WO2013082813A1

WO2013082813A1 - Bandwidth resource management method, system, and device

Info

Publication number: WO2013082813A1
Application number: PCT/CN2011/083775
Authority: WO
Inventors: 徐贵今; 赵泉波; 张利
Original assignee: 华为技术有限公司
Priority date: 2011-12-09
Filing date: 2011-12-09
Publication date: 2013-06-13
Also published as: CN102549952A

Abstract

Disclosed is a bandwidth resource management method, comprising: obtaining bandwidth resource information of a coaxial channel between an optical electronic converter (OEC) and a coaxial network unit (CNU); sending the bandwidth resource information of the coaxial channel to an optical line terminal (OLT); receiving coaxial channel bandwidth allocation indication information delivered by the OLT according to the bandwidth resource information of the coaxial channel; and providing the CNU with a coaxial channel bandwidth according to the coaxial channel bandwidth allocation indication information. Also disclosed are a bandwidth resource management system and device.

Description

Bandwidth resource management method, system and device

Technical field

The present invention relates to communication technologies, and in particular, to a bandwidth resource management method, system and apparatus. Background technique

FTTB (Fiber To The Building) and FTTC (Fiber to The Curb) are the mainstream access methods for meeting the high-bandwidth service needs of users in the communications field. The network architecture applicable to the FTTC/B access mode is shown in Figure 1. Among them, an optical network is between the OLT (Optical Line Terminal) and the OEC (Optical Electronic Converter), and a coaxial network is between the OEC and the Coaxial Network Unit (CNU).

The optical network and the coaxial network communicate with each other through OEC. The OLT sends the service from the SNI (Service Node Interface) to the OEC through the optical network in the form of an optical signal. The OEC terminates the service and transforms the service into an electrical signal suitable for transmission on the coaxial network and sends it to each CNU.

In the prior art, the OLT is responsible for the first-level bandwidth resource scheduling of the optical network, and the OEC is located.

The CLT (Coaxial Line Terminal) is responsible for the second-level bandwidth resource scheduling of the coaxial network. The optical bandwidth resource management mechanism of the OLT is terminated at the CLT, and the CLT and each CNU implement bandwidth resource management of the coaxial network through mutually recognized coaxial medium resource management. However, the system bandwidth resource management level of the above solution is too large, which will result in low efficiency and high cost of operation and maintenance of the system. Summary of the invention

The embodiments of the present invention provide a bandwidth resource management method, system, and device, which are designed to improve system operation and maintenance management efficiency and operation and maintenance management cost.

A bandwidth resource management method according to an embodiment of the present invention includes: acquiring bandwidth resource information of a coaxial channel between a photoelectric converter OEC and a coaxial network unit CNU; and using bandwidth information of the coaxial channel Sending to the optical line terminal OLT; receiving the coaxial channel bandwidth allocation indication information sent by the OLT according to the bandwidth resource information of the coaxial channel; providing the same information to the CNU according to the coaxial channel bandwidth allocation indication information Axis channel bandwidth.

A bandwidth resource management system according to an embodiment of the present invention includes: an optical line terminal OLT, at least one photoelectric converter OEC, and a plurality of coaxial network units CNU, wherein the OLT passes the OEC to point Connecting to the plurality of CNUs in a multi-point manner, the OLT and the OEC are communicated by using a fiber channel, and the OEC and the CNU are communicated by using a coaxial channel; the OEC is used for acquiring Bandwidth of the coaxial channel Source information, the bandwidth resource information of the coaxial channel is sent to the OLT, and the coaxial channel bandwidth allocation indication information sent by the OLT is received, and the coaxial channel bandwidth allocation indication information is used as the CNU Providing a coaxial channel bandwidth; the OLT, configured to send the coaxial channel bandwidth allocation indication information to the OEC according to the bandwidth resource information of the coaxial channel sent by the OEC.

An embodiment of the present invention further provides an access device, including: a coaxial channel bandwidth resource information acquiring module, a sending module, a receiving module, and a coaxial channel bandwidth providing module; a module, configured to acquire bandwidth resource information of a coaxial channel between the access device and a coaxial network unit CNU; the sending module, configured to send the coaxial channel bandwidth resource information to an optical line terminal OLT; The receiving module is configured to receive coaxial channel bandwidth allocation indication information that is sent by the OLT according to the coaxial channel bandwidth resource information, where the coaxial channel bandwidth providing module is configured to use the coaxial channel The bandwidth allocation indication information provides the CNU with a coaxial channel bandwidth.

The method, the system and the device for managing the bandwidth resource provided by the foregoing embodiment of the present invention, by reporting the bandwidth resource information of the coaxial channel to the OLT, and the OLT directly allocates the bandwidth of the coaxial channel bandwidth, thereby reducing the OLT to transport the CNU. The level of the dimension management mechanism improves the operation and maintenance management efficiency of the system and reduces the cost of operation and maintenance management. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings which are required in the embodiments or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only present. The technical description and some embodiments of the present invention can be obtained by those skilled in the art from the drawings without any inventive effort.

1 is a schematic diagram of a network system to which a bandwidth resource management method is applied according to an embodiment of the present invention; FIG. 2 is a flowchart of a method for managing a bandwidth resource according to an embodiment of the present invention;

FIG. 3 is a flowchart of downlink bandwidth resource management according to an embodiment of the present invention;

4 is a flowchart of uplink bandwidth resource management according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an access device according to an embodiment of the present invention. detailed description

The technical solutions of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention and not all embodiments. Other embodiments obtained by those of ordinary skill in the art without inventive efforts are within the scope of the invention. The embodiment of the present invention provides a bandwidth resource management method, where the bandwidth resource management method can be applied to an optical fiber/coaxial hybrid access system, such as the FTTC/B system shown in FIG. 1, where the optical line terminal OLT passes through the optical system. The converter OEC connects a plurality of coaxial network elements CNU in a point-to-multipoint manner. The optical network between the OLT and the OEC is an optical transmission medium based on an optical transmission medium, which is also called an optical medium area, and is communicated by using a fiber channel. The OEC and the CNU are coaxial networks based on a copper transmission medium. It is called a copper medium area and communicates with a coaxial channel. In a specific embodiment, the OLT may connect a plurality of OECs through a fiber optic network, and further connect to the CNUs of the respective coaxial networks through the plurality of OECs. To communicate on the coaxial channel, it is necessary to first obtain the bandwidth resource information on the coaxial channel by means of channel measurement, bit loading, etc., and then allocate the appropriate coaxial channel bandwidth to the coaxial channel to improve the information transmission efficiency of the coaxial channel. The bandwidth resource management method provided by the embodiment of the present invention performs channel measurement and bit loading on the coaxial channel between the EOC and the CNU before performing normal service communication between the optical fiber network and the coaxial network, and acquiring the coaxial channel. Based on the bandwidth resource information, the OLT performs bandwidth resource management on the CNU according to the bandwidth resource information, thereby reducing the management level of the bandwidth resource, improving the efficiency of system operation and maintenance management, and improving the communication efficiency of the coaxial channel.

The method for communicating the passive optical network and the coaxial network according to the embodiment of the present invention includes: the OEC acquiring the bandwidth resource information of the coaxial channel, and transmitting the bandwidth resource information of the coaxial channel to the OLT, and the OLT The Fibre Channel between the OECs performs bandwidth allocation, and delivers bandwidth allocation indication information of the coaxial channel to the OEC. The OEC provides coaxial channel bandwidth for the CNU according to the bandwidth allocation indication information of the coaxial channel.

Specifically, a method for communicating a passive optical network and a coaxial network according to an embodiment of the present invention, as shown in FIG. 2, includes:

Step 201: The OEC acquires bandwidth resource information of a coaxial channel between the OEC and the CNU.

Specifically, the OEC can obtain the bandwidth resource information of the coaxial channel by performing channel measurement, bit loading, and the like with the CNU. The bandwidth information resource information may include a number of subchannels and a bandwidth resource of each subchannel.

Step 202: The OEC sends the coaxial channel bandwidth resource information to the OLT.

Step 203: When the CNU requests a certain service from the OEC, the OEC sends the bandwidth information required for performing the service on the coaxial channel to the OLT.

Step 204: The OLT allocates bandwidth to the Fibre Channel between the OEC and the OEC, and sends the coaxial channel bandwidth allocation indication information to the OEC.

When the CNU requests the downlink service, the OLT may perform bandwidth allocation on the coaxial channel according to the bandwidth required by the downlink service and the coaxial bandwidth resource information reported by the OEC, and allocate bandwidth indication information of the coaxial channel. Send to OEC. If the OLT wants to perform such things as QoS (Quality of Service) on the CNU Dimensional management, then the OLT can allocate bandwidth to the coaxial channel according to the bandwidth occupied by the relevant QoS mechanism, the bandwidth occupied by the downlink service, and the coaxial bandwidth resource information reported by the OEC, and the coaxial The final bandwidth allocation indication information of the channel is sent to the OEC.

When the CNU requests the uplink service, the OEC sends the uplink bandwidth request to the OLT. The OLT sends the coaxial channel bandwidth allocation indication information to the OEC according to the bandwidth of the uplink service application and the coaxial bandwidth resource information reported by the OEC to the OLT. Specifically, the OLT calculates the bandwidth allocation indication information of the coaxial channel by using a DBA (Dynamic Band Allocation) algorithm according to the bandwidth of the uplink service bandwidth application and the coaxial bandwidth resource information reported by the OEC, and the same The axis channel bandwidth allocation indication information is sent to the OEC through a GATE message.

Step 205: The OEC provides a coaxial channel bandwidth for the CNU according to the coaxial channel bandwidth allocation indication information, so that the CNU performs corresponding services.

In order to better understand the bandwidth resource management method provided by the embodiment of the present invention, the following describes an EPO over Coaxial Distribution Network (EPON over Coaxial Distribution Network) system as a specific application example, and the EPOC system can also be used. The network architecture shown in FIG. 1 is used, wherein the optical fiber network between the OLT and the OEC is an Ethernet passive optical network EPON, and the OEC and the CNU are coaxial networks. The bandwidth resource management method provided by the embodiment of the present invention, as shown in FIG. 3, includes:

Step 301: The OLT and the OEC complete the ranging and synchronization of the Fibre Channel by using an EPON (Ethernet over Passive Optical Network) PHY (Physical Layer) and an EPON MAC (Media Access Control). .

Among them, the functional modules of the OLT are the same as those specified by the EPON standard, and the PHY module of the OEC is also the same as that specified by the EPON standard. Here, the OEC's MAC can be simplified to a proxy MAC, the Agent MAC, which can implement basic functions such as ranging and allocation of Fibre Channel bandwidth resources. OEC's COX (Coaxial, Coaxial) PHY can use the QAM (Quadature Amplitude Modulation) demodulation mechanism currently used in the DOCSIS (Data Over Cable Service Interface Specification) standard or other For example, the HomePlugAV standard (HomePlugAV) standard OFDM (Orthogonal Frequency Division Multiplexing) modulation and demodulation mechanism, the OEC MAC can be a simplification of the DOCSIS MAC, such as only retaining DOCSIS or Channel measurements in the HomePlugAV standard and parts that are closely related to the channel.

In step 302, the OEC and the CNU use the COX PHY and the COX MAC to obtain the available bandwidth resource information of the coaxial channel.

OEC and CNU use COX PHY and COX MAC to complete channel measurement and bit allocation of coaxial channels. Obtain the available bandwidth resource information of the coaxial channel.

Step 303: The OEC sends the coaxial channel bandwidth resource information to the OLT by using the proxy MAC.

Through the above steps, the OLT has obtained the bandwidth resource information of the coaxial channel. In the following two cases, the next service and the uplink service further explain how the OLT uniformly manages the bandwidth resource of the CNU.

For downlink business A:

Step 304: When the CNU requests the downlink service A from the OEC, the OEC sends the bandwidth information required for the downlink service A on the coaxial channel to the OLT.

Step 305: The OLT and the OEC complete Dynamic Band Allocation (DBA), including bandwidth resource allocation for the Fibre Channel and the coaxial signal, and send the DBA information indicating the bandwidth allocation of the coaxial channel to the OEC through the GATE message.

The DBA performed by the OLT and the OEC completes the bandwidth resource allocation for the Fibre Channel and the coaxial channel according to the communication bandwidth requirement of the downlink service A, the Fibre Channel bandwidth resource information, and the coaxial channel bandwidth resource information. Step 306: The OEC translates the DBA information obtained from the proxy MAC into the coaxial channel bandwidth allocation indication information, and provides the CNU with the coaxial channel bandwidth for performing the downlink service A according to the coaxial channel bandwidth allocation indication information.

Step 307: The OLT and the CNU perform the communication of the service A according to the bandwidth allocated to the Fibre Channel and the coaxial channel respectively.

For the uplink service A', as shown in Figure 4:

Step 304-1: When the CNU requests the uplink service A' from the OEC, the EPON MAC of the CNU sends a message requesting the OLT to allocate the bandwidth required for the uplink service A' on the coaxial channel to the OEC.

Step 305 -1, the OEC forwards the message requesting the OLT to the EPON DBA of the OLT for the bandwidth required for the uplink service A' on the coaxial channel.

Step 306 -1, the EPON DBA in the OLT performs bandwidth allocation on the Fibre Channel and the coaxial channel, and sends the DBA information indicating the bandwidth allocation of the coaxial channel to the proxy MAC of the OEC through the GATE message.

The EPON DBA in the OLT can allocate bandwidth to the Fibre Channel and the Coax channel according to the bandwidth resource information of the Fibre Channel and the bandwidth resource information of the Coax channel.

Step 307 -1, the OEC translates the DBA information obtained from the proxy MAC into a coaxial channel bandwidth allocation indication information, and provides the CNU with the coaxial channel bandwidth for performing the uplink service A' according to the coaxial channel bandwidth allocation indication information.

Step 308: The CNU sends an uplink service A' to communicate with the OLT according to the allocated coaxial channel bandwidth and the fiber channel bandwidth. The foregoing is a method for communication between a passive optical network and a coaxial network according to an embodiment of the present invention. When the bandwidth resource information of the coaxial channel is reported to the OLT, the OLT directly allocates bandwidth to the bandwidth of the optical channel and the coaxial channel. The OLT uniformly manages the bandwidth resources of the CNU, thereby reducing the level of the OLT's bandwidth resource management mechanism for the CNU, improving the efficiency of system operation and maintenance management, reducing the cost of operation and maintenance management, and improving the communication efficiency of the coaxial channel.

Based on the method for the passive optical network and the coaxial network communication provided by the above embodiments, the embodiment of the present invention further provides a bandwidth resource management system, where the system may be a fiber/coaxial hybrid access system, The network architecture shown in Figure 1.

Specifically, the bandwidth resource management system provided by the embodiment of the present invention includes an optical line terminal OLT, a photoelectric converter OEC, and a coaxial network unit CNU, wherein the OLT connects multiple CNUs in a point-to-multipoint manner through OEC. The optical channel is communicated between the OLT and the OEC, and the coaxial channel is used for communication between the OEC and the CNU.

The OEC is configured to acquire bandwidth resource information of the coaxial channel, send the coaxial channel bandwidth resource information, and bandwidth information required by the CNU request to the OLT, and receive the OLT. The issued coaxial channel bandwidth allocation indication information provides a coaxial channel bandwidth for the CNU according to the coaxial channel bandwidth allocation indication information.

The OLT is configured to perform bandwidth allocation on the Fibre Channel and the coaxial channel according to the coaxial channel bandwidth resource information sent by the OEC and the bandwidth information required by the CNU request, and the coaxial channel The bandwidth allocation indication information is sent to the OEC.

The CNU is configured to cooperate with the OEC to complete the acquisition of the coaxial channel bandwidth resource information, and perform corresponding services according to the coaxial channel bandwidth provided by the OEC.

The coaxial channel bandwidth resource information includes a number of subchannels and a bandwidth of each subchannel, and the coaxial channel bandwidth resource information is that the optoelectronic converter and the coaxial network unit pass through a coaxial physical layer and a coaxial medium. The access control layer performs channel measurement and bit allocation task acquisition; the OEC sends the coaxial channel bandwidth resource information to the optical line terminal through the proxy media access control layer. For a specific application, other working processes of the bandwidth resource management system may refer to the specific description of the foregoing bandwidth resource management method.

It can be seen from the above that the bandwidth resource management system provided by the embodiment of the present invention can implement the bandwidth resource management of the CNU by the OLT, reduce the OLT's bandwidth resource management mechanism for the CNU, and improve the efficiency and reduce the system operation and maintenance management. Operation and maintenance management costs, and thus improve the communication efficiency of the coaxial channel.

The embodiment of the present invention further provides an access method based on the bandwidth resource management method and system provided by the foregoing embodiment. The device may be located at the edge of the optical fiber network and the coaxial network of the fiber/coaxial hybrid access system, and set the OEC described in the foregoing embodiment to implement bandwidth resource management. As shown in FIG. 5, the access device provided by the embodiment of the present invention includes a coaxial channel bandwidth resource information acquiring module 501, a sending module 502, a receiving module 503, and a coaxial channel bandwidth providing module 504.

The coaxial channel bandwidth resource information acquiring module 501 is configured to acquire bandwidth resource information of the coaxial channel between the access device and the CNU;

The sending module 502 is configured to send, to the OLT, the coaxial channel bandwidth resource information and bandwidth information required by the CNU to request a service;

The receiving module 503 is configured to receive, by the OLT, the coaxial channel bandwidth allocation indication information that is sent by the OLT according to the coaxial channel bandwidth resource information and the bandwidth information required for the service performed by the CNU request.

The coaxial channel bandwidth providing module 504 is configured to provide the CNU with a coaxial channel bandwidth according to the coaxial channel bandwidth allocation indication information.

The coaxial channel bandwidth resource information includes a number of subchannels and a bandwidth of each subchannel, and the coaxial channel bandwidth resource information is a coaxial physical layer and a same on the coaxial channel bandwidth resource information acquiring module. The axis media access control layer performs channel measurement and bit allocation task acquisition; the sending module 502 sends the coaxial channel bandwidth resource information through the proxy media access control layer.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary hardware platform, and of course, all can be implemented by hardware. Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM, a magnetic disk, an optical disk, or the like. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope of the present disclosure. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

Rights request

A bandwidth resource management method, comprising:

Obtaining bandwidth resource information of the coaxial channel between the photoelectric converter OEC and the coaxial network unit CNU; transmitting the bandwidth resource information of the coaxial channel to the optical line terminal OLT;

And receiving, by the OLT, a coaxial channel bandwidth allocation indication information that is sent according to the bandwidth resource information of the coaxial channel;

And providing a coaxial channel bandwidth to the CNU according to the coaxial channel bandwidth allocation indication information.

2. The bandwidth resource management method according to claim 1, wherein the bandwidth resource information of the coaxial channel comprises a number of subchannels of the coaxial channel and a bandwidth resource of each subchannel.

The bandwidth resource management method according to claim 1, wherein the media access control layer MAC of the OEC is configured as a proxy MAC, and the transmitting bandwidth resource information of the coaxial channel to the OLT includes Transmitting, by the proxy MAC, bandwidth resource information of the coaxial channel to the OLT.

The bandwidth resource management method according to claim 3, wherein the coaxial physical layer PHY of the OEC uses a quadrature amplitude modulation or an orthogonal frequency division multiplexing modulation and demodulation mechanism;

The coaxial media access control layer MAC of the OEC includes channel measurement content in a wired transmission data interface service specification DOCSIS or a home plug-in alliance voice video standard HomePlugAV.

The bandwidth resource management method according to claim 1, further comprising:

The OEC sends the bandwidth information required by the CNU request for the service to the OLT;

The OLT performs a fiber channel between the OLT and the OEC and between the OEC and the CNU according to the bandwidth resource information of the coaxial channel and the bandwidth information required for the service performed by the CNU request. Bandwidth allocation of the coaxial channel;

The OLT sends the coaxial channel bandwidth allocation indication information to the OEC.

A bandwidth resource management system, comprising: an optical line terminal OLT, at least one photoelectric converter OEC, and a plurality of coaxial network units CNU, wherein the OLT passes the OEC at a point-to-multipoint basis Connecting to the plurality of CNUs, the OLT and the OEC use a Fibre Channel to communicate, and the OEC and the CNU communicate with each other by using a coaxial channel;

The OEC is configured to obtain the bandwidth resource information of the coaxial channel, and send the bandwidth resource information of the coaxial channel to the OLT, and receive the coaxial channel bandwidth allocation indication information sent by the OLT, according to the The coaxial channel bandwidth allocation indication information provides a coaxial channel bandwidth for the CNU; The OLT is configured to send the coaxial channel bandwidth allocation indication information to the OEC according to the bandwidth resource information of the coaxial channel sent by the OEC.

The bandwidth resource management system according to claim 6, wherein the bandwidth resource information of the coaxial channel includes a number of subchannels of the coaxial channel and bandwidth resources of each subchannel, and the coaxial The bandwidth resource information of the channel is obtained by channel measurement and bit allocation between the OEC and the CNU through the coaxial physical layer PHY and the coaxial medium access control layer MAC.

8. The bandwidth resource management system according to claim 6, wherein the media access control layer MAC of the OEC is configured as a proxy MAC, and the OEC uses the proxy MAC to bandwidth the coaxial channel. Resource information is sent to the OLT.

The bandwidth resource management system according to claim 8, wherein the coaxial PHY of the OEC uses a quadrature amplitude modulation or an orthogonal frequency division multiplexing modulation and demodulation mechanism;

The coaxial MAC address of the OEC includes channel measurement content in the Wired Transmission Data Interface Service Specification DOCSIS or the Home Plug-in Alliance voice video standard HomePlugAV.

The bandwidth resource management system according to claim 6, wherein the OEC is further configured to send bandwidth information required for the service requested by the CNU to the OLT;

The OLT is further configured to perform a Fibre Channel between the OLT and the OEC, and the OEC and the foregoing according to bandwidth resource information of the coaxial channel and bandwidth information required for a service performed by the CNU request. The bandwidth allocation of the coaxial channel between the CNUs obtains the coaxial channel bandwidth allocation indication information.

An access device, comprising: a coaxial channel bandwidth resource information acquiring module, a sending module, a receiving module, and a coaxial channel bandwidth providing module;

The coaxial channel bandwidth resource information acquiring module is configured to acquire bandwidth resource information of a coaxial channel between the access device and the coaxial network unit CNU;

The sending module is configured to send the coaxial channel bandwidth resource information to the optical line terminal OLT;

The receiving module is configured to receive the coaxial channel bandwidth allocation indication information that is sent by the OLT according to the coaxial channel bandwidth resource information;

The coaxial channel bandwidth providing module is configured to provide a coaxial channel bandwidth to the CNU according to the coaxial channel bandwidth allocation indication information.

The access device according to claim 11, wherein the bandwidth resource information of the coaxial channel includes a number of subchannels of the coaxial channel and bandwidth resources of each subchannel, and the coaxial channel Bandwidth resource letter The information is obtained by using the coaxial physical layer and the coaxial medium access control layer on the coaxial channel bandwidth resource information acquiring module for channel measurement and bit allocation tasks.

The access device according to claim 11, wherein the media access control layer MAC of the access device is configured as a proxy MAC, and the sending module uses the proxy MAC to bandwidth the coaxial channel. The resource information is sent to the OLT.

The access device according to claim 13, wherein the coaxial physical layer PHY of the access device uses a quadrature amplitude modulation or an orthogonal frequency division multiplexing modulation and demodulation mechanism;

The coaxial media access control layer MAC of the access device includes channel measurement content in the wired transmission data interface service specification DOCSIS or the home plug-in alliance voice video standard HomePlugAV.