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WSN had drawn a great attention. In malicious environments for a functional WSN, security mechanisms
are essential. Malicious or internal attacker has gained attention as the most challenging attacks to
WSNs. Many works have been done to secure WSN from internal attacks but most of them relay on either
training data set or predefined thresholds. It is a great challenge to find or gain knowledge about the
Malicious. In this paper, we develop the algorithm in two stages. Initially, Abnormal Behaviour
Identification Mechanism (ABIM) which uses cosine similarity. Finally, Dempster-Shafer theory (DST)is
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method we do not need any predefined threshold or tanning data set of the nodes.
This paper provides a high-level comparison
between LTE and WiMAX. The focus is on two primary areas: System Architecture and Physical Layer. The System Architecture describes the different functional elements in LTE and WiMAX and attempts to map similar functionality (such as mobility, security, access-gateway). We also compare and contrast the various aspects (such as transmission modes, duplexing types) of the physical layer.
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Wireless sensor networks (WSNs) consists of small nodes with constrain capabilities. It enables numerous
applications with distributed network infrastructure. With its nature and application scenario, security of
WSN had drawn a great attention. In malicious environments for a functional WSN, security mechanisms
are essential. Malicious or internal attacker has gained attention as the most challenging attacks to
WSNs. Many works have been done to secure WSN from internal attacks but most of them relay on either
training data set or predefined thresholds. It is a great challenge to find or gain knowledge about the
Malicious. In this paper, we develop the algorithm in two stages. Initially, Abnormal Behaviour
Identification Mechanism (ABIM) which uses cosine similarity. Finally, Dempster-Shafer theory (DST)is
used. Which combine multiple evidences to identify the malicious or internal attacks in a WSN. In this
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A complete description of long term evolution including lte advanced. Study includes technical, services and strategic marketing information and gives a thorough overall picture of the technology and business.
Performance Evaluation of Interactive Video Streaming over WiMAX Network IJECEIAES
Nowadays, the desire of internet access and the need of digital encodings have influenced quite a large number of users to access high quality video application. Offering multimedia services not only to the wired but to wireless mobile client is becoming more viable. In wireless medium, videostreaming still has high resource requirements, for example, bandwidth, traffic priority, smooth play-backs. Therefore, bandwidth demands of these applications are far exceeding the capacity of 3G and Wireless Local Area Networks (LANs). The current research demonstrates the introductory understanding of the Worldwide Interoperability for Microwave Access (WiMax) network, applications, the mechanisms, its potential features, and techniques used to provide QoS in WiMAX, and lastly the network is simulated to report the diverse requirements of streamed video conferencing traffic and its specifications. For this purpose two input parameters of video traffic are selected, i.e, refresh rate, which is monitored in terms of frames per second and pixel resolutions which basically counts the number of pixels in digital imaging. The network model is developed in OPNET. Different outcomes from simulation based models are analyzed and appropriate reasons are also discussed. Apart from this, the second aim of the current research is to address whether WiMAX access technology for streaming video applications could provide comparable network performance to Asymmetric Digital Subscriber Line (ADSL). For this purpose network metrices such as End to End delay and throughput is taken into consideration for optimization.
Network economics of optical transport networks with sd fec technologyAnuj Malik
IEEE ANTS 2013 Presentation
This presentation evaluates the impact of SD-FEC technology upon network design and economics in a long haul optical transport network. The network study shows that the SD-FEC technology not only reduces the TCO (total cost of ownership) but also simplifies the network design. A real world network model is utilized to quantify and compare results.
Comparison Static ICIC and Adaptive ICIC on TD-LTERay KHASTUR
The subscriber on the cell edge will have bad experience due to impact of this co-channel interference. There is function of SFR (Soft Frequency Reuse) in LTE-TDD that is manipulated BW into several cell edge style. On Genex U-Net we can use this feature to minimize of inter cell interference, we can chose static ICIC or adaptive ICIC based on field condition.
The important goal of this thesis is represented as demonstrating a self-organising based process for current versions of heterogeneous LTE-Advanced networks to simultaneously improve both quality of service and ability. The main index terms of this research could be exhibited as: SON; LTE-A, HetNets; Femtocell; Interference, Multi-Layer; Handover, Access Control; Power Control, eICIC. The self-organizing method of this research is described as the primary goal, to be got through the following targets: ThesisScientist.com
A complete description of long term evolution including lte advanced. Study includes technical, services and strategic marketing information and gives a thorough overall picture of the technology and business.
Performance Evaluation of Interactive Video Streaming over WiMAX Network IJECEIAES
Nowadays, the desire of internet access and the need of digital encodings have influenced quite a large number of users to access high quality video application. Offering multimedia services not only to the wired but to wireless mobile client is becoming more viable. In wireless medium, videostreaming still has high resource requirements, for example, bandwidth, traffic priority, smooth play-backs. Therefore, bandwidth demands of these applications are far exceeding the capacity of 3G and Wireless Local Area Networks (LANs). The current research demonstrates the introductory understanding of the Worldwide Interoperability for Microwave Access (WiMax) network, applications, the mechanisms, its potential features, and techniques used to provide QoS in WiMAX, and lastly the network is simulated to report the diverse requirements of streamed video conferencing traffic and its specifications. For this purpose two input parameters of video traffic are selected, i.e, refresh rate, which is monitored in terms of frames per second and pixel resolutions which basically counts the number of pixels in digital imaging. The network model is developed in OPNET. Different outcomes from simulation based models are analyzed and appropriate reasons are also discussed. Apart from this, the second aim of the current research is to address whether WiMAX access technology for streaming video applications could provide comparable network performance to Asymmetric Digital Subscriber Line (ADSL). For this purpose network metrices such as End to End delay and throughput is taken into consideration for optimization.
end to end delay performance analysis of video conferencing over lteINFOGAIN PUBLICATION
Mental development to use the data, such as multimedia, video and online games led to the development of a technique called LTE long term evolution. The goal of this paper is to analyze the quality of service (QoS) performance and its effects when video is streamed over LTE .Using OPNET (Optimized Network Engineering Tool). the performance can be simulated having Different scenarios for video conferencing . in addition to we also measured the performance of packet End-to-End delay .
Wimax Emulator to Enhance Media and Video Qualityijceronline
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
The paper discussed the implementation of the use of
Voice over Internet Protocol services, which is resulting in the
enormous growth of broadband network. The main objective
of this paper is to evaluate the QoS of VOIP for different
broad band networks. Wired, Wireless Local Area Network
(WLAN), Worldwide Interoperability for Microwave Access
(WiMAX) and Universal Mobile Telecommunication System
(UMTS) networks were implemented in OPNET Modeler The
quality is compared using different QoS parameters such as
end-to-end delay, Mean Opion Score (MOS), throughput and
jitter. The VoIP codes used in the measurements of QoS is
G.729A with sampling rate of 8 kbps .The results analyzed and
the performance evaluated will give network operators an
opportunity to select the codec for better services of VoIP for
customer satisfaction.
Analysis of VoIP Traffic in WiMAX EnvironmentEditor IJMTER
Worldwide Interoperability for Microwave Access (WiMAX) is currently one of the
hottest technologies in wireless communication. It is a standard based on the IEEE 802.16 wireless
technology that provides a very high throughput broadband connections over long distances. In
parallel, Voice Over Internet Protocol (VoIP) is a new technology which provides access to voice
communication over internet protocol and hence it is becomes an alternative to public switched
telephone networks (PSTN) due to its capability of transmission of voice as packets over IP
networks. A lot of research has been done in analyzing the performances of VoIP traffic over
WiMAX network. In this paper we review the analysis carried out by several authors for the most
common VoIP codec’s which are G.711, G.723.1 and G.729 over a WiMAX network using various
service classes. The objective is to compare the results for different types of service classes with
respect to the QoS parameters such as throughput, average delay and average jitter.
IPTV Improvement Approach over LTE-WLAN Heterogeneous NetworksIJCNCJournal
IPTV (Internet Protocol Television) includes several video components. The IMS (IP Multimedia Subsystem) cannot differentiate between them what causes their treatment similarly. These sub-components must have different priorities because they have distinct QoS constraints. In this paper, we suggest the implementation of IPTV in a heterogeneous network that improved QoS by providing the capability to prioritize the sub traffic according to the system administrator policy. A new IPv6 flow label field definition was proposed that is ready for standardization. OPNET Modeler software is used to design our approached architecture. The results show that IPTV users receive different amounts of video data based on the stream's priority.
IPTV IMPROVEMENT APPROACH OVER LTEWLAN HETEROGENEOUS NETWORKSIJCNCJournal
IPTV (Internet Protocol Television) includes several video components. The IMS (IP Multimedia
Subsystem) cannot differentiate between them what causes their treatment similarly. These sub-components
must have different priorities because they have distinct QoS constraints. In this paper, we suggest the
implementation of IPTV in a heterogeneous network that improved QoS by providing the capability to
prioritize the sub traffic according to the system administrator policy. A new IPv6 flow label field
definition was proposed that is ready for standardization. OPNET Modeler software is used to design our
approached architecture. The results show that IPTV users receive different amounts of video data based
on the stream's priority.
Comparative Analysis of Quality of Service for Various Service Classes in WiM...Editor IJCATR
Broadband access is an important requirement to satisfy user demands and support a new set of real time services and
applications. WiMAX, as a Broadband Wireless Access solution for Wireless Metropolitan Area Networks, covering large distances
with high throughput and is a promising technology for Next Generation Networks. Nevertheless, for the successful deployment of
WiMAX based solutions, Quality of Service (QoS) is a mandatory feature that must be supported. Quality of Service (QoS) is an
important consideration for supporting variety of applications that utilize the network resources. These applications include voice over
IP, multimedia services, like, video streaming, video conferencing etc. In this paper the performances of the MPEG-4 High quality
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module developed based on popular network simulator NS-3 is used. Various parameters that determine QoS of real life usage
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QoS parameters, such as, throughput, packet loss, average delay and average jitter.
Analyzing Video Streaming Quality by Using Various Error Correction Methods o...IJERA Editor
Transmission video over ad hoc networks has become one of the most important and interesting subjects of study for researchers and programmers because of the strong relationship between video applications and frequent users of various mobile devices, such as laptops, PDAs, and mobile phones in all aspects of life. However, many challenges, such as packet loss, congestion (i.e., impairments at the network layer), multipath fading (i.e., impairments at the physical layer) [1], and link failure, exist in transferring video over ad hoc networks; these challenges negatively affect the quality of the perceived video [2].This study has investigated video transfer over ad hoc networks. The main challenges of transferring video over ad hoc networks as well as types of errors that may occur during video transmission, various types of video mechanisms, error correction methods, and different Quality of Service (QoS) parameters that affect the quality of the received video are also investigated.
RESOURCE ALLOCATION ALGORITHMS FOR QOS OPTIMIZATION IN MOBILE WIMAX NETWORKSijwmn
WiMAX is based on the standard IEEE 802.16e-2009 for wireless access in Metropolitan Area Networks. It
is one of the solutions for 4G IP based wireless technology. WiMAX utilizes Orthogonal Frequency
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Modulation and Coding Scheme. Presently, Scheduling and Resource allocation algorithm in Opportunistic
Layered Multicasting provides multicasting of layered video over mobile WiMAX to ensure better QoS.
Initially, the knowledge based allocation of subcarriers is used for scheduling. In addition, to reduce the
burst overhead, delay and jitter, SWIM (Swapping Min-Max) algorithm is utilized. Another promising
technology that can greatly improve the system performance by exploring the broadcasting nature of
wireless channels and the cooperation among multiple users is the Cooperative Multicast Scheduling
(CMS) technique. The simulation results show, Swapping Min-Max performs better with lesser number of
bursts, Zero jitter and with optimal throughput. The results with Cooperative Multicast Scheduling show
the enhanced throughput for each member in the Multicasting Scenario.
Radio Link Analysis for 4G TD- LTE Technology at 2.3 GHz FrequencySukhvinder Singh Malik
The Long Term Evolution (LTE) is the latest step in an advancing series of mobile telecommunications systems.
In this paper, authors show interest on the link budgeting the information presented here will help readers understand how the budgeting will be done in LTE. This paper provides
dimensioning of LTE for particular city.
This will provides the number of cell count. Here we tell about a GUI MATLAB System for calculation of no. of resources required to provide services in particular area with optimum cost and better quality.
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Performance Evaluation of Iptv over Wimax Networks Under Different Terrain Environments
1. International Journal of Engineering Inventions
e-ISSN: 2278-7461, p-ISSN: 2319-6491
Volume 2, Issue 2 (January 2013) PP: 21-25
www.ijeijournal.com P a g e | 21
Performance Evaluation of IPTV over WiMAX Networks
Under Different Terrain Environments
Jamil M. Hamodi, Ravindra C. Thool
Information Technology Department,
Shri Guru Gobind Singhji Institute of Engineering and Technology (SGGS)
Swami Ramanand Teerth Marathwada University (SRTM)
Nanded, INDIA
Abstract:- Deployment Video on Demand (VoD) over the next generation (WiMAX) has become one of the
intense interest subjects in the research these days, and is expected to be the main revenue generators in the near
future. In this paper, the performance of Quilty of Service of video streaming (IPTV) over fixed mobile WiMax
network is investigated under different terrain environments, namely Free Space, Outdoor to Indoor and
Pedestrian. OPNET is used to investigate the performance of VoD over WiMAX. Our findings analyzing
different network statistics such as packet lost, path loss, delay, network throughput.
Keywords:- H.264/AVC, IPTV, OPNET, QoS, SVC, WiMAX.
I. INTRODUCTION
Worldwide Interoperability for Microwave Access (WiMAX) technology is the only wireless system
capable of offering high QoS at high data rates for IP networks. The high data rate and Quality of Service (QoS)
assurance provided by this standard has made it commercially viable to support multimedia applications such as
video telephony, video gaming, and mobile TV broadcasting. System architecture to support high definition
video broadcasting (like H.264/AVC and SVC) that provides a mobility of 30 kmph in an urban and sub-urban
environment has been developed. Some aspects of cell planning for video broadcasting over WiMAX
communication system [3], [1]. There are attractive growth rates in WiMAX subscriber base and equipment
revenues, in market studies last years. 133 million subscribers will be supported at the end of 2012 [2].
WiMAX technology is one of the access technologies that enable transmission of IPTV services.. The
QoS for delivering IPTV services depends especially on network performance and bandwidth [4]. The generic
network topology of the IPTV application over WiMAX is shown in Fig. 1.
Fig. 1: System Model for IPTV Application [4]
Scalable Video Coding (SVC) has achieved significant improvements in coding efficiency with an
increased degree of supported scalability relative to the scalable profiles of prior video coding standards.
Transmitting SVC encoded videos over WiMAX networks is an effective solution which solves many of the
video transmission problems over these networks [5].
IEEE 802.16 Medium Access Control (MAC) specifies five types of QoS classes are: Unsolicited
grant services (UGS), which are designed to support constant bit rate services, such as T1/E1 and VoIP; Real-
time polling services (rtPS), which are used to support real-time variable bit rate services such as MPEG video
and VoIP; Non-real-time polling services (nrtPS), which are used to support non-real-time variable bit rate
services such as FTP; Best-effort services, which enable to forward packets on a first-in-first basis using the
2. Performance Evaluation of Iptv over Wimax Networks Under…
www.ijeijournal.com P a g e | 22
capacity not used by other services; Extended real-time variable rate (ERT-VR) service, which is defined only in
IEEE 802.16e, and is designed to support real time applications, that have variable data rates but require
guaranteed data rate and delay [6].
Path loss is an unwanted introduction of energy tending to interfere with the proper reception and
reproduction of the signals during transfer from transmitter to receiver. This environment between the
transmitter and receiver in a wireless communication system has an important effect on the performance and to
maintain QoS of the system. The path loss is an important element which must be kept within a predefined
range in order to get the expected performance of system. The aim of this study is to investigate the performance
of QoS of video streaming over fixed WiMax network under different terrain environments. The main
objectives of this research are: To study the importance of IPTV (VoD), and to identify the factors affecting the
VoD performance. Further, the study aims to simulate the WiMAX network with different propagation models
in order to investigate and analyze the behavior and performance of these models.
The rest of this paper is organized as follows: Section II describes our system. Video traffic
characteristics are described in Section III. Section IV describes simulation parameters. Simulation results and
analysis was obtained in Section V. The study concludes in Section VI.
II. SYSTEM DESCRIPTION
Our system was used is a fixed WiMAX system utilize OFDM over a 2.5 GHZ frequency, the system
utilizes TDD with 5 MHz channel bandwidth that provisions 512 subcarriers allocated. The base station was
configured to transmit power at 35.8 dBm which about 3.8 watts with 15 dBi gain antenna. Each client station
transmit power was configured to use 33 dB which around 2 watts of transmit power over the 5MHz channel
bandwidth using 14 dBi gain antennas. Moreover, the common propagation models for path loss used in this
system namely: Free Space path loss model, and the Outdoor to Indoor and Pedestrian Environment model. Free
Space path loss model was employed with a conservative terrain model with moderate to heavy tree density,
representing rural environments, and has highest path loss with ignoring the shadow fading. Outdoor to Indoor
and Pedestrian Environment model was employed with a conservative terrain model with moderate to heavy tree
density, representing rural environments and has highest path loss, with 10dB shadow fading.
III. VIDEO TRAFFIC CHARACTERISTICS
This section discusses some issues that come up when have been needed to deploy video in any
network. These issues are characterizing the nature of video traffic, and QoS requirements. The QoS
requirement is very important for deploying IPTV and VoD as realtime services. It is affected by packet loss,
packet reordering, packet faults latency, packet duplication,and delay jitter. Some of the key metrics that define
the level of service sustainable by a network upon a VoD deployment are as follows:
Packet End-to-end delay: Small amount of delay does not directly affect the Quality of Experience
(QoE) of IPTV. While the delay large than 1 second may result a much worse QoS toward end-user experience.
The delay for one way must be less than 200ms. On the other hand, the end-to-end delay more than 400ms was
considered to be unacceptable [7].
Packet loss: Average number of packets lost compared to send a packet per second. Packet lost in the
video processing layer is used for comparison purpose. There are some standard packet loss ratios given by
ITU-T for classifying IPTV services. The excellent service quality of packet loss ratio is than 10-5
and the poor
service quality of packet loss ratio is between 2*10-4
and 0.01 [7], a packet loss ratio above 1% is unacceptable.
Jitter: Calculated as the signed maximum difference in one way delay of the packets over a particular
time interval [8]. Generally, jitter is defined as the absolute value of delay difference between selected packets.
The jitter delay for one way must be less than 60ms on average and less than 10 ms in ideal [2].
Throughput: the rate at which a computer or network sends or receives data. It therefore is a good
measure of the channel capacity of a communication link and connections to the internet are usually rated in
terms of how many bits they pass per second (bit/s). The minimum end-to-end transmission rate acceptable for
video is between 10 kbps and 5 Mbps [2].
IV. SIMULATION
This section describes the simulation model adopted for analyzing the effect of Video on Demand
(VoD) over the WiMAX networks .The simulation was performed to evaluate the performance of VoD over the
WiMAX networks. Our simulation approach used the popular MIL3 OPNET Modeler simulation package1,
Release14.0.A [9]. We used the OPNET Modeler to facilitate the utilization of in-built models of commercially
available network elements, with reasonably accurate emulation of various real life network topologies.
The Wireless Deployment Wizard of OPNET is used to deploy a WiMAX network, with multiple
subscriber stations in the range of a base station as shown in Fig. 2. The base stations are connected to the core
network by an IP backbone. There is a server backbone containing the voice server which is configured as the
3. Performance Evaluation of Iptv over Wimax Networks Under…
www.ijeijournal.com P a g e | 23
video server. The IP backbone, server backbone together represent the service provider company network. The
cell radius is set to 1 kilometres. The remaining key network configuration parameters in OPNET are
summarized as in Table 1.
Fig. 2: OPNET Model of WiMAX Network
Table 1: Network Configuration Details
Network Fixed WiMAX Network
Cell Radius 1 Km
No. of Base Stations 1
No. of Subscriber Stations 5
IP Backbone Model Ip32_cloud
Video Server Model PPP_sever
Link Model (BS-Backbone) PPP_DS3
Link Model (Backbone-server Backbone) PPP_SONET_OC12
Physical Layer Model OFDMA 5 MHz
Traffic Type of Services Streaming Video
Application Real Video streaming
Scheduling rtPS
Video streaming over wireless networks is challenging due to the high bandwidth required and the
delay sensitive nature of video than most other types of application. As a result, a video traces of Tokyo
Olympics codec by SVC was used in our simulation. This traffic was obtained from Arizona State University
[10], [11], with a 532x288 from resolution, Group of Picture (GOP) size is selected as 16 for this video for all
codes, and encoded with 30 frames per seconds (fps).
Different scenarios have been designed in our simulation with different propagation models for the
SVC video streaming over WiMAX to investigate the combined effect of these propagation models on the
Quilty of Service (QoS) for video streaming over WiMAX in terms of: throughput, packet loss, path loss, and
packet end-to-end delay.
V. SIMULATION RESULTS AND ANALYSIS
Snapshots of OPNET simulation results for deploying VoD services over WiMAX with different
propagation models was presented in this section. The goal of our simulation was to test the deployment, and to
analysis the performance metrics IPTV (VoD) over WiMAX networks in different propagation models. The
simulation results of our model are averaged across the 74 minute movie. Average values of end-to-end delay,
path loss, packet loss, and throughput are used for the analysis in all the Figures.
In Fig. 3, we illustrate the corresponding streaming video end-to-end delay. As can be noted, that the
video packet end to end delay of the network with free space as the path loss model is the lowest. However, the
packet end-to-end is the highest for outdoor to indoor and pedestrian. This is due to the fact that as the density of
the building structures, the number of times the signal gets obstructed and reflected, trees or mountains
increases, and diffraction.
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Fig. 3: Averaged End-to-End packet delay
The results of throughput for video streaming that is used in this simulation as shown in Fig. 4. It is
observed that the throughput of the network with free space path loss model is the highest and the same for
outdoor to indoor and pedestrian is the lowest for video traffic. This is due to the fact that as the density of
obstacles increases, the Line of Sight (LOS) gets affected. As the Line of Sight (LOS) between the transmitting
and receiving nodes decreases, it causes delays. Thus the number of times the signal gets obstructed and
reflected is increasing. This results in increasing attenuation and diffraction due to the building structures, trees
or mountains, also this result caused in packet loss.
Fig. 4: Average throughput
Fig. 5 shows the path loss for Fress Space model that is around 100dB. Whereas, the path loss for the
Outdoor to Indoor and Pedestrian is around 145dB . This indicates that the path loss for outdoor to indoor and
pedestrian is the highest and the same for free space is the lowest. This is due to the fact that the path loss value
varies with the amount of reflection in the communicating path.
Fig.5: Path loss
The dropped packet rates by the PHY layer for the WiMAX Subscriber Station are shown in Fig. 6,
which exhibits a much higher loss rate in Outdoor to Indoor and pedestrians. The low SNR for the subscriber
station is a major contributor to the high packet loss rate.
Fig. 6: packet lost
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VI. CONCLUSION
This study explores the performance analysis of IPTV over WiMAX broadband access technology. Its
aim is to evaluate the effect of various path loss models, on the basis of average throughput and packet end to
end delay and path loss. The OPNET Modeler is used to design and characterize the performance parameters of
Tokyo Olympics video streaming under different terrain environment. The simulation results indicate that, free
space path loss model is a basic path loss model with all other parameters related to terrain and building density
set as constant. Furthermore, the streaming video content has been modeled as unicast traffic while multicast
video traffic may have yielded better performance. This work has limitations to certain assumptions like: Station
transmit power, distance between base station and subscriber station, subscriber station was configured as fixed
not support mobility, station antenna gain, carrier operating frequency and channel bandwidth.
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