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    • 15. 发明申请
    • AN ADD AND DROP NODE FOR AN OPTICAL WDM NETWORK HAVING TRAFFIC ONLY BETWEEN ADJACENT NODES
    • 用于仅在相邻节点之间进行交通的光学WDM网络的添加和删除节点
    • WO99065165A1
    • 1999-12-16
    • PCT/SE1999/000994
    • 1999-06-08
    • H04B10/275H04J14/02H04Q11/00H04B10/213
    • H04J14/0283H04B10/275H04J14/0204H04J14/0205H04J14/021H04J14/0213H04J14/0289H04Q2011/0083H04Q2011/0092
    • An optical fiber network of WDM type comprises two fibers (7e, 7w) which carry light signals propagating in opposite direction and which are arranged in a ring configuration. In the ring always one link between two neighbouring nodes is inactive but provides a standby-link which is used for failure in another link, in the case of which the previously inactive link is made active. An add and drop (1) node used in the network for only traffic between neighbouring nodes has band blocking filters (31e, 31w) connected in a fiber (7e, 7w) between a drop coupler (17e', 17w') and an add coupler (23e', 23w'). A drop coupler takes out equal shares of the light power to be received through switches (33e, 33w) and bandpass filters (35e, 35w) in receivers (11e, 11w). The add couplers add new wavelength channels produced in transmitters (13e, 13w) in the node through multiplexers (37e, 37w) and switches (39e, 39w). The switches (33e, 33w; 39e, 39w) are used for receiving and transmitting on the wavelength channels in correct directions depending on the location of the inactive link. Thus, the positions of two of the switches have to be changed when the inactive link is one of the two links directly connected to the node. Such a node has a minimum of in-line components and particularly a minimum of in-line filtering components.
    • WDM型光纤网络包括两个光纤(7e,7w),它们携带相反方向传播的光信号,并以环形配置。 在环中总是在两个相邻节点之间的一个链路是不活动的,但是提供了在另一个链路中用于故障的备用链路,在其中先前不活动的链路被激活的情况下。 在网络中仅用于相邻节点之间的业务的添加和删除(1)节点具有连接在分接耦合器(17e',17w')和添加的分支耦合器(17e',17w')之间的光纤(7e,7w)中的带阻滤波器(31e,31w) 耦合器(23e',23w')。 放电耦合器通过开关(33e,33w)和接收器(11e,11w)中的带通滤波器(35e,35w)获得相等的光功率份额。 添加耦合器通过多路复用器(37e,37w)和开关(39e,39w)在节点中的发射机(13e,13w)中产生新的波长信道。 开关(33e,33w; 39e,39w)用于根据无效链路的位置在正确的方向上在波长信道上进行接收和发送。 因此,当非活动链路是直接连接到节点的两个链路中的一个时,必须改变两个交换机的位置。 这样的节点具有最小的在线组件,特别是最小的在线过滤组件。
    • 16. 发明申请
    • METHOD FOR CONSTRUCTING A HIERARCHIC MULTI-RING NETWORK ON FIBER-OPTIC COMMUNICATION LINES, VARIANTS AND BASIC NETWORK FOR REALISING THE SAME
    • 用于构建光纤通信线路上的分层多环网络的方法,用于实现该网络的变体和基本网络
    • WO99062201A1
    • 1999-12-02
    • PCT/RU1998/000342
    • 1998-10-23
    • H04B10/27H04B10/275H04J14/00H04B10/12
    • H04B10/271H04B10/275
    • The present invention relates to a method that involves, in a first embodiment, laying a multicore main cable (MC) made of optical fibres. A ring with a first hierarchic level (R1) is formed from the MC, while at least one ring with a second hierarchic level (R2) is formed from said MC. The ring R1 is connected to a central station (CS) which is in turn connected to a central communication unit (CCU). The ring R2 is connected to the ring R1 through a first-level switching station (SS). A second ring R1 is then formed for encompassing another three-dimensional area and is connected to a second CS which is in turn connected to a CCU. Both CS are arranged in the vicinity of the network geometric centre. At least one second ring R2 is then formed and connected to the second ring R1 through its first-level SS. During the formation of ring R2, the number of optical fibres in the MC exceeds by at least two fibres the number required for connecting the SS. The growth of the network is carried out by forming at least one additional R1 ring which is connected to its third CS connected to a CCU. During the formation of the additional R1 ring, the method involves using the optical fibres in the sections of the MC already laid and used for the formation of R2. According to a second embodiment, the growth of the network is carried out by widening one of the R1 rings with a first hierarchic level in order to encompass a large three-dimensional area. To this end, the method involves using the optical fibres in the sections of the MC already laid and used for the formation of R1 and R2. This invention also relates to a basic network that comprises two rings with a first hierarchic level (R1), wherein the number of optical fibres in the MC for the R2 is larger than that required for connecting the SS.
    • 本发明涉及一种在第一实施例中包括由光纤制成的多核主缆(MC)的方法。 从MC形成具有第一层级(R1)的环,而从所述MC形成具有第二层级(R2)的至少一个环。 环R1连接到中央站(CS),中央站又连接到中央通信单元(CCU)。 环R2通过第一级交换站(SS)连接到环R1。 然后形成第二环R1用于包围另一个三维区域,并且连接到第二CS,CS另外连接到CCU。 两个CS都布置在网络几何中心附近。 然后形成至少一个第二环R2,并通过其第一级SS连接到第二环R1。 在形成环R2期间,MC中的光纤数量超过连接SS所需的数量的至少两根光纤。 网络的增长是通过形成至少一个额外的R1环来进行的,R1环连接到连接到CCU的第三CS。 在形成额外的R1环期间,该方法包括在已经铺设并用于形成R2的MC的部分中使用光纤。 根据第二实施例,网络的增长是通过以第一层次级加宽R1环中的一个来实现的,以便包围大的三维区域。 为此,该方法涉及在已经铺设并用于形成R1和R2的MC的部分中使用光纤。 本发明还涉及包括具有第一层级(R1)的两个环的基本网络,其中用于R2的MC中的光纤数量大于连接SS所需的光纤数量。