WO2007053995A1 - Plaque arrière atca, platine de concentrateur se connectant avec celle-ci et système correspondant - Google Patents

Plaque arrière atca, platine de concentrateur se connectant avec celle-ci et système correspondant Download PDF

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Publication number
WO2007053995A1
WO2007053995A1 PCT/CN2006/001578 CN2006001578W WO2007053995A1 WO 2007053995 A1 WO2007053995 A1 WO 2007053995A1 CN 2006001578 W CN2006001578 W CN 2006001578W WO 2007053995 A1 WO2007053995 A1 WO 2007053995A1
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WIPO (PCT)
Prior art keywords
connector
board
zone
backplane
node
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Application number
PCT/CN2006/001578
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English (en)
French (fr)
Inventor
Yingli Cui
Yansong Li
Jian Feng
Jian Zhang
Haipei Zhu
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2007053995A1 publication Critical patent/WO2007053995A1/zh

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/04—Assemblies of printed circuits
    • H05K2201/044—Details of backplane or midplane for mounting orthogonal PCBs

Definitions

  • the present invention relates to a communication device, and more particularly to an ATCA backplane, an ATCA switchboard connected to the ATCA backplane, and an ATCA system. Background technique
  • PICMG PCI Industrial Computer Manufacturers Group
  • ATCA Advanced Telecommunications Computing Architecture
  • the boards in a chassis can be divided into a front board and a rear board.
  • the front board includes two types: a node board (Bub Board) and a switch board (Hub Board).
  • the extension of the front board mainly provides an external interface for system maintenance.
  • the ATCA system takes full advantage of the latest advances in Ethernet switching technology and other high-speed serial interconnect technologies, using 10/100/1000BASE-T as the management interface in the BASE plane, and GE SerDes, InfiniBand, PCI Express, Serial RapidlO in the FABRIC plane.
  • the system is used for the edge layer or core layer of the network, which can meet the requirements of high-performance data processing platforms for products such as fixed network, wireless, and transmission.
  • the topology of the ATCA system can be selected from double-star, double-star, full-interconnect, etc., to meet the high reliability requirements of different application fields.
  • the ATCA system can use the frame of the 14-slot, 16-slot, etc.
  • Figure 1 is a board assignment diagram of a typical 14-slot chassis.
  • Zonel the interface between the front card and the backplane is divided into two parts: Zonel and Zone2.
  • Zonel mainly performs power access and system management functions.
  • Zone2 To complete the transfer of business data, the BASE plane and FABRIC plane mentioned above are defined in the Zone2 area.
  • Zone3 The interface between the front and rear boards is defined in Zone3, which is an area above the backplane.
  • the front and rear boards are not connected to the backplane here, but directly through their respective connectors. Connected, this is a special feature of the ATCA system.
  • Zonel, Zone2, and Zone3 are arranged in order from bottom to top.
  • the front board is only connected to the backplane in the Zonel and Zone2 areas, and the front and rear boards are only in the Zone3 area. Directly connected.
  • Zonel and Zone2 connectors are clearly defined in the PICMG 3.0 specification. All manufacturers' ATCA systems must comply, otherwise they cannot guarantee each other. Compatibility, but the Zone3 connector is not strictly defined in these aspects, and can be customized by each manufacturer according to their own needs, which means that the front and rear boards must be used together.
  • the node boards defined in the PICMG3.0 specification are mainly used to access external FE (Fast Ethernet), GE (Gigabit Ethernet), ATM (Asynchronous Transfer Mode), Broadband services such as POS (Packet Over SDH/Sonet, SDH/Sonet-based IP services, including: SDH, Synchronous Digital Hierarchy, Synchronous Digital Hierarchy), processed by high-performance general-purpose processors, digital signal processors, and networks on the board
  • POS Packet Over SDH/Sonet, SDH/Sonet-based IP services, including: SDH, Synchronous Digital Hierarchy, Synchronous Digital Hierarchy), processed by high-performance general-purpose processors, digital signal processors, and networks on the board
  • the device performs real-time processing; the switching board is used to forward broadband service data from the node board at a rate of 10 Mbps, 100 Mbps ⁇ 1000 Mbps or higher.
  • the broadband described herein refers to an Ethernet interface and service at a rate of 10 Mbps, 100 Mbps, 1000 Mbps, or 10 Gbps, but is not limited to the above interfaces and services, and is narrow as described herein.
  • the band refers to the El interface and service at a rate of 2.048 Mbps, or the T1 interface and service at a rate of 1.544 Mbps, but is not limited to the above interfaces and services. Summary of the invention
  • the present invention provides a double-sided ATCA backplane, a switchboard for use with the switchboard, and a rear plug-in board of the switchboard and an ATCA system to solve the problem that the existing ATCA system cannot simultaneously support the wide and narrowband services.
  • An ATCA backplane includes a slot of a switch board and a slot of a node board.
  • the switch board slot is provided with at least one Zone 2 switchboard connector in the area Zone2, and the slot of the node board is in Zone2.
  • the at least one port of the zone 2 node is connected to the at least one port of the zone 2 node card connector.
  • the switch board slot is connected to the switch. And extending to the Zone 3 and providing a Zone 3 switchboard connector at the extension, wherein: at least one port of the Zone 3 switchboard connector is connected to at least one port of the Zone 2 node card connector through a backplane trace.
  • Zone3 switchboard connector One side of the Zone3 switchboard connector is disposed on the extension of the slot of the switch board, and another Zone3 switchboard connector is disposed on the other side, and the other side is provided with a Zone3 rear card connector, and the other Zone3 switch
  • the ports of the board connectors are connected to the ports of the Zone3 rear board connector through the backplane traces.
  • the switch board slots include two backups of each other.
  • the zone 2 node board connector includes at least a P23 node board connector, wherein at least one of the 7th to 10th rows of the P23 node board connector is connected to the Zone 3 exchange order through a backplane trace. At least one port of the board connector.
  • the zone 2 node board connector includes at least one P24 node board connector, wherein at least one port of the P24 node board connector is connected to at least one port of the Zone 3 switch board connector through a backplane trace.
  • a switchboard connected to the ATCA backplane includes a backplane connector, and the backplane connector includes a Zone3 backplane connector disposed in Zone3.
  • the Zone3 backplane connector includes two sets arranged one above the other.
  • the backplane connector also includes a Zone2 backplane connector disposed in Zone 2.
  • An ATCA system includes a backplane, a switchboard, a node board, and a rear board.
  • the backplane includes a switch board slot and a node board slot.
  • the switch board slot is set in the area Zone2.
  • There is at least one Zone 2 switch board connector, and the node board slot is provided with at least one Zone 2 node board connector connected to the node board in the Zone 2, and at least one port of the Zone 2 switch board connector
  • the switch board is connected to the at least one port of the single-board connector of the Zone 2 node; the switch board slot is extended to the zone 3, and a Zone 3 switchboard connector is disposed at the extension, and the switch board passes through
  • the Zone2 switchboard connector and the Zone3 switchboard connector are connected to the backplane, wherein: at least one port of the Zone3 switchboard connector is connected to the Zone2 node card connector through a backplane trace. At least one port.
  • Zone 3 switchboard connector One side of the Zone 3 switchboard connector is disposed on an extension of the slot of the switch board, and another one of the Zone 3 switchboard connectors connected to the switchboard is disposed on the other side, and the switch board is connected on the other side.
  • the Zone3 rear board connector of the rear board, the port of the other Zone3 switch board connector is connected to the port of the Zone3 rear board connector through the backplane wiring.
  • the node board connects to the rear board of the node board through the connector in Zone 3.
  • the present invention provides an ATCA backplane with a wide and narrow band, a switchboard for the application, and a rear card of the switchboard, and an ATCA system.
  • the switchboard slot of the ATCA backplane supports a wide and narrowband exchange list.
  • Board Human Board
  • node board and rear board slot still support node board and rear board according to PICMG3.0 specification, and node list
  • the board can also have narrowband service access, which greatly increases the flexibility, service capacity and integration of the system.
  • Figure 1 is a schematic diagram of the board allocation of the existing 14-slot chassis
  • FIG. 2 is a schematic diagram of connection of front and rear plug-in boards of the existing ATCA system; 3 is a schematic structural view of the backplane of the present invention, wherein the slot of the switchboard extends to Zone3; FIG. 4 is a schematic diagram of the connection of the switchboard, the rearboard, and the backplane when the backplane of the present invention is used; 5 is a schematic diagram of signal flow direction for supporting both wide and narrowband services;
  • FIG. 6 is a schematic diagram showing the connection of a node board, a rear board, and a back board when the backboard of the present invention is used. detailed description
  • the present invention mainly provides a wide and narrowband integrated ATCA backplane design solution, so as to meet the requirements of supporting both the wideband and narrowband services of the node board and the switching board, and focusing on the differences with the PICMG3.0 specification, and the same as the specification. It is no longer stated.
  • Zonel is used to access the power supply and system.
  • Zone2 is used to access broadband service data, otherwise it cannot be compatible with the specification.
  • Zone3 is used to interconnect the switchboard and its rear-board. It has no signal connection with the backplane.
  • the narrowband service from the node can also be achieved through the backplane.
  • the backplane structure provided by the present invention is mainly improved in the slot of the switchboard and the slot of the rear-plugged board corresponding to the switchboard, and the design of supporting the narrowband service is added to the node board.
  • the slot structure of the 14-slot ATCA backplane 1 is improved, wherein the dotted line portion is a standard ATCA backplane, and the solid line portion is a modified ATCA backplane.
  • the maximum height of Zone 3 is 95.1 mm.
  • various types of connectors can be selected as needed, such as ZD connectors, 2 mm connectors, etc., and the number of connectors is not limited.
  • the switch boards in the Zone3 are divided into two groups. The first group is used to receive narrowband service data from the node board. To reduce the number of pins, With tubular backplane wiring and improved anti-interference capability, each node board can transmit narrowband service data to two exchanges through differential transmission.
  • the 12-node board has a total of 24 pairs of differential signals; the second group can serve as a signal path between the switching board and its rear board.
  • the backplane In order to interface with the switch board at Zone3, the backplane must also provide paired connectors in Zone3.
  • the rear board of the switch board is used as an extension of the front board signal and can be used to provide a level connection port.
  • the backplane is connected to the switch board in the slot of the switch board.
  • the two sets of connectors are connected to the switch board. Therefore, it must provide a set of connectors and rear inserts in the rear panel slots of the switch board.
  • the boards are connected at Zone3. In this way, the switch board and its rear board are not directly connected to the Zone3, but are respectively connected to the connectors on the backplane, and then connected through the backplane traces, which is different from the PICMG3.0 specification. .
  • the backplane of the present invention includes the following three parts of different functional connectors on the switch board slot:
  • the first part is the connector set in the Zonel domain, which is mainly used for access to functions such as power access and system management.
  • the second part is the connector set in the Zone2 domain.
  • the PICMG3.0 specification specifies five ZD connectors, which are respectively defined as P20 to P24 connectors for the exchange of broadband services.
  • the third part is the connector set in the Zone3 domain. Generally, it includes two groups. One group is used for the exchange of narrowband services. It can be defined as the P30 connector by referring to the PICMG3.0 specification, and the other group is used to exchange boards and The rear board connection can be defined as the P31 connector and the ⁇ 3 ⁇ connector according to the PICMG3.0 specification.
  • the P31 and P31 ' connectors are connected by the backplane trace, the P31 connector is used to connect the switch board, and the P31 'connector is used. Connect the rear card of the switch board.
  • the connector on the switch board is configured correspondingly to the three-part connector.
  • FIG. 4 it is a schematic diagram of the connection of the backplane 1, the switchboard 2, and the rear board 3: the switchboard 2 is connected to the backplane 1 through the P20-24 connector located in the switch board slot Zone2.
  • the switch is connected to the backplane 1 through the P30 connector on the switch board slot Zone3.
  • the P20-24 connector is connected to the connector of the Zone2 in the slot of the board through the backplane cable to provide a path for broadband service switching.
  • the P30 connector is connected to the shelf of the node board through the backplane 1
  • the port is used to provide a path for narrowband service switching.
  • the P31 and P31' connectors are used to exchange the rear board 3 corresponding to the board 2 connection for extending the service signal.
  • P20 ⁇ 24 connectors are ZD connectors, P30, P31 and ⁇ 3 ⁇ connectors select ZD connectors or 2mm connectors as needed.
  • the flow of the service signal is as shown in Figure 5, where the thick line indicates the broadband service, and the thin line indicates the narrowband service.
  • the broadband service data sent by the node board 4 passes through the connector of the Zone2 to the backplane 1, and then from the slot of the switch board. Zone 2 to the switching board 2; the narrowband service data sent by the node board 4 is also transmitted to the backplane 1 through the Zone2 connector, and then from the Zone 3 of the switching board slot to the switching board 4.
  • the connection between the node board 4, the rear board 3, and the backplane 1 is not extended in the slot 3 of the switch board slot. Change, so you can still use the node board 4 and its rear board 3 that conform to the PICMG3.0 specification. They are only connected by the connector located in the Zone3 domain, that is, the P40 and ⁇ 4 ⁇ connectors shown in Figure 6, the rear board 2 There is no signal connection with the backplane 1.
  • the dotted line in Figure 6 is the slot of the switch board, which is shown in the extended part of Zone3.
  • the first and second rows are used as the fabric channel 2
  • the third and fourth rows are used as the fabric channel 1
  • the fifth row is used as the base channel 1
  • the sixth row is used as Base channel 2
  • the remaining 4 lines are reserved and can be defined as needed, as shown in Table 1.
  • Base channel 1 Base channel 1 2 ports, 4 pairs of differential lines 6 Base channel 2 2 ports, 4 pairs of differential lines
  • each port consists of a pair of differential transmit signals and a pair of differential receive signals. It is used to transmit narrow-band service data and is connected to two switchboards through backplane traces to form a double-star structure, which can improve system reliability.
  • all signal pins on the P24 connector of the node board Zone2 are reserved, and the same function can be completed by itself. Since the narrowband service signals are defined on the reserved pins of the connector, the board that conforms to the PICMG3.0 specification does not use these pins, so the backplane is compatible for both node boards.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Structure Of Telephone Exchanges (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Description

一种 ATCA背板和与该背板连接的交换单板及系统 技术领域
本发明涉及通信设备， 特别涉及一种 ATCA背板、 与该 ATCA背板连接 的 ATCA交换单板及组成的 ATCA系统。 背景技术
通信技术的发展和应用领域的扩大， 在客观上对通信设备的容量、 可靠 性、 可扩展性和可管理性等方面提出了越来越高的要求。 顺应这一发展趋势， 标准化组织之一的 PICMG ( PCI Industrial Computer Manufacturers Group, PCI 工业计算机制造商协会 )在 2002年提出了一种全新的称为 ATCA ( Advanced Telecommunications Computing Architecture, 先进的电信计算架构) 的开放硬 件平台， 并为此制订了 PICMG3.0规范, 对它的机械结构、 供电、 散热、 系 统管理、 数据传输接口、 背板规格等方面进行了详细的说明。 根据这一规范， 一个机框里的单板可以分为前插板和后插板， 前插板包括节点单板 ( Node Board )和交换单板（Hub Board )两种， 后插板作为对应前插板的延伸， 主要 提供对外接口， 便于系统维护。
ATCA 系统充分利用了以太网交换技术和其他高速串行互连技术的最新 进展，在 BASE平面使用 10/100/1000BASE-T作为管理接口， FABRIC平面可 以使用 GE SerDes、 InfiniBand, PCI Express、 Serial RapidlO等作为业务数据 的传输接口， 系统用于网络的边缘层或核心层， 可以满足固网、 无线、 传输 等产品对高性能数据处理平台的需求。 ATCA 系统的拓朴结构可以选择双星 型、 双双星型、 全互连等， 可以满足不同应用领域对高可靠性的要求。
根据对系统容量的不同要求， ATCA系统可以使用 14槽位、 16槽位等规 格的机框， 图 1是一个典型的 14槽位机框的单板分配图。
如图 2所示， 在 ATCA系统中， 前插板与背板之间的接口按照功能划分 为 Zonel和 Zone2两部分， Zonel主要完成电源接入、系统管理等功能， Zone2 完成业务数据的传输， 上文中提到的 BASE 平面和 FABRIC 平面就定义在 Zone2区域。 前插板与后插板之间的接口定义在 Zone3, 这是位于背板上方的 一个区域， 前插板和后插板在此处都与背板没有连接， 而是通过各自的连接 器直接相连的， 这是 ATCA系统的一个特殊之处。
仍如图 2所示 ,可以看出 Zonel、 Zone2和 Zone3是从下到上依次排列的， 前插板只在 Zonel和 Zone2区域与背板存在连接，前插板和后插板仅在 Zone3 区域直接相连。
不论是前插板还是背板， 它们使用的 Zonel和 Zone2连接器的类型、 信 号定义和用途在 PICMG3.0规范中都有明确的定义， 所有厂家生产的 ATCA 系统必须遵从， 否则无法保证相互的兼容性， 但是 Zone3连接器在这些方面 均没有严格规定， 可以由各厂家根据自己的需要自行定义， 这也意味着前插 板和后插板必须配套使用。
PICMG3.0 规范中定义的节点单板主要用于接入来自外部的 FE ( Fast Ethernet,快速以太网）、 GE( Gigabit Ethernet,千兆以太网）、 ATM( Asynchronous Transfer Mode,异步转移模式）、 POS( Packet Over SDH/Sonet，基于 SDH/Sonet 的 IP业务， 其中： SDH, Synchronous Digital Hierarchy, 同步数字体系）等宽 带业务， 通过单板上的高性能通用处理器、 数字信号处理器和网络处理器进 行实时处理； 交换单板用于转发来自节点单板的宽带业务数据， 速率可以是 10Mbps, 100Mbps ^ 1000Mbps或者更高。
为了进一步提高 ATCA系统的容量和适应性， 满足宽窄带一体化产品的 设计需求， 实现目前宽窄带并存的网络向纯宽带网络的顺利过渡, 有必要在 ATCA系统中引入 TDM ( Time Division Multiplexing, 时分多路复用）接入和 交换功能。 由于 PICMG3.0规范中定义的 ATCA系统主要针对的是宽带业务， 并没有考虑为窄带业务提供足够的支持， 因此为了实现这一需求， 必须对 ATCA系统的背板、节点单板和交换单板进行必要的改进， 同时尽量与规范保 持一致。 其中， 本文所述的宽带是指速率为 10Mbps、 100Mbps、 1000Mbps 或 lOGbps的以太网接口及业务， 但是不限于上述接口及业务， 本文所述的窄 带是指速率为 2.048Mbps的 El接口及业务， 或者是速率为 1.544Mbps的 T1 接口及业务， 但是不限于上述接口及业务。 发明内容
本发明提供一种双面插 ATCA背板、 配合应用的交换单板和该交换单板 的后插板以及组成的 ATCA系统， 以解决现有 ATCA系统不能同时支持宽窄 带业务的问题。
一种 ATCA背板， 包括交换单板槽位和节点单板槽位， 所述交换单板槽 位在区域 Zone2中设置有至少一个 Zone2交换单板连接器， 所述节点单板槽 位在 Zone2中设置有至少一个 Zone2节点单板连接器， 所述 Zone2交换单板 连接器的至少一个端口通过背板走线相连所述 Zone2节点单板连接器的至少 一个端口； 所述交换单板槽位延伸到 Zone3并在该延伸部位设置有 Zone3交 换单板连接器， 其中： 所述 Zone3 交换单板连接器的至少一个端口通过背板 走线相连所述 Zone2节点单板连接器的至少一个端口。
在所述交换单板槽位的延伸部位设置所述 Zone3 交换单板连接器的一面 还设置有另一个 Zone3交换单板连接器， 另一面设置有 Zone3后插板连接器， 该另一个 Zone3交换单板连接器的端口通过背板走线相连所述 Zone3后插板 连接器的端口。
所述交换单板槽位包括互为备份的两个。
所述 Zone2节点单板连接器至少包括 P23节点单板连接器， 其中， 位于 该 P23节点单板连接器的第 7行至第 10行中至少一个端口通过背板走线相连 所述 Zone3交换单板连接器的至少一个端口。
所述 Zone2节点单板连接器中至少包括 P24节点单板连接器， 其中， 该 P24节点单板连接器的至少一个端口通过背板走线相连所述 Zone3 交换单板 连接器的至少一个端口。
一种与所述 ATCA背板相连的交换单板， 包括背板连接器， 所述背板连 接器包括设置在 Zone3中的 Zone3背板连接器。 所述 Zone3背板连接器包括上下设置的两组。
所述背板连接器还包括设置在 Zone2中的 Zone2背板连接器。
一种 ATCA系统， 包括背板、 交换单板、 节点单板和后插板， 所述背板 包括交换单板槽位和节点单板槽位， 所述交换单板槽位在区域 Zone2 中设置 有至少一个 Zone2交换单板连接器， 所述节点单板槽位在 Zone2中设置有至 少一个连接所述节点单板的 Zone2节点单板连接器， 所述 Zone2交换单板连 接器的至少一个端口通过背板走线相连所述 Zone2节点单板连接器的至少一 个端口； 所述交换单板槽位延伸到 Zone3并在该延伸部位设置有 Zone3交换 单板连接器， 所述交换单板分别通过所述 Zone2交换单板连接器和 Zone3交 换单板连接器连接所述背板， 其中： 所述 Zone3 交换单板连接器的至少一个 端口通过背板走线相连所述 Zone2节点单板连接器的至少一个端口。
在所述交换单板槽位的延伸部位设置所述 Zone3 交换单板连接器的一面 还设置有连接所述交换单板的另一个 Zone3 交换单板连接器， 另一面设置有 连接该交换单板后插板的 Zone3后插板连接器， 该另一个 Zone3交换单板连 接器的端口通过背板走线相连所述 Zone3后插板连接器的端口。
所述节点单板在 Zone3通过连接器连接该节点单板的后插板。
本发明的有益效果如下：
本发明提供了宽窄带一体的 ATCA背板、 配合应用的交换单板和该交换 单板的后插板以及组成的 ATCA系统， 在 ATCA背板的交换单板槽位支持宽 窄带一体的交换单板 (Hub Board), 同时支持它的后插板用于信号后出线; 在 节点单板及其后插单板槽位仍然支持符合 PICMG3.0规范的节点单板和后插 板， 而且节点单板还可以具有窄带业务接入功能， 使系统的灵活性、 业务容 量和集成度都有艮大的提高。 附图说明
图 1为现有 14槽位机框的单板分配示意图；
图 2为现有 ATCA系统的前后插板连接示意图； 图 3为本发明所述背板结构示意图， 其中， 交换单板槽位延伸到 Zone3; 图 4为使用本发明所述背板时， 交换单板、 后插板和背板的连接示意图； 图 5为同时支持宽窄带业务的信号流向示意图；
图 6为使用本发明所述背板时， 节点单板、 后插板和背板的连接示意图。 具体实施方式
本发明主要提供宽窄带一体的 ATCA背板设计方案， 以满足节点单板和 交换单板同时支持宽窄带业务的需求， 重点针对与 PICMG3.0规范的不同之 处进行描述， 而与规范相同之处就不再资述了。
参阅图 2, 根据 PICMG3.0规范的定义， 交换单板与背板之间的接口位于 Zonel和 Zone2, 这两个部分的信号分配和定义是不能改动的， 例如 Zonel用 于接入电源和系统管理， Zone2用于接入宽带的业务数据， 否则无法与规范兼 容。 Zone3本来是用作交换单板与其后插板互连使用的, 与背板没有信号的连 接， 但是为了让交换单板支持窄带交换功能， 使来自节点单板的窄带业务也 能通过背板达到交换单板， 可以将背板在交换单板槽位延伸到 Zone3处， 并 在背板上提供连接器与交换单板的 Zone3连接器配合， 从而为窄带业务数据 到交换单板提供一条通路。 因此本发明提供的背板结构主要是在交换单板槽 位和与交换单板对应的后插单板槽位进行改进， 并在节点单板上增加支持窄 带业务的设计。
如图 3所示， 为 14槽位 ATCA背板 1的插槽改进结构， 其中， 虚线部分 是标准的 ATCA背板， 实线部分是改进之后的 ATCA背板。
在 PICMG3.0规范中， Zone3的最大高度为 95.1mm, 在此条件下可以根 据需要选用各种类型的连接器， 例如 ZD连接器、 2mm连接器等， 连接器的 数量也没有限定。 如果需要同时支持窄带业务的交换功能以及后插板的话， 则交换单板在 Zone3 的连接器分为两组， 第一组用于接收来自节点单板的窄 带业务数据， 为了减少管脚数量、 筒化背板布线和提高抗干扰能力， 每块节 点单板可以采用差分传输方式通过两对差分信号来传输窄带业务数据到交换 单板槽位（发送和接收各一对差分信号）， 信号电平可以使用 LVPECL ( Low Voltage Positive Emitter Coupled Logic, 低压正电源供电的射极耦合逻辑）、 LVDS ( Low Voltage Differential Signalling, 低压差分信号）等， 对于 14槽位 机框来说 12块节点单板一共有 24对差分信号； 笫二组可以作为交换单板与 其后插板之间的信号通道。 为了与交换单板在 Zone3处对接， 背板也必须在 Zone3提供配对的两组连接器。
交换单板的后插板作为前插板信号的延伸， 可用于对外提供级连接口。 由于背板在交换单板槽位已经延伸到 Zone3,并提供了两组连接器与交换单板 相连， 因此它在交换单板的后插单板槽位也必须提供一组连接器与后插板在 Zone3处相连。这样， 交换单板及其后插板在 Zone3不是直接相连的， 而是分 别与背板上的连接器相连， 再通过背板走线连在一起， 这是与 PICMG3.0规 范的不同之处。
如图 4所示， 本发明所述的背板在交换单板槽位上共包括如下三部分不 同功能的连接器：
1、 第一部分为设置在 Zonel域的连接器， 主要用于电源接入、 系统管理 等功能接入；
2、第二部分为设置在 Zone2域的连接器， PICMG3.0规范规定为 5个 ZD 连接器， 分别定义为 P20到 P24连接器， 用于宽带业务的交换；
3、 第.三部分为设置在 Zone3域的连接器， 一般包括两组， 一组用于窄带 业务的交换， 可以参照 PICMG3.0规范定义为 P30连接器， 另一组用于交换 单板和后插板连接， 可以参照 PICMG3.0规范定义为 P31连接器和 Ρ3Γ连接 器， P31和 P31 '连接器之间通过背板走线相连， P31连接器用于连接交换单 板， P31 '连接器用于连接该交换单板的后插板。
交换单板上的连接器配合该三部分连接器相应进行设置。
仍如图 4所示，为背板 1、交换单板 2及其后插板 3的连接示意图：其中， 交换单板 2通过位于交换单板槽位 Zone2的 P20 ~ 24连接器连接背板 1 ,同时 通过位于交换单板槽位 Zone3 的 P30连接器连接背板 1 , 交换单板槽位的 P20 - 24连接器通过背板走线连接节点单板槽位中位于 Zone2的连接器，用于 为宽带业务交换提供途径； P30连接器通过背板 1走线连接节点单板 Zone2 连接器的保留端口， 用于为窄带业务交换提供途径； P31和 P31'连接器用于 交换单板 2连接对应的后插板 3, 用于延伸业务信号。 其中， P20 ~ 24连接器 为 ZD连接器， P30、 P31和 Ρ3Γ连接器根据需要选择 ZD连接器或 2mm连接 器。
业务信号的流向如图 5 所示， 其中粗线表示宽带业务， 细线表示窄带业 务， 节点单板 4发送的宽带业务数据通过 Zone2的连接器到背板 1， 然后从交 换单板槽位的 Zone2到交换单板 2; 节点单板 4发送的窄带业务数据也通过 Zone2连接器到背板 1 , 然后从交换单板槽位的 Zone3到交换单板 4。
如图 6所示， 为节点单板 4、 后插板 3与背板 1之间的连接关系， 由于背 板 1只是在交换单板槽位的 Zone3进行了扩展， 节点单板槽位并没有变化， 因此仍然可以使用符合 PICMG3.0规范的节点单板 4及其后插板 3 ,它们只通 过位于 Zone3域的连接器相连， 即图 6所示的 P40和 Ρ4Γ连接器， 后插板 2 与背板 1没有信号连接， 图 6中虚线部分是交换单板槽位在 Zone3的扩展部 分示意。
对于节点单板槽位 Zone2的 P23连接器来说， 它的第 1、 2行用作 Fabric 通道 2, 第 3、 4行用作 Fabric通道 1， 第 5行用作 Base通道 1 , 第 6行用作 Base通道 2, 剩下的 4行保留， 可以根据需要自行定义， 如表 1所示。
节点单板槽位 Zone2的 P23连接器信号分配
P23连接器的行号 用途 说明
1 2个端口， 4对差分线
Fabric通道 2
2 2个端口， 4对差分线
3 2个端口, 4对差分线
Fabric通道 1
4 2个端口， 4对差分线
5 Base通道 1 2个端口， 4对差分线 6 Base通道 2 2个端口， 4对差分线
7
8
保留 可以自行定义
9
10
为了让节点单板支持窄带业务接入功能，可以在上述 P23连接器的 7、 8、 9、 10行自行定义 2个端口, 每个端口由一对差分发送信号、 一对差分接收信 号组成， 用于传输窄带的业务数据， 并通过背板走线分别连接到两块交换单 板上， 形成双星型结构， 可以提高系统的可靠性。 此外， 节点单板 Zone2的 P24连接器上的所有信号管脚都是保留的， 也可以自行定义完成同样的功能。 由于窄带业务信号是定义在连接器的保留管脚上的， 符合 PICMG3.0规范的 节点单板不会使用这些管脚， 因此背板对于这两种节点单板都是兼容的。 发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种 ATCA背板， 包括交换单板槽位和节点单板槽位， 所述交换单板 槽位在区域 Zone2中设置有至少一个 Zone2交换单板连接器， 所述节点单板 槽位在 Zone2中设置有至少一个 Zone2节点单板连接器， 所述 Zone2交换单 板连接器的至少一个端口通过背板走线相连所述 Zone2节点单板连接器的至 少一个端口， 其特征在于：
所述交换单板槽位延伸到 Zone3并在该延伸部位设置有 Zone3交换单板 连接器， 其中： 所述 Zone3 交换单板连接器的至少一个端口通过背板走线相 连所述 Zone2节点单板连接器的至少一个端口。
2、 如权利要求 1所述的 ATCA背板， 其特征在于， 在所述交换单板槽位 的延伸部位设置所述 Zone3交换单板连接器的一面还设置有另一个 Zone3交 换单板连接器， 另一面设置有 Zone3后插板连接器， 该另一个 Zone3交换单 板连接器的端口通过背板走线相连所述 Zone3后插板连接器的端口。
3、 如权利要求 1所述的 ATCA背板， 其特征在于， 所述交换单板槽位包 括互为备份的两个。
4、 如权利要求 1所述的 ATCA背板， 其特征在于， 所述 Zone2节点单板 连接器至少包括 P23节点单板连接器， 其中， 位于该 P23节点单板连接器的 第 7行至第 10行中至少一个端口通过背板走线相连所述 Zone3交换单板连接 器的至少一个端口。
5、 如权利要求 1所述的 ATCA背板， 其特征在于， 所述 Zone2节点单板 连接器中至少包括 P24节点单板连接器， 其中， 该 P24节点单板连接器的至 少一个端口通过背板走线相连所述 Zone3交换单板连接器的至少一个端口。
6、一种与权利要求 1所述 ATCA背板相连的交换单板，包括背板连接器， 其特征在于， 所述背板连接器包括设置在 Zone3中的 Zone3背板连接器。
7、 如权利要求 6所述的交换单板， 其特征在于， 所述 Zone3背板连接器 包括上下设置的两组。
8、 如权利要求 6或 7所述的交换单板， 其特征在于， 所述背板连接器还 包括设置在 Zone2中的 Zone2背板连接器。
9、 一种 ATCA系统， 包括背板、 交换单板、 节点单板和后插板， 所述背 板包括交换单板槽位和节点单板槽位， 所述交换单板槽位在区域 Zone2 中设 置有至少一个 Zone2交换单板连接器， 所述节点单板槽位在 Zone2中设置有 至少一个连接所述节点单板的 Zone2节点单板连接器， 所述 Zone2交换单板 连接器的至少一个端口通过背板走线相连所述 Zone2节点单板连接器的至少 一个端口， 其特征在于：
所述交换单板槽位延伸到 Zone3并在该延伸部位设置有 Zone3交换单板 连接器， 所述交换单板分别通过所述 Zone2交换单板连接器和 Zone3交换单 板连接器连接所述背板， 其中： 所述 Zone3 交换单板连接器的至少一个端口 通过背板走线相连所述 Zone2节点单板连接器的至少一个端口。
10、 如权利要求 9所述的 ATCA系统， 其特征在于， 在所述交换单板槽 位的延伸部位设置所述 Zone3 交换单板连接器的一面还设置有连接所述交换 单板的另一个 Zone3 交换单板连接器， 另一面设置有连接该交换单板后插板 的 Zone3后插板连接器， 该另一个 Zone3交换单板连接器的端口通过背板走 线相连所述 Zone3后插板连接器的端口。
11、 如权利要求 9或 10所述的 ATCA系统， 其特征在于， 所述节点单板 在 Zone3通过连接器连接该节点单板的后插板。
12、 如权利要求 9所述的 ATCA系统， 其特征在于， 所述交换单板槽位 包括互为备份的两个。
13、如权利要求 9所述的 ATCA系统， 其特征在于， 所述至少一个 Zone2 节点单板连接器中包括 P23节点单板连接器， 该 P23节点单板连接器的第 7 行至第 10行中至少一个端口通过背板走线相连所述 Zone3交换单板连接器的 至少一个端口。
14、 如权利要求 9所述的 ATCA系统， 其特征在于， 所述至少一个 Zone2 节点单板连接器中包括 P24节点单板连接器， 其中， 该 P24节点单板连接器的 至少一个端口通过背板走线相连所述 Zone3交换单板连接器的至少一个端口。
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