Results 151 to 160 of about 10,965 (186)

Cell Capacity for IEEE 802.16 Coverage Extension

2008 5th IEEE Consumer Communications and Networking Conference, 2008
This paper analyzes a two-hop extension to the coverage of an IEEE 802.16 cell. There is natural degradation in cell capacity due to multihop communications which can be mitigated by spatial reuse, adaptive modulation and coding. We estimate the available capacity by analyzing the random geometry related to the locations of the base station, the ...
Mannersalo, Petteri, Bohnert, Thomas, Paschos, Georgios   +3 more
openaire   +2 more sources

Multicast qos support in ieee 802.16

Proceedings of the 3rd ACM workshop on QoS and security for wireless and mobile networks, 2007
Multicast is a very popular bandwidth-conserving technology exploited in many multimedia applications. However, the existing IEEE 802.16 spec. provides no error recovery mechanism (ARQ) for multicast traffic. ARQ absence in wireless networks unreliable by their nature leads to frequent packet losses, which is inappropriate for most of multimedia ...
Andrey Lyakhov, Vladimir Vishnevsky, Mikhail Yakimov   +2 more
openaire   +1 more source

Spatio-ternporal schedulers in IEEE 802.16

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
With the growing interest in broadband wireless access (BWA) and demand for mobile high-speed connection, there is a need to extend wireless connectivity to passengers travelling in highspeed vehicles. In this paper, we use the IEEE 802.16 standard as a backhaul communication technology for broadband wireless access to railway systems.
S. Motahari, E. Haghani, S. Valaee
openaire   +1 more source

Bandwidth Recycling in IEEE 802.16 Networks

IEEE Transactions on Mobile Computing, 2010
IEEE 802.16 standard was designed to support the bandwidth demanding applications with quality of service (QoS). Bandwidth is reserved for each application to ensure the QoS. For variable bit rate (VBR) applications, however, it is difficult for the subscriber stations (SSs) to predict the amount of incoming data. To ensure the QoS guaranteed services,
David Chuck, J. Morris Chang
openaire   +1 more source

Cellular WiMAX/IEEE 802.16 capacity estimation

2009 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, 2009
WiMAX has been an appealing technology due to its provision of high data rate applications to users. In this paper, we have estimated and analyzed the capacity of IEEE 802.16/WiMAX network, taking into consideration as a cellular mobile technology. Capacity here is in terms of number of users in a cellular environment of definite size.
Sadia Murawwat, Kazi Ahmed
openaire   +1 more source

Efficient Two-dimensional Data Allocation in IEEE 802.16 OFDMA

2010 Proceedings IEEE INFOCOM, 2010
In IEEE 802.16, the wireless resources are logically partitioned into 5-ms frames, which extend in two dimensions: time and frequency. To break down the complexity of resource allocation at the base station, a split approach has been proposed in the literature, where the tasks of scheduling packets and allocating them into frames are solved in separate
Claudio Cicconetti, Luciano Lenzini, LODI, ANDREA, MARTELLO, SILVANO, Enzo Mingozzi, MONACI, MICHELE   +5 more
openaire   +1 more source

TCP-Aware Uplink Scheduling for IEEE 802.16

IEEE Communications Letters, 2007
In IEEE 802.16 networks, a bandwidth request-grant mechanism is used to accommodate various QoS requirements of heterogeneous traffic. However, it may not be effective for TCP flows since (a) there is no strict QoS requirement in TCP traffic; and (b) it is difficult to estimate the amount of required bandwidth due to dynamic changes of the sending rate.
Kim S., Yeom I. Yeom, Ikjun
openaire   +2 more sources

Coexistence and Interworking of IEEE 802.16 and IEEE 802.11(e)

2006 IEEE 63rd Vehicular Technology Conference, 2006
The coexistence and interworking of IEEE 802.16 and IEEE 802.11 is an acute problem. The frame-based medium access of 802.16 requires rigorous protection against interference from wireless local area networks in order to operate properly. The 802.11e enhancements of the medium access control of 802.11 introduce the capability to support QoS.
L. Berlemann, C. Hoymann, G.R. Hiertz, S. Mangold   +3 more
openaire   +1 more source

Avoiding congestion in IEEE 802.16 and IEEE 802.11b using Qualnet

2013 Fifth International Conference on Advanced Computing (ICoAC), 2013
Wimax is an broadband wireless technology based on IEEE 802.16. It is very helpful and cheaper than other possible solutions. It is purely based on the 4G technology for the upcoming generation. In wireless technology the major problem is speed, Quality of Service, data rates in order to overcome that they going for some valuable technology.
M. Suresh, C. Kamalanathan, S. Valarmathy   +2 more
openaire   +1 more source

A link adaptation algorithm for IEEE 802.16

IEEE Wireless Communications and Networking Conference, 2005, 2005
Broadband wireless access (BWA) is a promising emerging technology. The IEEE 802.16 task group recently standardized the physical (PHY) and medium access control (MAC) layers for BWA systems. To operate in a wide range of physical channel conditions, the standard defines a robust and flexible PHY.
S. Ramachandran, C.W. Bostian, S.F. Midkiff   +2 more
openaire   +1 more source