throughput Resources

ZDNet Dictionary Definition

Throughput: The speed with which a computer processes data. It is a combination of internal processing speed, peripheral speeds (I/O) and the efficiency of the operating system and other system...; Full Throughput Definition >>

ZDNet Resources

The Hidden Cost of Overhead in MIMO Wireless LANs: Multiple Input Multiple Output MIMO communication, enabled by the presence of multiple transmit and receive antennas in the communication link, is a physical layer technology that can improve throughput in WLANs. The cost of MIMO in terms of additional overhead, unfortunately, is often overlooked. Using representative physical and MAC models,...; Tags: Throughput, Overhead, MAC, MIMO, Workforce Management, Human Resources; White papers 2007-05-07
CDMA Channel Parameters Maximizing TCP Throughput: A single TCP session traversing a wireless channel is considered in this paper, with a constant SIgnal to Noise Ratio SINR at the receiver. The problem of determining the optimal transmission energy per bit is considered, to maximize TCP throughput. Specifically, in the case where direct sequence spread spectrum modulation...; Tags: Throughput, CDMA, TCP, Tcp/Ip, Networking; White papers 2007-01-01
Optimum Number of RLC Retransmissions for Best TCP Performance in UTRAN: As far as transfer reliability is concerned, the wireless segment of UTRAN is the weakest part of an Internet session. To overcome this imperfection, the RLC protocol features a link-level retransmission mechanism. This paper shows by analytical means and computer simulations that for a given Block Error Rate BLER, the...; Tags: Throughput, TCP, Tcp/Ip, Networking; White papers 2007-01-01
Is Tampered-TCP Really Effective for Getting Higher Throughput in the Internet?: This paper examines the effectiveness of tampered-TCP whose congestion control mechanism has been modified by malicious users for higher than the normal TCP throughput. This paper focuses on a tampered-TCP in which the increase and decrease ratio of the congestion window size were changed during the congestion avoidance phase. The...; Tags: Throughput, Internet, Congestion, TCP, Tcp/Ip, Networking; White papers 2006-10-19
Congestion Control Mechanism of TCP for Achieving Predictable Throughput: The demand of Internet users for diversified services has increased due to the rapid development of the Internet, and applications requiring QoS guarantee, such as real-time media delivery services, have become popular. The research group has proposed transport-layer approaches to provide such high-level quality of network services. This paper proposes...; Tags: Throughput, Congestion, TCP, Tcp/Ip, Internet, Networking; White papers 2006-10-12

Throughput and Transmission Capacity of Ad Hoc Networks With Channel State Information: This paper develops a general framework for deriving the spatial throughput and transmission capacity of spatially Poisson distributed ad hoc networks for random (e.g., fading) channels, and random transmission distances. In both of these scenarios the randomness of the channels and ranges invariably lowers both throughput and transmission capacity assuming...; Tags: Channel, Advertisement, Throughput, Transmission Capacity, Networking; White papers 2006-07-05
On Improving the Throughput of Media Delivery Applications in Heterogeneous Overlay Network: Overlay multicast is becoming increasingly popular for multimedia delivery over Internet. The available bandwidths between sender and different receivers are generally heterogeneous. This paper proposes a scheme to improve the throughput of a media delivery session with heterogeneous receivers by organizing the receivers into layered data distribution meshes and sending...; Tags: Bandwidth, Solution, Throughput, Network, Mesh; White papers 2006-03-16
TCP NewReno: Slow-But-Steady or Impatient?: This paper compares the throughputs of two different TCP NewReno variants, namely Slow-but-Steady and Impatient. The paper develops analytic throughput models of these variants as a function of round-trip time, loss event rate, and the burstiness of packet drops within a loss event. The models build upon prior work on...; Tags: Throughput, University Of Calgary, TCP, Tcp/Ip, Networking; White papers 2006-02-21
Joint PHY/MAC Based Link Adaptation for Wireless LANs With Multipath Fading: Wireless local area networks offer a range of transmitted data rates that are to be selected according to estimated channel conditions. However, due to packet overheads and contention times introduced by the CSMA/CA multiple access protocol, effective throughput is much less than the nominal data rates. Most multimedia applications use...; Tags: Throughput, Network, WLAN, Adaptation, Payload, Multipath, University Of California, LANs, Wireless LANs, Wi-Fi, Networking, Wireless; White papers 2006-01-18
Root Cause Analysis for Long-Lived TCP Connections: While the applications using the Internet have changed over time, TCP is still the dominating transport protocol that carries over 90% of the total traffic. Throughput is the key performance metric for long TCP connections. The achieved throughput results from the aggregate effects of the network path, the parameters of...; Tags: Throughput, TCP, Analysis, Tcp/Ip, Networking; White papers 2005-10-27
Intel and S3 Accelerate Delivery of IP DSLAMs Needed for Triple Play: Telecom providers and IP DSLAM developers face the same issues. Flexibility is needed to allow for continuous introduction of features through software. High throughput is necessary to enable QoS in video services. Low cost is vital to ensure that triple play services can be delivered at a reasonable price point....; Tags: S3 Inc., Throughput, IP, Flexibility, Intel Corp., Telecom & Utilities, Telephony, Network Technology, Tools & Techniques, Telecommunications, Networking, Management; Case studies 2005-09-01
Throughput Analysis and Admission Control for IEEE 802.11a: This paper proposes a new Markov model for the Distributed Coordination Function DCF of IEEE 802.11. The model incorporates carrier sense, non-saturated traffic and SNR, for both basic and RTS/CTS access mechanisms. Analysis of the model shows that the throughput first increases, and then decreases with the number of active...; Tags: IEEE 802.11, Throughput, Admission, Springer Science+Business Media, Analysis, Wireless LANs, Wi-Fi, Wireless; White papers 2005-07-16
Performance Evaluation of TCP in an Integrated WPAN and WLAN Environment: Short-range low power radio frequency systems such as Bluetooth and UWB enable the deployment of Wireless Personal Area Networks WPAN. A WPAN can interface to larger networks to provide broader network access and Internet connectivity. This paper evaluates the performance of TCP over an integrated WLAN and WPAN system using...; Tags: Throughput, Performance, Network, Radio Frequency, Window, WLAN, Performance Evaluation, TCP, Tcp/Ip, Construction, Wireless LANs, Wi-Fi, Bluetooth, LANs, Ultrawideband (UWB), Performance Management, Wireless, Networking, Human Resources, Workforce Management; White papers 2005-05-03
802.11 Wireless Networks - A Peek Ahead at 802.11n: MIMO OFDM: 802.11 Task Group N TGn has an interesting goal. Most IEEE task groups focus on increasing the peak throughput, making data fly as fast as possible during the time it is being transmitted. TGn's goal is to achieve 100 Mbps net throughput, after subtracting all the overhead for protocol management...; Tags: IEEE 802.11, Throughput, Network, IEEE 802.11n, MIMO-OFDM, Mbps, Wireless Network, Task Group N, Wireless LANs, Wi-Fi, Wireless; Book chapters 2005-04-14
Maximum Throughput Scheduling in Time-Varying-Topology Wireless Ad-Hoc Networks: In wireless ad-hoc networks, signal interference and collisions from simultaneous transmissions by neighboring nodes significantly degrade throughput. Hence, when throughput is of the essence, it is necessary to devise scheduling policies for coordinating the wireless transmissions. This paper focuses on the problem of scheduling the transmissions of a finite number...; Tags: University Of Maryland, Throughput, Network, Wi-Fi, Wireless; White papers 2005-03-18
Queuing Delay and Achievable Throughput in Random Access Wireless Ad Hoc Networks: This paper focuses on characterizing the average end-to-end delay and maximum achievable per-node throughput in random access multihop wireless ad hoc networks with stationary nodes. The paper presents an analytical model that takes into account the number of nodes, the random packet arrival process, the extent of locality of traffic,...; Tags: Throughput, Microsoft Access, Network, Rensselaer Polytechnic Institute, Node, Networking, Wi-Fi, Wireless; White papers

Additional Resources

VMware and common performance myths: Rich McDougall and Scott Drummand, performance gurus over at VMware, presented a fantastic review of some of the performance testing VMware has been doing at the VMware analyst day. I posted something about the findings of that research in the post, Is VMware busting the virtualization tax myth. I've just...; Tags: Virtualization, Performance, VMware Inc., Performance Management, Human Resources, Workforce Management, Dan Kusnetzky; Blog posts 2008-07-22
D-Link Xtreme N Duo Media Router DIR-855 - wireless router: We pitted the D-Link Xtreme N Duo Media Router DIR-855 against the only other true dual-band router we've reviewed, the Linksys WRT610N. The DIR-855 beat the WRT610N in overall throughput performance, but its design and desktop setup application couldn't compete. Both routers offer about the same range; the WRT610N provides...; Tags: Home networking, Routers & switches, Network technology, NETWORKING, WCN, wireless, wireless router, D-Link DIR-855, D-Link Systems, router, Linksys WRT610N; Product reviews 2008-07-18
Linksys WRT610N Simultaneous Dual-N Band Wireless Router: Editor's note: Although our First Look video states that the WRT610N costs only $149, the street price may prove higher.The Linksys WRT610N Simultaneous Dual-N Band Wireless Router is the first true dual-band wireless router we've reviewed, and one of only a few on the market. In our tests, it easily...; Tags: Home networking, Routers & switches, Network technology, Network-attached storage (NAS), NETWORKING, wireless router, Storage Link, WRT610N, Linksys Inc., router, Linksys WRT310N, storage; Product reviews 2008-07-17
Vox BlackBox (1TB): The Vox BlackBox offers 1TB of storage and can be found online from roughly $310 to $340. Aside from its low cost per gigabyte, there's unfortunately little to recommend about this dual-drive Network Attached Storage NAS device. From the desktop application to the Web-based interface, the device is consistently confusing....; Tags: Network-attached storage (NAS), Storage, NETWORKING, BlackBox, VoX; Product reviews 2008-07-11