DE19844099A1 - In-house subsystem in a cellular network - Google Patents

Abstract

The invention relates to an in-house subsystem in a mobile radio telephone network (1) comprising a stationary home base station (3), at least one intermediate station (6; 7; 8; 9) and at least one mobile station (17; 18; 19; 20). The invention also relates to a method for communicating in this subsystem, whereby all elements (3; 6; 7; 8; 9) of the subsystem comprise means. Said means independently organize the distribution of system resources between the home base station, the at least one intermediate station (6; 7; 8; 9) and the at least one mobile station (17; 18; 19; 20).

Description

The invention relates to an in-house subsystem in one Mobile network consisting of a fixed home base tion, at least one intermediate station (repeater) and min at least one mobile station. The invention further relates to a method for communication in a subsystem of a mo bilfunknetzes and / or a wired communication network.

A similar subsystem and a similar procedure are out the international patent application WO 94/19877 known. In this application becomes a subsystem in a cellular network shown which is a fixed base station, an intermediate Station and several mobile stations, the local fixed base station with an external telecommunications network communicates with and via a transmit / receive antenna a mobile station is connected. Accordingly, it is also out this document a method for communication in a sub system of a cellular network or a wired com Communication network known, in which of several elements the existing subsystem to connect the base station a mobile network and possibly a landline maintains and this connection to the at least one Mo bilstation forwards.

The problem with this known subsystem is that a single base station is incapable of a larger one Buildings with several floors or an egg if necessary complex with several individual buildings and open spaces cover so that a good connection from all points between the mobile station and base station can.  

It will continue to refer to the post-published patent application DE 198 20 760 A1 of the applicant pointed out the problem of sufficient coverage. In this writing, a Broadband communication system with multiple cordless communication nikationsgeräte shown, which via intermediate stations with are connected to the telephone network, the intermediate stations hang on the power supply network and over it with each other communicate.

A disadvantage of such a system is that each intermediate station to a common power supply network must be connected to be able to communicate with each other nen. Especially with larger building complexes here if problems occur because the connection paths exist over de Power lines can be very long. This becomes additionally considerably more difficult if the power connection of the individual buildings only via public transformer stations electricity supply companies. Are the electricity circles of different buildings or one building not on the same, usually from three possible phases closed, there are additional problems with communication cation transfer.

It is therefore an object of the invention to have an in-house subsy stem in a cellular network and / or a wired Communication network and a method for communication in egg nem subsystem of a mobile radio network and / or wirge bound communication network to describe that also in larger buildings and complexes including the a satisfactory send / receive-Ab coverage of the mobile stations.

This task is accomplished by both the features of the claim 1, as well as by the features of the first method claim ches solved.  

Accordingly, the inventors incorporate an in-house subsystem a cellular network and / or a wired communication tion network, which consists of a stationary home base station tion, at least one intermediate station (repeater) and min at least one mobile station, the fixed home Base station at least one connection to an external NEN telecommunications network and at least one send / emp Loop antenna for internal connection to the at least one Has intermediate station, the at least one intermediate station via at least one connecting element for connection the one with the home base station or another intermediate station and at least one transmitting / receiving antenna for connection either with the at least one mobile station or egg ner another intermediate station and the at least one Mobile station a transmit / receive antenna for communication with the cellular network or an intermediate station, all Have elements of the subsystem means that the Auftei system resources between the home base station, the at least one intermediate station and the at least one month Organize bilstation independently. The function of self organization is explained below.

It should be noted that the term "in-house" in connection with the subsystem in the sense of the term "residential" commonly used in professional circles is used and to differentiate from the "public" - Systems is needed.

According to a special embodiment of the invention Subsystems is proposed that the means for self-organization nization from at least one algorithm for independent Distribution of system resources between the home base tion, the at least one intermediate station and the min at least one mobile station existing intermediate connections be stand, with each element of the subsystem representing the system resource cen independently assigned according to the same algorithm.  

Another advantageous embodiment provides that the or the connection means of the home base station a sen de / receiver unit for wireless communication with a Mo bilfunknetz and / or a wired connection to a fixed telecommunications network are / is.

According to a further advantageous embodiment of the The subsystem runs on at least one connecting line Communication from the home base station to a mobile station over at least one intermediate station or over several with intermediate stations communicating with each other.

As system resources to be shared among each other, playfully different frequencies and / or differ che time slots and / or different CDMA codes (CDMA = Code Division Multiple Access).

Furthermore, it is necessary within the scope of the invention that each Mobile station, each repeater and the home base station via one PIN each (PIN = personal identification number) and the intermediate stations and / or the home base station via a means of distinguishing access calculations and from non-authorized mobile stations adds. The means of differentiating from can be advantageous Mobilsta authorized to enter and not authorized to enter tion also have a data memory that stores the PIN of authorized mobile stations.

Regarding the connection of the subsystem to the cellular network and to the mobile station (s) can be advantageous for the Mo bilfunknetz the FDD method (FDD = Frequency Division Duplex) and within the subsystem the TDD method (TDD = Time Di vision duplex) can be used.

Another advantageous embodiment of the invention Subsystems is that the at least one intermediate station via means for performing a handover and / or  Takeover of the mobile station (handover) to / from the home base station and / or to / from another intermediate station adds. As a result, a mobile station within the Ab cover area of the subsystem move freely while the Connection of the mobile station depending on the location via under different connecting routes and intermediate stations run, or between different intermediate stations and connection paths are switched.

Another, more extensive configuration of the subsystem be is that the at least one intermediate station Means for executing a connection handover and connection Transfer of the mobile station (handover) between the Mon bilfunknetz and the intermediate stations. Hereby will a further improved mobility of the mobile stations is enough, since now a smooth transition between one internal connection in the subsystem to the external connection in the mobile network is possible without the user of this process is disturbed in its communication.

The subsystem described above can be used as an example for the GSM Network (GSM = Global System for Mobile Communications) and / or the UMTS network (UMTS = Universal Mobile Telecommunication Sy stem). Likewise, the subsystem can the landline connection to the ISDN network (ISDN = Integrated Ser vices Digital Network), the PSTN network (PSTN = Public Switched Telephone Network), the power supply network and / or the xDSL / ADSL network (xDSL = general generic term for Digital Subscriber Line, ADSL = Asymmetric Digital Sub scriber line).

According to the invention, the above object is also achieved by a method for communication in a subsystem of a mo bilfunknetzes and / or a wired communication network solved, whereby in the subsystem, which consists of several Ele elements that have a home base station, at least one Intermediate station and at least one mobile station included,  the home base station connects to a cellular network and if necessary maintains a landline and this Connection using the at least one intermediate station which forwards at least one mobile station and the min At least one intermediate station automatically allocates resources lung takes over. This independent allocation of resources represents a self-organization of the system, its function will be explained later.

At least the division becomes a possible resource allocation the used frequencies and / or the used time slot and / or the CDMA code (CDMA = Code Division Mul tiple access).

Advantageously, the method begins only that element (mobile station or base station tion), which initiates the logical connection establishment with the independent allocation of resources (building / dismantling the Data channels) between themselves and the next verb element of the logical connection chain. If one or several intermediate stations in the logical connecting line the intermediate station takes the channel structure to the next element including independent resources occupancy before.

According to a further embodiment of the method is pre suggest that an intermediate station has multiple mobile stations operated at the same time. This can happen, for example, in the same as the intermediate station (s) on several frequencies work in time, or one or more for each mobile station Time slots allocated in consecutive time frames become.

An advantageous option, the existing system resource cen may be that the intermediate station on a certain, predefined resource (frequency, Code, time slot), e.g. B. on a BCCH (Broadcast Control  Channel), or in a certain free time slot Sends a list of the resources already used. To this Wise is a potentially connection-initiating Mobilsta tion known which resources are not currently being used allowed to.

The method described above can advantageously, for example init for a landline and / or cellular network ized connection establishment (incoming call) and / or for one connection initiated by the subsystem (outgoing call) be performed.

According to the invention, the possibility is also just as advantageous speed of application of the method described in more detail above within the subsystem for "hand over" procedures between the various intermediate stations and / or between one Intermediate station and the base station.

The above-mentioned concept of self-organization regarding the resource allocation denotes a search algorithm, the base station, intermediate station and / or mobile station is executed and the the free system res sources - mostly from frequency, code, time slot indices exist - based on a quality criterion (e.g. RSSI = Ra dio Signal Strength Indication = reception field strength measurement, Checking the CRC bits) evaluates to what extent the resource cen are disturbed or occupied, and due to a periodic refreshed look-up table (about frequency, code, time slot index) decides which resource for the data transmission is used.

An exemplary algorithm can look like this:

• 1. Periodic measurement of the reception quality (using RSSI or CRC = Cyclic Redundancy Check) and storage in an electronic table (look-up table).
• 2. Search for the "best" free transfer resource in the look-up table.  
• 3. Decision to allocate a certain resource.

If a data packet is now received incorrectly, then by a corresponding ARQ procedure (ARC = Automatic Repeat Request) the data packet is retransmitted.

Another improvement and optimization, especially at high traffic comes into play, can best in it hen that the intermediate station over the BCCH the mobile stations announces which resources are already occupied or which ones Resources may not be used. This will cause disruptions avoided (e.g. trying two mobile stations at the same time access the same resource).

Further configurations, additional features and advantages the invention result from the following description preferred embodiments with reference to the Drawings and from the dependent claims.

It is understood that the above and next features to be explained not only in the specified combination, but also in others Combinations or alone can be used without to leave the scope of the invention.

The invention will now be described in more detail with reference to the drawing are explained.

Fig. 1 Inventive subsystem for a Gebäudekom plex,

Fig. 2 Another variant of a subsystem with a different repeater distribution.

Fig. 1 shows schematically an inventive subsystem with its elements in a building complex with four building parts len AD. In the building part A there is a home base station 3 which is connected to a mobile radio network 1 via an external transmit / receive antenna 4 . The mobile radio network can be, for example, a GSM, UMTS network or another mobile radio network. Furthermore, the base station is via a wire line 22 on a landline, e.g. B. the ISDN, PSTN network or another hard-wired communication network 2 connected. For internal communication, the home base station 3 has a transmit / receive antenna 5 with which it can connect to the other mobile stations 17 and intermediate stations 7 and 8 located in the building A.

The intermediate station 8 has a transmitting / receiving antenna 12 and 13 located in the building part A and in the building part B. In the building part B there is also a transmitting / receiving antenna 14 of the intermediate station 9 from the building part D. The intermediate station 9 also has a transmitting / receiving antenna 15 for the building part D.

The intermediate station 6 from the building part A has a fixed connecting line 16 which connects it to the intermediate station 7 from the building part C. The intermediate station 7 also has a transmitting / receiving antenna 11 for covering the building part C. The connection 22 between the intermediate station 6 and the intermediate station 7 can also be an optical communication connection by LASER or infrared or else a microwave connection. Likewise, the connection can be made via a wireless or wired in-house bus system (e.g. EIB = European Installation Bus, EHS = European Home Systems, Batibus from BatiBUS Club International), or via directional radio, wireless LAN (Local Area Network), Twisted pair, four-wire connection, coax cable, fiber optic cable, etc.

Furthermore, one or more mobile station (s) can be located in each of the building parts, which are represented symbolically and provided with the reference number 17-20 . The radio connections of the individual elements of the subsystem are symbolized by the arrows 23-29 .

All stationary elements of the subsystem, namely the intermediate stations 6-9 including the home base station 3 "know" of each other by being identified by a personal identification number (PIN). Likewise, the stationary elements recognize on the basis of the respective PIN, which is unique to each mobile station, whether the mobile station is authorized to access the communication system of the subsystem. If an authorized mobile station leaves the coverage area of an intermediate station and moves to the coverage area of another intermediate station, a handover procedure is initiated from the first to the second intermediate station. For example, the mobile station 19 can move from the building part B into the building part D, ie leave the coverage area from the intermediate station 8 and penetrate into the coverage area of the intermediate station 9 . When transferring from building part B to building part D, the handover procedure is then initiated and the connection between mobile radio network 1 or landline network 2 to mobile station 19 is first via home base station 3 to intermediate station 8 and then via home base station 3 via intermediate station 8 and intermediate station 9 handled. With this handover process, as with a new connection, the distribution of system resources is regulated decentrally and independently. The implementation of such a self-organization is described above.

A corresponding process takes place, for example, when the mobile station 17 moves from the building part A to the building part C. Here the home base station 3 recognizes that the mobile station 17 leaves its coverage area, while the intermediate station 7 recognizes that the mobile station now enters its coverage area and initiates a handover procedure from the home base station 3 to the intermediate station 6 and intermediate station 7 .

If, for example, the mobile station 18 moves from the building part C into the building part D, the intermediate station 7 detects the leaving of its area and the intermediate station 9 registers the entry of the mobile station 18 into its coverage area. With the handover procedure, the connec tion of the mobile station 18 , which first ran via the intermediate stations 7 and 6 to the home base station 3 , is passed to the intermediate station 9 , which routes its connection to the home base station 3 via the intermediate station 8 .

In this way, free mobility of the Mobilstatio NEN within the building complex with its building parts AB is possible, with an optimal connection to the cellular network 1 and / or landline 2 being given from each location. The mobile stations can also be moved without interruption during an existing connection.

In the case of a larger building, the individual can Storey intermediate stations are set up. With size complexes with several buildings and open spaces For example, one or more intermediate sta installed and an intermediate station for the Outdoor areas are used, with the home base station above one or more intermediate stations all intermediate stations can achieve and an independent division of the existing system resources.

A further variation of the subsystem according to the invention is shown in FIG. 2. The main difference from Fig. 1 is that the intermediate station 8 is not in the building part A, but is installed in the building part B. Furthermore, the building part D is free of intermediate stations.

Such a situation is conceivable if the spatial separation between the building parts A and B on the one hand and the building parts B and D on the other hand is structurally weak enough or spatially so close that the radio connection 23 between the home base station 3 or possibly another radio connection from one another intermediate station is sufficient to reach intermediate station 8 . Likewise, the presence of an intermediate station in a part of the building, as here in Part D, can be dispensed with if this part of the building is covered by an intermediate station located elsewhere.

So it comes with the division of the intermediate stations in the we substantial to ensure that sufficient radio coverage of the Premises is reached and from wherever possible a direct or indirect connection between the mobile Terminals and the home base station can be made. It is irrelevant how many stopovers for the Connection are necessary.

Claims (28)

1. In-house subsystem in a mobile radio network ( 1 ) and / or a wired communication network ( 2 ) consisting of a stationary home base station ( 3 ), at least one intermediate station ( 6 ; 7 ; 8 ; 9 ) and at least one mobile station ( 17 ; 18 ; 19 ; 20 ), wherein the fixed home base station ( 3 ) at least one connection means ( 4 ; 22 ) to an external telecommunications network ( 1 ; 2 ) and at least one transmit / receive antenna ( 5 ) for internal connection with the at least has an intermediate station ( 6 ; 7 ; 8 ; 9 ), the at least one intermediate station ( 6 ; 7 ; 8 ; 9 ) via at least one connecting element ( 10 ; 11 ; 12 ; 13 ; 14 ; 15 ; 16 ) for connection either with the home base station ( 3 ) or a further intermediate station ( 6 ; 7 ; 8 ; 9 ) and at least one transmitting / receiving antenna ( 10 ; 11 ; 12 ; 13 ; 14 ; 15 ) for connection to either the at least one mobile station ( 17th ; 18 ; 19 ; 20 ) or another intermediate station ( 6 ; 7 ; 8 ; 9 ) and the at least one mobile station ( 17 ; 18 ; 19 ; 20 ) has a transmitting / receiving antenna for com munication with the mobile radio network ( 1 ) and / or an intermediate station ( 6 ; 7 ; 8 ; 9 ), characterized that all elements ( 3 ; 6 ; 7 ; 8 ; 9 ) of the subsystem have means which divide the system resources between the home base station, the at least one intermediate station ( 6 ; 7 ; 8 ; 9 ) and the at least one mobile station ( 17 ; 18 ; 19 ; 20 ) organize independently. 2. Subsystem according to claim 1, characterized in that the means for self-organization at least from an algorithm for the independent distribution of system resources between the home base stations ( 3 ), the at least one intermediate stations ( 6 ; 7 ; 8 ; 9 ) and there are at least one mobile station ( 17 ; 18 ; 19 ; 20 ) existing intermediate connections, each element of the subsystem ( 3 ; 6 ; 7 ; 8 ; 9 ) independently occupying the system resources according to the same algorithm. 3. Subsystem according to one of the preceding claims, characterized in that the or the connection means of the home base station has a transmitting / receiving unit for wireless communication with a mobile radio network ( 1 ) and / or a wired connection ( 22 ) to a fixed telecommunications network ( 2 ) are / is. 4. Subsystem according to one of the preceding claims, characterized in that the at least one Ver connecting element of the intermediate station ( 6 ; 7 ; 8 ; 9 ) is a transmitting / receiving antenna ( 4 ) and / or a cable connection ( 16 ). 5. Subsystem according to one of the preceding claims, characterized in that with at least one Ver connection line, the communication from the home base station to a mobile station via at least one intermediate station ( 6 ; 7 ; 8 ; 9 ) or via a plurality of intermediate stations communicating with one another ( 6 ; 7 ; 8 ; 9 ) runs. 6. Subsystem according to one of the preceding claims, since characterized in that the one above the other shared system resources at least different frequencies zen included. 7. Subsystem according to one of the preceding claims, since characterized in that the one above the other shared system resources at least different times slots included. 8. Subsystem according to one of the preceding claims, since characterized in that the one above the other shared system resources at least different CDMA Codes (CDMA = Code Division Multiple Access) included. 9. Subsystem according to one of the preceding claims, characterized in that each mobile station ( 17 ; 18 ; 19 ; 20 ), each intermediate station ( 6 ; 7 ; 8 ; 9 ) and the home base station. ( 3 ) each have a PIN (PIN = personal identification number) and the intermediate stations ( 6 ; 7 ; 8 ; 9 ) and / or the home base station ( 3 ) has a means of differentiating between access-authorized and non-access-authorized mobile stations. 10. Subsystem according to claim 9, characterized records that the means of distinguishing access authorized and non-authorized mobile stations has a data memory that stores the PIN entitled mobile stations contains. 11. Subsystem according to one of the preceding claims, characterized in that the connection of the subsystem to the mobile radio network ( 1 ) according to the FDD method (FDD = Frequency Division Duplex) and the connection in the subsystem according to the TDD method (TDD = Time division duplex) expires. 12. Subsystem according to one of the preceding claims, characterized in that in the case of an intermediate station ( 6 ; 7 ; 8 ; 9 ), this via means for performing a handover and / or takeover of the mobile station ( 17 ; 18 ; 19 ; 20th ) to / from the home base station ( 3 ). 13. Subsystem according to one of the preceding claims, characterized in that in the case of at least two intermediate stations ( 6 ; 7 ; 8 ; 9 ) these via means for carrying out a handover of the mobile station ( 17 ; 18 ; 19 ; 20 ) un ter the intermediate stations ( 6 ; 7 ; 8 ; 9 ). 14. Subsystem according to one of the preceding claims, characterized in that the at least one intermediate station ( 6 ; 7 ; 8 ; 9 ) via means for carrying out a connection transfer and connection acceptance of the mobile station ( 17 ; 18 ; 19 ; 20 ) between the Cellular network ( 1 ) and the intermediate stations ( 6 ; 7 ; 8 ; 9 ). 15. Subsystem according to one of the preceding claims, since characterized in that the subsystem the GSM network (GSM = Global System for Mobile Communications) assigned is. 16. Subsystem according to one of the preceding claims, since characterized in that the subsystem the UMTS Network (UMTS = Universal Mobile Telecommunication System) added is arranged. 17. Subsystem according to one of the preceding claims, since characterized in that the subsystem with respect to the landline connection to the ISDN network (ISDN = Integrated Ser vices Digital Network). 18. Subsystem according to one of the preceding claims, since characterized in that the subsystem with respect to of the landline connection to the PSTN network (PSTN = Public Switched Telephone Network) is assigned. 19. Subsystem according to one of the preceding claims, since characterized in that the subsystem with respect to of the landline connection to the power supply network / Powerline Network is assigned. 20. Subsystem according to one of the preceding claims, since characterized in that the subsystem with respect to of the landline connection to the xDSL / ADSL network (xDSL = general ner generic term for Digital Subscriber Line, ADSL = Asymme tric Digital Subscriber Line) is assigned. 21. A method for communication in a subsystem of a mobile radio network ( 1 ) and / or a wired communication network, the subsystem consisting of several elements comprising a home base station and at least one intermediate station ( 6 ; 7 ; 8 ; 9 ) and contain at least one mobile station ( 17 ; 18 ; 19 ; 20 ), the home base station ( 3 ) maintaining a connection to a mobile radio network ( 1 ) and possibly a landline network ( 2 ) and this connection with the aid of at least one an intermediate station ( 6 ; 7 ; 8 ; 9 ) to the at least one mobile station ( 17 ; 18 ; 19 ; 20 ) forwards, characterized in that the at least one intermediate station ( 6 ; 7 ; 8 ; 9 ) automatically allocates resources takes over. 22. The method according to claim 21, characterized indicates that the allocation be for resource allocation used frequencies and / or time slot used and / or CDMA code (CDMA = Code Division Multiple Access) counts. 23. The method according to one of the preceding claims, characterized in that only that element (mobile station or base station) which initiates the logical connection establishment with the independent allocation of resources (establishment / dismantling of the data channels) between itself and the next connection element the logical connecting chain begins and if one or more intermediate stations ( 6 ; 7 ; 8 ; 9 ) lie in the logical connecting line, the respective intermediate station ( 6 ; 7 ; 8 ; 9 ) carries out the channel construction to the next element including independent resource allocation. 24. The method according to one of the preceding claims, characterized in that an intermediate station ( 6 ; 7 ; 8 ; 9 ) serves several mobile stations ( 17 ; 18 ; 19 ; 20 ) simultaneously. 25. The method according to one of the preceding procedural claims, characterized in that the intermediate stations ( 6 ; 7 ; 8 ; 9 ) on a BCCH (Broadcast Control Channel) a list of the resources already occupied, which are not occupied by the connection-initiating mobile station may send out. 26. The method according to one of the preceding claims, characterized in that it is carried out for an initiation from the fixed network and / or mobile radio network ( 1 ) connection setup (incoming call). 27. Method according to one of the preceding method claims che, characterized in that it is for one of the Subsystem initiated connection establishment is carried out (outgoing call). 28. The method according to one of the preceding method claims, characterized in that it is within the subsystem in connection handover procedures between different intermediate stations ( 6 ; 7 ; 8 ; 9 ) and / or between an intermediate station ( 6 ; 7 ; 8 ; 9 ) and the base station ( 3 ) is performed.