CN1400777A - Method for making transmission of large capacity signalling message between network equipments and its equipment - Google Patents

Method for making transmission of large capacity signalling message between network equipments and its equipment Download PDF

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CN1400777A
CN1400777A CN 01124519 CN01124519A CN1400777A CN 1400777 A CN1400777 A CN 1400777A CN 01124519 CN01124519 CN 01124519 CN 01124519 A CN01124519 A CN 01124519A CN 1400777 A CN1400777 A CN 1400777A
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signaling
sctp
transmission
connection
stm
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CN1145321C (en
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黄世碧
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华为技术有限公司
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Abstract

This invention provides a method and its equipment of transmitting large volume signaling information among network equipments. The transmitting method is to add a STM sub layer on the SCTP protocol based on IE TF SCTR transmission protocol so as to set up more than one SCRT connection among network equipments and realize the managing function of load share and backup switching via STM. THE said network equipment is a distributed multi-host system structure and a more than one signaling process unit realizes the signaling transmission function below SCTP on the network equipment. Every signaling process unit is an independent host system and other host system realize STM and high layer protocol function. This method and its equipments to avoid one-point fault of signaling process unit on network equipments.

Description

在网络设备之间传输大容量信令消息的方法及其设备 In the method of transferring large amounts of signaling messages between network devices and equipment

技术领域 FIELD

本发明涉及电信和互联网领域,尤其是涉及在网络设备之间传输大容量信令消息的方法及其设备,这些信令消息包括国际电信联盟(ITU)的No.7信令,承载无关呼叫控制协议(BICC)等可能运用于IP网络上的网络设备控制信令协议。 The present invention relates to telecommunications and Internet field, particularly relates to a method and apparatus for transmitting large capacity signaling messages between network devices, these signaling messages include the International Telecommunication Union (ITU) in the No.7 signaling, Bearer Independent Call Control protocol (the BICC) and the like may be used in a network control signaling device on the IP network protocol.

随着IP网络上语音、多媒体等业务的应用,各网络设备之间也需要在IP网络上相互传输控制信令,如BICC、SIP、H.248协议等。 With Voice over IP network, multimedia services application, between the network device on an IP network also needs mutual transmission of control signaling, such as BICC, SIP, H.248 protocol. 由于SCTP是针对信令传输需求进行设计,具有不少适于传输控制信令的特性,因此可以应用SCTP来传输这些应用于IP网络上的新型控制信令。 Since SCTP is designed for signaling requirements, many having characteristics adapted to transmit the control signaling, SCTP can be applied to the transmission of this new network applied to IP control signaling.

现有的信令传输协议栈给出了两个主机之间传输信令的协议栈结构,保证两个主机之间信令的可靠传输。 Existing signaling transport protocol stack for transmitting signaling between two given host protocol stack structure, to ensure reliable transmission of signaling between two hosts. 但是电信设备上仅有一个主机的系统结构是无法满足可靠性要求的,当唯一的这个主机发生故障之后就会导致信令传输的中断,而且在大容量的电信网络中,两个网络设备之间的控制信令流量可能比较大,单个主机无法满足高带宽的信令处理要求。 However, only a telecommunication device on the host system configuration is unable to meet the reliability requirements, the host only when the failure of signaling transmission interruption will result, but also large-capacity telecommunications network, the two network devices signaling traffic between the control may be relatively large, a single host can not meet the requirements of high-bandwidth signaling processing.

本发明的目的是这样实现的,一种在网络设备之间进行大容量信令传输的方法,所述传输方法是以IETF的SCTP传输协议为基础,在所述SCTP协议之上增加一个信令传输管理(STM)子层,用以实现对底层SCTP信令连接的管理,所述STM支持一对信令实体之间的多条SCTP连接,所述STM之上是所要传输的高层信令消息;所述信令传输方法包括以下步骤:(1)所述STM根据网络设备上的配置信息发控制命令,在网络设备之间建立多于一条的SCTP连接;(2)所述STM根据所传输的信令消息中的负荷分担信息或高层协议给出的分担指示信息将传输负荷分配到多于一条的SCTP连接上进行传输; Object of the present invention is implemented, a method of large-capacity signaling between network equipment, the transmission method is based on the IETF SCTP transport protocol is based on the increase in a signaling protocol SCTP transmission management (STM) sublayer, to manage the underlying SCTP signaling connection, the SCTP STM support multiple connections between a signaling entity pair is a high level over the STM signaling message to be transmitted ; signaling transmission method comprising the steps of: (1) the STM commands the retransmission control according to the configuration information on the network equipment, the establishment of more than one SCTP connection between network devices; the transmission (2) according to the STM signaling message or high load sharing information sharing protocols given traffic load indication information assigned to the transmission of the SCTP connection of more than one;

(3)所述STM对各个SCTP连接的状态进行监测,如果发现某条SCTP连接有故障,则根据网络设备上的配置信息将有故障的SCTP连接所承担的业务切换到其备份SCTP连接上进行传输。 (3) the state of each STM SCTP connection monitoring, the event that a faulty article SCTP connection, depending on the configuration information of the network devices on the SCTP connection failures assumed traffic switched to its backup SCTP connection transmission.

本发明还提供可以实现本发明方法的网络设备,所述网络设备是分布式多主机系统结构;在所述网络设备上,由多于一个的信令处理单元来实现SCTP以下的信令传输功能,每个信令处理单元为独立的主机系统,由信令处理单元以外的其他主机系统来实现STM以及高层协议功能。 The present invention also provides a method of the present invention may be implemented in a network device, the network device is a distributed multi-master system architecture; on the network device, by more than one signaling processing unit to implement the SCTP signaling transmission function , each signaling processing unit is a separate host system, the host system other than the signaling processing unit to implement high-level protocol functions and STM.

实施本发明的在网络设备之间进行大容量信令传输的方法及其设备,在一对信令端点之间引入多条SCTP信令连接,便于网络设备上引入多个独立信令处理单元,可以方便支持大容量的信令流量,同时多个独立信令处理单元可以相互备份增加了网络设备上信令处理的可靠性,避免了信令传输在网络设备上的单点故障。 Large-capacity signaling between network devices of the present method and apparatus according to the invention, between a pair of the plurality of signaling points introduced SCTP signaling connection, to facilitate the introduction of a plurality of individual processing units on the network signaling device, signaling traffic can easily support a large capacity, while multiple independent signaling processing unit may increase the reliability of each backup signaling processing devices on the network, avoiding the single point of failure in signaling devices on the network.

如图2所示,在网络设备之间传输信令消息是以SCTP协议为基础,并且在SCTP协议之上增加一个信令传输管理子层,用以实现对底层SCTP信令连接的管理。 As shown, the transmission of signaling messages between network devices is based SCTP protocol 2, and add a signaling transport sublayer over SCTP protocol to manage the underlying SCTP signaling connection. STM之上是所要传输的高层信令消息,可以是IETF信令传输小组所制定的SCN信令适配层如M3UA等,也可以是支持BICC的信令传输转换层(STC)或H.248等协议。 STM is a rise above the signaling message to be transmitted, IETF signaling may be formulated by group SCN signaling adaptation layer M3UA as the like, it may be supported BICC signaling transport conversion layer (STC) or H.248 and other agreements. STM协议功能也可以在信令适配层或STC中实现,这样可以避免单独设置一层STM来完成多条SCTP信令链路的管理功能,减少协议层次接口。 STM protocol functions may also be implemented in STC or adaptation layer signaling, a separate layer is provided to avoid a plurality of STM accomplished SCTP signaling link management function, reduced levels of the protocol interface. STM以及高层协议功能是由信令处理单元以外的其他主机系统来实现的。 STM and higher layer protocol functions are provided by the host system other than the signaling processing unit to achieve.

STM层的主要SCTP信令连接管理功能包括:1、根据定义的SCTP连接间的备份原则,当某一条SCTP连接中断之后,把这条连接上的业务切换到备份连接上。 The main STM layer SCTP signaling comprising connection management function: 1, according to the principle of the backup connections between the defined SCTP, when a an SCTP connection is interrupted, this switch is connected to the bar on the backup service connection. 对于某一条SCTP连接可以定义多条备份连接,每条备份连接定义一个备份优先级,切换时根据备份优先级顺序来选择备份链路。 For an SCTP connection can define a plurality of backup connections, each connection defining a backup backup priority, select a backup time of switching to the backup link in accordance with priority order. 2、根据定义的负荷分担原则,把一对信令实体之间的业务在多条SCTP信令连接上进行负荷分担。 2, according to a defined load sharing principle, the traffic between signaling entities share load in one pair of the plurality of SCTP signaling connection. 对于No.7信令可以延用根据SLS域进行负荷分担的方法,对于其它的信令可以根据信令消息高层某个域的信息进行分担。 The method can be extended with the No.7 signaling for load sharing according SLS field, for other signaling information may be shared signaling message according to a domain level.

STM子层支持一对信令实体之间的多条SCTP连接,而一对信令实体之间仅有一条SCTP连接是STM功能中的一个特例,所以网络设备增加STM子层之后并不妨碍与没有STM子层功能的网络设备进行协议的互通。 After STM sublayer supports multiple SCTP signaling between a pair of physical connections, but only between a pair of a signaling entity an SCTP connection function is a special case of STM, the STM network device sub-layer does not prevent the increase in the no STM sublayer interworking function of the network equipment protocol.

因此,在本发明的实施例中,信令传输方法包括以下步骤:(1)所述STM根据网络设备上的配置信息发控制命令,在网络设备之间建立多于一条的SCTP连接;(2)所述STM根据所传输的信令消息中的负荷分担信息或高层协议给出的分担指示信息将传输负荷分配到多于一条的SCTP连接上进行传输;(3)所述STM对各个SCTP连接的状态进行监测,如果发现某条SCTP连接有故障,则根据网络设备上的配置信息将有故障的SCTP连接所承担的业务切换到其备份SCTP连接上进行传输。 Thus, in the embodiment of the present invention, the signaling transmission method comprising the steps of: (1) the STM commands the retransmission control according to the configuration information on the network equipment, the establishment of more than one SCTP connection between network devices; (2 ) the STM signaling messages transmitted in accordance with information sharing or load sharing indication information given higher layer protocol traffic load allocated to more than one SCTP connection is transmitted; (3) an SCTP connection to each of the STM a state monitor, the event that a faulty article SCTP connection, depending on the configuration information of the network device faulty SCTP connection service borne by the backup switching SCTP connection to its transmission.

根据本发明的信令传输方法,在两个信令端点之间存在着多条信令路径而且信令消息在这些路径之间进行负荷分担,这样容易造成需要保序传输的高层信令消息出现失序的情况,导致高层信令无法利用这种传输机制,但庆幸的是信令协议一般是面向会话的协议,只要保证同一个会话的信令报文不出现失序的情况即可,通过选择合适的负荷分担原则可以保证同一个会话的控制信令都从两个信令端点之间的同一条路径进行传输,保证同一个会话的信令报文不会出现失序的情况,如对窄带ISUP消息根据CIC值进行负荷分担时可以保证同属于一个CIC的信令报文会从同一条信令传输路径进行传输,保证信令消息的保序传输。 The signaling method of the present invention, between the two there are a plurality of signaling points and a signaling path for load sharing signaling messages among these paths, which is likely to cause the transmission of high order need to protect signaling message the situation of disorder, resulting in higher-layer signaling can not take advantage of this transport mechanism, but fortunately signaling protocol is generally oriented protocol session, as long as the same session of the signaling message without the disorder can appear by selecting the appropriate load sharing principle can ensure the same session control signaling are transmitted from the same path between two signaling points, to ensure the same session where the signaling packets do not appear out of sequence, such as ISUP messages narrowband the CIC value when the load balancing can be guaranteed to belong to a CIC from a signaling message will be transmitted with a signaling transmission paths, preserving order to ensure the transmission of signaling messages.

图3给出了一对网络设备之间共存在四条SCTP连接以及这些连接如何分布的示意图。 Figure 3 shows the co-existence between a pair of network devices and the four SCTP connection is a schematic view of how the connection profile. 在网络设备上设置独立的信令处理单元处理SCTP信令连接,把多条信令连接分布在多个独立的信令处理单元上,由STM层集中对这些SCTP信令连接进行管理。 Provided independent signaling processing unit processing on the network device SCTP signaling connection, the signaling connection pieces distributed over a plurality of separate signaling processing unit, the focus of these STM layer SCTP signaling connection management. 同一台网络设备上的各个信令处理单元相互独立,如当信令处理单元1故障之后仅影响1号和2号SCTP连接,3号和4号SCTP连接不会受影响。 The respective processing units on the same signaling network devices independent of each other, such as when a fault signaling processing section affects only the No. 1 and No. 2 SCTP connection, No. 3 and No. 4 SCTP connection is not affected. 假设网络设备1的信令处理单元1的IP地址为IP1、信令处理单元2的IP地址为IP2,同样网络设备2的对外IP地址为IP3、IP4。 Signaling processing unit that the network device 1 is 1 IP address IP1, signaling processing unit 2 of the IP address IP2, the same IP address of the external network device 2 is IP3, IP4. 在网络设备1上STM层根据配置的数据发控制命令给信令处理单元1要求它与IP3和IP4建立1号和2号SCTP连接,用同样方式要求信令处理单元2也与IP3和IP4建立3号和4号SCTP连接。 On the STM layer 1 network device based on the data transmission control command to the configuration of the signaling processing unit to establish its claim 1 and IP3 IP4 1 and 2 the SCTP connection, in the same manner as the processing unit 2 is also required to establish signaling with IP3 and IP4 3 and 4 SCTP connection. 这样在STM信令传输管理层看来到网络设备2共存在1号到4号SCTP连接。 Thus the STM signaling device 2 to the network management common opinion exists to 4 No. 1 SCTP connection.

STM管理层可以根据定义的多条SCTP连接之间的负荷分担和备份原则进行多条SCTP信令连接的管理,负荷分担与备份的原则可以根据连接的分布等原则进行定义,下面给出一个例子:在网络设备1侧定义到网络设备2的信令业务流量在1到4号SCTP信令连接上均匀地进行负荷分担,1号SCTP连接的备份连接根据备份优先级从高到低分别为2号、3号、4号SCTP连接。 STM management SCTP signaling connection may be managed according to a plurality of backup and load sharing principles defined between a plurality of SCTP connection, the principle of load sharing and backup can be defined in accordance with the principle of distribution of connection, an example is given below : defining a network device to the network side device 2 in the signaling traffic to No. 4 1 SCTP signaling connection to share load uniformly, No. 1 backup connection according to the SCTP connection backup highest to lowest priority, respectively 2 No., No. 3, No. 4 SCTP connection. 假设高层所传输的信令为窄带No.7信令,负荷分担时使用信令消息中的SLS的低两位来进行负荷分担。 Suppose level signaling transmitted narrowband No.7 signaling, the signaling message using the lower two bits of the SLS to the load balancing share load. STM发送数据时根据所发送信令消息的SLS值,当SLS=XX00时选择1号SCTP连接进行发送,同理SLS=XX01选择2号,SLS=XX10选择3号,SLS=XX11选择4号,通过这种负荷分担方式可以把所要传输的高层协议数据均匀分布在4条SCTP连接上。 The STM data is transmitted a signaling message transmitted SLS values ​​when selecting SLS = XX00 selection number No. 1 SCTP connection transmission, empathy SLS = XX01 selection number 2, SLS = XX10 selection number 3, SLS = XX11 4, in this way the load balancing can be high-level protocol data to be transmitted evenly distributed on four connection SCTP.

STM层对多条SCTP连接的倒换功能是当某一正常工作的SCTP连接因为某种原因变为不可使用时,STM根据预先定义的连接备份优先级选择另外一条SCTP连接来传输不可用SCTP连接所承担的信令业务。 Switching functions to a plurality of STM layer SCTP connection is a normal operation when the SCTP connection for some reason becomes unavailable, the backup connection according STM predefined priority choose another SCTP connection with the transmission of the non SCTP connection borne signaling traffic. 如STM层检测到1号SCTP连接故障之后,可以根据定义的备份连接优先级优先选用2号SCTP连接来替换1号SCTP连接,承担原来1号SCTP所承担的业务,如果2号连接也有故障再依据定义的备份优先级次序选用其它SCTP连接。 The STM layer after detecting No. 1 SCTP connection failure can be connected according to a defined backup Priority selection number 2 the SCTP connection is replaced No. 1 SCTP connection, assume the original No. 1 SCTP borne traffic, if No. 2 is connected also has a fault and then backup priority order based on defined use other SCTP connection.

Claims (8)

1.一种在网络设备之间进行大容量信令传输的方法,所述传输方法是以IETF的简单控制传输协议(SCTP)为基础,其特征在于,在所述简单控制传输协议(SCTP)之上增加一个信令传输管理(STM)子层,用以实现对底层简单控制传输协议(SCTP)信令连接的管理,所述信令传输管理(STM)子层支持一对信令实体之间的多条简单控制传输协议(SCTP)连接,所述信令传输管理子层(STM)之上是所要传输的高层信令消息,所述信令传输方法包括以下步骤:(1)所述信令传输管理子层(STM)根据网络设备上的配置信息发控制命令,在网络设备之间建立多于一条的简单控制传输协议(SCTP)连接;(2)所述信令传输管理子层(STM)根据所传输的信令消息中的负荷分担信息或高层协议给出的分担指示信息将传输负荷分配到多于一条的简单控制传输协议(SCTP)连接上进行传输;(3)所述信令传输管理子层(STM) 1. A method of large-capacity signaling between network equipment, the transmission method is based on the IETF Simple Control Transport Protocol (SCTP) as the basis, characterized in that the Simple Control Transmission Protocol (SCTP) increase over a signaling transport management (STM) sub-layer, connection management signaling to achieve a simple control of the underlying transport protocols (the SCTP), the signaling manager (STM) sublayer supports one signaling entities simple plurality control transmission protocol (SCTP) connection between the signaling messages over the transport layer signaling sublayer (STM) is to be transmitted, the signaling transmission method comprising the steps of: (1) signaling sublayer (STM) transmission control commands according to the configuration information on the network equipment, the establishment of more than a simple control transmission protocol (SCTP) connection between the network device; (2) the signaling transmission sublayer sharing instruction information (STM) or a higher layer protocol information sharing signaling messages transmitted in accordance with the load in a given transmission to more than one load distribution simple control transport protocol (SCTP) connection for transmission; (3) signaling sublayer (STM) 各个简单控制传输协议(SCTP)连接的状态进行监测,如果发现某条简单控制传输协议(SCTP)连接有故障,则根据网络设备上的配置信息将有故障的简单控制传输协议(SCTP)连接所承担的业务切换到其备份的简单控制传输协议(SCTP)连接上进行传输。 Each Simple Control Transport Protocol (SCTP) connection status is monitored, the event that a strip Simple Control Transport Protocol (SCTP) connection is faulty, depending on the configuration information of the network device faulty Simple Control Transport Protocol (SCTP) connections switching the service to assume a simple control of its backup transport protocol (SCTP) connection for transmission.
2.根据权利要求1所述的信令传输的方法,其特征在于:所述步骤(2)中,所述信令消息中同一个会话的信令报文被分配到同一个简单控制传输协议(SCTP)连接中进行传输。 The signaling transmission method according to claim 1, wherein: said step (2), the signaling message in the same session signaling message is assigned to the same Simple Control Transport Protocol (SCTP) connection for transmission.
3.根据权利要求1或2所述的信令传输的方法,其特征在于:所述步骤(2)中,传输负荷平均分配到所述多条简单控制传输协议(SCTP)连接上进行传输。 The method or the signaling transmission according to claim 1, wherein: said step (2), the transmission load evenly distributed to the plurality of Simple Control Transport Protocol (SCTP) connection for transmission.
4.根据权利要求1或2所述的信令传输的方法,其特征在于:所述步骤(3)中,对有故障的简单控制传输协议(SCTP)连接的切换是按照配置信息中定义的备份优先级顺序进行的。 The signaling transmission method of claim 1 or claim 2, wherein: said step (3), the switching simple faulty control transmission protocol (SCTP) connection is defined according to the configuration information backup order of priority.
5.一种实现权利要求1所述信令传输方法的网络设备,其特征在于:所述网络设备是分布式多主机系统结构;在所述网络设备上,由多于一个的信令处理单元来实现简单控制传输协议(SCTP)以下的信令传输功能,每个信令处理单元为独立的主机系统,由信令处理单元以外的其他主机系统来实现信令传输管理子层(STM)以及高层协议功能。 The signaling transmission method for a network device 5. An implement as claimed in claim, wherein: the network device is a distributed multi-master system architecture; on the network device, by the more than one signaling processing unit simple to control transmission protocol (SCTP) or less signaling functions, each signaling processing unit is a separate host system, the host system other than the signaling processing unit to implement signaling sublayer (STM) and high-level protocol functions.
6.根据权利要求5所述的一种实现信令传输方法的网络设备,其特征在于:所述的信令处理单元为网关(SG)。 6. According to one of claim 5 implemented method of signaling network device, wherein: said processing unit is a signaling gateway (SG).
7.根据权利要求5所述的一种实现信令传输方法的网络设备,其特征在于:所述的信令处理单元为业务控制点(SCP)。 7. According to one of claim 5 implemented method of signaling network device, wherein: the signaling processing unit to a service control point (SCP).
8.根据权利要求5所述的一种实现信令传输方法的网络设备,其特征在于:所述的信令处理单元为呼叫服务器(CALL SERVER)。 8. A member according to claim 5 wherein the device for network signaling transmission method, wherein: said processing unit is a call signaling server (CALL SERVER).
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