無無無無無無無無無無無無無無無無無無無無無無 (Adaptive bandwidth allocation strategy and performance evaluation for GPRS cellular networks) Speaker: Pei-Ni Tsai Adviser: Dr. Kai-Wei Ke
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Transcript
Slide 1
Speaker: Pei-Ni Tsai Adviser: Dr. Kai-Wei Ke
Slide 2
Outline Introduction Hierarchical Resource Allocation Resource
Allocation Complete share Guard External blocking Numerical
Analysis and Simulation Remain work Reference 2
Slide 3
Introduction 3 Fig. 52-multiframe structure
Slide 4
Introduction (Cont.) 4 Fig. 52-multiframe for four time
slots.
Complete share GPRS_TS: GPRS Time slot j: Type 1 user k: Type 2
user b 1 : Type 1 user Time slot b 2 : Type 2 user Time slot Radio
blocks R = j b 1 + k b 2 7
Slide 8
Guard 8 g: TS handover Radio blocks
Slide 9
External blocking P eb : external blocking probability 9
Slide 10
Numerical Analysis and Simulation(CS) packet call 1 packet
packet length exponential distribution L 1, L 2 coding scheme 2
radio block 240bits 10
Slide 11
Numerical Analysis and Simulation Type Packet call is Poisson
arrival Service time is exponential distribution packet call 1
packet packet length exponential distribution State space S =
GPRS_TS: GPRS Time slot Capacity C = GPRS_TS 12(Radio blocks) i :
Time slot j: Type 1 user k: Type 2 user b 1 : Type 1 user Time slot
b 2 : Type 2 user Time slot Radio blocks R = j b 1 + k b 2 11
Slide 12
Numerical Analysis and Simulation(CS) GPRS_TS = 3 Type 1: class
1 (1+1) Type 2: class 2 (2+1) b 1 = 1 b 2 = 2 1 = 1n + 1h 2 = 2n +
2h 1(i,j,k), 2(i,j,k) 12
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13
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Numerical Analysis and Simulation(CS) a = min (GPRS_TS i, b 1 )
b = min (GPRS_TS i, b 2 ) c = max (i (R b 1 ), 0) d = max (i (R b 2
), 0) 14
Slide 15
Time slot Allocate 15
Slide 16
Numerical Analysis and Simulation(CS) E1: Average Radio Blocks
of Type 1 E2: Average Radio Blocks of Type 2 16
Slide 17
Numerical Analysis and Simulation(CS) E = F = P b1n : blocking
probability of type 1 new call P b1h : dropping probability of type
1 handover P b2n : blocking probability of type 2 new call P b2h :
dropping probability of type 2 handover U: Utilization 17
Slide 18
Numerical Analysis and Simulation(G) G = g GPRS_TS g: TS
handover Radio blocks 18
Slide 19
Numerical Analysis and Simulation(G) a = min (GPRS_TS i, b 1 )
b = min (GPRS_TS i, b 2 ) c = max (i (R b 1 ), 0) d = max (i (R b 2
), 0) 19
Slide 20
20
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Numerical Analysis and Simulation(G ) E = E =E = F = F =F =
21
Slide 22
Numerical Analysis and Simulation(EB) P eb : external blocking
probability 22
Slide 23
Numerical Analysis and Simulation(EB) a = min (GPRS_TS i, b 1 )
b = min (GPRS_TS i, b 2 ) c = max (i (R b 1 ), 0) d = max (i (R b 2
), 0) 23
Slide 24
Numerical Analysis and Simulation(EB) E = E =E = F = F =F =
24
Slide 25
Numerical Analysis and Simulation GPRS_TS = 3 Type 1: class 1
(1+1) Type 2: class 2 (2+1) L 1 = L 2 = 20kbits, 1 rb = 2 rb = 0.05
call/s 1 : 2 = 1 : 1 h : n = 3 : 7 Normalized traffic load = 0.1
1.5 g = 1 25
Slide 26
Numerical Analysis and Simulation 26
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Numerical Analysis and Simulation 27
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Numerical Analysis and Simulation 28
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Numerical Analysis and Simulation 29
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Numerical Analysis and Simulation 30
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Numerical Analysis and Simulation 31
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Numerical Analysis and Simulation 32
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Numerical Analysis and Simulation 33
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Numerical Analysis and Simulation 34
Slide 35
Remain Work External blocking 1 2 h n L 1 L 2 Poisson arrival
Uniform, Pareto 35
Slide 36
Reference 2004 Kai-Wei Ke, Chen-Nien Tsai, and Ho-Ting Wu,
Performance analysis for hierarchical resource allocation in
multiplexed mobile packet data networks, Computer Networks, Vol.
54, Issue 10, 2010, pp. 1707-1725. Agilent Understanding General
Packet Radio Service (GPRS)
http://cp.literature.agilent.com/litweb/pdf/5988-2598EN.pdf S.
Emmanuel, S. Patrick, P. Pierre-Jean, GPRS for Mobile Internet,
Artech House, 2003. Wei-Yeh Chen, Jean-Lien C. Wu, and Hung-Huan
Liu, Performance Analysis of Radio Resource Allocation in GSM/GPRS
Networks, IEEE VTC 2002-Fall, vol. 3, pp. 1461-1465, 2002. 36