Research Article

Scheduling for Improving System Capacity in Multiservice 3GPP LTE

Table 1

Main simulation parameters considered in this work. The parameters are classified in general parameters of LTE, propagation, deployment, and service-specific ones.

Parameter Value Unit

General

Bandwidth 3 MHz
Carrier frequency 2 GHz
Number of RUs 15
Total cell power 20 W
Transport network packet delay (including Internet and Core Network (CN)) 14 ms
PDCCH capacity (number of scheduling grants per TTI) 5 (static modeling)
Number of HARQ processes 8
Maximum number of HARQ retransmissions 10
VoIP/Web user satisfaction ratio thresholds 95/90 %

Propagation

Path gain at 1 meter distance −29.03 dB
Path gain per dB distance −3.52 dB
Shadowing standard deviation 8 dB
Antenna type SCM 3GPP [38]

Deployment

Number of eNB/cells per eNB 3/3
Number of antennas in the UEs/cell 2/1
Cell radius 500 m
Frequency reuse full
UE speed 3 km/h

Voip Flows

RLC service data unit SDU discard period 80 ms
Mean talk period time 5 s
Voice activity factor 0.5
Frame size 264 bits
Frame period 20 ms
Maximum end-to-end VoIP frame delay 140 ms
SID frame size 39 bits
Required FER 1 %

Web Flows

Web page size (fixed) 10,000 bytes
Mean reading time 1.5 s
Average data rate requirement 128 kbps