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Rx-end Assisted Ack/Nack Message transmission to enhance Capacity and QoS in selective ARQ based packet data systems Disclosure Number: IPCOM000005033D
Original Publication Date: 2001-Jul-24
Included in the Prior Art Database: 2001-Jul-24

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Davood Molkdar Walter Featherstone


The paper describes a technique that reduces the probability of stalling the transmit-window and maintains the frequency of receiving channel estimates in systems employing automatic repeat request (ARQ) and/or a Link Adaptation (LA) mechanism. The technique proposed also minimises the time period for which the system is stalled should the stall condition occur. To illustrate the problem and solution, GPRS/EGPRS (General Packet Radio System / Enhanced GPRS) RLC protocol is used; the technique is, however, equally applicable to other ARQ multi-code rate systems employing similar type of protocol and LA mechanism