... the
number of variables, l is the length of f, α is the maximum of the degrees
of the polynomials P
ij
, β is the maximum of the degrees of the functions in
P,and s is the number of the functions ... lengths of curves contained in a disk,
the areas of surfaces in a ball, or generally, the Hausdorff measures of subsets
of a ball, one can see that if the numbers of points of the intersections of ... BOUNDS OF HAUSDORFF MEASURES OF TAME SETS 49
[L2] T.L.Loi, Stratification of families of functions definable in o-minimal structures, Acta
Math. Vietnam, Vol. 27, 2, 2002, 239 -244.
[L3] T.L.Loi,...
... number of bits
o Example - weights w
i
l flow 1 weight 2 flow 2 weight 1 flow 3 weight 3
l 1 /3 1/6 1/2
∑
=
i
i
w
w
i
Cx
C : link capacity
Queue Management
17
Priority Queue
o Several queues of different ... eg. ToS field of IP
o Problem
l how to avoid everybody sendinghigh priority packets?
Queue Management
1
Quality ofService in IP
Networks
CH-1015 Ecublens
http://icawww.epfl.ch
Prof. Jean-Yves ... Fast Retransmit
o Probability p of choosing a given flow is proportional to the rate of the
flow
l more packets of that flow, higher probability of choosing one of its packets
Queue Management
16
FIFO
o...
... information instead of when a packet arrives. The
140
Chapter 9. QualityofService
Quality ofservice (QoS) is an often-used and misused term that has a variety of meanings. In this book, QoS
refers ... of voice quality.
Table 9-4. Results for Test A
Bandwidth Saturation (Percent) Delay (ms) PSQM Delay /QoS (ms) PSQM /QoS
0 76 1. 43 76 1. 43
40 233 1.94 106 1.5
60 242 2.1 104 1. 43 ...
functions to achieve the best QoS possible.
Cisco offers many tools for implementing QoS. In some scenarios, you can use none of these QoS tools and
still achieve the QoS you need for your applications....
... www.adc.com
From North America, Call Toll Free: 1-800 -36 6 -38 91 • Outside of North America: +1-952- 938 -8080
Fax: +1-952-917 -32 37 • For a listing of ADC’s global sales office locations, please refer to our web ...
Panel
FP 3: 1
RP 3: 1
Host 1
Host 2
Host 3
BTS
Sector
1
Interface
Panel
FP 2:1
RP 2:1
Host 4
Host 5
Remote
1
Remote
2
Remote
3
Remote
4
Remote
5
A
N
N!
B=
i
i!
i=0
N
A
∑
Improving Grade ofService ... new architecture reduced by 30 percent or
more of the total number of RF channels required on a
multiple link transport system for a specified amount of
user grade of service. The percentage reduction
depended...
... avoidance, additive increase
24. 23
24-5 QUALITYOF SERVICE
24-5 QUALITYOFSERVICE
Quality ofservice (QoS) is an internetworking issue
Quality ofservice (QoS) is an internetworking issue
that ... provide qualityof
Two models have been designed to provide qualityof
service in the Internet: Integrated Services and
service in the Internet: Integrated Services and
Differentiated Services. ... Four cases of congestion
24.2
24-1 DATA TRAFFIC
24-1 DATA TRAFFIC
The main focus of congestion control and qualityof
The main focus of congestion control and qualityof
service is
service is...
... 105
5.9 References 106
6 Qualityofservice 107
6.1 Introduction 107
6.2 Routing in mobile ad hoc networks 110
6 .3 Routing with qualityofservice constraints 112
6.4 Qualityofservice routing in ... associated with providing qualityofservice (QoS) in
ad hoc networks. It should be pointed out that security and qualityof service
are two distinct attributes that are independent of each other in general. ... enumerated in Section 1 .3 above are potential sources of
service impairment in ad hoc networks and hence may degrade the ‘ quality of
service ’ seen by the users. As of now, the Internet has...
... offered traffic loads in Figure
12. While for an offered traffic of3 Mbit/s all schemes
achieve similar good fairness va lues, for high traffic
0 1 2 3 4 5 6 7 8
0
0.05
0.1
0.15
0.2
0.25
0 .3
0 .35
0.4
0.45
0.5
Aggregate ... 2011, 2011:9
http://jwcn.eurasipjournals.com/content/2011/1/9
Page 7 of 13
RESEARCH Open Access
Quality ofservice implications of power control
and multiuser detection-based cross-layer design
Ulrike ... rate; PBOA: Progressive
Backoff Algorithm; PHY: physical layer; QoS: qualityof service; SINR: signal-to-
interference-and-noise-ratio.
Author details
1
Institute of Communication Networks, Technische...
... Conference on ICC, pp. 36 3 _36 8 Vol. 1.
[18] Nortel Networks,Introduction to qualityofservice (QoS) (September 2008), Nortel
NetworksWebsite, 20 03. [Online]. Accessed on 1st of September 2008. ... perform scheduling services, so
that the QoS requirements of the connections can be satisfied.
3. 1 What is QoS?
QoS refers to the ability of a network to provide improved service to selected ... Journal Vol.
15, No. 4, pp. 576-5 83.
Quality ofService and Resource Allocation in WiMAX
100
0
500
1000
1500
2000
2500
30 00
35 00
30 0 800 1400 1900 2400 2900 34 00
Throughput
Traffic Load
UGS
...
... and its evolutions have been included as
part of 3GPP specifications ((3GPP-TS- 43. 318, 2007) and (3GPP-TR- 43. 902, 2007)) to enable
the integration of cellular technologies and other RATs.
It appears ... terminals,
where the issue of out -of- order packet delivery is more critical owing to the higher traffic load
that usually characterizes the downlink phase.
134
Quality ofService and Resource Allocation ... the curve reported in Fig. 3.
138
Quality ofService and Resource Allocation in WiMAX
Downlink Resource Allocation and Frequency Reuse Schemes for WiMAX Networks 23
M. Maqbool, M. Coupechoux...
... satisfy
QoS constraints of each connection. The mapping mechanism is left to the choice of the
provider.
3. State of the art
3. 1 Bandwidth sharing strategies: background
To maintain a qualityofservice ... reasons of clarity and simplification of the presentation.
Considering the permutation BAMC 1
×6, the format of the OFDMA slot is 8 data subcarriers
of 6 OFDM symbols. The total number of OFDMA ... defines a
concept of a service flow. A service flow is a unidirectional flow of packets with a particular
set ofQoS parameters and is identified by a service flow identifier (SFID). The QoS parameters
could...