Accepted from open call - Supporting real-time ip multimedia services in UMTS

Wong, Kai-Kit; Varma, V.K.

doi:10.1109/mcom.2003.1244935

Cited by 30 publications

(16 citation statements)

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“…Here, the concept of LFGCP is extended to the integrated voide/data system, and the interaction between the high-priority voice and the available-rate data is taken into account by the mathematical model for accurate performance analysis. 2 Let and denote the LFGCPs for voice and data calls, respectively. The overall policy can be described as follows: where and are the current numbers of admitted voice and data calls, respectively, in the cell:…”

Section: Lfgcp With Prioritymentioning

confidence: 99%

See 1 more Smart Citation

Optimal Resource Allocation and Adaptive Call Admission Control for Voice/Data Integrated Cellular Networks

Leong¹,

Zhuang

Cheng

et al. 2006

IEEE Trans. Veh. Technol.

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Abstract-Resource allocation and call admission control (CAC) are key management functions in future cellular networks, in order to provide multimedia applications to mobiles users with quality of service (QoS) guarantees and efficient resource utilization. In this paper, we propose and analyze a priority based resource sharing scheme for voice/data integrated cellular networks. The unique features of the proposed scheme are that 1) the maximum resource utilization can be achieved, since all the leftover capacity after serving the high priority voice traffic can be utilized by the data traffic; 2) a Markovian model for the proposed scheme is established, which takes account of the complex interaction of voice and data traffic sharing the total resources; 3) optimal CAC parameters for both voice and data calls are determined, from the perspective of minimizing resource requirement and maximizing new call admission rate, respectively; 4) load adaption and bandwidth allocation adjustment policies are proposed for adaptive CAC to cope with traffic load variations in a wireless mobile environment. Numerical results demonstrate that the proposed CAC scheme is able to simultaneously provide satisfactory QoS to both voice and data users and maintain a relatively high resource utilization in a dynamic traffic load environment. The recent measurement-based modeling shows that the Internet data file size follows a lognormal distribution, instead of the exponential distribution used in our analysis. We use computer simulations to demonstrate that the impact of the lognormal distribution can be compensated for by conservatively applying the Markovian analysis results.Index Terms-Call admission control (CAC), quality-of-service (QoS), resource allocation, voice and data services.

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Section: Lfgcp With Prioritymentioning

confidence: 99%

“…Successful support of multimedia applications requires quality-of-service (QoS) guarantees over wireless links [1], [2]. Due to limited radio resources, efficient resource allocation is extremely important for wireless networks in order to meet the rapidly increasing demands of mobile subscribers as well as to guarantee QoS [3]- [6].…”

mentioning

confidence: 99%

Optimal Resource Allocation and Adaptive Call Admission Control for Voice/Data Integrated Cellular Networks

Leong¹,

Zhuang

Cheng

et al. 2006

IEEE Trans. Veh. Technol.

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“…Finally, we consider SIP to be a generic application-level signaling protocol that will eventually become ubiquitously available. SIP has for instance been adopted as the signaling protocol for UMTS multimedia sessions [49].…”

Section: Sip and Sdpmentioning

confidence: 99%

Delivering Live Multimedia Streams to Mobile Hosts in a Wireless Internet with Multiple Content Aggregators

et al. 2005

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Abstract.We consider the distribution of channels of live multimedia content (e.g., radio or TV broadcasts) via multiple content aggregators. In our work, an aggregator receives channels from content sources and redistributes them to a potentially large number of mobile hosts. Each aggregator can offer a channel in various configurations to cater for different wireless links, mobile hosts, and user preferences. As a result, a mobile host can generally choose from different configurations of the same channel offered by multiple alternative aggregators, which may be available through different interfaces (e.g., in a hotspot). A mobile host may need to handoff to another aggregator once it receives a channel. To prevent service disruption, a mobile host may for instance need to handoff to another aggregator when it leaves the subnets that make up its current aggregator's service area (e.g., a hotspot or a cellular network). In this paper, we present the design of a system that enables (multi-homed) mobile hosts to seamlessly handoff from one aggregator to another so that they can continue to receive a channel wherever they go. We concentrate on handoffs between aggregators as a result of a mobile host crossing a subnet boundary. As part of the system, we discuss a lightweight application-level protocol that enables mobile hosts to select the aggregator that provides the 'best' configuration of a channel. The protocol comes into play when a mobile host begins to receive a channel and when it crosses a subnet boundary while receiving the channel. We show how our protocol can be implemented using the standard IETF session control and description protocols SIP and SDP. The implementation combines SIP and SDP's offer-answer model in a novel way.

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“…An example of session setup between two UEs is shown in Figure 11 [18]. The caller UE sends a SIP invite message to its P-CSCF, including an SDP description of the media components of the session and the SIP identity of the called UE.…”

Section: B Session Setup and Controlmentioning

confidence: 99%