WO2009155836A1 - 实现光信道数据单元保护相切环交互的方法和装置 - Google Patents

实现光信道数据单元保护相切环交互的方法和装置 Download PDF

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Publication number
WO2009155836A1
WO2009155836A1 PCT/CN2009/072329 CN2009072329W WO2009155836A1 WO 2009155836 A1 WO2009155836 A1 WO 2009155836A1 CN 2009072329 W CN2009072329 W CN 2009072329W WO 2009155836 A1 WO2009155836 A1 WO 2009155836A1
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WO
WIPO (PCT)
Prior art keywords
unit
node
receiving
service
protected
Prior art date
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PCT/CN2009/072329
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English (en)
French (fr)
Inventor
阎君
陈亘
张波
何达
曾宇
李振宇
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP09768761.0A priority Critical patent/EP2285046B1/en
Publication of WO2009155836A1 publication Critical patent/WO2009155836A1/zh
Priority to US12/979,161 priority patent/US8805181B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/08Intermediate station arrangements, e.g. for branching, for tapping-off
    • H04J3/085Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0278WDM optical network architectures
    • H04J14/0283WDM ring architectures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42Loop networks
    • H04L12/437Ring fault isolation or reconfiguration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J14/00Optical multiplex systems
    • H04J14/02Wavelength-division multiplex systems
    • H04J14/0287Protection in WDM systems
    • H04J14/0293Optical channel protection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J2203/00Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0057Operations, administration and maintenance [OAM]
    • H04J2203/006Fault tolerance and recovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/16Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605Fixed allocated frame structures
    • H04J3/1652Optical Transport Network [OTN]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/0079Operation or maintenance aspects
    • H04Q2011/0081Fault tolerance; Redundancy; Recovery; Reconfigurability
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/009Topology aspects
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q11/00Selecting arrangements for multiplex systems
    • H04Q11/0001Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062Network aspects
    • H04Q2011/009Topology aspects
    • H04Q2011/0092Ring

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a method and apparatus for implementing optical channel data unit (ODUk) protection for tangent ring interaction.
  • ODUk optical channel data unit
  • optical channel data units are typically used to protect the tangent ring to interact with traffic.
  • a commonly used optical channel data unit protection tangent ring is an optical channel data unit shared protection ring (ODUk SPRing) tangent ring, and its networking mode is a tangent ring composed of ODUk SPRing and ODUk SPRing, or ODUk SPRing
  • ODUk SPRing optical channel data unit shared protection ring
  • FIG. 1 it is a networking diagram of a tangential ring of an ODUk SPRing and an ODUk SPRing in the prior art, where a first ODUk SPRing and a second ODUk SPRing form a tangent ring, and in the tangent ring, two Each ODUk SPRing shares a node (hereinafter referred to as an intersecting node), that is, the F node in FIG.
  • the first ODUk SPRing is composed of F, G, H, I, J, and K nodes
  • the second ODUk SPRing is composed of A, B, C, D, E, and F nodes.
  • Each node in each ODUk SPRing has two working units in the sending direction (hereinafter referred to as “sending working unit”) and two protection units (hereinafter referred to as “transmitting protection unit”), in which the working unit is normally transmitted.
  • the channel of the signal, the protection unit is the channel that sends the signal to send the signal when the working unit fails.
  • each node also has two receiving working units for receiving signals and two receiving and protecting units.
  • the second ODUk SPRing needs to switch the service transmission, that is, the A node switches the service on the broken road to A.
  • Another protection unit on the node, and then issued by the security The protection unit is sent to the F node, and then transmitted to the first ODUk SPRing through the sending work unit of the F node.
  • the service 1 sent to the second ODUk SPRing on the F node may be sent to the A node through the F node according to the original path, or may be sent to the E node by the protection unit in the other direction of the F node, and then Send from the E node to the A node.
  • the state after the switching is shown in Figure 1 (a).
  • the state after the switching is as shown in FIG. 1(c). If the transmission of the G node to the F node in the first ODUk SPRing and the transmission of the A node to the F node in the second ODUk SPRing fail, the state after the switching is as shown in FIG. 1(b).
  • the APS protocol interaction must be used first to determine the state of the second ODUk SPRing, and the second ODUk SPRing cannot be obtained in real time through the APS protocol.
  • the state of the second ODUk SPRing is determined by the fact that all nodes on the ring need to interact with the APS protocol, and this time may be long, so that the switching time is long and the first ODUk SPRing is unacceptable. . If it is not necessary to obtain the state of the second ODUk SPRing APS protocol interaction, the first ODUk SPRing switching is determined, and the second ring switching state needs to be assumed, and the first ring is switched according to this assumption.
  • An object of the embodiments of the present invention is to provide a method and apparatus for implementing ODUk protection for tangent ring interaction, which can implement a protected industry when an ODUk protects a link in a tangent ring from failure. It is not interrupted, and multiple switching will not occur, and no switching timeout will occur.
  • the node When the node is an intersecting node, two virtual nodes are established on the node, and a connection is established between the transceiver service unit in each direction in the two directions and the protected receiving and transmitting unit through one of the virtual nodes. .
  • the embodiment of the present invention further provides an apparatus for implementing optical channel data unit protection tangent ring interaction, including:
  • a selecting unit configured to select a node used by the optical channel data unit to protect the tangent ring, and the receiving and transmitting service unit and the protected receiving and transmitting unit on the node;
  • a virtual node establishing unit configured to establish two virtual nodes on the node when the node is an intersecting node, and pass between the transceiver service unit in each direction and the protected receiving and transmitting unit in two directions
  • One of the virtual nodes establishes a connection
  • the connecting unit establishes a connection between the receiving service unit in the same transmission direction and the protected transmitting unit on the node, or establishes a connection between the sending service unit and the protected receiving unit in the same transmission direction on the node.
  • the embodiment of the invention has the following advantages:
  • the service units on the intersecting nodes are established via the virtual connection by setting two virtual nodes on the intersecting nodes of the tangent rings.
  • the technical solution of the invention can reduce the coupling relationship of different protections, reduce the complexity of processing, speed up the switching time, realize the uninterrupted protection service, and improve the reliability of protection.
  • FIG. 1 is a schematic diagram of networking of a tangential ring of an ODUk SPRing and an ODUk SPRing in the prior art
  • 1(a), (b), and (c) are schematic diagrams of interaction states after the tangent ring switching shown in FIG. 1
  • FIG. 2 is a flow chart of an embodiment of a method for implementing ODUk SPRing tangent ring interaction according to the present invention
  • 3 is a schematic diagram of networking of a prior art ODUk SPRing and ODUk SNCP tangential ring
  • FIG. 4 is a flow chart of a method for implementing ODUk SNCP interaction in a tangential ring according to the present invention
  • FIG. 5 is a diagram of the method of FIG. 4 and FIG.
  • FIG. 6 is a flow chart of an embodiment of a method for implementing ODUk SPRing interaction in a tangent ring according to the present invention
  • FIG. 7 is a schematic diagram of a connection state on an intersecting node after ODUk SNCP switching according to the present invention
  • (a) is a schematic diagram of the interaction of the intersecting nodes in the networking after the ODUk SNCP switching of the present invention
  • FIG. 8(b) is a schematic diagram of the interaction of the intersecting nodes in the networking after the ODUk SPRing switching of the present invention
  • FIG. 8(c) is the present invention The interaction diagram of the intersecting nodes in the networking after the ODUk SNCP and the ODUk SPRing are switched;
  • FIG. 9 is a schematic diagram of a connection state on an intersecting node after ODUk SPRing switching according to the present invention.
  • FIG. 10 is a schematic diagram showing a connection state on an intersecting node after ODUk SNCP and ODUk SPRing are both switched;
  • FIG. 11 is a schematic block diagram of an apparatus for implementing ODUk SPRing tangent ring interaction according to the present invention
  • FIG. 12 is a schematic block diagram of another apparatus for implementing ODUk SPRing tangent ring interaction according to the present invention
  • FIG. 13 is another implementation of ODUk SPRing according to the present invention.
  • An ODUk protection tangent ring interaction method disclosed by the present invention is that, for an intersecting node common to two tangent rings, a virtual point is established on the node, and a cross connection based on the virtual point is performed, so that In the case of switching, it is not necessary to use the APS protocol to query the status of another ring and directly perform single mode switching.
  • FIG. 2 it is a block diagram of an embodiment of an interaction method of an ODUk SPRing tangent ring according to the present invention. The method is applied in ODUk SPRing, including:
  • S201 Select a node used by the protected service in the ODUk SPRing, the node is switchable in the tangent ring, for example, for the ODUk SPRing in the tangent ring, any node in the ODUk SPRing may be selected;
  • the ODUk SNCP in the medium may select a source node or a sink node through which the protected service is transmitted in the ODUk SNCP.
  • S202 Select, for the node, a sending service unit used by the protected service.
  • the protected unit may be a branch unit or a line unit.
  • the protected transmitting unit serves as an interface between the local node and the neighboring node, and is configured to send the service in the local node to the adjacent node.
  • S203 Select a sending work unit and a sending protection unit on the node. For example, for ODUk
  • SPRing selects four transmit service units, including two transmit work units and two transmit protection units, which may be referred to as a first transmit work unit and a second transmit work unit, and a first transmit protection unit and a second transmit protection unit, respectively.
  • the first transmitting working unit and the first sending protection unit face one direction of the ring transmission
  • the second sending working unit and the second sending protection unit face the other direction of the ring transmission.
  • S204 Select, for the node, a receiving service unit (called a protected receiving unit) used by the protected service.
  • the protected receiving unit may be the same service unit as the selected sending unit selected in S202, or may select another service unit.
  • the protected receiving unit serves as an interface between the node and the neighboring node, and is configured to receive services from neighboring nodes. .
  • S205 Select a work unit and a protection unit on the node. For example, for ODUk
  • SPRing can select two receiving work units and two receiving protection units, which can be referred to as a first receiving working unit and a second receiving working unit, and a first receiving and protecting unit and a second receiving and protecting unit, respectively.
  • the first receiving working unit and the first receiving and protecting unit face one direction of the ring transmission
  • the second receiving working unit and the second receiving and protecting unit face the other direction of the ring transmission.
  • ODUk SNCP choose one receiving unit and one unit for protection.
  • the receiving work unit and the receiving and protecting unit may be the same service unit as the sending working unit and the sending protection unit selected in S203, or may select other service units. If not, then S207 is performed; otherwise, the S202 is returned to re-select the service unit on the node. If yes, the node is the intersection node of the tangent ring, and S208 is performed; otherwise, S209 is executed.
  • the virtual nodes are respectively used in two directions of service transmission on the node, that is, one virtual node is used as the last node of the service in one transmission direction, and the other virtual node is used as the The first node of the service in another direction of transmission.
  • S209 Establish a connection between the selected service units on the node, that is, establish a connection between the receiving service unit in the same transmission direction and the protected transmission unit on the node, or establish the sending service unit and the protected receiving unit in the same transmission direction. connection. If it is an intersecting node, the business unit also establishes a connection between the virtual nodes.
  • S210 Determine whether to continue to select the node, and if so, re-execute S201 and subsequent steps; otherwise, end.
  • the two rings can reduce the coupling relationship of different protections by overlapping the virtual nodes, that is, when one ring is switched. , no need to use the APS protocol to know the status of another ring. Therefore, the switching time can be increased, and the reliability of the protection can be improved. At the same time, cross resources can be saved because the virtual nodes can not occupy the cross ports outside the node.
  • S202 selects a service unit in the sending direction on the node, selects a service unit in the receiving direction on the node node with S204, and selects a corresponding receiving work unit and a receiving protection unit in the receiving service unit. Then, the service unit in the direction of the direction is selected on the node, and the corresponding sending unit and the protection unit are selected in the sending service unit.
  • the above embodiment is directed to ODUk SPRing.
  • the steps of the ODUk SNCP are the same as those of the above embodiment except that there are no steps S203 and S205. I will not repeat them here.
  • the process of the method is as follows. As shown in Figure 4, the method includes:
  • S401 Select, in the ODUk SNCP, a node used by the protected service, where the node can be switched in a tangent ring, for example, selecting node F.
  • S402 Select a protected sending unit for the node F, where the protected sending unit is used as an interface with another ring transmission service except the ODUk SNCP in the tangential ring, and is used to send the service to the tangent ring. In addition to the ODUk SNCP, another ring.
  • the line branch unit 1 can be selected as the protected transmission unit.
  • S403 Select a sending work unit and a sending protection unit on the node F. Wherein, the sending working unit faces one direction of transmission of the ring, and the sending protection unit faces another transmission direction of the ring transmission.
  • the line branch unit 5 can be selected as the transmitting unit
  • the line branch unit 6 is the transmitting unit.
  • S404 Select a protected receiving unit for the node F.
  • the protected transmitter unit can still select the line branch unit 1.
  • S405 Select, on the node F, a receiving working unit that is in the same transmission direction as the sending working unit, and a receiving and protecting unit that is in the same transmission direction as the sending protection unit. For example, in the eight line branch service units of the node F shown in Fig. 5, the line branch unit 5 can still be selected as the receiving unit, and the line branch unit 6 is the receiving unit. If not, then S407 is performed; otherwise, the S402 is returned to re-select the service unit on the node F. If so, the node is the intersection node of the tangent ring, and at this time, S408 is executed; otherwise, S409 is performed.
  • the virtual nodes are respectively used in two directions of service transmission on the node, that is, one virtual node is used as the last node of the service in one transmission direction, and the other virtual node is used as the service in another transmission direction.
  • the first node is used as the last node of the service in one transmission direction.
  • S409 Establish a connection between the selected service units on the intersecting node F.
  • the protected transmitting unit of the line branch unit 1 on the intersecting node F is connected to the line branch unit 5 through the first virtual node. Commercian unit.
  • the protected receiving unit of the line branch unit 1 is connected to the transmitting service unit of the line branch unit 5 through the second virtual node. The same is true for other nodes, and will not be described here.
  • the connection state diagram shown in FIG. 5 is obtained.
  • the line branch unit 1 in FIG. 5 is used as a protected unit, and the protected unit and the protected unit are simultaneously integrated.
  • Line branch unit 5 As a working unit, it is used for the service transmission and reception of the intersecting node F to the transmission direction of the A node, and the transmitting service unit and the receiving service unit of the transmission direction are integrated thereon.
  • the line branch unit 6 serves as a protection unit for the service transmission and reception of the intersection node F to the E node transmission direction, and the transmission protection unit and the protection unit of the node F to the node E transmission direction are integrated thereon.
  • S410 Determine whether to continue to select a node, and if so, re-execute S401 and subsequent steps; otherwise, end.
  • the foregoing is a method for implementing an ODUk SNCP interaction in an ODUk SPRing and an ODUk SNCP tangential ring.
  • a method for implementing an ODUk SPRing interaction is shown in FIG. 6. The method includes:
  • S601 Select a node used by the protected service in the ODUk SPRing, and the node is switchable in the tangent ring.
  • node F is also selected in this embodiment.
  • S602 Select a protected sending unit for the node F, where the protected sending unit is used as an interface with another ring transmission service except the ODUk SPRing in the tangential ring, and is used to send the service to the tangent ring. In the other ring except the ODUk SPRing. For example, in the eight line branch service units of the F node shown in Fig. 5, the line branch unit 6 is selected as the protected transmission unit.
  • S603 Select, at the node F, a first sending work unit and a second sending work unit in two different transmission directions, and a first sending protection unit and a second sending protection unit in the two different transmission directions.
  • a first sending work unit and a second sending work unit in two different transmission directions
  • a first sending protection unit and a second sending protection unit in the two different transmission directions.
  • S604 Select a protected receiving unit for the node F.
  • the protected receiving unit can still select the line branch unit 6.
  • S605 Select, on the node F, the first receiving working unit and the second receiving working unit of the two different transmission directions, and the first receiving and protecting unit and the second receiving and protecting unit of the two different transmission directions.
  • the line branch unit 1 can still be selected as the receiving working unit
  • the line branch unit 2 and the line branch unit 3 can also be selected as Two protection units for the transmission direction. If not, then S607 is performed; otherwise, the S602 is returned to re-select the service unit on the node F. If so, the node is the intersecting node of the tangent ring, and at this time, S608 is executed; otherwise, S609 is performed.
  • the virtual nodes are respectively used in two directions of service transmission on the node, that is, one virtual node is used as the last node of the service in one transmission direction, and the other virtual node is used as the service in another transmission direction.
  • the first node is used as the last node of the service in one transmission direction.
  • the line branch unit 6 in Fig. 5 is used as a protected unit, on which both the protected unit and the protected unit are integrated.
  • the line branch unit 1 is used as a working unit for the service transmission and reception of the intersection node F to the transmission direction of the G node, and the transmission working unit and the receiving work unit of the transmission direction are integrated thereon.
  • the line branch unit 2 is used as a protection unit for the service transmission and reception of the intersection node F to the transmission direction of the G node, and the transmission protection unit and the protection unit of the node F to the transmission direction of the node G are integrated thereon.
  • the line branch unit 3 is used as a protection unit for the service transmission and reception of the intersection node F to the K node in the transmission direction, and the transmission protection unit and the protection unit of the node F to the node K transmission direction are integrated thereon.
  • S610 Determine whether to continue to select a node, and if so, re-execute S601 and subsequent steps; otherwise, end.
  • the inter-node connection mode shown in FIG. 5 can be obtained, when the transmission link from the node A to the intersecting node F in the ODUk SNCP of the tangent ring fails. Then, the intersecting node F in the ODUk SNCP can be switched on the basis of FIG. 5, so that the service on the faulty link can be switched to other paths for transmission to the intersecting node F.
  • the switching method of the intersecting node F is:
  • the service on the fault path is no longer received by the receiving service unit of the line tributary unit 5 on the relevant node F in the ODUk SNCP, but instead is replaced by the receiving protection unit of the line tributary unit 6 on the node F.
  • the receiving unit of the road unit 5 receives it. In this way, the transmission direction of the service is from the original From node A directly to intersecting node F, change from node A path node BCDE to intersecting node F.
  • connection state of the service unit on the intersecting node F after the switching is as shown in FIG. 7.
  • the ODUk SNCP since the ODUk SNCP only changes the cross-connection relationship between the line branch unit 5, the line branch unit 6, and the virtual point, The cross-connection relationship between the line branch unit 5, the line branch unit 6, and the protected unit 1 is not changed as in the prior art.
  • the cross-connection relationship between the virtual point and the line branch unit 1 to the line branch unit 3 used by the ODUk SPRing is unchanged. Therefore, it is easy to see from the interaction diagram of the intersecting node F on the switched tangent ring shown in FIG.
  • the inter-node connection mode shown in FIG. 5 can be obtained by the above-described interaction method of the tangent ring shown in FIG. 4 and FIG. 6, when the transmission link from the node G to the intersecting node F occurs in the ODUk SPRing of the tangent ring.
  • the intersecting node F in the ODUk SPRing can be switched on the basis of FIG. 5, so that the service on the faulty link can be switched to other paths for transmission to the intersecting node F.
  • the switching method of the intersecting node F is:
  • the service on the fault path is no longer received by the receiving service unit of the line tributary unit 1 on the relevant node F in the ODUk SPRing, but instead the receiving line unit of the line tributary unit 3 on the node F replaces the line branch.
  • the receiving unit of the road unit 1 receives it.
  • the transmission direction of the service is changed from the original slave node G directly to the intersecting node F, and is changed from the node G path node HIJK to the intersecting node F.
  • connection state of the service unit on the intersecting node F after the switching is as shown in FIG. 9.
  • the above embodiment only changes the cross connection between the line branch unit 1 to the line branch unit 3 and the virtual point used by the ODUk SPRing.
  • the relationship rather than changing the cross-connect relationship of the line branch unit 1 to the line branch unit 3 and the protected unit 6, as in the prior art.
  • the cross-connection relationship between the virtual point and the line branch unit 5 and the line branch unit 6 used by the ODUk SNCP is unchanged. Therefore, it is easy to see from the interaction diagram of the intersecting nodes F on the switched tangent ring shown in FIG. 8(b).
  • the ODUk SPRing When the ODUk SPRing is switched in the tangent ring of the present invention, only the cross-connection relationship of the line branch unit used by the ODUk SPRing needs to be changed, and the state of the ODUk SNCP is not required to be used by the APS protocol, and the ODUk SNCP is on the intersecting node F.
  • the interaction mode does not change, so the coupling relationship of different protections can be reduced, the complexity of processing can be reduced, and the switching time can be accelerated, and the reliability of protection can be improved.
  • the switching may be performed according to the switching methods of the ODUk SNCP and the ODUk SPRing, and the connection state of the service unit on the intersecting node F after the switching is as shown in FIG.
  • Figure 8 (c) is an interaction diagram of the intersecting node F after the tangential ring switching. Since the two rings in the tangential ring need to be switched when the link fault occurs, the method only needs to be performed according to the single ring switching method. After the switchover, the interaction state is also the sum of the interaction states after the single ring switchover. Therefore, when the switchover needs to be performed in the tangent ring, the faulty ring only needs to be switched according to its own interaction mode without considering the state of the other ring. It can reduce the coupling relationship of different protections, reduce the complexity of processing, speed up the switching time, and improve the reliability of protection.
  • the embodiment of the present invention further discloses an apparatus for implementing ODUk SPRing tangent ring interaction.
  • the apparatus establishes the tangent ring for the intersecting node for the intersecting nodes common to the two rings.
  • two virtual nodes are also established on the intersecting node, and the service units are cross-connected with the virtual node, so that in the switching, the APS protocol can be used to query the tangent ring.
  • the state of the other loop can be directly switched in a single mode.
  • FIG. 11 a schematic block diagram of an apparatus for implementing interaction of an ODUk SPRing tangent ring is provided.
  • the apparatus includes: a selecting unit 1101, a virtual node establishing unit 1102, and a connecting unit 1103, where
  • the selecting unit 1101 is configured to select a node used by a node used by the ODUk SPRing tangent ring to be protected by the service, and a receiving and transmitting service unit and a protected receiving and transmitting unit on the node; wherein the node is It can be reversed in the tangent ring.
  • Any node in the ODUk SPRing may be selected; for the ODUk SNCP in the tangent ring, the source node or the sink node through which the protected service transmission in the ODUk SNCP is selected may be selected. Intersect nodes for use by two of the tangent rings are also included in the selected node.
  • the selecting unit 1101 may select, on the intersecting node, the sending service unit (i.e., the protected transmitting unit) used by the protected service, and the sending working unit and the sending protection unit. For example, a first transmit unit and a second transmit unit in two different transmission directions, and a first transmit protection unit and a second transmit protection unit in the two different transmission directions may be selected;
  • the receiving service unit ie, the protected receiving unit used by the protected service in the ODUk SPRing is selected on the node, and the working unit and the receiving and protecting unit are received.
  • the first receiving working unit and the second receiving working unit of the two different transmission directions, and the first receiving protection unit and the second receiving and protecting unit of the two different transmission directions may be selected.
  • the selecting unit 1101 may select, on the intersecting node, a protection unit that is different from the transmission direction of the sending unit; and a same transmission direction as the sending unit The working unit and a receiving and protecting unit having the same transmission direction as the transmitting protection unit.
  • the virtual node establishing unit 1102 is configured to: when the node in the selecting unit 1101 is an intersecting node, establish two virtual nodes on the node, and send and receive service units in each of the two directions and A connection is established between the receiving and transmitting units through one of the virtual nodes.
  • the virtual nodes are respectively used in two directions of service transmission on the node, that is, one virtual node is used as the last node of the service in one transmission direction, and the other virtual node is used as the service in another transmission direction.
  • the first node is configured to: when the node in the selecting unit 1101 is an intersecting node, establish two virtual nodes on the node, and send and receive service units in each of the two directions and A connection is established between the receiving and transmitting units through one of the virtual nodes.
  • the virtual nodes are respectively used in two directions of service transmission on the node, that is, one virtual node is used as the last node of the service in one transmission direction, and the other virtual node is used as the service in another
  • the connecting unit 1103 is configured to establish a connection between the receiving service unit in the same transmission direction and the protected transmitting unit on the node, or establish a connection between the sending service unit and the protected receiving unit in the same transmission direction on the node.
  • the receiving service unit used by the protected service is respectively connected to the first sending service unit and the second sending service unit by using one virtual node;
  • the service unit used by the protected service passes through another virtual node Connected to the first receiving service unit and the second receiving service unit.
  • the receiving service unit used by the protected service is connected to the sending service unit through a virtual node; and the sending service unit used by the protected service is passed through another virtual node. Connected to the receiving business unit.
  • FIG. 12 is a schematic block diagram showing the structure of another apparatus embodiment of the present invention.
  • the device When the link fault occurs in the shared guard ring ODUk SPRing in the tangential ring, the device further includes:
  • the first switching unit 1201 is configured to switch, according to a result of the connection of the intersecting node by the connecting unit 1103, a cross connection between a service unit used by the ODUk SPRing on the intersecting node and the virtual node. For example, in the foregoing method embodiment, when the transmission link from the node G to the intersecting node F in the ODUk SPRing of the tangent ring fails, the ODUk SPRing is switched on the basis of FIG. 5, and is no longer Narration.
  • FIG. 12 is a schematic block diagram showing the structure of another apparatus embodiment of the present invention.
  • the device When the link fault occurs in the shared guard ring ODUk SNCP in the tangential ring, the device further includes:
  • the second switching unit 1301 is configured to switch, according to a result of the connection unit to the intersecting node connection, a cross connection between the service unit used by the ODUk SNCP on the intersecting node and the virtual node. For example, in the foregoing method embodiment, when the transmission link from the node A to the intersecting node F in the ODUk SNCP of the tangent ring fails, the ODUk SNCP is switched on the basis of FIG. 5, and is no longer Narration.
  • the connecting unit 1103 establishes a connection between the service units on the intersecting node through the virtual node.
  • the switching unit considers the state of the non-faulty ring, thereby reducing the coupling relationship of different protections and reducing the complexity of the processing. Faster switching time increases the reliability of protection.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

Description

实现光信道数据单元保护相切环交互的方法和装置
本申请要求于 2008 年 6 月 27 日提交中国专利局、 申请号为 200810127545.3、 发明名称为"实现光信道数据单元保护相切环交互的方法和 装置"的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及光通信技术领域,尤其涉及一种实现光信道数据单元( ODUk ) 保护相切环交互的方法和装置。
背景技术
为了实现跨越两个或多个环网的端到端的业务保护通常采用光信道数据 单元保护相切环来交互业务。 目前, 常用的一种光信道数据单元保护相切环是 光信道数据单元共享保护环 (ODUk SPRing )相切环, 其组网方式是 ODUk SPRing与 ODUk SPRing组成的相切环,或者是 ODUk SPRing和 ODUk SNCP (光信道数据单元子网连接保护环)组成的相切环。 如图 1所示, 为现有技术 ODUk SPRing与 ODUk SPRing的相切环的组网示意图, 该图中由第一 ODUk SPRing 和第二 ODUk SPRing 组成一个相切环, 在该相切环中两个 ODUk SPRing都共用一个节点(以下筒称为相交节点), 即图 1中的 F节点。 其中所 述第一 ODUk SPRing由 F、 G、 H、 I、 J、 K节点组成, 所述第二 ODUk SPRing 由 A、 B、 C、 D、 E、 F节点组成。 每个 ODUk SPRing中的各节点在发方向都 有两个工作单元(以下筒称"发工作单元")和两个保护单元(以下筒称"发保 护单元"), 其中发工作单元为正常发送信号的通道, 发保护单元为当发工作单 元发生故障时, 接替发工作单元来发送信号的通道。 同样, 在收方向, 各节点 也都有两个用于接收信号的收工作单元和两个收保护单元。
当有一条从 G节点通过 F节点到 A节点业务 1和一条从 A节点通过 F节 点到 G节点的业务 2, 则现有技术中 ODUk SPRing相切环的交互方法如图 1 所示,业务 1从 G节点的发工作单元发往 F节点收工作单元,然后再由所述 F 节点的发工作单元发送给 A节点的收工作单元。 业务 2同理。
通常, 若相切环的第二 ODUk SPRing中 A节点由发工作单元发往 F节点 的传输发生故障, 则第二 ODUk SPRing需要对业务传输进行倒换, 即 A节点 将断路上的业务切换到 A节点上另一个发方向的发保护单元, 然后由该发保 护单元发送给所述 F节点, 然后再通过所述 F节点的发工作单元传输到第一 ODUk SPRing中。 同时, 倒换后, F节点上发往第二 ODUk SPRing的业务 1 除了可按照原来的路径通过 F节点发送给 A节点, 还可以由 F节点的另一个 发方向的保护单元发送给 E节点, 然后从 E节点发送给 A节点。 倒换后的状 态如图 1 (a)所示。 同理, 如果第一 ODUk SPRing中 G节点发往 F节点的传输 发生故障时, 倒换后的状态如图 1(c)所示。 而如果第一 ODUk SPRing中 G节 点发往 F节点的传输, 和第二 ODUk SPRing中 A节点发往 F节点的传输都发 生故障时, 则倒换后的状态如图 1 ( b)所示。
可见对于相切环, 由于当相切环中的一个环发生断路时, 可以根据另一环 的状态出现上述两种不同的倒换状态, 例如, 当第二 ODUk SPRing中节点 A 到节点 F之间发生故障时, 可以有图 1(a)和图 1 ( b)所示的两种倒换状态。 对 于第一 ODUk SPRing当节点 G到节点 F之间发生故障时, 则可以有图 1 (b)和 图 1 ( c)所示的两种倒换状态。 由于现有技术中当相切的其中一环发生断路时, 需要先通过 APS协议交互获取另一环的状态, 即获知另一环是否也发生故障, 然后再根据另一环的状态选择相应的倒换方法。 因此,在进行本发明创造过程 中, 发明人发现现有技术中至少存在如下问题:
由于相切环网中的第一 ODUk SPRing在倒换时, 都要先使用 APS协议交 互当得知第二 ODUk SPRing的状态后才能确定倒换的方法, 而通过 APS协议 是无法实时得到第二 ODUk SPRing的状态,因为第二 ODUk SPRing的状态是 需要该环上所有节点都使用 APS协议交互后才能确定的, 而这段时间有可能 会很长, 使得倒换时间很长而使第一 ODUk SPRing无法接受。 如果不等得到 第二个 ODUk SPRing的 APS协议交互后的状态,就决定第一个 ODUk SPRing 的倒换, 就需要假定第二个环的倒换状态,根据这个假定来对第一个环进行倒 换。而等到真正确定了第二个环的倒换状态后,有可能与前面假定的状态不同, 因此会发生多次倒换。 这会导致倒换出错因而无法正常实现相切环之间的交 互。 对于 ODUk SPRing和 ODUk SNCP组成的相切环也存在相同的问题。 发明内容
本发明实施例的目的在于提供一种实现 ODUk保护相切环交互的方法和 装置, 能够当 ODUk保护相切环中某一个链路发生故障时, 可实现被保护业 务不中断, 并且不会发生多次倒换, 不会发生倒换超时。
本发明实施例提供的一种实现光信道数据单元保护相切环交互的方法,包 括:
选择供光信道数据单元保护使用的节点以及所述节点上的收、发单元以及 被保护收、 发单元;
将所述节点上相同传输方向的收业务单元和被保护发单元建立连接,或将 所述节点上相同传输方向的发业务单元和被保护收单元建立连接;
当所述节点为相交节点时,在所述节点上建立两个虚拟节点, 并在两个方 向中每一方向上的收发业务单元以及被保护收、发单元之间通过一个所述虚拟 节点建立连接。
基于上述技术方案,本发明实施例还提供了一种实现光信道数据单元保护 相切环交互的装置, 包括:
选择单元,用于选择供光信道数据单元保护相切环使用的节点以及所述节 点上的收、 发业务单元以及被保护收、 发单元;
虚拟节点建立单元, 用于当所述节点为相交节点时,在所述节点上建立两 个虚拟节点, 并在两个方向中每一方向上的收发业务单元以及被保护收、发单 元之间通过一个所述虚拟节点建立连接;
连接单元,将所述节点上相同传输方向的收业务单元和被保护发单元建立 连接, 或将所述节点上相同传输方向的发业务单元和被保护收单元建立连接。
与现有技术相比, 本发明实施例具有以下优点:
本发明实施例通过在相切环的相交节点上设置了两个虚拟节点,将相交节 点上的业务单元建立经由所述虚拟的接连。这样, 当相切环的传输出现故障而 需要在相交节点上倒换时,只需改变相交节点上故障环所使用的业务单元与虚 无需改变, 因此无需使用 APS协议询问非故障环的状态, 可见本发明技术方 案在相切环的倒换过程中,能够减少不同保护的耦合关系,降低处理的复杂度, 加快了倒换时间, 实现被保护业务不中断, 提高了保护的可靠性。
附图说明
图 1为现有技术 ODUk SPRing与 ODUk SPRing相切环的组网示意图; 图 l(a)、 (b)、 (c)分别为图 1所示相切环倒换后的交互状态示意图; 图 2为本发明实现 ODUk SPRing相切环交互的方法实施例的流程框图; 图 3为现有技术 ODUk SPRing与 ODUk SNCP相切环的组网示意图; 图 4为本发明实现相切环中 ODUk SNCP交互的方法实施例的流程框图; 图 5为本发明图 4和图 6方法得到的相交节点上的连接状态示意图; 图 6为本发明实现相切环中 ODUk SPRing交互的方法实施例的流程框图; 图 7为本发明 ODUk SNCP倒换后相交节点上的连接状态示意图; 图 8 ( a )为本发明 ODUk SNCP倒换后相交节点在组网中的交互示意图; 图 8 ( b )为本发明 ODUk SPRing倒换后相交节点在组网中的交互示意图; 图 8 ( c )为本发明 ODUk SNCP和 ODUk SPRing都倒换后相交节点在组 网中的交互示意图;
图 9为本发明 ODUk SPRing倒换后相交节点上的连接状态示意图; 图 10为本发明 ODUk SNCP和 ODUk SPRing都倒换后相交节点上的连接 状态示意图;
图 11为本发明一种实现 ODUk SPRing相切环交互的装置示意框图; 图 12为本发明另一种实现 ODUk SPRing相切环交互的装置示意框图; 图 13为本发明又一种实现 ODUk SPRing相切环交互的装置示意框图。 具体实施方式
下面结合附图对本发明实施例的具体实施方式做进一步的详细阐述。
本发明公开的一种 ODUk保护相切环的交互方法是, 对于相切的两个环 公用的相交节点, 在该节点上建立虚拟点, 以及基于所述虚拟点的交叉连接, 这样, 能够在倒换时, 无需使用 APS协议查询另一个环的状态而可直接进行 单一模式的倒换。 如图 2所示, 为本发明一种 ODUk SPRing相切环的交互方 法实施例的流程框图, 该方法应用在 ODUk SPRing中包括:
S201: 选择 ODUk SPRing中被保护业务所使用的节点, 该节点是在相切 环中能够倒换的,例如对于相切环中的 ODUk SPRing,可选择该 ODUk SPRing 中的任意节点; 对于相切环中的 ODUk SNCP, 可选择 ODUk SNCP中被保护 业务传输经由的源节点或宿节点。
S202: 为所述节点选择被保护业务使用的发业务单元(筒称被保护发单 元), 所述被保护发单元可以是支路单元或者是线路单元。 例如, 在 ODUk SPRing中, 除相交节点外的其他每个节点上都可有 8个业务单元, 其中可从 这 8个业务单元中选择 1个作为被保护发单元。所述被保护发单元作为本节点 到相邻节点的接口, 用于将本节点中的业务发送给相邻节点。
S203: 在所述节点上选择发工作单元和发保护单元。 例如, 对于 ODUk
SPRing要选择 4个发业务单元, 包括 2个发工作单元, 2个发保护单元, 分别 可称作第一发工作单元和第二发工作单元、以及第一发保护单元和第二发保护 单元。其中,所述第一发工作单元和第一发保护单元面向该环传输的一个方向 , 而所述第二发工作单元、 第二发保护单元面向该环传输的另一个方向。 对于 ODUk SNCP, 要选择 2个发业务单元, 即 1个发工作单元, 1个发保护单元。
S204: 为所述节点选择被保护业务所使用的收业务单元(筒称被保护收单 元)。其中,所述被保护收单元可以和 S202中选择的被保护发单元为同一个业 务单元,也可以选择其他业务单元。所述被保护收单元作为本节点到相邻节点 的接口, 用于接收来自于相邻节点的业务。。
S205: 在所述节点上选择收工作单元和收保护单元。 例如, 对于 ODUk
SPRing可选择 2个收工作单元, 2个收保护单元,分别可称作第一收工作单元 和第二收工作单元、 以及第一收保护单元和第二收保护单元。 其中, 所述第一 收工作单元和第一收保护单元面向该环传输的一个方向 ,而所述第二收工作单 元、 第二收保护单元面向该环传输的另一个方向。 对于 ODUk SNCP, 要选择 1个收工作单元, 1个收保护单元。
其中, 所述收工作单元和收保护单元可以和 S203中选择的发工作单元和 发保护单元为同一个业务单元, 也可以选择其他业务单元。 没有,则执行 S207; 否则,返回所述 S202以重新在所述节点上选择业务单元。 若是, 则该节点为相切环的相交节点, 此时执行 S208; 否则, 执行 S209。
S208: 在该节点上建立两个虚拟节点。 之后, 执行 S209。
其中, 所述虚拟节点分别用在该节点上的业务传输的两个方向上, 即一个 虚拟节点作为业务在一个传输方向上的最后一个节点,另一个虚拟节点作为该 业务在另一个传输方向上的第一个节点。
S209: 在所述节点上建立所选择的业务单元之间连接, 即将节点上相同传 输方向的收业务单元和被保护发单元建立连接,或者,相同传输方向的发业务 单元和被保护收单元建立连接。如果是相交节点, 则业务单元之间还要通过所 述虚拟节点建立连接。
S210: 判断是否还要继续选择节点, 若是, 则重新执行 S201及后续步骤; 否则, 结束。
上述实施例通过在相交节点上建立虚拟节点,并且在每个传输方向上都设 虚拟节点, 这样两个环通过虚拟节点的搭接, 能够减少不同保护的耦合关系, 即其中一个环发生倒换时, 无需再使用 APS协议获知另一个环的状态。 因此, 可以加快倒换的时间, 而且还可以提高保护的可靠性。 同时, 由于虚拟节点可 以不占用所在节点外部的交叉端口, 因此, 还可以节省交叉资源。
此外,上述实施例中 S202在节点上选择发方向的业务单元,与 S204在节 节点上选择收方向的业务单元 ,以及在所述收业务单元中选择相应的收工作单 元和收保护单元。 然后再在节点上选择发方向的业务单元, 以及在所述发业务 单元中选择相应的发工作单元和发保护单元。
上述实施例是针对 ODUk SPRing的, 此外, 对于 ODUk SNCP其方法除 了没有 S203和 S205步骤外, 其余步骤都和上述实施例相同。 在此不再赘述。
下面分别举例说明上述方法在相切环中的具体应用, 例如, 在如图 3所示 的 ODUk SPRing和 ODUk SNCP相切环中, 对于该相切环中的 ODUk SNCP, 所述方法的流程如图 4所示, 该方法包括:
S401: 在所述 ODUk SNCP中选择被保护业务所使用的节点, 该节点是在 相切环中能够倒换的, 例如选择节点 F。
S402: 为节点 F选择被保护发单元, 该节点 F上被保护发单元作为与相 切环中除所述 ODUk SNCP外的另一个环传输业务的接口,用于将业务发送给 相切环中除所述 ODUk SNCP外的另一个环中。 例如, 在图 5所示的 F节点的 8个线路支路业务单元中, 可选择线路支路单元 1作为被保护发单元。 S403: 在所述节点 F上选择发工作单元和发保护单元。 其中, 所述发工作 单元面向该环传输的一个方向,而所述发保护单元面向该环传输的另一个传输 方向。 例如, 在图 5所示的节点 F的 8个线路支路业务单元中, 可选择线路支 路单元 5为发工作单元, 线路支路单元 6为发保护单元。
S404: 为所述节点 F选择被保护收单元。 例如, 在本实施例中, 被保护发 单元可依然选择线路支路单元 1。
S405:在所述节点 F上选择一个与所述发工作单元传输方向相同的收工作 单元, 和一个与所述发保护单元传输方向相同的收保护单元。 例如, 在图 5 所示的节点 F的 8个线路支路业务单元中,可依然选择线路支路单元 5为收工 作单元, 线路支路单元 6为收保护单元。 没有, 则执行 S407; 否则, 返回所述 S402以重新在所述节点 F上选择业务单 元。 使用,若是,则该节点为相切环的相交节点,此时执行 S408;否则,执行 S409。
S408: 在本实施例中, 由于节点 F为相交节点, 因此在所述相交节点 F 上建立两个虚拟节点。 之后, 执行 S409。
其中, 所述虚拟节点分别用在该节点上的业务传输的两个方向上, 即一个 虚拟节点作为业务在一个传输方向上的最后一个节点,另一个虚拟节点作为该 业务在另一个传输方向上的第一个节点。
S409: 在所述相交节点 F上建立所选择的各业务单元之间的连接。 例如, 同时结合图 3所示, 对于相交节点 F到节点 A的传输方向, 将相交节点 F上 的线路支路单元 1 的被保护发单元通过第一虚拟节点连接到线路支路单元 5 的收业务单元。 同理,将线路支路单元 1的被保护收单元通过第二虚拟节点连 接到线路支路单元 5的发业务单元。其他节点的连接方式也如此,在此不再赘 述。
当相交节点 F上所选择的各业务单元之间都建立好连接后,得到图 5所示 的连接状态示意图。根据上述方法实施例可知, 图 5中的线路支路单元 1作为 被保护单元, 其上同时集成了被保护发单元和被保护收单元。 线路支路单元 5 作为工作单元, 用于相交节点 F向 A节点传输方向的业务收发, 其上集成了 该传输方向的发业务单元和收业务单元。 线路支路单元 6作为保护单元, 用于 相交节点 F向 E节点传输方向的业务收发, 其上集成了节点 F到节点 E传输 方向的发保护单元和收保护单元。
S410: 判断是否还要继续选择节点, 若是, 则重新执行 S401及后续步骤; 否则, 结束。
上述是 ODUk SPRing和 ODUk SNCP相切环中实现 ODUk SNCP交互的 方法实施例, 对于该相切环中的 ODUk SPRing, 实现 ODUk SPRing交互的方 法流程如图 6所示, 该方法包括:
S601: 在 ODUk SPRing中选择被保护业务所使用的节点, 该节点是在相 切环中能够倒换的。 例如, 在该实施例中还选择节点 F。
S602: 为节点 F选择被保护发单元, 该节点 F上的被保护发单元作为与 相切环中除所述 ODUk SPRing外的另一个环传输业务的接口, 用于将业务发 送给相切环中除所述 ODUk SPRing外的另一个环中。 例如, 在图 5所示的 F 节点的 8个线路支路业务单元中, 选择线路支路单元 6作为被保护发单元。
S603:在所述节点 F上选择两个不同传输方向的第一发工作单元和第二发 工作单元, 以及所述两个不同传输方向的第一发保护单元和第二发保护单元。 当然,如果所述节点 F上只有一个传输方向上有业务, 则可以仅选择该业务传 输方向上的发工作单元和发保护单元。例如,在图 5所示的节点 F的 8个线路 支路业务单元中, 可选择线路支路单元 1为发工作单元,还可选择线路支路单 元 2和线路支路单元 3分别作为不同传输方向上的发保护单元。
S604: 为所述节点 F选择被保护收单元。 例如, 在本实施例中, 被保护收 单元可依然选择线路支路单元 6。
S605:在所述节点 F上选择所述两个不同传输方向的第一收工作单元和第 二收工作单元,以及所述两个不同传输方向的第一收保护单元和第二收保护单 元。 当然, 如果所述节点 F上只有一个传输方向上业务, 则可以仅选择该业务 传输方向上的收工作单元和收保护单元。 例如, 在图 5所示的相交节点 F的 8 个线路支路业务单元中, 可依然选择线路支路单元 1为收工作单元,还可选择 线路支路单元 2和线路支路单元 3分别为两个传输方向的收保护单元。 没有, 则执行 S607; 否则, 返回所述 S602以重新在所述节点 F上选择业务单 元。 使用,若是,则该节点为相切环的相交节点,此时执行 S608;否则,执行 S609。
S608: 在本实施例中, 由于节点 F为相交节点, 因此在所述相交节点 F 上建立两个虚拟节点。 之后, 执行 S609。
其中, 所述虚拟节点分别用在该节点上的业务传输的两个方向上, 即一个 虚拟节点作为业务在一个传输方向上的最后一个节点,另一个虚拟节点作为该 业务在另一个传输方向上的第一个节点。
S609:在所述相交节点 F上建立所选择的各业务单元之间的连接,得到图 5所示的连接状态示意图。 根据上述方法实施例可知, 图 5中的线路支路单元 6作为被保护单元, 其上同时集成了被保护发单元和被保护收单元。 线路支路 单元 1作为工作单元, 用于相交节点 F向 G节点传输方向的业务收发, 其上 集成了该传输方向的发工作单元和收工作单元。 线路支路单元 2作为保护单 元, 用于相交节点 F向 G节点传输方向的业务收发, 其上集成了节点 F到节 点 G传输方向的发保护单元和收保护单元。 线路支路单元 3作为保护单元, 用于相交节点 F向 K节点传输方向的业务收发, 其上集成了节点 F到节点 K 传输方向的发保护单元和收保护单元。
S610: 判断是否还要继续选择节点, 若是, 则重新执行 S601及后续步骤; 否则, 结束。
通过上述图 4和图 6所示的相切环的交互方法可得到图 5所示的节点间连 接方式, 当相切环的 ODUk SNCP中从节点 A到相交节点 F的传输链路发生 故障时, 则所述 ODUk SNCP中的相交节点 F可在图 5的基础上发生倒换,使 故障链路上的业务能够倒换到其他路径上来传输给相交节点 F。 其中, 所述相 交节点 F的倒换方法是:
故障路径上的业务不再由 ODUk SNCP中相关节点 F上的线路支路单元 5 的收业务单元来接收,而改为由该节点 F上线路支路单元 6的收保护单元代替 所述线路支路单元 5的收业务单元来接收。这样, 该业务的传输方向则由原来 的从节点 A直接到相交节点 F, 改变成从节点 A途径节点 BCDE到相交节点 F。
倒换后的相交节点 F上的业务单元的连接状态如图 7所示,上述实施例由 于 ODUk SNCP仅仅改变了线路支路单元 5、 线路支路单元 6与虚拟点之间的 交叉连接关系, 而不是像现有技术那样改变线路支路单元 5、 线路支路单元 6 与被保护单元 1的交叉连接关系。 在本实施例中虚拟点与 ODUk SPRing使用 的线路支路单元 1至线路支路单元 3的交叉连接关系都不变。 因此从图 8 ( a ) 所示的倒换后的相切环上相交节点 F的交互示意图中不难看出,本发明相切环 中当 ODUk SNCP倒换时, 只需对 ODUk SNCP所使用的线路支路单元与虚拟 节点之间的交叉连接关系进行改变, 而无需使用 APS协议询问 ODUk SPRing 的状态, ODUk SPRing在相交节点 F上的交互方式不发生改变, 因此能够减 少不同保护的耦合关系, 降低处理的复杂度, 并可以加快倒换时间, 提高保护 的可靠性。
同样,通过上述图 4和图 6所示的相切环的交互方法可得到图 5所示的节 点间连接方式, 当相切环的 ODUk SPRing中从节点 G到相交节点 F的传输链 路发生故障时, 则所述 ODUk SPRing中的相交节点 F可在图 5的基础上发生 倒换,使故障链路上的业务能够倒换到其他路径上来传输给相交节点 F。其中, 所述相交节点 F的倒换方法是:
故障路径上的业务不再由 ODUk SPRing中相关节点 F上的线路支路单元 1的收业务单元来接收, 而改为由该节点 F上线路支路单元 3的收保护单元代 替所述线路支路单元 1的收业务单元来接收。这样, 该业务的传输方向则由原 来的从节点 G直接到相交节点 F,改变成从节点 G途径节点 HIJK到相交节点 F。
倒换后的相交节点 F上的业务单元的连接状态如图 9所示,上述实施例由 于仅仅改变了 ODUk SPRing所使用的线路支路单元 1至线路支路单元 3与虚 拟点之间的交叉连接关系,而不是像现有技术那样改变线路支路单元 1至线路 支路单元 3与被保护单元 6的交叉连接关系。 在本实施例中虚拟点与 ODUk SNCP使用的线路支路单元 5和线路支路单元 6的交叉连接关系都不变。 因此 从图 8 ( b )所示的倒换后的相切环上相交节点 F的交互示意图中不难看出, 本发明相切环中当 ODUk SPRing倒换时,只需对 ODUk SPRing所使用的线路 支路单元的交叉连接关系进行改变, 而无需使用 APS协议询问 ODUk SNCP 的状态, ODUk SNCP在相交节点 F上的交互方式不发生改变, 因此能够减少 不同保护的耦合关系, 降低处理的复杂度, 并可以加快倒换时间, 提高保护的 可靠性。
同理,在图 5所示的节点间连接方式的基础上, 当相切环的 ODUk SPRing 中从节点 G到相交节点 F的传输链路, 以及该相切环的 ODUk SNCP中从节 点 A到相交节点 F的传输链路都发生故障时, 则可按照上述 ODUk SNCP和 ODUk SPRing的倒换方法分别进行倒换, 倒换后的相交节点 F上的业务单元 的连接状态如图 10所示, 即改变了如图 7所示的 ODUk SNCP使用的线路支 路单元 5、 线路支路单元 6与虚拟点之间的交叉连接关系, 同时还改变了如图 9所示的 ODUk SPRing所使用的线路支路单元 1至线路支路单元 3与虚拟点 之间的交叉连接关系。 图 8 ( c )为相切环倒换后相交节点 F的交互示意图, 由于本实施例当相切环中的两个环都发生链路故障需要倒换时,只需分别按照 单个环倒换的方法进行倒换,倒换后得到交互状态也是单个环倒换后的交互状 态之和, 因此, 当相切环中需要发生倒换时, 故障环只需按照自身的交互方式 进行倒换而无需考虑对方环的状态, 因此可以减少不同保护的耦合关系, 降低 处理的复杂度, 加快倒换时间, 提高保护的可靠性。
基于上述技术方案, 本发明实施例还公开了一种实现 ODUk SPRing相切 环交互的装置,对于相切的两个环公用的相交节点, 该装置除了为所述相交节 点建立所述相切环使用的业务单元外, 还在所述相交节点上建立两个虚拟节 点, 所述业务单元之间都与所述虚拟节点的交叉连接, 这样在倒换时, 可无需 使用 APS协议查询相切环中另一个环的状态而可能够直接进行单一模式的倒 换。 如图 11所示, 为本发明一种实现 ODUk SPRing相切环的交互的装置示意 框图,所述装置包括:选择单元 1101、虚拟节点建立单元 1102、连接单元 1103 , 其中,
所述选择单元 1101 , 用于选择供 ODUk SPRing相切环被保护业务所使用 的节点使用的节点以及所述节点上的收、 发业务单元以及被保护收、 发单元; 其中, 所述节点在相切环中都能够倒换。 例如对于相切环中的 ODUk SPRing, 可选择该 ODUk SPRing中的任意节点; 对于相切环中的 ODUk SNCP, 可选 择 ODUk SNCP中被保护业务传输经由的源节点或宿节点。在所选的节点中还 包括供相切环中的两个环使用的相交节点。
对于相切环中的 ODUk SPRing , 所述选择单元 1101可在所述相交节点上 选择被保护业务使用的发业务单元(即被保护发单元), 以及发工作单元和发 保护单元。 例如, 可选择两个不同传输方向的第一发工作单元和第二发工作单 元, 以及所述两个不同传输方向的第一发保护单元和第二发保护单元;
同时还在该节点上选择 ODUk SPRing中被保护业务所使用的收业务单元 (即被保护收单元), 以及收工作单元和收保护单元。 例如, 可选择所述两个 不同传输方向的第一收工作单元和第二收工作单元,以及所述两个不同传输方 向的第一收保护单元和第二收保护单元。
对于相切环中的 ODUk SNCP,所述选择单元 1101可在所述相交节点上选 个与所述发工作单元传输方向不同的发保护单元; 以及一个与所述发工作单元传输方向相同的收工作单元和一个与所述发保护 单元传输方向相同的收保护单元。
所述虚拟节点建立单元 1102, 用于当所述选择单元 1101中的节点为相交 节点时,在所述节点上建立两个虚拟节点, 并在两个方向中每一方向上的收发 业务单元以及被保护收、 发单元之间通过一个所述虚拟节点建立连接。 其中, 所述虚拟节点分别用在该节点上的业务传输的两个方向上,即一个虚拟节点作 为业务在一个传输方向上的最后一个节点,另一个虚拟节点作为该业务在另一 个传输方向上的第一个节点。
所述连接单元 1103 , 用于将所述节点上相同传输方向的收业务单元和被 保护发单元建立连接,或将所述节点上相同传输方向的发业务单元和被保护收 单元建立连接。
例如, 对于相切环中的共享保护环 ODUk SPRing, 将所述被保护业务所 使用的收业务单元通过一个虚拟节点分别连接到所述第一发业务单元和第二 发业务单元;将所述被保护业务所使用的发业务单元通过另一个虚拟节点分别 连接到所述第一收业务单元和第二收业务单元。
对于相切环中的 ODUk SNCP, 将所述被保护业务所使用的收业务单元通 过一个虚拟节点连接到所述发业务单元;将所述被保护业务所使用的发业务单 元通过另一个虚拟节点连接到所述收业务单元。
此外, 在上述装置实施例的基础上, 本发明还公开了另一个装置实施例, 该装置能够使相切环中的故障环只需按照自身的交互方式进行倒换而无需考 虑对方环的状态。如图 12所示, 为本发明另一个装置实施例的结构示意框图。 当所述相切环中的共享保护环 ODUk SPRing发生链路故障时, 所述装置在图 11所示实施例的基础上还包括:
第一切换单元 1201 , 用于根据所述连接单元 1103对所述相交节点连接的 结果, 切换所述相交节点上 ODUk SPRing使用的业务单元与所述虚拟节点之 间的交叉连接。 例如, 具体切换方法可参见上述方法实施例中当相切环的 ODUk SPRing中从节点 G到相交节点 F的传输链路发生故障时, ODUk SPRing 在图 5的基础上的倒换, 在此不再赘述。
此外, 在上述装置实施例的基础上, 本发明还公开了另一个装置实施例, 该装置能够使相切环中的故障环只需按照自身的交互方式进行倒换而无需考 虑对方环的状态。如图 12所示, 为本发明另一个装置实施例的结构示意框图。 当所述相切环中的共享保护环 ODUk SNCP发生链路故障时, 所述装置在图 11所示实施例的基础上还包括:
第二切换单元 1301 , 用于根据所述连接单元对所述相交节点连接的结果, 切换所述相交节点上 ODUk SNCP使用的业务单元与所述虚拟节点之间的交 叉连接。例如,具体切换方法可参见上述方法实施例中当相切环的 ODUk SNCP 中从节点 A到相交节点 F的传输链路发生故障时, ODUk SNCP在图 5的基础 上的倒换, 在此不再赘述。
上述装置实施例中由于虚拟节点建立单元 1102在相交节点上建立的两个 不同传输方向上的虚拟节点, 所述连接单元 1103将所述相交节点上业务单元 之间都通过所述虚拟节点建立连接, 这样, 当相切环中出现故障时, 切换单元 虑非故障环的状态, 因此减少了不同保护的耦合关系, 降低处理的复杂度, 加 快了倒换时间, 提高了保护的可靠性。
以上所描述的装置实施例仅仅是示意性的,其中所述作为分离部件说明的 单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也 可以不是物理单元 ,即可以位于一个地方 ,或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目 的。本领域普通技术人员在不付出创造性的劳动的情况下,即可以理解并实施。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到本发明 可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬件,但很 多情况下前者是更佳的实施方式。基于这样的理解, 本发明的技术方案本质上 或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机 软件产品可以存储在存储介质中, 如 ROM/RAM、 磁碟、 光盘等, 包括若干指 令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备等) 执行本发明各个实施例或者实施例的某些部分所述的方法。
以上所述的本发明实施方式, 并不构成对本发明保护范围的限定。任何在 本发明的精神和原则之内所作的修改、等同替换和改进等, 均应包含在本发明 的保护范围之内。

Claims

权 利 要 求
1、 一种实现光信道数据单元保护交互的方法, 其特征在于, 包括: 选择供光信道数据单元保护使用的节点以及所述节点上的收、发单元以及 被保护收、 发单元;
将所述节点上相同传输方向的收业务单元和被保护发单元建立连接,或将 所述节点上相同传输方向的发业务单元和被保护收单元建立连接;
当所述节点为相交节点时,在所述节点上建立两个虚拟节点, 并在两个方 向中每一方向上的收发业务单元以及被保护收、发单元之间通过一个所述虚拟 节点建立连接。
2、 如权利要求 1所述的相切环交互的方法, 其特征在于, 当所述相切环 中的共享保护环 ODUk SPRing发生链路故障时, 所述方法还包括:
切换所述相交节点上 ODUk SPRing使用的业务单元与所述虚拟节点之间 的交叉连接。
3、 如权利要求 1所述的相切环交互的方法, 其特征在于, 当所述相切环 中的子网连接保护环 ODUk SNCP发生链路故障时, 所述方法还包括:
切换所述相交节点上 ODUk SNCP使用的业务单元与所述虚拟节点之间 的交叉连接。
4、 如权利要求 1所述的相切环交互的方法, 其特征在于, 对于相切环中 的共享保护环 ODUk SPRing, 所述选择所述节点上的收、 发业务单元以及被 保护收、 发单元具体为:
选择 ODUk SPRing中被保护业务所使用的发业务单元, 以及两个不同传 输方向的第一发工作单元和第二发工作单元,以及所述两个不同传输方向的第 一发保护单元和第二发保护单元;
选择 ODUk SPRing中被保护业务所使用的收业务单元, 以及所述两个不 同传输方向的第一收工作单元和第二收工作单元,以及所述两个不同传输方向 的第一收保护单元和第二收保护单元。
5、 如权利要求 4所述的相切环交互的方法, 其特征在于, 所述两个方向 中每一方向上的收发业务单元以及被保护收、发单元之间通过一个所述虚拟节 点建立连接: 将所述被保护业务所使用的收业务单元通过一个虚拟节点分别连接到所 述第一收业务单元和第二收业务单元;
将所述被保护业务所使用的发业务单元通过另一个虚拟节点分别连接到 所述第一发业务单元和第二发业务单元。
6、 如权利要求 1所述的相切环交互的方法, 其特征在于, 对于相切环中 的 ODUk SNCP, 所述选择所述节点上的收、 发业务单元以及被保护收、 发单 元具体为: 元和一个与所述发工作单元传输方向不同的发保护单元; 工作单元传输方向相同的收工作单元和一个与所述发保护单元传输方向相同 的收保护单元。
7、 如权利要求 6所述的相切环交互的方法, 其特征在于, 所述两个方向 中每一方向上的收发业务单元以及被保护收、发单元之间通过一个所述虚拟节 点建立连接具体为:
将所述被保护业务所使用的收业务单元通过一个虚拟节点连接到所述发 业务单元;
将所述被保护业务所使用的发业务单元通过另一个虚拟节点连接到所述 收业务单元。
8、 如权利要求 4或 6所述的相切环交互的方法, 其特征在于, 相同传输 方向的发工作单元和收工作单元为同一个线路支路单元;
相同传输方向的发保护单元和收保护单元为同一个线路支路单元。
9、 如权利要求 1所述的相切环交互的方法, 其特征在于, 所建立的两个 虚拟节点分别用在所述相切环的两个传输方向上,其中一个虚拟节点作为一个 传输方向上的最后一个节点,其另一个虚拟节点作为另一个传输方向上的第一 个节点。
10、一种实现光信道数据单元保护相切环交互的装置,其特征在于, 包括: 选择单元,用于选择供光信道数据单元保护相切环使用的节点以及所述节 点上的收、 发业务单元以及被保护收、 发单元; 虚拟节点建立单元, 用于当所述节点为相交节点时,在所述节点上建立两 个虚拟节点, 并在两个方向中每一方向上的收发业务单元以及被保护收、发单 元之间通过一个所述虚拟节点建立连接;
连接单元,将所述节点上相同传输方向的收业务单元和被保护发单元建立 连接, 或将所述节点上相同传输方向的发业务单元和被保护收单元建立连接。
11、 如权利要求 10所述的相切环交互的装置, 其特征在于, 当所述相切 环中的共享保护环 ODUk SPRing发生链路故障时, 所述装置还包括:
第一切换单元, 用于根据所述连接单元对所述相交节点连接的结果,切换 所述相交节点上 ODUk SPRing使用的业务单元与所述虚拟节点之间的交叉连 接。
12、 如权利要求 10所述的相切环交互的装置, 其特征在于, 当所述相切 环中的 ODUk SNCP发生链路故障时, 所述装置还包括:
第二切换单元, 用于根据所述连接单元对所述相交节点连接的结果,切换 所述相交节点上 ODUk SNCP使用的业务单元与所述虚拟节点之间的交叉连 接。
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