multiple access techniques ppt
MOB Subject 5 –Access methods Static and dynamic access techniques
Ngày tải lên :
17/09/2012, 09:13
... 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 ... 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 ... 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...
12
672
8
Multiple Access Protocols for Mobile Communications - GPRS, UMTS and Beyond
Ngày tải lên :
02/03/2013, 16:59
... 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 ... individual portions of
its resources to support multiple communications, basic multiple access techniques (such
as frequency-, time-, or code-division multiple access, with FDMA, TDMA, and CDMA
as their...
478
664
0
Tài liệu SONEPLEX SNMP MANAGEMENT ACCESS POINT pptx
Ngày tải lên :
10/12/2013, 16:15
... 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...
4
284
0
Tài liệu Data Management and Access Products ppt
Ngày tải lên :
10/12/2013, 17:15
... 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...
68
600
0
Tài liệu Chapter-25-Basic network access-servers ppt
Ngày tải lên :
11/12/2013, 00:15
... /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...
24
328
0
Tài liệu Cisco Ios Access Lists pptx
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 ... example, we build access list 2:
access- list 2 permit 192.168.30.1
access- list 2 permit 192.168.33.5
We then read in access list 2 via TFTP (note that we can define and maintain access lists on ... 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
...
227
428
0
Tài liệu AAA Access Control ppt
Ngày tải lên :
11/12/2013, 13:15
... 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 ... AAA, 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 ... rights reserved.
AAA Security Checklist
|
51
Token-Based Access Control
An authentication method that offers additional security is token-based access con-
trol. With this method, each user has a...
9
655
0
Tài liệu CUSTOMER SATISFACTION USING DATA MINING TECHNIQUES ppt
Ngày tải lên :
11/12/2013, 23:15
... criteria.
Prediction level is quite satisfactory resulting that data mining techniques can be successfully combined
with multiple criteria methods.
Using other customer characteristics, such as ... patterns of information in data’ (Parsaye, 1997).
Figure 2: Rule Induction process
Data mining techniques are based on data retention and data distillation. Rule induction models (Figure
2) belong ... on the criteria (relative importance),
• average satisfaction indexes.
RULE BASED DATA MINING TECHNIQUES
The objective of data mining is to extract valuable information from one’s data, to discover...
4
434
1
Tài liệu CIRED 2003 - Round Table on Magnetic Field Mitigation Techniques ppt
Ngày tải lên :
13/12/2013, 19:15
... theory to practical implementation
Jean Hoeffelman
ELIA
General field mitigation techniques
General field mitigation techniques
Metallic shielding
Shielding by ferromagnetic materials
Mainly effective ... substation and possible
techniques to apply are: phase cancellation, conductive and
ferromagnetic shielding, passive and active compensation.
The methods used to carry out the mitigation techniques
are ... cables
A.S. Farag et alii
Electric Power System Research 48 (1999) pp 193-209 - Elsevier
[ 0] Shielding Techniques to Reduce Magnetic Fields Associated with
Underground Power Cables
G. Bucea, H. Kent
CIGRE...
31
454
0
Tài liệu Hotel Valuation Techniques pptx
Ngày tải lên :
15/12/2013, 06:15
... discussion of all of the techniques. Each method is illustrated by a unified case study that allows for meaningful comparison of
the techniques.
Case Study Example and Valuation Techniques
The Major ...
Cost-Approach (technique 9) $38,170,000
With the exception of room-rate multiplier (technique 2), the techniques produce values that are in a very narrow range, from
$36,395,000 to $38,625,000. The ...
The income approaches evolve from two different manners of thinking. The "cap-rate" techniques band of investment, market-
derived capitalization, and EVA—are single-period models...
20
280
0
Tài liệu Part 38 - ISA Server - Access Rule ppt
Ngày tải lên :
17/12/2013, 11:15
... 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...
29
382
3
Tài liệu ACCESS RULE ppt
Ngày tải lên :
17/12/2013, 13:15
... 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...
14
254
2
Xem thêm