MXPA98002425A - Method and system for the exchange of signals in a communication network - Google Patents

Abstract

The present invention relates to a communication system and a method for exchanging between a public telecommunication network and at least one communication arrangement through the communication system. The communication system comprises a network adapter unit comprising a first signal input that is connectable to the public telecommunication network and a second signal input, further comprising at least one subscriber adapter unit comprising a third signal input for the exchange of signals with the second signal input, and a fourth signal input that can be connected to the communication arrangement. The subscriber adapter unit is arranged to initiate a communication session in response to a connection signal. The network adapter unit is arranged to produce a determination message in the network adapter unit in response to the reception, at the first signal input, of a disconnect signal from the public telecommunication network.

Description

METHOD AND SYSTEM FOR THE EXCHANGE OF SIGNALS IN A COMMUNICATIONS NETWORK TECHNICAL FIELD OF THE INVENTION The invention relates to a method for exchanging signals in a communication network. The invention also relates to a communication system that connects a public telecommunications network.

Description of the Related Art A conventional public telecommunications network is based on the fact that telephones and other communication arrangements are connected to the central of the telecommunications network by means of fixed wired connections. The signals, for example, telephone numbers, introduced that are generated by the telephones are sent in a normal way through wired connections to a central in the telecommunication network. Furthermore, it is known to connect specially adapted telephones to the telecommunications network by means of a radio connection. U.S. Patent No. 5,117,450 describes a specially adapted telephone consisting of a radio transceiver, a microcomputer with a memory. When the telephone conversation starts by telephone, each entered digit is stored in the memory, and a verification of the validity of the phone number entered in the telephone is performed locally before the connection with the telephone number that was entered is established. This phone accordingly must be equipped with a large amount of information about the different combinations of valid numbers and the amount of information becomes considerable to allow international telephone conversations as well. British Patent No. 1 115 315 describes a first arrangement consisting of a portable telephone which is coupled to a relay-controlled radio transmitter and a first radio receiver. When a telephone conversation is to be initiated from the portable telephone, the radio transmitter is activated by sending a precise tone signal via radio to a second receiver included in a second arrangement. The second arrangement connects to a telephone line. The second receiver sends the received tone signal to a first filter that is selectively reception of a precise-tone signal, a relay is activated that switches on a second transmitter s - ^ i ^ to send a tone marked as a radio receiver The patent O 95/15664 describes a radiotelephone system consisting of a subscriber unit that in a wireless form communicates with a Local Access Mobility Administrator (AMAL). The AMAL is connected to a local station. According to WO 95/15664 the subscriber unit sends a disconnection message to the AMAL when a consumer ends a call. The AMAL sends a release message to the subscriber unit. The subscriber unit sends a complete release message to the AMAL and the AMAL returns the radio channel to vacant.

SUMMARY The present invention is concerned with the problem of establishing a connection between a communication arrangement and a telecommunication network in a way that is not complicated for the user. The invention also relates to the problem of achieving wireless connections between a public telecommunications network and a communication arrangement with a standard signal interface, in accordance with a standard for wire-based connections, with a standardized public telecommunication network. An example of this telecommunication arrangement is a conventional telephone for connection to a telephone socket. The invention is also interested in the problem of producing a method for communication between the communication arrangement and a public telecommunication network, which method allows the operation of subscriber telephone services, wherein the communication arrangement is connected, wirelessly, to the public telecommunication network. An objective of the invention is to solve the aforementioned problems. These objectives are achieved with a telecommunication system consisting of a network adapter unit and a subscriber adapter unit connected to a public telecommunication network, to which a communication arrangement adapted to the telecommunication network can be connected. An exchange of information occurs between the network-adapter unit and the subscriber-adapter unit, in accordance with any of the transfer rules chosen. The network adapter unit consists of a first interface means for communication with the public telecommunication network, and a first transceiver means that connects to the first interface means. This subscriber-adapter unit contains a second transceiver means for communication with the first transceiver means, and a second means interface for communication with the communication arrangement. The aforementioned problem is solved, according to with the invention, with a method for exchanging signals between the communication array and the public telecommunication network by means of the communication system. The method allows the communication array to function in the same way as if the communication array was directly connected to the public telecommunication network. In this way, the connection of, for example, a conventional telephone with the subscriber-adapter unit is allowed. A communication session consists of a phase to establish the channel, a phase of sañalización of the user and a phase of disconnection of the channel. During the signaling phase of the user, the signals are sent in both directions, in real time, between the first communication arrangement and the public telecommunication network through the communication system. The method comprises the step of initiating a communication session due to a connection signal. The connection signal is a reply signal that is produced by, or due to, the first communication arrangement, or a call signal that is sent to the network-adapter unit from the public telecommunication network. According to the invention, a communication session can be started independently of any of the characters that are entered through the buttons of pressure of the communication arrangement. To establish the channel, a communication channel is established during the phase and the signals are transferred between the first input of the signal and the fourth input of the signal through the communication channel during the user's signaling phase. The communication channel is disconnected during a phase of disconnection of the channel. The phase of disconnection of the channel starts due to a disconnection signal that is sent from the public telecommunication network.

BRIEF DESCRIPTION OF THE DRAWINGS In order that the present invention is more easily understood and realized, it will be described by means of the illustrative examples with reference to the accompanying drawings, in which: Figure 1: shows a schematic drawing of a telecommunication network, according to one embodiment of the invention; Figure 2: shows a flowchart for a communication session according to an embodiment of a method according to the invention: Figure 3A: shows a block diagram of a subscriber-adapted unit, according to an embodiment of the invention; Figure 3B: illustrates an energy spectrum for a message; Figure 4: shows a block diagram of a network-adapter unit, according to an embodiment of the invention; Figure 5A: shows a flowchart for a phase to establish a channel, according to one embodiment of the method according to Figure 2; Figure 5B: shows a more detailed flowchart for a communication session, according to Figure 2, with a transparent signaling phase, according to a method modality; Figure 5C: shows a flow diagram for a channel disconnection phase, according to a method modality according to Figure 2; Figure 6 shows a block diagram of a first embodiment for a transceiver unit according to the invention; Figure 7 shows a diagram of a second embodiment for a transceiver unit, according to the invention.

Detailed description of the modalities In the following description the means and Mutually similar characteristics in the different modalities are indicated with the same reference number.

Figure 1 shows a communication network 10 consisting of a public telecommunication network 20. The public telecommunication network 20 comprises stations 22, 24 and 26, respectively, which allow the creation of a communication channel between the communication arrangements , which through the connections 27, 28, 29, are connected to the telecommunication network 20. A first communication arrangement 304C is a telephone, a telefax or a computing device that is arranged for communication with the public telecommunication network 20. The first communication arrangement 30 can also be a mobile telephone that connects to the public telecommunication network 20. An adapter unit of the network 60 has a first connection plug CL which is connectable with the public telecommunication network 2C. According to a variant of the invention, the adapter unit 60 is a radio unit. The radio unit 60 consists of a radio antenna 68 which allows the radio connection with a subscriber adapter unit 70. The subscriber adapter unit 70 contains a radio antenna 80, as well as a connecting plug 90. There may be a plurality of subscriber subscriber units 70 for cooperation with an adapter unit of ¡S network 60. The connection plug 90 is connectable to a connection socket 92 in a second communication arrangement 100.

The communication arrangement 100, according to a version of the invention, takes the form of a telephone. The communication arrangement 100, in an alternative mode, can be formed by a fax arrangement or a computing arrangement that is adapted to communicate with the public telecommunication network 20. The computing arrangement consists, for example, of a communication modem. with a telecommunication network. The radio unit 60 and the radio unit 70 are comprised in a communication system 110, which through the connection plug 65, is connectable to the public telecommunication network 20 and to which, through the connection plug 90 , can be connected with a communication arrangement 100.

METHOD FOR CARRYING OUT A COMMUNICATION SESSION According to one embodiment of the invention, communication through the communication system 110 is carried out in three consecutive phases or process steps. This is described below in relation to the figure. For example, the procedure starts when the Y The user picks up the portable telephone from the communication arrangement 100. The subscriber adapter unit 70 contains the means for detecting that the handset has been lifted and, according to the procedure, then a first phase S120 begins. During the first phase, the channel setting phase, a CH1 traffic channel is established between the subscriber adapter unit 70 and the network adapter unit 60. When the traffic channel CH1 is established a second phase S130 is started. During the second phase S130, signaling is possible between the communication arrangement 100 and the public telecommunication network 20. During the second phase S130, the signals sent from the telecommunication network 20 to the connection socket 65 are sent through from the communication system 110 to the connection socket 90 and vice versa,. This exchange of signals between connections 65 and 90 is mentioned as transparent signaling in the following, and it can be said that the second phase S130 is in a transparent signaling condition. The second phase S130 can also be called the user signaling phase. When certain conditions have been met, the communication system is arranged to complete the second condition and go to a third phase S140. These conditions are described in more detail posterionteiite in relation to figures 5B. During the third phase, the disconnection phase of the channel S14Q, the transparent signaling is broken and the communication channel CH1 is closed. The division described above, of a communication in three consecutive phases, makes it possible to connect a conventional telephone 100 to the connection 90, and according to the invention, by this it is possible for the user of the telephone 100 to operate the telephone almost as if directly connected to the public telecommunication network 20.

Subscriber adapter unit Referring to FIG. 3A, a mode of a subscriber adapter unit 7C is described. As already described, the unit 70 consists of a connection plug 90 to which a communication arrangement 100 can be connected. The connection plug 90 is connected to the local interface 150. The local interface 150 supplies the connection plug 90. with signals corresponding to signal arrangements in a public telecommunication network, which is described in more detail below. When a user desires a connection from the communication array 100 to the public telecommunication network 20 (see FIG. 1), the user a reply signal. When the communication arrangement is a telephone with a mirro-telephone or handset, the answering signal is activated by lifting the handset. According to a modality of the local interface 150 this consists of a voltage source 160 and a current detecting unit 170, whereby a voltage is sent to the communication array 100. To produce the answering signal the user operates a switch 180 by which the current consumption of the communication array 100 is modified in such a way that it is recognizable by the detector unit. of current 170. The detector unit 170 then supplies a reply signal to an output 190. In an alternative mode, the response signal can be actively produced by means of the communication array 100. The answer signal is sent to an omnibus bus data or common collector 192 which is connected to an input of the signal 194 of a signal processing unit 196. The signal processing unit 196 contains an input 197 which is connected to an input 198 of a transceiver unit 200 Upon receipt of the answer signal per entry 194, an order is sent to entry 198 to initiate a procedure to establish a signal signal for the exchange of signals with the adapter unit 60. The transceiver unit 200 consists of a connection 230 for the exchange of signals with a first adapter unit 60. During the transparent phase S130 the local interface 150 is arranged to reform the signals that the public telecommunication network 20 sends to the first adapter unit 60. During the phase of connection of the channel and during the phase of disconnection of the channel, certain signal exchanges are carried out by means of the information blocks. which are transferred through the traffic channel. However, during the signaling phase of the user the exchange of the signals in band and of the out-band signals is carried out simultaneously through the traffic channel. Referring to Figure 3B, the function of a signal processing unit 196 according to one embodiment of the invention is described.

Signal exchange The signal exchange is between the units 60 and 70, during the transparent phase S130, it can be considered as the exchange of messages M, e both directions. Consequently, a Mt message may consist of, for a part, seiTf-les within Mu band and on the other hand, out-of-band signals M3. An in-band signal is a signal that has a sequence within the range of the voice frequency. An out-of-band signal is a signal that has a frequency outside the range of the voice frequency. According to one embodiment of the invention, the in-band frequency range is defined as 300 Hz to 3400 Hz.

By means of the common collector 192 the out-of-band signals are supplied between the local interface 150 and the processing unit of the signal 196. Examples of the out-of-band signals that are sent to the input of the signal 90 are: the signal of answer, the load signals and the polarity signals that establish the polarity that the voltage must have. The signal processing unit 196 further has a connection 210 which is connected to a connection 220 of the local interface 150. The exchange of the signals within the Mu band, such as, for example, the telephone number signals marked by a user as DTMF (Dual Tone Mulitrequency) signals and the voice of the user, etc. it is carried out between the connections 210 and 220. The signal processing unit 196 is arranged to produce an M_ message and sends it to an input 232 on the transponder unit 200 er. response to signals and Mu received at inputs 194 and 210, respecti-gamente. The unit 196 is further arranged in response to a message ML received from the inputs 232 to send the in-band signal Mu corresponding to the input 210 and / or an out-of-band signal Ms, correspondingly, to the input 194. The interface local 150 consists of a computing unit 240 which, through a common collector 242, can communicate with the common collector 192. { Figure 3 &). The counting unit 240 is further connected to a memory means 244 and to a configuration means 250. Configuration of a series of selected standard signals can be done by means of the configuration means 250. When the unit 196 sends a certain out-of-band signal, for example a load signal, to the input 194, it is sent through the common data collectors 192 and 242 to the counting unit 240. The computing unit 140 it reads standard configuration that has been made by the configuration 250 and then sends a corresponding out-of-band signal to the second connection plug 90, according to the selected standard. According to one embodiment, a message ML has an energy spectrum comprising a bandwidth B i .: extending between the limiting frequencies f 1 and 1. In order to produce a ML message that can contain signals within mu band and out-of-band signals M3, each of these is placed in the frequency domain, as illustrated in Figure 3B. According to one embodiment of the signal processing unit 196, the inband signals are assigned to a fixed bandwidth B. within the bandwidth B "" and the out-of-band signals are assigned to a bandwidth of fixed band B3 disjunctive. According to another embodiment of the processing unit 196, the proportion that each bandwidth, Bu and Bs, takes of the total bandwidth BH is adjusted depending on the transfer requirements. The bandwidth Bu is limited by the limiting frequencies f¿ and f4, and the bandwidth B "is limited by the limiting frequencies f and f". According to one embodiment of the invention, the relationship between the frequencies is as follows: According to another modality, by combining the digital bit streams Mu and Ms, a digital message Mt.

The network adapter unit Referring to FIG. 4, an embodiment of the network adapter unit 60 is described. As already described, the network adapter unit consists of a connection socket 65 for the communication connection with the network adapter. public telecommunication network 20. The adapter unit of the network 60 consists of an interface of the telecommunication network 300 which is connected to the connecting plug 65. The interface of the telecommunication network 300 is arranged during the transparent phase to reform or retransmit the signals that the first communication array 100 sends at the signal input 90. The interface of the telecommunication network 300 has a connection 310 which is connected to a connection 312 in the processing unit of the signal 314. The processing unit of the signal 314 is connected through a input 316 with an input 320 in a transceiver unit 330. Transceiver unit 330 is connected to a connection 340 for signal transfer with one or more subscriber adapter units 70. A common collector 342 connects an input 344 in the transmitter unit. processing of the signal 314 with an input 346 on the interface of the telecommunication network 300. The processing unit of the signal 314 works in a similar manner with the processing unit of the signal 196 already described. The telecommunication interface 300 consists of a counting unit 348 with a memory 350. The counting unit is connected to a configuration means 352 for configuring the standard of the telecommunication network. With the intention of allowing the connection of the adapter unit of the network 60 with the public telecommunication networks, which follow different standards, the unit 60 accordingly consists of a memory medium 350 with information about the way in which each of the out-of-band signals is coded according to the respective standard. When a certain out-of-band signal is received from the telecommunication network 20 through the connection 65, the signal is translated according to the parameters of the configuration means 352 and the message MB of the corresponding system is sent by the computing unit. 348 to the processing unit of the signal 314 through the common collector 342. According to one embodiment, the configuration means 352 consists of a memory location in a non-volatile memory medium, such as, for example, a EEPROM. On the contrary, when an out-of-band signal is sent to the connection socket 90 from, for example, in communication arrangement 100, then this out-of-band signal changes to a corresponding system message, which through the communication is transmitted to the transceiver unit 330 (figure 1). The system message is translated by means of the counting unit 348 with the aid of the configuration means 352 and the corresponding bandwidth signal is sent to the connection plug 65. According to one embodiment of the invention, the exchange of the signals are made between the unit adapted. »« The network 60 and the subscriber adapter unit 70 are connected by means of radio communication and, in this case, the connection 3 Q is connected to the radio antenna 68, as already described.

Initiation of a communication session by means of a mmmic arrangement The establishment of a connection from the communication array 100 with the public telecommunication network 20 is described below in relation to FIGS. 1, 3, 4 and 5A. The process is initiated by the communication arrangement 100 indicating that a reply signal will be generated. As a consequence of the transceiver unit 200 (FIG. 3A) receiving the answer signal in the trigger input 198, a call message is sent over an ACC access channel. The call message is sent to the adapter unit of the network 60. This is illustrated by the step of the process S360 in Figure 5A. According to one embodiment of the invention, the same ACC access channel is used for a plurality of subscriber units within a zone. The next step S370 in the method includes the subscriber transceiver 200 which sends a request for a traffic channel CH1 to be established. This request is sent through the access channel ACC. The request is received on the central transceiver 330 and it searches for an available traffic channel. The central transceiver 330 allocates a traffic channel CH1 (see step S380 figure 5) and sends an order (step S390) to the local transceiver 200 to switch to the assigned traffic channel. The authenticity of the subscriber adapter unit 70 is then verified by means of signaling in the traffic channel CH1 (step S400 in FIG. 5A). This occurs through the network adapter unit that requests the subscriber adapter unit 70 to provide an identity code. The subscriber adapter unit 70 provides an identity code, through the assigned communication channel CH1, to the network adapter unit 60. This can be done by a unique code that is read out of the memory unit 244 and is sends to the transceiver unit 200. According to one embodiment, the subscriber adapter unit 70 sends both an identity number NI and a serial number of the hardware NS. The identity series number identifies the subscriber while the team serial number identifies the equipment used by the user. When the identity numbers are received. The network adapter unit 60 verifies that the codes received correspond to the corresponding codes that are stored in a memory medium in the adapter unit of the network 60. According to a second embodiment, both the subscriber's adapter unit 70 and the adapter unit of the network 60 are equipped with the means counter that increments each value at certain times, such as each time a channel connection is made. The subscriber adapter unit 70 inputs not only the calculated values but also the identity number NI and the serial number of the hardware NS to a code unit, and this unit supplies, by means of an algorithm, a modified identity code MIDA. The modified identity code is sent through the traffic channel to the network adapter unit 60. The network adapter unit 60 also comprises a code unit and produces, in the same way, a modified identity code MIDN depending of the calculated value in the calculated value of the network adapter unit. The adapter unit of the network 60 compares the MIDA code received from the subscriber's adapter unit with the MIDN code and, if the codes correspond, allows the communication session to continue. Once the authentication has been established, the channel setup phase ends and the transparent phase S130. In accordance with one embodiment of the invention, step S410 is performed in parallel with step S400, whereby the transparent phase S130 is started after step S390. Without verification of authenticity it shows that there is no correspondence, the disconnection phase of the channel immediately begins. When the authenticity check shows that the subscriber unit is correct, the assignment of communication continues. During step S410 the interface of the communication network 300 activates a line to the public telecommunication network 20 and receives a dial tone on the connection 65. The dial tone is an example of a message Mu which the interface 300 sends to the processing unit of the signal 314, which in turn integrates the Mu into a message M, _. The message ML is sent to the input 320 of the central transceiver 330. The central transceiver encodes and / or modulates the message to transfer it through the traffic channel CH1 to the local transceiver 200 in the subscriber adapter unit 70. The local transceiver decodes and / or demodulates the received signal through the traffic channel CH1, reforms the ML message and sends it to the connection 232 (Figure 3A). The message is sent to the processing unit of the signal 196, which separates the signals within the Mu band from the out-of-band signals Ma and sends the dial tone to connection 220 of local interface 150. The dial tone received by connection 220 is sent to connection 90 for further transmission to communication array 100. During the transparent phase S130, the local interface 150 reforms the out-of-band signal 5 which, the public telecommunication network 20 sends to the connection 65 of the adapter unit dt the network 60. In a corresponding manner, the interface. of the telecommunication network 300 reforms the out-of-band signals, which the communication arrangement 100 sends to the connection 90 of the subscriber adapter unit. The connection procedure of the channel S120 is carried out, according to the invention, within a certain time interval from when a reply signal is received from the communication array 100. This time interval can be selected to be so short that the user of the communication array 100 experiences its communication array as if it were directly coupled to the public telecommunication network 20. The time interval from which a reply signal is formed until the transparent signaling condition is initiated as less than 15 seconds. According to one modality, the time interval is between 0. 1 and 10 seconds. According to another modality, the time interval is between 0.1 and 1.0 seconds. According to a preferred embodiment, the time interval is less than 0-5 seconds, for example, between 0.01 and 0.5 seconds, for example, between 0.01 and 0.5 seconds. During the transparent phase S130, the communication array 100 then functions almost as if it were directly connected to the telecommunication network 20. In the foregoing, a modality of a channel connection phase has been described wherein the unit 70 requests a channel of communication. traffic by means of signaling through an access channel, and where the unit 60 allocates a traffic channel. This means that the unit 60 and its transceiver unit 330 observe the radio channels and allocate an available channel with the request from an air transceiver.

Starting a communication session by means of a telecommunication network The unit 60 and its transceiver unit 330 will allocate an available traffic channel upon receiving a connection signal from the telecommunication network 20. The connection signal is a call signal. In an alternative mode, the session starts by receiving an investment of polarity from the telecommunication network. When a call signal is received through a signal input 65, it is translated by the counting unit 348 and a message is sent to the transceiver unit 330 to send a call through the access channel ACC. The call consists of an instruction addressed to the selected subscriber adapter unit for transfer over the allocated traffic channel. When the connection is established through the traffic channel, the call signal is sent as a message from the system to the user's adapter unit. In an alternative mode, the call signal can be sent by means of data frames within the bandwidth of the message BM.

Transparent phase Referring to Figure 5B, an example of a communication session is described in order to clarify the characteristics and advantages of the invention. As described above, the set phase of the channel S120 is initiated by a user of the communication array 100, which gives rise to a connection that is formed between the adapter unit 70 and 60 (see FIG. 5B and FIG. Figure 1) . The transparent phase 3130 is then initiated by means of the adapter unit of the network 60 by activating a line for the public telecommunication network 20, by means of which an exchange unit or exchange 22 sends a status signal to the network adapter unit (step S410). This state signal may be a dial tone signal which states that the telecommunication network is ready to receive signals from the array 100, in an alternative mode, it can be a status signal that establishes that there is some error in the telecommunication network or that all the available lines are occupied. In step S414, the unit 60 receives the status signal and the signal is sent forward by the communication system 110 to the communication array 100.

The communication array 100 receives the status signal and obtains the possibility to act on the status signal (step S416). When the status signal is a dial tone and the communication arrangement is a telephone, the user of the telephone can judge that the status signal means that the telecommunication network is activated and ready to receive other signals from the communication arrangement. 100. In this case, the user in the next step S418 can dial the numbers by means of the press buttons of the telephone 100, speak the messages, etc. Each signal that is input to the unit 70 through the communication array 100 is sent to the central unit 22 in telecommunication network 20 (see Figure 1). The user can, for example, in step? 418 enter a code for some telephone service. The characters entered by the user can be encoded by pulses or encoded by tones. Once the user has finished his communication he can either lower the handset or perform some other corresponding action to close the session, as illustrated in step S420 of figure 5B. If during step S416 the user judges that the status signal means that the telecommunication network is not ready to communicate, he can choose to descend the handset (step S420). When the handset is lowered or the corresponding action is taken in the communication arrangement 100, this is represented in step S422 and a received answer signal is made and sent to the common collector 192 (FIG. 3A) in the same way as it is described for the answering signal. During step S422 of the procedure shown in Figure 5B, the received disconnect signal is integrated into the message Mt (Figure 33) and sent from unit 70 to unit 60. It should be noted that the transparent signaling status 3130 within the communication system 110 is maintained all the time from when the phase of This is done by channel S120 until the connection is broken during the disconnection phase of channel S140.

End of a communication session The following will describe how the disconnection can be done by the communication array 100 and the subscriber adapter unit 70. The system message "disconnection received" that occurs in step S422 is received (step S424 of FIG. 5B) by the counting unit 348 (FIG. 4) in the adapter unit of the network 300, and as a consequence of this, the unit 300 sends the corresponding normal signal "received disconnection" to the signal input 65 for send to telecommunication network 20 (step? 426, figure 5B).

According to the invention, the telecommunication network is then allowed to determine if and when the connection between the telecommunication network 20 and the communication arrangement 100 should be broken. In other words, the connection and the transparent signaling condition S130 remain at least until the public telecommunication network sends a disconnection signal to the signal input 65 of the network adapter unit. According to a standard for public telecommunication networks, a disconnection signal occurs after a "received disconnection signal" is received. from subscriber 100 for a predetermined time. This time can be, for example, 5 seconds. The disconnection signal is sent, for example, from the control panel 22 to the adapter unit of the network 60. The method step S428 shown in FIG. 5B illustrates the adapter unit of the network 60 receiving a disconnection signal from the network. the public telecommunication network. The channel disconnection procedure is initiated due to the disconnection signal. Referring to FIG. 5C, an example of a method for the disconnection phase of the channel 3140 is described. In a first step S430 of the channel disconnection phase., the interface of the network 300 produces a termination message "central disconnection" as a consequence of the disconnection signal. The termination of the message is formed by the counting unit 348 and sent to the unit 70. In a next step S432, a check is made if the communication arrangement produces a "received disconnection signal" or a "busy signal". If this verification shows that communication array 100 is sending a "received disconnection signal", step S434 must be performed afterwards. If the verification shows that the arrangement of 2 and communication 100 sends the "busy signal", a stopwatch function is activated (step S 33) in the counting unit 348. The stopwatch function is established for a predetermined period of time and during this time the interface unit 300 is arranged to indicate a busy state if a call signal is received from the telecommunication network 20. In this way the purpose of the communication arrangement 100 seen from the functions of the telecommunication network is achieved as a directly connected telephone. If "busy signal" is still indicated by communication array 100 at the end of time, the procedure continues despite this, with step S434.

During the next step S434 the subscriber adapter unit 70 receives the message "central disconnection". The message is sent through the collectors 192 and 242 to the counting unit 240, which consequently ensures that the interface unit 150 sends to the signal input 90 the norm x signal that the telecommunication network must produce with a "disconnection received" signal. This standard signal is, for example, a certain voltage polarity that is sent to the communication array 100.

During the next step? 436, the computing unit 2-10 generates a message "local disconnection" and this is sent in the manner already described to the adapter unit of the network 60.

During step S438 immediately following, the message with the content "local disconnection" is received by the network interface 300, and the computing unit 348 sends, as a consequence of this, the out-of-band signal "disconnection" to the input of signal 65, for another transmission to the public telecommunication network 20. If the disconnection phase of channel S140 was initiated in communication array 100 producing "disconnection", step 3434 means that the signal "disconnection" is maintained and the continuously indicates the public telecommunication network 20. In step S440, the counting unit 348 produces an order to disconnect the traffic channel CH1 and this command sends it to the transceiver unit 330, which therefore disconnects the traffic channel . The disconnection or release of a channel means that a channel can subsequently be used for communication between another local adapter unit and the central unit 60 or by two completely different units. According to a second embodiment of the disconnection procedure, the step S430 is carried out in the same way as in the previously described mode, but after this the step S434 is carried out. During step S434 the subscriber adapter unit 70 receives the message "central disconnection". In response to this message, the subscriber adapter unit 70 indicates to array 100 that telecommunication network 20 has been disconnected. The sign of disconnection may be a change in the polarity of the voltage supplied to the array 100. After this step S432 is performed. In step? 432 a check is made if the communication array produces a "disconnect signal" or a "busy signal". If this verification shows that the communication array 100 is sending a "disconnection signal", steps 5436 to 440 should be reviewed, as already described. If the verification shows that the communication array 100 sends the "busy signal", a message for this effect is sent from the unit 70 to the unit 60. In response to this "busy message" the unit 70 disconnects the channel from CH1 traffic, but keeps the "busy" state towards the telecommunications network 20. The status of "busy" will remain until the unit 60 receives a new message from the unit 70 with the information that the array 100 produces the "signal of disconnection. " The new "disconnection message" of the unit 70 can be transmitted on the ACC access channel. In an alternative mode, a specially adapted communication session, which includes a channel setting phase 3120, is performed only to send the message that the "Disconnection signal" has been received from the array 100. According to this version, the new "disconnection message" is transmitted to a traffic channel. The traffic channel CH1 is disconnected by means of the unit 60 upon receipt of the new "disconnection message" and the unit 60 also sends the "disconnection signal" to the telecommunication network 20. In this way the objective of the arrangement is achieved. of communication 100, seen from the functions of the telecommunication network, as a directly connected telephone.

According to the third mode of the disconnection procedure, the disconnection phase operates as described in the second embodiment until step S432 has been performed. The third embodiment differs in that if the verification shows that the "busy signal" is sent by the communication array 100, a message for this effect is sent from the unit 70 to the unit 60 to cause unit 60 to indicate "busy "to the telecommunication network 20 and the traffic channel is maintained until the unit 70 receives a" disconnection signal "and the corresponding message has been received in the unit 60.

End of the communication session from another subscriber arrangement Otherwise, the disconnection can be initiated by another subscriber, for example, telephone 40, being connected to communication array 100 and now producing a "disconnection signal". The "disconnection signal" produced by the telephone 40 makes in a known manner, that the telecommunication network 20 sends a disconnection signal to the input of the signal 65. Subsequently the channel disconnection procedure is performed from the step S430, according to one of the forms described above.

Direct connection service As described in connection with FIG. 5B, the invention means that a connection between the communication arrangement 100 of the subscriber and the public telecommunication network is achieved as a direct consequence of a reply signal produced by the communication arrangement. ICO communication. The subscriber does not need to enter any number to achieve the connection with the telecommunication network 20. This feature of the communication system 100 means that a direct connection service is possible as will be described below. As described in connection with Figure 5B, the user may, during clear ramp 3130, receive signals from and send signals to the public network of telecommunication 20. Then, the user can, for example in step S418 described above, enter a code identifying a telephone service. The service code is sent through the communication system 110 to the telecommunication network 20 and in this way the public telephone service can be ordered and obtained in the same way as if the communication arrangement 100 was directly connected to the network of telecommunication 20. Next, a procedure for ordering a direct connection service will be described. The user enters a service code that identifies the service order, such as the dialing sequence * 700 * and the telephone number to which the user will be directly connected when he picks up the handset the next time. The marking sequence can be, for example, * 700 * 875634 This sequence of symbols is sent to a memory means 438 in a central 22 that is part of the public telecommunication network 20 (Figure 1). The exchange 22 also receives a code A from the calling user, i.e., from the network adapter unit 60 or the subscriber adapter unit 70. In another mode, the exchange 22 can determine a code A as a result of the connection physical that was activated. Code A identifies the consumer of the service. Upon receiving the code to order a direct connection service, the code A is used as a pointer for the memory location in the memory means 438 and the number entered by the user of the telephone or a B code corresponding to the telephone number stored in the position indicated in the memory is stored. phone number entered. According to the invention, the user can also decide the time that will elapse from when he picks up the handset and the "busy" signal to start the direct connection. When entering, for example, the sequence: * 700-time code * phone number B # where the time code is, for example, 5, the user can establish that the direct connection service is activated 5 seconds after it has the handset has been lifted, in the event that the user has not entered any characters before this moment. In this way, the telephone 100 can be used as a normal telephone, with the additional advantage that the predetermined connection is made if no dialing tones are entered during the predetermined time. The characters can be entered for example, with DTMF coding in a form that is common in modem telecommunication equipment. When this connection service has been ordered Directly the 100 telephone user can replace the handset. When, after this the handset is lifted, the telecommunication network 20 will receive in the normal manner an A code identifying the part connected to the telecommunication network. The code A is used in the telecommunication network 22 to signal a particular exchange 22 and the position in memory where it appears that some service has been ordered. The code A, or a corresponding code, is used to indicate the position where the number entered by a user or a corresponding code determined by the system is stored. The exchange 22 reads the designated code and connects a connection for the corresponding subscriber connection 23 and for the communication arrangement 40 connected to the subscriber connection (FIG. 1). A direct connection service, according to the invention, can be ordered and used from any communication arrangement 100, 30 or 40 and the connection can then be made for any of the other communication arrangements that are connected to the public network of telecommunication 20.

Method of signal transfer In the manner described above, a signal transfer between the central transceiver 330 and the local transceiver 200 can be carried out by means of the radio communication. The transceiver 200 modulates the ML messages received by the input 232 and as a consequence of this sends a signal transmitted to the antenna 80. According to a first embodiment, the radio communication is carried out by means of frequency multiplexer FDMA. As illustrated in Figure 5, the transceiver 200 comprises a high frequency generator 50C that can send a carrier frequency signal. The high frequency generator 500 is connected to a modulator 510, which is also in connection with the input 232. The modulator 510 is arranged to modulate the message Mt in the carrier frequency signal and send the resulting transmit signal to the output 230. By means of a counting unit 520, the frequency of the carrier frequency signal can be verified and controlled so that it achieves frequency multiplexing. In this form, for example, different traffic channels CH1 and CH2, respectively, can be defined by the different carrier frequencies. According to a second embodiment, the radio communication is based on TDMA time multiplexing. According to this modality, the frequency generator high is adjusted to supply a precise frequency, and the computing unit 20 regulates the modulator 510 to produce transmission signals only within precise timeslots. Through a combination of FDMft. and TDMA, a traffic channel can be defined by a defined carrier frequency and precise time slots. According to a third embodiment, the code multiplexing is used to transfer signal between the local transceiver 200 and the central transceiver 330. According to this embodiment, the transceiver 200 comprises a sequence generator 530 (see figure 7). The sequence generator 530 is under the control of the counting unit 520. According to a variant of the third embodiment, a bit stream Su produced by the sequence generator is supplied to a mixing module 540. The mixing module 540 converts the Mu message received from the 232 input into a digital bit stream SH. The mixing module is arranged in a form similar to a signal, multiplies the bit stream of the message S;, t with the bit stream of the sequence S "and supplies the resulting signal to the carrier wave modulator 510. The carrier wave modulator with this produces a signal according to a principle that is usually called CDMA.

According to a second variant of the third embodiment, the sequence generator is arranged to send a stream of Sd bits to the high frequency generator and thereby modulate the carrier frequency signal to achieve the multiplexing of the code of the frequency. frequency variation. Various embodiments of the transceiver 200 have been described in the foregoing with the description based on the transmission of a message ML from the transceiver 20C. The transceiver 200 further comprises the means for receiving, in the corresponding form, signals at the input 230 and to demodulate these signals. The transceiver 200 thus consists of the demodulator means for the demodulation of the signals multiplied in frequency, in time and code received. In connection with the detailed description of the transmission medium, those skilled in the art will understand how to integrate the corresponding receiving means and therefore this text will not refer in greater detail to this description.The central transceiver 330 arranged in the adapter unit of the network 60 operates in a manner corresponding to the local transceiver 200. As described in connection with FIG. 1, the output of the transceiver is connected to the radio antenna. According to a variant of the invention, the antenna 80 is an antenna with a directional effect, such as for example, a parabolic antenna. The antenna 80 can be installed in a fixed manner and can be directed towards the central antenna 68. In an alternative mode, the antenna 80 can have a directional effect to be usable. The central antenna 68 is, according to this variant of the invention, an electrically controllable antenna with adjustable directional effect. According to a variant of the invention, antenna 68 is an antenna system. By adjusting the directional antenna 80 and 68, respectively, so that these, at least during the precise time intervals, are directed towards each other, multiple access per division of SDMA space is achieved. In this way, various different local transceivers 200A, 200B, 200C can operate side by side on the same carrier frequency without interfering with each other. The multiple access by space division can, according to the invention, be combined with each of the frequency, time and code multiplexing techniques described above, respectively.

Claims (1)

1. CLAIMS The method for interleaving signals between a public telecommunication network and at least one first communication arrangement through a communication system, by means of which the communication system comprises: a network adapter unit comprising a first signal input which is connectable with the public telecommunication network and a second signal input; and at least one subscriber adapter unit comprising a first signal input for wirelessly exchanging the signals with the second signal input, and at least one fourth signal input that is connectable to the communication array; the method comprises the steps of: establishing a communication channel in response to a communication signal; transferring the signal between the first signal input and the fourth signal input through the communication channel during a transparent signaling phase; receive, at the first signal input, a disconnection signal coming from the public network of telecommunication; produce the termination of the message in the network adapter unit as a consequence of the disconnection signal; send the termination message to the subscriber adapter unit; send a disconnect signal at the fourth input of the signal in response to the termination message; and disconnecting the traffic channel after the reception of the disconnection signal. The method, according to claim 1, further comprises the step of: sending a confirmation message from the subscriber adapter unit to the network adapter unit after receipt of the termination message. The method, according to claim 1 or 2, wherein the traffic channel is disconnected in response to receiving the disconnect signal. The method, according to claim 1, 2 or 3, wherein the traffic channel is disconnected in response to receiving the disconnect signal, as well as the confirmation message. The method, according to claim 1, 2, 3 or, wherein the disconnect signal occurs in the public network of telecommunication as a consequence of a disconnection signal that is produced by, or as a consequence of, the first communication arrangement. The method according to claim 1, 2, 3 or 4, wherein the disconnect signal occurs in the public telecommunication network as a consequence of a disconnection signal that is produced by, or as a consequence of, the second telecommunication arrangement. communication. The method according to any of the preceding claims further comprises the step of: establishing whether the fourth signal input receives a busy signal or a disconnect signal from a communication array after receipt of the termination message. The method, according to claim 6 further comprises the step of: retransmitting the established answer signal towards the first signal input. The method according to claim 8 further comprises the step of: maintaining the busy signal at the first signal input, after disconnecting the traffic channel, when the set answer signal is set. find in a busy signal. The method according to claim 9 further comprises the step of: transmitting a disconnect message from the subscriber's adapter unit to the network adapter unit in response to a disconnect signal that is produced by, or as a consequence of, , the first communication arrangement after disconnecting the traffic channel; change the busy signal at the first signal input to a disconnect signal in response to receiving the disconnect message. The method, according to claim 8, further comprises the step of: maintaining the busy signal at the first signal input and maintaining the traffic channel, when the established answer signal is a busy signal, until a signal Disconnection is received at the fourth signal input. The method, according to claim 1-11, wherein the connection signal is a busy signal that is produced by, or as a consequence of, the first communication array. The method, according to claim 12, wherein the communication section is initiated regardless of whether a dialing character is entered through the communication arrangement. The method according to claim 1-11, wherein the connection signal is a call signal or a polarity reversal signal, which signal is supplied to the network adapter unit from the public telecommunication network. The method, according to claim 1-14, wherein the duration of the establishing phase of the channel is shorter than a first period of time, wherein the first period of time is 15 seconds. The method, according to claims 1-14, wherein the duration of the setter phase of the channel is shorter than a first period of time, wherein the first time period is 1 second. The method, according to claims 1-16, further comprises the steps of: transferring in-band signals, which have a frequency within a predetermined frequency range, in a transparent manner between the first signal input and the fourth signal input through the traffic channel. The method, according to any of claims 1-16, further comprises the steps of: transferring the signals; out of band, which they have a frequency outside a predetermined frequency range, in a coded form, between the first signal input and the fourth signal input through the traffic channel. The method according to any of claims 1-18, wherein the channel connection phase comprises the steps of: sending a call between the second signal input and the third signal input through an access channel; look for a communication channel available; assign a communication channel when it is available; instructing the subscriber adapter unit to transfer over the exchange of signals to the assigned communication channel; request the subscriber adapter unit to provide an identity code; providing an identity code from the subscriber adapter unit through the communication channel assigned to the network adapter unit; establish a connection between the adapter unit of the network and the public telecommunication network. The method, according to any of the claims 1-19, comprises the steps of: receiving in the first signal input a status signal coming from the public telecommunication network after the channel setting phase; send the status signal to the first communication arrangement through the communication system; receiving, in the fourth signal input, a tagging sequence from the communication array; send the dialing sequence to the public telecommunication network. The method of claim 20 comprises the steps of: interpreting, in a central of the public telecommunication network, a part of the signal introduced as a receiving code; determining, as a consequence of the identity of the calling communication arrangement, a memory location in a memory medium of the public telecommunication network; store the receiver code in the given memory location. The method according to any of claims 1-19 comprises the steps of: receiving, at the first signal input, a tone of dial from the public telecommunication network; send the dial tone to the first communication arrangement through the communication system; determining, as a consequence of the identity of the calling communication arrangement, a memory location in a memory medium in the public telecommunication network; read a receiver code from the position determined in memory; establish a connection between the first communication arrangement and a second communication arrangement determined by the receiving code. The method, according to claims 1-22, wherein the method comprises the steps of: receiving a signal in the fourth signal input or in the first signal input; produce a message as a consequence of the received signal; convert the message into a digital message signal; produce a digital sequence signal; producing a coded message signal as a consequence of the signal of the digital message and the signal of the digital sequence; send the encoded message signal through the communication channel; 4'J The method, according to any of the preceding claims, wherein the communication channel is a radio channel. The method, according to claim 24, comprises the step of: directing the transmit signal in a precise direction when a message is transmitted in the radio channel. A communication system for connecting the signal between the public telecommunication network and at least one first communication arrangement, wherein the communication system comprises: a network adapter unit comprising a first signal input that is connectable to the public telecommunication network and a second signal input; and at least one subscriber adapter unit comprising a third signal input for wireless exchange of the signals with the second signal input, and a fourth signal input that is connectable to the communication array; wherein the subscriber adapter unit comprises a local initiating means which is arranged to initiate a communication session in response to a connection signal, and wherein the network adapter unit comprises a first signaling means which is arranged to establish a communication channel during a phase that is a channel driver; the subscriber adapter unit comprises a second signaling means which is arranged to communicate with the first signaling means through the communication channel during a transparent signaling phase; and wherein the network adapter unit is arranged to produce a terminating message on the network adapter unit in response to the reception, at the first signal input, of a disconnect signal from the public network of the network. telecommunication, the first signaling means is arranged to send the termination message to the subscriber adapter unit; the subscriber adapter unit is arranged to send a disconnect signal at the fourth signal input in response to the termination message; and the first signaling means is arranged to disconnect the communication channel after reception of the disconnect signal. A communication system for the connection of the signal between a public telecommunication network and by at least a first communication arrangement, wherein the communication system comprises: a network adapter unit comprising a first signal input that is connectable to the public telecommunication network and to a second signal input; and at least one subscriber unit comprising a third signal input for wireless exchange of the signal with the second signal input, and a fourth signal input that is connectable with the communication array; wherein the network adapter unit comprises: a central initiating means which is arranged to initiate a communication session as a result of a connection signal during a channel establishment phase; and a first signaling means that is arranged to establish a communication channel during the channel setting phase; and wherein the subscriber adapter unit comprises a second signaling means that is arranged to communicate with the first signaling means through the communication channel during a transparent signaling phase; and wherein the network adapter unit is arranged to produce a termination message in the adapter unit of the network in response to the reception, at the first signal input, of a disconnection signal from the public telecommunication network; the first signaling means is arranged to send the termination message to the subscriber adapter unit; the subscriber adapter unit is arranged to send a disconnect signal at the fourth signal input in response to the termination message; and the first signaling means is arranged to disconnect the communication channel after reception of the disconnect signal. The communication system, according to claim 26 or 27, wherein the subscriber adapter unit is arranged to send a confirmation message to the network adapter unit after receipt of the termination message. The communication system, according to claim 26, 27 or 28, wherein: the network adapter unit is arranged to disconnect the traffic channel in response to reception of the disconnect signal. The communication system, according to claim 26, 27 or 23, wherein: the network adapter unit is arranged to disconnect the traffic channel in response to the reception of the disconnection signal and the confirmation message.