MXPA96006303A - A radio unit and a method for connecting a subscription fixed subscription to a local circuit system inalambr - Google Patents

Abstract

The invention relates to the connection of a subscriber station 1 of a fixed network, such as a telephone device, to a WLL system. The radio unit (10, MS) to which a subscriber station WLL 1 is connected initiates the connection and production of calls in the radio network immediately when the first digit is received from the subscriber station. In that way, the directory number of the called party is dialed simultaneously with the establishment of a signaling connection between the radio unit and the MSC in the radio network. The radio unit receives the digits of the directory number dialed until the end of the dialing. When the marking is complete, the radio unit sends the directory number of the called party to the radio network (address command). As a result, the delay typically associated with the production of calls from a cellular radio network is minimized in the W applications.

Description

A RADIO UNIT AND A METHOD TO CONNECT A STATION SUBSCRIPTQRA FI3A fl A SYSTEM LOCAL CIRCUIT INAL MBRICO FIELD PE INVENTION The invention relates to the connection of a subscriber station of a fixed network, such as a telephone apparatus, to a radio network.

ANTECEPENTES PE THE INVENTION The most difficult and expensive part in the establishment of conventional fixed telecommunications networks is wiring, which interconnects each subscriber with a local exchange. In many cases, it is therefore advantageous to replace the fixed subscriber cables with a radio connection, which can be established easily and quickly to provide subscribers with access to a public switched telephone network (PSTN). In this case, the subscriber's network includes, as a normal radiotelephone network, "base stations connected to a central station and communicating to a fixed radio unit through the radio channel." The radio unit, in turn, provides a line conventional subscriber, to which it is possible to connect any subscriber station of a fixed telecommunication system, such as a telephone apparatus, In this way, the radio path is transparent to the user and provides, point-to-point annexation between the telephone and central unit, such a system is often referred to as a Wireless Local Circuit (ULL), since an ULL radio system is usually an extension of the normal PSTN network, the numbering Normal of a telephone network is typically employed in it. Therefore, the production of calls carried out from the subscriber's terminal should be as similar to the production of calls in a fixed network as possible so that the radio connection is as "transparent" as possible. For the reduction of costs and planning work it is advantageous to implement ULL networks using existing radio network architectures such as the PanEuropea GSM (Mobile Global System) mobile network or the NMT Mobile Nordic Telephone network. An ULL network can still be included as part of a normal mobile network, with which ULL subscribers can be subscribed as mobile subscribers in the same network. The production of calls carried out by a mobile subscriber, however, does not correspond to the production of calls carried out in a fixed network as such. It is possible to determine in the mobile service switching centers, case by case, how to distribute different calls. Typically, it is defined in the mobile service switching centers that the local number (numbers beginning with digits 2 to? In Finland) refers to the internal telephone number of the mobile network. If a mobile subscriber wants a call to be distributed from the mobile network to the PSTN, he must dial a national area code (a number that starts with 9 in Finland) before the PSTN number of the receiving party. When an international call occurs, the. international prefix (for example in Finland 990 or 999), specific for each country is marked first, and then the country code, the national area code and the number of the receiving party are marked, according to the ISDN numbering. When • = make a call from a landline phone, no area code is dialed before the local phone number. In other words, the user must dial different area codes in a mobile network and in a fixed network. This causes problems particularly in a mobile network in which both normal mobile subscribers and ULL subscribers are located within the area of the same base station. In such a case, the mobile network must be able to distinguish these local numbers from the subscribers that require different distribution, that is, distribution within the mobile network or distribution according to the PSTN numbering. The purpose is that when a ULL subscriber dials a local call, it will be distributed to the PSTN. If, again, the ULL subscriber wants to make a call to a mobile subscriber within the same mobile network, he must dial the area code of the mobile network before the subscriber number, as is usual when a call is made from the PSTN network, since it is expected that a ULL terminal equipment behaves in the same way.,? That is a PSTN terminal equipment. Second, the user of a mobile network must press a specific 'send' key after dialing the directory number to activate the production of the call, and a key to 'finish' when the call ends. send 'or' end 'on the fixed line telephone devices In the fixed network, picking up the telephone handset (off-hook) activates a subscriber circuit, which is' -enjoyed in the exchange. generates a dial tone to the subscriber's circuit When the subscriber begins to dial the called party number, the central unit stops generating the dial tone If the production of the call fails or the called party is busy, the central generates a busy tone to the subscriber's circuit In the same way, the control panel also generates other signal tones to the subscriber's circuit, so there is a need to implement the interface between a fixed telephone and a radio unit. so that the production of the call can be carried out according to the production of the call in the fixed network as much as possible, that is, using the numbering scheme of the fixed network, avoiding the use of shipping keys and completion, and supporting the analog signal tone of the fixed network indicating the procedure of the production of the call to the user. European Patent Application No. 0 569 314 describes a device for coupling one or more conventional telephone devices to a cellular radio network. The equipment comprises a radio unit for a conventional telephone equipment. To make an external call the user picks up the handset and the adapter generates the dial tone upon detecting that the subscriber circuit is closed. When he hears the dial tone, the user dials the directory number of the called party. The "•" tone is turned off when the first digit is dialed in. The equipment concludes that the dialing is over when a predetermined time has elapsed without any additional digits having been dialed. radio network The call is terminated when the user hangs up the handset, so that the telephone set of a fixed network can be used in a conventional manner, even though it is connected to a cellular radio network. 737 975, and 4 775 997 describe an interface that connects a conventional telephone device to a tranceptor of a cellular radio network.When the headset of the fixed network hangs up, the interface system detects closure of the subscriber circuit and generates a tone The system converts the numbers or digits marked by tone-dialing or pulse-dialing into digital data for storage in the tranceptor. marked, the system automatically determines when the last digit occurs and generates a send signal to the tranceptor. After receiving the send signal, the tranceptor transmits the telephone number that has been converted into a sequence of bits to the local exchange, which decodes the number and routes of the call to the called party. In this system, the telephone apparatus of a fixed network can also be used in the conventional manner. U.S. Patent No. 5,117,450, describes a cellular radiotelephone that is connected to a "•" normal telephone set of a fixed network. The cellular phone comprises a detector that follows the closing / opening of the subscriber circuit, and once the subscriber circuit is closed, generates a dial tone. A DTNF detector detects the numbers / digits marked with a push-button telephone apparatus, and encodes and stores them in the memory. If 5 seconds have passed since the last digit was detected, the cell phone will check if the dialed number can be accepted, that is, if the dialed number contains enough digits or if it is a special directory number, such as an emergency number. If the dialed number is in an acceptable form, the stored directory number is transmitted to the cellular network and a call production is initiated. In all prior art solutions described above, the signaling connection on the radio path is not established until the entire directory number of the called party is dialed and a pre-selected time has elapsed since the completion of dialing. Then, some time is required to establish the signaling connection before the called party's directory number can send the radio path back to the exchange. This is the reason for the typical delay in the production of the call in a cellular radio network, and the delay is further increased by the delay (up to 5 seconds) used to detect the completion of the dialing. This delay does not occur in the call production of a network, therefore, the delay caused by the production of the call must be minimized in the ULL system so that the ULL system is as similar to the fixed network as it is Also possible in this respect, the prior art solutions described above do not take into account the incompatibility of the numerical programs, such as area codes either between the fixed network or cellular radio networks. 0 530 010 discloses a radiotelephone used in a multinational mobile telephone network, comprising an abbreviated dialing memory.The directory numbers may be sent to the abbreviated dialing memory either in the U + M + T or K + T format, where U = international prefix, M = country code, K = national identifier, and T = trunk prefix, plus subscriber number A country indicator C is added to each number dialed, although a National number must be related. When a call is established by means of an old number, the telephone radio first checks in which country the network is currently registered. If a number retrieved from the memory and corresponding to an abbreviated number contains the country code of the current country location, it is recognized as a domestic call, and the number will be retrieved in the K + T format. If instead the country code of the directory number retrieved from the memory is different from the location of the current country, the directory number will be ^ in the U + M + T format, where U refers to the international prefix of the country in which the telephone is registered to the network. Whether international numbers or home numbers include their area codes, they can be stored only in abbreviated dialing memory. The solution does not support the dialing of a local number in the production of calls carried out through an ULL system, in which it is usually possible to dial international and long distance calls only. U.S. Patent No. 4 473 720 discloses an automatic marker comprising a fixed part and a removable part. The fixed part contains location identifications, that is, the international prefix, the national identifier, the country code and the trunk prefix used in the question location. The memory of the removable part contains the same parameters as well as the directory numbers from which the dialer can establish a call. As for its format, the directory numbers are numbers of local directories, domestic long distance numbers, or international long distance numbers. When the removable part is connected to the fixed part, the marker makes a comparison between the location identification parameters. If there are differences between the parameters, the marker will modify the directory numbers in the memory of the removable part from the local numbers in the long distance numbers according to the parameters, and vice versa. The dialer is intended for a fixed network, and is not suitable for an ULL system, in which a call is established by a radio telephone network. It does not take into account in this way the problem related to supporting the dialing of a local directory number in the production of calls carried out through a radio network, with which it is usually possible to dial domestic and international long distance numbers "only.

DESCRIPTION PE THE INVENTION An object of the present invention is to reduce the problems described above by decreasing the time of the production of calls in an ULL system and eliminating the incompatibility between the numerical scheme in the fixed network and in the radio network. The invention relates to a radio unit for connecting to a subscriber station of a fixed network, such as a telephone apparatus, the radio network of a ULL system comprising means for detecting the hung and unhooked states of said subscriber station , means for generating signal tones to said subscriber station; a detector for detecting dialed digits received from said subscriber station, such as the digits related to the directory number of a called party; the radio unit is ready for > - eparar the detected digits of the directory number of the called party to send them to the radio network after the dialing has finished. The radio system is characterized in accordance with the invention because it is arranged to initiate connection and call production in the radio network in response to detection of the first digit or digits dialed. The invention further relates to a method for establishing a call from a fixed subscriber station, such as a telephone apparatus, which is connected to the radio unit of the radio system of an ULL system, comprising the following steps: a user of the fixed subscriber station dials the directory number of the called party, said directory number consists of several digits; the radio unit detects said dialed digits of the called party's directory number received from the fixed station βscriber; the radio unit separates said marked digits until the end of the dialing; the radio unit sends the directory number of the called party to the radio network after dialing is completed. According to the invention, the method is characterized by the initialization connection of the radio unit and the production of calls in the radio network immediately after detecting the first digit or digits dialed before the end of the marking. The invention further relates to a ULL system comprising a radio network and a radio unit by means of which the fixed subscriber station, such as a telephone apparatus, is connected to the radio network, the unit radio comprises means for detecting the hung and unhooked states of the fixed subscriber station; means for generating signal tones to the fixed subscriber station; a detector for detecting the dialed digits received from the fixed subscriber station * such as the digits related to the directory number of the called party; the radio unit arranged to separate the detected digits of the called party to send them to the radio network after the completion of the dialing. According to the invention, the system is characterized in that the radio unit is sensitive for the detection of the first digit dialed or digits to initiate the connection and the production of the call in the radio network by means of a call production command which does not contain the directory number of the called party; the radio network is ready to start production of the calls only after reviewing from the subscriber data that the call production commands of the subscribing station are accepted without the directory number of the called party; the radio unit is arranged to send the directory number of the called party to the radio network in an address message subsequent to the production of the call when the dialing is completed; the radio network is arranged to initiate the distribution of the call according to the directory number of the called party upon receiving said address message. In the invention, the radio unit to which a fixed subscriber station is connected initiates connection and call production in the radio network immediately when the first digit or character of the directory number of the called party is dialed from the subscriber station. In this way, the directory number of the called party can be dialed simultaneously when the call production procedures of the radio network establish a signal connection between the radio unit and the exchange. The radio unit separates the digits of the dialed directory number until the end of the dialing. When the dialing is finished, the radio unit sends the directory number of the called party to the radio network. It can be assumed that the dialing has ended when at a preset time elapsed for the detection of the last digit, or when a present digit has been detected that indicates the completion of the dialing When the completion of the dialing is -included on the basis of time. in which it has passed since the last digit, whose time can be several seconds, there is a risk of losing the benefit of the time gained from the simultaneous production of a simultaneous signaling connection and marking. The production time of the call can be kept at its minimum if the subscriber indicates the completion of the dialing itself by pressing a preset key such as '#'. If both forms described above are * used simultaneously for the retention of the end of dialing, it is possible to gain time benefit from the production of the quick call, but also to ensure the continuation of the production of the call in a situation in which the user forgets to mark the character that indicates the completion of the dialing. In a preferred embodiment of the invention, in addition to the production of the signaling connection, the production of the actual call is also initiated before the completion of the dialing by sending a production message from the radio unit to the radio network. Call that does not contain the directory number of the called party. With this solution, the time of production of the call can be reduced more than by means of the single simultaneous dialing and establishing the signaling connection. If only the signaling connection is dialed and established simultaneously, the call production message will not be sent until the entire directory number has been dialed, which results in another elastically large delay before the call is established. Again, if par + e of the procedures related to the production of the call are already carried out during the call and if the number of directories is then sent in a separate address message, the delay typically associated with the production of the call of a cellular radio network can be further minimized. The support of the local number of the network can be performed as follows in accordance with a preferred embodiment of the invention. The mobile services switching center automatically sends the local numbers contained in the address message to the PSTNs. In other words, the mobile services switching center concludes directly from the use of the address message that a ULL subscriber is interested and that the local numbers refer to the PSTN numbers. Due to this solution, a ULL subscriber can dial a directory number according to the numbering program employed in a fixed network, but the distribution procedure carried out by the exchange can be maintained unchanged, for example in the GSM system. In other words, the mobile subscribers employ a normal call production procedure and a normal call production message.

BRIEF DESCRIPTION OF THE DRAWINGS Accordingly, the invention will be described in more detail by means of the preferred embodiments with reference to the accompanying drawings in which Figure 1 shows a ULL radio system according to the invention. Figure 2 is a step diagram illustrating a ULL subscriber station of the invention, comprising a telephone set 14 of a fixed network, an adapter and a terminal equipment MS of a radio network. Figure 3 is a signaling diagram illustrating the signaling of the production of the normal call of the GSM system in a case of an external call. 4 is a signaling diagram illustrating the signaling of the call production according to the invention in a case of an external call. Figure 5 is a flow diagram illustrating the operation of the adapter 10 according to the invention in the production of an external call. Figure 6 is a flow diagram illustrating the operation of the MS in the production of calls from an external call according to the invention. Figure 7 shows the structure "called party number" of the information element of the start message.

Figure 8 shows the structure of the address message according to the invention. PREFERRED MODALITIES OF THE INVENTION The present invention can be applied in any radio system that is used to implement a wireless subscriber connection of a Wireless Local Circuit (ULL) system by replacing the wired subscriber lines between a fixed telecommunications network, such as a telephone network. and its subscribers. The attached figure 1 shows the principle of an ULL system according to the invention based on the use of radio networks of the prior art, such as GSM. The ULL system can be carried out as part of a conventional communications network, with which there can be both ULL subscribers and mobile subscribers in the same network. In the following, the invention will be read by way of example with reference to an ULL network based on the Pan European GSM digital mobile communication network, however without being restricted thereto. The radio system shown in Figure 1 comprises a mobile services switching center MSC, a base station controller BSC, bats stations BTS, and a subscriber station ULL 3,4. For purposes of clarity, Figure 1 shows only one base station controller, two base stations, and one sub-subscriber station, but naturally there are many of them in a real network. The MSC comprises, a conventional radio telephone exchange, a switch for switching calls, and a call control computer for controlling all signaling between subscriber stations and the radio network during the production of the call, conversation and termination of the call and locate the radio channels for calls for radio connections between the BTS and the subscipient stations 3,4. The MSC of the radio system is also connected to a PSTN 2 public switched telephone network, and also to PSTN 1 subscribers, as well as other networks 10 and their subscribers. The MSC can be implemented directly with a local exchange in the PSTN network. The BTS can also be implemented in the same way as a conventional base station. Its basic unit naturally consists of a plurality of tranceptors, whose exact number is determined according to the required traffic capacity. A subscriber station ULL typically comprises a radio unit 3, and a conventional subscriber station of a fixed network, such as a telephone apparatus 4, a fax machine, a data router or the like. The radio unit 3 operates as an interface unit towards the radio path and provides the user with a two-wire analogue receiver line to which the user can connect his conventional telephone set 4. The structure of the radio unit will be described in greater detail below in relation to Figure 2.

A ULL sub-processor station typically has a fixed location within the ULL system. Therefore, the MSC of the ULL system connects the directory number of the subscriber station to the location area formed by a BTS base station or a number of base stations within the coverage area in which the station is located. subscriber When there is a termination call to the subscriber number, the MSC begins to announce the subscriber station via the radio only in the area of the BTS in question or in the location area in question, since it is assumed that the subscriber is In a fixed position, neither the mobility management functions nor the location update are necessary in the ULL system although these functions are a part of a normal mobile communications network.The radio system, however, must understand less a subscriber database such as a VLR visitor location recorder connected to the MSC, to maintain the subscriber data in the subscribers located within the area of the MSC Figure 2 shows a radio unit 3 according to the invention which comprises a terminal equipment of radio systems MS and an adapter 10. The adapter 10 provides a PSTN two-line subscriber line interface. conventional analog cable 11 for connecting a PSTN subscriber station, such as a telephone apparatus 4. A DC voltage source 12 = renews the direct voltage (eg 12 V, 24 V, or 48 V) required for the subscriber circuit in the Subscriber line interface. A Hang / Off hook detector 13 detects the closure of the subscriber circuit when the user picks up the handset (off-hook), and opens the subscriber circuit when the user hangs up the handset (hanged). A signal tone generator 14 generates the signal tones required for the interface of the subscriber line 11, indicating the * different stages of the call to the user. These sign tones include, for example, dial tone, busy tone, ring tone, etc. A ring voltage generator 16 generates a ring voltage to the subscriber line interface 11 to provide a ring signal to the telephone apparatus 4 in the case of an incoming call. A detector * 15 detects the dialed digits of the dual tone multifrequency (DTMF) in the binary format to process later, what The detector 15 can also be a pulse dial detector if the telephone apparatus 4 employs pulse dialing. All steps 11-16 can be implemented in the ways known per se. and practical implementation examples are described for example in U.S. Patent Nos. 737 975 and 5 117 450. The adapter 10 further comprises a microcontroller 17, to which the outputs of the detectors 13 and 15 enter for further processing, and which controls the operation of the signal tone generator 14 and the ring voltage generator L6. The controller j.1 comprises a control interface 22, through which it transmits the dialed digits and control signals to the radio unit MS, and receives control signals from the radio unit MS. The radio unit M? provides a radio connection to BTS of the radio network, and all the signaling related to the radio connection with the radio system. The radio unit MS is advantageously a terminal equipment of the radio system where the implementation of the ULL system is based. In this case described in the example the radio unit MS is a terminal equipment of the GMS system, and has been modified for the operation according to the inversion, as will be described below. In the lid diagram shown in Figure 2, the radio unit Ms comprises only the basic and essential components for describing the invention. A transcriber stage 18 comprises a radio transmitter and receiver, modulation and detection, simultaneity and deslimitaity, channel modification and channel decoding, speech coding, speech decoding, etc. An audio / data port 24 of transcpptor 18 is connected to the line of the suscpptor line 11 of the adapter 10. The tranceptor 18 modulates an audio / data signal received on port 24 over the radio frequencies, and transmits the signal RF through an antenna 21 to the base station BTS. Accordingly, the tranceptor 18 modulates the radio frequency signal received from the BTS in a baseband signal of a? Dio / data, which * _ <; s applied through port 24 to subscriber line interface 11. The operation of radio unit MS is controlled by an icrocontroller 20. Controller 20 generates signaling messages, which are sent through tranceptor 18 to radio system, and decode messages d? signaling received from the radio system through the tranceptor 18. The controller 20 is connected to the controller 17 of the adapter 10 by means of a "control 22" interface, through which the dialing digits and the control signals are transmitted. In addition, a volatile memory for temporary storage of the dialing digits, as well as a meter 23 for detecting the end of the marking are connected to the controller 20, as will be explained later. Figure 3 is a signaling diagram illustrating signaling commands in a call production carried out at the end of the subscriber in accordance with the recommendations of GSM 04.08, version 4.7.0. As mentioned above, this signaling is not initiated in mobile communications systems until the number of the called party is dialed by pressing the "send" key. This causes a delay in the typical call production of the mobile communication networks. In solutions of the prior art, in which a fixed telephone is connected to a terminal of a mobile communication system, producing a signaling connection and a call is also initiated only after a preset time has elapsed from "i end of the marking. The combined effects of these factors have resulted in a noticeably long delay in call production. In the invention, the delay in the production of calls is shortened by initiating call production immediately after the first dialing digit has been detected. In addition, the start command is divided into two parts according to the invention to further shorten the delay in call production. The production of calls t according to the invention will be explained in the following description in more detail with reference to the drawings 4-8. Fig. 5 is a flow chart illustrating the operation of the adapter 10 shown in Fig. 2. The detector 13 on the adapter 10 monitors the closing (off-hook) and opening (hanging) of the scriptor line at the interface of subscriber line 11 (step 501). When the telephone speaker 4 is off-hook, the subscriber line is closed 'off-hook', and the controller 17 instructs the signal tone generator 15 to generate a dial tone to the subscriber's line interface 11 (step 502) . After this, the user of the telephone 4 is expected to dial the first dialing digit (number or symbol) in step 503. When the detector 15 detects the first DTMF digit and sends the corresponding binary value to the controller 17, the controller 17 will generate a "send" signal (step 504) to the controller 20 of the radio unit MS. Simultaneously, the first detected digit is transferred to the controller 20. Next, reception or the second dial digit is expected (step 505). Once the .1.7 controller has received the second dialing digit, it will transmit the digit to the controller 20 and reset the meter 23 (step 506) which measures the time that has elapsed since the reception of the second digit. In step 507, the controller 17 checks whether a new dialing digit has been received. If that is not the case, the controller 17 will check whether the reading on the meter 23 has reached the predetermined delay time TI (aso 508). If that is not the case either, one returns to step 507. In case the meter 23 has reached the predetermined delay time TI, that is, the TI time that has elapsed since the last digit marking, the controller 17 assumes that the marking is over, and generates an "end of dial" signal to the controller 20 of the radio unit. If the controller receives a new digit in step 507, will verify if the digit is a specific predetermined symbol marked by the user to indicate the end of the marking (step 509). The use of the "end of dial" symbol provides the maximum benefit of carrying out the establishment of the signaling and call connection, simultaneously with dialing (after step 504). In the case where only the time elapsed since the dialing of the previous digit is measured, a significant part of the benefit obtained from the simultaneous production of calls will be lost. Nevertheless, a preferred embodiment of the invention consists, in addition to the "end of dialing" symbol, of a meter 23 to ensure that 1 call production begins after TI time as a last option if the user forgets to dial the "end of dial" signal. . In the preferred embodiment of the invention, the "end of marking" symbol is represented by the "#" character. The "#" character is the most appropriate for that purpose, since it does not appear in directory numbers, only appears as the first or second digit, or co or the last digit in supplementary service commands. In the invention, the characterization of the "end of marking" symbol is only carried out for the third digit and the subsequent digits, where "#" in the first or second digit will not cause any problem. If a supplementary service command ends with the "#" symbol, there is no need to mark the symbol twice. If the digit verified in step 509 is not the character "#", the controller 17 will transmit the digit to the ** on-controller 20 and will return to the step 506. The controller 17 will continue on the line (506, 507, 508 and 509) receiving new digits until the meter 23 expires or the end character "#" is received. 6 is a flow diagram illustrating the operation of the radio unit MS according to the invention in the production of an outgoing call. In step 601 in Figure 6, the controller 20 of the radio unit awaits the "send" signal from the controller 17 of the adapter 10. When the controller 20 receives the "send" signal through the control line 22 , it will immediately initiate a procedure for establishing a signaling connection and a call (step 602). These procedures include signaling between the radio unit and the radio network in accordance with the recommendation GSM 04.08, version 4.7.0, as illustrated in figure 4. In the case of a successful call production, the signaling consists of the following messages: "channel request" "immediate assignment", CM service request "," authentication request "," authentication response "," cipher mode command "," full digit mode "before the start message. As regards the start message, the invention deviates from the signaling described in the GSM recommendation 04.08 In accordance with the GSR recommendation, the directory number of the called party is sent to the MSC in said start message, the which is also used to send information in the requested service in a carrier capacity information element, which is defined in the recommendation GSM 04.08, version 4.7.0, figures 10.71 - 10.79. According to the invention, since the call production signaling has started in the case of a ULL subscriber station from the channel request message immediately after the first digit marking, it is likely that when the signaling has proceeded to the step of sending the start message, the subscriber number of the called party has not been completely marked, and is thus not yet known. t_a requested service information is available, however, in case of a normal call, as the information in the "bearer capacity" parameters of the ULL subscriber station are stored in the GSM subscriber station, ie the radio unit . If the ULL subscriber station consists of more than one interface, eg, separate interfaces for speech and data, the parameters of "bearer capacity" can be configured individually for each interface. The radio unit thus chooses the "bearer capacity" parameters for the start message in accordance with which interface of the ULL terminal it is using. It can be concluded based on the first marked symbol, if this is a matter of normal call or a command of supplementary services. If the first character (digit) is a number, it is a normal call. In this way, it is possible to include all the other The information specified in the GSM recommendations, except for the directory number of the called party, in a start command according to the invention. The number or directory of the called party is normally transmitted in an information element of "called party BCD number" in accordance with the recommendation GSM 04.08, version 4.7.0, figure 10.73. Said information element is also shown in Figure 7. The legality of the information element is at least 3 octets, 13 objects at most. The called party number is normally transmitted in octets 4 - 13.

The called party number can be omitted from this information element when the octets 4 - .13 are completely omitted, and the value of the sign field is set to 000 (unknown), and the numbering scheme identifier to 0000 ( unknown). These definitions comply with the GSM recommendations, and are described in the GSM recommendation 04.08, version 4.7.0, table 10.81. With reference to figure 4, the start message is followed by the following messages in accordance with the GSM recommendation: "call in process," assignment command "and" complete assignment ", point at which a traffic channel has been already reserved for the connection between the radio unit MS and the MSC Simultaneously with the signaling procedure described above, the controller 20 of the radio unit receives dialing digits from the adapter 10, one at a time 'figure 6, step 603), records the digit in the volatile memory 25 (step 604), and verifies whether a "end of dial" signal has been received from the adapter 10 (step 605) The controller 20 continues in the circuit (603, 604 , 605) until all the digits have been received and stored, and the adapter 10 has sent the signal "end of dialing." In step 606, the called party number is sent to the MSC in a specific message of " address command. "Said" command "message The address is sent in accordance with the signaling diagram of Figure 4 after a traffic channel has been reserved for the connection between the radio unit MS and the MSC. In this way, it has been possible to carry out the marking, as well as the establishment of the connection and the call simultaneously, which significantly reduces the delay in the typical call production of the mobile communication system. It should be noted that the "address command" message is not sent if it is a matter of a supplementary service command instead of a call production • > rmal Figure 8 shows a possible structure for the "address command" message. The "address command" message shown in figure 8 is similar to the "start" message, which is defined in the GSM recommendation 04.08, version 4.7.0, table 9.70a, except for containing only two elements of information: an information element of "called party BCD number" in accordance with the GSM recommendation 04.08, version 4.7.0, figure 10.73, and an information element of "called party subaddress" in accordance with Figure 10.74. This last element of information is optional, and required only in some special cases. In addition, the "address command" message contains a call control protocol discriminator = 0011, a transaction identifier = Oxxx (where lae x's are defined by the radio unit MS), as well as a sign of separate message, which is defined to have the structure similar to the other call production messages, this is 0x001100 (GSM recommendation 04.08, version 4.7.0, table 10.3). In the figure, IEI represents the indicator of the information element. The MSC is arranged to initiate call forwarding to the called party in accordance with the called party's subscription number after receiving the "address command" message described above. Furthermore, in the signaling between the radio unit MS and the radio network, the < Normal messages to conclude call production in accordance with GSM recommendations, are sent after the "address command" message: "call in progress", "warning", "connection", "connection acknowledgment", as shows in figure 4. In the production of normal calls carried out from a fixed subscriber station, it is normally possible to dial only long-distance and international domestic numbers. The support of the local number of the fixed network can be carried out in accordance with the preferred embodiment of the invention as follows: the MSC automatically sends all the local numbers contained in the "address command" message to the PSTN. In other words, the MSC concludes directly from the use of the "address command" message with which a ULL subscriber is involved and that the local numbers refer to the PSTL numbers. The normal mobile subscribers employ a normal call production procedure and a normal production message of Lxarnadas. In this way, the MSC can conclude, based on the call production message, that a mobile subscriber is involved, and that local numbers refer to internal numbers within the mobile network. Taking this solution into account, the ULL suscpptor can dial the directory number in accordance with the numbering scheme used in the fixed network, but the routine procedures carried out by the MSC can be maintained unchanged, eg. Finally, a special case will be described, in which a number dialed from subscriber station 4 has started with some other character that is not a number, that is, a question of the command of supplementary services. In such case, the production of calls is initiated in the same way as in Figure 4 immediately after the first digit (character) has been detected in adapter 10, the "send" signal has been generated, but, subsequently the start, "ease" or "registration" message related to the supplementary services is sent from the radio unit MS to the MSC only after the controller 20 has received an "end of dial" signal from adapter 10. This is done, since it is not known which supplementary service is in question before the entire character strip has been marked. The last digit of the supplementary service commands is always "#", where the digit must be stored together with the other digits of the supplementary service command, as well as generating the "end of dialing" signal. In addition, since a supplementary service command must always end with the digit "#", the "end of dial" signal can not be initiated by time monitoring. The time supervision can only be used to ensure the interruption of the call production if the user interrupts the dialing before the final digit "#". No "address command" messages are sent together with B commands supplementary services. The start message in turn contains an information element called Facility, which is described in the recommendation GSM 04.08, version 4.7.0, section 10.5.4.15. Moreover, it is possible to determine in the MSC whether there will be signal information in the configuration of supplementary services, in addition to the exchange of the PSTN network, or whether it will store the information in its own database. The figures included and the explanation related thereto are solely designed to illustrate the present invention. Although the invention has been explained with reference to specific embodiments, it should be understood that the explanation is only made by way of example, allowing alterations and modifications without departing from the scope and spirit of the invention described in the appended claims.

Claims (4)

NOVELTY OF THE INVENTION CLAIMS

1. - A radio unit for connecting a subscriber station 4 of a fixed network, such as a telephone set, to the radio network of an ULL system, said radio unit (10,

MS) consists of means 13 for detecting the off-hook and hung states of said subscriber station; means 4 for generating signal tones to said subscriber station; a detector 15 for detecting dialing digits coming from said station of the signer, such as the digits related to the directory number of a p > ersona called; the radio unit is arranged to receive the digit detected from the directory number of the called party to be sent to the radio network after the dialing has been completed, further ccterized because the mail unit is ready to initiate the connection and production of a call in the radio network for the detection of the first digit or dialing digit. 2. A radio unit according to claim 1, further ccterized in that it consists of a meter 23 for measuring the time that has elapsed since the detection of the last digit of dialing, being arranged to send the digits of the directory number of the person called to the radio network when the time measured by the meter 23 reached a predetermined time.

3. - A radio unit according to claim 1 or 2, further ccterized in that it is arranged to send the digits of the directory number of the called party to the radio network immediately when the third dialing digit or any of the dialing digits subsequently detected is a predetermined dialing digit. 4. A radio unit according to claim 1, 2 or 3, further ccterized in that it is arranged to initiate the production of calls in the mobile communications network with a call production command (Figure 7) which does not contain the directory number of the called party, ready to send the directory number of the called party in an additional address message (Figure 8) after the end of dialing. 5. A method to establish a call from a station of the fixed subscriber, such as a telephone device, which is connected to the radio unit of the radio network of an ULL system, which considers the following steps: the fixed subscriber station dials the directory number of the called party, the directory number consists of several digits, the radio unit detects said dialing digits related to the directory number of the called party, received from the subscriber station When the radio unit receives said dialing digits until the end of the dialing, the radio unit sends the directory number of the called party to the radio network after the end of the dialing, further ccterized because the radio unit initiates the connection and the production of calls in the radio network immediately after detecting the first digit or dialing digits before the end of marking. 6. A method according to claim 5, further ccterized in that the radio unit measures the time elapsed since the detection of the last digit, the unit of tdio assumes that the marking has ended when the time measured reaches a predetermined time. 7. A method according to claim 5 or 6, further ccterized by the marking of a digit predetermined by a user to indicate the end of the dialing, the radio unit sends the directory number of the called party to the network of radio immediately if the third digit or any of the subsequent dialing digits is the default digit. 8. A method according to claim 5, 6 or 7, further ccterized in that the radio unit initiates a call production in the radio network with a call production command that does not contain the directory number of the part called, the radio network initiates a call production only after verifying from the scriptor data that the subscriber's call production commands are accepted if the directory number of the called party, the radio unit sends the number of The called party directs to the radio network in an address message subsequently, during the production of calls when the dialing is completed, the radio unit initiates a call forwarding in accordance with the directory number of the called party once who has received the address message. 9. A method according to claim 8, further characterized by the recognition of the numbers > in the address message as local numbers of the fixed telephone network and the sending of the call to the fixed network. 10. A method according to claim 8 or 9, further characterized in that the call production command is a start message in accordance with the GSM recommendation 04.08, further characterized by the digits related to the part number of the directory If the call is omitted from the information element of BCD number Q called party, and the value of the sign field, as well as the value of the identifier of the numbering plane are programmed as unknown, the address command contains at least the following information elements. included in a start message in accordance with the GSM recommendation

04. 08: call control discriminator, transaction identifier, message type, subaddress of the called party. 11. An ULL system consisting of a radio network and a radio unit (10, MS), by means of which a fixed subscriber station (1), such as a telephone set, is connected to the radio network , the radio unit consists of means 13 for detecting hang-up and hang-up states of the fixed subscriber station, means 14 for generating signal tones towards the subscriber station 1 of the fixed network, a detector 15 for detecting the digits of marked, such as the digits related to the directory number of a called party received from the station of the fixed subscriber 1, the radio unit is arranged to receive (25) the detected Omeros of the called party to send them towards the radio network ( BTS, BSC, MSC) after the end of the dialing, further characterized in that the radio unit is responsible for detecting the first digit or dialing digits to initiate connection and call production in the radio network with a command of call production (Figure 7), which does not contain the directory number of the called party, the radio network is ready to initiate a call production only deep? ee to verify the subscriber's data (VLR) that the call production commands of the receiver station are accepted without the directory number of the called party, the radio unit is ready to send the directory number to the party called to the radio network in a address message (Figure 8) later during the production of the call after the end of dialing, the radio network is ready to initiate the call forwarding in accordance with the directory number of the called party once it received that message from address.