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METHOD AND SYSTEM FOR IMPLEMENTING DYNAMIC BANDWIDTH ALLOCATION MECHANISM APPLYING TREE ALGORITHM IN ETHERNET PASSIVE OPTICAL NETWORK
METHOD AND SYSTEM FOR IMPLEMENTING DYNAMIC BANDWIDTH ALLOCATION MECHANISM APPLYING TREE ALGORITHM IN ETHERNET PASSIVE OPTICAL NETWORK
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机译:在以太网无源光网络中应用树算法实现动态带宽分配机制的方法和系统
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摘要
PURPOSE: A method for allocating dynamic bandwidths applying tree algorithm thereto is provided to configure DBACNs(Dynamic Bandwidth Allocation Control Nodes) in tree structure, and to sequentially perform a step of outputting collected bandwidth request information to root nodes from the lowest DBACNs, then to sequentially perform a step of distributing bandwidths to branch nodes from the highest DBACNs, thereby speeding up an operation of complex bandwidth allocation algorithm. CONSTITUTION: Each of tree-structured DBACNs(220A-220G) determines information to be transmitted to upper DBACNs(220A-220G) and lower DBACNs(220A-220G) or ONUs(210A-210H) according to TRGA(Tree Request Grant Algorithm). Bandwidth request information values are collected until bandwidth request information of the ONUs(210A-210H) is transmitted to the highest DBACN(220A) configuring the first level(230A). The highest DBACN(220A) compares a requested entire bandwidth value with an entire allocation available bandwidth value, and selects a smaller value. The rest DBACNs(220B-220G) re-allocate bandwidths transmitted from root nodes to branch nodes, and repeat until bandwidths are allocated to the ONUs(210A-210H) configuring the lowest level(230C). A direction selector(240) alternately switches directions by using clocks every level(230A,230B,230C).
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