Classification of access network types: Ethernet, wireless LAN, ADSL, cable modem or dialup?

2008 ◽  
Vol 52 (17) ◽  
pp. 3205-3217 ◽  
Author(s):  
Wei Wei ◽  
Bing Wang ◽  
Chun Zhang ◽  
Jim Kurose ◽  
Don Towsley
2020 ◽  
Vol 9 (2) ◽  
pp. 51-60
Author(s):  
Pritee Parwekar ◽  
Adilya Bakambekova ◽  
Talgat Bizhigit ◽  
Yeldar Toleubay

Different access network types are characterized by a variety of attributes which include link bandwidths, physical media, capacity, and reliability. Therefore, the question of accurately identifying whether the sender uses a wired ethernet connection or a wireless LAN connection comes into place. This article aims to analyse, simulate, validate, and improve the existing classification scheme which is based on measuring entropy of packet pair inter-arrival times and median. A riverbed modeller (former OPNET) is used for simulating the different scenarios. Small-scale experiment conducted on campus at the Nazarbayev University (NU) validates the insignificance of the packet probe size chosen for the classification.


2001 ◽  
Vol 39 (11) ◽  
pp. 82-89 ◽  
Author(s):  
J. Ala-Laurila ◽  
J. Mikkonen ◽  
J. Rinnemaa

Author(s):  
Mateen Yaqoob ◽  
Mustafa Shakir

With the advances in wireless technology during the past years, continued and reliable connectivity has been also ensured through broadband access network. A present day wireless network which provides affordable speed to end user requirements is wireless LAN (IEEE 802.11 standard), which is commercially known as wireless fidelity (Wi-Fi). One of its shortcomings is limited coverage area and thus, there is a need for wireless networks which can provide high speed with maximum coverage. WiMAX overcomes this need for broadband access with a high coverage area. But the installation cost of WiMAX is considerably high as compared to WLAN. So, the interworking of these two networks will ensure high speed broadband access at all times, a considerable coverage area, and reduced cost. However, interworking of these two networks allows the accommodation of the maximum number of subscribers. Bandwidth efficiency provides insight information of how the frequency spectrum is effectively utilized.


1966 ◽  
Vol 24 ◽  
pp. 21-23
Author(s):  
Y. Fujita

We have investigated the spectrograms (dispersion: 8Å/mm) in the photographic infrared region fromλ7500 toλ9000 of some carbon stars obtained by the coudé spectrograph of the 74-inch reflector attached to the Okayama Astrophysical Observatory. The names of the stars investigated are listed in Table 1.


Author(s):  
Gerald Fine ◽  
Azorides R. Morales

For years the separation of carcinoma and sarcoma and the subclassification of sarcomas has been based on the appearance of the tumor cells and their microscopic growth pattern and information derived from certain histochemical and special stains. Although this method of study has produced good agreement among pathologists in the separation of carcinoma from sarcoma, it has given less uniform results in the subclassification of sarcomas. There remain examples of neoplasms of different histogenesis, the classification of which is questionable because of similar cytologic and growth patterns at the light microscopic level; i.e. amelanotic melanoma versus carcinoma and occasionally sarcoma, sarcomas with an epithelial pattern of growth simulating carcinoma, histologically similar mesenchymal tumors of different histogenesis (histiocytoma versus rhabdomyosarcoma, lytic osteogenic sarcoma versus rhabdomyosarcoma), and myxomatous mesenchymal tumors of diverse histogenesis (myxoid rhabdo and liposarcomas, cardiac myxoma, myxoid neurofibroma, etc.)


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