securing the ieee 802 11 wireless lans

... to Performance Analysis Approach of the IEEE 802.11 EDCA in Wireless Multi-hop Networks Minh Trong Hoang*, Minh Hoang, Duc Cong Le Abstract The IEEE 802.11e standard has been introduced to ... Keywords: IEEE 802.11e EDCA, Virtual collision, Multi-hop network, Hidden node, Markov chain. 1 Introduction The IEEE 802.11 has become ubiquitous and gained widespread popularity for wireless ... (TXOP) In the recent years, a large body of work has appeared in the literature to investigate performance of IEEE 802.11e EDCA through analytical models Most of them focused on the impacts of the

Ngày tải lên: 17/03/2021, 20:27

... Windows and explain the non-Ethernet driver features in some detail I selected two 802.11 cards as examples: the Nokia C110/C111 and the Lucent ORiNOCO While not particularly common, the Nokia card ... does At the top of the dialog box there are fields for selecting the SSID (network name) and the key number to which the key applies The bottom part of the screen shows the key length and the key ... Schiller's Ode to Joy for transmission over an 802.11a network.[2] Shortly after 802.11a was published, the IEEE 802.11 working group discovered several errors in the example and published a correction

Ngày tải lên: 14/08/2014, 13:20

... to calculate the upper bound of the TCPthroughput in a static 802.11 based linear ad hoc network under the ideal situation wherethere is no packet loss Then, we further investigate the property ... that the interaction of TCP layer with the underlying MAC layerplays a critical role in the TCP performance in MANETs The prevailing MAC protocolused today is IEEE 802.11 MAC protocol with the ... MANETs.In this thesis, we focus on the interaction between TCP and IEEE 802.11 MAC protocol, andinvestigate 802.11’s inadequacy in handling multiple packet losses which seriously deterioratethe TCP

Ngày tải lên: 13/09/2015, 21:25

... DFS ► IEEE 802.11i: Supplementary MAC Standard: Alternative WEP ► IEEE 802.11n: 100 + Mbps : Enhancement to 802.11g using MIMO ► IEEE 802.11s : mesh networking extension Trang 8IEEE 802.11 Architecture ... Trang 7IEEE 802.11 Protocols► IEEE 802.11a: PHY Standard : 8 channels : 54 Mbps : 5 GHz band: OFDM ► IEEE 802.11b: PHY Standard : 3 channels : 11 Mbps : 2.4 GHz band: FHSS, DSSS ► IEEE 802.11d: ... control ► security Trang 19IEEE 802.11 Protocol Architecture802.11 2.4 GHz FHSS 802.11 2.4 GHz DSSS 802.11 Ird 802.11a 5 GHz OFDM 802.11g 2.4 GHz OFDM 802.11b 2.4 GHz DSSS Distributed Coordination Function (DCF)

Ngày tải lên: 05/07/2022, 13:17

... If IEEE 802.1X authentication is used, the EAP authentication process starts when the AP’s Authenticator sends the Request or the STA’s Supplicant sends the EAPOL-Start message EAP-► EAP authentication ... between the Supplicant and AS via the Authenticator and Supplicant’s Uncontrolled Ports ► The Supplicant and AS authenticate each other and generate a PMK The PMK is sent from the AS to the Authenticator ... logins by other users within the domain Trang 14 Mutual Authentication► 802.11 shared authentication not mutual • Client authenticates to Access Point but Access Point does not authenticate

Ngày tải lên: 05/07/2022, 13:18

... describes IEEE 802.11 Wireless Local Area Network (WLAN) Standard It describes IEEE 802.11 MAC Layer in detail and it briefly mentions IEEE 802.11a, IEEE 802.11b physical layer standard andIEEE 802.11e ... network destination • The integration service connects the IEEE 802.11 WLAN to other LANs, The integration service translates IEEE 802.11 frames to frames that may traverse another network, and vice ... indicates the capability of the station to send and receive the PBCC of IEEE 802.11b.The channel agility subfield indicates that the station is using the channel agility option of IEEE 802.11b.Current

Ngày tải lên: 09/03/2014, 13:20

... dây là : IEEE 802.11b, IEEE 802.11a, IEEE802.11g e© Chuan IEEE 802.11b Release | Op Data rate | Data Rate | Range (Indoor) Date Frequency (Typ) (Max) 1999 2.4GHZ 6.5 Mbit/s 11 Mbit/s ... truyền thông Chuẩn IEEE 802.11 được xây dựng vào năm 1997, chuẩn này được đưa ra cho những thiết bị của hệ thống WLAN hoạt động ở lớp vật lý Chuẩn IEEE 802.11 hoạt động theo hai mode đó là ... s+zsccscksrkereerxee Trang 84 Kết luận 2° óc E1 AE E111 ererrkd Trang 111 60 c0) ii 0i nh Trang 112 Thuật ngữ Viết tắt -2.2-2s-2s SE TH HH EErgreerkrrerrkeee Trang 113 Trang 9Danh sach cac hinh 1.1 Sơ đồ

Ngày tải lên: 28/04/2014, 10:49

... is how to obtain the IP address of the DHCP server in the target network In the proposed CF-SIP [10], the MAC address of the gateway of the target network is encapsulated into the beacon frames ... MN to then access the network following by the IP address re-allocation phase Then the MN retrieves a new IP address via DHCP Finally, the network configuration is changed accordingly and the MN ... potential problem is that the MN may not be granted to access to the target network after the disassociation If the access request is denied by the target AP during the CAC phase, the traditional handoff

Ngày tải lên: 21/06/2014, 02:20

... Cis the number of ACs andM is the retransmission limit After the Mth retransmission attempt the frame is dropped Table 1 contains the standard values of the EDCA parameters for IEEE 802.11 HR/DSSS ... contribution to the area of EDCA models and backoff misbehaviour We verify the model by simulations and show that it outperforms three other IEEE 802.11 models The presented model can be used in game theoretical ... correctly for these scenarios The proposed model can, therefore, be considered as an original contribution to the area of EDCA models and backoff misbehaviour 1 Introduction The IEEE 802.11 standard

Ngày tải lên: 21/06/2014, 11:20

... 7 2 Overview of the IEEE 802.11 and the IEEE 802.16 MAC Protocols 2.1 IEEE 802.11 MAC Protocol In the IEEE 802.11 WLANs, the MAC layer defines the procedures for the IEEE 802.11 stations to share ... of the IEEE 802.16 networks for the wireless backhaul connecting the Internet to a number of local IEEE 802.11 networks Figure 1shows a typical scenario for the IEEE 802.16 and the IEEE 802.11 ... allocation for the IEEE 802.16 and the IEEE 802.11 MAC protocols Precisely, we analyzed the IEEE 802.11 and the IEEE 802.16 MAC proto-cols, frame structures, and proposed to embed multiple IEEE 802.16

Ngày tải lên: 21/06/2014, 11:20

... and the power used by the WLANdevices, the conservation of which requires focus as many of the WLAN devicesare mobile The use of these resources in WLANs is optimized by either modify-ing the ... Ratio WLANs Wireless Local Area Networks xii Trang 13Chapter 1Introduction In today’s world, the usage of wireless LANs (WLANs) has become very commonand widespread Hence the conservation of the ... details on the optimization of ageneral RPPA system Chapter 6 describes the optimization of RPPA for IEEE802.11a/g [1], the numerical simulations involved and the results obtained Thenext two

Ngày tải lên: 16/10/2015, 15:35

... CHƯƠNG III các chuẩn IEEE 802.11 18 3.1 Nguồn gốc ra đời của chuẩn IEEE 802.11 18 3.2 IEEE 802.11b 18 3.3 IEEE 802.11a 20 3.4 IEEE 802.11g 21 3.5 IEEE 802.11i 22 3.6 IEEE 802.11n 22 CHƯƠNG IV THIẾT ... nay có rất nhiều sản phẩm phục vụ cho WLAN theocác chuẩn khác nhau như: IrDA (Hồng ngoại), OpenAir, BlueTooth, HiperLAN 2, IEEE802.11b, IEEE 802.11a, 802.11g (WiFi), trong đó mỗi chuẩn có mộtđặc ... Năm 1999, IEEE thông qua hai sự bổ sung cho chuẩn 802.11 là cácchuẩn 802.11a và 802.11b (định nghĩa ra những phương pháp truyền tín hiệu).Và những thiết bị WLAN dựa trên chuẩn 802.11b đã nhanh

Ngày tải lên: 04/04/2016, 08:24

... đánh giá chung về Hỗ trợ truy nhập băng tần cấp phép - Licensed-assisted access (LAA) LTE với IEEE 802.11 Giảng viên hướng dẫn: TS Đình Chí Hiếu Nhóm SV thực hiện: Trần Duy Hà Nguyễn Thị Thanh Hòa ... đánh giá chung về Hỗ trợ truy nhập băng tần cấp phép - Licensed-assisted access (LAA) LTE với IEEE 802.11 Tóm tắt: Licensed-assisted access (LAA) là chế độ hoạt động mới của LTE trong phổ tần không ... và theo dõi thời gian-tần số hiện đang được hỗ trợ trong LTE Thời gian và theo dõi tần số xem xét như là một ví dụ, các UEs yêu cầu cácđể ước lượng thời gian và tần số định kỳ Một bộ lọc / theo

Ngày tải lên: 12/12/2016, 09:35

... technologies: IEEE 802. 11a, 802. 11b, 802. 11g, and 802. 11n In addition, a brief overview of the updated security standard for IEEE 802. 11 networks, IEEE 802. 11i, is provided 2.1 IEEE 802. 11 Variants ... techniques, such as IEEE 802. 11a, 802. 11b, and 802. 11g; any future IEEE 802. 11 standard will also be compatible with IEEE 802. 11i Table 2-1 Summary of IEEE 802. 11 WLAN Technologies IEEE Standard or ... lists legacy IEEE 802. 11 WLAN references Appendix E lists legacy IEEE 802. 11 WLAN online resources 1-2 GUIDE TO SECURING LEGACY IEEE 802. 11 WIRELESS NETWORKS Overview of IEEE 802. 11 Wireless Local...

Ngày tải lên: 14/02/2014, 08:20

... the author One slot time is microseconds in IEEE 802. 11a wireless LANs In Figures 4, 5, 6, 7, 8, 9, 10, 11, and 12, we present the simulation results of the maximum delay bounds of IEEE 802. 11a ... bounds when the heavy traffic load (B = 8) is imposed on IEEE 802. 11a wireless LAN with 30 STAs Figure 11: Mean delay bounds when the medium traffic load (B = 5) is imposed on IEEE 802. 11a wireless ... (B = 11) is imposed on IEEE 802. 11a wireless LAN with 20 STAs Figure 8: Mean delay bounds when the medium traffic load (B = 7) is imposed on IEEE 802. 11a wireless LAN with 30 STAs of thirty wireless...

Ngày tải lên: 21/06/2014, 23:20

... forth The simulator closely follows all timer values and packet element transmission times defined by IEEE 802. 11 specifications Furthermore, we have suitably modified the model of the IEEE 802. 11 wireless ... include the finite packet retry limits as defined in the IEEE 802. 11 standard [2] In [7], we provide a new performance analysis of the 802. 11 protocol, which is based on the extensively-used-in -the- literature ... the performance of the IEEE 802. 11 protocol, namely, the throughput efficiency, the average packet delay, the packet drop probability as well as the average time to drop a packet By employing the...

Ngày tải lên: 23/06/2014, 00:20

... differentiation to analyze the throughput and delay of the IEEE 802. 11e However, the impact of AIFS differentiation is not covered The proposed analytical model in [5] use the AC-specific EDCA cycle ... Conclusion This paper presented the analytical model which is enhanced from the model of 802. 11 DCF based on Markov chains to analyze the performance of IEEE 802. 11e EDCA in multihop networks By ... analysis of the IEEE 802. 11e EDCA saturation, IEEE International Conference on Communications, (2005), pp 3450- 3454 Peng F., Peng B., and Qian D., - Performance analysis of IEEE 802. 11e enhanced...

Ngày tải lên: 13/08/2015, 10:00

... of nodes and the collision probability, respectively The DCF curve uses the standard IEEE 802. 11 algorithm, and the curve for IEEE 802. 11+ uses the algorithm presented in [4] where the number of ... 500 Bytes: IEEE 802. 11+ vs DCW (d) 1500 Bytes: IEEE 802. 11+ vs DCW (f) 2312 Bytes: IEEE 802. 11+ vs DCW Figure Normalized throughput (a) 500 bytes: DCF versus DCW (b) 500 bytes: IEEE 802. 11+ versus ... uses the standard IEEE 802. 11 algorithm, and the curve for IEEE 802. 11+ uses the algorithm presented in [4] where the number of nodes is known Similar results are obtained for the different packet...

Ngày tải lên: 20/06/2014, 22:20

... in the access point and wireless stations is included in the 8021 1MgmtAP-STSF and 8021 1MgmtSTASTSF sublayers, respectively The structure of the 8021 1-ACFNC-NIC for the access point including the ... implement the STSF, we created a new management sublayer in the 8021 1ACFNC-NIC for the wireless stations and access point which are called 8021 1MgmtSTA-STSF and 8021 1MgmtAPSTSF, respectively The ACFNC ... q: # NetworkLayer 8021 1 ACFNC NIC pingApp q: # Radio 8021 1 ACFNC MAC 8021 1 MgmtAP STSF Figure 5: Structure of the protected 8021 1-ACFNC-NIC in the simulation environment B the percentage of performance...

Ngày tải lên: 21/06/2014, 05:20

... an 802. 11b AP (cAP) on channel number On the other hand, there exists a neighbor 802. 11b AP (nAP) on channel number 11 which is orthogonal to that of the cAP The nAP is a target to measure the ... since the loaded traffic on the 802. 11b APs ( 11 Mbps) is less than that on the 802. 11a APs (≤54 Mbps) so that the utilization remains in about 60% On the other hand, the average utilization of ... each of these individually occupies about Mbps bandwidth on the cAP) On the other hand, in the BSS2, a neighbor AP (nAP) supports 802. 11a Relatively lower RSSI of the nAP is acceptable for the STA...

Ngày tải lên: 21/06/2014, 23:20