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This work proposes a novel priority based resource management framework for multimedia applications in distributed collaborative environment. Due to the dynamic nature of the collaborative environment, sometimes the network could be lightly loaded and sometimes highly congested. Moreover, application priority might be changed by the user dynamically. In this dynamic environment, Quality of Experience...
A new dynamic bandwidth allocation algorithm for the upstream channel of EPONs is proposed. In contrast to the existing competitive approaches, a standard prediction mechanism along with a judicious mix of QoS awareness and fairness in resource allocation is adopted in our approach. Via simulations we show that the proposed scheme offers an increase in overall system throughput while maintaining the...
The paper presents several factors that must be taken into account when designing an uplink scheduling algorithm. Many scheduling methods have been developed, but none of them was standardized yet and the implementation remains vendor specific. Using QualNet, the Strict Priority algorithm was simulated using two different network topologies. The way the uplink resources are allocated is analyzed for...
It was reported that the distribution of multimedia traffic flows among different radio access networks can enable better network utilization than the transmission via single network. Aggregated radio resource management is a process that can efficiently manage the allocation and deallocation of radio resources among different radio access technologies so that mobile users are allowed to enjoy seamless...
Multi-nexthop routing mechanisms is the key point in network congestion, and the essential question is how to forward packets among multi-nexthop to reach equiponderant forwarding. This paper proposes an equiponderant forwarding strategy in multi-nexthop routing, which forwards the packets according to the actual capability of each node, and resolves the equiponderant forwarding problem of multi-nexthop...
In grid computing, most of the SLA management systems focus on static SLAs, where the guarantee terms are defined as constants or bounds. None of them support dynamic SLAs based on analytical expressions. Therefore, to enforce dynamic SLAs and to improve services offered to applications, we propose a new monitoring method to control the resource utilization and to reconfigure them when necessary in...
Multicast communication is an efficient method of data transmission and distribution among a group, especially when network resources are inadequate and needs to be shared. Fair share of network resources, such as, bandwidth, is desirable in such cases. Although there has been an intensive research effort to design protocols and construct multicast routing graphs for a single multicast group, construction...
In current multi-channel live P2P video systems, there are several fundamental performance problems including exceedingly-large channel switching delays, long playback lags, and poor performance for less popular channels. These performance problems primarily stem from two intrinsic characteristics of multi-channel P2P video systems: channel churn and channel- resource imbalance. In this paper, we...
This paper presents a bandwidth occupied time proportion fair MAC algorithm (BOTP-FMAC) for WLAN and wireless mesh network (WMN). It aims to address the unfairness problem in enhanced distributed channel access (EDCA) mechanism, in which higher-priority streaming traffic flows intend to severely deprive the access opportunity of lower-priority traffic flows due to the capture effect, especially when...
To find a way to access a path to provide quality of service (QoS) requirements, we can use the constraint-based routing technique. Until now algorithms uses an additive constraint along with a bandwidth constraint (e.g. delay or hop count) have been used. It was for the requirement of QoS. Selecting the path is used not only for the guaranty QoS, but also for the bandwidth and delay constraints....
This paper proposes a novel radio resource management scheme in the link adaptive WiMAX network and the hierarchical priority-queuing with weighted round-robin (HPWRR) scheduling algorithm for different traffic services. The radio resource management scheme can re-assign the burst profile and dynamically adjust the allocated bandwidth to the SSs to improve the resource utilization. Then, the HPWRR...
This paper studies the problem of adaptive resource allocation for downlink transmission at the base station (BS) of future multi-service IP-based networks. A delay margin based scheduling (DMS) approach is proposed to determine the queuing priority of an incoming packet by taking into consideration the distance between its currently experienced delay and its maximum allowed limit since such an instantaneous...
In wireless networks, providing a fair bandwidth allocation without too much reducing the system throughput is very challenging. Path loss attenuations induce unequal spectral efficiencies and in terms unequal throughtput for mobiles with different geographical positions. In the litterature, Proportional Fair (PF) is acknowledged as the reference scheduler in multiuser OFDM wireless networks. Opportunistically...
In mesh networks, various types of routing matrix are applicable. This document proposes a routing methodology, which makes use of the ETR (Expected Transmission Rate). The ETR is based on a load balancing metric contingent on the linked bandwidth of each integrated node. This routing methodology can be applied when selecting a relay node based on the present link efficiency between the available...
We propose service parameters, architectures to provide them, pricing policies and a heuristic route-reservation algorithm for a network providing bandwidth reservation services. Bandwidth reservation services allow users to choose or assign service parameters with which users' requirements are satisfied. We classify the parameters by bandwidth reservation contents (ex. video conference, streaming)...
It is very important to allocate and manage resources for multimedia traffic flows with real-time performance requirements in order to guarantee quality of service (QoS). In this paper, we develop a scalable architecture and an algorithm for admission control of real-time flows. Since individual management of each traffic flow on each transit router can cause a fundamental scalability problem in both...
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