CN107547124B

CN107547124B - Reset control method and device

Info

Publication number: CN107547124B
Application number: CN201610476117.6A
Authority: CN
Inventors: 张雪
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-06-24
Filing date: 2016-06-24
Publication date: 2021-06-15
Anticipated expiration: 2036-06-24
Also published as: CN107547124A; WO2017220025A1

Abstract

The invention provides a reset control method and a device, wherein the method comprises the following steps: controlling the resetting of a data cache unit in a service sending direction in an OTN bearing framework of an optical transmission network according to the service information of a first service layer; and controlling the data cache unit in the service receiving direction in the OTN bearing framework to reset according to the service information of the second service layer, so that the problem of poor time delay stability of OTN bearing in the related technology is solved, and the time delay stability of OTN bearing is improved.

Description

Reset control method and device

Technical Field

The invention relates to the field of communication, in particular to a reset control method and device.

Background

An Optical Transport Network (OTN) is a comprehensive bearer device adopting a Wavelength Division Multiplexing (WDM) technology, and in a novel Radio access Network architecture (C-RAN) bearer scheme, a Common Public Radio Interface (CPRI) is used as one of service types borne by the OTN, various mapping schemes of the CPRI over OTN have been specified in the ITU-T g.709 standard, and the bearer scheme is suitable for a scene with a short Optical fiber resource or a long transmission distance, and supports a plurality of topological structures such as a ring topology, a chain topology, and a ring band chain. And the OTN is adopted for bearing, so that although the cost of OTN transmission equipment is increased, the requirement on optical fibers is greatly reduced, and the method is suitable for large-scale C-RAN networking. Meanwhile, the OTN can not only bear the C-RAN, but also realize comprehensive bearing on the existing SDH/MSTP/PTN transmission, PON/Ethernet and other bare fiber services, and meanwhile, the OTN bearing has perfect protection, Operation Administration and Maintenance (OAM) and fault diagnosis capabilities.

The OTN bearing mode of the C-RAN framework becomes a necessary choice for Long Term Evolution (LTE) system scale commercial use in the future, and also becomes a development trend of a wireless access network framework. The architecture mainly comprises three components: a distributed network consisting of Remote Radio Units (RRUs) and antennas; a high-bandwidth low-latency Optical Transport Network (OTN) connecting the remote radio unit and the baseband unit (BBU); the centralized baseband processing pool is composed of a high-performance general processor and a real-time virtual technology.

In the CPRI over OTN scheme, CPRI has high requirements on delay performance and requires symmetry of transmission and reception. The OTN bearer approach also has its own drawbacks, and the delay stability is not very high.

For the problem of poor delay stability of OTN bearer in the related art, no effective solution exists at present.

Disclosure of Invention

The embodiment of the invention provides a reset control method and a reset control device, which are used for at least solving the problem of poor time delay stability of OTN (optical transport network) bearing in the related technology.

According to an embodiment of the present invention, there is provided a reset control method including: controlling the resetting of a data cache unit in a service sending direction in an OTN bearing framework of an optical transmission network according to the service information of a first service layer; and controlling the data cache unit in the service receiving direction in the OTN bearing framework to reset according to the service information of the second service layer.

Optionally, controlling, according to the first service layer service information, the resetting of the data cache unit in the service sending direction in the OTN bearer architecture includes: judging whether the preset service in the service sending direction jumps from an abnormal state to a normal state; detecting a first frame header signal of a first optical line data unit ODU when it is determined that the predetermined service hops from the abnormal state to the normal state; and when detecting the first frame header signal of the first ODU, taking the first frame header signal of the first ODU as the service information of the first service layer, and controlling a data cache unit in the service sending direction in the OTN bearer architecture to be reset.

Optionally, taking a first frame header signal of the first ODU as the first service layer service information, and controlling the resetting of the data cache unit in the service sending direction in the OTN bearer architecture includes: generating a first reset signal when a first frame header signal of the first ODU arrives; and sending the first reset signal to a data cache unit in a client side receiving direction in the service sending direction, and resetting the data cache unit in the client side receiving direction.

Optionally, after sending the first reset signal to the data buffering unit in the client-side receiving direction in the service sending direction, and resetting the data buffering unit in the client-side receiving direction, the method further includes: judging whether a lost signal of an ODU frame of a second ODU disappears, where the second ODU is an ODU of a lower order than the first ODU; detecting a first frame header signal of the first ODU after the loss signal of the ODU frame of the second ODU disappears, when it is determined that the loss signal of the ODU frame of the second ODU disappears; generating a second reset signal when the first frame header signal of the first ODU arrives after the loss signal of the ODU frame of the second ODU disappears; and sending the second reset signal to a data cache unit in the transmission direction of the line side, and resetting the data cache unit in the transmission direction of the line side.

Optionally, controlling, according to the second service layer service information, the resetting of the data cache unit in the service receiving direction in the OTN bearer architecture includes: judging whether a lost signal of an ODU frame of a third ODU disappears; detecting a first frame header signal of a fourth ODU when it is determined that the missing signal of the ODU frame of the third ODU disappears, where the fourth ODU is an ODU higher in order than the third ODU; generating a third reset signal when a first frame header signal of the fourth ODU arrives; and sending the third reset signal to the data cache unit in the service receiving direction to reset the data cache unit in the service receiving direction.

According to another embodiment of the present invention, there is provided a reset control apparatus including: the first control module is used for controlling the resetting of the data cache unit in the service sending direction in the OTN bearing framework according to the first service layer service information; and the second control module is used for controlling the resetting of the data cache unit in the service receiving direction in the OTN bearing framework according to the service information of the second service layer.

Optionally, the first control module comprises: a first judging unit, configured to judge whether a predetermined service in the service sending direction jumps from an abnormal state to a normal state; a first detecting unit, configured to detect a first frame header signal of a first optical line data unit ODU when it is determined that the predetermined service hops from the abnormal state to the normal state; a control unit, configured to, when a first frame header signal of the first ODU is detected, use the first frame header signal of the first ODU as the first service layer service information, and control a data cache unit in the service sending direction in the OTN bearer architecture to reset.

Optionally, the control unit is configured to: generating a first reset signal when a first frame header signal of the first ODU arrives; and sending the first reset signal to a data cache unit in a client side receiving direction in the service sending direction, and resetting the data cache unit in the client side receiving direction.

Optionally, the control unit is further configured to: judging whether a lost signal of an ODU frame of a second ODU disappears, where the second ODU is an ODU of a lower order than the first ODU; detecting a first frame header signal of the first ODU after the loss signal of the ODU frame of the second ODU disappears, when it is determined that the loss signal of the ODU frame of the second ODU disappears; generating a second reset signal when the first frame header signal of the first ODU arrives after the loss signal of the ODU frame of the second ODU disappears; and sending the second reset signal to a data cache unit in the transmission direction of the line side, and resetting the data cache unit in the transmission direction of the line side.

Optionally, the second control module comprises: a second determining unit, configured to determine whether a loss signal of an ODU frame of a third ODU disappears; a second detecting unit, configured to detect a first frame header signal of a fourth ODU when it is determined that a loss signal of an ODU frame of the third ODU disappears, where the fourth ODU is an ODU higher in order than the third ODU; a generating unit, configured to generate a third reset signal when a first frame header signal of the fourth ODU arrives; and the processing unit is used for sending the third reset signal to the data cache unit in the service receiving direction to reset the data cache unit in the service receiving direction.

According to the invention, the data cache unit in the service sending direction in the OTN bearing framework of the optical transmission network is controlled to reset according to the service information of the first service layer; the data cache unit in the service receiving direction in the OTN bearer architecture is controlled to be reset according to the service information of the second service layer, and thus, by resetting the data cache unit in the service sending direction and the data cache unit in the service receiving direction according to the above scheme, the data cache unit in the OTN bearer architecture is reset step by step, so that the delay stability of the OTN bearer is improved, and the problem of poor delay stability of the OTN bearer in the related technology is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a flow chart of a reset control method according to an embodiment of the present invention;

FIG. 2 is a block diagram of a reset control apparatus according to an embodiment of the present invention;

FIG. 3 is a block diagram of a reset control apparatus according to an embodiment of the present invention;

fig. 4 is a block diagram of a reset control apparatus according to an embodiment of the present invention;

FIG. 5 is a block diagram of a reset control apparatus according to an alternative embodiment of the present invention;

FIG. 6 is a flow chart of a reset control method according to an alternative embodiment of the present invention;

fig. 7 is a block diagram of a reset control apparatus according to an alternative example of the present invention;

FIG. 8 is a flow chart of a reset control method according to an alternative exemplary one of the present invention;

fig. 9 is a block diagram showing a configuration of a reset control apparatus according to a second alternative example of the present invention;

fig. 10 is a block diagram showing a configuration of a reset control apparatus according to an alternative example three of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Example 1

In the present embodiment, a reset control method is provided, and fig. 1 is a flowchart of a reset control method according to an embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S102, controlling the data buffer unit in the service sending direction in the OTN bearing framework of the optical transmission network to reset according to the service information of the first service layer;

and step S104, controlling the data cache unit in the service receiving direction in the OTN bearing framework to reset according to the service information of the second service layer.

Optionally, the reset control method may be applied to, but not limited to, a scenario in which an OTN carries data transmission. For example: the OTN carries a scene of transmission of CPRI data.

Through the steps, the data cache unit in the service sending direction in the OTN bearing framework of the optical transmission network is controlled to reset according to the service information of the first service layer; the data cache unit in the service receiving direction in the OTN bearer architecture is controlled to be reset according to the service information of the second service layer, and therefore, by resetting the data cache unit in the service sending direction and the data cache unit in the service receiving direction according to the above scheme, the data cache unit in the OTN bearer architecture is reset step by step, so that the delay stability of the OTN bearer is improved, and the problem of poor delay stability of the OTN bearer in the related technology is solved.

Optionally, in step S102, it may be determined whether to detect the first service layer service information (for example, a first frame header signal of the first ODU) by determining a state of the predetermined service in the service sending direction, and if the first service layer service information is detected, the data caching unit in the service sending direction is controlled to be reset by the first service layer service information. For example: judging whether a predetermined service in a service sending direction jumps from an abnormal state to a normal state, detecting a first frame header signal of a first optical line data unit (ODU) under the condition that the predetermined service jumps from the abnormal state to the normal state is judged, and controlling a data cache unit in the service sending direction in an OTN bearing framework to reset by taking the first frame header signal of the first ODU as service information of a first service layer under the condition that the first frame header signal of the first ODU is detected.

Alternatively, the predetermined traffic in the traffic transmission direction may include, but is not limited to, client-side traffic.

Optionally, when the first service layer service information is a first frame header signal of the first ODU, in step S102, the first reset signal may be generated by, but not limited to, triggering through the first frame header signal of the first ODU, so as to reset the data cache unit in the receiving direction of the client side by using the first reset signal. For example: when a first frame header signal of the first ODU arrives, a first reset signal is generated, and the first reset signal is sent to a data cache unit in a client-side receiving direction in a service sending direction, so that the data cache unit in the client-side receiving direction is reset.

Optionally, after the first reset signal is sent to the data cache unit in the client-side receiving direction in the service sending direction, and the data cache unit in the client-side receiving direction is reset, it may further be determined whether a loss signal of an ODU frame of a second ODU is disappeared, where the second ODU is an ODU lower in order than the first ODU, and when it is determined that the loss signal of the ODU frame of the second ODU is disappeared, a first frame header signal of the first ODU after the disappearance of the loss signal of the ODU frame of the second ODU is detected, and when the first frame header signal of the first ODU after the disappearance of the loss signal of the ODU frame of the second ODU arrives, a second reset signal is generated and sent to the data cache unit in the line sending direction, so that the data cache unit in the line sending direction is reset.

Through the above steps, after the data cache unit in the client side receiving direction is reset, when the first frame header signal of the first ODU arrives after the loss signal of the ODU frame of the second ODU disappears, a second reset signal is generated, and the data cache unit in the line side transmitting direction is reset by using the second reset signal. The step-by-step resetting of the data cache unit in the service sending direction is realized, and the time delay stability of OTN bearing is improved.

Optionally, in the step S104, but not limited to, determining whether to detect a first frame header signal of a fourth ODU by judging whether a loss signal of an ODU frame of a third ODU in the service receiving direction disappears, and generating a third reset signal when the first frame header signal of the fourth ODU is detected, and resetting the data cache unit in the service receiving direction by using the generated third reset signal. For example: judging whether a loss signal of an ODU frame of a third ODU disappears, and under the condition that the loss signal of the ODU frame of the third ODU disappears, detecting a first frame header signal of a fourth ODU, where the fourth ODU is an ODU higher than the third ODU, generating a third reset signal when the first frame header signal of the fourth ODU arrives, and sending the third reset signal to a data cache unit in a service receiving direction, so as to reset the data cache unit in the service receiving direction.

Example 2

In this embodiment, a reset control device is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and the description of the device already made is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 2 is a block diagram of a first structure of a reset control device according to an embodiment of the present invention, as shown in fig. 2, the device includes:

the first control module 22 is configured to control, according to the first service layer service information, resetting of the data cache unit in the service sending direction in the OTN bearer architecture of the optical transport network;

and a second control module 24, coupled to the first control module 22, configured to control, according to the second service layer service information, resetting of the data cache unit in the service receiving direction in the OTN bearer architecture.

Optionally, the reset control apparatus may be applied to, but not limited to, a scenario in which an OTN carries data transmission. For example: the OTN carries a scene of transmission of CPRI data.

Through the device, the first control module controls the resetting of the data cache unit in the service sending direction in the OTN bearing framework of the optical transmission network according to the service information of the first service layer; the second control module controls the data cache unit in the service receiving direction in the OTN bearer architecture to reset according to the second service layer service information, and thus, it can be seen that, by resetting the data cache unit in the service sending direction and the data cache unit in the service receiving direction according to the above-mentioned scheme, the data cache unit in the OTN bearer architecture is reset step by step, and therefore, the delay stability of the OTN bearer is improved, and the problem of poor delay stability of the OTN bearer in the related art is solved.

Fig. 3 is a block diagram of a second structure of the reset control apparatus according to the embodiment of the present invention, as shown in fig. 3, optionally, the first control module 22 includes:

a first judging unit 32, configured to judge whether a predetermined service in a service sending direction jumps from an abnormal state to a normal state;

a first detecting unit 34, coupled to the first determining unit 32, configured to detect a first frame header signal of the first optical line data unit ODU when it is determined that the predetermined service hops from an abnormal state to a normal state;

a control unit 36, coupled to the first detecting unit 34, configured to, when a first frame header signal of the first ODU is detected, use the first frame header signal of the first ODU as first service layer service information, and control a data caching unit in a service sending direction in an OTN bearer architecture to reset.

Optionally, the control unit 36 is configured to: generating a first reset signal when a first frame header signal of the first ODU arrives; and sending the first reset signal to a data cache unit in the client side receiving direction in the service sending direction, and resetting the data cache unit in the client side receiving direction.

Optionally, the control unit 36 is further configured to: judging whether a lost signal of an ODU frame of a second ODU disappears, wherein the second ODU is an ODU with a lower order than the first ODU; under the condition that the loss signal of the ODU frame of the second ODU is judged to disappear, detecting a first frame header signal of the first ODU after the loss signal of the ODU frame of the second ODU disappears; generating a second reset signal when a first frame header signal of the first ODU arrives after a lost signal of an ODU frame of the second ODU disappears; and sending the second reset signal to the data buffer unit in the transmission direction of the line side, and resetting the data buffer unit in the transmission direction of the line side.

Fig. 4 is a block diagram of a structure of a reset control apparatus according to an embodiment of the present invention, as shown in fig. 4, optionally, the second control module 24 includes:

a second determining unit 42, configured to determine whether a loss signal of an ODU frame of a third ODU disappears;

a second detecting unit 44, coupled to the second determining unit 42, configured to detect a first frame header signal of a fourth ODU when it is determined that a lost signal of an ODU frame of the third ODU disappears, where the fourth ODU is an ODU higher in order than the third ODU;

a generating unit 46, coupled to the second detecting unit 44, configured to generate a third reset signal when the first frame header signal of the fourth ODU arrives;

the processing unit 48, coupled to the generating unit 46, is configured to send a third reset signal to the data buffering unit in the traffic receiving direction, so as to reset the data buffering unit in the traffic receiving direction.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

Reference will now be made in detail to the alternative embodiments of the present invention.

The optional embodiment of the present invention may be applied, but not limited to, in a high-bandwidth low-latency optical transmission network connecting a remote radio unit and a baseband unit (BBU), and the optional embodiment of the present invention provides a reset control method and apparatus. In the CPRI over OTN scheme, it is considered that CPRI has high requirements on delay performance and requires symmetry of transmission and reception. The OTN bearer mode also has its own drawbacks, and the delay stability is not very high, and the reset control method and apparatus provided in the optional embodiments of the present invention can achieve the effect of stable delay, so that the delay of the OTN device transmission reaches a stable value, thereby being able to meet the requirement of bearing CPRI service in the OTN device.

The method aims at the problem of unstable delay in OTN bearer service. The optional embodiment of the invention resets each part of the cache units processed in the OTN service step by step so as to ensure the stability of the delay of the service in the recovery process. Therefore, the requirement of the wireless equipment on the delay stability after the OTN equipment is accessed in the C-RAN architecture scheme is met.

Fig. 5 is a block diagram of a reset control apparatus according to an alternative embodiment of the present invention, which can be applied in an OTN progressive mapping system, as shown in fig. 5, and includes:

a client service detection module: for detecting whether the client side traffic is normal or not, and outputting an indication signal (clt _ lof) to the client side reception reset generation module, wherein the indication signal is a jump signal, and the jump signal is generated when the traffic is from abnormal to normal or from normal to abnormal.

The reset control signal extraction module: the signal is used as an input signal of a client receiving reset generation module, is from a downstream and is finally mapped to an ODU, and is a frame header signal of the ODU; if the mapping is two-level mapping, the signal is a frame header signal (hi _ ODU _ fp) of the higher-order ODU.

The client receives the reset and produces the module: for generating a reset signal (corresponding to the first reset signal) which resets the client receive data buffer unit and the client traffic to lower order ODU mapping buffer unit. This signal generation needs to satisfy two conditions: 1) and receiving the indication signal output by the detection module at the client side, and jumping from the service failure (equivalent to the abnormal state) to the normal service (equivalent to the normal state) after the indication signal. 2) And after the customer service is normal, waiting for the signal extracted by the reset control signal extraction module, and detecting that a first frame header indication signal of the reset control signal extraction module is effective. The reset signal is generated when the above two conditions are simultaneously satisfied.

A low-order ODU detection module: for detecting whether a low order ODU frame is lost, the output signal (lo _ ODU _ lof) changes from low to high if traffic is lost from normal to normal, and from high to low if lost to normal.

A line transmission reset generation module: and is configured to generate a control reset signal (equivalent to the second reset signal) to reset the lower-order ODU-to-higher-order ODU mapping buffer unit. The generation of the reset signal is controlled to generate a reset when the frame header indication signal (hi _ ODU _ fp) of the first high-order ODU is asserted after the falling edge of the low-order lo _ ODU _ lof signal.

The client sends the reset and produces the module: in the whole direction of demapping from the line side to the client side, the most serious data accumulation is the sending data buffer unit of the client port. After the output (lo _ ODU _ lof) signal of the low-order ODU detection module is changed from abnormal to normal, the reset signal (equivalent to the third reset signal) is generated when the first frame header (hi _ ODU _ fp) of the high-order ODU continues to arrive. The reset signal controls resetting of the data storage unit associated with the client transmit port.

In an optional embodiment of the present invention, the data storage unit in the receiving direction of the client side is reset first by a step-by-step reset method, then the data buffer unit in the sending direction of the line side is reset along the service flow direction, and finally the data storage unit in the sending side of the client side is reset along the service flow direction. The whole process resets the data cache unit of the cross-clock conversion from the client layer to the service layer according to the related information carried by the service layer service, and ensures that the data stored in all the data cache units in the whole service path is stabilized within a specified value, thereby solving the problem of the change of the data stored in the data cache units caused by clock fluctuation in the process of recovering after the service is disconnected. The method and the device of the invention ensure the delay stability on the whole data path, thereby meeting the requirement on the delay stability when the bearer network bears the wireless service.

In the process of carrying service transmission by the OTN device, mapping from the client service to the ODU service layer, or progressive mapping or skip mapping is generally involved, and here, the method of the optional embodiment of the present invention may be adopted to stabilize the delay of the entire data processing path, such as the mapping and demapping directions.

Fig. 6 is a flowchart of a reset control method according to an alternative embodiment of the present invention, and as shown in fig. 6, first, a customer service detection module detects a customer service to detect whether there is an abnormality in the service. If the service is abnormal, outputting a high level as an indication signal; if the service is normal, the high level flag signal is pulled down to become low level. And then sending the detection result to a next judgment selection module, judging an indication signal output by the previous stage, wherein the indication signal is always high level, which indicates that the service abnormality exists and does not disappear, continuously executing the service detection operation of the client at the moment until the service abnormality signal disappears, continuously executing the receiving reset of the client downwards, judging the service abnormality signal input at the upstream and the service layer service frame header signal, outputting a reset pulse signal of a period when the first service layer service frame header signal after the upstream service abnormality signal disappears, and resetting a data cache unit mapped from the client side to the service layer.

The reset control method and apparatus provided by alternative embodiments of the present invention are illustrated and described below with reference to alternative examples.

In an optional example one, a method and an apparatus for controlling reset of an OTN bearer CPRI2 service are provided, to implement stable delay of an OTN bearer CPRI2 service, fig. 7 is a structural block diagram of a reset control apparatus according to an optional example one of the present invention, as shown in fig. 7, the apparatus includes:

GXB: the high-speed serial client data is converted into parallel data through the high-speed serial interface, and a data clock is recovered.

Client receive first-in-first-out buffer (fifo): and converting the clock domain into fifo, and converting the data in the clock domain recovered by the client into the data in the local clock domain of the single board for subsequent processing.

odu0 mapping fifo: here, a data buffer unit for mapping cpri2 service to ODU0 loads client-side cpri2 service into payload according to the frame format of ODU 0.

Clt _ rx _ delay _ rst module: after the alarm of the customer reception service lof disappears, when the first frame header of the higher-order ODU2 arrives, a reset signal is generated.

odu 0-odu 2 map fifo: the fifo controls the data of the ODU0 to be buffered in the process of mapping to the ODU2 service.

Line _ tx _ delay _ rst: and a line side sends a reset module, which is used for detecting according to the overhead of the low-order ODU0, after the loss of the ODU0 frame is recovered to normal, waiting for the arrival of a first frame header indication signal of the ODU2, generating a reset signal, and performing reset operation on the mapping module from the ODU0 to the ODU 2.

OTU2_ tx: and the OTU2 framing module packages the ODU2 data into an OTU2 format, and simultaneously converts the data into a line side transmission clock domain and sends the data to a downstream module.

SFI4.2 interface: and the high-speed interface of the parallel-serial conversion carries out high-speed transmission on the line side.

OTU2_ rx: and performing bit width conversion and framing on the data received by the parallel interface, and outputting an OTU2 frame.

ODU2 to ODU0 demapping fifo ODU2 traffic to ODU0 demapping data cache fifo.

odu0 overhead: and performing framing and related overhead detection processing on the ODU0 data subjected to demapping and decoding, and outputting an ODU0 frame loss lof/oof signal.

odu0 to customer service demapping fifo: and solving a data buffer unit of the client service from the ODU0 service.

The client sends fifo: and converting fifo from the client service to the clock domain between the high-speed interfaces to realize the clock domain switching of the client data.

Clt _ tx _ delay _ rst: the client sending side delayed reset control module performs reset operation on two data cache fifo in the client sending direction when waiting for the first frame header of the OTU2 to arrive after an ODU0 lost signal output according to the overhead of the upstream ODU0 disappears, so that the water level of the client sending side is maintained at an ideal waterline.

The reset operation is carried out according to the service processing flow, and the whole service mapping direction controls reset according to the client side state and the frame header of the high-order ODU mapped finally; and the service demapping direction controls resetting according to the state of the lower-order ODU and a frame header signal of the higher-order ODU. The resetting process is carried out step by step, and the receiver sends the direction to the receiver first, so that the ideal effect can be finally realized.

Fig. 8 is a flowchart of a reset control method according to an alternative example of the present invention, as shown in fig. 8, the flowchart including:

a client reception section:

step S802, detecting whether the client service reception is normal.

Step S804, if the client service jumps from abnormal to normal, step S806 is performed to detect a frame header signal of the ODU 2; if the customer service is not normal, the process jumps to step S802 to continue the detection.

Step S806, after the service is normal, detects a first frame header of the ODU2, and generates a first reset signal when the first frame header of the ODU2 comes.

Step S808 resets the fifo received by the client.

A line transmission section:

step S812, detecting whether the ODU0 frame is normal.

Step S814, if the ODU0 frame is lost, return to step S812 to continue detection; if the ODU0 frame loss signal disappears, the operation proceeds to step S816.

Step S816 is to detect a first frame header signal of the ODU2 when the ODU0 frame loss signal disappears, and generate a reset signal after the detection.

Step S818, resets mapping fifo of the ODU0 to the ODU 2.

A client transmission section:

step S822, detecting whether the ODU0 frame decoded by demapping is correct when the client sending side is upward.

Step S824, if the ODU0 frame is incorrect, the process continues to return to step S822 for detection; if the ODU0 service is lost from the frame to normal, the operation jumps to step S826.

Step S826, after the service of the ODU0 is normal, detecting a frame header signal of the ODU2, and generating a reset pulse when a first frame header comes.

In step S828, fifo in the client transmission direction is reset.

In an alternative example two, a method and an apparatus for reset control when an OTN carries SDH traffic are provided, fig. 9 is a block diagram of a structure of a reset control apparatus according to the alternative example two of the present invention, as shown in fig. 9, the apparatus includes:

client receive data buffer unit (clock domain conversion fifo): when the traffic flow is delayed, the traffic enters the high-speed serial interface from the external optical fiber and is converted into low-speed data for processing, and the clock generally recovered at this point is different from the clock for subsequent OTN mapping processing, so that a data cache unit is required to perform clock domain conversion, and if the data cache unit is not well controlled, the storage capacity is different after each power-off or service disconnection, thereby affecting the delay change of the whole data path.

A client service to ODUk mapping module: the module has the main function of controlling mapping of previously converted customer service data to a corresponding ODUk according to an OTN related standard, and then uniformly encapsulating the customer service data into a standard OTU upper line side transmission, in this example, customer service stm-4 is asynchronously mapped to ODU1_ TS first, and then ODU1 is converted into an OTU1 frame and then is transmitted on the line side after being converted by a high-speed serial interface.

Demapping ODUk to client traffic: for the reverse process of the mapping module, the payload data mapped into the ODUk is demapped, here, stm-4 traffic is demapped from the ODU1_ ts.

The client sending direction data caching unit: and performing clock domain conversion on the demapped stm-4 service data, converting the demapped stm-4 service data into a client service clock domain, and recovering the service data to a client port optical fiber for transmission through a high-speed serial interface.

In addition to the above modules, the apparatus further comprises:

control delay reset module 1(delay _ rst _ 1): the module is applied to a service sending direction, an access signal is controlled by an upstream service monitoring signal and a downstream ODU1 service frame header signal to be mapped together, when the upstream monitoring signal monitors that a service is changed from invalid to valid, a valid signal is generated, and when the valid signal is sent according to a first frame header of a downstream ODU1, a reset signal (RST1) is controlled to perform reset operation on two data cache units (fifo) at a client receiving side, so that the data depth of the cache units is controlled to be kept stable, and the purpose of stabilizing the delay of the part is achieved.

Control delay reset module 2(delay _ rst _ 2): the module is applied to a service receiving direction, generates a pulse when waiting for an OTU1 frame header, and resets a cache unit (fifo) of a client sending part, so that the storage condition of a path cache unit of the receiving direction reaches a stable state, and finally the aim of delaying and stabilizing the part is fulfilled.

The two reset modules can be flexibly applied near a data cache unit of the whole data path respectively, and are controlled to reset from the upstream sending direction of the service flow according to signals which can cause the data depth of the storage unit in the upstream and downstream service flow directions, and then reset the data storage unit in the receiving direction according to the service flow direction, so that the aim of resetting the service step by step is fulfilled, and finally the water level of the data storage unit of the whole data path is in a stable state, thereby ensuring the delay stability in the whole client service transmission process.

In an alternative example ii, a flowchart of a reset control method is further provided, where the flowchart of the method includes the following steps:

the first step is as follows: and controlling the data storage unit in the sending direction to reset according to the service flow direction and the service mapping process.

The second step is that: controlling the data storage unit to reset in the service receiving direction corresponding to the sending direction

In an alternative example three, a method and an apparatus for reset control when an OTN carries GE traffic are provided, fig. 10 is a structural block diagram of a reset control apparatus according to the alternative example three of the present invention, as shown in fig. 10, the apparatus includes:

receiving a clock domain and a bit width conversion unit: clock domain conversion and bit width conversion fifo or data storage unit, in order to buffer some data in the data processing process.

GFP-T encapsulation, ODU0 framing: after GFP-T encapsulation, GE data from a client side is mapped into an ODU0, and at the moment, the data is continuously transmitted in the frame structure of an ODU 0.

ODU1 framing and packaging to OTU 1: the ODU0 is mapped to the ODU1, which includes a data buffer unit used in conversion and framing and clock domain conversion fifo required in framing of the OTU 1.

Demapping ODU1 to ODU 0: including the clock domain conversion unit of OTU1 to ODU1 and the ODU1 to ODU0 demapping unit, the data storage unit is also involved here, but here the storage data is very small and the water level is very stable.

GFP-T decapsulation: and solving the GFP-T format encapsulated data into client side data.

A transmitting bit width and clock domain conversion unit: and decapsulating the required bit width conversion data storage unit and the clock domain conversion unit.

In addition to the above modules, the apparatus further includes the following reset control section:

control delay reset module 1(delay _ rst _ 1): according to whether a service loss alarm output by a service performance monitoring module accessed by a client side is lost or not, a reset signal (rst1) is generated when waiting for a first frame header signal after the alarm disappears, wherein the frame header signal is a frame header signal to be finally mapped to an ODU1 frame structure by the client service, and because the client service needs to be loaded into a payload in the ODU1 frame structure, a section of part which does not need to be filled is arranged at the head position of the ODU1 frame, the reset is controlled at the vacancy.

Control delay reset module 2(delay _ rst _ 2): the module is applied to the process of mapping ODU0 to ODU1, and is similar to the control delay resetting module 1, where the ODU0 is mapped to the ODU1 as payload data, and when it is monitored that the ODU0 service is in failure to normal service, a resetting signal is generated when a first frame header of a subsequent ODU1 is waited for, and a resetting operation is performed on a storage unit in the process of mapping ODU0 to ODU1, so that the water level of the storage unit is stable.

Control delay reset module 3(delay _ rst _ 3): the module is applied to a downstream module, and according to monitoring of the demapped ODU0, after an ODU0 service is lost from service to service restoration, a reset signal is generated when a first frame header of an ODU1 is waited for, and a service storage unit (client transmission port fifo) related to the downstream is reset, so that the fifo reaches an ideal water level which we want.

the first step is as follows: according to the traffic flow, firstly, at the client receiving port, the data storage unit of the next stage is controlled to reset according to the related signal of the next stage mapping, and the reset is executed firstly in time. The water level of the data storage unit storing the available service can be kept to be in an ideal stable state.

The second step is that: and resetting the related data storage unit of the next-level mapping, so that the water level of the part of the related service data storage unit is stabilized to an ideal state.

The third step: the reset operation of the previous stage may affect the next stage along the service flow direction, when the service is transmitted to the receiving direction, the ODU0 fails, when the ODU0 fails, the reset operation is performed after waiting for the first frame header of the ODU1, and the subsequent fifo buffer unit is reset, so that the water level of the part of the data buffer unit is kept near the ideal water level, thereby achieving the effect of stable water level of the data buffer unit of the whole path, and finally achieving the effect of stable delay after each service change or failure.

In summary, the reset control method and apparatus provided in the embodiments and optional embodiments of the present invention control the data storage unit of the receiving part of the client side to reset in a step-by-step reset manner, and then control the data buffer unit in the sending direction of the line side to reset along the traffic flow, and finally control the data storage unit in the sending side of the client to reset along the traffic flow. The whole process resets the data cache unit of the cross-clock conversion from the client layer to the service layer according to the related information carried by the service layer service, and ensures that the data stored in all the data cache units in the whole service path is stabilized within a specified value, thereby solving the problem of the change of the data stored in the data cache units caused by clock fluctuation in the process of recovering after the service is disconnected. The delay stability on the whole data path is ensured, so that the requirement on the delay stability when the bearer network bears the wireless service is met.

The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and a person skilled in the art can modify the technical solution of the present invention or substitute the same without departing from the spirit and scope of the present invention, and the scope of the present invention should be determined by the claims.

Example 3

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s1, controlling the data buffer unit in the service sending direction in the OTN bearing framework to reset according to the first service layer service information;

and S2, controlling the data buffer unit in the service receiving direction in the OTN bearing architecture to reset according to the service information of the second service layer.

Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Optionally, in this embodiment, the processor executes the method steps described in the above embodiments according to the program code stored in the storage medium.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reset control method, comprising:

controlling the resetting of a data cache unit in a service sending direction in an OTN bearing framework of an optical transmission network according to the service information of a first service layer;

and controlling the data cache unit in the service receiving direction in the OTN bearing framework to reset according to the service information of the second service layer.

2. The method according to claim 1, wherein controlling the resetting of the data buffering unit in the traffic sending direction in the OTN bearer architecture according to the first service layer traffic information comprises:

judging whether the preset service in the service sending direction jumps from an abnormal state to a normal state;

detecting a first frame header signal of a first optical line data unit ODU when it is determined that the predetermined service hops from the abnormal state to the normal state;

and when detecting the first frame header signal of the first ODU, taking the first frame header signal of the first ODU as the service information of the first service layer, and controlling a data cache unit in the service sending direction in the OTN bearer architecture to be reset.

3. The method according to claim 2, wherein taking a first frame header signal of the first ODU as the first service layer service information, and controlling a data buffer unit in the service sending direction in an OTN bearer architecture to reset includes:

generating a first reset signal when a first frame header signal of the first ODU arrives;

and sending the first reset signal to a data cache unit in a client side receiving direction in the service sending direction, and resetting the data cache unit in the client side receiving direction.

4. The method of claim 3, wherein after sending the first reset signal to the data buffer unit in the client-side receiving direction in the traffic sending direction and resetting the data buffer unit in the client-side receiving direction, the method further comprises:

judging whether a lost signal of an ODU frame of a second ODU disappears, where the second ODU is an ODU of a lower order than the first ODU;

detecting a first frame header signal of the first ODU after the loss signal of the ODU frame of the second ODU disappears, when it is determined that the loss signal of the ODU frame of the second ODU disappears;

generating a second reset signal when the first frame header signal of the first ODU arrives after the loss signal of the ODU frame of the second ODU disappears;

and sending the second reset signal to a data cache unit in the transmission direction of the line side, and resetting the data cache unit in the transmission direction of the line side.

5. The method according to any of claims 1 to 4, wherein controlling the resetting of the data buffering unit in the traffic receiving direction in the OTN bearer architecture according to the second service layer traffic information comprises:

judging whether a lost signal of an ODU frame of a third ODU disappears;

detecting a first frame header signal of a fourth ODU when it is determined that the missing signal of the ODU frame of the third ODU disappears, where the fourth ODU is an ODU higher in order than the third ODU;

generating a third reset signal when a first frame header signal of the fourth ODU arrives;

and sending the third reset signal to the data cache unit in the service receiving direction to reset the data cache unit in the service receiving direction.

6. A reset control apparatus, comprising:

the first control module is used for controlling the resetting of the data cache unit in the service sending direction in the OTN bearing framework according to the first service layer service information;

and the second control module is used for controlling the resetting of the data cache unit in the service receiving direction in the OTN bearing framework according to the service information of the second service layer.

7. The apparatus of claim 6, wherein the first control module comprises:

a first judging unit, configured to judge whether a predetermined service in the service sending direction jumps from an abnormal state to a normal state;

a first detecting unit, configured to detect a first frame header signal of a first optical line data unit ODU when it is determined that the predetermined service hops from the abnormal state to the normal state;

a control unit, configured to, when a first frame header signal of the first ODU is detected, use the first frame header signal of the first ODU as the first service layer service information, and control a data cache unit in the service sending direction in the OTN bearer architecture to reset.

8. The apparatus of claim 7, wherein the control unit is configured to:

9. The apparatus of claim 8, wherein the control unit is further configured to:

10. The apparatus of any of claims 6 to 9, wherein the second control module comprises:

a second determining unit, configured to determine whether a loss signal of an ODU frame of a third ODU disappears;

a second detecting unit, configured to detect a first frame header signal of a fourth ODU when it is determined that a loss signal of an ODU frame of the third ODU disappears, where the fourth ODU is an ODU higher in order than the third ODU;

a generating unit, configured to generate a third reset signal when a first frame header signal of the fourth ODU arrives;

and the processing unit is used for sending the third reset signal to the data cache unit in the service receiving direction to reset the data cache unit in the service receiving direction.