Mobile WiMAX video quality and transmission efficiency

Sgardoni, Victoria; Halls, David; Bokhari, Syed Mohsin Matloob; Bull, David; Nix, Andrew R

doi:10.1109/pimrc.2011.6139662

Cited by 7 publications

(7 citation statements)

References 16 publications

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“…Video applications demand a low Packet Error Rate (PER), and this can be achieved via the use of MAC layer Automatic Repeat Request (ARQ) [3]. However, ARQ consumes additional bandwidth and also adds to the end-to-end latency.…”

Section: Problems and Motivationmentioning

confidence: 99%

HARQ Implementation for Efficient MAC to MAC Video Streaming over Mobile WiMAX

Shankar¹,

Raghavendra²,

Rao

2013

IJMIT

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IEEE 802.16e is the standard for Mobile WiMAX which was introduced by the IEEE committee to provide broadband access in rural and urban areas over fixed wireless channels. Mobile WiMAX is an enhanced version of IEEE 802.16 standard with mobility support. There are lots of challenges involved in the service provided by the Mobile WiMAX. Efficient data transfer between different layers of mobile WiMAX is one of the major research issues. In this work HARQ (Hybrid Automatic Repeat Request) technique is implemented in Qualnet environment for an efficient transmission of video streaming across PHY(Physical) and MAC(Medium Access Control) layer of mobile WiMAX (Worldwide Interoperability for Microwave Access). HARQ utilizes both FEC (Forward Error Correction) an d ARQ (Automatic Repeat Request) techniques to reduce the delay, jitter and to increase throughput efficiently under prescribed quality of service constraint. Different Scheduling schemes and cross layer approaches that support mobile WiMAX are analysed. mmSIR scheduler is used in this work since it allocates resources priority wise. Diffferent network quality parameters like end to end delay,average jitter,and average throughput have been analysed by using existing ARQ and implemented HARQ techniques.Both ARQ and HARQ techniques are compared for a video application.

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Section: Problems and Motivationmentioning

confidence: 99%

HARQ Implementation for Efficient MAC to MAC Video Streaming over Mobile WiMAX

Shankar¹,

Raghavendra²,

Rao

2013

IJMIT

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“…Unicast and multicast transmission of high resolution video is simulated over the mobile WiMAX system. This work is based on a MAC-PHY simulator developed according to the standard [1] and presented in [18]. The mobile WiMAX PHY layer simulator is described in [25].…”

Section: Wimax Mac-phy Simulatormentioning

confidence: 99%

“…Each UDP packet corresponds oneto-one to a MAC SDU. More details on the MAC-PHY simulator are given in [18].…”

Section: Simulator Functionalitymentioning

confidence: 99%

“…Our previous work in [18] focused on the BLER attained (rather than SER) when ARQ retransmissions occurred in the next DL subframe, without limitation on the maximum number of retransmissions (since the ARQ retransmission frequency is not specified in the 802.16e standard [1]). In [18], it was shown that the BLER achieved was below 10 −2 at a mean channel SNR of 8 dB, for a block lifetime of 100 ms, with MCS modes 16QAM 1/2 or lower. All MCS modes up to 64QAM 1/2 attained quasi error free transmission when the mean channel SNR was 12 dB and block lifetimes were greater than 70 ms.…”

Section: Analysis Of Bler and Udp Permentioning

confidence: 99%

“…The work identifies which MCS modes are suitable to deliver QoS for real-time video, by maintaining quasi-zero PER and low jitter at the application layer. Our previous work [18] focused on received video quality (based on PSNR), for a 7.63 Mbps HD video sequence, when no limitations were applied to the ARQ Retry Timeout parameter and the maximum number of ARQ retransmissions, as assumed in [8,9] (since the frequency of ACK is not specified in the IEEE 802.16e standard [1]). The effect of ARQ-aware scheduling was not investigated in our previous work.…”

Section: Introductionmentioning

confidence: 99%

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ARQ-Aware Scheduling and Link Adaptation for Video Transmission over Mobile Broadband Networks

Sgardoni

Bull

Nix

2012

Journal of Computer Networks and Communications

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This paper studies the effect of ARQ retransmissions on packet error rate, delay, and jitter at the application layer for a real-time video transmission at 1.03 Mbps over a mobile broadband network. The effect of time-correlated channel errors for various Mobile Station (MS) velocities is evaluated. In the context of mobile WiMAX, the role of the ARQ Retry Timeout parameter and the maximum number of ARQ retransmissions is taken into account. ARQ-aware and channel-aware scheduling is assumed in order to allocate adequate resources according to the level of packet error rate and the number of ARQ retransmissions required. A novel metric, namely,goodput per frame, is proposed as a measure of transmission efficiency. Results show that to attain quasi error free transmission and low jitter (for real-time video QoS), only QPSK 1/2 can be used at mean channel SNR values between 12 dB and 16 dB, while 16QAM 1/2 can be used below 20 dB at walking speeds. However, these modes are shown to result in low transmission efficiency, attaining, for example, a total goodput of 3 Mbps at an SNR of 14 dB, for a block lifetime of 90 ms. It is shown that ARQ retransmissions are more effective at higher MS speeds.

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