Results 141 to 150 of about 1,499 (179)

Retransmissions over correlated channels

ACM SIGMETRICS Performance Evaluation Review, 2013
Frequent failures characterize many existing communication networks, e.g. wireless ad-hoc networks, where retransmission- based failure recovery represents a primary approach for successful data delivery. Recent work has shown that retransmissions can cause power law delays and instabilities even if all traffic and network characteristics are super ...
Predrag R. Jelenkovic, Evangelia D. Skiani   +1 more
openaire   +1 more source

MAC layer retransmissions in 1XTREME

The 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2003
We study the joint reliability as offered by the medium access control (MAC) and the radio link protocol (RLP) in CDMA systems, particularly for 1XTREME. The retransmission mechanism in the RLP has considerable amount of delay associated with it which might not be able to sustain real-time communications with strict delay requirements.
Mainak Chatterjee, Giridhar D. Mandyam, Sajal K. Das 0001   +2 more
openaire   +1 more source

Towards Zero Retransmission Overhead: A Symbol Level Network Coding Approach to Retransmission

IEEE Transactions on Mobile Computing, 2011
We present SYNC, a physical layer transmission scheme that drastically reduces the cost of retransmission by introducing network coding concepts to symbol level operation. It piggybacks a new packet on each retransmitted packet, and exploits the previously received packet (possibly with error) at the receiver to recover both the retransmitted packet ...
Sangki Yun, Hyogon Kim, Kun Tan
openaire   +1 more source

Retransmission in distributed media streaming

Proceedings of the 15th International Workshop on Network and Operating Systems Support for Digital Audio and Video, 2005
This paper considers the use of Automatic Request Request (ARQ) schemes in distributed media streaming. We analytically model three different ARQ schemes and derive effective packet loss rate and burst length of these schemes. Our model is verified through simulations and experiments over wide-area network.
Lin Ma, Wei Tsang Ooi
openaire   +1 more source

Bit Rearrangement for MIMO Retransmissions

IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference, 2007
In this paper, we propose a new hybrid automatic repeat request (H-ARQ) scheme in MIMO. The proposed scheme performs bit-level exchanges and modifications every retransmission and covers all combinations of number of antennas and number of retransmissions in M-QAM.
Sung Ho Moon, Hyung Ho Park, Andrea J. Goldsmith, Minseok Oh   +3 more
openaire   +1 more source

An Improved Broadcast Retransmission Protocol

IEEE Transactions on Communications, 1984
A recent paper by Calo and Easton proposes a broadcast protocol for identical file transfers to M different sites wherein a large block of transmitted data is divided into N frames of B bits each, and in a second transmission cycle all frames not acknowledged by all sites are retransmitted.
openaire   +1 more source

Capture and retransmission control in mobile radio

IEEE Journal on Selected Areas in Communications, 1994
We consider the slotted ALOHA protocol with capture, in a mobile communication environment, in the presence of Rayleigh fading and log-normal shadowing. The capture probabilities and their asymptotic value, as the number of colliding packets tends to infinity, are computed.
ZORZI, MICHELE, RAO RR
openaire   +1 more source

Optimizing TCP Retransmission Timeout

2005
Delay spikes on Internet paths can cause spurious TCP timeouts leading to significant throughput degradation. However, if TCP is too slow to detect that a retransmission is necessary, it can stay idle for a long time instead of transmitting. The goal is to find a Retransmission Timeout (RTO) value that balances the throughput degradation between both ...
Alexander Kesselman, Yishay Mansour
openaire   +1 more source

Computing the Retransmission Timeout in CoAP

2013
The most prominent IT trend nowadays is connection of Wireless Sensor Networks (WSNs) with Internet service infrastructure. Interconnection of the millions of sensor and processing devices will create a tremendous traffic increase that can lead to congestion.
Ekaterina Balandina, Yevgeni Koucheryavy, Andrei V. Gurtov   +2 more
openaire   +1 more source

Improvements in Block-Retransmission Schemes

IEEE Transactions on Communications, 1979
Consider the case where an n -digit block encoded word cannot be decoded reliably and a second block of n redundant digits is sent to allow the receiver to make a new try based on the combined information received. Two classes of schemes are proposed and analyzed which give significantly better performance than is obtained by sending a repeat of the ...
openaire   +1 more source