EP0948222A2
Expired / Lapsed
EP
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Mobile wireless transceiver and transfer method
Assignee: International Business Machines Corp
•
Filing: 1999-03-11
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Granted: —
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Expires: 2019-03-11
Abstract
Abstract Information transmitted from an information origin is transferred from one mobile station to another. At this time, in the mobile station, the transmission of the information is controlled so that the information is not transmitted to a distance more than a predetermined value from the position of the information origin. A valid period of the information is defined and only the information within the valid period is transmitted. Alternatively, controls are carried out in order to avoid overlapping of the transfer paths and detours of them. Particularly, if a density of the mobile stations becomes high, the quantity of the information to be transferred increases tremendously. Therefore, it is necessary to select and limit the information to be transferred. If the mobile station is a portable information terminal and a personal user has this portable information terminal, the information origin is a retail store and transmits special sale information and the like as well as position information. The user holding the portable information terminal may go to the special sale store after seeing the special sale information, and if he feels no interest in it, he leaves the special sale store. When the user is walking on the street after leaving the store, the portable information terminal held by the user who was in the store exchanges information with an information portable terminal of the other users. While repeating the exchange of the information, the information reaches to a person who has an interest in the special sale information.
Inventors
- 👤 Ryohji Honda
- 👤 Fumihiko Kitayama
- 👤 Kazushi Kuse
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 06:35
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
82 words
A method for determining in a mobile wireless transceiver whether
received information including position information of an information
origin is to be transferred to another mobile wireless transceiver, the
method comprising the steps of: calculating a distance from the information origin to the mobile
wireless transceiver using the position information; comparing the distance with a predetermined threshold value; and determining that the received information is not to be transferred
if the distance is greater than or equal to the predetermined threshold
value.
Claim 2
Independent Claim
65 words
A method for determining in a mobile wireless transceiver whether
information received at the transceiver is to be transferred to another
mobile wireless transceiver, the method comprising the steps of: judging whether or not a valid period associated with the received
information has expired; and determining that the received information is not to be transferred
if the valid period of the received information has expired.
Claim 3
Dependent Claim
59 words
The method according to claim 2, wherein the received information
includes information representing the time of transmission by an
information origin, and the step of judging whether the valid period of
the received information has expired or not includes a step of judging
whether a predetermined time has elapsed from the transmission time by
using the transmission time information.
Claim 4
Dependent Claim
48 words
The method according to claim 2, wherein the received information
includes information concerning a valid time period from an information
origin, and the step of judging whether the valid period of the received
information is expired includes a step of judging whether the valid time
period has expired.
Claim 5
Independent Claim
90 words
A method for determining in a mobile wireless transceiver whether
received information including position information of a transmission
source is to be transferred to another mobile wireless transceiver, the
method comprising the steps of: detecting a density of the mobile wireless transceivers in the
vicinity; calculating a distance from the transmission source using the
position information of the transmission source; judging whether or not, the density and the distance satisfy a
predetermined condition; and determining that the received information is not to be transferred
if the predetermined condition is satisfied.
Claim 6
Dependent Claim
52 words
The method according to claim 5, wherein the step of judging
whether the density and the distance satisfy a predetermined condition
includes a step of judging whether or not the density is greater than or
equal to a predetermined value and the distance is less than or equal to
a predetermined value.
Claim 7
Dependent Claim
41 words
The method according to claim 5, wherein the step of judging
whether the density and the distance satisfy a predetermined condition or
not includes a step of judging whether or not the density and the
distance satisfy a predetermined relationship equation.
Claim 8
Independent Claim
119 words
A method for determining in a mobile wireless transceiver whether
received information including position information of an information
origin and position information of a transmission source is to be
transferred, the information origin primarily transmitting information,
the method comprising the steps of: judging whether an angle between a first line connecting the
information origin and the transmission source and a second line
connecting the transmission source and the mobile wireless transceiver
itself is within a predetermined angle, using the position information of
the information origin and the position information of the transmission
source; and determining that the received information is not to be transferred
if the angle between the first and second lines is not within the
predetermined angle.
Claim 9
Dependent Claim
24 words
The method according to claim 8, wherein the predetermined angle is
determined based on a density of the mobile wireless transceivers in the
vicinity.
Claim 10
Independent Claim
159 words
A method for determining in a mobile wireless transceiver whether
received information including position information of an information
origin and position information of a transmission source is to be
transferred, the information origin primarily transmitting information,
the method comprising the steps of: detecting an average distance from the mobile wireless transceiver
itself to other mobile wireless transceivers; using the position information of the information origin and the
position information of the transmission source to judge whether the
mobile wireless transceiver itself is within an area surrounded with two
lines which contact with a circle whose center is located at a position
apart from the transmission source by a receiving limitation distance of
wireless signals as well as on a line connecting the information origin
and the transmission source and whose radius is equal to the average
distance; and determining that the received information is not to be transferred
if said mobile wireless transceiver itself is not within the area.
Claim 11
Dependent Claim
60 words
The method according to claim 9, further comprising the steps of: judging whether a distance from the transmission source is the same
as or longer than a value obtained by subtracting the average distance
from the receiving limitation distance or not; and determining that the received information is not to be transferred
if the distance is shorter than the value.
Claim 12
Dependent Claim
105 words
A mobile wireless transceiver comprising: a receiver for receiving a wireless signal of transfer information
including position information of an information origin; a transmitter for transmitting the wireless signal; a position detector for detecting a position of the mobile wireless
transceiver itself; and a controller for calculating a distance from the position of the
information origin to the position of the mobile wireless transceiver
itself by using the position information, comparing the distance with a
predetermined threshold value, and determining that the transfer
information is not to be transmitted by the transmitter if the distance
is greater than or equal to the predetermined threshold value.
Claim 13
Dependent Claim
59 words
A mobile wireless transceiver comprising: a receiver for receiving a wireless signal of transfer information; a transmitter for transmitting the wireless signal; and a controller for judging whether or not a valid period of the
transfer information has expired, and determining that the transfer
information is not to be transmitted by the transmitter if the valid
period has expired.
Claim 14
Dependent Claim
46 words
The mobile wireless transceiver according to claim 13, wherein the
transfer information includes information representing the transmission
time by an information origin, and the controller is operable to judge
using the transmission time information whether or not a predetermined
time has elapsed from the transmission time.
Claim 15
Dependent Claim
37 words
The mobile wireless transceiver according to claim 13, wherein the
transfer information includes information concerning a valid time period
specified by an information origin, and the controller judges whether or
not the valid time period has expired.
Claim 16
Dependent Claim
133 words
A mobile wireless transceiver comprising: a receiver for receiving a wireless signal of transfer information
including position information of a transmission source; a transmitter for transmitting the wireless signal; a position detector for detecting a position of the mobile wireless
transceiver itself; and a controller for calculating a distance from the position of the
transmission source to the position of the mobile wireless transceiver
itself using position information of the transmission source, detecting a
density of the mobile wireless transceivers existing in the vicinity
using position information of the transmission sources of a plurality of
wireless signals received by the receiver, judging whether the density
and the distance satisfy predetermined conditions or not, and determining
that the transfer information is not to be transmitted by the transmitter
if the predetermined conditions are satisfied.
Claim 17
Dependent Claim
38 words
The mobile wireless transceiver according to claim 16, wherein the
controller judges whether or not the density is greater than or equal to
a predetermined value and the distance is less than or equal to a
predetermined value.
Claim 18
Dependent Claim
25 words
The mobile wireless transceiver according to claim 16, wherein the
controller judges whether or not the density and the distance satisfy a
predetermined relationship formula.
Claim 19
Dependent Claim
137 words
A mobile wireless transceiver comprising: a receiver for receiving a wireless signal of transfer information
including position information of an information origin initially
transmitting information and position information of a transmission
source; a detector for detecting a position of the mobile wireless
transceiver itself; a transmitter for transmitting a wireless signal; and a controller for judging whether an angle between a first line
connecting information origin and the transmission source and a second
line connecting the transmission source and the mobile wireless
transceiver itself is within a predetermined angle or not by using the
position information of the information origin and the position
information of the transmission source, and determining that the transfer
information is not to be transferred by the transmitter if the angle
between the first and second lines is not within the predetermined angle.
Claim 20
Dependent Claim
44 words
The transceiver according to claim 19, wherein the predetermined
angle is determined based on a density of mobile wireless transceivers in
the vicinity which is obtained using the position information of the
transmission sources of a plurality of wireless signals received by the
receiver.
Claim 21
Dependent Claim
187 words
A mobile wireless transceiver comprising: a receiver for receiving a wireless signal of transfer information
which includes position information of an information origin initially
transmitting information and position information of a transmission
source; a transmitter for transmitting the wireless signal; and a controller for detecting an average distance between the mobile
wireless transceiver itself and other mobile wireless transceivers using
the position information of the transmission sources of a plurality of
wireless signals received by the receiver, judging whether the mobile
wireless transceiver itself is within an area surrounded with two lines
which contact with a circle or not by using the position information of
the information origin and the position information of the transmission
source, wherein the center of the circle is located at a position apart
from the transmission source by a receiving limitation distance of
wireless signals as well as on a line connecting the information origin
and the transmission source, and the radius of the circle is equal to the
average distance, and determining that the received information is not to
be transferred if the mobile wireless transceiver is not within the area.
Claim 22
Dependent Claim
58 words
The transceiver according to claim 21, wherein the controller
judges whether a distance from the transmission source is greater than or
equal to a value obtained by subtracting the average distance from the
receiving limitation distance, and determines that the transfer
information is not to be transmitted by the transmitter if the distance
is shorter than the value.
References Cited (Backward Citations)
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