US6697987B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of packet data transfer with hybrid ARQ
Assignee: LG Electronics Inc
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Filing: 2001-07-09
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Granted: 2004-02-24
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Expires: 2021-07-09
Abstract
Abstract A method of transmitting packet data to a receiver in a communication system using a Hybrid ARQ technique is disclosed. In accordance with one illustrative embodiment of the present invention, an index representative of how much the first packet being transmitted such as a signal-to-noise (Eb/No) ratio is compared to a predetermined threshold value when an error is occurred during the step of decoding the packet. If the index is greater than or equal to the threshold value, the first packet transmitted is stored in a buffer and a receiver requests to transmit a second additional packet encoded with a lower code rate. On the other hand, if the index is less than the threshold value, the receiver requests to re-transmit the first packet encoded with the same code rate.
Inventors
- 👤 Young Jo Lee
- 👤 Ki Jun Kim
- 👤 Chan Ho Kyung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:17
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/004; H04L1/0056; H04L1/0067; H04L1/0068; H04L1/0001; H04L1/0009; H04L1/0013; H04L1/16; H04L1/1607; H04L1/1671; H04L1/18; H04L1/1812; H04L1/1816; H04L1/1819; H04L1/1825; H04L1/1829; H04L1/1835; H04L1/1845
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
A method of transmitting packet data to a receiver in a communication system using a Hybrid ARQ technique, the method comprising the steps of: (a) transmitting a first packet encoded with a first code rate to a receiver; (b) decoding said first packet in said receiver if a buffer used in said receiver is empty; (c) comparing an index representative of how much said first packet is damaged to a predetermined threshold value if a first error is occurred during the step (b); (d) storing said first packet in said buffer and requesting to transmit a second additional packet encoded with a second code rate if said index is greater than or equal to said threshold value, said second code rate being lower than said first code rate; and (e) requesting to re-transmit said first packet if said index is less than said threshold value.
Claim 2
Independent Claim
145 words
A method of transmitting packet data to a receiver in a communication system using a Hybrid ARQ technique, the method comprising the steps of: (a) transmitting a first packet encoded with a first code rate to a receiver; (b) decoding said first packet in said receiver if a buffer used in said receiver is empty; (c) comparing an index representative of how much said first packet is damaged to a predetermined threshold value if a first error is occurred during the step (b); (d) storing said first packet in said buffer and requesting to transmit a second additional packet encoded with a second code rate if said index is greater than or equal to said threshold value, said second code rate being lower than said first code rate; and (e) requesting to re-transmit said first packet if said index is less than said threshold value.
Claim 3
Dependent Claim
31 words
The method of claim 1 , further comprising the steps of emptying said buffer and being ready for the next packet transmission if no error is occurred during the step (b).
Claim 4
Dependent Claim
27 words
The method of claim 1 , wherein said first packet is self-decodable if said buffer is empty and is not self-decodable if said buffer is not empty.
Claim 5
Dependent Claim
15 words
The method of claim 1 , wherein said second packet includes an error correction code.
Claim 6
Dependent Claim
18 words
The method of claim 1 , wherein said index is a signal-to-noise (Eb/No) ratio of said first packet.
Claim 7
Dependent Claim
61 words
The method of claim 1 , further comprising the steps of: (f) combining said first packet with an original packet already stored in said buffer and decoding said combined packet if said buffer is not empty; and (g) requesting to transmit said second additional packet encoded with said second code rate if a second error is occurred in the step (f).
Claim 8
Dependent Claim
31 words
The method of claim 6 , further comprising the step of emptying said buffer and being ready for the next packet transmission if no error is occurred during the step (f).
References Cited (Backward Citations)
US5946320A
Cited
US6134694A
Cited
US6126310A
Cited
US5954839A
Cited
US6189123B1
Cited
US6317418B1
Cited
US6353907B1
Cited
US6359877B1
Cited
US6378099B1
Cited
US6308294B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-02-23 | 2007-08-25 | 2008-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-02-23 | 2011-08-25 | 2012-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-02-23 | 2015-08-25 | 2016-02-24 | $7700.00 | Window Closed / Lapsed |