Patent EP0918420A2 successfully refreshed from Google Patents.
EP0918420A2
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EP
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Wireless data transfer method and system
Assignee: NEC Corp
•
Filing: 1998-11-20
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Granted: —
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Expires: 2018-11-20
Abstract
Abstract The invention provides a method for sending/receiving digital data between terminals via a central apparatus by using a wireless transmission network. A source terminal sends only a mail header including attribution information of the digital data to the central apparatus and a destination terminal receives the digital data from the source terminal only when the digital data is determined to be necessary by referring to the mail header in the central apparatus. A recipient of data is able to reduce unnecessary communication costs and to save storage resources in the central apparatus and in the system.
Inventors
- 👤 Yushi c/o NEC Home Electronics Ltd. Niwa
- 👤 Hidehiro c/o NEC Corporation Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 15:32
CPC Classifications
H; H04; H04W; H04W4/00; H04W4/12; H04L; H04L12/00; H04L12/28; H04L51/00; H04L51/58; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0219; H04W52/0225; H04W52/0229; H04W52/0245; H04W52/0261; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
A wireless data transfer method of sending/receiving digital
data between a source terminal (101) and a destination terminal (103)
via a central apparatus (102) by using a wireless transmission network,
the digital data being divided into a header and a remaining part,
including the steps of sending the header from the source terminal (101) to the central
apparatus (102), and receiving the digital data at the destination terminal (103) from
the source terminal (101) by monitoring only the header in the central
apparatus (102).
Claim 2
Dependent Claim
17 words
A method as claimed in claim 1, wherein the header includes
attribution information for the digital data.
Claim 3
Dependent Claim
38 words
A method as claimed in claim 2, wherein the attribution
information includes an ID identifying the source terminal (101), the size
of the digital data, the title of the digital data, and an ID identifying the
digital data.
Claim 4
Dependent Claim
44 words
A method as claimed in claim 3, further including the steps of storing in the central apparatus (102) the digital data from the
source terminal (101) on predetermined conditions and supplying to the
destination terminal (103) the digital data from the central apparatus
(102).
Claim 5
Dependent Claim
48 words
A method as claimed in claim 4, including the step of storing in the central apparatus (102) the digital data when the
size of the digital data is lower than a predetermined value and/or the
destination terminal (103) has not been accessed for a given period of
time.
Claim 6
Dependent Claim
53 words
A method as claimed in claim 4, including the step of storing in the destination terminal (103) a reservation for
receiving the necessary digital data before the destination terminal (103)
receives the digital data from the source terminal (101) and receives the
digital data based on the reservation for receipt of the data.
Claim 7
Dependent Claim
37 words
A method as claimed in claim 6, including the step of receiving at the destination terminal (103) digital data from
source terminals (101) collectively and at every source terminal (101) by
sorting the data reserved for receiving.
Claim 8
Dependent Claim
52 words
A method as claimed in claim 6, including the step of automatically receiving at the destination terminal (103) the
remaining digital data after a given period of time by having stored the
data reserved for subsequent receipt when the receiving of the digital
data from the source terminal (101) has been suspended.
Claim 9
Dependent Claim
62 words
A method as claimed in claim 1, including the step of supplying from the source terminal (101) the digital data to the
destination terminal (103) in the form of divided data (1502 - 1506),
when the destination terminal (103) receives the digital data from the
source terminal (101) and the size of the digital data to be received
exceeds a predetermined value.
Claim 10
Dependent Claim
47 words
A method as claimed in claim 1, including the step of suspending the receipt of the digital data, when the destination
terminal (103) is to receive the digital data from the source terminal
(101), if a predetermined condition with respect to the receiving quality is
not satisfied.
Claim 11
Dependent Claim
25 words
A method as claimed in claim 10, wherein the condition is
that the power of a battery at the destination terminal (103) is not
enough.
Claim 12
Dependent Claim
32 words
A method as claimed in claim 10, wherein the condition is
that the receiving field intensity at the destination terminal (103) is not
sufficiently high for the radio network to be used.
Claim 13
Dependent Claim
39 words
A method as claimed in claim 10, wherein the condition is
that a check-sum originally appended to the digital data and a check-sum
derived from the received digital data are not identical for a
predetermined number of times successively.
Claim 14
Dependent Claim
84 words
A wireless data transfer system for sending/receiving
digital data between terminals via a central apparatus (102) by using
a wireless transmission network, the digital data being divided into
a header and a remaining part, the system including a source terminal (101) which sends to the central apparatus
(102) the header, and a destination terminal (103) which receives the digital data from
the source terminal (101) when the digital data is determined to be
needed by monitoring only the header in the central apparatus (102).
Claim 15
Dependent Claim
88 words
A computer readable medium which stores a program
operable in a wireless data transfer system for sending/receiving
digital data between terminals via a central apparatus (102) by using
a wireless transmission network, the digital data being divided into
a header and a remaining part, the program including the steps
of sending the header from a source terminal (101) to the central
apparatus (102), and receiving the digital data at a destination terminal (103) from the
source terminal (101) by monitoring only the header in the central
apparatus (102).
References Cited (Backward Citations)
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