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RF Transceiver of WiMAX Base Station for 802.16d
White Papers The design of a RF transceiver for WiMAX base station based on IEEE 802.16d standard using OFDM technology is presented in this paper. The RF transceiver operates in 700MHz frequency band, and employs dual-conversion configuration and FDD mode.
[April 22, 2009, 1:24]
Strategies for Fast Scanning and Handovers in WiMax/802.16
White Papers In WiMax/IEEE 802.16 with mobility support, scanning for an available channel by a mobile station, at start up or when about to perform a handover must be done promptly. The paper propose strategies that a mobile station can use to reduce the time...
[April 22, 2009, 1:24]
Queue Management Strategies to Improve TCP Fairness in IEEE 802.11 Wireless LANs
White Papers Wireless Local Area Networks (WLANs) based on the IEEE 802.11 technology have become increasingly popular and ubiquitous. The 802.11 standard allows each station in a WLAN equal opportunity to access the wireless channel, which can result in unfair...
[December 27, 2007, 0:01]
WiMAX Relay Networks: Opportunistic Scheduling to Exploit Multiuser Diversity and Frequency Selectivity
White Papers The paper studies the problem of scheduling in OFDMA-based relay networks with emphasis on IEEE 802.16j based WiMAX relay networks. In such networks, in addition to a base station, multiple relay stations are used for enhancing the throughput, and...
[April 15, 2009, 1:22]
Performance Analysis of IEEE 802.11 MAC Protocols in Wireless LANs
White Papers Tt is well known that, as the number of active stations increases, the performance of IEEE 802.11 MAC protocol in terms of delay and throughput degrades dramatically, especially when each station's load approaches its saturation state.
[January 18, 2006, 0:01]
Macsense WUA-400/700 AeroPad
Downloads As a powerful device, the AeroPad can send and receive data up to speeds of 11Mbps and being fully interoperable with Apple AirPort Base Station and other IEEE 802.11b 2.4GHz compliant equipment. AeroPad is a plug and play 11Mbps USB network...
[June 4, 2003, 8:00]
Macsense WUA-400/700 AeroPad
Downloads As a powerful device, the AeroPad can send and receive data up to speeds of 11Mbps and being fully interoperable with Apple AirPort Base Station and other IEEE 802.11b 2.4GHz compliant equipment. AeroPad is a plug and play 11Mbps USB network...
[November 2, 2003, 6:00]
Performance of Wireless LANs Based on IEEE 802.11 MAC Protocols
White Papers However, it is well known that, as the traffic goes up, the performance of IEEE 802.11 MAC drops dramatically in terms of delay and throughput, especially when the station approaches its saturation state.
[January 18, 2006, 0:01]
Switching Cost Minimization in the IEEE 802.16e Mobile WiMAX Sleep Mode Operation
White Papers Most of the existing works on the IEEE 802.16e sleep mode operation focus on the decision making before a mobile station switching to sleep mode state. After the mobile station is switched to sleep mode, the deactivation of it mainly depends on new...
[April 23, 2009, 1:24]
Smart Power-Saving Mode for IEEE 802.11 Wireless LANs
White Papers Static PSM (Power-Saving Mode) schemes employed in the current IEEE 802.11 implementations could not provide any delay-performance guarantee because of their fixed wakeup intervals. This paper proposes a Smart PSM (SPSM) scheme, which directs a...
[January 20, 2006, 0:01]
Routing in 802.16 Mesh Networks: A Survey Paper
White Papers The IEEE 802.16 WiMax standard provides a mechanism for creating multi-hop mesh network, which can be deployed as a high speed wide area wireless network. The goal of this paper is to present some routing algorithms proposed by various authors for...
[April 22, 2009, 1:24]
Performance Issues With IEEE 802.11 in Ad Hoc Networking
White Papers Thus, studies in wireless multi-hop networks, also called ad hoc networks often rely on the use of the IEEE 802.11 standard for the physical and MAC layers. Although 802.11 was initially designed for infrastructure-based networks, the Distributed...
[July 20, 2007, 6:07]
WiMAX/802.16 Security in Mesh Mode
White Papers Even though IEEE 802.16 defines a security sub layer to provide privacy by encrypting connections between Base Station (BS) and Subscriber Station (SS), there are still several security problems to be settled.
[April 22, 2009, 1:24]
Performance Analysis of Multiantenna WiMAX Systems Over Frequency-Selective Fading Channels
White Papers A multicell WiMax system which supports Orthogonal Frequency Division Multiplexing (OFDM) and antenna arrays at the base stations is considered in this paper as conforming to the IEEE 802.16-2004 standard.
[April 22, 2009, 1:24]
Security in Link Layer of WiMAX Networks
White Papers The IEEE 802.16e standard added the use of AES to the link layer to provide stronger encryption of data. Privacy is accomplished by encrypting connections between the subscriber station and the base station.
[April 22, 2009, 1:24]
Bandwidth Allocation With Half-Duplex Stations in IEEE 802.16 Wireless Networks
White Papers IEEE 802.16 is a recent IEEE standard for broadband wireless access networks. In IEEE 802.16 networks, the Medium Access Control (MAC) protocol is centralized and explicitly supports Quality of Service (QoS).
[April 23, 2009, 1:24]
Accelerating WiMAX System Design With FPGAs
White Papers WiMAX, or the IEEE 802.16 standard for broadband wireless access, is increasingly gaining in popularity as a technology with significant market potential. The PHY and MAC layers of a typical WiMAX base station are then described.
[November 19, 2004, 2:00]
ICAM: Integrated Cellular and Ad-Hoc Multicast
White Papers The proxy then forwards the packets to the receivers through an IEEE 802.11-based ad-hoc network. In third Generation (3G) wireless data networks, multicast throughput decreases with the increase in multicast group size, since a conservative...
[December 13, 2006, 0:00]
An Adaptive Bandwidth Request Mechanism for QoS Enhancement in WiMax Real Time Communication
White Papers The IEEE 802.16 standard for broadband wireless metropolitan area network supports real time and non-real time services. Till now published literature on WiMax states that, a Service Station (SS) requests for bandwidth to a Base Station (BS) for...
[July 11, 2008, 1:02]
End-to-end Fairness for TCP Traffic in 802.11e Wireless Mesh Networks Without Coordination
White Papers First it shows that TCP ACK packets have to be prioritised using IEEE 802.11e since otherwise congestion losses of ACK packets cause unpredictable performance. Then it proves that prioritising ACK packets alone and ignoring TCP data packets results...
[December 20, 2007, 0:01]
