WO2008145061A1

WO2008145061A1 - Method, device, communication apparatus and communication system for bandwidth allocation

Info

Publication number: WO2008145061A1
Application number: PCT/CN2008/071093
Authority: WO
Inventors: Guo Wei; Wei Huang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-05-29
Filing date: 2008-05-27
Publication date: 2008-12-04
Also published as: CN101316141A; CN101316141B

Abstract

The embodiment of invention is concerned with a method, device and communication system of bandwidth allocation. The communication system includes at least a local communication apparatus and at least a remote communication apparatus. At least one of the said local communication apparatus receives and analyzes the upstream data frame sent by at least one remote communication apparatus. And the local communication apparatus determines the bandwidth allocation mode for the corresponding remote communication apparatus and allocates the link bandwidth and/or the ratio of uplink bandwidth to downlink bandwidth for the remote communication apparatus according to the determined bandwidth allocation mode. The corresponding remote communication apparatus transmits the upstream data according to the link bandwidth and/or the ratio of uplink bandwidth to downlink bandwidth, which are allocated by the local communication apparatus. The above-mentioned technical solution could adjust the bandwidth allocation mode dynamically according to the requirement of the remote communication apparatus and/or the local communication apparatus and as such be more flexible.

Description

Bandwidth allocation method, device, communication device and communication system

Technical field

The present invention relates to the field of communications technologies, and in particular, to a bandwidth allocation method, apparatus, communication device, and communication system.

Background technique

Recently, the demand for broadband access services has rapidly increased. In order to meet the demand for these high-bandwidth and large-capacity access, optical access communication networks have been chosen. However, some key components in the optical access communication network are more expensive. People are looking for a way to build a cost-effective optical network. The research on Passive Optical Network (PON) is also heating up rapidly. Asynchronous Transfer Mode (ATM) Passive Optical Network (ATM PON, APON), Broadband Passive Optical Network (Broadband P0N, BP0N), Ethernet-based Passive Optical Network (Ethernet PON, EP0N), Gigabit Passive Optical Network (Gigabit PON, GPON), Wavelength Division Multiplexing PON (WDM-PON) and Optical Code Division Multiple Access PON (OCDMA-PON) )Wait.

In general, a passive optical network is a system that uses a trunk fiber connection between a central office (CO) as a service provider and a remote node (RN) located in the vicinity of the user's location. The remote node and the optical network termination/unit (ONT/ONU), which are the consumers of the service, are connected by the hexagram-type optical home, because the remote node is placed with a passive optical component. Significantly reduced management levels and maintenance costs.

In the common WDM-P0N system shown in FIG. 1, multiple wavelengths provided by the central office CO are transmitted to the remote node RN through a single optical fiber, and each wavelength λί is transmitted to the remote node RN by the splitting function of the remote node RN. For each ONUi, the corresponding ONU can only use the wavelength assigned to it to send upstream data and receive downstream data.

In particular, in the WDM_PON system that remodulates the downlink data, the 0NU modulates the uplink data by using the downlink signal light sent by the Optical Line Termination (OLT). There are two implementation methods. One is that part of the downlink signal transmitted by the 0LT is modulated with downlink data, and the other part is reserved for 0NU modulated uplink data. The data frame is shown in Figure 2. The other is that the downlink signal transmitted by the 0LT is all modulated with downlink data, and the 0NT/0NU reuses the modulation depth principle to modulate the uplink data. Since the modulation depths of the uplink data and the downlink data are different, the 0LT can still be identified. Up and down data, its data frame is shown in Figure 3.

In the WDM-P0N system with uplink and downlink shared bandwidth shown in Figure 2, since the uplink and downlink data are shared bandwidth, the upstream bandwidth of the 0NU must be determined by 0LT to ensure normal data transmission. Therefore, many research institutions and enterprises pay close attention to the algorithm and implementation of bandwidth allocation.

Summary of the invention

An embodiment of the present invention provides a bandwidth allocation method, where the method is configured to allocate bandwidth to at least one remote communication device, where the method includes: receiving an uplink data frame sent by at least one remote communication device, where the uplink data frame includes Determining the bandwidth allocation mode, parsing the received uplink data frame, and determining, according to the information indicating the bandwidth allocation manner, a bandwidth allocation mode for allocating bandwidth to the corresponding remote communication device; The far end communication device allocates a ratio of link bandwidth and/or uplink and downlink bandwidth.

The embodiment of the present invention further provides a bandwidth allocation apparatus, where the apparatus includes: a processing module, configured to parse an uplink data frame sent by at least one remote communication device to obtain information indicating a bandwidth allocation manner, and indicate an indication bandwidth allocation manner according to the parsing The information is determined as a bandwidth allocation manner corresponding to the bandwidth allocated to the remote communication device; the authorization module is configured to allocate a link bandwidth to the corresponding remote communication device and/or determine the upper and lower limits in the bandwidth allocation manner determined by the processing module. The ratio of the line link bandwidth.

The embodiment of the present invention further provides a communication system, where the system includes at least one central office communication device, at least one remote communication device, and the at least one remote communication device is configured to send to the at least one central office communication device The at least one central office communication device is configured to receive an uplink data frame sent by the at least one remote communication device, and parse the received uplink data frame to obtain the indicated bandwidth allocation mode information, where Determined as the corresponding remote pass And determining, by the device, a bandwidth allocation manner of the bandwidth, determining a ratio of a link bandwidth and/or an uplink and downlink bandwidth of the corresponding remote communication device in the determined bandwidth allocation manner, and using the link bandwidth and/or The ratio of uplink and downlink bandwidth is sent to the corresponding remote communication device.

The embodiment of the present invention further provides a communication device, including: a receiving device, configured to receive an uplink data frame sent by at least one remote communication device, where the uplink data frame includes information indicating a bandwidth allocation manner; And analyzing, according to the information indicating the bandwidth allocation manner, a bandwidth allocation manner for allocating bandwidth to the corresponding remote communication device; and an authorization device, configured to determine a bandwidth according to the processing device The allocation manner determines a ratio of link bandwidth and/or uplink and downlink bandwidth of the corresponding remote communication device. And transmitting, by the transmitting device, the ratio of the link bandwidth and/or the uplink and downlink bandwidth to the corresponding remote communication device.

The embodiment of the present invention further provides a communication device, including: a sending device, configured to send an uplink data frame to a central office communication device; and a processing device, configured to send, by using the sending device, the indication bandwidth allocation to the central office communication device And a receiving device, configured to receive, by the central office communications device, a downlink data frame that includes a ratio of an authorized link bandwidth and/or an uplink and downlink bandwidth, where the authorized link bandwidth and/or Or the ratio of the uplink and downlink bandwidth is a ratio of the link bandwidth and/or the uplink and downlink bandwidth obtained in the bandwidth allocation manner determined according to the information indicating the bandwidth allocation manner; the bandwidth control device is configured to The ratio of the link bandwidth and/or the uplink and downlink bandwidth of the communication device controls the uplink data bandwidth of the transmitting device.

According to the solution provided above, multiple bandwidth allocations may be simultaneously provided for multiple remote communication devices according to the needs and/or processing conditions of the central office communication device and/or the remote communication device, and may also be based on the central office communication device and/or The need and/or processing status of the remote communication device dynamically adjusts the bandwidth allocation mode. DRAWINGS

Figure 1 shows a conventional WDM-P0N system;

2 is a schematic structural diagram of a conventional 0LT uplink and downlink data frame;

3 is a schematic structural diagram of a conventional 0LT uplink and downlink data frame;

4 is a schematic flowchart of a non-predictive bandwidth allocation mechanism according to an embodiment of the present invention; FIG. 5 is a schematic flowchart of a predictive bandwidth allocation mechanism according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of an uplink and downlink data frame structure according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a bandwidth allocation apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a communication system according to an embodiment of the present invention.

detailed description

In order to facilitate the understanding of the present invention, the specific implementation process of the present invention will be described below with reference to examples.

An embodiment of the present invention provides a bandwidth allocation method, where the method is configured to allocate bandwidth to at least one remote communication device, where the method includes: receiving an uplink data frame sent by at least one remote communication device, where the uplink data frame includes Determining the bandwidth allocation mode; parsing the received uplink data frame, and determining, according to the information indicating the bandwidth allocation manner, a bandwidth allocation mode for allocating bandwidth to the corresponding remote communication device; The remote communication device allocates a ratio of link bandwidth and/or uplink and downlink bandwidth. According to the method provided by the embodiment of the present invention, the adaptive bandwidth allocation mechanism may be based on an authorized bandwidth allocation manner determined by the central office communication device and the remote communication device; or according to the needs of the central office communication device and the remote communication. At least one of the needs of the device, the processing status of the central office communication device, and the processing status of the remote communication device, and simultaneously providing multiple bandwidth allocation modes for the plurality of remote communication devices; and further, according to the needs of the central office communication device, The at least one of the needs of the end communication device, the processing status of the central office communication device, and the processing status of the remote communication device dynamically adjusts the bandwidth allocation manner.

According to the solution of the embodiment of the present invention, a bandwidth allocation manner can be determined between the central office communication device and the remote communication device by using a negotiation manner. Specifically, the pre-negotiation mode may be adopted. For example, the remote communication device may negotiate the bandwidth allocation manner with the central office communication device during the registration process or the initialization process. The negotiation may also be performed during the data transmission process, for example, in data transmission. In the process, the remote communication device may encapsulate the manner in which it is supported, in the above-mentioned reporting mode or non-reporting mode, in the uplink data frame to notify the central office communication device; the central office communication device may also support the manner supported by itself, such as prediction or non- The prediction mode is encapsulated in the downlink data frame to notify the remote communication device. The information indicating the bandwidth allocation manner includes one or more of the following: an authorized bandwidth allocation manner, a bandwidth allocation mode supported by the remote communication device, and a bandwidth allocation mode supported by the central office communication device.

Since a central office communication device can generally access multiple remote communication devices, if the central office communication device and the remote communication device negotiate the bandwidth allocation mode (authorized bandwidth allocation mode) in a pre-negotiated manner, the data transmission is performed. In the process, the central office communication device can determine the bandwidth allocation mode of the remote communication device in multiple manners. For example, the terminal communication device can identify the bandwidth allocation mode corresponding to the remote communication device. Specifically, the central office communication device Determining a bandwidth allocation manner corresponding to the remote communication device by identifying an address of the remote communication device, an identifier of the remote communication device, a wavelength of the data transmitted by the remote communication device, or the like; or pre-storing the bandwidth allocation mode and bandwidth supported by the communication device Correspondence of the allocation mode, in the process of parsing the received uplink data frame, if the bandwidth allocation mode supported by the remote communication device and/or the bandwidth allocation mode supported by the central office communication device are parsed from the received uplink data frame Determining a bandwidth allocator according to the correspondence .

In addition, the remote communication device may encapsulate the bandwidth allocation negotiation result in the uplink data frame, and the central office communication device parses the bandwidth allocation negotiation result from the data frame after receiving the uplink data frame, and determines that the bandwidth is allocated to the remote communication device. The bandwidth allocation mode allocates bandwidth to the remote communication device according to the bandwidth allocation manner.

In the communication system provided by the embodiment of the present invention, the central office communication device can provide a predictive type and a non-predictive type, and the remote communication device can provide a report type and a non-report type. The predictive allocation mode of the central office communication device includes: statistic data record of the remote communication device can be counted, and the bandwidth required by the remote communication device is predicted according to a history record (such as bandwidth utilization). In this manner, the remote communication device may not The bandwidth of the request and/or its own congestion status needs to be reported, and the requirements for the remote communication device are low. The non-predictive allocation mode of the central office communication device requires the remote communication device to report a bandwidth allocation reference data, such as the bandwidth requested by the remote communication device or the congestion of the remote communication device, and the authorization is determined according to the bandwidth allocation reference data. The bandwidth of the end communication device.

The central office communication device can monitor the uplink data frame traffic sent by the remote communication device. (such as receiving buffer data) to obtain a data traffic history of the remote communication device. The remote communication device can also report the congestion status to the local communication device by monitoring the congestion status of the local transmission buffer.

The central office communication device performs the bandwidth allocation to determine the authorized bandwidth according to the bandwidth allocation method, and encapsulates the determined authorized bandwidth (the uplink bandwidth value or the ratio of the uplink and downlink bandwidth) in the downlink data frame and sends the bandwidth to the remote end. The communication device, the remote communication device transmits the uplink data by using the authorized bandwidth delivered by the central office communication device. Wherein, if the far-end communication device receives the ratio of uplink and downlink, it also needs to convert to the authorized uplink bandwidth according to the ratio.

The bandwidth allocation method provided by the embodiment of the present invention is applicable not only to the WDM-PON system but also to various P0N systems, such as ATM-P0N, BP0N, and GP0N, and is also applicable to various bidirectional link bandwidth allocation communications.

The specific implementation process of the technical solution provided by the embodiment of the present invention is described below with reference to FIG. 4 or FIG. The optical line terminal 0LT in FIG. 4 and FIG. 5 is a flow chart for allocating bandwidth of the optical subscriber unit 0NU/0NT, wherein the optical line terminal 0LT corresponds to the central office communication device, and the optical subscriber unit 0NU/0NT corresponds to the remote communication device.

FIG. 4 is a schematic diagram of a data frame structure of the embodiment of the present invention shown in FIG. 6, and FIG. 4 is an example of a non-predictive bandwidth allocation manner. The specific process is as follows:

S401: The optical line terminal 0LT continuously sends unmodulated light to the 0NU/0NT;

S402: 0NU/0NT determines whether it wants to re-register or initialize;

S403: If the 0NU/0NT is to be re-registered or initialized, a registration request is sent to the OLT, where the registration request carries a bandwidth allocation mode of 0NU/0NT, for example, in the registration request, the reporting mode indicates that the bit indicates 0NU/0NT釆. In the bandwidth allocation mode used, in the embodiment, the value is set to 1 to indicate that the bandwidth allocation mode used by the ONU/0NT is the report type;

S404: The 0LT receives the registration request sent from the 0NU/0NT, registers the 0NU/0NT, and allocates an initial transmission rate for the 0NU/0NT;

S405: After the registration is successful, 0LT sends a registration success response message to 0NU/0NT, where, registration The success response message carries the initial transmission rate, and also provides the 0LT/0NT bandwidth allocation mode supported by the 0LT/0NT. For example, the value of the prediction mode indication bit indicates the bandwidth allocation mode supported by the OLT. In this embodiment, the value is set to 0. The bandwidth allocation mode supported by the 0LT is non-predictive, and returns the bandwidth allocation mode provided by the ONU/0NT. For example, the value of the reporting mode indication bit indicates the bandwidth allocation mode provided by the ONU/0NT. In this embodiment, the value is set to 1. Indicates that the bandwidth allocation mode provided by 0NU/0NT is the report type;

S406: 0NU/0NT transmits the uplink data by using the authorized bandwidth provided by the 0LT, and the authorized bandwidth is the initial transmission rate during initialization, wherein 0NU/0NT encapsulates the bandwidth allocation mode of the 0LT and the bandwidth allocation mode of the 0NU/0NT in the uplink data frame. 0NU/0NT also encapsulates the congestion report in the uplink data frame; for example, the value of the prediction mode indication bit in the uplink data frame indicates the bandwidth allocation mode of the OLT, and in this embodiment, the value is set to 0 to indicate the bandwidth of the OLT. The allocation mode is non-predictive, and the value of the reporting mode indication bit indicates the bandwidth allocation mode of the ONU/0NT. In this embodiment, the value is set to 1 to indicate that the bandwidth allocation mode of the ONU/0NT is the reporting type;

S407: The 0LT receives the uplink data frame from the 0NU/0NT, parses the received uplink data frame, determines the bandwidth allocation mode according to the bandwidth allocation mode of the 0LT and the bandwidth allocation mode of the ONU/0NT, and determines the bandwidth allocation mode as the ONU. /0NT allocates bandwidth;

In this example, 0LT allocates bandwidth in a non-predictive bandwidth allocation mode, and 0LT calculates the bandwidth of 0NU/0NT next data transmission based on the congestion reported by 0NU/0NT.

S408: The 0LT uses the calculated bandwidth as the next uplink bandwidth granted to the ONU/0NT, and encapsulates the authorized uplink bandwidth in the downlink data frame and sends it to the ONU/0NT; wherein, in the downlink data frame, The bandwidth allocation mode of the 0LT and the bandwidth allocation mode of the ONU are included; for example, the value of the prediction mode indication bit in the downlink data frame indicates the bandwidth allocation mode of the OLT, and in this embodiment, the value is set to 0 to indicate the bandwidth allocation mode of the OLT. For the non-predictive type, the value of the reporting mode indication bit indicates the bandwidth allocation mode of the ONU. In the present embodiment, the value of 1 indicates that the bandwidth allocation mode of the ONU is the reporting type.

The 0LT can convert the calculated bandwidth into the ratio of the uplink and downlink bandwidth, that is, the ratio of the authorized bandwidth to the current downlink data, and encapsulate the ratio of the uplink and downlink bandwidth in the downlink data frame and send it to the ONU/0NT. The ONU/ONT needs to convert the received ratio to an authorized uplink bandwidth value. To transmit upstream data.

Figure 5 shows an example of a predictive bandwidth allocation method. The specific process is as follows:

S501: The optical line terminal 0LT continuously sends unmodulated light to the 0NU/0NT;

S502: 0NU/0NT determines whether it wants to re-register or initialize;

S503: If the 0NU/0NT is to be re-registered or initialized, a registration request is sent to the OLT, where the registration request carries a bandwidth allocation mode of 0NU/0NT, such as using the value of the reporting mode indication bit to indicate that the 0NU/0NT is used. In the bandwidth allocation mode, in the embodiment, the value is set to 0, indicating that the bandwidth allocation mode used by the ONU/0NT is non-reporting type;

S504: The 0LT receives the registration request sent from the 0NU/0NT, registers the 0NU/0NT, and allocates an initial transmission rate for the 0NU/0NT;

S505: After the registration is successful, the 0LT sends a registration success response message to the 0NU/0NT, where the registration success response message carries the initial transmission rate, and also provides the 0LT/0NT with the bandwidth allocation mode supported by the 0LT, such as using the prediction mode indication bit. The value indicates the bandwidth allocation mode supported by the OLT. In this embodiment, the value is set to 1 to indicate that the bandwidth allocation mode supported by the OLT is predictive. The registration success response message also returns the bandwidth allocation mode provided by the ONU/0NT, such as the reporting mode. The value of the indication bit indicates the bandwidth allocation mode provided by the ONU/0NT. In this embodiment, the value is set to 0, indicating that the bandwidth allocation mode used by the ONU/0NT is non-reporting type; wherein, the initial transmission rate, the prediction mode indication, and the reporting The mode indication may also not be encapsulated in the registration success response message, but may be sent separately.

S506: The 0NU/0NT uses the authorized bandwidth provided by the 0LT to transmit the uplink data. The initial transmission rate is initialized. The 0NU/0NT encapsulates the bandwidth allocation mode of the 0LT and the bandwidth allocation mode of the 0NU/0NT in the uplink data frame, such as The value of the prediction mode indication bit indicates the bandwidth allocation mode supported by the OLT. In this embodiment, the value is set to 1 to indicate that the bandwidth allocation mode supported by the OLT is predictive; and the value of the reporting mode indication bit indicates the bandwidth allocation of the ONU/0NT. Mode, in this embodiment, the value is set to 0, indicating that the bandwidth allocation mode of the ONU/0NT is non-reporting type;

In this step, the 0NU/0NT may also encapsulate the congestion report in the uplink data frame for reference by the OLT, or may not encapsulate the congestion report. S507: The OLT receives the uplink data frame from the ONU/ONT, parses the received uplink data frame, and determines the bandwidth allocation mode according to the bandwidth allocation mode of the 0LT and the bandwidth allocation mode of the ONU/0NT, and the determined bandwidth allocation mode is the ONU. /0NT allocates bandwidth;

In this example, 0LT allocates bandwidth in a predictive bandwidth allocation manner. 0LT monitors the traffic of the uplink data frame, records the monitoring result, and predicts a bandwidth through the history of the uplink data sent by the ONU. For example, the previous bandwidth can be counted according to the history. Utilization, calculate the bandwidth of the next 0NU/0NT data transmission according to the bandwidth utilization.

S508: The 0LT allocates the calculated bandwidth to the next uplink bandwidth of the ONU/0NT, and encapsulates the authorized uplink bandwidth in the downlink data frame and sends it to the ONU/0NT; wherein, in the downlink data frame, The bandwidth allocation mode of the 0LT and the bandwidth allocation mode of the ONU are included; for example, the value of the prediction mode indication bit indicates the bandwidth allocation mode of the OLT, and the value of the embodiment is set to 1 to indicate that the bandwidth allocation mode of the 0LT is the prediction type, and the reporting mode is used. The value of the indication bit indicates the bandwidth allocation mode of the ONU/0NT. In the present embodiment, the value of 0 is set to indicate that the bandwidth allocation mode of the ONU/0NT is non-reporting type.

The 0LT can convert the calculated bandwidth into the ratio of the uplink and downlink bandwidth (ie, the ratio of the authorized bandwidth to the current downlink data), and encapsulate the ratio of the uplink and downlink bandwidth in the downlink data frame and send it to the 0NU/0NT. . The ONU/ONT needs to convert the received ratio into an authorized uplink bandwidth value to transmit the uplink data.

The bandwidth allocation mode includes an 0LT working mode and a 0NU/0NT working mode, and the 0LT and 0NU/0NT bandwidth allocation pattern matching tables in the system of the embodiment of the present invention as shown in Table 1. When 0NU/0NT is the report type allocation mode, 0NU/0NT needs to report congestion to 0LT, and the congestion condition can be encapsulated in the specific overhead of the uplink data frame. At this time, 0LT is generally a non-predictive bandwidth allocation mode, and can also be a predictive bandwidth allocation mode. If it is a predictive bandwidth allocation mode, 0LT ignores the congestion reported by 0NU/0NT.

When 0NU/0NT is a non-reported bandwidth allocation mode, 0NU/0NT does not need to report congestion to 0LT. At this time, 0LT must be in the predictive working mode, otherwise the system will not work properly. Table 1 Bandwidth allocation mode of OLT and ONU/ONT

among them:

"Ignore" means that when 0LT works in predictive bandwidth allocation, the congestion reported by 0NU/0NT is ignored.

"X" means that when 0NU/0NT is a non-reporting type of bandwidth allocation mode, 0LT must work in predictive mode, otherwise the system will not work properly.

In the embodiment of the present invention, the downlink data frame can be generated and sent by the Field Programmable Gate Array (FPGA) on the 0LT side; the uplink data frame can be configured by the ONU side field programmable logic array chip (FPGA). ) Generate and send.

Referring to FIG. 6, a schematic diagram of a data frame structure of an embodiment of the present invention is shown.

The specific implementation process of the embodiment of the present invention is further described below in conjunction with the actual application scenario.

1, 0LT predictive type, 0NU non-upper type

(1) 0LT detects the bandwidth lOMbits allocated to 0NU1 from the received upstream data frame of 0NU1. For some reason (for example, 0NU1 is relatively idle, sending less data) only 8Mbits is used;

(2) According to step (1), 0LT can calculate that the previous round of authorized bandwidth utilization is ⁸⁰ % (8/10), and then the 0LT side saves the first 2 rounds and the first 3 rounds of the reference upstream bandwidth utilization history. Specifically, it is necessary to trace back the number of round-up bandwidth utilizations, for example, they are 87%, 93%, that is, the upstream bandwidth utilization of 0NU1 for three consecutive rounds is decreasing, the maximum drop is 7%, then Predict the current round-band bandwidth utilization of 0NU1 with a prediction algorithm of 73% (80% minus 7%), which determines the current grant. The upstream bandwidth of the 0NU1 is 7.3Mbit s (lOMbits X73%), which can be written to the "Authorized Bandwidth" field in the downlink data frame, and then sent to the ONU1 along with the downstream data frame. Or, if the downlink data bandwidth of the current 0LT is lOMbits, then the ratio of the uplink and downlink bandwidth is 0.73: 1, and the value is written into the "authorized bandwidth" field in the downlink data frame, and then sent to the 0NU1 along with the downlink data frame;

(3) 0NU1 receives the downlink data frame sent by the 0LT, and extracts the authorized bandwidth. If it is the uplink-downlink bandwidth ratio, for example, 0.73:1, it is converted into the uplink bandwidth of 7.3Mbits. If it is the authorized bandwidth value, it will not be converted. The data is filled in the upstream data area and then sent back to the 0LT.

2, 0LT non-predictive, 0NU report type

(1) The 0LT reads from the congestion report field in the uplink data frame of the ONU2 that the uplink data to be transmitted by the 0NU2 is 9.5 Mbits, and based on the current busy condition of the 0LT, if the transmission request of the ONU2 can be satisfied, it is determined that the ONU2 is authorized to be sent to the ONU2. The upstream bandwidth is 9.5 Mbits, which is written into the "uplink and downlink bandwidth ratio" field in the downlink data frame, and then sent to the ONU2 along with the downlink data frame. Or, if the downlink data bandwidth of the current 0LT is lOMbits, then the ratio of the uplink and downlink bandwidth is 0.95: 1, and the value is written into the "authorized bandwidth" field in the downlink data frame, and then sent to the 0NU2 along with the downlink data frame;

(2) 0NU2 receives the downlink data frame sent by the 0LT, and extracts the authorized bandwidth. If the ratio of the uplink and downlink bandwidth is, for example, 0.95: 1, it is converted into the uplink bandwidth of 9.5 Mbits. If it is the authorized bandwidth value, the uplink data is not used. Fill in the uplink data area of the uplink data frame, and at the same time, write the data size to be sent next in the transmission buffer of the ONU2 to the "Congestion Report" field in the uplink data frame, and then send back to the 0LT.

FIG. 7 is a schematic structural diagram of a predictive bandwidth allocation apparatus according to an embodiment of the present invention. The bandwidth allocation device 700 is applied to a communication system including at least one central office communication device and at least one remote communication device, the device comprising:

The processing module 720 is configured to parse the uplink data frame sent by the at least one remote communication device to obtain information indicating a bandwidth allocation manner, and determine, according to the information indicating the bandwidth allocation manner obtained by the parsing, a bandwidth allocation manner corresponding to the bandwidth allocated to the remote communication device;

The authorization module 740 is configured to be in the bandwidth allocation manner determined by the processing module 720. The far end communication device allocates link bandwidth and/or determines a ratio of uplink and downlink bandwidth.

The processing module 720 includes:

The parsing unit 722 is configured to parse the uplink data frame to obtain the information indicating the bandwidth allocation manner;

a first determining unit 724, configured to determine, by using a bandwidth allocation manner that is resolved to the authorization, a bandwidth allocation manner corresponding to a bandwidth allocated by the remote communication device; and/or

The second determining unit 726 is configured to obtain, according to the parsing, a bandwidth allocation mode supported by the remote communication device and/or a bandwidth allocation mode supported by the central office communication device, and a pre-stored bandwidth allocation mode and a bandwidth allocation mode supported by the communication device. Corresponding relationship, determining a bandwidth allocation manner for allocating bandwidth to the remote communication device.

The authorization module 740 includes: a first authorization module 742 and a second authorization module 744, where the bandwidth allocation manner determined by the processing module and the monitoring result of the monitoring unit are the corresponding The far end communication device allocates a ratio of link bandwidth and/or uplink and downlink bandwidth.

The second authorization module 744 is configured to allocate link bandwidth and/or upper and lower limits to the corresponding remote communication device according to the bandwidth allocation manner determined by the processing module 720 and the congestion condition reported by the remote communication device or the bandwidth allocated for the request. The ratio of the line link bandwidth.

In addition, the bandwidth allocation apparatus may further include a negotiating unit 760 for negotiating a bandwidth allocation manner between the at least one local communication device and the at least one remote communication device.

Referring to a communication system of the embodiment of the present invention shown in FIG. 8, the optical network system includes at least one central office communication device (OTT) 800 coupled to at least one remote communication device of the at least one central office communication device ( 0NU/0NT ) 900 , where:

The central office communication device (0LT) 800 receives the uplink data frame sent by the at least one remote communication device 900, and parses the received uplink data frame to determine a bandwidth allocation mode for the corresponding remote communication device to allocate bandwidth, according to the determined bandwidth allocation. Transmitting, by the corresponding remote communication device, a ratio of link bandwidth and/or uplink and downlink bandwidth, and assigning the allocated link bandwidth and/or uplink and downlink bandwidth The ratio is sent to the corresponding remote communication device 900.

The central office communication device 800 includes: a bandwidth allocation device 700, a receiving device 820, and a transmitting device 840.

For example, as shown in FIG. 7 and FIG. 8, in the central office communication device (OTT) 800, the receiving device 820 receives the uplink data frame from the remote communication device 900, and the parsing module 722 parses the uplink data frame received by the receiving device 820. The first determining unit 724 receives the parsing result of the parsing module 722 to determine the bandwidth allocation mode for receiving the authorization, or the second determining unit 726 obtains the bandwidth allocation mode and/or the supported by the remote communication device in the parsing result from the parsing module 722. The bandwidth allocation mode supported by the communication device determines the bandwidth allocation mode for allocating bandwidth to the remote communication device 900 according to the correspondence between the bandwidth allocation mode supported by the communication device and the bandwidth allocation mode (for example, as shown in Table 1); The bandwidth allocation mode determined by the first determining unit 724 or the second determining unit 726 is a predictive bandwidth allocation mode, and the first authorization module 742 collects the data of the X unit (byte or block) received by the receiving device 820, according to statistics. Data traffic and saved last authorized bandwidth, can calculate the last time The bandwidth utilization is authorized, and the authorized bandwidth is given accordingly, and is transmitted to the remote communication device 900 through the transmitting device 840. For example, the statistical data traffic is X, the last authorized bandwidth saved is Y; the last bandwidth utilization is calculated as χ ΐ οο %, according to which the authorized bandwidth is Y, and sent by the sending device 840. To the remote communication device 900, where the units of X, Υ, and Υ are represented by bytes or blocks of data.

The remote communication device (0NU/0NT) 900 includes: a transmitting device 920, a receiving device 940, a processing device 960, and a bandwidth control device 980;

The sending device 920 is configured to send an uplink data frame to the central office communications device.

The processing device 940 is configured to send, by using the sending device, information indicating a bandwidth allocation manner to the central office communication device;

The receiving device 960 is configured to receive, by the central office communications device, a downlink data frame that includes a ratio of an authorized link bandwidth and/or an uplink and downlink bandwidth, where the authorized link bandwidth and/or uplink and downlink The ratio of the link bandwidth is the bandwidth allocation determined according to the information indicating the bandwidth allocation manner. Ratio of link bandwidth and/or uplink and downlink bandwidth obtained in the mode;

The bandwidth control device 980 is configured to control an uplink data bandwidth of the transmitting device according to a ratio of link bandwidth and/or uplink and downlink bandwidth authorized to the communication device.

In addition, as shown in FIG. 8, the remote communication device (0NU/0NT) 900 of the embodiment of the present invention includes:

The sending device 920 is configured to send an uplink data frame to the central office communication device 800.

The processing device 960 is configured to send, by using the sending device 920, information indicating a bandwidth allocation manner to the central office communication device;

The receiving device 940 is configured to receive, by the central office communications device 800, a downlink data frame that includes a ratio of a link bandwidth and/or an uplink and downlink bandwidth that is authorized to the remote communication device 900, where, in the downlink data frame, The ratio of the authorized link bandwidth and/or the uplink and downlink bandwidth is a ratio of link bandwidth and/or uplink and downlink bandwidth obtained according to the bandwidth allocation manner determined by the information indicating the bandwidth allocation manner;

The bandwidth control device 980 is configured to control the uplink data bandwidth of the transmitting device 920 according to the ratio of the link bandwidth and/or the uplink and downlink bandwidth authorized to the remote communication device 900.

Using the solution provided above, the bandwidth allocation method can be dynamically adjusted according to the needs of the remote communication device and/or the central office communication device, and is more flexible.

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 disclosed by the present invention. 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 the claims.

Claims

Claim

A bandwidth allocation method, characterized in that the method is adapted to allocate bandwidth for at least one remote communication device, the method comprising:

Receiving, by the at least one remote communication device, an uplink data frame, where the uplink data frame includes information indicating a bandwidth allocation manner;

And parsing the received uplink data frame, and determining, according to the information indicating the bandwidth allocation manner, a bandwidth allocation manner for allocating bandwidth to the corresponding remote communication device;

The ratio of link bandwidth and/or uplink and downlink bandwidth is allocated to the corresponding far-end communication device according to the determined bandwidth allocation manner.

2. The bandwidth allocation method according to claim 1, wherein the method further comprises: negotiating bandwidth allocation with the at least one remote communication device during registration or initialization of the at least one remote communication device the way.

The bandwidth allocation method according to claim 1 or 2, wherein the information indicating the bandwidth allocation manner includes one or more of the following combinations: an authorized bandwidth allocation manner, and a bandwidth allocation supported by the remote communication device. Mode, the bandwidth allocation mode supported by the central office communication device.

The bandwidth allocation method according to claim 3, wherein the step of analyzing the received uplink data frame and determining the bandwidth allocation mode for allocating bandwidth of the corresponding remote communication device comprises:

The received uplink data frame is parsed. If the authorized bandwidth allocation mode is parsed from the received uplink data frame, the authorized bandwidth allocation mode is determined as the bandwidth allocation mode of the corresponding remote communication device to allocate bandwidth.

The bandwidth allocation method according to claim 3, wherein the method further comprises: pre-storing a correspondence between a bandwidth allocation mode supported by the communication device and a bandwidth allocation mode;

The step of parsing the received uplink data frame and determining the bandwidth allocation mode for allocating the bandwidth of the corresponding remote communication device includes:

Parsing the received uplink data frame, if the remote channel is parsed from the received uplink data frame The bandwidth allocation mode supported by the signaling device and/or the bandwidth allocation mode supported by the central office communication device determine the bandwidth allocation manner according to the correspondence relationship.

The bandwidth allocation method according to claim 1, wherein the bandwidth allocation manner includes a predictive bandwidth allocation manner and a non-predictive bandwidth allocation manner, and the determined bandwidth allocation manner is the corresponding The ratio at which the remote communication device allocates link bandwidth and/or determines the uplink and downlink bandwidth specifically includes:

In the predictive bandwidth allocation mode, the traffic of the uplink data frame sent by the remote communication device is collected to obtain the bandwidth utilization, and the link bandwidth and/or the uplink and downlink of the remote communication device are determined according to the bandwidth utilization. Ratio of road bandwidth;

In the non-predictive bandwidth allocation mode, the bandwidth or congestion condition of the request reported by the remote communication device is parsed from the uplink data frame sent by the remote communication device, and the bandwidth or congestion is allocated according to the reported request. A ratio of link bandwidth and/or uplink and downlink bandwidth of the remote communication device is determined.

7. A bandwidth allocation device, the device comprising:

The processing module (720) is configured to parse the uplink data frame sent by the at least one remote communication device to obtain information indicating a bandwidth allocation manner, and determine, according to the information indicating the bandwidth allocation manner obtained by the parsing, the bandwidth allocation corresponding to the allocated bandwidth of the remote communication device. the way;

The authorization module (740) is configured to allocate a link bandwidth and/or determine a ratio of uplink and downlink bandwidths to the corresponding remote communication device in a bandwidth allocation manner determined by the processing module (720).

8. The bandwidth allocation apparatus according to claim 7, wherein:

The information indicating the bandwidth allocation manner includes one or more of the following: an authorized bandwidth allocation manner, a bandwidth allocation mode supported by the remote communication device, and a bandwidth allocation mode supported by the central office communication device; and the processing module (720) Includes:

a parsing unit (722), configured to parse the uplink data frame to obtain the information indicating the bandwidth allocation manner;

a first determining unit (724), configured to determine a bandwidth allocation manner that is resolved to the authorization to correspond to a far The bandwidth allocation mode of the bandwidth allocated by the communication device; and/or

a second determining unit (726), configured to obtain, according to the parsing, a bandwidth allocation mode supported by the remote communication device and/or a bandwidth allocation mode supported by the central office communication device, and a bandwidth allocation mode and bandwidth allocation supported by the pre-stored communication device The corresponding relationship of the modes is determined as a bandwidth allocation manner corresponding to the bandwidth allocated to the remote communication device.

The bandwidth allocation apparatus according to claim 7, wherein the bandwidth allocation apparatus further comprises:

The negotiating unit (760) is configured to negotiate a bandwidth allocation manner between the at least one central office communication device and the at least one remote communication device.

The bandwidth allocation apparatus according to any one of claims 7 to 9, wherein the bandwidth allocation manner comprises: a predictive bandwidth allocation manner and a non-predictive bandwidth allocation manner,

The authorization module (740) includes:

a first authorization module (742), configured to collect, according to the bandwidth utilization rate, the remote communication according to the bandwidth utilization rate, in a predicted bandwidth allocation manner, statistics on traffic of an uplink data frame sent by the remote communication device The ratio of the link bandwidth and/or the uplink and downlink bandwidth of the device;

a second authorization module (744), configured to obtain, from the uplink data frame, a congestion situation reported by the remote communication device or a bandwidth requested to be allocated in the non-predictive bandwidth allocation mode, where the corresponding remote end is The communication device allocates link bandwidth and/or determines the ratio of uplink and downlink bandwidth.

A communication system, characterized in that the system comprises at least one central office communication device (800) and at least one remote communication device (900),

The at least one remote communication device (900) is configured to send, to the at least one central office communication device (800), an uplink data frame that includes information indicating bandwidth allocation mode;

The at least one central office communication device (800) is configured to receive an uplink data frame sent by the at least one remote communication device (900), parse the received uplink data frame, obtain the indication bandwidth allocation mode information, and determine the corresponding The bandwidth allocation mode of the bandwidth allocated by the remote communication device, determining the ratio of the link bandwidth and/or the uplink and downlink bandwidth of the corresponding remote communication device in the determined bandwidth allocation manner, and The ratio of the link bandwidth and/or the uplink and downlink bandwidth is sent to the corresponding remote communication device.

The communication system according to claim 11, wherein the information indicating the bandwidth allocation manner comprises one or more of the following: an authorized bandwidth allocation manner, a bandwidth allocation mode supported by the remote communication device, and a conference. The bandwidth allocation mode supported by the end communication device; wherein the bandwidth allocation mode supported by the remote communication device and/or the central office communication device has a corresponding relationship with the bandwidth allocation mode.

1 3, a communication device, comprising:

The receiving device (820) is configured to receive an uplink data frame sent by the at least one remote communication device, where the uplink data frame includes information indicating a bandwidth allocation manner;

The bandwidth allocation device (700) is configured to parse the uplink data frame received by the receiving device, and determine, according to the parsed information indicating the bandwidth allocation manner, a bandwidth allocation mode for allocating bandwidth of the corresponding remote communication device; The bandwidth allocation manner determines a ratio of a link bandwidth and/or an uplink and downlink bandwidth of the corresponding remote communication device;

The transmitting device (840) transmits the ratio of the link bandwidth and/or the uplink and downlink bandwidth to the corresponding remote communication device.

The communication device according to claim 13, wherein the information indicating the bandwidth allocation manner includes: an authorized bandwidth allocation manner, a bandwidth allocation mode supported by the remote communication device, and a bandwidth supported by the central office communication device. The allocation mode; wherein, the remote communication device supports and/or the bandwidth allocation mode supported by the central office communication device has a corresponding relationship with the bandwidth allocation mode.

The communication device according to claim 13 or 14, wherein the bandwidth allocation manner comprises: a predictive bandwidth allocation manner and a non-predictive bandwidth allocation manner;

The authorization device includes:

a first authorization module (742), configured to: in a predictive bandwidth allocation manner, statistics on traffic of an uplink data frame sent by the remote communication device to obtain bandwidth utilization, and determine the remote communication according to the bandwidth utilization The ratio of the link bandwidth and/or the uplink and downlink bandwidth of the device;

a second authorization module (744), configured to obtain, from the uplink data frame, a congestion situation reported by the remote communication device or a bandwidth requested to be allocated in a non-predictive bandwidth allocation manner, where the corresponding The far end communication device allocates link bandwidth and/or determines a ratio of uplink and downlink bandwidth.

16. A communication device, comprising:

a sending device (920), configured to send an uplink data frame to the central office communication device;

a processing device (960), configured to send, by using the sending device (920), information indicating a bandwidth allocation manner to the central office communication device;

a receiving device (940), configured to receive a downlink data frame that is sent by the central office communications device, including a ratio of authorized link bandwidth and/or uplink and downlink bandwidth, where the authorized link bandwidth and/or The ratio of the uplink and downlink bandwidth is a ratio of the link bandwidth and/or the uplink and downlink bandwidth obtained in the bandwidth allocation manner determined in response to the information indicating the bandwidth allocation manner;

A bandwidth control device (980) is configured to control the transmitting device (920) to transmit uplink data according to a ratio of link bandwidth and/or uplink and downlink bandwidth authorized to the communication device.