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IEEE 802.16 (71 results)
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- A Cooperative MAC for Distributed Space-Time Coding in an IEEE 802.16 Network
- In the next-generation WiMAX system, cooperative communication is being considered as an advanced technique to increase the throughput and improve the signal quality. In a cooperative scenario, multiple stations can jointly emulate the antenna elements of a multi-input multi-output MIMO system in a distributed fashion. Unlike conventional space-time coding STC...
- White papers 2009-10-07
- Maximizing Unavailability Interval for Energy Saving in IEEE 802.16e Wireless MANs
- This paper presents an energy conservation scheme, Maximum Unavailability Interval MUI, to improve the energy efficiency for the Power Saving Class of Type II in IEEE 802.16e. By applying the Chinese Remainder Theorem, the proposed MUI is guaranteed to find the maximum Unavailability Interval, during which the transceiver can be...
- White papers 2009-04-01
- Security Issues of PHY & MAC Layers in IEEE 802.16
- Different types of threats and vulnerabilities associated with the security of the WiMax/802.16 Broadband Wireless Access BWA technology are discussed in this paper. The complementary phases of all the related liabilities to the Medium Access Control MAC and the Physical PHY layers are reviewed also. The concerned threats and impacts...
- White papers 2009-03-01
- Evaluation of Adaptive Radio Techniques for the Under-11GHz Broadband Wireless Access
- The evaluation is performed in the attempt to improve link availability and transmission quality of BWA Broadband Wireless Access systems, and to achieve an efficient use of radio resources. The paper has analysed and compared the physical and link layer performance for two common standards: the IEEE 802.16 WMAN-SC and...
- White papers 2008-11-29
- IEEE 802.16 Security Issues: A Survey
- This paper reviews the fundamentals and security issues of WiMAX networks addressed in relevant standards and several papers. At first a global overview of the WiMAX technology is provided followed by a security concerns and problems associated to the WiMAX/IEEE 802.16 broadband wireless technology. Then an explanation of security vulnerabilities...
- White papers 2008-11-27
- An IEEE 802.16 WiMAX Module for the NS-3 Simulator
- ns-3 is a recently released next generation simulator intended as a replacement of the popular ns-2. It enables a highly rich set of features and is expected to become the first choice of the scientific community soon. ns-3 is in its evolution phase and work at different fronts is still...
- White papers 2008-11-05
- Interference Tolerant Power Control Algorithm of Ranging Process in IEEE 802.16 Relay System
- This paper considers the ranging process of IEEE 802.16 system in relay system. An interference problem between MS-BS ranging (i.e. ranging between mobile station and base station) and MS-RS ranging (i.e. ranging between mobile station and relay station), which is caused by the introduction of relay systems, is addressed. A...
- White papers 2008-10-17
- How Many Traffic Classes Do We Need in WiMAX?
- This paper addresses the issue of multiservice support in IEEE 802.16 or WiMAX networks. The capacity for supporting multiple service classes is indeed important for any access technology where bandwidth is limited, which is the case for IEEE 802.16. The standard currently proposes four traffic classes, and specifies that for...
- White papers 2008-10-07
- Routing & Scheduling Algorithm of IEEE 802.16 Mesh Backhaul Network for Radio Recourse Management (RRM)
- The paper investigates the resource management issues in IEEE 802.16 mesh backhaul network. The aim is to exploit the multipath routing for efficient utilization of wireless radio resources, and thus provides spectral efficiency. The silent feature of scheduling algorithm is to allow dispatching data blocks dynamically, based on current buffer...
- White papers 2008-10-04
- How to Improve the Efficiency of IPv6 Handovers in IEEE 802.16 Networks
- The first generation of fully conformant IEEE 802.16-based networks is being deployed throughout the world. Most of these networks do not support full mobility, due to radio access layer limitations. Newer solutions, based on IEEE 802.16-2005 standard, offer mobility support for subscriber stations. Unfortunately, after quickly changing the point of...
- White papers 2008-09-28
- Path Selection for Mobile Stations in IEEE 802.16 Multihop Relay Networks
- Multimedia applications over wireless mobile networks become more popular with the increasing deployment of wireless infrastructures. IEEE 802.16 standard has become an emerging technology to support broadband access and Quality of Service QoS for real-time multimedia applications over wireless networks. This paper discusses the path selection problem in IEEE 802.16...
- White papers 2008-08-06
- Performance Evaluation of Wireless Systems Implementing IEEE 802.16 Standard
- IEEE 802.11 Wireless LANs WLAN has been widely deployed to provide point-to-multipoint wireless broadband access in local areas such as offices, malls, and small companies. Most of the WLANs are connected to the backbone via a wired distribution system in a point-to-point connection. In this case, IEEE 802.11 wireless distribution...
- White papers 2008-07-17
- IPv6 Over IEEE 802.16 (WiMAX) Networks: Facts and Challenges
- Deploying the new generation "Internet Protocol" (IPv6) over 802.16-based wireless networks is facing an important challenge as the IEEE 802.16 standard is failing to support IPv6 functionalities. In fact, unlike the other 802 standards, the IEEE 802.16 is based on a Point-to-MultiPoint PMP communication model, where no direct connection (at...
- White papers 2008-07-01
- The Cost of Using IEEE 802.16d Dynamic Channel Configuration
- Ubiquitous broadband Internet access is an important requirement to satisfy user demands and support a new set of real time services and applications. IEEE 802.16, as a Broadband Wireless Access technology, can significantly contribute in this area. It is able to provide high throughput over large distances, with intrinsic QoS...
- White papers 2008-02-28
- Secure Multicast in WiMAX
- Multicast enables efficient large-scale content distribution and has become more and more popular in network service. Security is a critical issue for multicast because many applications require access control and privacy. This issue is more sensitive to wireless network, which is lack of physical boundaries. IEEE 802.16 is the standard...
- White papers 2008-02-01
- Bandwidth Allocation With Half-Duplex Stations in IEEE 802.16 Wireless Networks
- 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. That is to say, access to the medium by a number of Subscriber Stations SSs is centrally controlled by...
- White papers 2007-12-01
- On TCP-Aware Uplink Scheduling in IEEE 802.16 Networks
- This paper propose two polling based scheduling schemes for applications based on TCP in a multipoint-to-point IEEE 802.16 network. The first scheme uses TCP congestion window cwnd size, whereas the second one uses cwnd size and TCP timeouts to allocate time slots among the contending TCP flows. The authors ensure...
- White papers 2007-11-24
- Mobility Improvement in IEEE 802.16
- WiMAX, IEEE standard 802.16 has attracted attention of users and industry, for its promise of delivering broadband wireless connection. WiMAX was initially developed as a fixed wireless broadband solution, to be used as a last mile connection, substituting the need for laying DSL or Ethernet cables as they become difficult...
- White papers 2007-11-22
- Coverage Extension of WiMax Using Multihop in a Low User Density Environment
- The usage of multihop transmission enables a cost efficient extension of the coverage of a base station BS especially in low user density environment. In this paper, a network consisting of BSs and fixed Subscriber Stations SSs is considered in which the SSs are capable to act as Relay Stations...
- White papers 2007-11-10
- Classification of the Uplink Scheduling Algorithms in IEEE 802.16
- The demand for high speed broadband wireless systems is increasing rapidly. In this context, the IEEE 802.16 standard defines the wireless broadband access technology called WiMAX, which introduces several interesting advantages including variable and high data rate, last mile wireless access, point to multipoint communication, large frequency range and QoS...
- White papers 2007-10-16
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