EP0940930A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of controlling transmission power in a cellular type mobile communication system
Assignee: NEC Corp
•
Filing: 1999-03-02
•
Granted: —
•
Expires: 2019-03-02
Abstract
Abstract A cellular type mobile communication system comprises a plurality of cells (11, 12), a plurality of base stations (21, 22) disposed in the respective cells, and a mobile station (61A; 62A) moving in the cells. On reception of a control command for a transmission power from the mobile station, each base station (21, 22) increases or decreases (S104, S105) the transmission power (P) in response to the control command. In addition, each base station (21, 22) renews (S106) the transmission power (P) so that the transmission power (P a ) after increased or decreased approaches a predetermined reference power (C).
Inventors
- 👤 Kojiro Hamabe
- 👤 Shousei Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 01:10
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/30; H04W52/34; H04W52/343; H04W52/346; H04W52/38; H04W52/40
Claims Analysis
Total Claims: 54
Claim 1
Independent Claim
160 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21, 22) disposed
in the respective cells, and a mobile station (61; 62) moving in
said cells, said mobile station carrying out communication with
at least one base stations by establishing a channel between said
mobile station with said at least one base station, characterized
in that said method comprises the steps of: receiving (YES in S102), in each base station, a control
command for the transmission power from said mobile station while
said mobile station establishes the channel with said at least
one base station; increasing or decreasing (S103, S104, S105), in each base
station, the transmission power (P) in response to the control
command; and renewing (S106), in each base station, the transmission
power (P) so that the transmission power (P a ) after increased or
decreased approaches a predetermined reference power (C).
Claim 2
Independent Claim
230 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21, 22) disposed
in the respective cells, and a mobile station (61; 62) moving in
said cells, said mobile station carrying out communication with
at least one base stations by establishing a channel between said
mobile station and said at least one base station, characterized
in that said method comprises the steps of: receiving (YES in S102), in each base station, a control
command for the transmission power from said mobile station while
said mobile station establishes the channel between said mobile
station and said at least one base station; increasing or decreasing (S103, S104, S105), in each base
station, the transmission power in response to the control
command; and renewing (S106), in each base station, the transmission
power (P) so that a difference (P a - C) between the transmission
power (P a ) after increased or decreased and a predetermined
reference power (C) is r times as large as a difference (P b - C)
between the transmission power (P b ) before renewed and the
predetermined reference power (C), namely, P a = r(P b - C) + C, where r represents a coefficient which is not less than zero and
which is less than one, namely, (0 ≦ r < 1).
Claim 3
Dependent Claim
81 words
A method as claimed in claim 2, wherein the coefficient
r is determined so that a product ( (Pmax - Pmin)(1 - r) ) of a
difference (Pmax - Pmin) between a maximum value (Pmax) and a
minimum value (Pmin) in a control range for the transmission power
and another coefficient (1 - r) is less than a changing step (ΔP)
for the transmission power in a case of increasing or decreasing
the transmission power in response to the control command.
Claim 4
Independent Claim
182 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21, 22) disposed
in the respective cells, and a mobile station (61; 62) moving in
said cells, said mobile station carrying out communication with
at least one base stations by establishing a channel between said
mobile station and said at least one base station, characterized
in that said method comprises the steps of: repeatedly carrying out a first transmission power control
operation (S102, S103, S104, S105) where said mobile station
transmits a control command for the transmission power to said
at least one base station while said mobile station establishes
the channel with said at least one base station and said at least
one base station receives the control command to change the
transmission power (P) in response to the control command; and repeatedly carrying out a second transmission power
control operation (S106) which renews the transmission power (P)
so that the transmission power (P a ) for said base station
approaches a predetermined reference power (C).
Claim 5
Independent Claim
200 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21, 22) disposed
in the respective cells, and a mobile station (61; 62) moving in
said cells, said mobile station carrying out communication with
at least one base stations by establishing a channel between said
mobile station and said at least one base station, characterized
in that said method comprises the steps of: repeatedly carrying out a first transmission power control
operation (S102, S103, S104, S105) where said mobile station
transmits a control command for the transmission power to said
at least one base station while said mobile station establishes
the channel with said at least one base station and said at least
one base station receives the control command to change the
transmission power (P) in response to the control command; and repeatedly carrying out a second transmission power
control operation (S106) which renews the transmission power (P)
in each base station so that an absolute value of a difference
(P - C) between a predetermined reference power (C) in dB and the
transmission power (P) in dB decreases at a predetermined rate
(r).
Claim 6
Independent Claim
25 words
A method as claimed in any of claims 1 to 5, wherein the
predetermined reference power (C) is equal to a maximum
transmission power (Pmax).
Claim 7
Independent Claim
193 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21A, 22A) disposed
in the respective cells, and a mobile station (61A; 62A) moving
in said cells, said mobile station carrying out communication with
at least one base stations by establishing a channel between said
mobile station and said at least one base station, characterized
in that said method comprises the steps of: receiving (YES in S204; YES in S403; YES in S503), in each
base station, a control command for the transmission power from
said mobile station (61A) while said mobile station (61A)
establishes channels with said plurality of stations; increasing or decreasing (S205, S206, S207; S404, S405,
S406; S504, S505, S506), in each base station, the transmission
power (P) in response to the control command; and renewing (S209; S409; S507), in each base station, the
transmission power (P) so that the transmission powers (P a ) in
said plurality of base stations after increased or decreased have
less difference and approach a reference power (C) which is
defined in said plurality of base stations in common.
Claim 8
Independent Claim
257 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21A, 22A) disposed
in the respective cells, and a mobile station (61A; 62A) moving
in said cells, said mobile station carrying out communication with
at least one base stations by establishing a channel between said
mobile station and said at least one base station, characterized
in that said method comprises the steps of: receiving (YES in S204; YES in S403; YES in S503), in each
of said plurality of base stations, a control command for the
transmission power from said mobile station while said mobile
station establishes channels with said plurality of base
stations; increasing or decreasing (S205, S206, S207; S404, S405,
S406; S504, S505, S506), each of said plurality of base stations,
the transmission power (P) in response to the control command;
and renewing (S209; S409; S507), in each of said plurality of
base stations, the transmission power (P) so that a difference
(P a - C) between the transmission power (P a ) after increased or
decreased and a reference power (C) defined in said plurality of
base stations in common is r times as large as a difference (P b - C) between the transmission power (P b ) before renewed and the
reference power (C), namely, P a = r(P b - C) + C, where r represents a coefficient which is not less than zero and
which is less than one, namely, (0 ≦ r < 1).
Claim 9
Dependent Claim
81 words
A method as claimed in claim 8, wherein the
coefficient r is determined so that a product ( (Pmax - Pmin)(1
- r) ) of a difference (Pmax - Pmin) between a maximum value (Pmax)
and a minimum value (Pmin) in a control range for the transmission
power and another coefficient (1 - r) is less than a changing step
(ΔP) for the transmission power in a case of increasing or
decreasing the transmission power in response to the control
command.
Claim 10
Independent Claim
206 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21A, 22A) disposed
in the respective cells, and a mobile station (61A; 62A) moving
in said cells, said mobile station carrying out communication with
at least one base station by establishing a channel between said
mobile station and said at least one base station, characterized
in that said method comprises the steps of: repeatedly carrying out a first transmission power control
operation (S204, S205, S206, S207; S403, S404, S405, S406; S503,
S504, S505, S506) where said mobile station transmits a control
command for the transmission power to said plurality of base
stations while said mobile station establishes channels with said
plurality of base stations and each of said plurality of base
stations receives the control command to change the transmission
power (P) in response to the control command; and repeatedly carrying out a second transmission power
control operation (S209; S409; S507) which renews the
transmission power (P) so that the transmission powers (P a ) for
said plurality of base stations have less difference and approach
a reference power (C) which is defined in said plurality of base
stations in common.
Claim 11
Independent Claim
229 words
A method of controlling transmission power in a
cellular type mobile communication system comprising a plurality
of cells (11, 12), a plurality of base stations (21A, 22A) disposed
in the respective cells, and a mobile station (61A; 62A) moving
in said cells, said mobile station carrying out communication with
at least one base stations by establishing a channel between said
mobile station and said at least one base station, characterized
in that said method comprising the steps of: repeatedly carrying out a first transmission power control
operation (S204, S205, S206, S207; S403, S404, S405, S406; S503,
S504, S505, S506) where said mobile station (61A) transmits a
control command for the transmission power to each of said
plurality of base stations while said mobile station (61A)
establishes channels with said plurality of base stations and each
of said plurality of base stations receives the control command
to change the transmission power (P) in response to the control
command; and repeatedly carrying out a second transmission power
control operation (S209; S409; S507) where each of said plurality
of base stations renews the transmission power (P) so that an
absolute value of a difference (P - C) between a reference power
(C) in dB defined in said plurality of base stations in common
and the transmission power (P) in dB decreases at a common rate
(r) in said plurality of base stations.
Claim 12
Independent Claim
24 words
A method as claimed in any of claims 7 to 11, wherein the reference
power (C) is equal to a maximum transmission power (Pmax).
Claim 13
Independent Claim
43 words
A method as claimed in any of claims 7 to 11, wherein the reference
power (C) is equal to an intermediate power ( (Pmax - Pmin)/2 )
between a maximum transmission power (Pmax) in dB and a minimum
transmission power (Pmin) in dB.
Claim 14
Independent Claim
24 words
A method as claimed in any of claims 7 to 11, wherein the reference
power (C) is equal to a minimum transmission power (Pmin).
Claim 15
Independent Claim
120 words
A method as claimed in any of claims 7 to 14, said cellular type
mobile communication system further comprising a control station
(71A) connected to said plurality of base stations, wherein said
method further comprises the steps of: calculating, in each of said plurality of base stations,
a statistical value of the transmission power to transmit the
statistical value to said control station; calculating (706), in said control station, a reference
value indicating the reference power (C) using the statistical
values of said plurality of base stations to send the reference
value to said plurality of base stations; and using, in each of said plurality of base stations, the
reference power having the reference value sent from said control
station.
Claim 16
Dependent Claim
23 words
A method as claimed in claim 15, wherein said control
station uses, as the reference value, a maximum one of the
statistical values.
Claim 17
Dependent Claim
31 words
A method as claimed in claim 15, wherein said control
station determines the common rate (r) in accordance with mutual
differences among the statistical values of the plurality of base
stations.
Claim 18
Dependent Claim
38 words
A method as claimed in claim 15, wherein said control
station determines frequency for renewing the transmission power
by the common rate (r) in accordance with mutual differences among
the statistical values of the plurality of base stations.
Claim 19
Independent Claim
130 words
A method as claimed in any of claims 7 to 11, said mobile station
has an accumulated control value (A) for the transmission power
in said base stations, wherein said method further comprises the
steps of: renewing (S303, S304, S305, S306), in said mobile station,
the accumulated control value (A) on transmitting the control
command for the transmission power to the base stations; transmitting (S307, S308), from said mobile station, the
accumulated control value (A) to said plurality of base stations
at a time interval (Tint) which is longer than a repetition time
interval of a changing operation for the transmission power; and determining (S408), in each of said plurality of base
stations, the reference power (C) using the accumulated control
value (A) received therein to use the reference power.
Claim 20
Independent Claim
27 words
A method as claimed in any of claims 7 to 11, wherein said
plurality of base stations simultaneously carry out a renewal of
the respective transmission powers.
Claim 21
Dependent Claim
150 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21, 22) disposed in the respective
cells, and a mobile station (61; 62) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: receiving means (203, S102) for receiving a control
command for the transmission power from said mobile station while
said mobile establishes the channel with said at least one base
station; changing means (205, S103, S104, S105) for changing the
transmission power (P) in response to the control command; and renewing means (205, S106) for renewing the transmission
power (P) so that the transmission power (P a ) after changed
approaches a predetermined reference power (C).
Claim 22
Dependent Claim
217 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21, 22) disposed in the respective
cells, and a mobile station (61; 62) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: receiving means (203, S102) for receiving a control
command for the transmission power from said mobile station while
said mobile station establishes the channel with said at least
one base station; changing means (205, S103, S104, S105) for changing the
transmission power (P) in response to the control command; and renewing means (205, S106) for renewing the transmission
power (P) so that a difference (P a - C) between the transmission
power (P a ) after changed and a predetermined reference power (C)
is r times as large as a difference (P b - C) between the
transmission power (P b ) before renewed and the predetermined
reference power (C), namely, P a = r(P b -C) + C, where r represents a coefficient which is not less than zero and
which is less than one, namely, (0 ≦ r < 1).
Claim 23
Dependent Claim
80 words
A base station as claimed in claim 22, wherein the
coefficient r is determined so that a product ( (Pmax - Pmin)(r
- 1) ) of a difference (Pmax - Pmin) between a maximum value (Pmax)
and a minimum value (Pmin) in a control range for the transmission
power and another coefficient (1 - r) is less than a changing step
(ΔP) for the transmission power in a case of changing the
transmission power in response to the control command.
Claim 24
Dependent Claim
183 words
A cellular type mobile communication system
comprising a plurality of cells (11, 12), a plurality of base
stations (21, 22) disposed in the respective cells, and a mobile
station (61; 62) moving in said cells, said mobile station
carrying out communication with at least one base stations by
establishing a channel between said mobile station and said at
least one base station, characterized in that said cellular type
mobile communication system comprises: means (203, 205) for repeatedly carrying out a first
transmission power control operation (S102, S103, S104, S105)
where said mobile station transmits a control command for the
transmission power to said at least one base station while said
mobile station establishes the channel with said at least one base
station and said at least one base station receives the control
command to change the transmission power (P) in response to the
control command; and means (205) for repeatedly carrying out a second
transmission power control operation (S106) which renews the
transmission power (P) so that the transmission power (P a ) for
said base station approaches a predetermined reference power (C).
Claim 25
Dependent Claim
201 words
A cellular type mobile communication system
comprising a plurality of cells (11, 12), a plurality of base
stations (21, 22) disposed in the respective cells, and a mobile
station (61; 62) moving in said cells, said mobile station
carrying out communication with at least one base stations by
establishing a channel between said mobile station and said at
least one base station, characterized in that said cellular type
mobile communication system comprises: means (203, 205) for repeatedly carrying out a first
transmission power control operation (S102, S103, S104, S105)
where said mobile station transmits a control command for the
transmission power to said at least one base station while said
mobile station establishes the channel with said at least one base
station and said at least one base station receives the control
command to change the transmission power (P) in response to the
control command; and means (205) for repeatedly carrying out a second
transmission power control operation (S106) which renews the
transmission power (P) in each base station so that an absolute
value of a difference (P - C) between a predetermined reference
power (C) in dB and the transmission power (P) in dB decreases
at a predetermined rate (r).
Claim 26
Dependent Claim
154 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21, 22) disposed in the respective
cells, and a mobile station (61; 62) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: a receiving circuit (203, S102) for receiving a control
command for the transmission power from said mobile station while
said mobile station establishes the channel with said at least
one base station; a changing circuit (205, S103, S104, S105) for changing
the transmission power (P) in response to the control command;
and a renewal circuit (205, S106) for renewing the
transmission power (P) so that the transmission power (P a ) after
changed approaches a predetermined reference power (C).
Claim 27
Dependent Claim
221 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21, 22) disposed in the respective
cells, and a mobile station (61; 62) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: a receiving circuit (203, S102) for receiving a control
command for the transmission power from said mobile station while
said mobile station establishes the channel with said at least
one base station; a changing circuit (205, S103, S104, S105) for changing
the transmission power (P) in response to the control command;
and a renewal circuit (205, S106) for renewing the
transmission power (P) so that a difference (P a - C) between the
transmission power (P a ) after changed and a predetermined
reference power (C) is r times as large as a difference (P b - C)
between the transmission power (P b ) before renewed and the
predetermined reference power (C), namely, P a = r(P b - C) + C, where r represents a coefficient which is not less than zero and
which is less than one, namely, (0 ≦ r < 1).
Claim 28
Dependent Claim
177 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21, 22) disposed in the respective
cells, and a mobile station (61; 62) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: a first transmission power controller (203, 205) for
repeatedly carrying out a first transmission power control
operation (S102, S103, S104, S105) for changing a transmission
power (P) in response to a control command for the transmission
power while said mobile station establishes the channel with said
at least one base station, the control command being received from
said mobile station; and a second transmission power controller (205) for
repeatedly carrying out a second transmission power control
operation (S106) for renewing the transmission power (P) so that
the transmission power (P a ) for said base station approaches a
predetermined reference power (C).
Claim 29
Dependent Claim
191 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21, 22) disposed in the respective
cells, and a mobile station (61; 62) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: a first transmission power controller (203, 205) for
repeatedly carrying out a first transmission power control
operation (S102, S103, S104, S105) for changing a transmission
power (P) in response to a control command for the transmission
power while said mobile station establishes the channel with said
at least one base station, the control command being received from
said mobile station; and a second transmission power controller (205) for
repeatedly carrying out a second transmission power control
operation (S106) for renewing the transmission power (P) so that
an absolute value of a difference (P - C) between a predetermined
reference power (C) in dB and the transmission power (P) in dB
decreases at a predetermined rate (r).
Claim 30
Dependent Claim
26 words
A base station as claimed in any of claims 21 to 29, wherein the
predetermined reference power (C) is equal to a maximum
transmission power (Pmax).
Claim 31
Dependent Claim
183 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21A, 22A) disposed in the respective
cells, and a mobile station (61A; 62A) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises the steps of: receiving means (203, S204; S403; S503) for receiving a
control command for the transmission power from said mobile
station (61A) while said mobile station (61A) establishes
channels with said plurality of stations; changing means (205, S205, S206, S207; S404, S405, S406;
S504, S505, S506) for changing the transmission power (P) in
response to the control command; and renewing means (205, S209; S409; S507) for renewing the
transmission power (P) so that the transmission powers (P a ) in
said plurality of base stations after changed have less difference
and approach a reference power (C) which is defined in said
plurality of base stations in common.
Claim 32
Dependent Claim
232 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21A, 22A) disposed in the respective
cells, and a mobile station (61A; 62A) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: receiving means (203, S204; S403; S503) for receiving a
control command for the transmission power from said mobile
station while said mobile station establishes channels with said
plurality of base stations; changing means (205, S205, S206, S207; S404, S405, S406;
S504, S505, S506) for changing the transmission power (P) in
response to the control command; and renewing means (205, S209; S409; S507)for renewing the
transmission power (P) so that a difference (P a - C) between the
transmission power (P a ) after changed and a reference power (C)
defined in said plurality of base stations in common is r times
as large as a difference (P b - C) between the transmission power
(P b ) before renewed and the reference power (C), namely, P a = r(P b - C) + C, where r represents a coefficient which is not less than zero and
which is less than one, namely, (0 ≦ r < 1).
Claim 33
Dependent Claim
82 words
A base station as claimed in claim 32 wherein the
coefficient r is determined so that a product ( (Pmax - Pmin)(1
- r) ) of a difference (Pmax - Pmin) between a maximum value (Pmax)
and a minimum value (Pmin) in a control range for the transmission
power and another coefficient (1 - r) is less than a changing step
(ΔP) for the transmission power in a case of increasing or
decreasing the transmission power in response to the control
command.
Claim 34
Dependent Claim
186 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21A, 22A) disposed in the respective
cells, and a mobile station (61A; 62A) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises the steps of: a receiving circuit (203, S204; S403; S503) for receiving
a control command for the transmission power from said mobile
station (61A) while said mobile station (61A) establishes
channels with said plurality of stations; a changing circuit (205, S205, S206, S207; S404, S405,
S406; S504, S505, S506) for changing the transmission power (P)
in response to the control command; and a renewing circuit (205, S209; S409; S507) for renewing
the transmission power (P) so that the transmission powers (P a )
in said plurality of base stations after changed have less
difference and approach a reference power (C) which is defined
in said plurality of base stations in common.
Claim 35
Dependent Claim
236 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12)
a plurality of base stations (21A, 22A) disposed in the respective
cells, and a mobile station (61A; 62A) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: a receiving circuit (203, S204; S403; S503) for receiving
a control command for the transmission power from said mobile
station while said mobile station establishes channels with said
plurality of base stations; a changing circuit (205, S205, S206, S207; S404, S405,
S406; S504, S505, S506) for changing the transmission power (P)
in response to the control command; and a renewing circuit (205, S209; S409; S507) for renewing the
transmission power (P) so that a difference (P a - C) between the
transmission power (P a ) after changed and a reference power (C)
defined in said plurality of base stations in common is r times
as large as a difference (P b - C) between the transmission power
(P b ) before renewed and the reference power (C), namely, P a = r(P b - C) + C, where r represents a coefficient which is not less than zero and
which is less than one, namely, (0 ≦ r < 1).
Claim 36
Dependent Claim
82 words
A base station as claimed in claim 35, wherein the
coefficient r is determined so that a product ( (Pmax - Pmin)(1
- r) ) of a difference (Pmax - Pmin) between a maximum value (Pmax)
and a minimum value (Pmin) in a control range for the transmission
power and another coefficient (1 - r) is less than a changing step
(ΔP) for the transmission power in a case of increasing or
decreasing the transmission power in response to the control
command.
Claim 37
Dependent Claim
201 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21A, 22A) disposed in the respective
cells, and a mobile station (61A; 62A) moving in said cells, said
mobile station carrying out communication with at least one base
station by establishing a channel between said mobile station and
said at least one base station, characterized in that said base
station comprises: a first transmission power controller (203, 205) for
repeatedly carrying out a first transmission power control
operation (S204, S205, s206, s207; S403, S404, S405, S406; S503,
S504, S505, S506) for changing a transmission power (P) in
response to a control command for the transmission power while
said mobile station establishes channels with said plurality of
base stations, the control command being received from said mobile
station; and a second transmission power controller (205) for
repeatedly carrying out a second transmission power control
operation (S209; S409; S507) for renewing the transmission power
(P) so that the transmission powers (P a ) for said plurality of
base stations have less difference and approach a reference power
(C) which is defined in said plurality of base stations in common.
Claim 38
Dependent Claim
215 words
A base station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21A, 22A) disposed in the respective
cells, and a mobile station (61A; 62A) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, characterized in that said
base station comprises: a first transmission power controller (203, 205) for
repeatedly carrying out a first transmission power control
operation (S204, S205, S206, S207; S403, S404, S405, S406; S503,
S504, S505, S506) for changing a transmission power (P) in
response to a control command for the transmission power while
said mobile station (61A) establishes channels with said
plurality of base stations, the control command being received
from said mobile station (61A); and a second transmission power controller (205) for
repeatedly carrying out a second transmission power control
operation (S209; S409; S507) for renewing the transmission power
(P) so that an absolute value of a difference (P - C) between a
reference power (C) in dB defined in said plurality of base
stations in common and the transmission power (P) in dB decreases
at a common rate (r) in said plurality of base stations.
Claim 39
Dependent Claim
25 words
A base station as claimed in any of claims 31 to 38, wherein the
reference power (C) is equal to a maximum transmission power
(Pmax).
Claim 40
Dependent Claim
44 words
A base station as claimed in any of claims 31 to 38, wherein the
reference power (C) is equal to an intermediate power ( (Pmax -
Pmin)/2 ) between a maximum transmission power (Pmax) in dB and
a minimum transmission power (Pmin) in dB.
Claim 41
Dependent Claim
25 words
A base station as claimed in any of claims 31 to 39, wherein the
reference power (C) is equal to a minimum transmission power
(Pmin).
Claim 42
Dependent Claim
207 words
A cellular type mobile communication system
comprising a plurality of cells (11, 12), a plurality of base
stations (21A, 22A) disposed in the respective cells, and a mobile
station (61A; 62A) moving in said cells, said mobile station
carrying out communication with at least one base station by
establishing a channel between said mobile station and said at
least one base station, characterized in that said cellular type
mobile communication system comprises: means (203, 205) for repeatedly carrying out a first
transmission power control operation (S204, S205, s206, s207;
S403, S404, S405, S406; S503, S504, S505, S506) where said mobile
station transmits a control command for the transmission power
to said plurality of base stations while said mobile station
establishes channels with said plurality of base stations and each
of said plurality of base stations receives the control command
to change the transmission power (P) in response to the control
command; and means (205) for repeatedly carrying out a second
transmission power control operation (S209; S409; S507) which
renews the transmission power (P) so that the transmission powers
(P a ) for said plurality of base stations have less difference and
approach a reference power (C) which is defined in said plurality
of base stations in common.
Claim 43
Dependent Claim
230 words
A cellular type mobile communication system
comprising a plurality of cells (11, 12), a plurality of base
stations (21A, 22A) disposed in the respective cells, and a mobile
station (61A; 62A) moving in said cells, said mobile station
carrying out communication with at least one base stations by
establishing a channel between said mobile station and said at
least one base station, characterized in that said cellular type
mobile communication system comprises: means (203, 205) for repeatedly carrying out a first
transmission power control operation (S204, S205, S206, S207;
S403, S404, S405, S406; S503, S504, S505, S506) where said mobile
station (61A) transmits a control command for the transmission
power to each of said plurality of base stations while said mobile
station (61A) establishes channels with said plurality of base
stations and each of said plurality of base stations receives the
control command to change the transmission power (P) in response
to the control command; and means (205) for repeatedly carrying out a second
transmission power control operation (S209; S409; S507) where
each of said plurality of base stations renews the transmission
power (P) so that an absolute value of a difference (P - C) between
a reference power (C) in dB defined in said plurality of base
stations in common and the transmission power (P) in dB decreases
at a common rate (r) in said plurality of base stations.
Claim 44
Dependent Claim
26 words
A cellular type mobile communication system as claimed in
claim 42 or 43, wherein the reference power (C) is equal to
a maximum transmission power (Pmax).
Claim 45
Dependent Claim
45 words
A cellular type mobile communication system as claimed in
claim 42 or 43, wherein the reference power (C) is equal to
an intermediate power ( (Pmax - Pmin)/2 ) between a maximum
transmission power (Pmax) in dB and a minimum transmission power
(Pmin) in dB.
Claim 46
Dependent Claim
26 words
A cellular type mobile communication system as claimed in
claim 42 or 43, wherein the reference power (C) is equal to
a minimum transmission power (Pmin).
Claim 47
Dependent Claim
158 words
A control station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21A, 22A) disposed in the respective
cells, and a mobile station (61A; 62A) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, said control station (71A)
being connected to the plurality of base stations, characterized
in that said control station comprises: receiving means (705), connected to the plurality of base
stations, for receiving statistical values of the transmission
powers from the respective base stations; calculating means (706), connected to said receiving means,
for calculating a reference value indicative of a reference
transmission power using the statistical values; transmitting means (707), connected to said calculating
means and the plurality of base stations, for transmitting the
reference value to the plurality of base stations.
Claim 48
Dependent Claim
161 words
A control station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12),
a plurality of base stations (21, 22) disposed in the respective
cells, and a mobile station (61; 62) moving in said cells, said
mobile station carrying out communication with at least one base
stations by establishing a channel between said mobile station
and said at least one base station, said control station (71A)
being connected to the plurality of base stations, characterized
in that said control station comprises: a receiving section (705), connected to the plurality of
base stations, for receiving statistical values of the
transmission powers from the respective base stations; a calculating section (706), connected to said receiving
section, for calculating a reference value indicative of a
reference transmission power using the statistical values; a transmitting section (707), connected to said
calculating section and the plurality of base stations, for
transmitting the reference value to the plurality of base
stations.
Claim 49
Dependent Claim
27 words
A control station as claimed in claim 47 or 48, wherein
said calculating section (706) calculates, as the reference value,
a maximum one of the statistical values.
Claim 50
Dependent Claim
28 words
A control station as claimed in claim 47 or 48, wherein
said calculating section (706) determines a common rate in
accordance with mutual differences among the statistical values.
Claim 51
Dependent Claim
35 words
A control station as claimed in claim 47 or 48, wherein
said calculating section (706) determines frequency for renewing
the transmission power by a common rate in accordance with mutual
differences among the statistical values.
Claim 52
Dependent Claim
152 words
A mobile station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12) and
a plurality of base stations (21A, 22A) disposed in the respective
cells, said mobile station (62A) moving in said cells and carrying
out communication with at least one base stations by establishing
a channel between said mobile station and said at least one base
station, characterized in that said mobile station comprises: renewing means (614), having an accumulated control value
(A) for a transmission power in said base stations, for renewing
the accumulated control value (A) on transmitting a control
command for the transmission power of the base stations; and transmitting means (606, 610), connected to said renewing
means, for transmitting the accumulated control value (A) to said
plurality of base stations at a time interval (Tint) which is
longer than a repetition time interval of changing operation for
the transmission power.
Claim 53
Dependent Claim
154 words
A mobile station for use in a cellular type mobile
communication system comprising a plurality of cells (11, 12) and
a plurality of base stations (21A, 22A) disposed in the respective
cells, said mobile station (61A) moving in said cells and carrying
out communication with at least one base stations by establishing
a channel between said mobile station and said at least one base
station, characterized in that said mobile station comprises: a renewing unit (614), having an accumulated control value
(A) for a transmission power in said base stations, for renewing
the accumulated control value (A) on transmitting a control
command for the transmission power to the base stations; and a transmitting circuit (606, 610), connected to said
renewing unit, for transmitting the accumulated control value (A)
to said plurality of base stations at a time interval (Tint) which
is longer than a repetition time interval of changing operation
for the transmission power.
Claim 54
Dependent Claim
80 words
A base station as claimed in claim 27, wherein the
coefficient r is determined so that a product ( (Pmax - Pmin)(1
- r) ) of a difference (Pmax - Pmin) between a maximum value (Pmax)
and a minimum value (Pmin) in a control range for the transmission
power and another coefficient (1 - r) is less than a changing step
ΔP for the transmission power in a case of changing the
transmission power in response to the control command.
References Cited (Backward Citations)
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