Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2000-05-17
2003-04-29
Ton, David (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S750000
Reexamination Certificate
active
06557135
ABSTRACT:
TECHNICAL FIELD
This invention relates generally to telecommunications and more particularly to transmission of segmented bitmaps.
BACKGROUND OF THE INVENTION
Enhanced General Packet Radio Service (EGPRS) uses bitmaps to provide automatic repeat request (ARQ) feedback to a transmitting device component. The bitmaps represent a receipt status (e.g. Acknowledgment/Negative Acknowledgement or Ack/Nack status) of individual Radio Link Control (RLC) data blocks that are sent from a transmitting device to a receiving device in groups that comprise a transmission window. When the receiving device receives a number of blocks correctly and receives a number of blocks incorrectly, then the receiving device sends to the transmitting device a bitmap composed of both “1”s and “0”s. Hence, through bitmap feedback, the receiving device requests that the transmitting device to re-transmit specific blocks.
Because bitmaps associated with high-speed links are too large for the receiving device to send in a single transmission, the bitmaps are typically segmented. So, the receiving device usually executes the ARQ by sending the bitmap only one segment at a time. In one approach, the feedback is truncated(for example, when a first segment of the bitmap that corresponds to the beginning data blocks of the transmission is sent repeatedly). Such an approach undesirably delays the transmitting device in receiving bitmap feedback concerning those data blocks of the transmission that are transmitted subsequent to the beginning blocks of the transmission window. The approach suffers from an inefficiency of the transmitting device not receiving early feedback that represents a more current received state of all the data blocks of the transmission.
Therefore, a need exists for enhanced reporting of the current received state of all data blocks of a transmission that uses a transmission window multiple times.
SUMMARY OF THE INVENTION
Pursuant to the present invention, shortcomings of the existing art are overcome and additional advantages are provided through the provision of cycling through an entirety of error-indicating acknowledgment information.
The invention in one embodiment encompasses a method. The method determines a plurality of portions that comprise an entirety of error-indicating acknowledgement information. The plurality of portions that comprise the entirety of the error-indicating acknowledgement information are cycled through to send the error-indicating acknowledgement information.
Another embodiment of the invention encompasses a system. The system includes a generator component that determines a plurality of portions that comprise an entirety of error-indicating acknowledgement information. The system includes a generator component that cycles through the plurality of portions that comprise the entirety of the error-indicating acknowledgement information to send the error-indicating acknowledgement information.
A further embodiment of the invention encompasses an article. The article includes a computer-readable signal-bearing medium. The article includes means in the medium for determining a plurality of portions that comprise an entirety of error-indicating acknowledgement information. The article includes means in means in the medium for cycling through the plurality of portions that comprise the entirety of the error-indicating acknowledgement information to send the error-indicating acknowledgement information.
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Krishna Balachandran, Richard P. Ejzak, Sanjiv Nanda, “Efficient Transmission of ARQ Feedback,” Dec. 1998, 4 pages.
Krishna Balachandran, Richard P. Ejzak, Sanjiv Nanda, “Efficient Transmission of ARQ Feedback,” Jan. 1999, pp. 1-6, Lucent Technologies, ETSI SMG 2 WPA/WPB Meeting, TDoc SMG2 WPA 150/99 (2A99-150), TDoc SMG2 WPB 112/99 (2A99-112).
Krishna Balachandran, Richard P. Ejzak, Sanjiv Nanda, “EGPRS RLC Performance with Efficient Transmission of ARQ Feedback Through Segmented Bitmaps,” Apr. 12, 1999, pp. 1-6, Lucent Technologies, ETSI SMG2 WPA, SMG2 Edge TDOC 2A99-403, Dublin, Ireland.
Krishna Balachandran, Richard P. Ejzak, Sanjiv Nanda, “Efficient Transmission of ARQ Feedback in EGPRS Through Segmented Bitmaps,” May 17, 1999, pp. 1-9, Lucent Technologies, ETSI AMG2 Working Session on EDGE, Tdoc 2E99-126, Agenda item 6.2, Bois D'Arcy, France.
Krishna Balachandran, Richard P. Ejzak, Sanjiv Nanda, “Efficient Transmission of ARQ Feedback for EGPRS Radio Link Control,” Sep. 1999, pp. 1-8.
Balachandran Krishna
Ejzak Richard P.
Nanda Sanjiv
Lucent Technologies - Inc.
Patti & Brill LLC
Ton David
LandOfFree
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