multiple access methods ppt

Ngày tải lên: 20/06/2014, 04:20

Ngày tải lên: 21/06/2014, 22:20

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 22/06/2014, 01:20

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 07/08/2014, 21:20

Ngày tải lên: 13/08/2014, 10:20

... Baey, Fladenmuller – Subject 5 MOB Subject 5 Access methods Static and dynamic access techniques 1. Static access techniques 1.1 Space-division multiple- access (SDMA) When one seeks to cover a broad ... η a  1. 1.3 Time Division Multiple Access (TDMA) In the traditional local networks, a physical support is sharing between several users. It is thus important to define the access rules of the media ... solutions are simple to introduce, but suffer from a very low yield. You lose the multiplexing gain! 3. Dynamic access techniques Pure Aloha: the principle of Aloha is to let talk to everyone when...

Ngày tải lên: 17/09/2012, 09:13

... Standards 46 2.6 Summary 48 3 Multiple Access in Cellular Communication Systems 49 3.1 Multiple Access and the OSI Layers 49 3.2 Basic Multiple Access Schemes 53 3.3 Medium Access Control in 2G Cellular ... with multiple access protocols,which govern access to these resources. The basic multiple access schemes are briefly described further below in this section, and the importance of the multiple access ... Medium Access Control is Required 57 3.3.2 Medium Access Control in GSM 58 3.4 MAC Strategies for 2.5G Systems and Beyond 59 3.4.1 On the Importance of Multiple Access Protocols 59 3.4.2 Medium Access...

Ngày tải lên: 02/03/2013, 16:59

... Fiber Loop Converters, 192 T1/E1 circuits can be viewed. For larger networks, the GUI EMS allows multiple MAPs to be displayed at a single console. The MAP can be connected to the SNMP network ... Second, the MAP has an RS-232C interface that supports point-to-point protocol (PPP) for remote access using a modem. Forty-eight alarm contact closure inputs are provided by the MAP. These inputs ... proxy agent supports Telnet connections to each of the subscriber ports. This enables full remote access to the Soneplex platform craft interface. Description Application Soneplex MAP LAN Soneplex ECX Fractional...

Ngày tải lên: 10/12/2013, 16:15

... system. 14 12/02 • 517 Data Management and Access Products www.adc.com • +1-952-938-8080 • 1-800-366-3891 EIA-530 PatchMate ™ Modules  FRONT ACCESS PANEL DTE FRONT ACCESS PANEL DCE TEST EQUIP BREAKOUT MODULE INDICATORS MONITOR CIRCUITS TEST CIRCUITS Breakout ... Module without LEDs  FRONTACCESS PANEL DTE FRONT ACCESS PANEL DCE TEST EQUIP BREAKOUT MODULE PMBP-530-1 (R) • Available for connecting, disconnecting, cross-connecting, accessing, patching, monitoring ... Management and Access Products www.adc.com • +1-952-938-8080 • 1-800-366-3891 EIA-232/V.24 PatchMate ™ Modules  FRONT PANEL ACCESS- 1 TEST EQUIP-2 MONITOR CIRCUITS FRONT PANEL ACCESS- 2 TEST EQUIP-1 INTERFACE MODULE Interface...

Ngày tải lên: 10/12/2013, 17:15

... /home/grog/public_html,myweb pages, for read-only access. rsyncd accesses the module as user grog.Any host on the 256 address block starting with 223.147.37.0 can access the data. • Module tivo makes available ... virtual host, the server will access the main web pages (defined by the main DocumentRoot in entry /usr/local/etc/apache /access. conf ). Log file format httpd logs accesses and errors to the files ... 512 Jun 314:03 pub This enables read access to the pub directory and read-write access to the incoming subdirectory. • If you have a lot of files that are accessed relatively infrequently,it’spossible...

Ngày tải lên: 11/12/2013, 00:15

... ready to cut in the new access list version, we use access list 2 as a new access group: line vty 0 4 access- group 2 in If you reserve two access list numbers per access list, you can switch ... using no access- list at the start of the configuration file, build any new access list versions using a different access list number. In our previous example, we build access list 2: access- list ... set map to actual access lists? Here is the mapping: access- list 1 permit 192.168.30.1 access- list 1 permit 192.168.33.5 access- list 1 deny 0.0.0.0 255.255.255.255 Cisco IOS Access lists ...

Ngày tải lên: 11/12/2013, 00:15

... leaving the accounting details for Chapter 11. AAA access control provides much greater scalability and functional- ity than the basic access control methods discussed in Chapter 3. AAA can use local router ... from multiple vendors usually choose RADIUSfor its interoperability. Finally, organizations with existing Kerberos access servers can configure their routers to use those servers to control access ... information if using an access control server (ACS). 3. Define methods that specify the type and order of authentication with the aaa authentication command. 4. Apply the authentication methods to each...

Ngày tải lên: 11/12/2013, 13:15

... These methods give learning rules that resemble the ones in the previous section, but now instead of the gradient of J (w) only, the gradient of L(w 1 ::: k ) will be used. 3.3.2 Projection methods In ... descent methods, in which the gradient of an appropriate contrast function is computed and used as such in the algorithm. 3.2.2 Second-order learning In numerical analysis, a large number of methods ... Typically, the cost functions have the form J (w)= E fg (w x)g (3.28) 76 GRADIENTS AND OPTIMIZATION METHODS 3.6 Consider a cost function J (w)=G(w T x) where we can assume that x is a constant vector....

Ngày tải lên: 13/12/2013, 14:15

... event handler methods assigned to objects are removed when the object leaves the scene (or is otherwise removed). If the object appears in the scene again, any event handler methods will need ... handler methods are much different from regular events, and if there are any advantages of using one over the other. That's what we'll discuss next. NOTE Event handler methods play...

Ngày tải lên: 14/12/2013, 22:15

... Comparing Fields and Methods First, let's recap the original motivation for using methods to hide fields. Consider the following struct that represents ... ScreenPosition constructor range checks its parameters, but no such check can be done on the “raw” access to the public fields. Sooner or later origin.X += 10; There is no doubt that, in this case,...

Ngày tải lên: 15/12/2013, 00:15

... lên Rule Web Group KD và chọn Tab Schedule 14 of 29 Trong Access Rule Sources chọn duy nhất 1 thuộc tính là Internal Tương tự trong Access Rule Destinations chọn duy nhất 1 thuộc tính là External Trong ... truy cập được mọi trang Web 20 of 29 Tiếp tục chọn Next Trong Access Rule Sources chọn duy nhất 1 thuộc tính là Internal Tuy nhiên trong Access Rule Destinations ta không chọn thuộc tính là External ... 21 để truy cập các dịch vụ HTTP, HTTPS, FTP mà thôi. Trong Access Rule Sources chọn duy nhất 1 thuộc tính là Internal Tiếp đến trong Access Rule Destinations ta không chọn thuộc tính là External...

Ngày tải lên: 17/12/2013, 11:15

... DNS Query để phân giải tên miền B1: ISA Management è Firewall Policy è New è Access Rule B2: Gõ “DNS Query” vào ô Access Rule Name è Next B2: Dòng name đặt tên “vnexpress” Chọn New, khai 2 ... chọn properties của rule vừa tạo è Schedule è Giai Lao B4: Chọn Allow Limmitted Web Access B5: Mở rule Web Access Only. Khảo sát các thông số Bài viết này thuộc quyền sở hữu Trung Tâm Đào Tạo ... Protocols” è Add è Common Protocol è DNSè OK è Next B5: Trong Access Rule Source” è Add è Networks è Internal è add è Close è Next B6: Trong Access Rule Destination” è add è Networks è External...

Ngày tải lên: 17/12/2013, 13:15

... Telecommunications Access Guideline 2002. August 2002 39 2. PROPOSED BUILDING ACCESS TERMS Relationship of building access agreement with existing regulation In many instances, a building access ... for access control arrangements to deal with changes such as changes in the listing of authorised personnel, provision of access to new Digital River – Digital Building Telecommunications Access ... 2.9 Specific conditions of site access The building owner/manager may wish to impose specific conditions relating to who may or may not have access to the site, access procedures, security requirements...

Ngày tải lên: 20/12/2013, 22:15