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Although the medium access control (MAC) signaling has been well-defined in the 3rd generation partnership project (3GPP) long term evolution (LTE) specifications, the scheduling algorithm crucial to guarantee QoS performance, still remains as open issues. In this article, a traffic-based queue-aware scheduling (TQS) algorithm is proposed for evolved nodeB's (eNB's) MAC scheduler in 3GPP LTE broadband...
Due to the constraint of single carrier frequency division multiple access (SC-FDMA) adopted in long term evolution (LTE) uplink, subcarriers allocated to single user equipment (UE) must be contiguous. This contiguous allocation constraint limits resource allocation flexibility and makes the resource scheduling problem more complex. Most of the existing work cannot well meet UE's quality of service...
Classroom scheduling problem has long been proven to be a NP-Complete problem. This paper presents a novel services-oriented scheduling approach. Regarding each type of resource as a service, Smart Class originally introduces SOA into this problem to efficiently facilitate educational programmers with the design space exploration (DSE) and greedy algorithms based approach. Furthermore, the Smart Class...
Performance optimization and energy efficiency are the major challenges in multi-core system design. Of the state-of-the-art approaches, cache affinity aware scheduling and techniques based on dynamic voltage frequency scaling (DVFS) are widely applied to improve performance and save energy consumptions respectively. In modern operating systems, schedulers exploit high cache affinity by allocating...
In OFDM-based System such as long term evolution (LTE), the scheduling scheme plays an essential role in not only improving the capacity of system, but also guarantee the fairness among the user equipments (UEs). However, most existing work about scheduling only considers the current throughput in physical layer. Thus in this paper, a cross-layer scheduling with fairness based on restless bandit (CSFRB)...
On a Chip Multi-Processor (CMP) architecture, cache sharing impacts threads non-uniformly, where some threads may be slowed down significantly, while others are not. This may cause severe performance problems such as throughput decreasing, cache thrashing. This paper proposes a new predicting inter-thread cache contention model, FOM (Frequency of Miss), and schedules threads based on the results of...
On a CMP (Chip Multi-Processor) architecture, cache sharing impacts threads non-uniformly, where some threads may be slowed down significantly, while others are not. This may cause severe performance problems such as throughput decreasing, cache thrashing. This paper proposes an architectural support predicting method (ASPM) to predict inter-thread cache contention, and schedules threads based on...
In grid environments, advance reservation mechanism is to provide reliable resource co-allocation and scheduling for applications. However, excessive advance reservation will bring about many negative effects for system's performance, such as lower resource utilization and higher rejection rate. To mitigate these negative effects of advance reservation, a relaxed reservation strategy is proposed,...
In the practical production process of a flexible manufacturing system (FMS), unexpected disturbances such as rush orders arrival and machine breakdown may inevitably render the existing schedule infeasible. This makes dynamic rescheduling necessary to respond to the disturbances and to improve the efficiency of the disturbed FMS. Compared with the static scheduling, the dynamic rescheduling relies...
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