WO2011088699A1

WO2011088699A1 - Method and apparatus for transmitting physical layer operation, administration and maintenance messages

Info

Publication number: WO2011088699A1
Application number: PCT/CN2010/078404
Authority: WO
Inventors: 张伟良; 耿丹
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-01-20
Filing date: 2010-11-04
Publication date: 2011-07-28
Also published as: CN102130841B; CN102130841A

Abstract

The present invention discloses a method and an apparatus for transmitting physical layer operation, administration and maintenance (PLOAM) messages. In said method, an upper layer network element obtains the number 'N' of PLOAM messages which can be transmitted to a lower layer network element within a downlink frame; the upper layer network element obtains the PLOAM messages according to the number of PLOAM messages; the upper layer network element transmits the obtained PLOAM messages within the downlink frame to the lower layer network element. According to the technical schemes provided by the present invention, it is ensured that the number of the PLOAM messages transmitted to one lower layer network element within a downlink frame is less than or equal to the maximal number of the PLOAM messages which can be processed by the lower layer network element.

Description

The present invention relates to the field of communications, and in particular to a method and apparatus for transmitting a Physical Layer Operations (Administration and Maintenance, PLOAM) message. BACKGROUND OF THE INVENTION Gigabit-Capable Passive Optical Network (GPON) technology is an important branch of the passive optical network (PON) family. Similar to other PON technologies, GPON is also an application point. Passive optical access technology to multi-point topology. GPON consists of an Optical Line Terminal (OLT) on the central office, an Optical Network Unit (ONU) on the user side, and an Optical Distribution Network (ODN). Use a point-to-multipoint network structure. The ODN consists of passive optical components such as single-mode fiber, optical splitter, and optical connector, providing an optical transmission medium for the physical connection between the OLT and the ONU. In order to realize the partial management function of the OLT to the ONU, the ITU-T G984.3 standard defines a physical layer operation management and maintenance (PLOAM) channel, and the GPON uses the PLOAM channel to transmit PLOAM messages to implement management of the transmission aggregation layer, including ONU activation. The ONU manages the establishment of control channels, encryption configuration, key management, and so on. In the GPON system, the PLOAM message is transmitted in an uplink frame (a frame sent by the ONU to the OLT) and a downlink frame (a frame sent by the OLT to the ONU), and each downlink frame includes a PLOAM message, and the OLT determines whether the uplink frame includes the PLOAM. Message. In the next-generation PON system based on GPON technology, it is desirable to transmit multiple PLOAM messages in one downlink frame due to an increase in transmission rate and an OLT that needs to support more ONUs. At the same time, considering the ONU's ability to process PLOAM messages in a downlink frame, it is necessary to limit the maximum number of PLOAM messages sent to the same ONU in one downlink frame. In the framing technology of the existing GPON transmission converge (GTC) layer, the GTC framing module directly extracts the PLOAM message from the queue storing PLOAM messages according to the principle of first in first out (FIFO) to form a GTC frame. Therefore, when the framing technique is applied to the next-generation PON system based on the GPON technology, the number of PLOAM messages transmitted to the same ONU in one downlink frame cannot be guaranteed to be less than or equal to the maximum number of PLOAM messages that the ONU can process. SUMMARY OF THE INVENTION The present invention provides a PLOAM message for the problem that the number of PLOAM messages transmitted to the same lower layer network element in one downlink frame cannot be equal to or less than the maximum number of PLOAM messages that the lower layer network element can process. The transmitting method and device are to solve at least one of the above problems. According to an aspect of the present invention, a method of transmitting a PLOAM message is provided. The method for transmitting a PLOAM message according to the present invention includes: the upper layer network element knows the number N of PLOAM messages that can be sent to the lower layer network element in a downlink frame, where the PLOAM message to be sent to each lower layer network element in the PLOAM message The number of the PLOAM messages is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process, N > 1 , m >0; the upper layer network element obtains the PLOAM message according to the number of PLOAM messages, wherein the acquired PLOAM The number of messages x is less than or equal to the number N of PLOAM messages, and the number of PLOAM messages corresponding to the same lower layer network element is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process, x > 0, a >0; The upper layer network element sends the acquired PLOAM message to the lower layer network element in a downlink frame. According to another aspect of the present invention, a transmitting apparatus of a PLOAM message is provided. The transmitting device of the PLOAM message according to the present invention includes: a learning unit, configured to learn the number N of PLOAM messages that can be sent to the lower layer network element in a downlink frame, where the PLOAM message is to be sent to each lower layer network. The number of the PLOAM messages of the element is less than or equal to the maximum number m of the PLOAM messages that the lower layer network element can process, N > l , m >0; the acquiring unit is configured to obtain the PLOAM message according to the number of PLOAM messages, where The number of the received PLOAM messages is less than or equal to the number N of the PLOAM messages. The number of PLOAM messages corresponding to the same lower layer network element is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process. > 0, a >0; The sending unit is configured to send the acquired PLOAM message to the lower layer network element in a downlink frame. According to the present invention, the upper layer network element obtains the PLOAM message according to the number of PLOAM messages that can be sent to the lower layer network element, and sends the PLOAM message to the lower layer network element, and can ensure that one downlink frame is sent to the network element under consideration of the processing capability of the lower layer network element. The number of PLOAM messages of the same lower layer network element is less than or equal to the maximum number of PLOAM messages that the ONU can process. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a structural block diagram of a transmitting apparatus of a PLOAM message according to an embodiment of the present invention; FIG. 2 is a structural block diagram of a transmitting apparatus of a PLOAM message according to a preferred embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 4 is a structural block diagram of a transmitting apparatus of a PLOAM message according to an example 2 of the present invention; FIG. 5 is a transmitting apparatus of a PLOAM message according to Example 3 of the present invention; FIG. 6 is a flowchart of a method for transmitting a PLOAM message according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. 1 is a block diagram showing the structure of a transmitting apparatus of a PLOAM message according to an embodiment of the present invention. As shown in FIG. 1, the transmitting apparatus of the PLOAM message according to the embodiment of the present invention includes: a learning unit 1, an obtaining unit 2, and a sending unit 3. The learning unit 1 is configured to learn the number N of PLOAM messages that can be sent to the lower layer network element in a downlink frame, where the number of PLOAM messages to be sent to each lower layer network element in the PLOAM message is less than or equal to the lower layer. The network element can process the maximum number of PLOAM messages, m > 1 , m > 0. The acquiring unit 2 is configured to obtain a PLOAM message according to the number of PLOAM messages, where the number of acquired PLOAM messages is less than or equal to PLOAM. The number of messages N, the number of PLOAM messages corresponding to the same lower layer network element is less than or equal to the maximum number m of PLOAM messages that the lower layer network element can process, x > 0, a >0; Sending the ear to the lower layer network element in a downlink frame and acquiring the unit 2

PLOAM message. The PLOAM message is sent by using the foregoing device, and the number of PLOAM messages sent to the same lower layer network element in one downlink frame is less than or equal to that of the lower layer network element, on the premise of considering the processing capability of the lower layer network element (for example, the ONU). The maximum number of PLOAM messages processed. The foregoing PLOAM message includes: a unicast PLOAM message, and/or a broadcast PLOAM message. Preferably, as shown in FIG. 2, the foregoing apparatus may further include: a first storage unit 4, connected between the learning unit 1 and the obtaining unit 2, configured to store the generated unicast PLOAM message in each lower layer network element. In the preset register, the generated broadcast PLOAM message is stored in the PLOAM message queue. Preferably, as shown in FIG. 2, the obtaining unit 2 may include: a first extraction module 20, configured to: when a preset time arrives, extract a unicast PLOAM message from a preset register corresponding to each lower layer network element; a storage module 21, configured to store the extracted unicast PLOAM message in the PLOAM message queue, and a second extraction module 22, configured to extract the PLOAM message from the PLOAM message queue. The above device will be described below in conjunction with FIG. Figure 3 is a block diagram showing the structure of a transmitting apparatus of a PLOAM message according to the first embodiment of the present invention. As shown in FIG. 3, the transmitting apparatus of the PLOAM message according to the first embodiment of the present invention includes: a PLOAM message generating unit, S registers (S is a value corresponding to the number of lower layer network elements), a timer, and an extracting unit ( It is equivalent to the first extraction module, the first storage module, the PLOAM message queue, and the framing unit (corresponding to the second extraction module). The OLT needs to send N ( N > 1 ) PLOAM messages to the lower layer NEs in one downlink frame, and the maximum number of PLOAM messages sent to each ONU in one downlink frame is m ( m > 1 ). At the OLT, a deposit for storing the PLOAM message is pre-established for each ONU.

After the PLOAM message generating unit generates a PLOAM message, the OLT reports that the PLOAM message belongs to an ONU, and the OLT stores the PLOAM message in a register of the corresponding ONU. If the PLOAM message is a broadcast PLOAM message, the OLT will PLOAM the PLOAM message. The message is placed directly into the PLOAM message queue. A timer and an extracting unit are set at the OLT. The timer is set to a timing time of T (for example, Τ > 125μ _δ ). When the timer overflows, the timer starts from zero, and the timer controls the extracting unit. Cycling (or sequentially) from the partial register corresponding to each ONU, and then placing L PLOAM messages into the PLOAM message queue, each registration The number of PLOAM messages retrieved in the device is less than or equal to m. The framing unit may include the following processing when forming a downlink frame: the framing unit sequentially fetches the PLOAM message from the PLOAM message queue, and if the consecutive PNAM messages are not included in the continuous PLOAM message, the GTC framing unit sets the N The PLOAM message constitutes a downlink frame; if the GTC framing unit sends another broadcast PLOAM message from the PLOAM message queue, if the OLT has already taken out part of the PLOAM message before broadcasting the PLOAM message, the GTC framing unit will fetch the PLOAM message before the broadcast the composition of the one or more downlink frames PLOAM message, and the broadcast ^ ¹ PLOAM message stored separately next downlink frame composed of a downlink frame; GTC framing unit if removed from the first PLOAM message PLOAM message queue is a broadcast message PLOAM Then, the broadcast PLOAM message is separately placed in the downlink frame to form a downlink frame. It can be seen from the above process that the transmitting device transmits the unicast PLOAM message extracted from the PLOAM message queue in one downlink frame; and one broadcast PLOAM message extracted from the PLOAM message queue is separately transmitted in one downlink frame. The framing unit may further include the following processing when forming a downlink frame: the framing unit sequentially extracts the PLOAM message from the PLOAM message queue, and if the continuous PNAM message is not included in the continuous PLOAM message, the GTC framing unit will use the N The PLOAM message constitutes a downlink frame; if the GTC framing unit sends another broadcast PLOAM message from the PLOAM message queue, the broadcast PLOAM message is previously extracted with the unicast PLOAM message (may also include: the unicast PLOAM taken out later) The message is sent to form a downlink frame, and the number of PLOAM messages to be sent to each lower layer network element needs to meet a condition that is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process. It can be seen from the above process that the transmitting device can also send the unicast PLOAM message and the one broadcast PLOAM message extracted from the PLOAM message queue in one downlink frame. Preferably, the foregoing apparatus may further include: a comparing unit 5, configured to compare the generated PLOAM message with the identifier information of the lower layer network element corresponding to the PLOAM message in the PLOAM message queue; the determining unit 6 is configured to determine, according to the comparison result, Whether the identifier information of the lower layer network element corresponding to the m PLOAM message is consistent with the identifier information of the lower layer network element corresponding to the generated PLOAM message in the PLOAM message queue; the second storage unit 7 is configured to be used when the output of the determining unit is YES. , the generated PLOAM message is stored in the preset first register, and the output of the determining unit is In the case of no, the generated PLOAM message is stored in the PLOAM message queue. The obtaining unit 2 may further include: a comparing module 23, configured to: compare, when the preset time arrives, compare whether the identifier information of the lower layer network element corresponding to the PLOAM message in the first register and the PLOAM message queue in the PLOAM message queue are consistent; a determining module 24, configured to determine whether there are p PLOAM messages in the PLOAM message queue and the same lower layer network element identification information of the PLOAM message in the first register, where 0 < p <m; the second storage module The PLOAM message with the same identifier information of the lower layer network element corresponding to the p PLOAM messages in the first register is extracted and stored in the PLOAM message queue, where the output of the first judgment module is YES. The number of PLOAM messages with the same identifier in the PLOAM message queue is less than or equal to m. The third extraction module 26 is configured to extract a PLOAM message from the PLOAM message queue. The above apparatus will be described below with reference to Fig. 4. Fig. 4 is a block diagram showing the structure of a transmitting apparatus of a PLOAM message according to the second embodiment of the present invention. As shown in FIG. 4, the transmitting apparatus of the PLOAM message according to the second embodiment of the present invention includes: a PLOAM message generating unit, a comparing unit, a register (corresponding to the aforementioned first register), and an extracting comparing unit (equivalent to the foregoing The comparison module, the first judgment module, the second storage module, the timer, the PLOAM message queue, and the framing unit (corresponding to the aforementioned third extraction module).

The OLT needs to send N ( N > 1 ) PLOAM messages in one downlink frame, and the maximum number of PLOAM messages sent to each ONU in one downlink frame is m ( m > 1 ). At the OLT, a register needs to be set in advance. At the OLT, after the PLOAM message generating unit generates a PLOAM, the ONU-ID of the newly generated PLOAM and the ONU-ID of all PLOAM messages in the PLOAM message queue are compared by the comparing unit, if there are m PLOAM messages in the PLOAM message queue. The ONU-ID is the same as the ONU-ID of the newly generated PLOAM, and the OLT stores the newly generated PLOAM message in a register at the input of the PLOAM message queue. Otherwise, the OLT puts the newly generated PLOAM message into the PLOAM message queue. A timer and an extraction comparison unit are set at the OLT. The timer has a timing of Τ ( Τ > 125μ _δ ). When the timer overflows, the timer starts from zero, and the timer controls the comparison unit in the compare register. The ONU-ID of the PLOAM message and the ONU-ID of the PLOAM message in the PLOAM message queue. If the number of ONU-IDs in the PLOAM message queue is less than m, the extraction comparison unit stores the PLOAM message in the register to the PLOAM message queue. Otherwise, the PLOAM message in the register is still stored in the register. The framing unit may include the following processing when forming a downlink frame: At the OLT, the framing unit sequentially extracts the PLOAM message from the PLOAM message queue when forming a downlink frame, and does not include the broadcast PLOAM if the N PLOAM messages are continuously fetched. Message, the GTC framing unit forms the N PLOAM messages into a downlink frame; if the GTC framing unit fetches a broadcast PLOAM message from the PLOAM message queue, if the OLT has already taken out part of the PLOAM message before broadcasting the PLOAM message, then the GTC The framing unit ^ ¹ broadcasts the PLOAM message before the one or more PLOAM messages form a downlink frame, and the broadcast PLOAM message is separately placed in the next downlink frame to form a downlink frame; if the GTC framing unit is taken out from the PLOAM message queue The first PLOAM message is a broadcast PLOAM message, and the broadcast PLOAM message is separately placed in the downlink frame to form a downlink frame. The principle that the above-mentioned extraction comparison unit takes out the PLOAM message sequence from the register is: the principle of first-in first-out or the principle of first taking out the PLOAM message with the highest priority. It can be seen from the above process that the transmitting device transmits the unicast PLOAM message extracted from the PLOAM message queue in one downlink frame; and one broadcast PLOAM message extracted from the PLOAM message queue is separately transmitted in one downlink frame. The framing unit may further include the following processing when forming a downlink frame: the framing unit sequentially extracts the PLOAM message from the PLOAM message queue, and if the continuous PNAM message is not included in the continuous PLOAM message, the GTC framing unit will use the N The PLOAM message constitutes a downlink frame; if the GTC framing unit sends another broadcast PLOAM message from the PLOAM message queue, the broadcast PLOAM message is previously extracted with the unicast PLOAM message (may also include: the unicast PLOAM taken out later) The message is sent to form a downlink frame, and the number of PLOAM messages to be sent to each lower layer network element needs to meet a condition that is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process. It can be seen from the above process that the transmitting device can also send the unicast PLOAM message and the one broadcast PLOAM message extracted from the PLOAM message queue in one downlink frame. Preferably, as shown in FIG. 2, the foregoing sending apparatus may further include: a third storage unit 8 configured to store the generated PLOAM message in a PLOAM message queue. The obtaining unit 2 may further include: a fourth extracting module 27, configured to extract a PLOAM message from the preset second register and the PLOAM message queue, or from the second register; The determining module 28 is configured to determine, in the case that the extracted PLOAM message does not include the broadcast PLOAM message, whether the number q of PLOAM messages corresponding to the same lower layer network element is smaller than the maximum number m of the PLOAM messages that the network element can process; The third storage module 29 is configured to store (qm) PLOAM messages into the second register if the output of the second determining module is negative; the processing module 30 is configured to sequentially sequence from the PLOAM message and/or The (qm) PLOAM messages extracted from the two registers together with the previously extracted PLOAM messages form N PLOAM messages, until the number of PLOAM messages corresponding to the same lower layer network element in the N PLOAM messages is determined to be smaller than the network. The meta can handle the maximum number m of PLOAM messages.

The following is described in conjunction with Fig. 5, which is a block diagram showing the structure of a transmitting apparatus for a PLOAM message according to the third embodiment of the present invention. As shown in FIG. 5, the transmitting apparatus of the PLOAM message according to the third embodiment of the present invention includes: a PLOAM message generating unit, a PLOAM message queue, a register (corresponding to a second register), and a framing unit (corresponding to a processing module).

The OLT needs to send N ( N > 1 ) PLOAM messages in one downlink frame, and the maximum number of PLOAM messages sent to each ONU in one downlink frame is m ( m > 1 ). At the OLT, a register needs to be set in advance. At the OLT, after a PLOAM message is generated, the newly generated PLOAM message is directly placed in the PLOAM message queue. When the GTC framing unit constructs the downlink frame, a total of N PLOAM messages are fetched from the register in the figure and the PLOAM message queue. If the consecutive PLOAM messages are not included in the continuous PLOAM message, the ONU-IDs of the N PLOAM messages are compared. If the number of the same ONU-ID is q, and q is greater than m, the OLT fetches (qm) PLOAM messages from the same PLOAM message with the same ONU-ID into the register. Then, the OLT continues to fetch (qm) PLOAM messages from the PLOAM message queue (and/or register), and the PLOAM message fetched for the first time constitutes a PLOAM message group with N number of messages, if N PLOAM messages are not included Broadcasting the PLOAM message, the OLT compares the ONU-IDs of the N PLOAM messages in the manner described above, and repeats the above steps until the number of identical ONU-IDs in the extracted N PLOAM message groups is less than or equal to m.

The GTC framing unit forms the N PLOAM messages into a downlink frame; if the GTC framing unit fetches a broadcast PLOAM message from the PLOAM message queue, if the OLT has already taken out part of the PLOAM message before broadcasting the PLOAM message, and in the partial PLOAM message If the number of the same ONU-ID is less than or equal to m, the GTC framing unit forms one or more PLOAM messages taken before the PLOAM message is broadcast into a downlink frame, and the broadcast PLOAM message is separately placed in the next downlink frame to form a downlink frame; The frame unit takes the first out of the PLOAM message queue The PLOAM message is a broadcast PLOAM message, and the broadcast PLOAM message is separately placed in the downlink frame to form a downlink frame. It can be seen from the above process that the transmitting device transmits the unicast PLOAM message extracted from the PLOAM message queue in one downlink frame; and one broadcast PLOAM message extracted from the PLOAM message queue is separately transmitted in one downlink frame. The framing unit may further include the following processing when forming a downlink frame: the framing unit sequentially extracts the PLOAM message from the PLOAM message queue, and if the continuous PNAM message is not included in the continuous PLOAM message, the GTC framing unit will use the N The PLOAM message constitutes a downlink frame; if the GTC framing unit sends another broadcast PLOAM message from the PLOAM message queue, the broadcast PLOAM message is previously extracted with the unicast PLOAM message (may also include: the unicast PLOAM taken out later) The message is sent to form a downlink frame, and the number of PLOAM messages to be sent to each lower layer network element needs to meet a condition that is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process. Preferably, in the foregoing process, the OLT takes a total of N PLOAM messages from the register and the PLOAM message queue, and the priority order is: The OLT preferentially fetches all PLOAM messages from the register, and the number of all PLOAM messages in the register is less than N. Next, the OLT continues to fetch PLOAM messages from the PLOAM message queue. In the above process, the principle that the OLT takes out the PLOAM message sequence from the register is the principle of first-in first-out or the principle of first taking out the PLOAM message with the highest priority. The device provided by the foregoing three examples can ensure that the number of PLOAM messages sent to the same lower layer network element in one downlink frame is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process when transmitting the PLOAM message. FIG. 6 is a flowchart of a method for transmitting a PLOAM message according to an embodiment of the present invention. As shown in FIG. 6, the method for transmitting a PLOAM message according to an embodiment of the present invention includes the following processing (step S601 - step S605): Step S601: The upper layer network element learns the PLOAM message that can be sent to the lower layer network element in one downlink frame. The number of PLOAM messages to be sent to each of the lower layer network elements in the PLOAM message is less than or equal to the maximum number m of PLOAM messages that the lower layer network element can process, N > 1 , m >0; Step S603: The upper layer network element obtains a PLOAM message according to the number of PLOAM messages, where the number of acquired PLOAM messages is less than or equal to the number N of PLOAM messages, and the number of acquired PLOAM messages corresponding to the same lower layer network element is smaller than The maximum number of PLOAM messages that can be processed by the lower layer network element is m, x > 0, a > 0. Step S605: The upper layer network element sends the acquired PLOAM message to the lower layer network element in a downlink frame. In the above method, when multiple PLOAM messages are sent in one downlink frame, the number of PLOAM messages sent to the same lower layer network element in one downlink frame is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process. . The upper layer network element includes but is not limited to: an optical line terminal (OLT), and the lower layer network element includes but is not limited to: an optical network unit (ONU). The PLOAM message includes: a unicast PLOAM message, and/or a broadcast PLOAM message. Preferably, before performing step S603, the following process may be further included: the upper layer network element stores the generated unicast PLOAM message in a preset register corresponding to each lower layer network element, and stores the generated broadcast PLOAM message in the PLOAM message. In the queue. Then step 4 S603 can further include the following processing:

(1) When the preset time arrives, the upper layer network element raises the unicast and unicast PLOAM message from the preset register corresponding to each lower layer network element. Preferably, the upper layer network element is sequentially extracted from each lower layer by sequential or sequential loop extraction. The acquired PLOAM message is extracted from a preset register corresponding to the network element.

(2) The upper layer network element stores the extracted unicast PLOAM message in the PLOAM message queue;

(3) The upper layer NE extracts the PLOAM message from the PLOAM message queue. In a specific implementation process, the upper layer network element sends the acquired PLOAM message to the lower layer network element in a downlink frame, including one of the following:

(1) The upper layer network element sends the unicast PLOAM message extracted from the PLOAM message queue in one downlink frame; (2) The upper layer network element sends the unicast PLOAM message and one broadcast PLOAM message extracted from the PLOAM message queue in one downlink frame;

(3) The upper layer network element sends a broadcast PLOAM message extracted from the PLOAM message queue in a downlink frame. In the specific implementation process, the foregoing three transmission modes can be referred to the descriptions in FIG. 3 to FIG. 5, and details are not described herein again. Preferably, before performing step S603, the following processing may also be included:

(1) The upper layer network element compares the generated PLOAM message with the identifier information of the lower layer network element corresponding to the PLOAM message in the PLOAM message queue; (2) determining whether there are m PLOAM messages in the PLOAM message queue according to the comparison result. The identifier information of the corresponding lower layer network element is consistent with the identifier information of the lower layer network element corresponding to the generated PLOAM message;

(3) If yes, the generated PLOAM message is stored in a preset first register;

(4) Otherwise, the generated PLOAM message is stored in the PLOAM message queue. Then step 4 S603 can further include the following processing:

(1) When the preset time arrives, the upper layer network element compares whether the identification information of the lower layer network element corresponding to each PLOAM message in the first register and the PLOAM message in the PLOAM message queue is consistent;

(2) if there are p PLOAM messages in the PLOAM message queue and the same identification information of the corresponding lower layer network element of the PLOAM message in the first register, where 0 < p < m, the first register is PLOAM messages with the same identification information of the lower layer network element corresponding to the p PLOAM messages are extracted and stored in the PLOAM message queue;

(3) The upper layer network element extracts the PLOAM message from the PLOAM message queue. In the specific implementation process, the upper layer network element may also send the obtained PLOAM message by using one of the three methods mentioned above. Preferably, before performing step S603, the following processing may be further included: the upper layer network element stores the generated PLOAM message in the PLOAM message queue. Then step 4 S603 can further include the following processing:

(1) The upper layer network element extracts the PLOAM message from the PLOAM message queue and/or the preset second register; in the specific implementation process, in the foregoing step (1), the upper layer network element is from the PLOAM message queue and/or the preset Extracting the acquired PLOAM message in the second register may include the following processing:

(1.1) The upper layer network element extracts some or all PLOAM messages from the second register, wherein the number of PLOAM messages extracted from the second register is r, r < X; (1.2) in the case of r < X The upper layer network element extracts (xr) PLOAM messages from the PLOAM message queue.

(2) In the case that the broadcast PLOAM message is not included in the PLOAM message, it is determined whether the number q of PLOAM messages corresponding to the same lower layer network element is smaller than the maximum number m of the PLOAM messages that the network element can process; (3) If no, store (qm) PLOAM messages in the second register;

(4) The upper layer network element sequentially combines (qm) PLOAM messages extracted from the PLOAM message queue and/or the second register with the previously extracted PLOAM message to form N PLOAM messages until the determined N PLOAM messages are determined. The number q of PLOAM messages corresponding to the same lower layer network element is smaller than the maximum number m of the network element capable of processing PLOAM messages. During the implementation process, the upper-layer NE can send the obtained PLOAM message in the following manner:

(1) The upper layer network element sends the unicast PLOAM message extracted from the PLOAM message queue and/or the second register in a downlink frame;

(2) The upper layer network element sends a broadcast PLOAM message extracted from the PLOAM message queue/or the second register in a downlink frame;

(3) The upper layer network element transmits the unicast PLOAM message and one or more broadcast PLOAM messages extracted from the PLOAM message queue and/or the second register in one downlink frame. In the above process, the principle that the OLT takes out the PLOAM message sequence from the register is the principle of first-in first-out or the principle of first taking out the PLOAM message with the highest priority. With the three methods provided by the foregoing embodiments, when the PLOAM message is sent, the number of PLOAM messages sent to the same lower layer network element in one downlink frame is less than or equal to the maximum PLOAM message that the lower layer network element can process. number. In summary, with the above embodiments provided by the present invention, the number of PLOAM messages sent to the same lower layer network element (for example, ONU) in one downlink frame is larger than the maximum PLOAM message that the lower layer network element can process. The number of problems can ensure that the number of PLOAM messages sent to the same lower layer network element in one downlink frame is less than or equal to the maximum number of PLOAM messages that the lower layer network element can process, which effectively improves the reliability of the system. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A physical layer operation management and maintenance method for transmitting a PLOAM message, comprising: the upper layer network element knowing the number N of PLOAM messages that can be sent to the lower layer network element in a downlink frame, where the PLOAM message The number of PLOAM messages to be sent to each of the lower layer network elements is less than or equal to the maximum number m of PLOAM messages that the lower layer network element can process, N > 1 , m > 0;

The upper layer network element obtains a PLOAM message according to the number of the PLOAM messages, where the number X of the acquired PLOAM messages is less than or equal to the number N of the PLOAM messages, and the obtained PLOAM message corresponding to the same lower layer network element is obtained. The number a is less than or equal to the maximum number m of PLOAM messages that the lower layer network element can process, x > 0, a > 0;

The upper layer network element sends the acquired PLOAM message to the lower layer network element in a downlink frame.

The method of claim 1, wherein before the acquiring the PLOAM message by the number of the PLOAM messages, the method further includes:

The unicast PLOAM message generated by the upper-layer network element is stored in a preset register corresponding to each of the lower-layer network elements, and the generated broadcast PLOAM message is stored in a PLOAM message queue.

The method of claim 2, wherein the obtaining, by the upper layer network element, the PLOAM message according to the number of the PLOAM messages comprises:

When the preset time arrives, the upper layer network element extracts a unicast PLOAM message from a preset register corresponding to each of the lower layer network elements;

The upper layer network element stores the extracted unicast PLOAM message in a PLOAM message queue;

The upper layer network element extracts a PLOAM message from the PLOAM message queue.

The method according to claim 1, wherein before the acquiring, by the upper-layer network element, the PLOAM message according to the number of the PLOAM messages, the method further includes:

The PLOAM message generated by the upper layer network element is compared with the identification information of the lower layer network element corresponding to the PLOAM message in the PLOAM message queue; And determining, according to the comparison result, whether the identifier information of the lower layer network element corresponding to the m PLOAM messages in the PLOAM message queue is consistent with the identifier information of the lower layer network element corresponding to the generated PLOAM message;

If so, the generated PLOAM message is stored in a preset first register; otherwise, the generated PLOAM message is stored in the PLOAM message queue.

The method of claim 4, wherein the obtaining, by the upper layer network element, the PLOAM message according to the number of the PLOAM messages comprises:

When the preset time is up, the upper layer network element compares whether the identifier information of the lower layer network element corresponding to each PLOAM message in the first register and the PLOAM message in the PLOAM message queue is consistent;

If there are p PLOAM messages in the PLOAM message queue and the identification information of the corresponding lower layer network element of the PLOAM message in the first register, where 0 < p < m, the first register is The PLOAM message with the same identifier information of the lower layer network element corresponding to the p PLOAM messages is extracted and stored in the PLOAM message queue, wherein the number of PLOAM messages with the same identifier in the stored PLOAM message queue is less than or equal to m;

The upper layer network element stores the generated PLOAM message in the PLOAM message queue.

The method of claim 6, wherein the obtaining, by the upper layer network element, the PLOAM message according to the number of the PLOAM messages comprises:

Extracting, by the upper layer network element, the acquired PLOAM message from the PLOAM message queue and/or a preset second register;

If the obtained PLOAM message does not include the broadcast PLOAM message, determine whether the number of PLOAM messages corresponding to the same lower layer network element is less than the maximum number of PLOAM messages that the network element can process;

If not, storing (qm) the PLOAM messages into the second register; The upper layer network element sequentially combines (qm) PLOAM messages extracted from the PLOAM message queue and/or the second register with the previously extracted PLOAM message to form N PLOAM messages until the determined composition The number q of PLOAM messages corresponding to the same lower layer network element in the N PLOAM messages is smaller than the maximum number m of the PLOAM messages that the network element can process.

8. The physical layer operation management and maintenance device for transmitting a PLOAM message, comprising: a learning unit, configured to learn the number N of PLOAM messages that can be sent to a lower layer network element in a downlink frame, where The number of PLOAM messages to be sent to each of the lower layer network elements in the PLOAM message is less than or equal to the maximum number m of PLOAM messages that the lower layer network element can process, N > 1 , m > 0;

And an obtaining unit, configured to obtain a PLOAM message according to the number of the PLOAM messages, where the number X of the acquired PLOAM messages is less than or equal to the number N of the PLOAM messages, and the obtained PLOAM message corresponding to the same lower layer network element is obtained. The number a is less than or equal to the maximum number m of PLOAM messages that the lower layer network element can process, x > 0, a > 0;

And a sending unit, configured to send the acquired PLOAM message to the lower layer network element in a downlink frame.

9. The device according to claim 8, wherein the device further comprises:

And a first storage unit, configured to store the generated unicast PLOAM message in a preset register corresponding to each of the lower layer network elements, and store the generated broadcast PLOAM message in a PLOAM message queue.

The device according to claim 9, wherein the acquiring unit comprises:

a first extraction module, configured to: when a preset time arrives, extract a unicast PLOAM message from a preset register corresponding to each of the lower layer network elements;

a first storage module, configured to store the extracted unicast PLOAM message in a PLOAM message queue;

And a second extraction module, configured to extract a PLOAM message from the PLOAM message queue.

The device according to claim 8, wherein the device further comprises:

Comparing unit, the PLOAM message generated by the ^ ^{1 is} compared with the identification information of the lower layer network element corresponding to the PLOAM message in the PLOAM message queue; a determining unit, configured to determine, according to the comparison result, whether the identifier information of the lower layer network element corresponding to the m PLOAM messages in the PLOAM message queue is consistent with the identifier information of the lower layer network element corresponding to the generated PLOAM message;

a second storage unit, configured to: when the output of the determining unit is YES, store the generated PLOAM message in a preset first register, and if the output of the determining unit is negative, The generated PLOAM message is stored in the PLOAM message queue.

The device according to claim 11, wherein the acquiring unit comprises:

a comparison module, configured to compare, when the preset time arrives, whether the identifier information of the lower layer network element corresponding to each PLOAM message in the first register and the PLOAM message in the PLOAM message queue is consistent;

a first determining module, configured to determine whether there are p PLOAM messages in the PLOAM message queue, and the same information of the corresponding lower layer network element of the PLOAM message in the first register is the same, where 0 < p < m;

a second storage module, configured to: when the output of the first determining module is YES, extract and store the PLOAM message with the same identifier information of the lower layer network element corresponding to the p PLOAM messages in the first register Up to the PLOAM message queue, wherein the number of PLOAM messages with the same identifier in the PLOAM message queue is less than or equal to m; and the third extracting module is configured to extract a PLOAM message from the PLOAM message queue.

The device according to claim 8, wherein the device further comprises:

And a third storage unit, configured to store the generated PLOAM message in the PLOAM message queue.

The device according to claim 13, wherein the acquiring unit comprises:

a fourth extraction module, configured to extract the acquired PLOAM message from the PLOAM message queue and/or a preset second register;

a second determining module, configured to determine, in the case that the acquired PLOAM message does not include a broadcast PLOAM message, whether the number q of PLOAM messages corresponding to the same lower layer network element is smaller than a maximum size of the PLOAM message that the network element can process Number m;

a third storage module, configured to: when the output of the second determining module is negative,

(qm) storing the PLOAM message into the second register; a processing module, configured to sequentially combine (qm) the PLOAM messages extracted from the PLOAM message queue and/or the second register with the previously extracted PLOAM message into N PLOAM messages until determining a composition The number q of PLOAM messages corresponding to the same lower layer network element in the N PLOAM messages is smaller than the maximum number m of the PLOAM messages that the network element can process.