280066A1
- Authority
- CA
- Canada
- Prior art keywords
- cid
- identification information
- caller identification
- command
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A system for communicating multiple page messages or pages via Caller Identity (CID), Caller Line Identity (CLI) or Calling Number Identification (CNID) information to a cellular-compatible receiving device and combining the data obtained from each received CID, CLI, CNID page to form an aggregate message comprising a data sequence.
Description
Field of Invention The present invention relates generally to data communications systems and more particularly relates to a system for communicating a message by sending a sequence of Caller Identification information via a control channel of a cellular network control channel for a cellular mobile radiotelephone system.
Background of the Invention From its introduction, Publicly Switched Telephone Network has typically 1 o been used to pass information between various parties connected to it.
With the advent of modems, electronic equipment at remote sites, such as security panels, vending machines, environment monitoring systems, meters, load management system, etc, etc, send information to a central location or a central clearing house via the Publicly Switched Telephone Network.
Currently, to send information to a central clearing house, a modem at a remote site, goes off hook, dials the telephone number of a modem at the central clearing house, waits for an answer, sends the information electronically and then hangs-up.
As a number of remote sites call into the central clearing house at a same time, a number of telephone lines are connected between the Publicly Switched Telephone Network and the central clearing house. If one telephone line is busy, the remote site dials the telephone number of the next line.
Background of the Invention From its introduction, Publicly Switched Telephone Network has typically 1 o been used to pass information between various parties connected to it.
With the advent of modems, electronic equipment at remote sites, such as security panels, vending machines, environment monitoring systems, meters, load management system, etc, etc, send information to a central location or a central clearing house via the Publicly Switched Telephone Network.
Currently, to send information to a central clearing house, a modem at a remote site, goes off hook, dials the telephone number of a modem at the central clearing house, waits for an answer, sends the information electronically and then hangs-up.
As a number of remote sites call into the central clearing house at a same time, a number of telephone lines are connected between the Publicly Switched Telephone Network and the central clearing house. If one telephone line is busy, the remote site dials the telephone number of the next line.
Conventional radiotelephones generally offer both voice and data communications capabilities and, accordingly, the radiotelephone service is generally supplied at a cost that is commensurate with combined voice and data services. Nevertheless, this combination of both voice and data communications may exceed a user's requirement for communicating by only voice or data. In addition, real-time voice or data communications is not always desirable by a user who wishes only to receive a message without having a current activity disturbed. Similar to two-way radios, the frequency spectrum for the cellular mobile radiotelephone {CMR) system radio 1 o channels, particularly voice channels, is a limited resource.
Radiopaging system is used for users who wish to receive a message without having their current activity disturbed.
Radiopaging systems include pagers, which are miniature receivers, and at least one radiopaging terminal having a transmitter that covers a selected geographic area containing numerous pagers. To respond to a page received via the conventional one-way radiopaging system, the paged party typically must find an available conventional telephone and initiate a telephone call to 2 o the party that initiated the page. Alternatively, the paged party can place a responsive call by use of a mobile radiotelephone, if available. Radiopaging systems having two-way communications capability for receiving a page and transmitting an acknowledge receipt of a page are also known. Such paging acknowledgment systems are most useful for local area "on-site"
2 s communications systems in view of the power limitations of the transmitters associated with the pagers.
Present radiopaging acknowledgment systems require a large capital investment for the purchase and installation of equipment to implement a two-s way communications system that covers a wide communications area because the number of acknowledgment receivers (and transmitters) is a function of the limited transmitting power of the transmitter associated with each of the pagers. Although the radiopaging industry is interested in supplying a page acknowledgment to subscribers of paging services, the cost of implementing 1 o the paging acknowledgment system has discouraged many service providers from installing such paging acknowledgment systems.
Canadian Patents 2,242,272 and 2,242,272, patented by the inventors, teaches a method of transmitting data using Caller Identity (CID) information 15 between a Central Station and remote sites.
Currently, within a CMR system, CID information is transmitted over a control channel. This CID information is received by all CMR tuned to the control channel. CMR can be modified to monitor the control channel for a 2 o page from a Mobile Switching Center (MSC) and also the CID data sent over the control channel. Thus, a page from MSC puts the CMR in voice mode and a matching or partly matching CID of a Central Station becomes a general global page to all CMR that have a matching or partly matching CID
in memory.
Radiopaging system is used for users who wish to receive a message without having their current activity disturbed.
Radiopaging systems include pagers, which are miniature receivers, and at least one radiopaging terminal having a transmitter that covers a selected geographic area containing numerous pagers. To respond to a page received via the conventional one-way radiopaging system, the paged party typically must find an available conventional telephone and initiate a telephone call to 2 o the party that initiated the page. Alternatively, the paged party can place a responsive call by use of a mobile radiotelephone, if available. Radiopaging systems having two-way communications capability for receiving a page and transmitting an acknowledge receipt of a page are also known. Such paging acknowledgment systems are most useful for local area "on-site"
2 s communications systems in view of the power limitations of the transmitters associated with the pagers.
Present radiopaging acknowledgment systems require a large capital investment for the purchase and installation of equipment to implement a two-s way communications system that covers a wide communications area because the number of acknowledgment receivers (and transmitters) is a function of the limited transmitting power of the transmitter associated with each of the pagers. Although the radiopaging industry is interested in supplying a page acknowledgment to subscribers of paging services, the cost of implementing 1 o the paging acknowledgment system has discouraged many service providers from installing such paging acknowledgment systems.
Canadian Patents 2,242,272 and 2,242,272, patented by the inventors, teaches a method of transmitting data using Caller Identity (CID) information 15 between a Central Station and remote sites.
Currently, within a CMR system, CID information is transmitted over a control channel. This CID information is received by all CMR tuned to the control channel. CMR can be modified to monitor the control channel for a 2 o page from a Mobile Switching Center (MSC) and also the CID data sent over the control channel. Thus, a page from MSC puts the CMR in voice mode and a matching or partly matching CID of a Central Station becomes a general global page to all CMR that have a matching or partly matching CID
in memory.
Summary of the Invention The present invention solves the problems of the prior art by providing a system for communicating a data sequence from a MSC to a cellular-compatible device via a cellular network control channel of a CMR system, without modifying the existing standard structure or format of the cellular network control channel. Telecommunications service suppliers have already installed the necessary equipment to support nationwide communications via CMR networks. The inventors have recognized that a CMR system 1 o represents an existing communications architecture which can be adapted in a novel manner to supply data communications and radiopaging capability with minimal impact upon the well known voice communications offered by the cellular mobile radiotelephone network. The present invention takes advantage of this installed base of communication equipment by using the control channel of the CMR system for data communications and radiopaging between a central location and one or more remote sites.
Briefly described, the CMR monitors the control channel for a matching page and also the CID information with a predetermined identifying characteristic.
2 o A matching page on the control channel puts the CMR into voice or data mode of communication while a CID with a predetermined identifying characteristic is used as a broadcast message from the MSC. A sequence of CID, sent over the control channel is assembled into a message for the CMR.
2 s By giving each different CID message a bit weight, a compressed data message can be broadcasted over the CMR system by the MSC.
Brief Description of the Drawings 5 In drawings which illustrate by way of example only a preferred embodiment of the present invention, Figure 1 is a block diagram of one embodiment of the present invention; and 1 o Figure 2 is a is a diagram that shows the binary weight given to each call dialing interface;
Detailed Description of the Invention As shown in Figure 1, in one embodiment the present invention comprises a load management system generally shown as 10. The Cellular Mobile Radio 22 monitors the cellular control channel for page from a MSC 16, via local antenna 40. CID decoder 24 monitors the control channel via local antenna 40 also, for CID information with a predetermined identifying characteristic from 2 o a central computer 12. Although the present invention is of general application, preferred embodiments of the present invention in relation to electrical load management system will now be described for ease of understanding.
2 s Turning now to Figures 1, an electrical load management system in accordance with the present invention is shown and is generally indicated to by reference numeral 10. Electrical load management system 10 is designed to monitor and control electrical usage at a remote site 38.
At remote site 38, a profile of electrical usage is maintained by controller by reading electrical meter 32 at pre-set intervals and electrical load 36 is controlled via switch 34.
During operations, to reach a particular remote site 38, central computer 12 1 o dials the telephone number of a remote site by using a call dialing interface 42. The telephone number of the remote site is sent to MSC 16 by call dialing interface 42 via PSTN 14. MSC 16 forwards the telephone number to cell site 20 which transmits the telephone number and CID information over a control channel. CMR 22, within the CMR system, attempts to match the telephone number received via the control channel to internal memory, not shown. The CMR with a matching phone number informs the controller 30 of the page match via channel 26. Controller 30 responds to the match by changing from idle mode to data mode of operation and responds to central computer 12 by sending back the load profile from its memory, not show. Thus the central 2 o computer 12 reads the load profile form a remote site 38.
To control an electrical load on a global basis an appropriate code has to be sent to all remote sites at the same time. Central computer 12 selects the code to send by selecting a call dialing interface 42 having a telephone number 2 s whose last digit represent the desired code to be transmitted. The computer 12 then instructs the appropriate call dialing interface 42 to dial the telephone number. In response, the call dialing interface 42 dials the telephone number via PSTN 14. PSTN 14 in turn directs the call to MSC 16 together with CLI
data identifying the call dialing interface 42. MSC 16 forwards this information to cell site 20 which transmits the telephone number and CID
information over the control channel. CID decoder 24 receives the information over the airwave via local antenna 40 and in turn extracts and interprets the last digit of the CID data sent over the control channel. The last digit of the CID data, which represent the code, cause the controller 30 to 1 o take the necessary action corresponding to the code, such as turning the electrical load 36 off via switch 34.
Thus, the central computer 12 can page a particular remote site 38 by dialing the telephone number of the remote site 38 via call dialing interface 42.
Central computer can also send a global message to all remote sites by using the appropriate call dialing interface 42 who's CID information matches the code to be sent globally to all remote sites 38.
To ensure maximum information is sent, to remote site 38 per each global 2 o message, a data compression concept is used by central computer 12. To compress the data, each call dialing interface 42 is given a binary bit weight as shown in Figure 2. To send code 5 globally, central computer 12 uses call dialing interface 42 with binary weight of 0 and 4. CID decoder 24 receives 2 CID messages and forwards them to controller 30 which in turn decodes them 2 5 to code 5 by using the binary weights on each message in sequence.
Briefly described, the CMR monitors the control channel for a matching page and also the CID information with a predetermined identifying characteristic.
2 o A matching page on the control channel puts the CMR into voice or data mode of communication while a CID with a predetermined identifying characteristic is used as a broadcast message from the MSC. A sequence of CID, sent over the control channel is assembled into a message for the CMR.
2 s By giving each different CID message a bit weight, a compressed data message can be broadcasted over the CMR system by the MSC.
Brief Description of the Drawings 5 In drawings which illustrate by way of example only a preferred embodiment of the present invention, Figure 1 is a block diagram of one embodiment of the present invention; and 1 o Figure 2 is a is a diagram that shows the binary weight given to each call dialing interface;
Detailed Description of the Invention As shown in Figure 1, in one embodiment the present invention comprises a load management system generally shown as 10. The Cellular Mobile Radio 22 monitors the cellular control channel for page from a MSC 16, via local antenna 40. CID decoder 24 monitors the control channel via local antenna 40 also, for CID information with a predetermined identifying characteristic from 2 o a central computer 12. Although the present invention is of general application, preferred embodiments of the present invention in relation to electrical load management system will now be described for ease of understanding.
2 s Turning now to Figures 1, an electrical load management system in accordance with the present invention is shown and is generally indicated to by reference numeral 10. Electrical load management system 10 is designed to monitor and control electrical usage at a remote site 38.
At remote site 38, a profile of electrical usage is maintained by controller by reading electrical meter 32 at pre-set intervals and electrical load 36 is controlled via switch 34.
During operations, to reach a particular remote site 38, central computer 12 1 o dials the telephone number of a remote site by using a call dialing interface 42. The telephone number of the remote site is sent to MSC 16 by call dialing interface 42 via PSTN 14. MSC 16 forwards the telephone number to cell site 20 which transmits the telephone number and CID information over a control channel. CMR 22, within the CMR system, attempts to match the telephone number received via the control channel to internal memory, not shown. The CMR with a matching phone number informs the controller 30 of the page match via channel 26. Controller 30 responds to the match by changing from idle mode to data mode of operation and responds to central computer 12 by sending back the load profile from its memory, not show. Thus the central 2 o computer 12 reads the load profile form a remote site 38.
To control an electrical load on a global basis an appropriate code has to be sent to all remote sites at the same time. Central computer 12 selects the code to send by selecting a call dialing interface 42 having a telephone number 2 s whose last digit represent the desired code to be transmitted. The computer 12 then instructs the appropriate call dialing interface 42 to dial the telephone number. In response, the call dialing interface 42 dials the telephone number via PSTN 14. PSTN 14 in turn directs the call to MSC 16 together with CLI
data identifying the call dialing interface 42. MSC 16 forwards this information to cell site 20 which transmits the telephone number and CID
information over the control channel. CID decoder 24 receives the information over the airwave via local antenna 40 and in turn extracts and interprets the last digit of the CID data sent over the control channel. The last digit of the CID data, which represent the code, cause the controller 30 to 1 o take the necessary action corresponding to the code, such as turning the electrical load 36 off via switch 34.
Thus, the central computer 12 can page a particular remote site 38 by dialing the telephone number of the remote site 38 via call dialing interface 42.
Central computer can also send a global message to all remote sites by using the appropriate call dialing interface 42 who's CID information matches the code to be sent globally to all remote sites 38.
To ensure maximum information is sent, to remote site 38 per each global 2 o message, a data compression concept is used by central computer 12. To compress the data, each call dialing interface 42 is given a binary bit weight as shown in Figure 2. To send code 5 globally, central computer 12 uses call dialing interface 42 with binary weight of 0 and 4. CID decoder 24 receives 2 CID messages and forwards them to controller 30 which in turn decodes them 2 5 to code 5 by using the binary weights on each message in sequence.
As indicated in Canadian Patents 2,242,272 and 2,242,272, patented by the inventors, the remote site 38, ships the data to the central computer 12 by using CID information. Again compression concept as shown above can be used to transmit the data.
Most electronic equipment, such as security panels, vending machines, environment monitoring systems, meters, load management system, etc, etc, at remote sites, have a need to receive short information messages via a Publicly Switched Telephone Network.
to A preferred embodiment of the invention having thus been described by way of example only, it will be apparent to those skilled in the art that modifications and adaptations may be made without departing from the scope of invention, as set out in the appended claims.
Most electronic equipment, such as security panels, vending machines, environment monitoring systems, meters, load management system, etc, etc, at remote sites, have a need to receive short information messages via a Publicly Switched Telephone Network.
to A preferred embodiment of the invention having thus been described by way of example only, it will be apparent to those skilled in the art that modifications and adaptations may be made without departing from the scope of invention, as set out in the appended claims.
Claims (16)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE
DEFINED AS FOLLOWS:
1. A method for communicating with a selected one of a plurality of cellular communications devices by sending multiple pages via a cellular network control channel of a cellular mobile radiotelephone (CMR) system, comprising the steps of:
monitoring the cellular network control channel for Caller Identification information (CID) having a predetermined characteristic; and responsive to receiving Caller Identification information (CID) containing the command, combining data from each of the Caller Identification information (CID) to form an aggregate data message containing a sequence of the data.
monitoring the cellular network control channel for Caller Identification information (CID) having a predetermined characteristic; and responsive to receiving Caller Identification information (CID) containing the command, combining data from each of the Caller Identification information (CID) to form an aggregate data message containing a sequence of the data.
2. The method of claim 1 further comprising the steps of:
monitoring the cellular network control channel for one of the Caller Identification information (CID) containing another command in response to receiving the command Caller Identification information (CID);
verifying the data sequence of the aggregate data message in response to receiving the Caller Identification information (CID) containing the other command.
monitoring the cellular network control channel for one of the Caller Identification information (CID) containing another command in response to receiving the command Caller Identification information (CID);
verifying the data sequence of the aggregate data message in response to receiving the Caller Identification information (CID) containing the other command.
3. The method of claim 2 further comprising the step of discarding the data sequence in the event that a verification term of the other command Caller Identification information (CID) does not match a verification value calculated with the data of the data sequence.
4. The method of claim 2 further comprising the step of discarding the data sequence in the event that the other command Caller Identification information (CID) is not received within a certain maximum time period
5. The method of claim 2 further comprising the step of discarding the data sequence in the event that a time period between any pair of received command Caller Identification information (CID) exceeds a certain maximum time period.
6. The method of claim 2 further comprising the step of discarding the data sequence in response to receiving more than a predetermined number of Caller Identification information (CID) containing the command while monitoring the cellular network control channel.
7. The method of claim 2 further comprising the step of responding to the verification of the data sequence by operating on the data sequence in accordance with the command.
8. The method of claim 1, wherein the data combining step comprises ordering the data of each received command page based on the arrival of the corresponding command Caller Identification information (CID) at the selected cellular communication device.
9. The method of claim 1, wherein the data combining step comprises ordering each received command Caller Identification information (CID) in sequential order based on a numerical value contained in each command page.
10. The method of claim 9, wherein the numerical value is part of a compressed data message.
11. The method of claim 1, wherein the step of receiving one of the Caller Identification information (CID) having a predetermined characteristic comprises the steps of:
comparing at least a portion of the received Caller Identification information (CID) having the predetermined characteristic to a mask stored in memory of each cellular communications device; and accepting the Caller Identification information (CID) in the event that the portion of the page matches the mask.
comparing at least a portion of the received Caller Identification information (CID) having the predetermined characteristic to a mask stored in memory of each cellular communications device; and accepting the Caller Identification information (CID) in the event that the portion of the page matches the mask.
12. The method of claim 10, wherein the Caller Identification information (CID) having the predetermined characteristic is formatted to represent at least a portion of a telephone number (MIN).
13. The method of claim 1, wherein the step of receiving one of the Caller Identification information (CID) having a specific identifier comprises comparing at least a portion of the received Caller Identification information (CID) having the specific identifier to one of a set of masks stored in memory of the selected cellular communications device; and accepting the Caller Identification information (CID) in the event that the least a portion of the page matches one of the set of masks.
14. The method of claim 1, wherein the step of monitoring the cellular network control channel for one of the Caller Identification information (CID) having a specific identifier assigned to the selected cellular communications device comprises:
monitoring the cellular network channel for a certain time period after receiving one of the Caller Identification information (CID) having the predetermined characteristic; and terminating the monitoring step in the event that the certain time period expires without receiving one of the Caller Identification information (CID) having the specific identifier.
monitoring the cellular network channel for a certain time period after receiving one of the Caller Identification information (CID) having the predetermined characteristic; and terminating the monitoring step in the event that the certain time period expires without receiving one of the Caller Identification information (CID) having the specific identifier.
15. The method of claim 1, wherein the command defines an action for the selected cellular communications device to set a predetermined time for a timer device connected to the selected cellular communications device, and the data sequence comprises timing data values corresponding to the predetermined time.
16. The method of claim 1, wherein the command defines an action for the selected cellular communications device to accept data values contained in a certain portion of each Caller Identification information (CID) containing the command, and to provide the data sequence comprising the data values to a device external to the selected cellular communications device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002280066A CA2280066A1 (en) | 1999-08-11 | 1999-08-11 | Paging on cellular network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002280066A CA2280066A1 (en) | 1999-08-11 | 1999-08-11 | Paging on cellular network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2280066A1 true CA2280066A1 (en) | 2001-02-11 |
Family
ID=4163950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002280066A Abandoned CA2280066A1 (en) | 1999-08-11 | 1999-08-11 | Paging on cellular network |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2280066A1 (en) |
-
1999
- 1999-08-11 CA CA002280066A patent/CA2280066A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20030811 |