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Claims  |
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What is claimed is:
1. Method for managing a telecommunications call in a telecommunications
network from a caller to an end user, the method comprising the steps of:
receiving the call from the caller, the call including call identification
information;
screening the call based on the caller identification through automated
access to a data base; then
transmitting a first radio signal based on the caller identification
information to a computer having a display screen which computer is
locationally independent of the telecommunications network;
receiving the first radio signal;
presenting a first message identifying the caller and displaying objects on
the display screen, each object representing a function which may be
performed by the user in response to the call;
receiving user selection data representing a selection of one of the
objects by the end user to identify the function to be performed in
response to the call;
transmitting a second radio signal representing a second message
identifying the function to be performed;
processing the second message in response to said second radio signal; and
performing the identified function in the telecommunications network.
2. A method as claimed in claim 1 in which the telecommunications call is a
telephone call.
3. The method as claimed in claim 1 further comprising the step of
providing an input device for inputting data to the computer.
4. The method as claimed in claim 3 wherein the input device is a pointing
device for inputting text data in human readable format to the computer
through the display device and for selecting the objects displayed on the
display screen.
5. The method as claimed in claim 4 further comprising the steps of
converting the text data to a machine readable format and displaying the
converted data on the display screen.
6. The method as claimed in claim 3 wherein the input device is a keyboard.
7. The method as claimed in claim 1 wherein at least one of the first and
second messages is a text message.
8. The method as claimed in claim 1 wherein the second message includes a
telephone number for routing the call to a telephone identified by the
telephone number.
9. The method as claimed in claim 8 wherein the telephone number is a
current wireline telephone number of the end user.
10. The method as claimed in claim 9 wherein the method further includes
the step of storing the current wireline telephone number in a user
profile for later use.
11. The method as claimed in claim 1 wherein the second message includes
rejection instructions for rejecting the call.
12. The method as claimed in claim 1 wherein the second message includes
routing instructions to route the call to a messaging service, such as
voice mail.
13. The method as claimed in claim 1 wherein the second message includes
routing instructions for routing the call to an individual, other than the
end user.
14. The method as claimed in claim 1 wherein the first radio signal which
represents the first message identifies the caller.
15. The method as claimed in claim 1 further comprising the step of
alerting the end user of the reception of the first radio signal.
16. The method as claimed in claim 1 wherein the second message includes a
text message and wherein the method further comprises the step of
converting the text message to a speech message to permit the caller to
hear the speech message.
17. The method as claimed in claim 1 wherein at least one of the objects is
a graphic object.
18. The method as claimed in claim 1 further comprising the step of
identifying the caller from the caller identification information.
19. A system for managing a telecommunications call in a telecommunications
network from a caller to an end user, the system comprising:
means for receiving the call from the caller, the call including caller
identification information;
means for identifying the caller from the caller identification information
and means for screening the call based on the caller identification
information to obtain a first message;
a first transceiver for transmitting to said end user a first radio signal
based on the caller identification information;
a second transceiver at said end user for receiving the first radio signal;
a computer, locationally independent of the telecommunications network,
with a display device connected to the second transceiver and having a
display screen and an input device for inputting data to the computer;
means for presenting the first message identifying the caller and means for
displaying objects on the display screen, each object representing a
function which may be performed in response to the call;
means for receiving user selection data from the input device, the user
selection data representing a selection of one of the objects by the end
user to identify the function to be performed with respect to the call,
the second transceiver transmitting to the first transceiver a second
radio signal representing a second message identifying the function to be
performed; and
means for processing the second message in order to perform, in the
telecommunications network, the function identified by the second message.
20. A method as claimed in claim 19 in which the telecommunications call is
a telephone call.
21. The system as claimed in claim 19 wherein the input device is a
pointing device for inputting text data in human readable format to the
computer through the display device and for selecting the objects
displayed on the display screen.
22. The system as claimed in claim 21 further comprising means for
converting the text data to a machine readable format and means for
displaying the converted data on the display screen.
23. The system as claimed in claim 19 wherein the input device is a
keyboard.
24. The system as claimed in claim 19 wherein at least one of the first and
second messages is a text message.
25. The system s claimed in claim 19 wherein the second message includes a
telephone number and routing instructions for routing the call to a
telephone identified by the telephone number.
26. The system as claimed in claim 19 wherein the second message includes
rejection instructions for rejecting the call.
27. The system as claimed in claim 19 wherein the second message includes
routing instructions for routing the call to a messaging service, such as
voice mail.
28. The system as claimed in claim 19 wherein the second message includes
routing instructions for routing the call to an individual, other than the
end user.
29. The system as claimed in claim 19 wherein the second message includes a
text message and wherein the system further comprises means for converting
the text message to a speech message so that the caller can hear the
speech message.
30. The system as claimed in claim 19 wherein the means for identifying
includes a data base of information records denoting the names of
potential callers.
31. The system as claimed in claim 19 further comprising means for alerting
the end user that the first radio signal has been received by the second
transceiver.
32. The system as claimed in claim 19 wherein at least one of the objects
is a graphic object.
33. A method for managing a telecommunications call from a caller to an end
user, the method comprising the steps of:
receiving the call from the caller, the call including caller
identification information;
transmitting a first radio signal based on the caller identification
information to a computer having a display screen;
receiving the first radio signal;
presenting a first message identifying the caller and displaying objects on
the display screen, each object representing a function which may be
performed by the user in response to the call;
selecting one of the objects by the end user to identify the function to be
performed in response to the call;
transmitting a second radio signal representing a second message
identifying the selected function to be performed, wherein the second
message includes a telephone number for routing the call to a telephone
identified by the telephone number and the telephone number is the current
wireline number of the end user; and
processing the second message in response to said second radio signal to
perform the selected function.
34. The method as claimed in claim 33 wherein the method further includes
the step of storing the current wireline telephone number in a user
profile for later user.
35. A system for managing a telecommunications call from a caller to an end
user, the method comprising:
means for receiving the call from the caller, the call including caller
identification information;
means for identifying the caller from the caller identification information
and means for screening the call, based on the caller identification
information to obtain a first message;
a first transceiver for transmitting to said end user a first radio signal
based on the first message;
a second transceiver at said end user for receiving the first radio signal;
a computer with a display device connected to the second transceiver and an
input device for inputting data to the computer;
means for presenting the first message identifying the caller and for
displaying functions which may be performed in response to the call;
means for receiving end user selection data from the input device, the end
user selection data representing a selection of the functions to be
performed with respect to the call, the second transceiver transmitting to
the first transceiver a second radio signal representing a second message
identifying the function to be performed; and
means for processing the second message to perform the selected function
identified.
36. The system as claimed in claim 35 in which the telecommunications call
is a telephone call.
37. The system as claimed in claim 35 wherein the second message includes a
text message and wherein the system further comprises means for converting
the text message to an audible message.
38. A system for managing a telecommunications call from a caller to an end
user, the system comprising:
means for receiving the call from the caller, the call including caller
identification information;
means for creating a first message to identify the caller in response to
the caller identification information;
a first transceiver for transmitting to said end user a first radio signal
based on the first message;
a second transceiver at said end user for receiving the first radio signal;
a computer with a display device connected to the second transceiver and an
input device for inputting data to the computer;
means for presenting the first message and for displaying objects on the
display screen, each object representing a function which may be performed
in response to the call;
means for receiving user selection data from the input device, the user
selection data representing a selection of the function to be performed
with respect to the call, the second transceiver transmitting to the first
transceiver a second radio signal representing a second message
identifying the function to be performed, wherein the second message
includes a telephone number and routing instructions for routing the call
to a telephone identified by the telephone number.
means for processing the second message to perform the selected function.
39. The system as claimed in claim 38 wherein the telecommunication call is
a telephone call.
40. The system as claimed in claim 38 wherein the second message includes
routing instructions for routing the call to an individual other than the
end user. |
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Claims  |
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Description  |
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TECHNICAL FIELD
This invention relates to method and system for managing telecommunications
and, in particular, to a method and system for managing telephone calls
utilizing two-way wireless or wireline messaging.
BACKGROUND ART
The substantial increase in the use of pagers, car phones, cordless
telephones, and other wireless personal communication devices testifies to
the fact that mobile communications is perceived by many to be an
essential element of life in the 1990's. However, even with these devices,
many people are still effectively out of reach because callers do not know
which of their many numbers to call.
Communications service providers have proposed a personal number calling or
PNC solution to this problem: a personal phone with a single number. The
interworking between the plethora of wireline and wireless networks that
is required to allow all people to be reached regardless of their location
will take a number of years to accomplish.
In the short-term (i.e., the next one to five years), a number of interim
solutions to this personal mobility problem are anticipated that will use
adjunct processors and the existing wireline and wireless communications
infrastructure to achieve the desired end-user functionality. In the
longer term, some of these features will be incorporated into the public
switched network through the Advanced Intelligent Network (AIN), and into
PBXs and other switches through software additions.
The issue of obtaining a physical connection between caller and called
party is not the only problem that must be addressed. Informal research on
user attitudes about personal communications has revealed that the idea of
being accessible 24 hours a day, 7 days a week to anyone that knows your
personal number is an anathema to even the most enthusiastic embracers of
new technology. The problem: answering the phone can be a waste of time
and even annoying when you are interrupted from something more important.
This is one of the objectives of Personal Communications Networks, e.g.
"The difference with PCN will be the ability to maintain control without
losing calls, screening them in real time so that important calls get
through while others are deferred, but none are actually lost." Thus, the
problem is how does one allow people to be reachable anywhere and any
time, but only by those individuals that they want to reach them?
Studies of highly mobile individuals (e.g., sales people, doctors) show
that a good secretary or receptionist is the currently favored solution.
However, good receptionists are hard to find, relatively expensive to
employ and not on duty 24 hours a day.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a knowledge-based method
and system that automates the receptionist functionality--specifically,
the ability to make and receive calls on behalf of a called party, and the
ability to intelligently screen and route calls in real-time to a highly
mobile called party while also allowing the called party to return a
message such as a text message.
Another object of the present invention is to provide a method and system
which:
determines the name of the person calling;
makes a judgment on whether this call is of sufficient importance that the
person being called, the called party, should be notified that there is a
call waiting and, if so;
locate the client (at work, in his or her car, at home, etc.) and relay the
name of the caller; and
carry out the called party's wishes by the use of out-of-band, two-way
messaging: connect the call, route to a colleague, or take a message.
Still another object of the present invention is to provide a method and
system which answers the telephone promptly, is courteous, provides
accurate information to the caller and the called party, does not keep
callers waiting for any appreciable time and performs the requested
actions reliably by the use of out-of-band, two-way messaging.
Yet still another object of the present invention is to provide a method
and system which performs directory lookup and call transfer services when
the called party is traveling by the use of out-of-band, two-way
messaging.
In carrying out the above objects and other objects of the present
invention, a method is provided for managing telecommunications such as a
telephone call from a caller to an end user. The method includes the step
of receiving the telephone call from the caller. The telephone call
includes caller identification information. The method also includes the
steps of transmitting a first radio signal based on the caller
identification information to a computer having a display screen and
receiving the first radio signal. In addition, the method includes the
steps of presenting a first message identifying the caller and displaying
objects on the display screen. Each object represents a function which may
be performed by the user in response to the call. The method further
includes the step of receiving user selecting data. The user selecting
data represents a selection of one of the objects by the end user to
identify the function to be performed in response to the call. Finally,
the method includes the steps of transmitting a second radio signal
representing a second message identifying the function to be performed,
and processing the second message in response to said second radio signal
to perform the function identified.
Preferably, the second message includes a text message and wherein the
method further comprises the step of converting the text message to a
speech message so that the caller can hear the speech message.
Further in carrying out the above objects and other objects of the
invention, a system is provided for carrying out each of the above method
steps.
The above objects and other objects, features, and advantages of the
present invention are readily apparent from the following detailed
description of the best mode for carrying out the invention when taken in
connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic diagram illustrating the system of the present
invention;
FIG. 2 is a block diagram flow chart illustrating the personal telephone
manager (PTM) of the present invention;
FIG. 3 is a block diagram flow chart illustrating the palm-top application
program of the present invention;
FIG. 4 is a schematic view of a call announcement screen on the palm-top
computer of the present invention;
FIG. 5 is a schematic view illustrating a main personal communicator
program that may be run on the palm-top computer while the unit is
awaiting incoming telephone management messages;
FIG. 6 is a schematic view of a confirmatory screen of the palm-top
computer and a second message;
FIG. 7 is a schematic view of a confirmatory screen of the palm-top
computer and a second message;
FIG. 8 is a schematic view of a reply message entry screen of the palm-top
computer;
FIG. 9 is a schematic view of a personal message screen of the palm-top
computer;
FIG. 10 is a schematic view of a transfer screen of the palm-top computer;
and
FIG. 11 is a schematic view of a transfer call address book of the palm-top
computer.
BEST MODE FOR CARRYING OUT THE INVENTION
Overview Of The Method And System
The method and system of the present invention manages telecommunications
between a called party and a calling party through the use of an
out-of-band, wireless, two-way signaling, messaging and alerting. In this
way, the method and system enables a nomadic called party to screen,
select, and receive calls and exchange messages with callers independent
of location.
As illustrated in FIG. 1, the system operates in combination with a public
local exchange telephone network 10, a software application program called
a personal telephone manager 12 (PTM) which runs on a computer platform
14, a radio network 16 such as the RAM Mobile Data wireless network, a
radio modem (not shown) such as the GE-Ericsson Mobidem, and a palm-top
computer 18, such as the Fujitsu Personal Systems PoqetPad or Poqet Prime.
The called party, through use of the palm-top personal computer 18
equipped with wireless communication capability, can be alerted of
incoming telephone calls and selectively route the calls to a telephone 20
to his or her current location.
FIG. 1, in combination with FIG. 2, depict how telephone calls initiated at
a telephone 22 are processed and routed to the called party or end user. A
call to the end user is routed by the public local exchange network 10 to
the platform 14 where it is processed by the PTM 12.
Upon receiving an incoming call at block 24, the PTM 12 reads and decodes
automatic number identification information at block 26 and consults the
end user's personal data base to translate the calling number information
into the name of the caller. In the event that calling number information
cannot be obtained (e.g. call from outside the local calling area or a
call block feature is invoked on the caller's line), the PTM 12 permits
the caller to enter his or her number using the keypad on the telephone
22, followed by the "#" symbol.
The PTM 12 then attempts to locate the end user and alert him/her of the
incoming call after the calling party is first screened against a personal
profile, at block 28, maintained in the database. If the decision is made
not to make the connection, at block 28, the calling party is connected to
voice mail or messaging at block 29. If the end user is not available at
his/her normal wireline phone, at block 30, a decision is made whether or
not to try to locate the called party based on the personal profile.
At block 30, the location of the end user is checked and if the end user is
available thereat, the call is transferred at block 31. If the end user is
not available at a phone, at block 32, the calling party is put on hold.
The PTM 12 delivers the caller's name and number to the end user's palm-top
computer 18 via the radio network 16 and the Ericsson Mobidem by
broadcasting or transmitting this message as indicated at block 32. In
particular, software in the PTM 12 constructs a data packet containing
information about the caller and the RAM network address of the end user.
This packet is sent to the RAM gateway using Internet IP addressing and
UDP protocol. The RAM gateway receives the packet from the PTM 12,
translates the end user RAM network address to a physical address in the
radio network 16, and routes the message packet to the appropriate radio
node. The packet is then transmitted via the wireless link protocol and,
as indicated at block 34 in FIG. 3, is received by the Ericcson-GE
Mobidem, which in turn, alerts the palm-top computer 18 of the arrival of
a packet at block 36. At block 36, the current palm-top application is
interrupted which may be an application such as those illustrated on the
screen of FIG. 5.
At block 38 in FIG. 2, a determination is made as to whether a return
message is received. If it wasn't received, then block 40 is entered where
an announcement is played to the caller and the call is transferred to
voice mail. If received, block 42 is entered.
The palm-top based application program responds to the arrival of the
packet by issuing an alerting tone and displaying the name and number of
the caller to the end user as indicated at block 36 in FIG. 3 and as
illustrated in FIG. 4. Also, the options to control the telephone call are
displayed on the computer 18. In other words, the palm-top based
application program on the computer 18 displays the name and number of the
caller to the end user, who can use the information to decide how to
respond to the call.
As described in detail herein below, the called party selects a desired
response or reply message in response to prompts generated by the palm-top
application program. The response message may include a telephone number,
text and/or a name. At block 44, the called party transmits the response
message back to the radio network 16 which, in turn, communicates the
response message to the PTM 12. At block 42 in FIG. 2, the PTM 12 reads
the attempts to carry out any commands in the response message.
The end user's options include:
Send a message back to the PTM 12 with routing instructions such as
illustrated on the screen of FIG. 6 (e.g. "route the call to my current
location"), and the PTM 12 will connect the caller to the phone 20 at the
user's current location as indicated at block 44, or
Send a message back instructing the PTM 12 to reject the call (not shown),
or
Send a message back instructing the PTM 12 to route the call to voice mail
as indicated at block 46, or
Send a message back instructing the PTM 12 to route the call to a different
person such as illustrated on the screen of FIG. 7 (e.g., the user's
secretary) and as indicated at block 47, or
Send a text message back to the caller with special instructions (e.g.,
"Call me back in 15 minutes") as indicated at block 48 and the screens of
FIGS. 8 and 9. If this option is used, the PTM 12 converts the reply
message from text to speech as indicated at block 50 in FIG. 2, so the
caller can hear it.
For each of these options, the end user interacts with the palm-top
computer 18 either by entering information via a keyboard 19 in response
to a menu on the palm-up display screen 21, or through use of a stylus
input tool in response to graphical prompts displayed on the palm-top
screen 21. In either case, the application software in the palm-top
computer 18 captures the end user's input and constructs a packet for
transmission back to the PTM 12 via the radio network 16 as indicated at
corresponding blocks 52, 54, 56 and 58 in FIG. 3. The application software
addresses the reply packet to the caller in such a way that it is routed
by the radio network 16 to the Internet gateway, where the appropriate IP
address is used to route the packet to the PTM 12. When the reply packet
is received by the PTM 12, the message is processed and the instructions
of the end user are executed as indicated at block 42 of FIG. 2.
As indicated at block 60 in FIG. 3 and the screens of FIGS. 6 and 7, the
called party is given the chance to review a selected option before the
constructed packet is sent to the wireless network 16 as indicated at
block 45.
If the user decides to accept the call, the PTM, through the platform 14,
will instruct the local exchange network 10 to dial the number associated
with the user's current location, and connect the caller and user as
indicated at block 62 in FIG. 2. As illustrated in FIG. 10, the telephone
number of the end user's current location is entered into the palm-top
computer 18 and provided to the PTM 12 in the message carried on the radio
network 16.
In the event that the end user elects to reject the call, the caller will
be told by the PTM 12 through use of a stored audio message that the user
is not available.
If the end user selected the voice mail option, the PTM 12 will transfer
the caller to the end user's voice mail system as indicated at block 64.
As also indicated at block 62 and in FIG. 11, if the end user decides to
re-route the caller to another number, the end user can either provide the
PTM 12 with the number of the call designation, or with the name of the
designated recipient (e.g., "my secretary") and the PTM 12 will access
information stored in the end user's personal profile to determine the
appropriate routing number.
A data base containing information records of frequently called numbers
(i.e. personalized phone book) may be provided. A number from the data
base can be selected as a destination number for the transfer of the call.
Finally, if the end user chooses to send the caller a message as indicated
at block 66, he/she can (a) choose among several pre-recorded messages
(recorded in a human voice and stored in the PTM 12), as indicated by
block 68 FIG. 8 or (b) as indicted by FIG. 9, enter a message on the
palm-top computer 18 that will be transmitted over the radio network 16,
converted to speech by the PTM 12, and delivered to the caller by the
local exchange telephone network 10 as indicated at block 50.
As described above, the palm-top computer 18 alerts the end user and
supports the interactions needed to screen and route incoming calls. The
palm-top application program interfaces to the GE-Ericsson Mobidem,
exchanging messages to and from the radio network 16, and also interfaces
with the end user. The application supports two types of user input
interfaces: key board input and stylus input.
End user application programs for key board and stylus-based palm-top
computers operate similarly. A message received by the Mobidem is
processed by the palm-top application program, which provides the end user
with a graphical display and an audible tone announcing the incoming call.
The call announcement screen for the stylus-based palm-top, shown in FIG.
4, advises the end user of the name and number of the caller and provides
prompts for the various call disposition options (e.g., "route call to
me", "transfer call to voice mail", etc.).
The end user selects an option (either using the stylus of the pen-based
palm-top computer or key strokes on the key board based palm-top computer
18), and the application then provides the graphical screen appropriate
for the selection. For the stylus-based palm-top computer, selection of
each response option results in a new graphical display. If the end user
selects the option "transfer call to phone number . . . ", the application
provides choices including selection of the routing number from a library
of pre-stored numbers as illustrated in FIG. 11 or the entry of the number
associated with the end user's current location. If the end user chooses
to enter a number, either the key board or the stylus can be used. For
stylus-based input, the palm-top computer uses handwriting recognition to
convert the input to standard machine readable (ASCII) format and display
the converted information to the end user before sending it back to the
PTM 12 as illustrated in FIG. 10. Furthermore, the "Forward Call to"
option can be used to update the last user location.
If the end user elects to send a reply message, the application offers the
option of choosing between several predefined messages as illustrated in
FIG. 8 or entry of a new personal message as illustrated in FIG. 9. The
end user can create and store predefined messages with variable parameters
(e.g., "call me back in X minutes") and enter the parameter value in
response to the incoming call. This feature provides convenience for
frequently used responses.
Other response options result in similar interactions with the end user. In
all cases, the end user is prompted on what actions can be taken and also
given the opportunity to review the selected response, make changes, or
cancel the reply as illustrated in FIGS. 6 and 7.
The specific implementation described above is limited in functionality by
the availability of commercial networks and terminal equipment. The PTM 12
may exploit emerging technologies to overcome a variety of limitations.
Improvements suggested by experience with the current implementation
include:
1. Integration of the radio modem and the palm-top computer 18. As
described above, the radio modem and the palm-top computer 18 are separate
units. A more suitable implementation would be achieved by including the
radio modem in the palm-top computer 18 and reducing the size of the
combined unit to fit in the end user's pocket or purse.
2. Use of alternative radio networks. In the present system, wireless
connectivity is preferably provided by the RAM network. A more optimal
implementation would allow the end user to communicate with the PTM 12 via
alternative wireless network providers. The PTM 12, the radio modem and
the application software in the user terminal would be agile and capable
of responding to different protocols.
3. Use of speech-to-text conversion or voice recognition, such as template
matching, to identify the caller. As described above, the PTM 12
identifies the caller by calling number, provided either by the local
exchange network 12 or explicitly keyed in by the caller. A more optimal
implementation would enable the caller to speak to the PTM 12 and the
information would be translated to text for call screening either by the
PTM 12 or for transmission as text to the end user.
4. Use of speech-to-text conversion for end user response to the
PTM/caller. As described above, the end user responds to calls by keyboard
or stylus. A more optimal implementation would enable the end user to
respond to calls by issuing verbal commands to the palm-top computer 18,
which would translate these to text or speech messages for packet
transmission.
5. End user profile management. As described above, the end user can modify
his/her service profile (used by the PTM 12 to screen and redirect calls)
by either entering instructions via the key pad of a wireline telephone or
by using a computer terminal. A more optimal implementation would enable
the end user to modify the service profile via the palm-top computer 18.
6. Security features. As described above, the messages transmitted over the
radio network 16 are not encrypted. A more optimal implementation would
insure privacy through the use of message encryption. A more optimal
implementation would also include validation procedures in which the
palm-top computer 18 would validate itself to the network 16 (e.g., use of
a password or a public key) and the end user would also be validated
through a public or private key technique or through speaker recognition
techniques.
7. Alerting features. As described above, the palm-top computer 12 alerts
the end user of an incoming call with an audible tone. A more optimal
implementation would provide less intrusive alternatives such as a
flashing light or icon, or a vibration.
8. Caller voice clip transmission. As described above, only the telephone
number and the name of the calling party is sent to the palm-top computer.
A more optimal implementation is to forward a voice clip from the caller
which describes the nature and subject of the call. This can be digitized
by the system and sent in a digitally encoded form over the radio network
and connected to audio and played back over a speaker on the palm-top
computer.
9. Using various palm-top computer platforms and operating systems. The
system is described using a particular palm-top computer and operating
system. More optimal implementation would include the use of other
palm-top computer platforms and operating systems.
10. Using various handwriting recognition systems. As described above, the
palm-top computer uses a particular handwriting recognition system to
enable the end user to enter numbers and text messages. In a more optimal
implementation, other more efficient and accurate handwriting recognition
techniques, including electronic ink techniques, could be used to enter
and transfer information.
11. Radio Link Protocols. As described above, the wireless data network
provided reliable TCP/IP datagram service between the data gateway and the
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