WO1996013948A1 - Fixed subscriber loop radio communications apparatus and system - Google Patents
Fixed subscriber loop radio communications apparatus and system Download PDFInfo
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- WO1996013948A1 WO1996013948A1 PCT/EP1995/004131 EP9504131W WO9613948A1 WO 1996013948 A1 WO1996013948 A1 WO 1996013948A1 EP 9504131 W EP9504131 W EP 9504131W WO 9613948 A1 WO9613948 A1 WO 9613948A1
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- telephone network
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- fixed telephone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/14—WLL [Wireless Local Loop]; RLL [Radio Local Loop]
Definitions
- This invention concerns a radio access communications system for the fixed subscriber loop to provide access for a set of subscriber terminals to a fixed telephone network, this communications system being particularly applicable for those access systems to a fixed telephone network where the structural costs, coverage or topology make it unfeasible to employ wired networks.
- BACKGROUND OF THE INVENTION At present, the use of radio communications systems in the subscriber loop is one of the topics of greatest interest for both the service providers and the manufacturers of equipments developed for this purpose.
- the ternational tandardization and normalization bodies are plaving a major role in the analysis and examination oi the possible technologies to be applied to this field as alternatives to the physical transmission or access networks associated with a fixed telephone network.
- the reference model for this local loop radio communications system makes use of a base station controller device that connects the local loop radio communications system with the fixed telephone network, a set of base stations with radio devices for transmitting and receiving information in the voice band, and signalling from and towards the subscriber terminals and a series of radio terminating elements that permit access to the radio interface of a number of subscriber terminals to which these radio terminating elements are each physically connected.
- the radio access communications system for fixed subscriber terminals to a fixed telephone network presents problems of incompatibility between the two for full integration of this radio access system, acting to all intents as an extension of the fixed telephone network, when this radio access communication system has to interconnect and interoperate with the fixed telephone network.
- CHARACTERISATION QF THE INVENTION This invention describes a radio access communications system for the fixed subscriber loop that provides access for a set of subscriber terminals to a fixed telephone network.
- the base station controller which controls a set of base stations which establish the radio links with the subscriber terminal adapters; this radio access communications system for the fixed subscriber loop being of particular application in those access systems where, for reasons of high cost, coverage requirements or topology, a wired network access system is not feasible.
- an audio communications channel is first set up between a base station controller and the subscriber terminating adapter of the subscriber terminal for which the call is intended, such that the subscriber terminals may be considered bv the fixed telephone network to be wired subscribers, whereby the latter can have access to the same services available on the fixed telephone network as can genuinely wired subscribers.
- the communications channel formed in this way is initially used to send the tone signals associated with call control ( dial tone and ringing acknowledgment tones coming from the fixed telephone network), as well as the dialling signals generated bv the subscriber terminal towards the fixed telephone network.
- the system also comprises means to interpret the call control system of the fixed telephone network and of the status of the subscriber interfaces of the subscriber terminating adapters, as well as means to identify these subscriber terminating adapters in calls made by the subscriber terminals towards the fixed telephone network.
- FIG. 1 shows the radio access communications system in the fixed subscriber loop object of this invention
- FIG. 2 shows the flowchart of the setting up, maintaining and release of an outgomg call from the subscriber termmal, between the base station controller and the subscriber terminating adapter associated with the subscriber terminal, and
- FIG. 3 shows the flowchart tor the case of an incoming call to the subscriber termmal, between the base station controller mentioned and the subscriber terminating adapter associated with the telephone termmal DESCRIPTION OF AN IMPLEMENTATION OF THE INVENTION
- the diagram of figure 1 is a representation of the radio access communications system in the fixed subscriber loop CEB, EB.ATR, object of this invention, which provides access tor a set of subscriber terminals TE to the communications services provided bv a fixed telephone network RTF
- This system comprises a set of subscriber terminating adapters ATR each of which is connected to a subscriber terminal TE, and a base station controller CEB which controls a set of base stations EB for the functions of transmitting and receiving voice band information and signalling messages via radio
- the radio technology employed in the implementation of the commurucations system is that of the European DECT (Digital European Cordless Telecommunications) standard which makes use of a signalling field over which are sent signalling messages and an information field over which is sent information in the voice band with a bandwidth of 4 kHz
- the replacement of the conventional pair of wires in the subscriber loop with a radio link implies the incorporation into the subscriber loop of a new equipment termed a subscriber terminating adapter ATR in the two- wire interface of the subscriber termmal
- This subscriber terminating adapter ATR sets up a radio connection with one of the base stabons EB that are physically linked to the base station controller CEB connected to the terminal point of the fixed network, in which reside the subscriber control functions CAB.
- the subscriber terminating adapter ATR performs, among other functions, that of transmitting and receiving signalling and information in the voice band via radio and adapting these signals to the two-wire subscriber interface in the subscriber terminal TE, thereby ensuring the subscriber controller functions CAB of the terminal point of the fixed network in wired systems.
- the subscriber terminating adapter ATR comprises means for requesting the setting up of the communications link with the base station controller CEB, means for transmitting towards the base station controller CEB both the information on the state of the two-wire subscriber interface and its own signalling, means to support the call control functions of the fixed telephone network RTF since the subscriber terminating adapter ATR has no call control functions of its own. wherebv it works with signals sent bv the base station controller CEB associated with the communications process.
- the subscriber terminating adapters ATR also comprise means for transmitting their identification to the base station controller CEB in calls originated by the subscriber terminal TE towards the fixed telephone network RTF, as well as means to transmit towards the subscriber terminals TE information in the voice band of the tone signals associated with call control of the fixed telephone network RTF for calls originated by the subscriber terminals TE.
- the subscriber terminating adapters ATR comprises means to transmit, in the voice band, towards the fixed telephone network RTF, the dialling signals generated in the subscriber terminals TE.
- This invention of the subscriber terminating adapter ATR envisages the setting up of an audio path that can be enabled or inhibited according to the signalling messages received from the base station controller CEB.
- This base station controller CEB makes possible the set-up and release of communications links with the subscriber terminals TE by means of the corresponding subscriber terminating adapters ATR, performing in turn the control of these functions.
- the base station controller CEB comprises means to transmit towards the subscriber terminals TE, in the voice band, the tone signals associated with the call control of the fixed - 6
- the telephone network RTF comprises means to perform the control of the two-wire subscriber interface of the subscriber terminating adapter ATR, means to support the call control of the fixed telephone network RTF, and means to transmit towards the fixed telephone network RTF, as information in the voice band, the dialling signals originating in the subscriber terminals TE.
- the setting up of a DECT link can be initiated by both the base station controller CEB, in the case of incoming calls, and by the subscriber terminating adapter ATR in the case of outgoing calls, but the release of the communication can only be done by the base station controller CEB involved in the communication process, under the orders of the fixed telephone network RTF.
- FIG. 2 is a flowchart of the setting up of a call made by a subscriber terminal TE towards the fixed telephone network RTF. It starts from an initial idle state 1 in which the subscriber terminal is on-hook. When the subscriber unhooks the handset 2, the system proceeds to a connection set-up state 3, in which the subscriber terminating adapter ATR requests the setting up of a DECT channel, after which it is allocated one ot the channels available to link it with the base station controller CEB via one of the base stations EB.
- the subscriber terminating adapter ATR then sends an identifying message 4 to its associated base station controller CEB via the signalling field of the DECT frame, after which this base station controller CEB performs identity verification 5. Should the identity verification process of the subscriber terminating adapter ATR not result positive, the base station controller CEB passes to the release state 10 of the DECT channel.
- the subscriber terminating adapter ATR informs 6 the base stahon controller CEB, via the signalling field of the DECT frame, that the subscriber handset is off- hook.
- the CEB in question then mdicates this to the subscriber controller
- CAB of the fixed network terminal point is the CAB of the fixed network terminal point.
- the base station controller CEB then effects the transmission 7 of the signalling messages to the subscriber terminating adapter ATR for the enabling of the internal audio path of the subscriber terminatmg adapter ATR, these messages having been generated on indication from the subscriber controller CAB of the fixed telephone network RTF.
- the normal call processes 8 of a telephone terminal take place in a transparent form: sending of the dial tone generated in the fixed telephone network RTF towards the subscriber terminal TE in the information field of the DECT frame, and transmission, as information in the voice band, of the dialling signals produced by the subscriber terminal TE towards the fixed telephone network RTF and of the pilot tone of the fixed telephone network RTF towards the subscriber terminal TE.
- the bandwidth ot the DECT information field is sufficient to permit the transmission of the dialling signals produced by a subscriber terminal TE ot the DTMF type, as well as of the signalling tones employed bv the telephone network itself.
- the subscriber terminal TE hangs up 9
- this is communicated bv the subscriber termmating adapter ATR to the subscriber controller CAB, all of which takes place via the base station EB and the base station controller CEB.
- the subscriber controller CAB then mdicates to the base station controller CEB that it may proceed to release 10 the DECT channel
- Figure 3 shows the flowchart corresponding to the setting up. maintaining and release ot a call commg from the fixed telephone network RTF towards a subscriber terminal TE through the base station controller CEB and the subscriber terminating adapter ATR associated with the subscriber terminal TE for which the call is intended.
- the system starts in an initial state 11 of waiting for an incoming call
- the subscriber controller CAB mdicates 12 this situation to the base station controller CEB, after which the latter starts to set up 13 a DECT channel.
- the subscriber terminating adapter ATR proceeds to indicate 14, via the signalling field, whether the subscriber terminal TE is off-hook or not. If the subscriber termmal TE is busy (off-hook), the system proceeds to the subscriber engaged state 15 in which the base station controller CEB informs the subscriber controller CAB of this situation and the latter informs the base station controller CEB that it may proceed with release 18 of the DECT channel, and the process is concluded.
- the subscriber controller CAB makes an incoming call indication 16 that is sent, in the signalling field of the DECT channel, to the subscriber terminating adapter ATR by means of the corresponding signalling messages so that the latter will generate a ringing current in the subscriber terminal TE.
- the subscriber terminating adapter ATR indicates this event to the subscriber controller CAB by means of the base station controller CEB, which transmits an enabling message for the audio channel 17, via the signalling field, to the subscriber terminating adapter ATR.
- any intervening event produced by the subscriber terminal TE is communicated to the subscriber controller CAB over the DECT system signalling field and this controller takes a decision which is communicated to the base station controller CEB for it to carry out a determined action (channel release, etc.).
- the subscriber controller CAB communicates this to the base station controller CEB, and the svstem progresses to the call release state 18 in which the DECT channel is cleared down.
- an indication is given to the subscriber terminating adapter ATR for it to activate, for a determined time, an end-of-call tone that can be heard in the loudspeaker of the subscriber terminal TE and which is mterrupted when the subscriber hangs up.
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Abstract
Radio access communications system in the fixed subscriber loop (CEB, EB, ATR) providing access for a set of subscriber terminals (TE) to a fixed telephone network (RTF). This communications system establishes an audio channel link, in addition to that for signalling, over which pass, as information in the voice band, the tone signals associated with the call control signals pertaining to the fixed telephone network (RTF) and the dialling signals generated by the subscriber terminals (TE) for calls made by said subscriber terminals (TE) towards said fixed telephone network (RTF). The communications system supports the call control functions corresponding to the fixed telephone network (RTF) and the two-wire subscriber interface control functions of the subscriber terminals (TE).
Description
Fixed Subscriber Loop Radio Communications Apparatus and System
OBJECT OF THE INVENTION
This invention concerns a radio access communications system for the fixed subscriber loop to provide access for a set of subscriber terminals to a fixed telephone network, this communications system being particularly applicable for those access systems to a fixed telephone network where the structural costs, coverage or topology make it unfeasible to employ wired networks. BACKGROUND OF THE INVENTION At present, the use of radio communications systems in the subscriber loop is one of the topics of greatest interest for both the service providers and the manufacturers of equipments developed for this purpose.
The application of wireless technology in the fixed telephone subscriber radio loop in communications systems implies the incorporation oi these systems in the main fixed network or in access networks, it being possible to consider the new architecture as an extension to the previous one, avoiding problems of iiiter or in and compatibihty between the t o.
The ternational tandardization and normalization bodies are plaving a major role in the analysis and examination oi the possible technologies to be applied to this field as alternatives to the physical transmission or access networks associated with a fixed telephone network.
The European Technical Report "ETR on Radio in the Local Loop", of
November 1993, developed by the Technical Committee RES 3 (Cordless Communications) of the ETSI (European Telecommunications Standards Institute), examines the service characteristics required in these systems and describes, among other matters, the studies made on the different radio technologies to be implemented, applications, services supported and examples of developments for these systems within the concept of "Radio in the Local Loop".
On pages 10 to 13 of the document mentioned is to be found the reference model for local loop radio communications systems as access systems for the transmission of information between the terminal point of the fixed telephone network, where the base station controller is located, and the subscriber terminals.
The reference model for this local loop radio communications system referred to in the document mentioned, makes use of a base station controller device that connects the local loop radio communications system with the fixed telephone network, a set of base stations with radio devices for transmitting and receiving information in the voice band, and signalling from and towards the subscriber terminals and a series of radio terminating elements that permit access to the radio interface of a number of subscriber terminals to which these radio terminating elements are each physically connected. On pages 20 to 27 of the document mentioned a description is given of the service characteristics required of a fixed subscriber loop radio communications system whereby it offers a service equivalent to the traditional wired access system for services that do not require a bandwidth greater than about 4 kHz, that is, among others, telephone and low bit rate data transmission services.
To establish communication with a subscriber terminal via a radio access system to a fixed telephone network, what is usually done is to route the call from the fixed telephone network over the radio access network to the radio terminating element associated with the subscriber terminal tor which the call is intended. This radio terminating element then performs the adaptation to the two-wire interface of the subscriber terminal to which it is physically connected; to achieve this, it performs the functions of call tones generation and other functions included in the radio access network for call control, in addition to those already done by the fixed network itself. This procedure frequently causes problems of mterworking between the two networks, since there has to be complete compatibility between both of them.
As a consequence of all the foregoing, the radio access communications system for fixed subscriber terminals to a fixed telephone network, presents problems of incompatibility between the two for full integration of this radio access system, acting to all intents as an extension of the fixed telephone network, when this radio access communication system has to interconnect and interoperate with the fixed telephone network. CHARACTERISATION QF THE INVENTION
This invention describes a radio access communications system for the fixed subscriber loop that provides access for a set of subscriber terminals to a fixed telephone network.
To achieve this, it comprises a set of subscriber terminal adapters, each of which is connected to a subscriber terminal; and a base station controller which controls a set of base stations which establish the radio links with the subscriber terminal adapters; this radio access communications system for the fixed subscriber loop being of particular application in those access systems where, for reasons of high cost, coverage requirements or topology, a wired network access system is not feasible. To achieve this, when a call is made from the fixed telephone network to a subscriber terminal, or vice versa, an audio communications channel is first set up between a base station controller and the subscriber terminating adapter of the subscriber terminal for which the call is intended, such that the subscriber terminals may be considered bv the fixed telephone network to be wired subscribers, whereby the latter can have access to the same services available on the fixed telephone network as can genuinely wired subscribers.
The communications channel formed in this way is initially used to send the tone signals associated with call control ( dial tone and ringing acknowledgment tones coming from the fixed telephone network), as well as the dialling signals generated bv the subscriber terminal towards the fixed telephone network.
The system also comprises means to interpret the call control system of the fixed telephone network and of the status of the subscriber interfaces of the subscriber terminating adapters, as well as means to identify these subscriber terminating adapters in calls made by the subscriber terminals towards the fixed telephone network.
The advantages offered by this communications system are a reduction in complexity and a lower cost of the subscriber terminating adapters, since the latter do not incorporate the call control function pertaining to the access network and, moreover, problems are avoided of incompatibility and interworking between the access network and fixed telephone networks since the former can support the call control functions pertaining to the fixed telephone network and does not need its own call
PCI7EP95/04131
- 4 -
control functions, acting therefore as an extension to the fixed telephone network in question
BRIEF FOOTNOTES TO THE FIGURES
A fuller explanation of the invention can be obtained from the following description of a preferred implementation based on the figures attached, in which
- figure 1 shows the radio access communications system in the fixed subscriber loop object of this invention,
- figure 2 shows the flowchart of the setting up, maintaining and release of an outgomg call from the subscriber termmal, between the base station controller and the subscriber terminating adapter associated with the subscriber terminal, and
- figure 3 shows the flowchart tor the case of an incoming call to the subscriber termmal, between the base station controller mentioned and the subscriber terminating adapter associated with the telephone termmal DESCRIPTION OF AN IMPLEMENTATION OF THE INVENTION
The diagram of figure 1 is a representation of the radio access communications system in the fixed subscriber loop CEB, EB.ATR, object of this invention, which provides access tor a set of subscriber terminals TE to the communications services provided bv a fixed telephone network RTF This system comprises a set of subscriber terminating adapters ATR each of which is connected to a subscriber terminal TE, and a base station controller CEB which controls a set of base stations EB for the functions of transmitting and receiving voice band information and signalling messages via radio
The radio technology employed in the implementation of the commurucations system is that of the European DECT (Digital European Cordless Telecommunications) standard which makes use of a signalling field over which are sent signalling messages and an information field over which is sent information in the voice band with a bandwidth of 4 kHz
The replacement of the conventional pair of wires in the subscriber loop with a radio link implies the incorporation into the subscriber loop of a new equipment termed a subscriber terminating adapter ATR in the two- wire interface of the subscriber termmal This subscriber terminating adapter ATR sets up a radio connection with one of the base stabons EB that
are physically linked to the base station controller CEB connected to the terminal point of the fixed network, in which reside the subscriber control functions CAB.
The subscriber terminating adapter ATR performs, among other functions, that of transmitting and receiving signalling and information in the voice band via radio and adapting these signals to the two-wire subscriber interface in the subscriber terminal TE, thereby ensuring the subscriber controller functions CAB of the terminal point of the fixed network in wired systems. To achieve this, the subscriber terminating adapter ATR comprises means for requesting the setting up of the communications link with the base station controller CEB, means for transmitting towards the base station controller CEB both the information on the state of the two-wire subscriber interface and its own signalling, means to support the call control functions of the fixed telephone network RTF since the subscriber terminating adapter ATR has no call control functions of its own. wherebv it works with signals sent bv the base station controller CEB associated with the communications process.
The subscriber terminating adapters ATR also comprise means for transmitting their identification to the base station controller CEB in calls originated by the subscriber terminal TE towards the fixed telephone network RTF, as well as means to transmit towards the subscriber terminals TE information in the voice band of the tone signals associated with call control of the fixed telephone network RTF for calls originated by the subscriber terminals TE. Likewise, the subscriber terminating adapters ATR comprises means to transmit, in the voice band, towards the fixed telephone network RTF, the dialling signals generated in the subscriber terminals TE.
This invention of the subscriber terminating adapter ATR envisages the setting up of an audio path that can be enabled or inhibited according to the signalling messages received from the base station controller CEB. This base station controller CEB makes possible the set-up and release of communications links with the subscriber terminals TE by means of the corresponding subscriber terminating adapters ATR, performing in turn the control of these functions. To do this, the base station controller CEB comprises means to transmit towards the subscriber terminals TE, in the voice band, the tone signals associated with the call control of the fixed
- 6
telephone network RTF. In addition, it comprises means to perform the control of the two-wire subscriber interface of the subscriber terminating adapter ATR, means to support the call control of the fixed telephone network RTF, and means to transmit towards the fixed telephone network RTF, as information in the voice band, the dialling signals originating in the subscriber terminals TE.
The setting up of a DECT link can be initiated by both the base station controller CEB, in the case of incoming calls, and by the subscriber terminating adapter ATR in the case of outgoing calls, but the release of the communication can only be done by the base station controller CEB involved in the communication process, under the orders of the fixed telephone network RTF.
Figure 2 is a flowchart of the setting up of a call made by a subscriber terminal TE towards the fixed telephone network RTF. It starts from an initial idle state 1 in which the subscriber terminal is on-hook. When the subscriber unhooks the handset 2, the system proceeds to a connection set-up state 3, in which the subscriber terminating adapter ATR requests the setting up of a DECT channel, after which it is allocated one ot the channels available to link it with the base station controller CEB via one of the base stations EB.
The subscriber terminating adapter ATR then sends an identifying message 4 to its associated base station controller CEB via the signalling field of the DECT frame, after which this base station controller CEB performs identity verification 5. Should the identity verification process of the subscriber terminating adapter ATR not result positive, the base station controller CEB passes to the release state 10 of the DECT channel.
Should the identity verification process of the subscriber terminating adapter ATR prove positive, it informs 6 the base stahon controller CEB, via the signalling field of the DECT frame, that the subscriber handset is off- hook. The CEB in question then mdicates this to the subscriber controller
CAB of the fixed network terminal point.
The base station controller CEB then effects the transmission 7 of the signalling messages to the subscriber terminating adapter ATR for the enabling of the internal audio path of the subscriber terminatmg adapter ATR, these messages having been generated on indication from the
subscriber controller CAB of the fixed telephone network RTF.
Once the audio path has been set up between the telephone exchange and the termmal, the normal call processes 8 of a telephone terminal take place in a transparent form: sending of the dial tone generated in the fixed telephone network RTF towards the subscriber terminal TE in the information field of the DECT frame, and transmission, as information in the voice band, of the dialling signals produced by the subscriber terminal TE towards the fixed telephone network RTF and of the pilot tone of the fixed telephone network RTF towards the subscriber terminal TE. The bandwidth ot the DECT information field is sufficient to permit the transmission of the dialling signals produced by a subscriber terminal TE ot the DTMF type, as well as of the signalling tones employed bv the telephone network itself.
When the subscriber terminal TE hangs up 9, this is communicated bv the subscriber termmating adapter ATR to the subscriber controller CAB, all of which takes place via the base station EB and the base station controller CEB. The subscriber controller CAB then mdicates to the base station controller CEB that it may proceed to release 10 the DECT channel
Figure 3 shows the flowchart corresponding to the setting up. maintaining and release ot a call commg from the fixed telephone network RTF towards a subscriber terminal TE through the base station controller CEB and the subscriber terminating adapter ATR associated with the subscriber terminal TE for which the call is intended.
The system starts in an initial state 11 of waiting for an incoming call When this occurs, the subscriber controller CAB mdicates 12 this situation to the base station controller CEB, after which the latter starts to set up 13 a DECT channel. In this situation, the subscriber terminating adapter ATR proceeds to indicate 14, via the signalling field, whether the subscriber terminal TE is off-hook or not. If the subscriber termmal TE is busy (off-hook), the system proceeds to the subscriber engaged state 15 in which the base station controller CEB informs the subscriber controller CAB of this situation and the latter informs the base station controller CEB that it may proceed with release 18 of the DECT channel, and the process is concluded. If the subscriber terminal TE is not off-hook, the subscriber controller
CAB makes an incoming call indication 16 that is sent, in the signalling field of the DECT channel, to the subscriber terminating adapter ATR by means of the corresponding signalling messages so that the latter will generate a ringing current in the subscriber terminal TE. When the subscriber terminal TE goes off-hook, the subscriber terminating adapter ATR indicates this event to the subscriber controller CAB by means of the base station controller CEB, which transmits an enabling message for the audio channel 17, via the signalling field, to the subscriber terminating adapter ATR. Any intervening event produced by the subscriber terminal TE is communicated to the subscriber controller CAB over the DECT system signalling field and this controller takes a decision which is communicated to the base station controller CEB for it to carry out a determined action (channel release, etc.). When the call is over, the subscriber controller CAB communicates this to the base station controller CEB, and the svstem progresses to the call release state 18 in which the DECT channel is cleared down. Prior to this release, and by means of the DECT signalling field, an indication is given to the subscriber terminating adapter ATR for it to activate, for a determined time, an end-of-call tone that can be heard in the loudspeaker of the subscriber terminal TE and which is mterrupted when the subscriber hangs up.
In any of the above situations of outgoing or incoming calls, there are two clearly distinguished states. One in which a DECT channel is set up and/or released in response to events at the subscriber terminal TE and/or of the fixed telephone network RTF; and the other in which once an audio channel has been set up, signalling to and from the telephone network takes place over this channel in a manner transparent to the DECT system, for example, dialling pulses, etc. This permits complete transparency in the access network, in this case based on a DECT system, for the signalling employed by the telephone network, whereby the possibility of incompatibility between the two types of signalling, that of the telephone network with the terminal and that of the access network itself, is reduced.
Claims
1.- COMMUNICATIONS SYSTEM tor radio access in the fixed subscriber loop (CEB, EB, ATR) which provides access for the corresponding subscriber terminals (TE) to a fixed telephone network (RTF) 5 bv means ot the corresponding subscriber terminating adapters (ATR); this communications system being characterised in that it performs the functions of
- control of setting up and release ot commurucations links, via radio, to support the interchange ot signalling and information messages in the
10 v oice band between the fixed telephone network (RTF) and the set of subscriber terminals (TE),
- identification ot the subscriber terminal adapters (ATR) in calls originated bv the subscriber terminals (TE) towards the fixed telephone network (RTF),
15 - interpretation and transcription ot the call control functions of the fixed telephone network (RTF)
- control of the subscriber interfaces of the subscriber terminating adapters (ATR),
- voice band transmission towards the subscriber terminal (TE) ot the 20 tone signals associated with the call control ot the fixed telephone network
(RTF), and
- voice band transmission towards the fixed telephone network (RTF) ot the dialling signals produced by the subscriber terminals (TE)
2.- BASE STATION CONTROLLER (CEB) for use in 25 communications systems (CEB, EB, ATR) according to claim 1, characterised in that it comprises
- means for controlling the setting up and release of communications links with the subscriber terminals (TE) by means of the subscriber terminatmg adapters (ATR),
30 - means for transmitting, towards the subscriber terminatmg adapters (ATR), in the voice band, the tone signals associated with the call control of the fixed telephone network (RTF), means for interpreting the call control functions of the fixed telephone network (RTF) and, from these, produce new commands
35 acceptable in the access network for application to the subscriber terminating adapter (ATR),
- means for controlling the subscriber interface of the subscriber terminating adapters (ATR) by sending signalling messages towards the subscriber terminating adapter (ATR), and - means for transmitting towards the fixed telephone network (RTF), as information in the voice band, the dialling signals generated in the subscriber terminals (TE).
3.- SUBSCRIBER TERMINATING ADAPTER (ATR) for use in communications systems according to claim 1 , characterised in that it comprises:
- means for requesting the setting up of the communications link with the base station controller (CEB),
- means for transmitting its identity to the base station controller (CEB) in calls generated by the subscriber terminal (TE) towards the fixed telephone network (RTF),
- means for interpreting the signalling messages commg from the base station controller (CEB),
- means for informing the base station controller (CEB) oi the state ot the subscriber interface, bv means ot signalling messages, - means for transmitting towards the subscriber terminal (TE), in the voice band, the tone signals associated with the call control of the fixed telephone network (RTF); and
- means for transmitting towards the fixed telephone network (RTF), in the voice band, the dialling signals generated bv the subscriber terminals (TE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU43790/96A AU4379096A (en) | 1994-10-31 | 1995-10-21 | Fixed subscriber loop radio communications apparatus and system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ESP9402256 | 1994-10-31 | ||
| ES9402256 | 1994-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996013948A1 true WO1996013948A1 (en) | 1996-05-09 |
Family
ID=8287861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1995/004131 WO1996013948A1 (en) | 1994-10-31 | 1995-10-21 | Fixed subscriber loop radio communications apparatus and system |
Country Status (3)
| Country | Link |
|---|---|
| AU (2) | AU3428595A (en) |
| WO (1) | WO1996013948A1 (en) |
| ZA (1) | ZA959213B (en) |
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| WO1997013381A1 (en) * | 1995-10-02 | 1997-04-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for providing an improved caller interface in a fixed cellular communications system |
| GB2313016A (en) * | 1996-05-09 | 1997-11-12 | Motorola Israel Ltd | Call set-up in a communication system |
| GB2313017A (en) * | 1996-05-09 | 1997-11-12 | Motorola Israel Ltd | Signalling in a communication system |
| US5703933A (en) * | 1995-05-31 | 1997-12-30 | Telefonaktiebolaget Lm Ericsson (Publ.) | Method and arrangement for establishing a connection in a telecommunications system |
| WO1997050262A2 (en) * | 1996-06-21 | 1997-12-31 | Northern Telecom Limited | System and method for interfacing a standard telephony device to a wireless communication system |
| WO1998027757A2 (en) * | 1996-12-18 | 1998-06-25 | Northern Telecom Limited | Method of passing a pbx station directory number over an air interface |
| WO1998033337A2 (en) * | 1997-01-23 | 1998-07-30 | Northern Telecom Limited | Wireless access system with did and aiod functions |
| WO1998054851A2 (en) * | 1997-05-30 | 1998-12-03 | Nokia Telecommunications Oy | A radio system and a call set-up method |
| WO1999021323A2 (en) * | 1997-10-20 | 1999-04-29 | Wireless Facilities Inc. | Wireless multimedia carrier system |
| US6073028A (en) * | 1997-12-09 | 2000-06-06 | Ericsson Inc. | Method and apparatus for providing out of band dialed digit signaling for a caller interface in a fixed cellular communications system |
| US6373827B1 (en) | 1997-10-20 | 2002-04-16 | Wireless Facilities, Inc. | Wireless multimedia carrier system |
| US7990918B2 (en) | 1997-11-14 | 2011-08-02 | Yoshimi Ltd., Limited Liability Company | Wireless T/E transceiver frame and signaling controller |
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| EP0018941A1 (en) * | 1979-05-07 | 1980-11-12 | Ascom Autophon Ag | Installation for wireless transmission of telephonic communications with a number of radio channels inferior to the number of subscriber stations |
-
1995
- 1995-10-17 AU AU34285/95A patent/AU3428595A/en not_active Abandoned
- 1995-10-21 WO PCT/EP1995/004131 patent/WO1996013948A1/en active Application Filing
- 1995-10-21 AU AU43790/96A patent/AU4379096A/en not_active Abandoned
- 1995-10-30 ZA ZA959213A patent/ZA959213B/en unknown
Patent Citations (1)
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| EP0018941A1 (en) * | 1979-05-07 | 1980-11-12 | Ascom Autophon Ag | Installation for wireless transmission of telephonic communications with a number of radio channels inferior to the number of subscriber stations |
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| G.MANDEL ET AL.: "DAL in analog-zellularer Technik", NACHRICHTENTECHNIK, ELEKTRONIK, ISSN 0323-4657, vol. 42, no. 4, BERLIN, DE, pages 130 - 132, 134 - 135, XP000307185 * |
| J.W.HAGEN: "A VHF RADIO SYSTEM FOR PROVIDING TELEPHONE SUBSCRIBER SERVICE IN DIFFICULT ACCESS RURAL AREAS", 1976 INTERNATIONAL CONFERENCE ON COMMUNICATIONS. COMMUNICATIONS, CORNERSTONE OF FREEDOM, vol. 2, 14 June 1976 (1976-06-14) - 16 June 1976 (1976-06-16), PHILADELPHIA, PH, US, pages 27-27 - 27-32 * |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5703933A (en) * | 1995-05-31 | 1997-12-30 | Telefonaktiebolaget Lm Ericsson (Publ.) | Method and arrangement for establishing a connection in a telecommunications system |
| US5724656A (en) * | 1995-10-02 | 1998-03-03 | Telefonaktiebolaget Lm Ericsson | Method and apparatus for providing an improved caller interface in a fixed cellular communications system |
| WO1997013381A1 (en) * | 1995-10-02 | 1997-04-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for providing an improved caller interface in a fixed cellular communications system |
| AU720085B2 (en) * | 1995-10-02 | 2000-05-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for providing an improved caller interface in a fixed cellular communications system |
| GB2313016B (en) * | 1996-05-09 | 2000-06-28 | Motorola Israel Ltd | An apparatus for and a method of setting up a call in a communication system |
| GB2313016A (en) * | 1996-05-09 | 1997-11-12 | Motorola Israel Ltd | Call set-up in a communication system |
| GB2313017A (en) * | 1996-05-09 | 1997-11-12 | Motorola Israel Ltd | Signalling in a communication system |
| WO1997050262A3 (en) * | 1996-06-21 | 1998-02-19 | Northern Telecom Ltd | System and method for interfacing a standard telephony device to a wireless communication system |
| WO1997050262A2 (en) * | 1996-06-21 | 1997-12-31 | Northern Telecom Limited | System and method for interfacing a standard telephony device to a wireless communication system |
| US5983117A (en) * | 1996-06-21 | 1999-11-09 | Nortel Networks Corporation | System and method for interfacing a standard telephony device to a wireless communication system |
| WO1998027757A3 (en) * | 1996-12-18 | 1998-10-01 | Northern Telecom Ltd | Method of passing a pbx station directory number over an air interface |
| WO1998027757A2 (en) * | 1996-12-18 | 1998-06-25 | Northern Telecom Limited | Method of passing a pbx station directory number over an air interface |
| WO1998033337A2 (en) * | 1997-01-23 | 1998-07-30 | Northern Telecom Limited | Wireless access system with did and aiod functions |
| WO1998033337A3 (en) * | 1997-01-23 | 1998-10-08 | Northern Telecom Ltd | Wireless access system with did and aiod functions |
| US6075985A (en) * | 1997-01-23 | 2000-06-13 | Nortel Networks Corporation | Wireless access system with DID and AIOD functions |
| WO1998054851A3 (en) * | 1997-05-30 | 1999-03-04 | Nokia Telecommunications Oy | A radio system and a call set-up method |
| US6023607A (en) * | 1997-05-30 | 2000-02-08 | Nokia Telecommunication Oy | Radio system and a call setup method |
| WO1998054851A2 (en) * | 1997-05-30 | 1998-12-03 | Nokia Telecommunications Oy | A radio system and a call set-up method |
| AU740082B2 (en) * | 1997-05-30 | 2001-11-01 | Nokia Telecommunications Oy | A radio system and a call set-up method |
| WO1999021323A3 (en) * | 1997-10-20 | 1999-11-25 | Wireless Facilities Inc | Wireless multimedia carrier system |
| WO1999021323A2 (en) * | 1997-10-20 | 1999-04-29 | Wireless Facilities Inc. | Wireless multimedia carrier system |
| US6373827B1 (en) | 1997-10-20 | 2002-04-16 | Wireless Facilities, Inc. | Wireless multimedia carrier system |
| US7990918B2 (en) | 1997-11-14 | 2011-08-02 | Yoshimi Ltd., Limited Liability Company | Wireless T/E transceiver frame and signaling controller |
| US6073028A (en) * | 1997-12-09 | 2000-06-06 | Ericsson Inc. | Method and apparatus for providing out of band dialed digit signaling for a caller interface in a fixed cellular communications system |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA959213B (en) | 1996-05-27 |
| AU3428595A (en) | 1996-05-09 |
| AU4379096A (en) | 1996-05-23 |
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