EP0986282A1
Expired / Lapsed
EP
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Radio communication device and method of controlling transmission rate
Assignee: Panasonic Holdings Corp
•
Filing: 1999-04-19
•
Granted: —
•
Expires: 2019-04-19
Abstract
Abstract The communication terminal apparatus measures reception quality and reports the measurement result to the base station apparatus, and the base station apparatus switches the transmission rate based on the reported result of the reception quality. In this way, the transmission rate is switched starting at the point in time at which the reception quality of the communication terminal apparatus deteriorates. Furthermore, the transmission rate is switched so that the amount of interference with others is within the allowable range according to the channel condition between the communication terminal apparatus and base station apparatus.
Inventors
- 👤 Toyoki Ue
- 👤 Katsuhiko Hiramatsu
- 👤 Osamu Kato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 08:37
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0002; H04L1/0003; H04W; H04W28/00; H04W28/16; H04W28/18; H04W28/22; H04W52/00; H04W52/04; H04W52/18; H04W52/24; H04W52/26; H04W52/265; H04W52/267; H04W72/00; H04W72/50; H04W72/54; H04W72/542; H04L1/0023; H04L1/0025; H04L1/0026; H04W16/00; H04W16/14; H04W24/00; H04W72/20; H04W72/21
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
42 words
A radio communication apparatus comprising: transmission rate switching means for switching a
transmission rate of a transmission signal based on
reception quality information from the other end of
communication; and transmission means for transmitting a transmission
signal at the switched transmission rate.
Claim 2
Dependent Claim
36 words
The radio communication apparatus according to
claim 1, wherein the transmission rate switching means
selects a 1/2 transmission rate when the reception
quality measurement result of the reception quality
information is smaller than a first threshold.
Claim 3
Dependent Claim
48 words
The radio communication apparatus according to
claim 1, wherein the transmission rate switching means
selects a transmission rate at which the reception
quality measurement result becomes greater than the
first threshold when the reception quality measurement
result of the reception quality information is smaller
than the first threshold.
Claim 4
Dependent Claim
38 words
The radio communication apparatus according to
claim 3, wherein the transmission rate switching means
selects a double transmission rate when the reception
quality measurement result is greater than a second
threshold which is greater than said first threshold.
Claim 5
Dependent Claim
43 words
The radio communication apparatus according to
claim 1, wherein the transmission rate switching means
selects a transmission rate that meets the reception
quality of the reception quality measurement result in
the reception quality information and at the same time
allows the fastest transmission.
Claim 6
Dependent Claim
65 words
A radio communication apparatus comprising: reception quality estimation means for estimating
the reception quality of the other end of communication
based on transmission power control information of said
other end of communication; transmission rate switching means for switching
the transmission rate of a transmission signal based on
this reception quality estimation result; and transmission means for transmitting the
transmission signal at the switched transmission rate.
Claim 7
Dependent Claim
47 words
The radio communication apparatus according to
claim 6, wherein the reception quality estimation means
estimates the reception quality by accumulating the
transmission power control information and the
transmission rate switching means selects a 1/2
transmission rate when the reception quality estimation
result is smaller than a threshold.
Claim 8
Dependent Claim
58 words
The radio communication apparatus according to
claim 6, wherein the reception quality estimation means
estimates the reception quality by accumulating the
transmission power control information and the
transmission rate switching means selects a transmission
rate at which the reception quality becomes greater than
the first threshold when the reception quality
estimation result is smaller than the first threshold.
Claim 9
Dependent Claim
55 words
The radio communication apparatus according to
claim 8, wherein the reception quality estimation means
estimates the reception quality by accumulating the
transmission power control signal and the transmission
rate switching means selects a double transmission rate
when the reception quality estimation result is greater
than a second threshold which is greater than the first
threshold.
Claim 10
Dependent Claim
55 words
The radio communication apparatus according to
claim 6, wherein the reception quality estimation means
estimates the reception quality by accumulating the
transmission power control signal and the transmission
rate switching means selects a transmission rate that
meets the reception quality of the reception quality
estimation result and at the same time allows the fastest
transmission.
Claim 11
Dependent Claim
43 words
A radio communication apparatus comprising: transmission rate switching means for switching a
transmission rate of a transmission signal based on
transmission power control information from the other
end of communication; and transmission means for transmitting the
transmission signal at the switched transmission rate.
Claim 12
Dependent Claim
34 words
The radio communication apparatus according to
claim 11, wherein the transmission rate switching means
selects a 1/2 transmission rate when the transmission
power in the transmission power control information is
greater than a threshold.
Claim 13
Dependent Claim
45 words
The radio communication apparatus according to
claim 11, wherein the transmission rate switching means
selects a transmission rate at which the transmission
power becomes smaller than a first threshold when the
transmission power in the transmission power control
information is greater than the first threshold.
Claim 14
Dependent Claim
36 words
The radio communication apparatus according to
claim 13, wherein the transmission rate switching means
selects a double transmission rate when the transmission
power is smaller than a second threshold which is smaller
than said first threshold.
Claim 15
Dependent Claim
34 words
The radio communication apparatus according to
claim 11, wherein the transmission rate switching means
switches the transmission rate so that the transmission
power in the transmission power control information is
within a predetermined range.
Claim 16
Dependent Claim
20 words
The radio communication apparatus according to
claim 2, wherein the threshold is set according to the
transmission rate in communication.
Claim 17
Dependent Claim
22 words
The radio communication apparatus according to
claim 2, using a CDMA communication system and setting
a threshold according to the spreading factor.
Claim 18
Dependent Claim
24 words
The radio communication apparatus according to
claim 2, using a CDMA communication system and setting
a threshold according to the number of multiplexing
codes.
Claim 19
Dependent Claim
50 words
A radio communication system comprising: a first radio communication apparatus comprising
reception quality measuring means for measuring
reception quality and transmission means for
transmitting information including this reception
quality; and a second radio communication apparatus comprising
transmission rate switching means for switching a
transmission rate based on said reception quality.
Claim 20
Dependent Claim
37 words
The radio communication system according to
claim 19, wherein the second radio communication
apparatus comprises transmission power control means for
controlling the transmission power of the first radio
communication apparatus based on the reception quality
measurement result.
Claim 21
Dependent Claim
43 words
The radio communication system according to
claim 20, wherein the first radio communication
apparatus comprises reception quality estimation means
for estimating the reception quality of said other end
of communication based on the transmission power control
information from the second radio communication
apparatus.
Claim 22
Dependent Claim
25 words
The radio communication system according to
claim 19, wherein the first radio communication
apparatus transmits information to the second radio
communication apparatus all the time.
Claim 23
Dependent Claim
25 words
The radio communication system according to
claim 19, wherein the first radio communication
apparatus transmits information to the second radio
communication apparatus only when required.
Claim 24
Dependent Claim
30 words
The radio communication system according to
claim 23, wherein the second radio communication
apparatus switches the transmission rate when the
reception quality measured by the first radio
communication apparatus deteriorates.
Claim 25
Dependent Claim
38 words
The radio communication system according to
claim 23, wherein, when the reception quality of the
second radio communication apparatus deteriorates, the
second radio communication apparatus requests the first
radio communication apparatus to send information
including the reception quality.
Claim 26
Dependent Claim
61 words
The radio communication system according to
claim 23, wherein the first radio communication
apparatus requests the second radio communication
apparatus to resend the information including the
reception quality when the reception signal contains an
error and the second radio communication apparatus, upon
reception of the resend request, requests the first radio
communication apparatus to send the information
including the reception quality.
Claim 27
Dependent Claim
39 words
The radio communication system according to
claim 19, wherein the transmission rate switching means
switches the transmission rate when the transmission
rate switching means receives a report that the
transmission power is excessive from the second radio
communication apparatus.
Claim 28
Dependent Claim
86 words
A transmission rate control method comprising
the steps of: comparing allowable transmission power set in a
first layer with average transmission power obtained in
a second layer, which is lower than said first layer; indicating a change or no change in a transmission
rate in said second layer according to said comparison
result; and changing the transmission rate in a third layer
which is higher than said second layer and lower than
said first layer according to a change or no change in
said transmission rate.
Claim 29
Dependent Claim
32 words
The transmission rate control method according
to claim 28, wherein said first layer is instructed to
lower the transmission rate when said average
transmission power is greater than said allowable
transmission power.
Claim 30
Dependent Claim
38 words
The transmission rate control method according
to claim 28, wherein said first layer is instructed to
increase the transmission rate when said average
transmission power is smaller than said allowable
transmission power by a predetermined amount or more.
References Cited (Backward Citations)
No citation records indexed.
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