CN114710718B - Message forwarding method and device based on extended OAM under FTTR networking - Google Patents

Abstract

The invention discloses a message forwarding method and device based on extended OAM under FTTR networking, and relates to the technical field of FTTR networking. The method comprises the following steps: performing extension setting on the existing OAM protocol to enable the existing OAM protocol to support a message subscription type and have a message identification function; when a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol; the main gateway generates an OAM message routing forwarding table according to the subscription message, wherein the table is used for recording the association relation between the subscriber and the subscribed message; when a certain sub-gateway generates a message, sending a release message to a main gateway; and the main gateway searches all subscribers needing to be forwarded according to the OAM message routing forwarding table and forwards the message. The invention not only can solve the on-demand communication problem of the sub-gateway based on OAM in FTTR networking environment, but also can lighten the forwarding amount of the main gateway to a certain extent, improve the forwarding efficiency and meet the actual application requirement.

Description

Message forwarding method and device based on extended OAM under FTTR networking

Technical Field

The invention relates to the technical field of FTTR networking, in particular to a message forwarding method and device based on extended OAM under FTTR networking.

Background

FTTR (Fiber to The Room ) is a novel coverage mode of home and SOHO office networks in gigabit era, which is a novel networking scheme for realizing full coverage of Wi-Fi6 gigabit in whole house by further deriving fiber arrangement to each room or office on the basis of FTTB (fiber to the building in ten mega era) and FTTH (fiber to the home in hundred mega era), so that each room or office can reach gigabit fiber network speed.

Currently, the FTTR Network may employ an EPON (ETHERNET PASSIVE Optical Network ) Optical fiber networking, a plurality of sub-gateways are suspended under a main gateway, and the FTTR Network is managed by using a conventional EPON OAM (Optical Network unit management control interface) management protocol. However, the OAM protocol is a master-slave protocol, only supports management between the master gateway and the sub-gateway, and does not support interaction between the sub-gateway and the sub-gateway through the OAM protocol, so that in a specific application, the existing scheme can cause a plurality of problems in message forwarding between the sub-gateways.

For example, in the linkage scenario in the internet of things scenario, when the switch under the gateway in the living room needs to perform linkage communication after the gateway in the living room is opened, as shown in fig. 1, there are the following problems:

problem 1, when a message A of a living room sub-gateway is generated, it is unclear which sub-gateways should be sent to, and the message can not be forwarded as required;

When the same message A is sent to different destinations (such as the main gateway and the guest gateway in FIG. 1), the message A needs to be repeatedly sent through the guest gateway, and the sending efficiency is low; moreover, message a is transmitted multiple times in the network, and the redundancy of information occupies bandwidth.

Therefore, how to solve the problems that the message cannot be forwarded quickly as required between a plurality of sub-gateways in FTTR networking environment, the message forwarding efficiency is low, the bandwidth occupation is large, and the like becomes a matter to be solved by the technicians in the field.

Disclosure of Invention

The invention aims to provide a message forwarding method and device based on extended OAM under FTTR networking, which at least solve one of the technical problems.

To achieve the above object, in a first aspect, an embodiment of the present invention provides a message forwarding method based on extended OAM under FTTR networking, where the method includes:

Protocol expansion flow: performing extension setting on the existing OAM protocol to enable the existing OAM protocol to support a message subscription type and have a message identification function;

Message subscription flow: when a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol; the main gateway generates an OAM message routing forwarding table according to the subscription message, wherein the OAM message routing forwarding table is used for recording the association relation between the subscriber and the subscribed message;

Message forwarding flow: when a certain sub-gateway generates a message, sending a release message to a main gateway; and the main gateway searches all subscribers needing to be forwarded according to the OAM message routing forwarding table and forwards the message.

As a preferred embodiment, the protocol extension procedure specifically includes: performing extension setting on a selection code field ext. Optcode of the existing OAM protocol to enable the value to support a message subscription type; the Payload field Payload of the existing OAM protocol is expanded and set, and a message identification field and a message content field are added, wherein the message identification field is used for identifying a certain message, and the message content field is used for storing specific content of the message.

As a preferred embodiment, the protocol extension procedure specifically includes: expanding and setting a Payload field Payload of the existing OAM protocol, and adding a message subscription type field and a message content field, wherein the message subscription type field is used for representing the type of subscription message, and the message content field is used for storing the specific content of the message; a message is identified using the string topic name of the existing OAM protocol.

As a preferred embodiment, in the message subscription flow, the OAM message routing forwarding table generated by the primary gateway includes a subscription list and a message identifier Hash table; the message identification Hash table is used for carrying out Hash operation based on the message identification to find a corresponding subscription list; the subscription list comprises a message identifier and a subscriber list; each subscriber list item includes: the physical serial number of the gateway where the subscriber is located, the authorization number of the gateway where the subscriber is located, and the physical layer logical link tag LLID for subscription messaging.

As a preferred embodiment, in the message forwarding flow, the primary gateway searches all subscribers to be forwarded according to the OAM message routing forwarding table, and forwards the message, which specifically includes the following operations:

The main gateway carries out Hash operation on the message identification of the message generated by the sub gateway according to the message identification Hash table, a corresponding subscription list is quickly searched according to an operation result, a subscriber list corresponding to the message is searched from the subscription list, and the message is forwarded to all subscribers in the subscriber list according to the information in the subscriber list.

As a preferred embodiment, the method further comprises the following operations:

In the protocol expansion flow, when the existing OAM protocol is expanded and set, the existing OAM protocol has the function of identifying a forwarding mode, wherein the forwarding mode comprises an OAM broadcast forwarding mode and an OAM unicast forwarding mode;

In the message subscription flow, a forwarding mode is designated when a certain sub-gateway sends subscription messages to a main gateway through an extended OAM protocol; after receiving the subscription message, the main gateway determines the corresponding LLID according to the forwarding mode and feeds back the LLID to the sub-gateway; in the OAM broadcast forwarding mode, the determined LLID is an OAM broadcast LLID; in the OAM unicast forwarding mode, the determined LLID is an OAM unicast LLID;

In the message forwarding flow, when the main gateway forwards the message issued by a certain sub-gateway, the message is forwarded according to the designated forwarding mode and through the determined LLID.

As a preferred embodiment, when the forwarding mode is an OAM broadcast forwarding mode, the message subscription procedure and the message forwarding procedure specifically include the following operations:

When a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol, and a forwarding mode is designated as an OAM broadcast forwarding mode; after receiving the subscription information, the main gateway generates an OAM message routing forwarding table according to the subscription information, and simultaneously determines a broadcast channel LLID of the multiplexing original EPON system as an OAM broadcast LLID and feeds back the OAM broadcast LLID to the sub-gateway; the sub-gateway adds the fed back OAM broadcast LLID into a local OAM receiving message LLID list;

when a certain sub-gateway generates a message, sending a release message to a main gateway; the main gateway searches all subscribers according to the OAM message routing forwarding table and sends the message to all subscribers through the determined OAM broadcast LLID at one time; after receiving the message, the subscriber directly discards the message which is not in the subscription range.

As a preferred embodiment, when the forwarding mode is an OAM unicast forwarding mode, the message subscription procedure and the message forwarding procedure specifically include the following operations:

When a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol, and a forwarding mode is designated as an OAM unicast forwarding mode; after receiving the subscription message, the main gateway generates an OAM message routing forwarding table according to the subscription message, and simultaneously determines a unicast LLID of a multiplexing subscription message source as an OAM unicast LLID or determines a newly allocated unicast LLID as an OAM unicast LLID and feeds back the OAM unicast LLID to the sub-gateway; the sub-gateway adds the fed back OAM unicast LLID into a local OAM receiving message LLID list according to the requirement;

When a certain sub-gateway generates a message, sending a release message to a main gateway; the main gateway searches all subscribers subscribing the message according to the OAM message routing forwarding table, and sends the message to all subscribers subscribing the message through the determined OAM unicast LLID.

As a preferred embodiment, the message forwarding flow further comprises the following operations: if the searched subscriber is not online, the main gateway caches the message until the subscriber is online and then sends the message; and delete the message after the message is successfully sent.

In a second aspect, an embodiment of the present invention further provides an extension OAM-based message forwarding apparatus under FTTR networking based on the method in the embodiment of the first aspect, where the apparatus includes a protocol extension module disposed in a main gateway/sub-gateway, a message subscription and publishing module disposed in the sub-gateway, and an OAM message routing module disposed in the main gateway;

the protocol expansion module is used for: performing extension setting on the existing OAM protocol to enable the existing OAM protocol to support a message subscription type and have a message identification function;

the message subscription and release module is used for: when the sub-gateway pays attention to a certain message, a subscription message is sent to the main gateway through an extended OAM protocol; when the sub-gateway generates a message, a published message is sent to the main gateway.

The OAM message routing module is configured to: when receiving a subscription message sent by a sub-gateway, generating an OAM message routing forwarding table according to the subscription message, wherein the OAM message routing forwarding table is used for recording the association relation between a subscriber and the subscribed message; when receiving the information issued by the sub gateway, searching all subscribers needing to be forwarded according to the OAM information route forwarding table, and forwarding the information.

The invention has the beneficial effects that:

(1) According to the invention, the existing OAM protocol is expanded to support a subscription and release mode based on the message (message identification), so that the subscription-based on-demand message forwarding can be realized in the subsequent message forwarding, the on-demand communication problem of the sub-gateway based on OAM in FTTR networking environment is effectively solved, and the message generated by the sub-gateway only needs to be sent to the relevant gateway interested in the message in a targeted manner, thereby reducing the forwarding amount of the main gateway to a certain extent, improving the forwarding efficiency and meeting the actual application requirements.

(2) In the invention, a plurality of forwarding modes, namely an OAM unicast forwarding mode and an OAM broadcast forwarding mode, are designed, and the original single-channel OAM is expanded to support multi-channel OAM, namely an OAM unicast LLID (Logical LINK IDENTIFIER, logical link label) and an OAM broadcast LLID, so that when a main gateway forwards a message, the corresponding LLID can be selected according to the forwarding mode appointed by a message subscriber to transmit the message, the forwarding mode is flexible and selectable, and in the OAM broadcast forwarding mode, not only the sub-gateway only needs to send once when issuing the message, but also the main gateway also needs to broadcast and forward once when forwarding the message, thereby avoiding repeated sending of the same message to the greatest extent, improving the sending efficiency and reducing the bandwidth occupied by redundant information.

Drawings

FIG. 1 is a schematic diagram of a prior art message forwarding scheme;

Fig. 2 is a flowchart of a message forwarding method based on extended OAM under FTTR networking in an embodiment of the present invention;

fig. 3 is a schematic format diagram of an extended OAM protocol according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of an OAM message routing forwarding table according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of an OAM unicast forwarding mode according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of an OAM broadcast forwarding mode according to an embodiment of the present invention.

Detailed Description

Aiming at the prior art, the FTTR network adopts the traditional EPON OAM protocol, and the protocol only supports the management between the main gateway and the sub-gateway and does not support the interaction between the sub-gateway and the sub-gateway through the OAM protocol, so that the problems that the message forwarding between the sub-gateways cannot be fast forwarded as required, the message forwarding efficiency is low, the bandwidth occupation is large and the like are caused when the method is applied specifically. The invention aims to provide a message forwarding method and device based on extended OAM under FTTR networking, which at least solve one of the technical problems so as to meet the actual application requirements.

The main design thought is as follows: performing extension setting on the existing OAM protocol to enable the existing OAM protocol to support a message subscription type and have a message identification function; when a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol; the main gateway generates an OAM message routing forwarding table according to the subscription message, wherein the OAM message routing forwarding table is used for recording the association relation between the subscriber and the subscribed message; when a certain sub-gateway generates a message, sending a release message to a main gateway; and the main gateway searches all subscribers needing to be forwarded according to the OAM message routing forwarding table and forwards the message.

According to the scheme, the existing OAM protocol is expanded to support a subscription and release mode based on the message (message identification), so that the subscription-based on-demand message forwarding can be realized when the message forwarding is carried out subsequently, the problem of on-demand communication of the sub-gateway based on OAM in FTTR networking environment is effectively solved, and the message generated by the sub-gateway only needs to be sent to the associated gateway interested in the message in a targeted manner, thereby reducing the forwarding amount of the main gateway to a certain extent, improving the forwarding efficiency and meeting the actual application requirements.

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the technical solutions of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

However, it should be noted that: the examples to be presented below are only a few specific examples and are not intended to limit the embodiments of the present invention to the following specific steps, values, conditions, data, sequences, etc. Those skilled in the art can, upon reading the present specification, make and use the concepts of the invention to construct further embodiments not mentioned in the specification.

Example 1

Referring to fig. 2, the embodiment provides a message forwarding method based on extended OAM under FTTR networking, which includes the following steps:

A. protocol expansion flow: the existing OAM protocol is expanded and set to support the message subscription type and has the function of identifying the message.

It can be understood that, in practical application, various manners may be used to implement extension of the existing OAM protocol, so long as the OAM protocol after extension setting can support a message subscription type and has a function of identifying a message, and this embodiment is not limited specifically. But for the convenience of implementation to those skilled in the art, the following is illustrated in only two alternative embodiments.

Example 1, as an optional implementation manner, in step a, an existing OAM protocol is extended to support a message subscription type and has a function of identifying a message, which specifically includes the following operations:

A1, referring to fig. 3, the standard field ext. Optcode (option code field) of the existing OAM protocol is extended and set, so that the value of the standard field ext. Optcode (option code field) supports the message subscription type. In practical application, the message subscription types include: subscription messages, unsubscribe messages, publish messages, subscription response messages, publish response messages, and the like.

A2, referring to fig. 3, a standard field Payload (Payload) of the existing OAM protocol is extended, and a message identification field (such as MSG IDENTIFY) and a message content field (such as Msg Payload) are added, where the message identification field is used to identify a certain message, and the message content field is used to store specific content of the message. In practical applications, as shown in fig. 3, it is also conceivable to add a message length field (e.g. Length of Msg Payload,2 bytes) to the Payload field, where the size range of the message content is not more than 1487 bytes, so as to facilitate quick acquisition of the message length information.

Example 2, as an optional implementation manner, in step a, the existing OAM protocol is extended to support a message subscription type and has a function of identifying a message, which specifically includes the following operations:

A1', carrying out extension setting on a standard field Payload of the existing OAM protocol, and adding a message subscription type field and a message content field, wherein the message subscription type field is used for representing the type of subscription message, and the message content field is used for storing the specific content of the message. Also, in practical applications, the message subscription types include: subscription messages, unsubscribe messages, publish messages, subscription response messages, publish response messages, and the like.

A2' identifies a message using the string topic name of the existing OAM protocol.

In the two alternative embodiments, considering that the length of the OAM message is limited, the message is identified by adding a message identification field (such as MSG IDENTIFY) to the standard field Payload of the existing OAM protocol, which is more flexible, efficient and convenient, so that this mode is preferable.

B. Message subscription flow: when a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol; and the main gateway generates an OAM message routing forwarding table according to the subscription message, wherein the OAM message routing forwarding table is used for recording the association relation between the subscriber and the subscribed message.

Illustratively, referring to fig. 4, as a preferred embodiment, the OAM message routing forwarding table generated by the primary gateway in step B includes: subscription list and message identification Hash table.

The message identification Hash table is mainly used for carrying out Hash operation based on the message identification (i.e. the message identification field MESSAGE IDENTIFY) to find out a corresponding subscription list so as to complete quick search of the message. The subscription list includes a message identification (i.e., message identification field MESSAGE IDENTIFY) and a subscriber list, each subscriber list item including: the physical sequence number of the gateway where the subscriber is located (e.g., SN in fig. 4), the authorization number of the gateway where the subscriber is located (e.g., ONTID in fig. 4), and the physical layer LLID of the subscription messaging (e.g., LLID in fig. 4).

C. Message forwarding flow: when a certain sub-gateway generates a message, sending a release message to a main gateway; and the main gateway searches all subscribers needing to be forwarded according to the OAM message routing forwarding table and forwards the message.

Taking the OAM message routing forwarding table shown in fig. 4 as an example, the primary gateway searches all subscribers to be forwarded according to the OAM message routing forwarding table, and forwards the message, which specifically includes the following operations:

The main gateway carries out Hash operation on the message identification of the message generated by the sub gateway according to the message identification Hash table, quickly searches a corresponding subscription list according to the operation result, searches a subscriber list corresponding to the message from the subscription list, and forwards the message to all subscribers in the subscriber list according to the information in the subscriber list (such as carrying out message transmission according to the physical layer LLID in the list). For example, taking the message identifier 669 in fig. 4 as an example, the message identifier 669 of the message generated by the sub-gateway may be subjected to Hash (669) operation according to the message identifier Hash table, and the corresponding subscription list is quickly searched according to the operation result, and the subscriber list corresponding to the message (i.e. the message identifier 669) is searched from the subscription list.

It will be appreciated that, in the above example, the subscriber subscribed to the message is taken as an example (i.e. corresponds to the OAM unicast forwarding mode in the following) to be forwarded. When all subscribers needing to be forwarded are not only subscribers subscribed to the message, but all subscribers subscribed to (i.e. corresponding to the OAM broadcast forwarding mode in the following text), the primary gateway searches all subscribers needing to be forwarded according to the OAM message routing forwarding table, and forwards the message, which specifically includes the following operations: the primary gateway searches all subscriber lists from the subscription list of the OAM message routing forwarding table, and forwards the message to all subscribers in each subscriber list according to information in the subscriber list (e.g., according to the physical layer LLID in the list for message delivery).

Further, in practical application, the method further comprises the following steps: when the sub-gateway does not pay attention to a certain message, an unsubscribed message can be sent to the main gateway through an extended OAM protocol; and the main gateway cancels the subscription relation in the current OAM message routing forwarding table according to the unsubscribed message. After that, when the message is regenerated, the primary gateway will not forward the message to the sub-gateway that has unsubscribed.

From the above, it can be seen that, in this embodiment, by expanding the existing OAM protocol, the existing OAM protocol supports a subscription publishing mode based on a message (message identifier), so that subscription-based on-demand message forwarding can be implemented when message forwarding is performed subsequently, which not only effectively solves the on-demand communication problem of the sub-gateway based on OAM in the FTTR networking environment, but also the message generated by the sub-gateway is forwarded to the associated sub-gateway interested in the message only through the main gateway, thereby reducing the forwarding amount of the main gateway to a certain extent, improving the forwarding efficiency, and meeting the actual application requirements.

Example two

The embodiment provides a message forwarding method based on extended OAM under FTTR networking, which has the same basic steps as those of the first embodiment, and is different in that, as a preferred implementation manner, in order to further solve the problems of low message forwarding efficiency, large bandwidth occupied by information redundancy and the like, the embodiment not only designs a plurality of forwarding modes (including an OAM unicast forwarding mode and an OAM broadcast forwarding mode), but also extends the OAM supporting multi-channel OAM (including an OAM unicast LLID and an OAM broadcast LLID) of the original single channel, so that when a primary gateway forwards a message, the corresponding LLID can be selected according to the forwarding mode designated by a message subscriber, thereby not only flexibly selecting the forwarding mode, but also in the OAM broadcast forwarding mode, only one time of sending the message is needed when a sub-gateway issues the message, and the primary gateway also broadcasts and forwards the message once, thereby avoiding repeated sending of the same message to the greatest extent, improving the sending efficiency and reducing the bandwidth occupied by redundant information. Specifically, the method of the present embodiment further includes the following operations:

In the protocol expansion flow, when the existing OAM protocol is expanded and set, the existing OAM protocol is further enabled to have the function of identifying the forwarding modes, wherein the forwarding modes comprise an OAM unicast forwarding mode and an OAM broadcast forwarding mode. For example, in practical application, the standard field Payload of the existing OAM protocol may be extended to have a function of identifying the forwarding mode. Specifically, referring to fig. 3, a forwarding mode field (e.g., mode in fig. 3) may be added to the Payload field of the existing OAM protocol to identify a forwarding mode.

In the message subscription flow, a certain sub-gateway designates a forwarding mode when transmitting subscription messages to a main gateway through an extended OAM protocol; after receiving the subscription message, the main gateway determines the corresponding LLID according to the forwarding mode designated by the sub-gateway and feeds back the LLID to the sub-gateway. For example, if the forwarding mode is an OAM unicast forwarding mode, determining that the LLID to be used for forwarding subsequently is an OAM unicast LLID; if the forwarding mode is an OAM broadcast forwarding mode, then the LLID for forwarding may be determined to be an OAM broadcast LLID. For example, in practical application, the primary gateway may feed back the determined LLID to the sub-gateway through a subscription response message; after receiving the subscription response message of the primary gateway, the secondary gateway may add the returned LLID to the local OAM received message LLID list as needed (it will be understood that if the returned LLID is a multiplexed LLID that is allowed to be received, no join operation may be performed), so as to be used for receiving the LLID message.

In the message forwarding flow, when the main gateway forwards the message issued by a certain sub-gateway, the main gateway forwards the message according to the designated forwarding mode and through the determined LLID.

Referring to fig. 5, as an exemplary embodiment, when the forwarding mode is an OAM broadcast forwarding mode, the message subscription procedure and the message forwarding procedure specifically include the following operations:

message subscription flow: when a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol, and a forwarding mode is designated as an OAM broadcast forwarding mode; after receiving the subscription message, the main gateway determines a broadcast channel LLID of the original EPON system (such as LLID5 of the main gateway in fig. 5) as an OAM broadcast LLID, and feeds back the determined OAM broadcast LLID to the sub-gateway through a subscription response message, and generates an OAM message routing forwarding table according to the subscription message (in actual operation, if the OAM message routing forwarding table is created, the sub-gateway may be directly added as a subscriber to the created subscription list of the OAM message routing forwarding table). It can be understood that, after receiving the subscription response message of the primary gateway, the subscribed sub-gateway adds the returned OAM broadcast LLID to the local OAM received message LLID list, so as to allow receiving the LLID message, such as LLID5 of sub-gateway 2 and LLID5 of sub-gateway N in fig. 5.

Message forwarding flow: when a certain sub-gateway generates a message (e.g. sub-gateway 1 in fig. 5 generates message a), the message is issued to the main gateway by OAM unicast LLID (e.g. LLID1 of sub-gateway 1 in fig. 5); the master gateway searches all subscribers according to the OAM message routing forwarding table, and sends the message to all subscribers through the determined OAM broadcast LLID (such as LLID5 of the master gateway in figure 5) at one time according to an OAM broadcast forwarding mode; after the subscriber receives the message (e.g., in fig. 5, the sub-gateway 2 receives the message through the LLID5 of the sub-gateway 2 added before, and the sub-gateway N receives the message through the LLID5 of the sub-gateway N added before), the message not in the subscription range is directly discarded. In practical application, after receiving the message, the subscriber can judge whether to discard the message according to a message subscription list maintained in advance locally, and the message which is not in the message subscription list can be directly discarded, so that the safety can be further ensured. In addition, it can be understood that, in the OAM broadcast forwarding mode, since the broadcast channel LLID of the original EPON system is determined to be the OAM broadcast LLID, the main gateway may broadcast to the sub-gateways (e.g., sub-gateway 1 as the message publisher in fig. 5) that are not subscribed to when performing broadcast transmission through the broadcast channel LLID of the original EPON system. However, since the unsubscribed sub-gateway does not receive the OAM broadcast LLID returned by the main gateway, it does not add the OAM broadcast LLID (e.g., LLID5 of sub-gateway 1 in fig. 5) to the local OAM received message LLID list, i.e., it defaults that it does not receive message data, and further the scheme can still meet the design and use requirements.

From the above description, in the OAM broadcast forwarding mode, the message generated by the sub-gateway only needs to be sent once in the process of publishing and transmitting, and is not repeatedly transmitted, and the primary gateway only needs to send the determined OAM broadcast LLID to all subscribers at one time during forwarding, so that the subscribers only need to discard the message not in the subscription range in order to further ensure the security and efficiency, the sending efficiency of the whole process is high, the redundant information is less, and the bandwidth occupation is reduced.

Referring to fig. 6, as an exemplary embodiment, when the forwarding mode is an OAM unicast forwarding mode, the message subscription procedure and the message forwarding procedure specifically include the following operations:

Message subscription flow: when a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol, and a forwarding mode is designated as an OAM unicast forwarding mode; after receiving the subscription message, the main gateway generates an OAM message routing forwarding table according to the subscription message (in actual operation, if the OAM message routing forwarding table is created, the sub-gateway can be directly added as a subscriber to the created subscription list of the OAM message routing forwarding table), and determines a unicast LLID multiplexing the source of the subscription message (as in fig. 6, a unicast LLID2 multiplexing the source of the subscription message for the sub-gateway 2 and a unicast LLID3 multiplexing the source of the subscription message for the sub-gateway N) as the OAM unicast LLID or determines a newly allocated unicast LLID as the OAM unicast LLID (in actual application, when distinguishing from a common unicast LLID, an independent unicast LLID channel can be newly allocated as required to avoid message congestion), and feeds back the determined OAM unicast LLID to the sub-gateway through the subscription response message. It can be appreciated that after receiving the subscription response message of the primary gateway, the subscribed sub-gateway adds the returned OAM unicast LLID to the local OAM received message LLID list as needed (i.e., no addition may be made to the unicast LLID from which the subscription message originates is multiplexed, and no addition is needed to the newly allocated unicast LLID), thereby receiving the LLID message.

Message forwarding flow: when a certain sub-gateway generates a message (e.g. sub-gateway 1 in fig. 6 generates message a), the message is issued to the main gateway by OAM unicast LLID (e.g. LLID1 of sub-gateway 1 in fig. 6); the main gateway searches all subscribers subscribing the message according to the OAM message routing forwarding table, and respectively sends the message to all subscribers subscribing the message through the determined OAM unicast LLID according to the OAM unicast forwarding mode. For example, in fig. 6, the primary gateway sends the message a to the sub-gateway 2 and the sub-gateway N through LLID2 and LLID3 of the primary gateway, respectively; sub-gateway 2 receives the message via LLID2 of sub-gateway 2 and sub-gateway N receives the message via LLID3 of sub-gateway N. In practical application, after the main gateway sends the message to the sub-gateway in the OAM unicast mode, the sub-gateway can send a release response message to the main gateway after receiving the message so as to feed back whether the message is successfully received or not.

It can be understood that in the OAM unicast forwarding mode, although the message is duplicated in multiple copies during the forwarding process of the primary gateway, the messages are sent separately; however, the message generated by the sub-gateway is only transmitted once in the process of release transmission, and repeated transmission is not needed, so that the transmission efficiency is still improved to a certain extent.

Further, as an optional implementation manner, in the message forwarding flow, when the forwarding mode is an OAM unicast forwarding mode, if the searched subscriber is not online, the primary gateway needs to cache the message until the subscriber is online and then send the message; and delete the message after the message is successfully sent. Thus, the effective forwarding of the message can be ensured, and the reliability is improved; but also can prevent the accumulation of excessive messages from generating mutual interference.

Example III

Based on the same inventive concept, the embodiment of the invention also provides a message forwarding device based on extension OAM under FTTR networking, which comprises a protocol extension module arranged on a main gateway/sub-gateway, a message subscription and release module arranged on the sub-gateway and an OAM message routing module arranged on the main gateway.

Wherein, protocol expansion module is used for: the existing OAM protocol is expanded and set to support the message subscription type and has the function of identifying the message.

A message subscription and publishing module for: when the sub-gateway pays attention to a certain message, a subscription message is sent to the main gateway through an extended OAM protocol; when the sub-gateway generates a message, a published message is sent to the main gateway.

An OAM message routing module for: when receiving a subscription message sent by a sub-gateway, generating an OAM message routing forwarding table according to the subscription message, wherein the OAM message routing forwarding table is used for recording the association relation between a subscriber and the subscribed message; when receiving the information issued by the sub gateway, searching all subscribers needing to be forwarded according to the OAM information route forwarding table, and forwarding the information.

It can be understood that by adopting the device of the embodiment, the on-demand communication problem of the sub-gateway based on OAM in FTTR networking environment can be effectively solved, and the message generated by the sub-gateway only needs to be sent to the associated sub-gateway interested in the message in a targeted way, thereby reducing the forwarding amount of the main gateway to a certain extent, improving the forwarding efficiency and meeting the actual application requirement.

It should be noted that, various modifications and embodiments of the foregoing method embodiment are equally applicable to the apparatus of this embodiment, and those skilled in the art will be aware of the implementation method of the apparatus of this embodiment through the foregoing detailed description of the method, so they will not be described in detail herein for brevity.

Note that: the particular embodiments described above are illustrative only and not restrictive, and those skilled in the art may combine and combine steps and means from the various embodiments described above separately to achieve the benefits of the present invention in accordance with the concepts of the present invention, such combined and combined embodiments also being encompassed by the present invention, such combination and combination not being described in detail herein.

The advantages, effects, etc. mentioned in the embodiments of the present invention are merely examples, and are not to be construed as necessarily limiting the various embodiments of the present invention. In addition, the foregoing specific details of the embodiments of the invention have been disclosed for purposes of illustration and understanding only, and are not intended to be limiting, since the embodiments of the invention must not be practiced with the specific details.

The block diagrams of the devices, apparatuses, devices, systems according to the embodiments of the present invention are merely illustrative examples, and are not intended to require or imply that connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used in embodiments of the present invention refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used in embodiments of the present invention refers to, and is used interchangeably with, the phrase "such as, but not limited to.

The step flow diagrams in the embodiments of the invention and the method descriptions above are merely illustrative examples and are not intended to require or imply that the steps of the various embodiments must be performed in the order presented. The order of steps in the above embodiments may be performed in any order, as will be appreciated by those skilled in the art. Words such as "thereafter," "then," "next," and the like are not intended to limit the order of the steps; these words are simply used to guide the reader through the description of these methods. Furthermore, any reference to an element in the singular, for example, using the articles "a," "an," or "the," is not to be construed as limiting the element to the singular.

In addition, the steps and means in the various embodiments of the present invention are not limited to practice in a certain embodiment, and indeed, the relevant partial steps and partial means in the various embodiments herein may be combined according to the concept of the present invention to contemplate new embodiments, which are also included in the scope of the present invention.

The operations of embodiments of the present invention may be performed by any suitable means capable of performing the corresponding functions. The means may include various hardware and/or software components and/or modules including, but not limited to, circuitry or a processor of the hardware.

The method of an embodiment of the invention includes one or more acts for implementing the method described above. The methods and/or acts may be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order of acts is specified, the order and/or use of specific acts may be modified without departing from the scope of the claims.

The functions of the embodiments of the present invention may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored as one or more instructions on a tangible computer-readable medium. A storage media may be any available tangible media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other tangible medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. As used herein, discs (disks) and disks include Compact Disks (CDs), laser disks, optical disks, DVDs (DIGITAL VERSATILE DISC, digital versatile disks), floppy disks, and blu-ray disks where disks reproduce data magnetically, while disks reproduce data optically with lasers.

Thus, the computer program product may perform the operations presented herein. For example, such a computer program product may be a computer-readable tangible medium having instructions tangibly stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein. The computer program product may comprise packaged material.

Other examples and implementations are within the scope and spirit of embodiments of the invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired or any combination of these. Features that implement the functions may also be physically located at various locations including being distributed such that portions of the functions are implemented at different physical locations.

Various changes, substitutions, and alterations to the techniques described herein may be made by those skilled in the art without departing from the teachings as defined by the appended claims. Furthermore, the scope of the claims of the present disclosure is not limited to the particular aspects of the process, machine, manufacture, composition of matter, means, methods and acts described above. The processes, machines, manufacture, compositions of matter, means, methods, or acts, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or acts.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the invention to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof. And what is not described in detail in this specification is prior art known to those skilled in the art.

Claims (10)

1. An extended OAM-based message forwarding method under FTTR networking, the method is characterized in that the method includes:

Protocol expansion flow: performing extension setting on the existing OAM protocol to enable the existing OAM protocol to support a message subscription type and have a message identification function;

Message subscription flow: when a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol; the main gateway generates an OAM message routing forwarding table according to the subscription message, wherein the OAM message routing forwarding table is used for recording the association relation between the subscriber and the subscribed message;

Message forwarding flow: when a certain sub-gateway generates a message, sending a release message to a main gateway; and the main gateway searches all subscribers needing to be forwarded according to the OAM message routing forwarding table and forwards the message.

2. The message forwarding method based on extended OAM under FTTR networking as recited in claim 1, wherein the protocol extension procedure specifically includes:

performing extension setting on a selection code field ext. Optcode of the existing OAM protocol to enable the value to support a message subscription type;

The Payload field Payload of the existing OAM protocol is expanded and set, and a message identification field and a message content field are added, wherein the message identification field is used for identifying a certain message, and the message content field is used for storing specific content of the message.

3. The message forwarding method based on extended OAM under FTTR networking as recited in claim 1, wherein the protocol extension procedure specifically includes:

Expanding and setting a Payload field Payload of the existing OAM protocol, and adding a message subscription type field and a message content field, wherein the message subscription type field is used for representing the type of subscription message, and the message content field is used for storing the specific content of the message;

a message is identified using the string topic name of the existing OAM protocol.

4. The message forwarding method based on extended OAM under FTTR networking as recited in claim 1, wherein: in the message subscription flow, an OAM message routing forwarding table generated by a main gateway comprises a subscription list and a message identification Hash table;

the message identification Hash table is used for carrying out Hash operation based on the message identification to find a corresponding subscription list;

The subscription list comprises a message identifier and a subscriber list; each subscriber list item includes: the physical serial number of the gateway where the subscriber is located, the authorization number of the gateway where the subscriber is located, and the physical layer logical link tag LLID for subscription messaging.

5. The message forwarding method based on extended OAM under FTTR networking according to claim 4, wherein in the message forwarding flow, the primary gateway searches all subscribers to be forwarded according to the OAM message routing forwarding table, and forwards the message, specifically comprising the following operations:

The main gateway carries out Hash operation on the message identification of the message generated by the sub gateway according to the message identification Hash table, a corresponding subscription list is quickly searched according to an operation result, a subscriber list corresponding to the message is searched from the subscription list, and the message is forwarded to all subscribers in the subscriber list according to the information in the subscriber list.

6. The method for forwarding an extended OAM based message under a FTTR networking as recited in claim 4, further comprising the operations of:

In the protocol expansion flow, when the existing OAM protocol is expanded and set, the existing OAM protocol has the function of identifying a forwarding mode, wherein the forwarding mode comprises an OAM broadcast forwarding mode and an OAM unicast forwarding mode;

In the message subscription flow, a forwarding mode is designated when a certain sub-gateway sends subscription messages to a main gateway through an extended OAM protocol; after receiving the subscription message, the main gateway determines the corresponding LLID according to the forwarding mode and feeds back the LLID to the sub-gateway; in the OAM broadcast forwarding mode, the determined LLID is an OAM broadcast LLID; in the OAM unicast forwarding mode, the determined LLID is an OAM unicast LLID;

In the message forwarding flow, when the main gateway forwards the message issued by a certain sub-gateway, the message is forwarded according to the designated forwarding mode and through the determined LLID.

7. The message forwarding method based on extended OAM under a FTTR networking according to claim 6, wherein when the forwarding mode is an OAM broadcast forwarding mode, said message subscription procedure and message forwarding procedure specifically include the operations of:

When a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol, and a forwarding mode is designated as an OAM broadcast forwarding mode; after receiving the subscription information, the main gateway generates an OAM message routing forwarding table according to the subscription information, and simultaneously determines a broadcast channel LLID of the multiplexing original EPON system as an OAM broadcast LLID and feeds back the OAM broadcast LLID to the sub-gateway; the sub-gateway adds the fed back OAM broadcast LLID into a local OAM receiving message LLID list;

when a certain sub-gateway generates a message, sending a release message to a main gateway; the main gateway searches all subscribers according to the OAM message routing forwarding table and sends the message to all subscribers through the determined OAM broadcast LLID at one time; after receiving the message, the subscriber directly discards the message which is not in the subscription range.

8. The message forwarding method based on extended OAM under a FTTR networking according to claim 6, wherein when the forwarding mode is an OAM unicast forwarding mode, said message subscription procedure and message forwarding procedure specifically include the following operations:

When a certain sub-gateway pays attention to a certain message, a subscription message is sent to a main gateway through an extended OAM protocol, and a forwarding mode is designated as an OAM unicast forwarding mode; after receiving the subscription message, the main gateway generates an OAM message routing forwarding table according to the subscription message, and simultaneously determines a unicast LLID of a multiplexing subscription message source as an OAM unicast LLID or determines a newly allocated unicast LLID as an OAM unicast LLID and feeds back the OAM unicast LLID to the sub-gateway; the sub-gateway adds the fed back OAM unicast LLID into a local OAM receiving message LLID list according to the requirement;

When a certain sub-gateway generates a message, sending a release message to a main gateway; the main gateway searches all subscribers subscribing the message according to the OAM message routing forwarding table, and sends the message to all subscribers subscribing the message through the determined OAM unicast LLID.

9. The message forwarding method based on extended OAM under a FTTR networking according to claim 8, wherein said message forwarding flow further includes the operations of:

if the searched subscriber is not online, the main gateway caches the message until the subscriber is online and then sends the message; and delete the message after the message is successfully sent.

10. An extended OAM-based message forwarding apparatus under FTTR networking based on the method as claimed in any one of claims 1 to 9, characterized by: the device comprises a protocol expansion module arranged on a main gateway/sub gateway, a message subscription and release module arranged on the sub gateway and an OAM message routing module arranged on the main gateway;

the protocol expansion module is used for: performing extension setting on the existing OAM protocol to enable the existing OAM protocol to support a message subscription type and have a message identification function;

the message subscription and release module is used for: when the sub-gateway pays attention to a certain message, a subscription message is sent to the main gateway through an extended OAM protocol; when the sub gateway generates a message, sending a release message to the main gateway;

The OAM message routing module is configured to: when receiving a subscription message sent by a sub-gateway, generating an OAM message routing forwarding table according to the subscription message, wherein the OAM message routing forwarding table is used for recording the association relation between a subscriber and the subscribed message; when receiving the information issued by the sub gateway, searching all subscribers needing to be forwarded according to the OAM information route forwarding table, and forwarding the information.