Abstract:
PURPOSE: A method for registering an ONU in a gigabit-capable passive optical network is provided to efficiently execute processes by using an identifier for identifying request frames and window frames in a power leveling process, an SN(Serial Number) process, and a ranging process. CONSTITUTION: An OLT(Optical Line Termination) displays a process for registering an ONU(Optical Network Unit) generates a request frame including a request field for identifying each process, and transmits the generated request frame to the ONU. The ONU executes the process, generates a window frame displaying that the window frame is a response to the request frame, and transmits the window frame.
Abstract translation:目的:提供一种在千兆比特无源光网络中注册ONU的方法,以通过在功率调配过程,SN(序列号)过程和测距中使用用于识别请求帧和窗口帧的标识符来有效地执行处理 处理。 构成:OLT(Optical Line Termination,光线路终端)显示用于注册ONU的过程(Optical Network Unit)生成包括用于识别每个进程的请求字段的请求帧,并将生成的请求帧发送到ONU。 ONU执行该处理,生成显示窗口帧是对请求帧的响应的窗口帧,并发送窗口帧。
Abstract:
PURPOSE: A GEM(GPON(Gigabit-capable Passive Optical Network) Encapsulation Method) frame structure for displaying a payload type of a frame is provided to allow GEM clients to exchange control information by defining a control frame in a GEM frame structure. CONSTITUTION: A GEM frame is divided into a GEM header(500) and a GEM payload(510). The GEM header(500) includes a payload type field(501). The GEM header(500) bears information on the GEM payload(510) including values for indicating a length of the GEM payload(510) and identifying a traffic for providing traffic multiplexing. The payload type field(501) indicates whether a corresponding GEM frame is a control frame, a TDM data frame or an Ethernet data frame.
Abstract:
PURPOSE: A data processing method in a GPON(Gigabit-capable Passive Optical Network) is provided to transfer ONT(Optical Network Termination) management control information to an ONU(Optical Network Unit) supporting a GEM(GPON(Gigabit-capable Passive Optical Network) Encapsulation Method) mode. CONSTITUTION: When a frame to be transmitted is inputted(601), the inputted frame is checked whether it is an ATM(Asynchronous Transfer Mode) frame(602). If the inputted frame is the ATM frame, it is transmitted as the ATM frame(603). If the inputted frame is not the ATM frame, the frame is determined as a GEM frame and it is checked whether the corresponding frame is a data frame(604) If the inputted frame is the data frame, the data frame is encapsulated with TDM(Time Division Multiplex) data(606) or with Ethernet data(607) depending on whether the corresponding data is transmitted in TDM mode or Ethernet mode, and then is transmitted. If the inputted frame is not the data frame, a control frame is generated and transmitted(608).
Abstract:
PURPOSE: A transmission method for authentication and privacy security in a tree-structured network is provided to present an encryption mechanism to secure a secrete in a network having a point-to-multipoint tree structure. CONSTITUTION: An Ethernet frame format to execute an encryption function is composed of a PA(Preamble) field(400), a DA(Destination Address) field(402), an SA(Source Address) field(404), an L(Length)/type field(406), an LLID tag field(408), an Enc(Encryption) tag field(410), a PDU(Packet Data Unit) field(412), an IC(Integrity Check) field(414), and an FCS(Frame Check Sequence) field(416). The LLID means an identifier for each entity in authentication or key allocation. The Enc tag field(410) indicates whether a frame is encrypted. The Enc tag field(410), containing the data of a block(420), consists of an Enc tag type field and an Enc tag information field. The Enc tag information field has information necessary for encryption/decoding, such as key synchronization, a version, an IV(Initialization Vector), etc. The IC field(414) exists for the integrity check of a message contained in the PDU field(412). The FCS field(416) is used to check whether an error exists between a link and an MAC layer.
Abstract:
PURPOSE: A method for assigning a data transmission band of an ONU(Optical Network Unit) in a gigabit Ethernet PON(Passive Optical Network) and a message field structure therefor are provided to improve the fairness among a plurality of ONUs by assigning the data transmission band with respect to a transmission bandwidth necessary for an OLT(Optical Line Termination) and the number of end users connected to each ONU. CONSTITUTION: An ONU(110) grasps the number of end users connected to a plurality of ONUs and a transmission bandwidth necessary for the end users(201). The ONU(110) generates a message including information about the necessary transmission bandwidth(203), and transmits the generated message to an OLT(100)(205). The OLT(100) analyzes messages received from a plurality of the ONUs(207), and assigns a band according to the number of the end users and necessary transmission bandwidth information(209).
Abstract:
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).
Abstract:
PURPOSE: A method for transmitting an OAM(Operation, Administration and Maintenance) packet in a PON(Passive Optical Network) is provided to prevent blocking of even an OAM packet using a MAC client packet format in a PAUSE operation by correcting the PAUSE operation defined in IEEE802.3 Clause31 and Annex31B. CONSTITUTION: In transmitting a OAM packet in an EPON(Ethernet PON) including one OLT(Optical Line Terminal) and at least one ONU(Optical Network Unit) connected to the OLT, an MAC control layer recognizes an OAM frame so as not to block OAM data in a PAUSE operation, identifies the recognized OAM data and transmits it to a lower layer of the MAC. When PAUSE occurs at a point 'A', the OAM packet can be transmitted by the method 2 and, at a point 'B', the OAM packet can be transmitted by necessarily using both the method 1 and the method 2.
Abstract:
PURPOSE: An OAM(Operations Administration and Maintenance) method in an EPON(Ethernet Passive Optical Network) is provided to receive a response frame for an OAM frame transmitted from an ONU(Optical Network Unit), and to decide whether the response frame is an available frame, thereby carrying out a more efficient function. CONSTITUTION: An OLT(Optical Line Terminal) transmits a ping request/loopback frame to ONUs(500). The OLT waits for a ping response/loopback frame from the ONUs(502). The OLT decides whether the ping response/loopback frame is received(504). If so, the OLT decides whether the received ping request/loopback frame arrives within predetermined time(506). When deciding whether the received ping request/loopback frame arrives within the predetermined time, the OLT decides by using a time stamp field.
Abstract:
PURPOSE: A method for switching Ethernet passive optical network and a layer 2 is provided to realize subscriber-to-subscriber communication as well as ONU-to-ONU within the layer 2. CONSTITUTION: A predetermined PHY ID is granted to each service port or subscriber port(S1,...,S9) connected with each ONU(Optical Network Unit)(450,510,550). The PHY ID is tagged and filtered to a transmission frame by using PHY ID tagging/detagging layers(455,515,555). An Ethernet frame has the predetermined port connected with the ONU as a destination is transmitted through a port of an L2(Layer2) switch(440) assigned to the port in case that an OLT(Optical Line Termination)(410) receives the Ethernet frame.
Abstract:
PURPOSE: A point-to-point emulation method in a GE-PON(Gigabit Ethernet Passive Optical Network) is provided to offer an Ethernet frame structure for peer-to-peer transmission in a GE-PON system and to embody point-to-point emulation by using the Ethernet frame structure. CONSTITUTION: In a PON structure that consists of one OLT(Optical Line Termination)(30) and a plurality of ONUs(Optical Network Units)(32a-32d), the OLT(30) comprises an 802.3 PHY(PHYsical) field, an 802.3 MAC(Media Access Controller) field, a bridge(60), and a PON ONU MUX/DEMUX block(70). The bridge(60) has ports(61-64) respectively mapped to ONUs 1 through n for point-to-point emulation and a normal port(65) to process not a PON tagging Ethernet frame but an existing Ethernet frame. The PON ONU MUX/DEMUX block(70), when an Ethernet frame is transmitted from the OLT to an ONU, sets the Ethernet type as a PON Ethernet tagging frame, and sets an allocated ONU ID to an ONU ID tag. In case that an Ethernet frame is transmitted from an ONU to the OLT, the PON ONU MUX/DEMUX block(70) checks whether the Ethernet type is set as a PON Ethernet tagging frame. Each ONU(32a-32d) comprises an 802.3 PHY field, an 802.3 MAC field, a PON ONU ID filtering block(50), and an LLC(Logical Link Control)(40).
Abstract translation:目的:提供GE-PON(千兆以太网无源光网络)中的点对点仿真方法,为GE-PON系统中的点对点传输提供以太网帧结构, 通过使用以太网帧结构进行点仿真。 构成:在由OLT(Optical Line Termination,光线路终端)(OLT)和多个ONU(Optical Network Unit)(32a-32d)组成的PON结构中,OLT(30)包括802.3 PHY(PHYsical) 802.3 MAC(媒体接入控制器)字段,桥(60)和PON ONU MUX / DEMUX块(70)。 桥(60)具有分别映射到ONU 1至n以进行点对点仿真的端口(61-64)和用于处理不是PON标记以太网帧而是现有以太网帧的正常端口(65)。 PON ONU MUX / DEMUX块(70)将以太网帧从OLT发送到ONU时,将以太网类型设置为PON以太网标记帧,并将分配的ONU ID设置为ONU ID标签。 在以太网帧从ONU发送到OLT的情况下,PON ONU MUX / DEMUX块(70)检查以太网类型是否被设置为PON以太网标记帧。 每个ONU(32a-32d)包括802.3 PHY字段,802.3 MAC字段,PON ONU ID过滤块(50)和LLC(逻辑链路控制)(40)。