EP1999936A1

EP1999936A1 - Dect telephone and system for dect telephony

Info

Publication number: EP1999936A1
Application number: EP06805444A
Authority: EP
Inventors: Winrich Hoseit
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-28
Filing date: 2006-10-12
Publication date: 2008-12-10
Also published as: DE112006003718A5; WO2007059722A1

Abstract

The invention relates to a DECT telephone, comprising a base station with a mobile handset. The invention provides for a conventional DECT telephone, comprising a base station and a handset, to have a GSM module integrated in it in addition to the DECT module. If the DECT base station is no longer able to reach the DECT handset, the base station switches to call forwarding to the GSM module located in the handset and vice versa switches call forwarding back again (from) as soon as it is connected to the DECT module again. In the handset, an additionally integrated microcontroller changes over all function keys from the DECT module to the GSM module as soon as the DECT module in the handset is no longer connected to the DECT base station and vice versa changes over the functional elements (keypad, display) back to the DECT module as soon as the latter is connected to the DECT base station again. Preferably, a separate SIM card can be integrated into the GSM module or there is a special receptacle with the necessary contacts for a SIM card. Furthermore, the handset is additionally able to connect to a wireless network and hence capable of IP telephony (VoIP).

Description

DECT telephone and system for DECT telephony

description

The invention relates to a DECT telephone, consisting of a base station with a mobile handset and a system for DECT phones.

DECT stands for Digital Enhanced Cordless Telecommunications (Digital Enhanced Cordless Telecommunications until 1995 Digital European Cordless Telephony). It is an ETSI standard for cordless and mobile phones as well as for wireless data transmission in general. DECT is primarily designed for so-called pico-cellular telephony within buildings in which a range or a cell radius of 30 to 50 meters can be achieved; outdoor transmission distances of 300 meters are possible.

Due to the max. allowed output power of 250 mW can be bridged in conjunction with a directional antenna or repeaters a distance of several kilometers. However, this is technically complex and therefore kaun application. In contrast to mobile radio systems, DECT is a pure access technology and does not describe the network itself.

The Global System for Mobile Communications (GSM) is a standard for fully digital mobile networks, which is mainly used for telephony but also for circuit-switched and packet-switched data transmission and text messages (SMS). GSM was created with the aim of offering a mobile phone system that allows participants mobility throughout Europe. IP telephony (Internet Protocol telephony), also referred to as VoIP (Voice over IP), is understood as telephoning over computer networks that are based on Internet standards. In this case, information typical for telephony, ie voice and control information for, for example, the connection establishment, are transmitted via a uniform network which can also be used for data transmission. Among the participants in the conversation, both computers, telephone terminals specialized for VoIP and conventional telephones connected via special adapters can connect to the conventional telephone network.

In the prior art telephones are known, each of which operates according to one of the standards listed above. Telephones, which can be operated both at home and outside the home, usually work in such a way that two different telephone numbers are assigned to a device, or two devices are necessary, which meet the required communication standard to the distinction between the "house tariff "and the" mobile tariff ". The disadvantage of this solution is the allocation of several telephone numbers, or the need to operate several phones in parallel.

It is therefore an object of the present invention to provide a telephone or a telephone system which enables a telephone connection using a telephone number and a mobile telephone, irrespective of residence in or outside the fixed network area.

For the purposes of the present invention, the following abbreviations and expressions are therefore to be understood as follows:

IP = Internet Protocol

VoiP = Voice over IP

DECT = Digital Enhanced Cordless Telecommunications

GSM = Global System for Mobile Communications PSTN = Public Service Telephone Line

DSL = Digital Subscriber Line

WLAN = Wireless Local Area Network

IC = Internal Controller

PC = personal computer

Hotspot = access point to wireless networks (WLAN)

According to the invention, a GSM module is integrated in a conventional DECT telephone, comprising a base station and a handset. Preferably, a separate SIM card is integrated into the GSM module or there is a special recording with the necessary contacts for a SIM card available. The SIM card is preferably placed only within the handset. The GSM module is a DCS 1800/1900 module.

It is provided in a development of the telephone according to the invention that the handset is suitable for detecting and connecting to wireless networks. This makes it possible to make calls using Voice over IP (VoIP). This feature can be optionally used within the fixed network range or outside the radio range of the DECT base station once connected to a wireless network. The determination of the priorities in the use of parallel connections can either be specified in the handset by the provider, or set by the user or selected depending on the conversation.

Accordingly, a handset designed in this way can be used within the radio range of the DECT base station as a DECT telephone and / or IP telephone and can be used outside the radio range of the base station as a GSM and / or IP telephone. - A -

The base station of a DECT telephone according to the invention is designed such that it automatically makes a call forwarding from a landline number to a mobile or IP phone without radio contact to the handset and when the handset is back within the radio range of the base station, the call forwarding resets automatically.

If the corresponding DECT handset is no longer available for the DECT base station, the base station switches to call forwarding to the GSM module in the handset and vice versa, the call forwarding back again - ie from - as soon as this again has a connection with the DECT module. In the handset, an additional integrated microcontroller switches all function keys from the DECT module to the GSM module as soon as the DECT module in the handset no longer has a connection to the DECT base station and vice versa the functional elements (keyboard, display) back to the DECT module as soon as this again has a connection with the DECT base station.

Display and power supply are available, the keyboard of the handset is depending on the signal strength of the DECT signal (connection to the DECT base station) on either the DECT module laid (if signal strength at least -n-) or on the GSM module placed (if signal strength less -n -).

A sign or symbol on the handset display and / or on the base station indicates the type of connection.

At the same time, the DECT base station switches the landline number to forwarding to the GSM number, as soon as the signal strength is smaller -n-.

The advantage of the invention is, inter alia, that the user has only a single phone in use, namely that belonging to the DECT base station handset. As usual, this phone has a large operator panel. The user can therefore always rely on his usual phone, even if he is outside the landline zone. A separate ("second") mobile phone is therefore unnecessary, especially for older people who are in the filigree NEN operation of a mobile phone can not cope, the usual handset is still available.

If the user is within the fixed network zone, telephone calls are received as usual on his handset. However, if the user is outside the landline zone, the user will continue to receive incoming calls under his usual landline number on the handset, but diverted via GSM. For the subscriber, the terminal always remains the same. Especially for older people, the large keyboard and the usual phone is an advantage.

With regard to the landline used, any carrier (network operator prefix) can be used. Also with regard to the mobile network used, any mobile operator is selectable.

According to the invention, the integration of a software router or a least cost router is provided.

The (software) integration of an LCR makes it possible to market the call volumes together and together. (Provider friendly) A combination tariff for fixed net and portable radio can be offered.

For integration into a wireless network and IP telephony (VoIP), automatic detection and connection of wireless networks (WLAN) according to standard IEEE 802.11a are preferably provided.

The advantage of using VoIP is the possibility of using flatrates, which are very cheap in this form of telecommunications. As a result, even outside the landline zone, as soon as a public hotspot can be received, extremely cost-effective communication is ensured without the need for another telephone.

The present invention further relates to a DECT telephone comprising a base station and a handset, the base station having a universal access modem comprising the following components: an identification unit which is suitable for distinguishing between incoming public telephone signals and high-frequency IP signals

a VoIP module which enables the use of the telephone number assigned to the public telephone signals as a VoIP telephone number,

a DSL splitter / modem which is suitable for the signal transfer of high-frequency signals as digital signals to the WLAN router and for the return of these signals to the Internet,

a DECT module which forwards the incoming public telephone signal or the VoIP signal to the handset and is bidirectional with the DECT module of the fixed position, whether a DECT connection to the handset exists or not,

two WLAN modules which are suitable for connecting at least one WLAN-capable device to the Internet and for producing a permanent connection, in particular meshed radio networks, in parallel with other universal access modules,

a router software module which is suitable for managing the independently established and established meshed radio networks, in particular for controlling the transmission power and reception sensitivity as a function of the bit error rate, and for managing the radio connection of WLAN devices,

and a module for controlling call forwarding, which switches in case of a connection via public telephone signals to a specifiable telephone number a call forwarding in case of a connection via a public telephone call and switches in case of a VoIP connection of a call forwarding via the proxy server

and the handset comprises a handset module having the following components: a DECT module, which is suitable for bidirectional interaction with the DECT module of the universal access module and whose functional assignments of the keys are preferably active as long as there is a DECT connection to the universal access module,

- a GSM module, whose control of the function of keys and display of the

Handset is active, as soon as there is no wireless connection to the DECT module of the universal access module,

- An IC module, which is suitable for monitoring and switching between DECT and GSM module depending on a radio connection to the DECT module of the universal access module.

A further subject of the present invention is a universal system for a DECT telephone, consisting of base station and handset, which consists of a universal access module (10), preferably as part of the DECT base station with the following components:

- An identification unit, which is capable of distinguishing between incoming public telephone signals and high-frequency IP signals

a DSL splitter / modem, which is used for the signal transfer of high-frequency signals as digital signals to the WLAN router and for the return of these

Signals in the internet is suitable

a DECT module which forwards the incoming public telephone signal, or the VoIP signal, to the handset and is bidirectionally suitable with the DECT module for determining whether there is a DECT connection to the handset or not, - two wireless modules, which are suitable enabled ^'device to the Internet and to connect in parallel with other modules Universal access a permanent connection, in particular wireless mesh networks to produce at least a WLAN,

a router software module which is suitable for the management of the independently established and structured meshed radio networks, in particular for the control of the transmission power and reception sensitivity as a function of the bit error rate, as well as for the management of the wireless connection of WLAN devices,

- As well as a module for controlling call forwarding, which switches in case of a connection via public telephone signals to a predetermined telephone number a call forwarding in insufficient connection between the universal access module and handset module and switches in the case of a VoI P connection a call forwarding via the proxy server

and further to a handset module, preferably as part of a DECT handset having the following components:

a DECT module which is suitable for bidirectional interaction with the DECT module of the universal access module and whose function occupancies of the keys are preferably active as long as there is a DECT connection to the universal access module,

- a GSM module, whose control of the function of buttons and display of the handset is active as soon as there is no wireless connection to the DECT module of the universal access module,

- an IC module, which is used for monitoring and switching between

DECT and GSM module is suitable depending on a radio connection to the DECT module of the universal access module. In a further development of the system according to the invention, the functional assignment of the buttons of the handset in DECT and GSM operation is identical.

Further, according to the invention provided in the system for telecommunications that the communication standard used is displayed in the display of the handset.

The present invention enables a telephone line to today's standard, later technically alone as a DSL line is available. The PSTN phone number (CLI) can then be ported as a VoIP phone number, so that you can reach the current PSTN phone number tomorrow over the Internet.

About the universal access modem, it is possible due to the present invention then without technical changes to operate this landline telephony in parallel to the Internet and at the same time as a network node of a meshed radio network to maintain (router software module). Structurally, this can be done in the form of an extension of an existing DECT base station and an existing DECT handset.

The invention will be described by way of example with reference to the universal access system in FIG. 1:

The universal access module (10) is connected via a TAE box (9) by means of a cable to the connection network operator of the system.

Preferably, this is a pure DSL line (13), without that a signal of a telephone landline connection (12) is necessary.

An identification device (11) determines whether the incoming signals are PSTN (public service telephone line) signals or high-frequency IP signals (13).

A DSL splitter / modem (15) integrated in the universal access module (10) modulates / demodulates the high-frequency signals (13) and makes them as digital signals accessible to the wireless router or redirects from there coming back to the Internet.

A further in the universal access module (10) integrated VoIP module (14) allows the PSTN landline number as a VoIP phone number "mitnehmbar" and the voice connections later treated the same (and better) as a PSTN voice connection. manages the IP addresses of the VoIP subscribers.

The DECT module (16) either forwards the PSTN or VoIP signals to the handset and communicates (RF) bidirectionally with the DECT module (51) of the handset. At the same time it constantly checks whether the connection to the handset still exists. If not, the call is forwarded.

If the DECT module (16) in the universal access module (10) of the base station of the DECT phone does not have sufficient radio communication with the DECT module in the handset module of the DECT handset, this module (16) switches to call forwarding:

1. in a PSTN (12) connection to a definable telephone number

2. in a VoIP (13) connection via the proxy server (8).

The two WLAN modules (17) are suitable for connecting one or more WLAN PCs or other working devices via the DSL connection to the Internet, but at the same time capable of maintaining permanent connections with other WLAN modules (17) in other universal access systems and so on own meshed radio network to form.

The router software module (18) manages the independent establishment of the resulting meshed radio network (control of transmission power and reception sensitivity as a function of the bit error rate) as well as the radio connection of pure access devices such as PCs, etc. It therefore fulfills the function of a hotspot The handset module (50) has a DECT module (519, a GSM module (52) and an IC function switch (53).

The DECT module (51) is a completely normal DECT module, whose function keys remain switched on as long as there is a DECT connection to the DECT module (16) in the universal access module (10).

The GSM module (52) is a normal DCS 900/1800 GSM module, whose functional elements (buttons and display) are identical to those of the DECT module (51) but only switched on when the DECT module (51) is no longer connected to the DECT module (16) in the universal access module (10) has.

The IC module (53) is a monitoring and switching module that switches the functional elements to the DECT module (51) in accordance with the presence of a DECT connection between the DECT module (51) in the handset module (50) and the universal access module (10) there is a connection and to the GSM module (52) if this connection is not present.

reference numeral

mobile operators

Proxy Server

TAE can

10 universal access module

11 identification device

12 Signal Public Telephone Line (PSTN)

13 DSL signal

14 VoIP module

15 DSL splitter / router

16 DECT module

17 WLAN module

18 router software module

19 Call Forwarding

50 handset module

51 DECT module

52 GSM module

53 IC module

Claims

claims

1. DECT telephone, consisting of base station and handset, characterized in that in the handset, a GSM module is integrated.

2. DECT telephone according to claim 1, wherein the handset has a receptacle for a SIM card.

3. DECT telephone according to claim 1 or 2, wherein the handset in addition

Module for connection to wireless networks and communication via VoIP has

4. DECT telephone according to one or more of the preceding claims, wherein the handset within the radio range of the DECT base station can be used as a DECT telephone and / or IP telephone and outside the

Radio range of the base station is used as GSM and / or VoIP telephone.

5. DECT telephone according to one or more of the preceding claims, wherein the base station is configured such that it automatically makes a call forwarding from a landline number to a mobile or IP phone without radio contact to the handset and as soon as the handset back within the radio range the base station is the call forwarding resets automatically.

6. DECT telephone, consisting of base station and handset, characterized in that the base station has a universal access modem (10), which has the following components:

a. an identification unit (11) which is suitable for distinguishing between incoming public telephone signals (12) and high-frequency IP signals (13) b. a VoIP module (14), which allows the use of the public telephone signals (12) assigned phone number as VoIP phone number,

c. a DSL splitter / modem (15), which is suitable for the signal transfer of high-frequency signals as digital signals to the WLAN router and for the return of these signals in the Internet,

d. a DECT module (16), which forwards the incoming public telephone signal (12), or the VoIP signal to the handset (50) and bidirectionally with the DECT module (51) suitable for Festetellung, whether a DECT connection to the handset (50 ) or not,

e. two WLAN modules (17) which are suitable for connecting at least one WLAN-capable device to the Internet and for producing a permanent connection, in particular meshed radio networks, in parallel with other universal access modules (10),

f. a router software module (18) which is suitable for managing the independently established and established meshed radio networks, in particular for controlling the transmission power and reception sensitivity as a function of the bit error rate, as well as for managing the wireless connection of WLAN devices,

G. and a module for controlling call forwarding (19), which in case of insufficient radio connection between universal access module (10) and handset module (50) in the case of a connection via public telephone signals (12) to a specifiable telephone number a call forwarding switches and in the case of

VoI P- connects a call forwarding via the proxy server and the handset comprises a handset module (50) having the following components:

H. a DECT module (51), which for bidirectional interaction with the

DECT module (16) of the universal access module (10) is suitable and whose functional assignments of the keys are preferably active as long as there is a DECT connection to the universal access module (10),

i. a GSM module (52) whose control of the function of buttons and display of the handset is active when there is no longer any radio connection to the DECT module (16) of the universal access module (10),

j. an IC module (53), which is suitable for monitoring and switching between DECT (51) and GSM (52) module depending on a radio link to the DECT module (16) of the universal access module (10).

7. DECT telephone, according to one or more of the preceding claims, wherein the handset is independent of the telephone standard used in each case reachable via a telephone number.

8. DECT telephone according to one or more of the preceding claims, wherein a character or symbol in the display of the handset and / or on the base station displays the respective connection type.

9. System for a DECT telephone, consisting of base station and handset, which consists of a universal access module (10), preferably as part of the DECT base station with the following components:

c. a DSL splitter / modem (15), which is suitable for the signal transfer of high-frequency signals as digital signals to the wireless router and for the return of these signals in the Internet,

d. a DECT module (16), which forwards the incoming public telephone signal (12), or the VoIP signal to the handset (50) and is bidirectionally suitable for the detection with the DECT module (51), whether a DECT connection to the handset (50) exists or not,

Switching VolP connection of a call forwarding via the proxy server and further to a handset module (50), preferably as part of a DECT handset comprising:

H. a DECT module (51) which is suitable for bidirectional interaction with the DECT module (16) of the universal access module (10) and whose functional assignments of the keys are preferably active as long as a DECT connection to the universal access module

(10)

i. a GSM module (52) whose control of the function of buttons and display of the handset is active as soon as there is no longer wireless connection to the DECT module (16) of the universal access module (10),

j. an IC module (53), which is suitable for monitoring and switching between DECT (51) and GSM (52) module depending on a radio connection to the DECT module (16) of the universal access module (10).

10. System according to claim 9, wherein the functional assignment of the buttons of the handset in the DECT and GSM operation is identical.

11. System according to claim 9 or 10, wherein the communication standard used is displayed in the display of the handset.