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Claims  |
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What is claimed is:
1. Terminal equipment comprising:
a frame part which comprises a DSL block for removing the format of an
xDSL-formatted signal received by the terminal equipment; and
a part disconnectable from the frame part and comprising a memory for
storing information in the deformatted signal,
the DSL block being arranged to generate an xDSL signal and to transmit the
generated xDSL signal outside the terminal equipment,
the frame part further comprising a generator arranged to transmit a signal
to the disconnectable part, the disconnectable part further comprising a
detector arranged to detect on the basis of the signal transmitted by the
generator that a first transceiver is free to establish a connection to a
second transceiver.
2. Terminal equipment comprising:
a frame part which comprises a DSL block for removing the format of an
xDSL-formatted signal received by the terminal equipment; and
a part disconnectable from the frame part and comprising a memory for
storing information in the deformatted signal,
the DSL block being arranged to generate an xDSL signal and to transmit the
generated xDSL signal outside the terminal equipment,
the frame part further comprising a generator arranged to transmit a signal
to the disconnectable part, the disconnectable part further comprising a
detector arranged to detect on the basis of the signal transmitted by the
generator that a first transceiver has an ongoing connection.
3. Terminal equipment comprising:
a frame part which comprises a transceiver for receiving an xDSL-formatted
signal from an air path and for transmitting an xDSL signal to the air
path; and
a part disconnectable from the frame part and comprising a DSL block for
generating a signal in xDSL format and for removing the format of an
xDSL-formatted signal received from the air path.
the disconnectable part further comprising a transceiver for receiving an
xDSL-formatted signal from the air path and for transmitting an xDSL
signal to the air path,
the frame part further comprising a generator arranged to transmit a signal
to the disconnectable part, the disconnectable part further comprising a
detector arranged to detect on the basis of the signal transmitted by the
generator that a first transceiver is free to establish a connection to a
second transceiver.
4. Terminal equipment comprising:
a frame part which comprises a transceiver for receiving an xDSL-formatted
signal from an air path and for transmitting an xDSL signal to the air
path; and
a part disconnectable from the frame part and comprising a DSL block for
generating a signal in xDSL format and for removing the format of an
xDSL-formatted signal received from the air path,
the disconnectable part further comprising a transceiver for receiving an
xDSL-formatted signal from the air path and for transmitting an xDSL
signal to the air path,
the frame part further comprising a generator arranged to transmit a signal
to the disconnectable part, the disconnectable part further comprising a
detector arranged to detect on the basis of the signal transmitted by the
generator that a first transceiver has an ongoing connection.
5. A data transmission system, comprising:
a first transceiver comprising a DSL block and a generator, the DSL block
arranged to receive an xDSL signal and to remove the xDSL format, the
generator arranged to transmit a signal to an air path;
a second transceiver comprising a detector and a memory, the detector
arranged to detect the signal transmitted by the generator, the memory
arranged to store the xDSL signal deformatted by the DSL block, the second
transceiver being arranged on the basis of the signal received by the
detector to detect the readiness of the first transceiver to start
establishing a connection to said second transceiver; and
a cable connected to the first transceiver, the cable arranged to connect
the first transceiver to the data transmission system,
the first and second transceiver further comprising a connection means for
connecting the first and second transceiver to each other and for
disconnecting the first and second transceiver from each other,
the second transceiver being arranged to transmit information to the DSL
block of the first transceiver, the block being arranged to generate an
xDSL signal into which the information transmitted by the second
transceiver is inputted, and
the first transceiver being arranged to transmit, via said cable, the
generated xDSL signal to the data transmission system.
6. A data transmission system, comprising:
a first transceiver comprising a generator arranged to transmit a signal to
an air path; and
a second transceiver comprising a detector arranged to detect the signal
transmitted by the generator, the second transceiver being arranged on the
basis of the signal received by the detector to detect the readiness of
the first transceiver to start establishing a connection to the second
transceiver,
the first transceiver being arranged to receive a broadband xDSL signal, to
modulate a carrier with the received xDSL signal, and to transmit the
modulated carrier over the air path to the second transceiver, and
the second transceiver being arranged to receive the carrier transmitted by
the first transceiver and to demodulate the xDSL signal modulated into the
carrier, the second transceiver comprising a DSL block arranged to remove
the xDSL format of the demodulated xDSL signal.
7. A data transmission system, comprising:
a first transceiver comprising a generator arranged to transmit a signal to
an air path;
a second transceiver comprising a detector arranged to detect the signal
transmitted by the generator, the second transceiver being arranged on the
basis of the signal received by the detector to detect the readiness of
the first transceiver to start establishing a connection to said second
transceiver;
a server; and
a third transceiver arranged to receive a signal from the server and to
generate an xDSL signal into which the signal received from the server is
inputted,
the third transceiver being arranged to transmit the xDSL signal to the
first transceiver,
the first and the second transceiver each comprising connection means to
galvanically connect the first and the second transceiver to each other,
the first transceiver being arranged to transmit to the second transceiver
the signal received from the third transceiver, either in the xDSL format
or with the xDSL format removed, over the air path or through the
connection means,
the second transceiver being arranged to transmit to the first transceiver
the signal, either in the xDSL format or with the xDSL format removed,
over the air path or through the connection means,
the first transceiver being arranged to generate an xDSL format and to
transform the signal received from the second transceiver into the xDSL
format, if the signal coming from the second transceiver is transmitted
without said format, and
the first transceiver being arranged to transmit the xDSL-format signal to
the third transceiver, the third transceiver being arranged to remove the
format of the received xDSL-format signal and to transmit the signal
inside the format to the server.
8. A data transmission system as claimed in claim 6, wherein the second
transceiver is arranged to establish several simultaneous xDSL connections
to be transmitted over the air path to the first transceiver.
9. A data transmission system as claimed in claim 7, wherein the second
transceiver is arranged to establish several simultaneous xDSL connections
to be transmitted over the air path to the first transceiver.
10. Terminal equipment as claimed in claim 1, wherein the disconnectable
part comprises a display for displaying the information in the xDSL
signal.
11. Terminal equipment as claimed in claim 3, wherein the disconnectable
part comprises a memory for storing the information in the xDSL signal.
12. Terminal equipment as claimed in 2, wherein the terminal equipment
comprises a block arranged for receiving and transmitting a voice signal.
13. Terminal equipment as claimed in 4, wherein the terminal equipment
comprises a block arranged for establishing a mobile telephone connection.
14. A data transmission system as claimed in claim 6, further comprising an
individual pair cable for the first transceiver, the cable being arranged
to connect the first transceiver to the data transmission system.
15. A data transmission system as claimed in claim 5, wherein the second
transceiver is arranged to establish several simultaneous xDSL connections
to be transmitted over the air path to the first transceiver.
16. A data transmission system as claimed in claim 5, wherein the first
transceiver is arranged to transmit to the second transceiver a signal
which comprises the telephone number and/or network address of the first
transceiver.
17. A data transmission system as claimed in claim 5, further comprising a
switched telephone network, mobile network and packet-switched data
transmission network, to each of which the second transceiver is arranged
to establish a connection. |
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Claims |
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Description |
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FIELD OF THE INVENTION
The invention relates to a data transmission method used in a data
transmission system comprising a first transceiver and a second
transceiver.
BACKGROUND OF THE INVENTION
Conventional data transmission systems and telephone systems, such as land
line telephone systems, radio telephone systems and mobile telephone
systems, become faster in their data transmission properties all the time.
Different systems and devices which enable for instance the introduction
of new services become available at quite a fast rate. The introduction of
services is, however, slowed down by the fact that the data transmission
rate between a service provider and user is relatively slow. In addition,
at least some systems require complex control and base station equipment
to function, and their construction is economically a very expensive
investment.
Data transmission can be relatively fast in one section of the system, but
it can be said that the data transfer rate between a base station and
terminal equipment, for instance, is still relatively low. It can also be
noted that it is today not yet possible to transfer quickly enough as much
data to the terminal equipment as required to provide the user as
extensively as possible with different services which function
sufficiently quickly from the user's point of view.
Publication U.S. Pat. No. 5,613,190, for instance, discloses a system which
is made up of service providers, a broadband data transmission link, a
distribution point in the customer's premises and user terminals. The data
to be transmitted is broadband information from the service provider to
the customer. Signal distribution at subscriber end takes place through an
air interface between a transponder and a second transponder in the
terminal. The terminals are assumed to be fixedly installed. In the
premises of the subscriber to the service, there is a transponder which
transforms received broadband information to an RF signal to be
transmitted to the air interface. The transponder can be connected to a
broadband network employing ADSL technology, for instance, in which case
the RF air interface is between two complete ADSL modems. The ADSL
technology used in the publication provides a transfer rate of 1.5 Mbit/s
in the downlink direction.
Publication U.S. Pat. 6,021,158 discloses a data transmission system which
comprises a micro wave link connected to a broadband network, through
which bi-directional broadband data is transmitted by the
point-to-multipoint principle to points from which it is distributed by
twisted-pair copper cables to the customers. The data transmission system
comprises DSL modems. The publication relates to the selection and
allocation of the frequency band for the wireless section on the basis of
the channel capacity and signal quality.
Publication WO 00/04475 discloses a method of processing e-commerce data,
and publication WO 00/04476 discloses an e-commerce telephone. DSL
technology can be utilized in the solutions disclosed in the publications.
BRIEF DESCRIPTION OF THE INVENTION
It is thus an object of the invention to implement a method and a system
and terminal equipment implementing the method so as to reduce the
above-mentioned problems to provide subscribers with versatile services
quickly and efficiently. This is achieved by a method of the type
described in the preamble, which is characterized by receiving a broadband
xDSL signal with a first transceiver, modulating a carrier with the
received xDSL signal, transmitting the modulated signal over the air path
from the first transceiver to a second transceiver, and demodulating the
modulated signal again into an xDSL signal after reception.
The object of the invention is also achieved by a method of the type
described in the preamble, which is characterized by receiving a broadband
xDSL signal with a first transceiver, removing the xDSL format of the
signal in the first transceiver, modulating a carrier with the resulting
signal in the first transceiver, and transmitting the modulated signal
over the air path to a second transceiver.
Further, the object of the invention is achieved by a method of the type
described in the preamble, which is characterized by receiving a broadband
xDSL signal with a first transceiver, removing the xDSL format of the
signal in the first transceiver, and transmitting the resulting signal
either over the air path or by cable from the first transceiver to a
second transceiver which can be disconnected from the first transceiver.
The invention also relates to terminal equipment.
The terminal equipment of the invention is characterized in that the
terminal equipment comprises a frame part which comprises a DSL block for
removing the xDSL format of an xDSL-format signal received by the terminal
equipment, a part which can be disconnected from the frame part and
comprises a memory for storing the information in the deformatted signal,
the DSL block being arranged to generate an xDSL signal and to transfer
the generated xDSL signal outside the terminal equipment.
In addition, the terminal equipment of the invention is characterized in
that the terminal equipment comprises a DSL block for generating a signal
in xDSL format, a transceiver which is arranged to modulate a carrier with
the xDSL-format signal, to transmit the modulated carrier to the air path
and to receive and demodulate a modulated carrier, and the DSL block is
arranged to remove the format the demodulated xDSL signal.
Further, the terminal equipment of the invention is characterized in that
the terminal equipment comprises a frame part which comprises a
transceiver for receiving an xDSL-format signal from the air path and for
transmitting an xDSL signal to the air path, and a part which can be
disconnected from the frame part and which comprises a DSL block for
generating a signal in xDSL format and for removing the format of an xDSL
signal received from the air path, the part also comprising a transceiver
for receiving an xDSL-format signal from the air path and for transmitting
an xDSL signal to the air path.
The invention also relates to a data transmission system which comprises a
first transceiver and a second transceiver.
The system of the invention is characterized in that the first transceiver
comprises a DSL block which is arranged to receive an xDSL signal and to
remove the xDSL format, the first and second transceiver comprise a
connection means to connect the first and the second transceiver to each
other and to disconnect them from each other, the second transceiver
comprises a memory which is arranged to store the xDSL signal whose format
has been removed by the DSL block, and the second transceiver is arranged
to transfer information to the xDSL block of the first transceiver, which
is arranged to generate an xDSL signal, to which the xDSL block is
arranged to input the information coming from the second transceiver, the
data transmission system comprises a cable coupled to the first
transceiver for connecting the first transceiver to the data transmission
system, and the first transceiver is arranged to transmit the xDSL signal
it has generated to the data transmission system by said cable.
In addition, the system of the invention is characterized in that the first
transceiver comprises a transceiver which is arranged to receive a
broadband xDSL signal, to modulate a carrier with the received xDSL
signal, and to transmit the modulated carrier over the air path to the
second transceiver, the second transceiver comprises a transceiver which
is arranged to receive the carrier transmitted by the first transceiver
and to demodulate the xDSL signal modulated into the carrier, and the
second transceiver comprises a DSL block which is arranged to remove the
xDSL format of the demodulated xDSL signal.
Further, the system of the invention is characterized in that the data
transmission system comprises a server and a transceiver which is arranged
to receive a signal from the server and to generate an xDSL signal, to
which the transceiver is arranged to input the signal received from the
server, the transceiver is arranged to transmit the xDSL signal to the
first transceiver, both the first and the second transceiver comprise
their individual connection means for galvanically connecting the first
and the second transceiver to each other, the first transceiver is
arranged to transmit the signal received from the transceiver either in
the xDSL format or without the xDSL format the air path or through the
connection means to the second transceiver, the second transceiver is
arranged to transmit the signal to the first transceiver either in the
xDSL format or without the xDSL format over the air path or through the
connection means, the first transceiver is arrange to form the xDSL format
and to input the signal received from the second transceiver into the xDSL
format, if the signal received from the second transceiver was transmitted
without said format, the first transceiver is arranged to transmit the
xDSL-format signal to the transceiver which is arranged to remove the
format of the received xDSL-format signal and to transmit the signal
inside the format to the server.
Preferred embodiments of the invention are disclosed in the dependent
claims.
The invention is based on transmitting over the air path an xDSL signal or
a signal whose xDSL format has been removed, whereby the data transmission
rate to portable terminal equipment, for instance, can be made high. In
addition, the invention is based on forming a cellular network, in which
base stations are implemented by transceivers which are coupled with
telephone plug boxes and to which a connection is established by an xDSL
signal which is transmitted to the terminal equipment either by cable or
over the air path.
The method, system and terminal equipment of the invention provide several
advantages. The invention makes possible a new kind of connection having a
very fast data transmission rate from portable terminal equipment to the
service provider, for instance. Conventional telephone lines are used in
the data transmission. The terminal equipment of the invention can be a
portable telephone, for instance, which is able to establish a very fast
connection to the other parts of the system using an xDSL signal. Because
a part of the system, i.e. the land line network, already exists, a
cellular network employing fast data transmission can economically be
implemented by means of the invention.
A transceiver acting as a base station in the system of the invention is
connected to a conventional telephone plug box, in which case it is not
necessary to increase the number of conventional base stations. The
connection used between the terminal equipment and the transceiver acting
as a base station is implemented by an xDSL signal which is transmitted
over the air path, in which case the terminal equipment can be used like a
mobile phone. The terminal equipment can function as a telephone, for
instance, to which an xDSL signal is transmitted by cable or over the air
path, thus allowing a fast transmission and reception of very large
quantities of data from and to the telephone.
Thus, the implementation of the system does not require large investments,
because a large number of telephone lines already exists. Real-time video
signals can, for instance, be received by the terminal equipment. It is
also possible to transmit very large quantities of data at a high data
transmission rate from the terminal equipment to the network. In the
system of the invention, the size of the cells can be made relatively
small, whereby it is easy to find out the position of the terminal
equipment.
BRIEF DESCRIPTION OF THE FIGURES
In the following, the invention will be described by means of the preferred
embodiments and with reference to the attached drawings, in which
FIG. 1 shows one embodiment of the terminal equipment of the invention,
FIG. 2 shows an embodiment of a handset,
FIG. 3 shows an embodiment of an IPP block,
FIG. 4 shows an embodiment of the terminal equipment,
FIG. 5 shows an embodiment of the terminal equipment,
FIG. 6 shows an embodiment of the terminal equipment,
FIG. 7 shows an embodiment of the terminal equipment,
FIG. 8 shows an embodiment of the operating environment of the terminal
equipment,
FIG. 9 shows an embodiment of the operating environment of the terminal
equipment,
FIG. 10 shows in greater detail an embodiment of the operating environment
of the terminal equipment,
FIG. 11a shows a first embodiment of connecting the terminal equipment to a
data transmission network,
FIG. 11b shows a second embodiment of connecting the terminal equipment to
a data transmission network,
FIG. 11c shows a third embodiment of connecting the terminal equipment to a
data transmission network,
FIG. 11d shows a fourth embodiment of connecting the terminal equipment to
a data transmission network,
FIG. 11e shows a fifth embodiment of connecting the terminal equipment to a
data transmission network,
FIG. 12 shows a first embodiment of connecting the terminal equipment to a
plug,
FIG. 13 shows a first embodiment of connecting the terminal equipment 19 to
a plug,
FIG. 14 shows a first embodiment of connecting the terminal equipment 19 to
a plug,
FIG. 15 shows a first structure of the terminal equipment,
FIG. 16 shows a second structure of the terminal equipment,
FIG. 17 shows a third structure of the terminal equipment,
FIG. 18 shows a fourth structure of the terminal equipment,
FIG. 19 shows a fifth structure of the terminal equipment,
FIG. 20 shows an embodiment of a data transmission system comprising
terminal equipment.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a first embodiment of the terminal equipment TE of the
invention. To be more precise, the embodiment shown in FIG. 1 is a fixed
DSL telephone. The terminal equipment is suited for packet-switched data
transmission in particular.
The terminal equipment 19 comprises a frame part 299 and a handset 193. The
handset is connected by a wire 192 to the frame part 299. The frame part
299 of the terminal equipment shown in the figure is connected to cables,
i.e. conductors 18. The terminal equipment comprises a power source 199
which can be a battery, for example. The power source 199 is connected by
a wire 191 outside the frame part, and for example charging current for
the battery can-be supplied over the wire 191 to the power source.
The terminal equipment also comprises a block 194 which comprises a line
transformer 194a and line driver 194b. The terminal equipment also
comprises a block 195 corresponding to the block 194 and comprising a line
transformer 195a and a line driver 195b. Further, the terminal equipment
comprises a DSL block 196, an IPP (Internet Packet Phone) block 197 and a
block 198. The block 198 comprises the electronics required for
implementing a conventional land line telephone.
The DSL block 196 is, in practice, an xDSL model of the subscriber end. The
terminal equipment receives a signal from the conductors 18 and transmits
to the conductors 18 a signal which is in xDSL format. xDSL technology
comprises the following technologies: ADSL (Asymmetric Digital Subscriber
Line), RADSL (Rate Adaptive DSL), SDSL (Symmetrical DSL), HDSL (High bit
rate Digital Subscriber Line) and VDSL (Very high bit rate DSL). Thus, the
DSL block can function as an ADSL modem (ATU-R), HDSL modem (HTU-R or
H2TU-R), VDSL modem (VTU-R) or a voice-frequency modem, for instance.
xDSL technology is especially well-suited for data transmission systems, in
which the need to transfer data in one direction of transfer is
considerably bigger than in the other direction of transfer. Usually, a
user downloads considerably larger quantities of data from the network
than what he or she transmits to the network. Thus, the user is able to
establish connections having very high data transmission rates using
terminal equipment, such as a mobile phone, employing the xDSL technology.
At its fastest, the xDSL technology can achieve a data transmission rate
of several tens of megabits. A typical application is, for instance, to
connect to a server located in a network by means of an xDSL telephone. It
is possible to download data from the server to the telephone at a high
data transmission rate. By means of the telephone, it is also possible to
transmit data to the network at a high data transmission rate.
It is possible to establish for instance a real-time or nearly real-time
image connection by means of the terminal equipment. In addition, a fast
data transmission connection to different multimedia services, video
conferences and other services requiring high-capacity data transfer can
be established by means of the terminal equipment.
FIG. 2 shows in greater detail an embodiment of the handset 193. FIG. 2
shows that the handset 193 comprises an earpiece 193a and a microphone
193b. The presented embodiment also comprises a means 193c which is used
for instance for the selection of numbers, letters and other symbols. The
means 193c comprises keys, for instance.
The embodiment shown in FIG. 2 also comprises a means 193d for transmitting
and receiving a radio signal. The means 193d is arranged to transmit and
receive a signal according to the GSM or CDMA system, for instance. In
practice, the means 193d comprises components according to prior art for
implementing a mobile phone. It is thus possible to contact conventional
mobile phones, for instance, by means of the handset.
Further, the embodiment shown in FIG. 2 comprises a transceiver 183b and an
input/output port 193f, to which a cable 192 is connected. The transceiver
183b is arranged to transmit a signal over the air path to the frame part
299. Signals propagating by the cable 192 from the frame part to the
handset and vice versa are transmitted through the input/output port. The
input/output port 193f is connected through signal paths to each
functional block of the handset.
FIG. 3 shows in greater detail an embodiment of an IPP block 197. The IPP
block 197 comprises a memory circuit 197a, processor 197b, four drivers
197c, identification means 197d, memory circuit 197e, input/output port
197f, display 197g, user interface 197h, and loudspeaker 197i. The memory
circuit 197a is preferably a ROM circuit. The memory circuit 197e is
preferably a RAM circuit. The identification means 197d, display 197g,
user interface 197h, and loudspeaker 197i are each connected to the
processor through their own drivers 197c.
The user interface 197h comprises a touch screen, mouse or push buttons,
for instance. Through the user interface 197h, the user of the terminal
equipment or phone inputs information and for instance commands to the
equipment. The given commands allow the transfer of files, for instance,
to the network and vice versa.
The processor 197b and the IPP block are connected through the input/output
port 197f to a block 196 and 198. The identification means 197d is, in
practice, a card reader which is connected to the processor through the
driver 197c connected to the identification means 197d. The terminal
equipment can read the information stored in the identification means. In
addition, it is possible to store information into the identification
means using the terminal equipment. The terminal equipment has a network
address, fixed telephone number and mobile phone number, which are all
stored in the identification means.
The IPP block 197 functions as terminal equipment for packet traffic and
receives signals from the network. The terminal equipment can also
transmit signals to the network. The user of the terminal equipment uses
the signals to establish a connection to various service providers, for
instance. Through the block 197, the service provider's services on the
server become visible and audible to the user of the terminal equipment.
Service information is displayed on the display 197g and audible through
the loudspeaker 197i.
The information content in the identification means 197d defines, for
instance, which packets the subscriber, i.e. user of the terminal
equipment, is allowed to read or receive. The identification means can
also define a service-specific user interface for the user, in which case
the user interface is loaded through the network either to one memory only
or to both memories 197a, 197e. The user gives commands to the terminal
equipment and to the system through the user interface 197h. For instance,
a telephone number displayed on the display 197g can be activated through
the user interface 197h. In practice, activation means selecting the
number for the block 198. Activating number selection may, however,
require that the terminal equipment is in an appropriate operational mode.
FIG. 4 shows an embodiment of the terminal equipment. To be more specific,
the embodiment is a portable telephone which is able to establish a DSL
connection.
In this embodiment, the terminal equipment comprises a frame part 299 which
comprises a block 194, line transformer 194a, line driver 194b, block 195,
line transformer 195a, line driver 195b, DSL block 196, IPP block 197,
block 198, and power source 199.
In addition to the above-mentioned structural components, the terminal
equipment comprises a handset 193, IPP block 197, and connection means
192b. A part of the connection means 192b is in the frame part 299 of the
terminal equipment and another part is in the IPP block. The connection
means 192b makes it possible to disconnect the IPP block 197 from the
frame part 299 of the terminal equipment. The end of the connection means
192b which is on the frame part side can be implemented with a male
connector, for instance. The end of the connection means 192b on the IPP
block 197 side is then at its simplest implemented with a female
connector.
The embodiment shown in FIG. 4 also comprises an adapting means 121 in the
frame part 299. The adapting means 121 is connected to the connection
means part 192b on the frame part side. In practice, the adapting means
121 is a network interface card or a corresponding means which enables
connecting to a local area network, for instance. The adapting means 121
is located in the terminal equipment in such a manner that the IPP block,
i.e. the docking part, can be used to connect the local area network, for
instance a home network, through a DSL connection to a broadband network.
If a local area network is used, the IPP block 197 connects through the
local area network to other parts of the network. In this case, other
network parts refer for instance to the parts of a telecommunications
network, in which the desired service provider resides.
FIG. 5 shows an embodiment of the terminal equipment. To be more specific,
the embodiment is a portable telephone having a wireless connection. The
presented embodiment comprises a frame part 299 which comprises a block
194, line transformer 194a, line driver 194b, block 195, line transformer
195a, line driver 195b, DSL block 196, block 198, power source 199, and
connection means 192b. The terminal equipment comprises an IPP block 197
and connection means 192b which is a counterpart for the connection means
192b in the frame part. The IPP block 197 can be disconnected from the
frame part 299. If necessary, the IPP block can be docked to the frame
part 299 for instance by pressing the connection means 192b together.
It is possible to load and store information, which has been received to
the frame part in the xDSL format, in the IPP block, when the IPP block is
docked to the frame part. After loading and storing the information, the
IPP block can be disconnected from the frame part, and the user can read
the information stored in the IPP block whenever suitable.
In addition, the terminal equipment comprises in the frame part a
transceiver 183a which is connected to the block 198. The terminal
equipment also comprises a handset part 193g which comprises the actual
handset 193 and a transceiver 183b. The handset 193 and the transceiver
183b are connected to each other. In practice, the transceiver 183a is
connected to an antenna, and a signal transmitted by the antenna is
received by an antenna connected to the transceiver 183b. The antennas
are, however, not shown in the figure.
FIG. 5 shows that the handset part 193g is not connected to the frame part
299 with a cable, for instance, but the connection is wireless. To be more
specific, the transceivers 183a and 183b are connected wirelessly to each
other. The wireless connection can be based on the transmission and
reception of a radio signal or an infra-red signal, for instance. The
transceivers 183a, 183b are arranged to generate and modulate a carrier.
In addition, the transceivers 183a, 183b are arranged to demodulate a
modulated carrier. A wireless connection between the transceivers 183a,
183b makes it possible to locate the frame part 299 and the handset part
193g relatively far away from each other.
The transceivers 183a, 183b transmit to each other a modulated signal which
comprises speech. The speech signal first propagates by a cable 18a to the
line transformer 195a, from which it is transmitted through the line
driver 195b to the block 198. After this, the signal is transmitted to the
transceiver 183a which modulates the speech signal, after which the
modulated signal is transmitted to the transceiver 183b in the handset
193, and the received signal is demodulated. The user of the handset can
hear the sound waves corresponding to the demodulated signal in the
earpiece. In principle, the transmission direction of the handset works in
the same manner as the reception direction.
FIG. 6 shows an embodiment of the terminal equipment. To be more specific,
the embodiment is a wireless phone having a wireless xDSL connection. The
presented embodiment comprises a frame part 299 which comprises a block
194, line transformer 194a, line driver 194b, block 195, line transformer
195a, line driver 195b, block 198, power source 199 and connection means
192b.
In addition, the embodiment shown in FIG. 6 comprises in the frame part a
transceiver 141a which is connected to the line driver 194b and block 198.
The embodiment also comprises a structure 201 which can be disconnected
from the frame part. The structure 201 comprises a part of the connection
means 192b as described earlier. The structure 201 can be disconnected
from the frame part at the connection formed by the connection means 192b.
The structure 201 can also be docked to the frame part.
The structure 201 also comprises a transceiver 141b, DSL block 196, IPP
block 197 and power source 199b which is implemented by an accumulator or
a battery, for instance. The transceiver 141b in the structure 201 is
connected to the DSL block 196 and IPP block. The IPP block is further
connected to the DSL block. The transceivers 141a and 141b have a wireless
connection to each other. In practice, the transceiver 141a is connected
to an antenna, and a signal transmitted by the antenna is received by an
antenna connected to the transceiver 141b.
The wireless connection between the transceivers 141a and 141b can be based
on the transmission and reception of a radio signal or an infra-red
signal, for instance. The wireless connection between said transceivers
141a, 141b makes it possible to locate the frame part 299 and the part 201
relatively far away | | |
