EP0658028A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Retransmission protocol for wireless communications
Assignee: AT&T Inc
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Filing: 1994-11-23
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Granted: —
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Expires: 2014-11-23
Abstract
Abstract The throughput of a radio transmission link is enhanced by arranging a transmitter of data packets so that it responds to the transmission window closing by repeatedly retransmitting all unacknowledged data packets and doing so until the window reopens or a receiver status message acknowledges receipt of a retransmitted data packet.
Inventors
- 👤 Richard Paul Ejzak
- 👤 Sanjiv Nanda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 07:23
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/12; H04L1/16; H04L1/1607; H04L1/1664; H04L1/1614; H04L1/1628; H04L1/18; H04L1/1829; H04L1/1832; H04L9/00; H04L9/40; H04L1/1835; H04L1/1867; H04L1/1874; H04L69/00; H04L69/30; H04L69/32; H04L69/322; H04L69/324
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A data packet retransmission arrangement for use in a communications system comprising means for transmitting data packets to a receiver and associating said transmitted data packets with respective transmit order numbers as they are transmitted, means, responsive to receipt of a status message identifying the transmitted data packets that were received correctly and incorrectly by said receiver, for retransmitting only those of said incorrectly received data packets whose associated transmit order numbers precede a transmit order number associated with a transmitted data packet identified in said message as being the last of the correctly received data packets, and CHARACTERIZED BY means, operative whenever a window for transmitting data packets closes, for retransmitting, in turn, data packets that have been received incorrectly by said receiver when said window was open and repeating the retransmission of each such data packet until either said window opens for the transmitting of data packets or receipt of a status message indicates that the data packet was received correctly.
Claim 2
Dependent Claim
86 words
The data packet retransmission arrangement set forth in claim 1 FURTHER CHARACTERIZED IN THAT said status message is a full status message comprising at least a bit map field, a field identifying the last data packet correctly received and a field identifying the last data packet correctly received in proper sequence, said bit map field being formed from a number of bits associated with respective sequence numbers that are appended to respective ones of said data packets in the order that said data packets are transmitted.
Claim 3
Dependent Claim
95 words
The data packet retransmission arrangement set forth in claim 1 FURTHER CHARACTERIZED IN THAT said status message is a partial status message inserted in a user information packet, said partial status message comprising at least (a) a bit map field formed from a group of bits associated with a group of respective sequence numbers assigned to respective ones of a group of data packets in the order that said group of data packets are transmitted and (b) a group number defining a relationship between said group of sequence numbers and another group of sequence numbers.
Claim 4
Dependent Claim
33 words
The data packet retransmission arrangement set forth in claim 3 FURTHER CHARACTERIZED IN THAT said partial status message further comprises a field identifying the last data packet received correctly and in proper sequence.
Claim 5
Dependent Claim
22 words
The data packet retransmission arrangement set forth in claim 1 FURTHER CHARACTERIZED IN THAT said communications system is a wireless telephone system.
References Cited (Backward Citations)
No citation records indexed.
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