Comprehensive Polling and Scheduling Mechanism for Long Reach Gigabit Passive Optical Network

2019 ◽  
Vol 40 (1) ◽  
pp. 55-66 ◽  
Author(s):  
Rizwan A. Butt ◽  
Sevia M. Idrus ◽  
Shahid-Ur Rehman ◽  
Pir Meher Ali Shah ◽  
Nadiatulhuda Zulkifli
Keyword(s):  
Optical Network ◽  
Idle Time ◽  
Passive Optical Network ◽  
Bandwidth Utilization ◽  
Traffic Class ◽  
Optical Line ◽  
Dynamic Bandwidth Assignment ◽  
Type 3 ◽  
Dynamic Bandwidth

Abstract Dynamic bandwidth assignment (DBA) schemes for long reach PONs face a suffer from higher upstream channel idle time due to long round trip time (RTT). In ITU PONs, the DBA schemes; Immediate allocation with colorless grant (IACG), Efficient bandwidth utilization (EBU) and GPON redundancy eraser algorithm (GREAL) minimize idle time by sending bandwidth grants to the optical network units (ONUs) every downstream frame (DF). EBU further improves IACG by utilizing unused bandwidth (UBW) of other traffic classes. Sending the grant results every DF requires optical line terminal (OLT) to remember all previous grants sent to ONU during RTT and subtract them from the received queue reports. Since, both IACG and EBU assign the excess bandwidth equally to ONUs. Therefore, the OLT is actually not aware of the complete grant to each traffic class and thus do not subtract these completely from receiving reports. This leads to wastage of bandwidth and higher US delays due to over granting. GREAL resolves this problem by not utilizing the excess bandwidth which also leads to increased US delays. The proposed scheme in this study eliminates this shortcoming by allocating excess bandwidth to each traffic class completely at the OLT. Moreover, the UBW assignment mechanism of EBU is also improved. Simulation results show a 50–85 % reduction in delays of type-2 (T2) and type-3 (T3) traffic classes versus GREAL and IACG and up to 40 % reduction in delays for type-4 (T4) versus EBU.

A Survey of Dynamic Bandwidth Assignment Schemes for TDM-Based Passive Optical Network

2020 ◽  
Vol 41 (3) ◽  
pp. 279-293 ◽  
Author(s):  
Rizwan Aslam Butt ◽  
M. Waqar Ashraf ◽  
M Faheem ◽  
Sevia M Idrus
Keyword(s):  
Multiple Access ◽  
Optical Network ◽  
Utilization Efficiency ◽  
Passive Optical Network ◽  
Bandwidth Utilization ◽  
Available Bandwidth ◽  
Dynamic Bandwidth Assignment ◽  
Time Division ◽  
Dynamic Bandwidth ◽  
The Impact

AbstractIn time division, multiple access (TDMA)-based passive optical network (PONs), a dynamic bandwidth assignment (DBA) is necessary for efficient utilization of the available bandwidth of the upstream link. An efficient DBA scheme can improve the upstream performance of a traffic class of an ONU in two ways. First, it can increase the bandwidth assignment to it by efficiently utilizing the available bandwidth. Secondly, it can reduce the channel and frame idle time by increasing the polling frequency and by assigning extra surplus bandwidth not used by the other ONUs. Many DBA schemes have been reported for both ITU PONs (GPON and XGPON) and IEEE PONs (EPON and 10 G EPON). In this study, we explain the impact of DBA scheme on the upstream performance of PON and then do a thorough survey of both PON standards, categorize the DBA schemes and review them critically. Based on the literature review we also give our opinion on the most suitable DBA scheme for both type PONs on the basis of upstream delays, frame loss and bandwidth utilization efficiency.

scholarly journals Performance evaluation of comprehensive bandwidth utilization for 10-gigabit passive optical network

2019 ◽  
Vol 8 (3) ◽  
pp. 1053-1058
Author(s):  
N. A. Ismail ◽  
Sevia Mahdaliza Idrus ◽  
R. A. Butt ◽  
F. Iqbal ◽  
A. M. Zin ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Real Time ◽  
Bandwidth Allocation ◽  
Optical Network ◽  
Passive Optical Network ◽  
Bandwidth Utilization ◽  
Traffic Class ◽  
Real Time Traffic ◽  
Traffic Generator ◽  
And Performance

Bandwidth allocation during upstream transmission is crucial to determine the efficiency and performance of a XG-PON. For XG-PON, bandwidth assignment is done based on T-CONT which represents a traffic class as per ITU recommendation. DBA scheme used in this paper is based on CBU to assign bandwidth to ONUs based on the T-CONT supporting QoS as per SLA. In this paper, CATV traffic is used as traffic generator which used for generation of Ethernet frames and results showed expected trend of mean upstream delay for traffic class T2, T3 and T4 as compared to recommended value which is below 1.5ms. These results prove that CBU can also be implemented on real time traffic.

Sleep assistive dynamic bandwidth assignment scheme for passive optical network (PON)

2018 ◽  
Vol 36 (3) ◽  
pp. 289-300
Author(s):  
Rizwan Aslam Butt ◽  
M. Faheem ◽  
M. Waqar Ashraf ◽  
Sevia M. Idrus
Keyword(s):  
Optical Network ◽  
Passive Optical Network ◽  
Dynamic Bandwidth Assignment ◽  
Dynamic Bandwidth ◽  
Assignment Scheme

Dynamic Bandwidth Allocation with Effective Utilization of Polling Interval over WDM/TDM PON

2014 ◽  
Vol 35 (4) ◽  
Author(s):  
Cuiping Ni ◽  
Chaoqin Gan ◽  
Ziyue Gao
Keyword(s):  
Wavelength Division Multiplexing ◽  
Bandwidth Allocation ◽  
Optical Network ◽  
Packet Delay ◽  
Passive Optical Network ◽  
Dynamic Bandwidth Allocation ◽  
Bandwidth Utilization ◽  
Effective Utilization ◽  
Dynamic Bandwidth ◽  
Polling Interval

AbstractWDM/TDM (wavelength-division multiplexing/time-division multiplexing) PON (passive optical network) appears to be an attractive solution for the next generation optical access networks. Dynamic bandwidth allocation (DBA) plays a crucial role in efficiently and fairly allocating the bandwidth among all users in WDM/TDM PON. In this paper, two dynamic bandwidth allocation schemes (DBA1 and DBA2) are proposed to eliminate the idle time of polling cycles (i.e. polling interval), improve bandwidth utilization and make full use of bandwidth resources. The two DBA schemes adjust the time slot of sending request information and make fair scheduling among users to achieve the effective utilization of polling interval in WDM/TDM PON. The simulation and theoretical analyses verify that the proposed schemes outperform the conventional DBA scheme. We also make comparisons between the two schemes in terms of bandwidth utilization and average packet delay to further demonstrate the effectiveness of the scheme of DBA2.

Study on P2P Service Bearer Method for Passive Optical Network for Long Distance and Wide Access

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Yan Wang ◽  
Shangya Han ◽  
Panke Qin ◽  
Yaping Li ◽  
Yanmei Shen
Keyword(s):  
Simulation Analysis ◽  
Optical Network ◽  
Passive Optical Network ◽  
Data Traffic ◽  
Core Network ◽  
Long Distance ◽  
Optical Line Terminal ◽  
Optical Line ◽  
Wide Access ◽  
P2p Service

AbstractFor the effective bearer of P2P-type services, a P2P service bearer reorientation method for passive optical network for long-distance wide access based on P2P protocol message and wire-speed message identification is proposed. However, the reorientation method still has the possibility of relocation failure, so it is modified – that is, an improved P2P service bearer reorientation method based on optical line terminal (OLT) and optical network unit (ONU) cooperation. And the tool NS2 is used for network simulation analysis. Through simulation analysis, it is verified that the modified reorientation method improves the data traffic burden at the core network and at the OLT.

scholarly journals Implementation of a One-LLID-per-Queue DBA Algorithm in EPON

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
N. A. M. Radzi ◽  
N. M. Din ◽  
M. H. Al-Mansoori ◽  
H. Zainol Abidin
Keyword(s):  
Traffic Flow ◽  
Bandwidth Allocation ◽  
Optical Network ◽  
Access Network ◽  
Passive Optical Network ◽  
Dynamic Bandwidth Allocation ◽  
Global Priority ◽  
Upstream Direction ◽  
Ethernet Passive Optical Network ◽  
Dynamic Bandwidth

The advantages of Ethernet passive optical network (EPON) are setting it to be a natural ubiquitous solution for the access network. In the upstream direction of EPON, the directional property of the splitter requires that the traffic flow be mitigated to avoid collision. A dynamic bandwidth allocation (DBA) scheme is desirable in optimizing the bandwidth usage further. In this paper, a global priority DBA mechanism is discussed. The mechanism aims to reduce the overall delay while enhancing the throughput and fairness. This study was conducted using MATLAB where it was compared to two other algorithms in the literature. The results show that the delay is reduced up to 59% and the throughput and fairness index are improved up to 10% and 6%, respectively.

Sign in / Sign up

Export Citation Format

Share Document