QoS provisioning by power control for video communication via satellite links

Ma, Ting; Lee, Yee Hui

doi:10.1002/sat.1087

Cited by 8 publications

(5 citation statements)

References 25 publications

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“…The channel access method of observed satellite systems is the sat-ground CDMA (satellite to ground Code Division Multi Access) [8]. The signal from an uplink has a permanent frame structure, which includes pilots, media access control payloads and data payloads, as Figure 3 shows.…”

Section: M-walsh Pilots In a Signal Framementioning

confidence: 99%

A frequency-offset estimation algorithm combines code and time features for the remote reception of a weak satellite signal

Liu

Deng

2017

Automatika

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Remote control technology has greatly expanded the intelligence and automation of industry. Satellite signals are important to keep in contact with the facilities and devices in remote areas. However, satellite channels suffer from multi-scale attenuation to achieve reliable communications, which cannot provide sufficient accuracy and suitable complexity for the frequency-offset estimation of a weak signal. Therefore, this paper focused on a frequency-offset estimation method for a weak signal from a distant, poor satellite channel. First, we built a model of a distant satellite channel with mirror power reflection, considering large fading and multi-path fading simultaneously. Second, we described M-Walsh pilots and a signal vector matrix as they relate to satellite signals. Initially, we analysed the performance of different frequency-offset estimation methods in the satellite environment as opposed to the ground environment. We proposed compact M-Walsh pilots locking correlation to improve the estimation accuracy, which enhanced the frequency tracking. We further proposed equivalent weighting estimation allocation to help improve the balance of accuracy and complexity in the algorithm. Simulations and tests demonstrated that the new algorithm enhanced the root-mean-square-error frequency-offset estimate by 36.2% and the bit-to-error rate) performance by 29.5%.

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Section: M-walsh Pilots In a Signal Framementioning

confidence: 99%

A frequency-offset estimation algorithm combines code and time features for the remote reception of a weak satellite signal

Liu

Deng

2017

Automatika

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“…In this project, the measured two-way loss rate is referred to as IP packet loss rate. For satellite transmissions, a video codec (a device or program that compresses data to enable faster transmission and decompresses received data) with high compression efficiency is required [15].…”

Section: Y = αUmentioning

confidence: 99%

“…Rain attenuates this frequency band by scattering and absorption of electromagnetic waves by drops of liquid water. This is more severe in the tropical region where heavy convective rain dominates [4]. In case of Huye campus located at a longitude and latitude of 29.7˚ and 2.6˚ respectively, rain intensity varies accordingly and this may affect the transmission.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Effects of Rainfall Intensity into the Performance of Video Conferencing

Duhujamahoro¹,

Twizere²,

Mazimpaka³

et al. 2016

WJET

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Attenuation due to rain is an important limitation in the designing of the microwave communication links operating at frequencies above 10 GHz. Video conferencing performs over high-speed link via high-speed satellite (WINDS satellite) transmission in the Ka-band which is vulnerable to attenuation due to rain. Using the ITU-R proposed models for the prediction of rain attenuation gives a good estimation for the microwave propagation loss caused by rain for the temperate regions, but it underestimates the rain attenuation prediction for the monthly variation of rain rate by averaging annual rain rate for particular region. This study was carried out at the University of Rwanda/Huye Campus. The rain rates were predicted for 0.01 percentage of time from rainfall data measured during two months of July and August using the RD-80 Joss and Waldvogel Disdrometer. From the data collected and analyzed, compared with ITU-R model, we can see that where Rwanda region is situated in region K, what is different from the obtained results because the data are collected during months that coincide with a dry season.

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“…In the satellite network to support the QoS, inherent characteristics such as a long propagation delay and use of a higher frequency should be addressed. Substantial research has focused on the needed technologies to provide Internet services satisfying users in the satellite network [10][11][12][13][14][15][16][17][18][19][20][21][22]. In [11], a resource allocation scheme including a packing algorithm was proposed to provide QoS connections over multi-frequency time division multiple access (MF-TDMA) satellite systems.…”

Section: Introductionmentioning

confidence: 99%

“…The authors of [13] suggested a code design for the mobile digital video broadcasting-return channel via satellite (DVB-RCS) and evaluated the code design in terms of QoS performance. In [14], the power control for video communication via satellite links was addressed for considering QoS in the environment of rain attenuation. The authors of [15] considered the gateway handover and network coding for the impaired gateway in the smart gateway diversity of satellite networks for the QoS support.…”

Section: Introductionmentioning

confidence: 99%

Overall Design of Satellite Networks for Internet Services with QoS Support

Lee

Park

2019

Electronics

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The satellite network is useful in various applications because of its coverage, broadcast capability, costs independent of the distance, and easy deployment. Recently, thanks to the advanced technologies in the satellite communication, the high throughput satellite system with mesh connections has been applied to the Internet backbone. In this paper, we propose a practical overall design of the satellite network to provide Internet services with quality of service (QoS) support via the satellite network. In the proposed design, we consider two service types such as delay-tolerance and delay-sensitive services allowing the long propagation delay of the satellite link. Since it is crucial to evaluate the user satisfaction in the application layer for various environments to provide the QoS support, we also define the performance metrics for the user satisfaction and derive the major factors to be considered in the QoS policy. The results of the performance evaluation show that there are factors such as the traffic load and burstiness in the QoS policy for the delay-tolerance service with volume-based dynamic capacity in the satellite network. For the delay-sensitive service with rate-based dynamic capacity, it is additionally indicated that it is important for the estimation of effective data transmission rate to guarantee the QoS. Furthermore, it is shown that the small data size has an effect on the slight reduction of the QoS performance in the satellite network.

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QoS provisioning by power control for video communication via satellite links

Cited by 8 publications

References 25 publications

A frequency-offset estimation algorithm combines code and time features for the remote reception of a weak satellite signal

A frequency-offset estimation algorithm combines code and time features for the remote reception of a weak satellite signal

Analysis of the Effects of Rainfall Intensity into the Performance of Video Conferencing

Overall Design of Satellite Networks for Internet Services with QoS Support

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