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| 2. |
- Chen, Biao, et al.
(författare)
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Efficient and fine scheduling algorithm for bandwidth allocation in Ethernet passive optical networks
- 2006
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Ingår i: IEEE Journal of Selected Topics in Quantum Electronics. - 1077-260X .- 1558-4542. ; 12:4, s. 653-660
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Tidskriftsartikel (refereegranskat)abstract
- A novel fine scheduling algorithm is introduced for upstream bandwidth allocation in an Ethernet-based passive optical network. This scheduling algorithm consists of an inter optical network unit (ONU) scheduler at the optical line terminal (OLT) and an intra-ONU scheduler at each ONU. In the inter-ONU scheduling, a novel GATE/REPORT approach is introduced to eliminate the unused remainders without transmission delay and maximize the utilization of bandwidth. Our novel intra-ONU scheduler gives fair bandwidth allocation to the queues of different priorities for each user in a hierarchical and decentralized way. Numerical results have shown that our overall scheduling algorithm can fulfill various requirements of delay and throughput for the transmission of multimedia traffic for each end user..
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| 3. |
- Chen, Jiajia, et al.
(författare)
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A novel algorithm for intra-ONU bandwidth allocation in ethernet passive optical networks
- 2005
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Ingår i: IEEE Communications Letters. - 1089-7798 .- 1558-2558. ; 9:9, s. 850-852
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Tidskriftsartikel (refereegranskat)abstract
- A novel decentralized algorithm is introduced for the intra-ONU bandwidth allocation in an Ethernet Passive Optical Network (EPON). The algorithm is of low computational complexity, and can guarantee both the priority and fairness of the differentiated services. Simulation results are presented and compared with those of two existing bandwidth allocation algorithms.
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| 4. |
- Chen, Jiajia, et al.
(författare)
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A novel hierarchical algorithm for intra-ONU scheduling in an ethernet passive optical network
- 2005
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Ingår i: Network Architectures, Management, and Applications III. - : SPIE. ; , s. W220-W220
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Konferensbidrag (refereegranskat)abstract
- The quality of service (QoS) requirements of end users and services are totally different, and thus the multi-oriented (user-oriented and service-oriented) scheduling for access networks based on a remote scheduling system especially for EPONs is desired to replace the single-oriented (user-oriented or service-oriented) scheduling. In this paper we introduce a novel hierarchical algorithm of intra-ONU scheduling for multi-oriented QoS, which can guarantee both the priority of the differentiated services and the fairness of the different users. Numerical results have shown that our overall scheduling algorithm can fulfill various requirements of delay and throughput for the transmission of multimedia traffic for each end user.
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| 5. |
- Chen, Jiajia, et al.
(författare)
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Joint Bandwidth Scheduling to Support Differentiated Services and Multiple Service Providers in 1G and 10G EPONs
- 2009
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Ingår i: Journal of Optical Communications and Networking. - : The Optical Society. - 1943-0620 .- 1943-0639. ; 1:4, s. 343-351
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Tidskriftsartikel (refereegranskat)abstract
- Dynamic bandwidth allocation (DBA) is one of the key issues for the current (1G) and next-generation (10G) Ethernet-based passive optical network (EPON) systems. We present a novel bandwidth scheduling scheme that integrates specific scheduling implementations in the optical line terminal and optical network units. This scheduling enables multiservice access with scalable quality of service support for the triple-play (video, voice, and data) services and open access. Our simulation results show that the proposed scheduling algorithm performs very well in supporting service differentiation and fair allocation of bandwidth to different service providers. A performance comparison between 1G and 10G systems is also presented. To the best of our knowledge, no detailed study of DBA in a 10G EPON can be found in the literature so far.
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| 6. |
- Chen, Jiajia, et al.
(författare)
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Self-protection scheme against failures of distributed fiber links in an Ethernet passive optical network
- 2006
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Ingår i: Journal of Optical Networking. - 1536-5379. ; 5:9, s. 662-666
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Tidskriftsartikel (refereegranskat)abstract
- A novel self-protection scheme for an Ethernet passive optical network is introduced and studied at both the physical and the media access control layers. The scheme is simple and fast and can provide 1: 1 protection and automatic traffic restoration against the fiber link failure between a remote node ( RN) and any optical network unit (ONU). Simulation results show that fiber failure does not degrade the transmission performance, and the restoration time depends mainly on the switch time of the physical layer. Our protection scheme saves many long fibers, does not influence other normal ONUs, and requires no active device in the RN.
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| 7. |
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| 8. |
- Skubic, Björn, et al.
(författare)
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Improved scheme for estimating T-CONT bandwidth demand in status reporting DBA for NG-PON
- 2009
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Ingår i: Network Architectures, Management, and Applications VII. - : SPIE - International Society for Optical Engineering. - 9780819480354 ; , s. 76330E-
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Konferensbidrag (refereegranskat)abstract
- A scheme for estimating T-CONT bandwidth demand within dynamic bandwidth allocation (DBA) for next-generation passive optical network (NG-PON) is proposed and evaluated. Estimating T-CONT bandwidth demand is considered as a main challenge in gigabit-capable passive optical network (GPON) DBA. The proposed minimum guaranteed T-CONT content (MGTC) scheme allows for a more conservative estimate of bandwidth demand. It is shown that at high load significant improvements in delay, jitter and bandwidth utilization can be achieved with the proposed scheme. For light loads the conventional scheme shows better delay performance. However, this may be overcome by controlled overgranting in the MGTC scheme.
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| 9. |
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| 10. |
- Jiang, Biao, et al.
(författare)
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Performance analysis of port-starboard discrimination for towed twin-line array
- 2008
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Ingår i: 16th European Signal Processing Conference. - Piscataway, NJ : IEEE Communications Society.
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Bokkapitel (refereegranskat)abstract
- The performance of port-starboard discrimination (PSD) for a target detected by a towed twin-line sonar array is presented. The PSD performance is evaluated by a measure referred to as the port-starboard rejection ratio (PSRR), which is defined as the ratio of the output power in the desired signal direction to that in the mirror direction. Analytical expression for the PSRR is derived, in terms of the array separation, signal-to-noise-ratio (SNR), interference-to-noise-ratio (INR), signal-to-interference-ratio (SIR), angular separation and correlation between the desired signal and the interference, array size and finite sample size.
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