Patent US3026241A successfully refreshed from Google Patents.
EP0964540A2
Expired / Lapsed
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System for dynamic adaptation of data channel coding in wireless communications
Assignee: Texas Instruments Inc
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Filing: 1999-05-20
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Granted: —
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Expires: 2019-05-20
Abstract
Abstract A system for dynamic adaptation of wireless communication between a Mobile Station (11) and a Base Station (13) wherein the transmitted frame from the Mobile Station includes a convolutionally coded portion containing a down-link measurement bit and a repetition code identifying the codec mode of the frame. The transmitted frame from the Base Station (13) includes a codec mode command signal for the Mobile Station (11) in the convolutionally encoded portion and the repetition code identify the codec mode of the down-link frame. The Base Station (13) includes means for analyzing the quality of the up-link frame and means from the received down-link measurement bit for determining the down-link quality. <IMAGE>
Inventors
- 👤 Krisnasamy Anandakumar
- 👤 Jual-Carlos Demartin
- 👤 Alan V. Mccree
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:17
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0023; H04L1/0026; H04L1/0002; H04L1/0009; H04L1/0015; H04L1/0025; H04L1/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
A communications system comprising: a first station for communicating to a second station and
said second station for communicating to a first station, and
means for monitoring the quality of the communications between
said first station and said second station and for adapting data
and error control rates based on said quality.
Claim 2
Dependent Claim
27 words
The system of Claim 1 wherein said first station is a
mobile station and said second station is a base station in a
cellular or microcellular system.
Claim 3
Dependent Claim
21 words
The system of Claim 2 wherein carrier to interference is
monitored and codec mode selection follows the carrier to
interference ratio.
Claim 4
Dependent Claim
32 words
The system of Claim 3 wherein said carrier to
interference monitoring is based on an average of the received
soft bit values over a frame and a moving average over several
frames.
Claim 5
Dependent Claim
52 words
The system of Claim 4 wherein the codec mode decision
is at the base station and down-link measurement information is
sent in-band via the up-link from the mobile station to the base
station and codec mode command information is sent in-band via
the down-link from the base station to the mobile station.
Claim 6
Dependent Claim
25 words
The system of Claim 5 wherein the measurement
information and the codec command information is in the Class 0
protection coding portion of the frame.
Claim 7
Dependent Claim
46 words
A communication system comprising: a first station and a second station adapted to transmit
and receive a communication signal frame containing data and
error control from each other; said frame including a header
with a unanimously decoded repetition code identifying the mode
of the transmitted frame.
Claim 8
Dependent Claim
32 words
The communication system of Claim 7 including a
monitor for identifying the quality of communications between
said first and second station and a mode selector changing said
mode based on said quality.
Claim 9
Dependent Claim
28 words
The system of Claim 8 wherein said first station is a
mobile station and said second station is a base station and
said mode is the codec mode.
Claim 10
Dependent Claim
23 words
The system of Claim 9 wherein said frame contains also
separate codec beacon information identifying said codec mode to
guarantee mode switching robustness.
Claim 11
Dependent Claim
85 words
A wireless communication system comprising: a Mobile Station and a Base Station adapted to transmit
and receive a communication signal frame containing data and
error control from each other; said frame including a header
with a unanimous repetition code identifying the codec mode of
the transmitted frame and a convolution encoded subset including
speech coding with different level coding and parity; said
Mobile Station and said Base Station including a unanimous bit
decoder for identifying the codec mode of the header with the
repetition code.
Claim 12
Dependent Claim
48 words
The communication system of Claim 11 wherein said
Mobile Station includes means for measuring the quality of the
received frame for providing a measurement signal identifying
the quality of down link signal from the Base Station and means
for sending that measurement signal in the convolution encoded
subset.
Claim 13
Dependent Claim
65 words
The communication system of Claim 11 wherein said Base
Station includes means responsive to said measurement signal for
averaging the soft values over a frame and over several frames
to determine the codec mode for said down link and said base
station transmits a codec command mode representing said
determined codec mode to said Mobile Station in said
convolutionally encoded subset of said down-link frame.
Claim 14
Dependent Claim
43 words
The communication system of Claim 13 wherein said Base
Station in response to up-link frame measures said quality of
said up-link frame by measuring the soft values over a frame and
over several frames to determine the codec mode for the up-link
frame.
References Cited (Backward Citations)
No citation records indexed.
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