A Hybrid Automatic Repeat reQuest (HARQ), error control scheme based on a convolutional code for packet transmission over wireless channels was proposed. The analysis of the throughput and bit-error rate (BER) performance, according to the different constraint lengths (K=3 and K=4) and code rate (1/2 and 1/3) of convolutional codes on HARQ type I simulation scheme are presented. Certain error c...

Real-time interactive video transmission in the current Internet has mediocre quality because of high packet loss rates. Loss of packets belonging to a video frame manifests itself not only in the reduced quality of that frame but also in the propagation of that distortion to successive frames. This error propagation problem is inherent in any motion-based video codec because of the interdepend...

Real-time interactive video transmission in the current Internet has mediocre quality because of high packet loss rates. Loss of packets belonging to a video frame manifests itself not only in the reduced quality of that frame but also in the propagation of that distortion to successive frames. This error propagation problem is inherent in any motion-based video codec because of the interdepend...

In this paper, we propose an orthogonal frequency division multiplexing (OFDM) based underwater acoustic multimedia system. An essential feature of this system is that it offers larger power and schemes providing significant error protection for the transmission sensor data information that requires higher quality of service (QoS). To realize maximum resource utilization, or minimum total trans...

We consider a hybrid automatic repeat-request (ARQ) scheme employing different space-time trellis codes. In general, most design criteria for space-time trellis codes focus on minimizing the maximum pairwise error probability. However, in slow fading channels, since the maximum pairwise error probability differs little from other pairwise error probabilties, proper design techniques have to con...

We present a TCP flow level performance evaluation on error rate aware scheduling algorithms in Evolved UTRA and UTRAN networks. With the introduction of the error rate, which is the probability of transmission failure under a given wireless condition and the instantaneous transmission rate, the transmission efficiency can be improved without sacrificing the balance between system performance a...

TCP protocol is widely used in terrestrial Internet, but the terrestrial TCP protocol satellite cannot be directly applied to satellite network with high-transmission delay and high bit error rate. The congestion control is the most core mechanism of TCP protocol, and has direct impact on the overall performance of transmission. The improved scheme of existing TCP control mechanisms such as TCP...

Bluetooth is an open specification for a technology to enable short-range wireless communications that operate in an ad hoc fashion. Bluetooth uses frequency hopping with a slot length of 625 ms. Each slot corresponds to a packet and multi-slot packets of three or five slots can be transmitted to enhance the transmission efficiency. However, the use of multi-slot packet may degrade the transmis...