US6163577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Source/channel encoding mode control method and apparatus
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1997-04-25
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Granted: 2000-12-19
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Expires: 2017-04-25
Abstract
Abstract A source/channel encoding mode control method in a TDMA radio communication system determines the current type of source signal to be encoded and transmitted, restricts encoding to a class of source/channel encoding modes compatible with the determined type of source signal, determines a quality measure for previously transmitted signals that have been received and decoded, and selects based on the quality measure, the most suitable source/channel encoding mode for the determined class.
Inventors
- 👤 Erik Ekudden
- 👤 Jim Sundqvist
- 👤 Tor Bjorn Minde
- 👤 Karl Hellwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:18
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/18; H04W52/26; H04W52/265; H04L; H04L1/00; H04L1/0001; H04L1/0009; H04L1/0014; H04L1/0023; H04L1/0032; H04L1/0036; H04L1/0038; H04W52/267; H04L1/0025; H04L1/004; H04L1/0056; H04L1/007; H04W24/00; H04W24/10; H04W28/00; H04W28/16; H04W28/18; H04W28/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
130 words
A source/channel encoding mode control method in a digital radio communication system having a radio link from a transmitter to a receiver, comprising the steps of: determining a current type of source signal to be encoded and transmitted on the radio link; restricting encoding to a class of source/channel encoding modes compatible with the determined type of source signal, each mode in the class being defined by a different mix of source signal encoding and channel protection but the same total available gross bit rate; determining a quality measure for previously transmitted signals that have been received and decoded at the receiver; and selecting, based on the quality measure, a source/channel encoding mode from the class that is likely to give the best received and decoded signal at the receiver.
Claim 2
Dependent Claim
130 words
A source/channel encoding mode control method in a digital radio communication system having a radio link from a transmitter to a receiver, comprising the steps of: determining a current type of source signal to be encoded and transmitted on the radio link; restricting encoding to a class of source/channel encoding modes compatible with the determined type of source signal, each mode in the class being defined by a different mix of source signal encoding and channel protection but the same total available gross bit rate; determining a quality measure for previously transmitted signals that have been received and decoded at the receiver; and selecting, based on the quality measure, a source/channel encoding mode from the class that is likely to give the best received and decoded signal at the receiver.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein the same steps are performed for signals transmitted on a return radio link from a receiver side to a transmitter side.
Claim 4
Dependent Claim
54 words
The method of claim 2, comprising the steps of: determining the quality measure at the receiver; and selecting, whenever available, a source/channel encoding mode in the receiver that also leaves room, within the total available gross bit rate, for an inband control channel for transmission of the quality measure on the return radio link.
Claim 5
Dependent Claim
24 words
The method of claim 1, comprising the step of trial decoding received signals in several decoding modes and selecting the most likely decoding mode.
Claim 6
Dependent Claim
22 words
The method of claim 1, wherein a mode indicator is included in the transmitted signal to indicate the selected source/channel encoding mode.
Claim 7
Dependent Claim
22 words
The method of claim 4, comprising the step of restricting the mode selection to a subset of all allowable source/channel encoding modes.
Claim 8
Dependent Claim
24 words
The method of claim 6, wherein only nearest neighbor modes, in terms of offered channel protection, of a current source/channel encoding mode are allowed.
Claim 9
Dependent Claim
29 words
The method of claim 1, comprising the step of activating a frame stealing control channel only if the determined type of source signal to be encoded allows such activation.
Claim 10
Dependent Claim
30 words
The method of claim 1, comprising the step of delaying activation of a frame stealing control channel until the determined type of source signal to be encoded allows such activation.
Claim 11
Dependent Claim
20 words
The method of claim 2, wherein independent source/channel encoding is used on the radio link and the return radio link.
Claim 12
Dependent Claim
135 words
A source/channel encoding mode control apparatus in a digital radio communication system having a radio link from a transmitter to a receiver, comprising: means for determining a current type of source signal to be encoded and transmitted on the radio link; means for restricting encoding to a class of source/channel encoding modes compatible with the determined type of source signal, each mode in the class being defined by a different mix of source signal encoding and channel protection but the same total available gross bit rate, means for determining a quality measure for previously transmitted signals that have been received and decoded at the receiver; and means for selecting, based on the quality measure, a source/channel encoding mode from the class that is likely to give the best received and decoded signal at the receiver.
Claim 13
Dependent Claim
135 words
A source/channel encoding mode control apparatus in a digital radio communication system having a radio link from a transmitter to a receiver, comprising: means for determining a current type of source signal to be encoded and transmitted on the radio link; means for restricting encoding to a class of source/channel encoding modes compatible with the determined type of source signal, each mode in the class being defined by a different mix of source signal encoding and channel protection but the same total available gross bit rate, means for determining a quality measure for previously transmitted signals that have been received and decoded at the receiver; and means for selecting, based on the quality measure, a source/channel encoding mode from the class that is likely to give the best received and decoded signal at the receiver.
References Cited (Backward Citations)
US4184049A
Cited
EP0631402A2
Cited
US5416779A
Cited
US5353373A
Cited
US5469527A
Cited
WO1994007313A1
Cited
WO1994019882A1
Cited
US5666370A
Cited
WO1997013388A1
Cited
US5701294A
Cited
US5982766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-12-19 | 2004-06-19 | 2004-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-12-19 | 2008-06-19 | 2008-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-12-19 | 2012-06-19 | 2012-12-19 | $7700.00 | Window Closed / Lapsed |