Robust header compression for real-time services in cellular networks

Cellatoglu, A.; Fabri, S.N.; Sadka, A.H.; Kondoz, A.M.

doi:10.1049/cp:20010025

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…Robust checksum-based compression (ROCCO) [15] is a refinement of CRTP, which improves the header compression performance for highly error-prone links and long round trip times [16]. Similarly, Enhanced Compressed RTP (ECRTP) [17] is a refinement of CRTP.…”

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

“…The only study in this direction that we are aware of is [16]. In [16] the objective speech quality degradation is studied (using the traditional SNR which has only a weak correlation with user perception) for ROCCO and CRTP. In contrast, in this paper we consider the state-of-the-art ROHC compression scheme and evaluate the voice quality using a thorough evaluation methodology that was developed in [25].…”

Section: Related Workmentioning

confidence: 99%

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RObust Header Compression (ROHC) Performance for Multimedia Transmission over 3G/4G Wireless Networks

Fitzek

Rein²,

Seeling

et al. 2005

Wireless Pers Commun

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Abstract. RObust Header Compression (ROHC) has recently been proposed to reduce the large protocol header overhead when transmitting voice and other continuous media over IP based protocol stacks in wireless networks. In this paper we evaluate the real-time transmission of GSM encoded voice and H.26L encoded video with ROHC over a wireless link. For the voice transmission we examine the impact of ROHC on the consumed bandwidth, the voice quality, and the delay jitter in the voice signal. We find that for a wide range of error probabilities on the wireless link, ROHC roughly cuts the bandwidth required for the transmission of GSM encoded voice in half. In addition, ROHC improves the voice quality compared to transmissions without ROHC, especially for large bit error probabilities on the wireless link. The improvement reaches 0.26 on the 5-point Mean Opinion Score for a bit error probability of 10 −3 . For the video transmission we examine the impact of ROHC on the consumed bandwidth. We find that the bandwidth savings with ROHC depend on the quantization scale used for the video encoding and the video content and ranges between 5-40% for typical scenarios.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

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RObust Header Compression (ROHC) Performance for Multimedia Transmission over 3G/4G Wireless Networks

Fitzek

Rein²,

Seeling

et al. 2005

Wireless Pers Commun

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“…The compressed headers carry changes to the context and the HC schemes must have mechanisms for repairing and detecting the context when it is out of date. Some examples of HC include Compressed RTP (CRTP) [13], Robust Checksum-Based Header Compression (ROCCO) [11,13] and Robust Header Compression (ROHC) [14].…”

Section: Header Compression (Hc)mentioning

confidence: 99%

Quality of service evaluation of VoIP over HSDPA

Sousa¹,

Carvalho²,

Rodrigues³

et al. 2006

2006 International Telecommunications Symposium

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In this paper we investigate the characteristics of the Voice over IP service deployed over 3G mobile network HSDPA. The necessary protocols for Voice over IP may provide controlled delivery of multimedia traffic over Internet and wireless technologies. We evaluate the VoIP service using a simulator that models the HSDPA system. Results are manifested in terms of packet loss rate, delay and delay jitter, which are important performance measures to guarantee QoS. Moreover, the VoIP performance depends on the system capacity and radio access channel configurations. The understanding of how the VoIP service behaves under different system configurations is given in terms of offered traffic load and wireless channel error probability.Index Terms-VoIP, HSDPA, Quality of Service, Performance Analysis. Public Switched Telephone Network (PSTN) from the user and network operator's viewpoint: substantial cost reduction, enhancement of voice communication with multimedia, and lower bandwidth consumption.On the other front, the current development in the cellular radio network technologies is paving the way towards IP capable radio networks. 3G WCDMA networks, e.g. 3GPP release 5 (HSDPA), will provide IP over wireless services, therefore also enabling VoIP. The provision of this emerging real-time service may be of special interest for the mobile network operators for multiple reasons. Firstly, as the bandwidth for individual flows in packet switched domain is not reserved in advance, the multiplexing effects should bring significant capacity savings. Secondly, VoIP service will be supported by the Session Initiation Protocol (SIP), which is a text-based protocol, similar to HTTP and SMTP, for initiating interactive communication sessions between users. Finally, the convergence towards packet switched and IP technology may convince mobile operators to go for solutions that are truly all-IP in order to simplify network interconnection and network management. A common, IP-based transport and service platform will offer mobile users a multitude of real-time and interactive services. IP as a service enabler implies IP all the way to the mobile terminal. The main advantage of running IP all the way over the air interface is service flexibility. That is, there are no dependencies between applications and the network and as a consequence, almost anyone can develop new applications [1,2].The authors are with the Wireless

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“…The only study in this direction that we are aware of is [11]. In [11] the objective speech quality degradation is studied (using the traditional SNR which has only a weak correlation with user perception)…”

Section: Case Study: Impact Of Rohc On Voice Qualitymentioning

confidence: 99%

Voice quality evaluation in wireless packet communication systems: a tutorial and performance results for RoHC

Rein

Fitzek

Reisslein

2005

IEEE Wireless Commun.

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As wireless systems are evolving towards supporting a wide array of services, including the traditional voice service, using packet-switched transport, it becomes increasingly important to assess the impact of packet-switched transport protocols on the voice quality. In this article, we present a tutorial on voice quality evaluation for wireless packet-switched systems. We introduce an evaluation methodology that combines elementary objective voice quality metrics with a frame synchronization mechanism. The methodology allows networking researchers to conduct effective and accurate quality evaluation of packet voice. To illustrate the use of the described evaluation methodology and the interpretation of the results, we conduct a case study of the impact of Robust Header Compression (ROHC) on the voice quality achieved with real-time transmission of GSM encoded voice over a wireless link.

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Robust header compression for real-time services in cellular networks

Cited by 7 publications

References 3 publications

RObust Header Compression (ROHC) Performance for Multimedia Transmission over 3G/4G Wireless Networks

RObust Header Compression (ROHC) Performance for Multimedia Transmission over 3G/4G Wireless Networks

Quality of service evaluation of VoIP over HSDPA

Voice quality evaluation in wireless packet communication systems: a tutorial and performance results for RoHC

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