Research on Upstream Bandwidth Allocation Algorithm under the Convergence Network of EPON and WLAN

EPON和WLAN融合网络架构下的 上行链路调度算法研究

Upstream multiple access control mechanism along with relevant bandwidth allocation algorithm at MAC layer occupy a very important position in PON technologies and play a key role in deciding PON performance as well as realizing multi-service access support .

MAC层 上行链路的多址接入访问控制机制和 带宽分配算法在PON网络技术中占有重要地位，是决定PON性能以及实现多业务接入的关键。

A improved scheme based on upstream bandwidth for PON

PON 上行 带宽的改进 分配方案

Simulation results match theoretical analysis well . ( 4 ) This thesis provides two kinds of upstream bandwidth allocation algorithm for the convergence network of EPON and WLAN : centralized bandwidth allocation and distributed bandwidth allocation . The advantage and disadvantage of the two algorithms are elaborated in detail .

仿真实验显示的结果和理论分析相符合。（4）提出和设计了EPON和WLAN融合网络架构下两种 上行链路调度框架：集中式带宽分配和分布式带宽分配，对它们的优缺点做了详细分析。

A mathematic model of EPON upstream channel is analyzed based on the discussion of the existing bandwidth allocation technologies of EPON . And a scheme of dynamic bandwidth allocation based on fixed length is also put forward .

在分析已有的 带宽动态分配技术基础上，分析了EPON 上行接入的数学模型，提出了一种基于固定长度的带宽分配算法和一种可变以太网帧长度的IPACT改进算法；

In this paper we present a novel dynamic bandwidth allocation algorithm for EPON ( Ethernet Passive Optical netork ) upstream link named Periodic and Proportional Dynamic Bandwidth Allocation .

提出一种EPON 上行链路动态带宽分配算法&周期比例 DBA。

The effects of message length traffic load of upstream and downstream nodes and the parameters of bandwidth balancing mechanism and network counters on the sojourn time of message in the buffer are investigated which present a valuable reference for the implementation of DQDB MAN .

研究了报文长度、网络 上 下游负荷、 带宽平衡参数和网络计数器级数对报文在缓存器中停留时间的影响。所得结果可为DQDB城域网的具体实现提供参考。

Upstream bandwidth resource is assigned according to different T-CONT priority in the algorithm .

该算法按照不同T-CONT业务的优先级顺序分配 上行 带宽资源。

This way can well coordinate the upstream channel access of all the CMs so reduce the collision rate and promote the bandwidth utilization .

这种机制能够较好地协调各个CM的 上行信道接入，以减少数据冲突，提高 上行 信道 带宽利用率。

An important feature of EPON architecture is to share the transmission media between multiple subscribers . Dynamic bandwidth allocation ( DBA ) schemes provide statistical multiplexing in the upstream channel allowing bandwidth to be effectively and fairly allocated .

EPON结构的一个重要特性是在多用户间共享传输介质，动态带宽分配（DBA）机制提供了 上行信道的统计复用，以达到高效和公平的 带宽分配，这是本文研究的核心内容。

Upstream access and dynamic bandwidth allocation which have important meaning in raising the service quality of EPON and reducing packet delay and packet loss rate is one of key crucial technologies of EPON system .

EPON中 上行接入及动态 带宽分配对提高系统的服务质量，改进EPON系统时延及以太网帧丢失率等性能指标有着重要的意义，是EPON系统的核心关键技术之一。

At the base of introducing PON technologies this thesis focuses on the research of upstream multiple access control mechanism and relevant bandwidth allocation algorithm of PON MAC that can support multi-service access and provide Qos guarantees .

本文即在介绍PON接入网技术的基础上，重点研究能支持多种业务、并可提供Qos保证的PONMAC层 上行链路控制机制和 带宽分配算法。

A good dynamic bandwidth allocation algorithm should be able to guarantee all users ' fairly sharing of upstream bandwidth and also to ensure the EPON system has high throughput in both the uplink and the downlink channels .

一种好的动态带宽分配算法应该能够保证所有用户公平地共享 上行 带宽、系统的上下行信道均具有较高的吞吐量。

Research of Upstream Channel Bandwidth Allocation Algorithm In HFC Network

HFC网络中 上行 带宽分配算法的研究

In order to study the support structure of the distributed EPON access DBA algorithm on the EPON system upstream bandwidth allocation and scheduling mechanism typical DBA algorithm theoretical research .

为了研究支持分布式EPON接入结构的DBA算法，对EPON系统的 上行 带宽分配调度机制和典型的DBA算法进行了理论研究。

On this basis Aiming at the upstream TDM mechanism in EPON system this paper presented a novel dynamic bandwidth allocation algorithm ( PEM-DBA ) which supports traffic estimation and bandwidth pre-allocation .

在此基础之上，针对EPON系统中 上行链路的时分复用机制，提出了一种支持流量预测与预分机制的动态 带宽分配算法（PEM-DBA）。

Based on this some pivotal technologies such as ranging upstream burst synchronization upstream burst optical reception and dynamic upstream bandwidth allocation in ATM PON 's implementation are discussed and the feasible methods for these problems are put forward .

在此基础上，对实现ATM-POH时存在的测距、上行突发同步、上行突发光接收和 上行 带宽动态分配等关键技术进行了探讨，并提出了解决这些难题的可行方法。

The research in this dissertation elaborates the convergence network of EPON and WLAN and emphasizes on the upstream bandwidth allocation algorithm .

本论文的研究以基于EPON网络和WLAN网络下的融合架构展开，并重点研究了融合架构下的 上行链路调度算法。

A novel dynamic bandwidth allocation algorithm for EPON upstream link is proposed named Two-level Dynamic Bandwidth Allocation ( TDBA ) with limited cycle time .

提出一种新的EPON 上行 带宽分配算法&轮询周期受限的双级动态带宽分配算法。

As one of the best solutions for FTTH EPON provides 1 Gbit / s upstream / downstream bandwidth .

作为光纤到户（FTTH）的理想解决方案之一，以太无源光网络（EPON）提供了 1Gbit/s 的 上下行 带宽。