EP1142383A1 - A method for the management of subscriber stations in a tetra system - Google Patents
A method for the management of subscriber stations in a tetra systemInfo
- Publication number
- EP1142383A1 EP1142383A1 EP00969622A EP00969622A EP1142383A1 EP 1142383 A1 EP1142383 A1 EP 1142383A1 EP 00969622 A EP00969622 A EP 00969622A EP 00969622 A EP00969622 A EP 00969622A EP 1142383 A1 EP1142383 A1 EP 1142383A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mobile exchange
- tei
- dxt
- serial number
- eir
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
Definitions
- the present invention relates to a TETRA (Terrestrial Trunked Radio) system and particularly to management of subscriber stations in the TETRA system.
- a TEI (Tetra Equipment Identity) serial number is determined for subscriber stations. Said TEI serial number is conveyed in specific situations from the subscriber station to the mobile exchange. Call establishment is one of these situations, when the subscriber station sends its TEI serial number over the radio path to a base station, wherefrom it is forwarded to the mobile exchange. On the basis of the TEI serial number the mobile exchange is able to identify the subscriber station concerned.
- the object of the present invention is to solve the above problem and to provide a solution which enables monitoring of the subscriber stations in the TETRA system. This is achieved by a method of the invention for handling the TEI serial number of the subscriber station in the TETRA system, in which method the mobile exchange receives the TEI serial number of the subscriber station.
- the method of the invention is characterized by transmitting the TEI serial number in an enquiry message from the mobile exchange of the TETRA system to a GSM-EIR equipment register, whose memory maintains data on the subscriber stations whose calls are to be handled in a predetermined manner; checking whether the TEI serial number transmitted to the equipment register is included in the data stored therein; and transmitting a response message indicating the result of checking from the GSM-EIR equipment register to the mobile exchange of the TETRA system.
- the invention further relates to a TETRA system comprising a mobile exchange, a subscriber station, for which is determined a subscriber- station-specific TEI serial number, and which comprises means for establishing a connection to a second subscriber station via the mobile exchange, or alternatively, on a direct-mode channel, and a base station having a data transmission connection to the mobile exchange and comprising means for receiving the TEI serial number transmitted by the subscriber station over the radio path and forwarding the same to the mobile exchange.
- a TETRA system comprising a mobile exchange, a subscriber station, for which is determined a subscriber- station-specific TEI serial number, and which comprises means for establishing a connection to a second subscriber station via the mobile exchange, or alternatively, on a direct-mode channel, and a base station having a data transmission connection to the mobile exchange and comprising means for receiving the TEI serial number transmitted by the subscriber station over the radio path and forwarding the same to the mobile exchange.
- the TETRA system is characterized in that the mobile exchange is connected via a data transmission connection to a GSM-EIR equipment register, in which are stored data on the subscriber stations whose calls are to be handled in a predetermined manner, which equipment register comprises means for receiving the TEI serial number from the mobile exchange of the TETRA system; that the mobile exchange comprises means for transmitting the received TEI serial number to the equipment register; and that the GSM- EIR equipment register is arranged to check whether the TEI serial number received from the mobile exchange is included in the data stored in the equipment register and to transmit a message indicating the result of checking to the mobile exchange.
- GSM-EIR equipment register in which are stored data on the subscriber stations whose calls are to be handled in a predetermined manner
- the equipment register comprises means for receiving the TEI serial number from the mobile exchange of the TETRA system
- the mobile exchange comprises means for transmitting the received TEI serial number to the equipment register
- the GSM- EIR equipment register is arranged to check whether the TEI serial
- the invention is based on the idea that an operator in the TETRA system can more effectively than before manage and monitor the subscriber stations employing the system, when the TETRA system is supplemented with an equipment register which allows the mobile exchange to find out, on the basis of the TEI serial number received, whether the calls of the subscriber station in question should be handled in any particular manner predetermined by the operator.
- the operator can store in the equipment register, for instance, information that during the calls of a given subscriber station the TETRA system carries out some extra measurings in order to provide additional information on the operation of the subscriber station.
- the operator can store in the equipment register information that all the calls of the subscriber station concerned should be blocked. This may be necessary, for instance, if the subscriber station is stolen.
- the equipment register can be provided in the TETRA system by adopting a GSM- EIR equipment register which comprises communication means for receiving the TEI serial number from the mobile exchange of the TETRA system and for transmitting a message indicating the result of checking to the mobile ex- change of the TETRA system.
- the GSM-EIR equipment register (Global System for Mobile Communications, Equipment Identity Register) refers to an EIR equipment register designed for the GSM system, the EIR equipment register being provided with necessary means in order to be able to communicate with the mobile exchange of the TETRA system. According to the invention, this avoids the need to design from the very beginning a particular equipment register intended for the TETRA system.
- the TETRA system can adopt the equipment register designed for the GSM system with necessary modifications to enable said equipment register to communicate with the mobile exchange of the TETRA system.
- the main advantages of the system according to the invention are that the invention enables more efficient management and monitoring of the subscriber station in the TETRA system without having to design an entirely new EIR equipment for the TETRA system. Instead, it is possible to utilize the results of GSM-EIR designing to a great extent. Considerable cost savings are achieved with this solution.
- Figure 1 is a flow chart of a first preferred embodiment according to the invention.
- Figure 2 is a block diagram of a first preferred embodiment of a TETRA system according to the invention.
- Figure 1 is a flow chart of a first preferred embodiment according to the invention. The flow chart of Figure 1 can be applied to a TETRA system, for instance.
- a mobile exchange receives a TEI serial number from a subscriber station. For instance, it can be a situation where a user is making a call with the subscriber station, whereby the subscriber station, in conjunction with other signalling, transmits in a manner known per se its TEI serial number to the mobile exchange of the TETRA system.
- the mobile exchange transmits the received TEI serial number to the equipment register. It is assumed in the block diagram of Figure 1 that the register is the GSM-EIR equipment register.
- an enquiry message is subjected to necessary modifications in order to make it compatible with the GSM-EIR equipment register. Since the enquiry message originates from the mobile exchange of the TETRA system, it must be modified in most occasions in order that the GSM-EIR equipment register would be able to handle it.
- the enquiry message need not be ap- plied to the GSM-EIR register through a MAP interface, as is done in the GSM system. Instead, it is possible to retrieve from the data section of the enquiry message only the TEI serial number which will be applied to the GSM-EIR equipment register together with a message identifier.
- the message identifier is selected to be the same as the one used in the GSM system.
- the TEI serial number and the message identifier are applied to the GSM-EIR equipment register.
- the equipment register maintains lists on subscriber stations such that the memory of the equipment register comprises e.g. a white list, a grey list and a black list.
- the TEI serial numbers of all the subscriber stations that the operator wishes to prevent from being used in the network may appear on the black list.
- the TEI serial numbers of all the subscriber stations the use of which the operator wishes to monitor particularly closely may appear on the grey list.
- the equipment register If the equipment register detects in block D that the received TEI serial number appears on one of the lists, it transmits in block E a response message which indicates the list on which the TEI serial number was found.
- said response message may contain information which indicates, for instance, that said TEI serial was found on the black list.
- the equipment register detects in block D that the re- ceived TEI serial number does not appear on any list, it transmits a response message which indicates that the TEI serial number is unknown.
- the response message is modified compatible with the mobile exchange of the TETRA system.
- the response message need not be transmitted via a MAP interface of the GSM-EIR equipment register to the mobile exchange of the TETRA system.
- means can be arranged in the equipment register, by which means the GSM-EIR equipment register is able to transmit response message data to the mobile exchange of the TETRA system by means of the signalling protocol used by said system.
- the GSM- EIR equipment register may comprise communication means for using two different signalling protocols. In practice, one or more computer programs may constitute said communication means.
- FIG. 2 is a block diagram of a first preferred embodiment of the TETRA system according to the invention.
- Figure 2 shows a TETRA system part which comprises a mobile exchange DXT, two base stations TBS1 and TBS2, a home location register HLR and an equipment register EIR. Unlike in Figure 2, the equipment register EIR can be connected to the home location register HLR.
- the subscriber stations 1 and 2 of the TETRA system can establish a connection to one another either on a direct-mode channel (having a direct radio connection to one another), >or alternatively, via the base stations TBS1 and TBS2 and the mobile exchange DXT.
- the TEI serial number of the subscriber station is conveyed to the mobile exchange DXT in conjunction with other sig- nailing.
- the mobile exchange DXT transmits an enquiry message containing the TEI serial number to the equipment register EIR.
- the equipment register in Figure 2 is a GSM-EIR register that is modified according to the invention in order to enable it to cooperate with the mobile exchange of the TETRA system.
- IMEI International Mobile station Equipment Identity
- the IMEI identifier comprises a 6-digit TAC (Type Approval Code), a 2-digit FAC (Final Assembly Code), a 6-digit SRN (Serial Number) and a 1 -digit SP (Spare).
- the TEI serial number used in the TETRA system is almost identical with the IMEI identifier, i.e. it comprises a 6-digit TAC (Type Approval Code), a 2-digit FAC (Final Assembly Code), a 6-digit ESN (Electronic Serial Number) and a 1 -digit SPR (Spare).
- the TEI serial number used in the TETRA system can be stored in the GSM-EIR reg- ister according to the invention.
- the GSM and the TETRA systems may use mutually different signalling protocols.
- the interface between the equipment register EIR and the GSM mobile exchange is MAP
- the TETRA system instead, can use another interface which hereinafter, by way of example, will be called a PUP (Professional mobile radio User Part) interface.
- the equipment register EIR in Figure 2 is provided with communication means 3 and 4 in order to enable the equipment register EIR to communicate both with the GSM mobile exchange and the TETRA mobile exchange (in practice, the EIR equipment register is arranged either in the GSM system or in the TETRA system, whereby either the communication means 3 or 4 are out of use).
- the communication means 3 and 4 can be implemented as a computer program.
- the equipment register also provides an interface to a CEIR (Central Equipment Identity Register) equipment register.
- CEIR Central Equipment Identity Register
- the CEIR is a com- mon, centralized equipment register of different networks where data of a plurality of operators can be collected.
- the equipment registers can be implemented such that each operator has in its network a dedicated EIR equipment register where the operator maintains data on the subscriber stations.
- the mobile exchange (or mobile exchanges, if more than one) of the operator performs subscriber station enquiries from the EIR equipment register of the operator.
- the EIR equipment register of each operator communicates with the centralized CEIR equipment register, to which the subscriber station data of all operators are conveyed from the EIR equipment register, and correspondingly, the CEIR equipment register conveys all sub- scriber station data entered therein to the EIR equipment registers of different operators so as to keep the subscriber station data of these registers updated.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI992346 | 1999-10-29 | ||
FI992346A FI19992346A (en) | 1999-10-29 | 1999-10-29 | TETRA system |
PCT/FI2000/000923 WO2001031949A1 (en) | 1999-10-29 | 2000-10-25 | A method for the management of subscriber stations in a tetra system |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1142383A1 true EP1142383A1 (en) | 2001-10-10 |
Family
ID=8555530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00969622A Withdrawn EP1142383A1 (en) | 1999-10-29 | 2000-10-25 | A method for the management of subscriber stations in a tetra system |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1142383A1 (en) |
AU (1) | AU7929300A (en) |
FI (1) | FI19992346A (en) |
WO (1) | WO2001031949A1 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI101031B (en) * | 1995-05-12 | 1998-03-31 | Nokia Telecommunications Oy | Checking the access rights of a subscriber device |
FI106508B (en) * | 1998-11-02 | 2001-02-15 | Nokia Networks Oy | A method and system for tracing a local loop |
-
1999
- 1999-10-29 FI FI992346A patent/FI19992346A/en unknown
-
2000
- 2000-10-25 AU AU79293/00A patent/AU7929300A/en not_active Abandoned
- 2000-10-25 WO PCT/FI2000/000923 patent/WO2001031949A1/en not_active Application Discontinuation
- 2000-10-25 EP EP00969622A patent/EP1142383A1/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO0131949A1 * |
Also Published As
Publication number | Publication date |
---|---|
FI19992346A (en) | 2001-04-30 |
WO2001031949A1 (en) | 2001-05-03 |
AU7929300A (en) | 2001-05-08 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
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