EP0893889A2
Expired / Lapsed
EP
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Method and apparatus for transmission power control in a CDMA communication system
Assignee: Panasonic Holdings Corp
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Filing: 1998-04-28
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Granted: —
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Expires: 2018-04-28
Abstract
Abstract Pilot symbol 1021 of the first slot and TPC symbol 1022 thereof are transmitted by the same transmission power as that one the commencement of transmission, and the transmission power of data symbol 1023 is made zero. In slots including and after the second slot, pilot symbol 1031 and TPC symbol 1032 are transmitted at the same position as that on the commencement of transmission and by smaller transmission power than that on the commencement of transmission, and further dummy signal 1033 is transmitted, as in the above, by the same transmission power after TPC. <IMAGE>
Inventors
- 👤 Mitsuru Uesugi
- 👤 Kazuyuki Kiya
- 👤 Osamu Kato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 09:13
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/26; H04W52/265; H04W52/267; H04W52/30; H04W52/32; H04W52/325; H04W52/54; H04W52/58; H04W52/60
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
83 words
A CDMA communication apparatus comprising; rate judging means for judging a transmission data rate
in the first slot of a transmission frame; level controlling means(1113,1114) for carrying out
a process by which the transmission power of transmission
controlling information given to the top of each slot in
slots including and after the second slot is made identical
to a transmission power of transmission data; and transmitting means for transmitting said frame
processed by uniform transmission power in response to said
rate judging means.
Claim 2
Dependent Claim
36 words
The CDMA communication apparatus according to
claim 1, wherein said level controlling means is provided
with multiplexing means(1103) for multiplexing a dummy
signal onto the transmission frame in a case where no
transmission data is given.
Claim 3
Dependent Claim
71 words
A CDMA communication apparatus comprising; rate judging means for judging a transmission data rate
in the first slot of a transmission frame; spread controlling means(1101) for spreading
transmission controlling information, which constitutes the
respective slots including and after the second slot, and
transmission data to the entirety of slot; and transmitting means for transmitting a frame composed
of said slots spread by uniform transmission power in
response to said judging result.
Claim 4
Dependent Claim
31 words
The CDMA communication apparatus according to
claim 3, wherein said spread controlling means(1101) spreads
transmission controlling information to the entirety of slot
in a case where no transmission data is given.
Claim 5
Dependent Claim
60 words
The CDMA communication apparatus according claim
3, wherein said transmitting means transmits transmission
controlling information and transmission data by the first
slot in compliance with the result of judgement by said rate
judgement means in a case where the transmission data rate
is low and controls so as to cut off the transmission
immediately after said transmission data is transmitted.
Claim 6
Dependent Claim
95 words
The CDMA communication apparatus according to
claim 3, further comprising; rate change judging means for judging whether or not
a transmission data rate is changed; and transmission controlling means which, if the rate is
not changed, transmits transmission controlling information
of the first slot of a next frame by the same transmission
power as that of the frame being transmitted, and which if
the rate is changed, transmits transmission control
information of the next first slot by the same transmission
power as that on the commencement of transmission, in
compliance with the result of judgement.
Claim 7
Dependent Claim
40 words
The CDMA communication apparatus according to
claim 6, wherein said transmission controlling means
transmits, at random, transmission controlling information
of the first slot of transmission frame in a case where
transmission is continuously carried out by the same
transmission power.
Claim 8
Dependent Claim
22 words
The CDMA communication apparatus according to
claim 1, wherein said transmission controlling information
includes a pilot symbol and a power controlling signal.
Claim 9
Dependent Claim
64 words
The CDMA communication apparatus according to
claim 1, wherein, in compliance with the result of judgement,
if no transmission data is given, transmission controlling
information of the first slot and specified pattern data
thereof are transmitted by the same transmission power, and
if the transmission data rate is low, the transmission data
is repeatedly transmitted while transmitting the
transmission controlling information and transmission data.
Claim 10
Dependent Claim
41 words
A CDMA communication apparatus comprising: multiplexing means(1103) for constituting a frame by
multiplexing transmission controlling information and
transmission data; spread means for spreading the transmission
controlling information and transmission data by different
codes; and transmission means for transmitting said processed
frame.
Claim 11
Dependent Claim
22 words
The CDMA communication apparatus according to
claim 1, wherein said multiplexing means(1103) constitutes
transmission controlling information by patterns
constituted with different phases.
Claim 12
Dependent Claim
28 words
The CDMA communication apparatus according to
claim 10, further comprising; transmission power controlling means for controlling
transmission power of transmission controlling information
in response to a transmission rate.
Claim 13
Dependent Claim
23 words
The CDMA communication apparatus according to
claim 10, wherein said multiplexing means(1103) gives
transmission controlling information to the top slot of
transmission data.
Claim 14
Dependent Claim
88 words
A mobile station having a communication apparatus,
said apparatus comprising; rate judging means for judging a transmission data rate
in the first slot of a transmission frame; level controlling means(1113,1114) for carrying out
a process by which the transmission power of transmission
controlling information given to the top of each slot in
slots including and after the second slot is made identical
to a transmission power of transmission data; and transmitting means for transmitting said frame
processed by uniform transmission power in response to said
rate judging means.
Claim 15
Dependent Claim
88 words
A base station having a communication apparatus,
said apparatus comprising; rate judging means for judging a transmission data rate
in the first slot of a transmission frame; level controlling means(1113,1114) for carrying out
a process by which the transmission power of transmission
controlling information given to the top of each slot in
slots including and after the second slot is made identical
to a transmission power of transmission data; and transmitting means for transmitting said frame
processed by uniform transmission power in response to said
rate judging means.
Claim 16
Dependent Claim
30 words
A CDMA communication system comprising: a mobile station having a CDMA communication apparatus
according to claim 14; and a base station having a CDMA communication apparatus
according to claim 15.
Claim 17
Dependent Claim
52 words
A CDMA communication method comprising the steps
of: judging a rate of transmission data by the first slot
of transmission frame; and transmitting transmission controlling information and
transmission data, which are transmitted by slots including
and after the second slot, by uniform transmission power in
response to the result of said judgement.
Claim 18
Dependent Claim
72 words
The CDMA communication method according to claim
17, wherein, in compliance with the result of judgement, if
no transmission data is given, only the transmission
controlling information is transmitted, transmission
controlling information to be transmitted by slots including
and after the second slot is transmitted by smaller
transmission power than the transmission power of the first
slot, and a dummy signal is transmitted by the same
transmission power as said transmission power.
Claim 19
Dependent Claim
69 words
The CDMA communication method according to claim
17, wherein, in compliance with the result of judgement, if
the transmission data rate is low, transmission controlling
information and transmission data are transmitted by the
first slot, and they are transmitted by slots including and
after the second slot so that the sum of symbol lengths of
the transmission controlling information and transmission
data is made equal to a slot length.
Claim 20
Dependent Claim
58 words
The CDMA communication method according to claim
17, wherein, in compliance with the result of judgement, if
the transmission data rate is low, transmission controlling
information and transmission data are transmitted by the
same transmission power by the first slot, and the
transmission is brought to an end immediately after the
transmission of said transmission data is finished.
Claim 21
Dependent Claim
57 words
The CDMA communication method according to claim
17, wherein, in compliance with the result of judgement, if
no transmission data is given, only the transmission
controlling information is transmitted by the first slot,
and transmission controlling information to be transmitted
by slots including and after the second slot are spread to
the entirety of slot for transmission.
Claim 22
Dependent Claim
59 words
The CDMA communication method according to claim
17, wherein, in compliance with the result of judgement, if
the transmission data rate is low, transmission controlling
information and transmission data are transmitted by the
first slot, and transmission controlling information and
transmission data are spread to the entirety of slot in slots
including and after the second slot for transmission.
Claim 23
Dependent Claim
40 words
The CDMA communication method according to claim
17, wherein, in compliance with the result of judgement, if
no transmission data is given, transmission controlling
information and specified pattern data are transmitted by
the first slot by the same transmission power.
Claim 24
Dependent Claim
44 words
The CDMA communication method according to claim
17, wherein, in compliance with the result of judgement, if
the transmission data rate is low, transmission controlling
information and specified pattern data are transmitted by
the first slot, and the same transmission data is repeatedly
transmitted.
Claim 25
Dependent Claim
74 words
The CDMA communication method according to claim
17, wherein it is judged whether or not the transmission data
rate is changed, if not changed, transmission controlling
information of the first slot of a next frame is transmitted
by the same transmission power as that of the frame being
transmitted, and if changed, transmission controlling
information of the next first slot is transmitted by the same
transmission power as that on the commencement of
transmission.
Claim 26
Dependent Claim
49 words
The CDMA communication method according to claim
25, wherein in a case where transmission is continuously
carried out by the same transmission power, transmission
controlling information of the first slot of transmission
frame is transmitted, at random, by the same transmission
power as that on the commencement of transmission.
Claim 27
Dependent Claim
22 words
The CDMA communication method according to claim
17, wherein said transmission controlling information
includes a pilot symbol and a power controlling signal.
Claim 28
Dependent Claim
34 words
A CDMA communication method comprising the steps
of: constituting a frame by multiplexing transmission
controlling information and transmission data; spreading transmission controlling information and
transmission data by different codes; and transmitting said processed frame.
Claim 29
Dependent Claim
20 words
The CDMA communication method according to claim
28, wherein transmission controlling information is
constituted by patterns constituted with different phases.
Claim 30
Dependent Claim
23 words
The CDMA communication method according to claim
28, wherein the transmission power of transmission
controlling information is controlled in response to
transmission rate.
Claim 31
Dependent Claim
21 words
The CDMA communication method according to claim
28, wherein transmission controlling information is given
to the top slot of transmission data.
References Cited (Backward Citations)
No citation records indexed.
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