WO2015017969A1

WO2015017969A1 - Bandwidth allocation method, device and system

Info

Publication number: WO2015017969A1
Application number: PCT/CN2013/080855
Authority: WO
Inventors: 吴广生; 张利; 孙艳宾; 张晓风
Original assignee: 华为技术有限公司
Priority date: 2013-08-05
Filing date: 2013-08-05
Publication date: 2015-02-12
Also published as: CN104685847B; CN104685847A

Abstract

The present invention relates to the technical field of communications, and particularly relates to a bandwidth allocation method, device and system, which are used to solve the technical problem that a CLT or an OLT cannot indicate the allocation of time domain and frequency domain at the same time according to time domain information in the prior art. In the embodiments of the present invention, a network device respectively obtains a conversion relationship between the size of an available resource block (RB) in an orthogonal frequency division multiplexing (OFDM) frame of each modulation template in a plurality of modulation templates and a time quantum (TQ) so that a first bandwidth can be determined according to the conversion relationship in an authorization message issued to a user equipment, and thus the allocation of time domain information and frequency domain information can be indicated at the user equipment side.

Description

Bandwidth allocation method, device and system

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

EPOC (Ethernet Passive Optical Network Protocol Over Coaxial Physical Layer) is a standard project being developed by the IEEE (Institute of Electrical and Electronics Engineers) standards organization. Its purpose is to mature. EPON (Ethernet Passive Optical Network) technology and protocol are introduced into the coaxial network.

Cablelabs (Network Product Industry Certification System) is developing an EPOC system specification that will be extended on the basis of the DPOE (Data Over Cable Service Interface Specification Provisioning over EPON) standard. Axis cable access.

EPOC extends the EPON protocol to the coaxial domain for end-to-end management. The OLT (Optical Line Terminal) can directly manage the CNU (Coax Network Unit) that controls the coaxial domain.

EPOC standard uses OFDM on the coaxial side ( Orthogonal Frequency Division

Multiplexing, Orthogonal Frequency Division Multiplexing) modulation technology.

OFDM technology is the most widely used multi-carrier modulation technique. OFDM divides the channel into orthogonal subchannels, converts the high speed data signals into parallel low speed sub-data streams, and modulates them for transmission on each sub-channel. The orthogonal signals can be separated by using correlation techniques at the receiving end, which can reduce mutual interference between subchannels. The signal bandwidth on each subchannel is smaller than the associated bandwidth of the channel, so that each subchannel can be seen as flatness fading, thereby eliminating intersymbol interference. And since the bandwidth of each subchannel is only a small fraction of the original channel bandwidth, channel equalization becomes relatively easy. The orthogonal subchannel is generally described as a subcarrier (Subcarrier) or a carrier (Carrier). In specific implementation, the data is modulated onto subcarriers by conventional modulation methods, such as QAM (Quadature Amplitude Modulation), PSK (Phase Shift Keying), etc. Time-frequency domain conversion is generally adopted. Fast Fourier Transform

Transform, FFT) or Inverse Fast Fourier Transform (IFFT) implementation.

Different from the physical layer of the EPON fiber side, there is only one dimension in the time domain. The coaxial side physical layer has two dimensions of time domain and frequency domain under the use of OFDM modulation technology. The coaxial domain resource allocation involved can be in the time domain and The allocation is performed simultaneously in the frequency domain dimension, that is, at the same time, different terminals can occupy different frequency domain resources (and subcarriers) for data and signal transmission. The method involved is specifically an OFDMA (Orthogonal Frequency Division Multiple Access) method.

The EPOC downlink adopts the broadcast mode, that is, the data is carried on the OFDM symbol, and the downlink broadcast is transmitted to all terminals.

The EPOC uplink generally uses the OFDMA multiple access method for multi-user access. The resource allocation involved in the OFDMA mode is as shown in FIG. 1. The resource block (Resource Block, RB) is a basic allocation unit, wherein the resource block can be composed of KxP resource units (RE), where Κ is the number of subcarriers, Ρ The number of OFDM symbols. A in Fig. 1 represents a resource block, that is, a portion marked with a bold line is a resource block, and B represents a resource unit.

The EPOC physical layer uplink adopts a physical layer technology of Multiple Modulation Profile (MMP), and the head end divides CNU (Coax Network Unit) into several groups based on channel characteristics, and each group corresponds to a specific one. Multiple modulation templates.

The multiple modulation template technology is different from the same modulation mode used by all terminals in the same network, and is different from the complete "unicast" access mode of ordinary OFDMA. The so-called "unicast", that is, different terminals in the same network have their own modulation templates. . The multiple modulation template technology can group different terminals based on channel characteristics, and simultaneously support several multiple modulation templates in the same physical network. Each multiple modulation template can correspond to a group of terminals, and the group of terminals share the use of the multiple modulation template. A multiple modulation template may include modulation parameters and coding parameters, and a modulation template may include a bit loading table, The error coding mode and parameters, or a multiple modulation template may include an MCS (Modulation and coding scheme) level or the like.

In this way, the multi-modulation template technique takes a trade-off between the broadcast mode and the "unicast" mode, which reduces the complexity compared to the "unicast" mode, and does not require storage and interaction of different modulation templates for all terminals. Compared with the broadcast mode, the channel capacity of the coaxial network can be utilized. The point-to-multipoint network has different channel conditions of different terminals due to the characteristics of the network structure, and the channel capacity of different terminals is relatively high, so that the terminal with high channel capacity can be used. A modulation template that is more demanding on the channel is better to provide an overall modulation rate.

In the EPOC system, the CLT (Coax Line Terminal) or the OLT can send a message to the CNU to allocate bandwidth to the CNU. However, in the message sent by the CLT or the OLT, the bandwidth indication information is one-dimensional. Time domain information, while the coaxial side of the EPOC system requires two-dimensional information (including time domain and frequency domain) for indication allocation, which cannot be solved in the prior art. Summary of the invention

The embodiment of the invention provides a bandwidth allocation method, device and system for solving the technical problem that the CLT or the OLT cannot simultaneously indicate the allocation of the time domain and the frequency domain according to the time domain information.

A first aspect of the present invention provides a bandwidth allocation method, which can be applied to an Ethernet passive optical network protocol coaxial cable physical layer EPOC system, and the method includes the following steps:

The network device receives a bandwidth request message of the user equipment;

The network device allocates a first bandwidth to the user equipment according to the bandwidth request message, so that the user equipment transmits uplink data by using an uplink logical channel corresponding to the user equipment according to the first bandwidth.

The uplink logical channel corresponding to the user equipment is an uplink logical channel of the uplink logical channel obtained by dividing the uplink physical channel.

With reference to the first aspect, in a first possible implementation, before the network device receives the bandwidth request message of the user equipment, the method further includes: the network device according to the measured uplink signal to noise ratio of each user equipment, Each user equipment is assigned a corresponding modulation template, each modulation template Correspond to at least one user equipment.

With the first possible implementation, in a second possible implementation, after allocating a corresponding modulation template for each user equipment, the method further includes: the network device, according to the determined modulation template, the uplink physical channel It is divided into one or more uplink logical channels, and each uplink logical channel corresponds to one modulation template.

With reference to the first aspect, or the first possible implementation manner, to the second possible implementation manner, in a third possible implementation manner, the network device is an optical line terminal or the same The axis line terminal, the user equipment is a coaxial network unit.

According to a second aspect of the present invention, there is provided a bandwidth allocation method, the method being applicable to an EPOC system, the method comprising the steps of:

The network device obtains a conversion relationship between the size of the available resource block RB and the time quantum TQ in the orthogonal frequency division multiplexing OFDM frame of each of the plurality of modulation templates, where the conversion relationship is based on the OFDM frame length and one Established by the size of the available RBs included in the OFDM frame, one modulation template corresponds to a specific set of modulation parameters; the network device is connected to multiple user equipments by using multiple uplink logical channels divided on one physical channel, one of which The user equipment corresponds to one uplink logical channel, and one uplink logical channel corresponds to one modulation template;

And the network device generates and sends an authorization message to the at least one user equipment according to the switching relationship and the bandwidth request message from the multiple user equipments, where the authorization message is included in the corresponding uplink logical channel of the corresponding user equipment. The first bandwidth allocated, the first bandwidth being a start time and an authorization length characterized by a TQ corresponding to an integer number of RB sizes.

With reference to the second aspect, in a first possible implementation, before the network device obtains the conversion relationship between the size of the available resource block RB and the time quantum TQ in one OFDM frame in each modulation template, the method further includes: The network device respectively allocates corresponding modulation templates to the multiple user equipments according to the uplink signal to noise ratio corresponding to the multiple user equipments, each modulation template corresponds to one uplink logical channel, and each uplink logical channel includes an integer. OFDM frames.

With the second aspect or the first possible implementation manner, in a second possible implementation manner, when the network device generates the at least one authorization message, the network device further includes: the network device is in each A guard interval of a preset duration is set before the start time of the authorization message.

With reference to the second possible implementation manner, in a third possible implementation manner, the network device obtains the guard interval of the preset duration by using the following formula:

G = ceil((b + j + S ₃ ) /S ₄ ) * N _TQ

Where G is the guard interval of the preset duration, b is the number of resource units RE occupied by the burst identifier, and j is the number of protected resource units reserved for eliminating the time jitter of the data link layer, and S3 is two The number of protection REs reserved between the authorization messages, s4 is the number of REs in an RB, and N _TQ is the number of _TQs corresponding to an available RB.

With reference to the second aspect, or any one of the first possible implementation to the third possible implementation, in a fourth possible implementation, when the uplink signals of the multiple user equipments When the signal to noise ratios are the same or both are similar, the multiple user equipments all correspond to the same uplink logical channel; when the uplink signal SNR of some of the plurality of user equipments are the same or both are similar The part of the user equipments all correspond to the same uplink logical channel; otherwise, the multiple user equipments correspond to different uplink logical channels according to channel conditions, and the modulation template corresponding to each uplink logical channel is also different.

With reference to the second aspect, or any one of the first possible implementation manners to the fourth possible implementation manner, in the fifth possible implementation manner, the network device obtains an available RB in one OFDM frame. Before the conversion relationship between the size and the time quantum TQ, the method further includes: the network device configuring the size of the RB, and obtaining RB configuration information; where the RB includes time domain information and frequency domain information, where the frequency domain information is The method includes one or more subcarriers, and the time domain information includes multiple OFDM symbols.

With the fifth possible implementation, in a sixth possible implementation, after the network device configures the size of the RB, the method further includes: the network device adopting the RB configuration information by using a downlink physical link channel Sending to the user equipment, so that the user equipment can learn the RB configuration information.

With reference to the second aspect, or any one of the first possible implementation to the sixth possible implementation, in a seventh possible implementation, the network device is according to the following Formula to establish the conversion relationship

The N _TQ is the number of TQs corresponding to one RB, d is an OFDM frame length, n is the number of available subcarriers included in one OFDM symbol, n1 is the number of subcarriers included in one RB, and m is included in one RB. The number of OFDM symbols, al is 16 nanoseconds, and the ceil function means not less than ^d * ⁿ

The smallest integer of the value.

With reference to the second aspect, or any one of the first possible implementation to the seventh possible implementation, in an eighth possible implementation, the network device is determined according to the following steps. The authorized length of the user equipment assignment:

Determining, by the network device, the data volume of the uplink data that the user equipment needs to transmit, according to the TQ length of the data queue included in the bandwidth request message and the coaxial average line rate of the uplink logical channel corresponding to the user equipment. ;

And determining, by the network device, the authorized length allocated to the user equipment according to the determined data amount of the uplink data, an average capacity of available RBs in an OFDM frame, and the conversion relationship.

With reference to the eighth possible implementation manner, in a ninth possible implementation manner, the network device determines, according to the following formula, an authorization length allocated to the user equipment:

L _{1 =} ceil ( L ₂十 S / ^ NTQ where L1 is the authorized length allocated by the network device for the user equipment, and L2 is the authorized byte length allocated by the network device for the user equipment S2 is the forward error correction FEC overhead obtained according to the length of the grant byte, cl is the average capacity of available RBs in one OFDM frame, and N _TQ is the number of TQs corresponding to one RB.

In conjunction with the ninth possible implementation manner, in a tenth possible implementation manner, the network device determines an average capacity of available RBs in an OFDM frame according to the following formula:

Cl=ceil ( tl* ( N _TQ *16ns ) /8 );

Where cl is the average capacity of available RBs in one OFDM frame, and tl is the uplink logical signal The coaxial average line rate of the track, N _TQ is the number of TQs corresponding to an available RB.

A third aspect of the present invention provides a method for transmitting uplink data, where the method can be applied to an EPOC system, and the method includes the following steps:

The user equipment sends a bandwidth request message to the network device;

And transmitting, by the user equipment, uplink data by using an uplink logical channel corresponding to the user equipment according to the received first bandwidth from the network device;

With reference to the third aspect, in a first possible implementation manner, before the user equipment sends the bandwidth request message to the network device, the method further includes:

The user equipment places the TQ for each data queue in the bandwidth request message. According to a fourth aspect of the present invention, a data mapping method is provided, the method being applicable to an EPOC system, the method comprising the steps of:

The data link layer in the user equipment sends the uplink data according to the start time and the authorized length in the authorization message from the network device;

After the physical layer of the user equipment automatically detects the uplink data, the uplink data is subjected to at least error correction coding processing and interleaving processing, and the processed uplink data is mapped to corresponding RBs of the corresponding OFDM frame. The OFDM frame structure of the physical layer is aligned with the bandwidth allocation period of the network device.

With reference to the fourth aspect, in a first possible implementation manner, after the physical layer of the user equipment automatically detects the uplink data, performing at least error correction coding processing and interleaving processing on the uplink data, and processing the processed Mapping the uplink data to the corresponding RB of the corresponding OFDM frame, the method includes: the physical layer detecting the start time of the uplink data transmission, and obtaining an OFDM frame sequence number corresponding to the uplink data;

The physical layer converts the remaining OFDM intra-frame offset into a corresponding first RB number; the physical layer obtains a starting RB address according to the first RB quantity; Determining, by the physical layer, the second number of RBs that the uplink data needs to occupy according to the authorized length in the authorization message, to map the uplink data to the corresponding number of the second RBs according to the starting RB address. On the RB.

A fifth aspect of the present invention provides a network device, where the network device can be applied to an EPOC system, where the network device includes:

a first acquiring module, configured to receive a bandwidth request message of the user equipment;

a first allocation module, configured to allocate a first bandwidth to the user equipment according to the bandwidth request message received by the first acquiring module, so that the user equipment passes the user equipment according to the first bandwidth The uplink logical channel transmits the uplink data, where the uplink logical channel corresponding to the user equipment is an uplink logical channel in the uplink logical channel obtained by dividing the uplink physical channel.

With reference to the fifth aspect, in a first possible implementation manner, the network device further includes a second allocation module, configured to: allocate, according to the measured uplink signal to noise ratio of each user equipment, each user equipment Corresponding modulation templates, each modulation template corresponding to at least one user equipment.

With reference to the first possible implementation manner, in a second possible implementation manner, the network device further includes: a dividing module, configured to: divide the uplink physical channel into one or more uplink logics according to the determined modulation template Channel, each uplink logical channel corresponds to a modulation template.

With reference to the fifth aspect, or any one of the first possible implementation manners and the second possible implementation manner, in a third possible implementation manner, the network device is an optical line terminal or the same The axis line terminal, the user equipment is a coaxial network unit.

A sixth aspect of the present invention provides a network device, where the network device can be applied to an EPOC system, where the network device includes:

a second acquiring module, configured to obtain, respectively, a conversion relationship between a size of an available resource block RB and a time quantum TQ in an orthogonal frequency division multiplexing OFDM frame of each of the plurality of modulation templates; wherein, the conversion relationship is Established by the OFDM frame length and the size of the available RBs included in one OFDM frame, one modulation template corresponds to a specific set of modulation parameters; the network device passes multiple uplink logical channels and multiple users divided on one physical channel Device connection, one of the user settings Corresponding to an uplink logical channel, an uplink logical channel corresponding to a modulation template, and an operation module, configured to generate and send an authorization message to at least one user equipment according to the conversion relationship and a bandwidth request message from multiple user equipments The authorization message includes a first bandwidth allocated to the corresponding user equipment on the corresponding uplink logical channel, where the first bandwidth is a start time and an authorization length represented by a TQ corresponding to an integer number of RB sizes.

With reference to the sixth aspect, in a first possible implementation, the network device further includes a first allocation module, configured to: use, according to the uplink signal to noise ratio corresponding to the multiple user equipments, the multiple users The devices respectively allocate corresponding modulation templates, each modulation template corresponding to one uplink logical channel, and each uplink logical channel includes an integer number of OFDM frames.

With reference to the sixth aspect or the first possible implementation manner, in a second possible implementation manner, the operation module is further configured to: set a preset duration protection before the start time of each authorization message interval.

In combination with the second possible implementation manner, in a third possible implementation manner, the operation mode

G = ceil((b + j + S ₃ ) /S ₄ ) * N _TQ

With reference to the sixth aspect, or any one of the first possible implementation manners to the third possible implementation manner, in a fourth possible implementation manner, when the uplink signals of the multiple user equipments When the signal to noise ratios are the same or both are similar, the multiple user equipments all correspond to the same uplink logical channel; when the uplink signal SNR of some of the plurality of user equipments are the same or both are similar The part of the user equipments all correspond to the same uplink logical channel; otherwise, the multiple user equipments correspond to different uplink logical channels according to channel conditions, and the modulation template corresponding to each uplink logical channel is also different. With reference to the sixth aspect, or any one of the first possible implementation manners to the fourth possible implementation manner, in a fifth possible implementation manner, the network device further includes a configuration module, Configuring the RB size to obtain RB configuration information, where the RB includes time domain information and frequency domain information, where the frequency domain information includes one or more subcarriers, and the time domain information includes multiple OFDM symbol.

With reference to the fifth possible implementation manner, in a sixth possible implementation, the network device further includes: a first sending module, configured to: send the RB configuration information to the user equipment by using a downlink physical link channel So that the user equipment can learn the RB configuration information.

With reference to the sixth aspect, or any one of the first possible implementation manners to the sixth possible implementation manner, in a seventh possible implementation manner, the network device further includes an establishing module, The conversion relationship is established according to the following formula:

The smallest integer of the value.

With reference to the sixth aspect, or any one of the first possible implementation manners to the seventh possible implementation manner, in the eighth possible implementation manner, the second obtaining module is specifically configured to: Obtaining an OFDM physical layer parameter by reading the management data input/output MDIO register, where the OFDM physical layer parameter includes at least the conversion relationship; or obtaining the OFDM physical layer parameter by extending an operation management and maintaining an eOAM message, the OFDM physics At least the conversion relationship is included in the layer parameters.

With reference to the sixth aspect, or any one of the first possible implementation to the eighth possible implementation, in a ninth possible implementation, the operating module is configured to determine The authorization length allocated by the user equipment is specifically: according to the bandwidth request message packet Determining the TQ length of the data queue and the coaxial average line rate of the uplink logical channel corresponding to the user equipment, determining the data amount of the uplink data that the user equipment needs to transmit; according to the determined data volume of the uplink data And an average capacity of the available RBs in an OFDM frame and the conversion relationship, and determining the authorized length allocated to the user equipment.

With reference to the ninth possible implementation manner, in the tenth possible implementation manner, the operation module is specifically configured to determine an authorization length allocated to the user equipment according to the following formula:

L _{1 =} ceil ( ( L ₂ ten S / ^ NTQ

L1 is the authorized length allocated by the network device to the user equipment, L2 is an authorized byte length allocated by the network device to the user equipment, and s2 is obtained according to the length of the authorization byte. To the error correction FEC overhead, cl is the average capacity of available RBs in one OFDM frame, and N _TQ is the number of TQs corresponding to one RB.

With reference to the tenth possible implementation manner, in an eleventh possible implementation manner, the operation module is further configured to determine an average capacity of available RBs in an OFDM frame according to the following formula:

Cl=ceil ( tl* ( N _TQ *16ns ) /8 );

Where, cl is the average capacity of available RBs in one OFDM frame, t1 is the coaxial average line rate of the uplink logical channel, and N _TQ is the number of TQs corresponding to an available RB.

A seventh aspect of the present invention provides a user equipment, where the user equipment is applicable to an EPOC system, where the user equipment includes:

a second sending module, configured to send a bandwidth request message to the network device;

a first transmission module, configured to transmit uplink data by using an uplink logical channel corresponding to the user equipment according to the received first bandwidth from the network device, where the uplink logical channel corresponding to the user equipment is an uplink physical channel One of the obtained uplink logical channels.

With reference to the seventh aspect, in a first possible implementation, the user equipment further includes a processing module, configured to: place a TQ for each data queue in the bandwidth request message.

According to an eighth aspect of the present invention, a user equipment is provided, and the user equipment can be applied to an EPOC. The user equipment includes:

a data link layer module, configured to send uplink data according to a start time and an authorized length in an authorization message from the network device;

a physical layer module, configured to automatically detect the uplink data, perform at least error correction coding processing and interleaving processing on the uplink data, and map the processed uplink data to corresponding RBs of corresponding OFDM frames; The OFDM frame structure of the physical layer module is aligned with a bandwidth allocation period of the network device.

With reference to the eighth aspect, in a first possible implementation, the physical layer module is specifically configured to: detect the start time of the uplink data transmission, and obtain an OFDM frame number corresponding to the uplink data; The OFDM intra-frame offset is converted into a corresponding first RB number; the initial RB address is obtained according to the first RB quantity; and the second RB quantity that the uplink data needs to occupy is determined according to the authorization length in the authorization message, And mapping the uplink data to the corresponding number of RBs of the second RB according to the starting RB address.

A ninth aspect of the present invention provides a network device, where the network device can be applied to an EPOC system, where the network device includes:

a first acquiring interface, configured to receive a bandwidth request message of the user equipment;

a first processor, configured to allocate a first bandwidth to the user equipment according to the bandwidth request message received by the first acquiring interface, so that the user equipment passes the user equipment according to the first bandwidth. The uplink logical channel transmits the uplink data, where the uplink logical channel corresponding to the user equipment is an uplink logical channel in the uplink logical channel obtained by dividing the uplink physical channel.

With reference to the ninth aspect, in a first possible implementation, the network device further includes a second processor, where the second processor is configured to: according to the measured uplink signal to noise ratio of each user equipment, Each user equipment is assigned a corresponding modulation template, and each modulation template corresponds to at least one user equipment.

With reference to the first possible implementation manner, in a second possible implementation manner, the second processor is further configured to: divide the uplink physical channel into one or more uplink logical channels according to the determined modulation template, Each uplink logical channel corresponds to a modulation template. With reference to the ninth aspect, or any one of the first possible implementation manners and the second possible implementation manner, in a third possible implementation manner, the network device is an optical line terminal or the same The axis line terminal, the user equipment is a coaxial network unit.

A tenth aspect of the present invention provides a network device, where the network device can be applied to an EPOC system, where the network device includes:

a second obtaining interface, configured to obtain a conversion relationship between a size and a time quantum TQ of an available resource block RB in an OFDM frame;

a third processor, configured to generate M authorization messages according to the M bandwidth request messages from the M user equipments and the conversion relationship obtained by the second obtaining module, and send the information to the M user equipments The M authorization message, where the authorization message includes a first bandwidth allocated for the corresponding user equipment, where the first bandwidth is a start time and an authorization length represented by TQ; wherein, when M is not less than 2, A guard interval of a preset duration is set between the start times in each of the M grant messages.

With reference to the tenth aspect, in a first possible implementation, the third processor is further configured to: configure a size of the RB, and obtain RB configuration information; where the RB includes time domain information and frequency domain information. The frequency domain information includes one or more subcarriers, and the time domain information includes multiple OFDM symbols.

With reference to the first possible implementation manner, in a second possible implementation manner, the network device further includes: a first sending interface, configured to: send the RB configuration information to the user equipment by using a downlink physical link channel So that the user equipment can learn the RB configuration information.

With reference to the tenth aspect, or any one of the first possible implementation manners and the second possible implementation manner, in a third possible implementation manner, the third processor is further configured to: The establishing the conversion relationship is specifically: establishing the conversion relationship according to an OFDM frame length under each modulation template and a size of available RBs included in one OFDM frame.

With reference to the third possible implementation manner, in a fourth possible implementation manner, the third processor is further configured to establish the conversion relationship according to the following formula: The N _TQ is the number of TQs corresponding to an available RB, d is an OFDM frame length, n is the number of available subcarriers included in one OFDM symbol, n1 is the number of subcarriers included in one RB, and m is an RB. The number of OFDM symbols, al is 16 nanoseconds, and the ceil function indicates that the smallest integer is not less than the value.

With reference to the tenth aspect, or any one of the first possible implementation to the fourth possible implementation, in a fifth possible implementation, the third acquiring interface is specifically used to: Obtaining an OFDM physical layer parameter by reading the management data input/output MDIO register, where the OFDM physical layer parameter includes at least the conversion relationship; or obtaining the OFDM physical layer parameter by extending an operation management and maintaining an eOAM message, the OFDM physics At least the conversion relationship is included in the layer parameters.

With reference to the tenth aspect, or any one of the first possible implementation to the fifth possible implementation, in a sixth possible implementation, the third processor is used to determine Determining, by the user equipment, the authorization length, according to the TQ length of the data queue included in the bandwidth request message and the coaxial average line rate of the uplink logical channel corresponding to the user equipment, determining the user The amount of data of the uplink data that the device needs to transmit; determining the authorized length allocated for the user equipment according to the determined data amount of the uplink data, the average capacity of available RBs in one OFDM frame, and the conversion relationship.

In conjunction with the sixth possible implementation, in a seventh possible implementation, the third processor is specifically configured to determine an authorized length allocated to the user equipment according to the following formula:

L _{1 =} ceil ( L ₂十 S / ^ NTQ where L1 is the authorized length allocated by the network device for the user equipment, and L2 is the authorized byte length allocated by the network device for the user equipment S2 is the forward error correction FEC overhead obtained according to the length of the grant byte, cl is the average capacity of available RBs in one OFDM frame, and N _TQ is the number of TQs corresponding to one RB. In conjunction with the seventh possible implementation, in an eighth possible implementation, the third processor is further configured to determine an average capacity of available RBs in an OFDM frame according to the following formula:

Cl=ceil ( tl* ( N _TQ *16ns ) /8 );

With reference to the tenth aspect, or any one of the first possible implementation to the eighth possible implementation, in a ninth possible implementation, the third processor is further configured to The following formula obtains the guard interval of the preset duration:

G = ceil((b + j + S ₃ ) /S ₄ ) * N _TQ

With reference to the tenth aspect, or any one of the first possible implementation manners to the ninth possible implementation manner, in the tenth possible implementation manner, the guard interval of the preset duration is at least The transmission duration of an RB.

According to an eleventh aspect of the present invention, a user equipment is provided, where the user equipment is applicable to an EPOC system, where the user equipment includes:

a second sending interface, configured to send a bandwidth request message to the network device;

a fourth processor, configured to transmit uplink data by using an uplink logical channel corresponding to the user equipment according to the received first bandwidth from the network device, where the uplink logical channel corresponding to the user equipment is an uplink physical channel One of the obtained uplink logical channels.

In conjunction with the eleventh aspect, in a first possible implementation, the fourth processor is further configured to: place a TQ for each data queue in the bandwidth request message.

A twelfth aspect of the present invention provides a user equipment, where the user equipment may be applied to an EPOC system, where the user equipment includes: a fifth processor, configured to send uplink data according to a start time and an authorized length in an authorization message from the network device;

a sixth processor, configured to automatically detect the uplink data, perform at least error correction coding processing and interleaving processing on the uplink data, and map the processed uplink data to corresponding RBs of the corresponding OFDM frame. The OFDM frame structure of the physical layer module is aligned with the bandwidth allocation period of the network device.

With reference to the twelfth aspect, in a first possible implementation, the sixth processor is specifically configured to: detect the start time of the uplink data transmission, and obtain an OFDM frame sequence number corresponding to the uplink data; Converting the remaining OFDM intra-frame offset to the corresponding first RB number; obtaining a starting RB address according to the first RB quantity; determining, according to the authorization length in the authorization message, the second RB that the uplink data needs to occupy The quantity is used to map the uplink data to the corresponding number of RBs of the second RB according to the starting RB address.

With reference to the first possible implementation manner, in a second possible implementation, the user equipment further includes a second sending interface, configured to: according to the starting RB address and the second RB quantity, The uplink logical channel transmits the uplink data.

In a thirteenth aspect of the invention, an EPOC system is provided, comprising:

a network device, configured to obtain a conversion relationship between a size of a resource block RB and a time quantum TQ in an orthogonal frequency division multiplexing OFDM frame of each of the plurality of modulation templates, where the conversion relationship is according to an OFDM frame Long and one size of available RBs included in one OFDM frame, one modulation template corresponds to a specific set of modulation parameters; the network device is connected to multiple user equipments by multiple uplink logical channels divided on one physical channel One user equipment corresponds to one uplink logical channel, and one uplink logical channel corresponds to one modulation template. According to the conversion relationship and the bandwidth request message from multiple user equipments, an authorization message is generated and sent to at least one user equipment. The authorization message includes a first bandwidth allocated by the corresponding user equipment on the corresponding uplink logical channel, where the first bandwidth is a start time and an authorization length represented by a TQ corresponding to an integer number of RB sizes;

The user equipment is configured to start according to an initiation time in an authorization message from the network device Sending uplink data by the authorized length; after automatically detecting the uplink data, performing at least error correction coding processing and interleaving processing on the uplink data, and mapping the processed uplink data to corresponding

The corresponding RB of the OFDM frame; wherein the OFDM frame structure of the physical layer module is aligned with the bandwidth allocation period of the network device.

The bandwidth allocation method in the embodiment of the present invention may be applied to an Ethernet passive optical network protocol coaxial cable physical layer EPOC system, and the method may include the following steps: The network device separately obtains orthogonality of each modulation template in multiple modulation templates. The conversion relationship between the size of the available resource block RB and the time quantum TQ in the frequency division multiplexing OFDM frame; wherein the conversion relationship is established according to the OFDM frame length and the size of the available RBs included in one OFDM frame, and one modulation template corresponds to The network device is connected to multiple user equipments by using multiple uplink logical channels divided on one physical channel, where one user equipment corresponds to one uplink logical channel, and one uplink logical channel corresponds to one modulation template. The network device generates and sends at least one authorization message to the at least one user equipment according to the conversion relationship and the bandwidth request message from the multiple user equipments, where the authorization message is included in the corresponding uplink of the corresponding user equipment. a first bandwidth allocated on the logical channel, said To initiate a bandwidth of an integer number of time TQ characterized RB length corresponding to the size and authorization.

In the embodiment of the present invention, the network device may obtain a conversion relationship between a size of an available RB and a TQ in each modulation template, where the network device may generate according to the conversion relationship and a bandwidth request message from multiple user equipments. And transmitting, to the at least one user equipment, an authorization message, according to the conversion relationship, the one-dimensional time domain information can be converted into two-dimensional time domain information and frequency domain information, so that the network device is equivalent to The bandwidth allocation of the user equipment is indicated by the two-dimensional time domain information and the frequency domain information, which solves the technical problem that cannot be solved in the prior art. DRAWINGS

FIG. 1 is a resource allocation manner of OFDMA in the prior art;

2 is a schematic structural diagram of an EPOC system according to an embodiment of the present invention;

3 is a main flowchart of a bandwidth allocation method according to an embodiment of the present invention; 4 is a main flowchart of a bandwidth allocation method according to an embodiment of the present invention;

FIG. 5 is a main flowchart of a method for transmitting uplink data according to an embodiment of the present invention;

6 is a main flowchart of a data mapping method according to an embodiment of the present invention;

7 is a structural diagram of a network device according to an embodiment of the present invention;

FIG. 8 is a structural diagram of a network device according to an embodiment of the present invention;

FIG. 9 is a structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 10 is a structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 11 is a structural diagram of a network device according to an embodiment of the present invention;

FIG. 12 is a structural diagram of a network device according to an embodiment of the present invention;

FIG. 13 is a structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 14 is a structural diagram of a user equipment according to an embodiment of the present invention;

Figure 15 is a structural diagram of an EPOC system in an embodiment of the present invention. detailed description

In the embodiment of the present invention, the network device may separately obtain available RBs in each modulation template. The conversion relationship between the size and the TQ, the network device may generate and send an authorization message to the at least one user equipment according to the conversion relationship and the bandwidth request message from the multiple user equipments, according to the conversion relationship, The one-dimensional time domain information is converted into two-dimensional time domain information and frequency domain information, so that the network device is equivalent to indicating the bandwidth allocation of the user equipment by using two-dimensional time domain information and frequency domain information. The technical problems that cannot be solved in the prior art are solved.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The techniques described herein can be used in fiber-optic coaxial convergence access systems, such as fiber-optic transmission using EPON technology and coaxial side using OFDM-modulated physical layers.

This article describes various aspects in conjunction with CLT and / or OLT and / or CNU.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association that describes the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B these three situations. In addition, the character "/" in this article generally means that the contextual object is an "or" relationship.

The network architecture in the embodiment of the present invention is mainly EPOC, so the following first introduces the EPOC architecture.

As shown in Figure 2, it is a schematic diagram of the EPOC architecture. The network management system 201, the configuration system 202, the DPOE 203, the optical network unit 204, the fiber-optic coaxial unit 205, and the coaxial network unit 206 can be included in FIG.

The network management system 201 may be an NMS (Network Management System), and the configuration system 202 may be a Provisioning System. The optical network unit 204 may be an ONU ( The optical network unit 205 may be an FCU (Fiber Coax Unit), and the coaxial network unit 206 may specifically be a CNU. Among them, there are two in Figure 2 The optical network unit 204, the two optical fiber coaxial units 205, and the two coaxial network units 206 are illustrated as an example, but it does not mean that only the number of the optical network units are included in the EPOC system. 204. The fiber coaxial unit 205 and the coaxial network unit 206 may be set according to actual needs.

In FIG. 2, the DPOE 203 and the optical network unit 204 and the optical fiber coaxial unit 205 may be connected by an optical fiber, and the optical fiber coaxial unit 205 and the coaxial network unit 206 may be coaxial. The cables are connected.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

Embodiment 1

As shown in FIG. 3, an embodiment of the present invention provides a bandwidth allocation method, where the method can be applied to an EPOC system, and the main processes of the method are as follows:

Step 301: The network device receives a bandwidth request message of the user equipment.

Specifically, the method in Embodiment 1 can be applied to the network device in the EPOC system.

In the embodiment of the present invention, the architecture diagram of the EPOC system may be as shown in FIG. 2.

In the embodiment of the present invention, the network device may be, for example, a CLT, or may be an OLT, and the user equipment may be, for example, a CNU.

The user equipment may first send the bandwidth request message to the network device.

In the embodiment of the present invention, for example, the bandwidth request message may specifically be a REPORT message sent by the CNU to the CLT or the OLT. For example, the REPORT message may include a bandwidth request reported by the user equipment.

Each user equipment may have multiple data queues, and each data queue corresponds to a different bandwidth request, and the corresponding user equipment may separately report the bandwidth request required for each data queue. For example, if there are seven data queues in the user equipment A, the user equipment A can report the bandwidth requests required by the seven data queues separately. For example, the user equipment A can separately report the bandwidth requests required by the seven data queues. For example, among the 7 data queues, data queue 1 and data queue 2 have bandwidth requests, while other data queues do not. Wide request. Then, the user equipment A can convert the length of the data queue 1 into TQ (time quantum) according to the line transmission rate, and convert the length of the data queue 2 into TQ, and then convert the two converted The result is added to the bandwidth request message.

The user equipment may send the bandwidth request message to the network device, that is, the network device may receive the bandwidth request message from the user equipment.

Preferably, in the embodiment of the present invention, before receiving the bandwidth request message of the user equipment, the network device may first allocate a corresponding modulation to each user equipment according to the measured uplink signal to noise ratio corresponding to each user equipment. The template (that is, the MMP (Multiple Modulation Template), which is called a modulation template in the embodiment of the present invention), each modulation template may correspond to at least one user equipment.

For example, each user equipment may send an uplink sounding signal to the network device, and the network device may measure and determine an uplink signal signal to noise ratio of the corresponding user equipment according to the corresponding uplink sounding signal, so that the uplink signal signal to noise ratio may be Similar user equipment is assigned to a modulation template.

Preferably, in the embodiment of the present invention, after the network device allocates a corresponding modulation template for each user equipment, the network device may divide the uplink physical channel between the network device and the user equipment according to the determined modulation template. For one or more uplink logical channels, the number of uplink logical channels and the number of modulation templates may be the same, that is, the modulation template and the uplink logical channel may be in a corresponding relationship. An uplink logical channel may correspond to one or more OFDM frames.

After the network device divides one or more uplink logical channels, each uplink logical channel corresponds to one modulation template, and one modulation template may correspond to at least one user equipment, and thus is equivalent to each user equipment. Assigned to different uplink logical channels.

In the embodiment of the present invention, an uplink logical channel may correspond to the at least one user equipment, and then each user equipment may transmit uplink data on the corresponding uplink logical channel.

After the network device allocates each user equipment to a different uplink logical channel, the corresponding user equipment can be notified by the corresponding physical layer message, so that the user equipment can know which uplink logical channel corresponds to the user equipment.

In this way, the at least one user equipment transmits the uplink data to the first network device through an uplink logical channel, and then, no matter how many uplink logical channels correspond to each other OFDM frames, these OFDM frames are only one modulation template, and there is no problem that an OFDM frame in the prior art may correspond to different modulation templates. Naturally, all user equipments can normally transmit uplink data and ensure communication. The process proceeds normally.

In the embodiment of the present invention, the network device may perform uplink scheduling and dynamic bandwidth allocation according to the divided uplink logical channels, where each uplink logical channel may include one or more OFDM frames.

In the embodiment of the present invention, before obtaining the bandwidth request message, the network device may first obtain a conversion relationship between the size of the available RBs in an OFDM frame and the TQ.

The available RBs in the embodiments of the present invention may refer to RBs in an OFDM frame that can be used to carry data. For example, the off subcarrier and the subcarrier corresponding to the uplink physical link channel belong to the unavailable resource, that is, belong to the unavailable RB.

Preferably, in the embodiment of the present invention, the network device may first establish the conversion relationship before obtaining the conversion relationship.

Preferably, in the embodiment of the present invention, the network device may establish the conversion relationship according to an OFDM frame length and a size of an available RB included in one OFDM frame.

Step 302: The network device allocates a first bandwidth to the user equipment according to the bandwidth request message, so that the user equipment transmits uplink data by using an uplink logical channel corresponding to the user equipment according to the first bandwidth. The uplink logical channel corresponding to the user equipment is an uplink logical channel in an uplink logical channel obtained by dividing the uplink physical channel.

After receiving the bandwidth request message, the network device may allocate the first bandwidth to the user equipment according to the bandwidth request message, so that the user equipment may pass the first bandwidth according to the first bandwidth. The uplink logical channel corresponding to the user equipment transmits the uplink data.

Specifically, in the embodiment of the present invention, after receiving the bandwidth request message, the network device may generate and send an authorization message to the user equipment, where the authorization message may carry the first bandwidth.

Preferably, in the embodiment of the present invention, the authorization message may be, for example, a GATE (gate frame) message sent by the CLT or the OLT to the CNU. In this embodiment of the present invention, the first bandwidth may be a start time and an authorized length represented by a TQ.

Preferably, in the embodiment of the present invention, the physical layer frame structure may be aligned with the DBA (dynamic bandwidth allocation) period of the network device.

Embodiment 2

Referring to FIG. 4, an embodiment of the present invention provides a bandwidth allocation method, where the method can be applied to an EPOC system, and the main processes of the method are as follows:

Step 401: The network device obtains a conversion relationship between the size of the available resource block RB and the time quantum TQ in the orthogonal frequency division multiplexing OFDM frame of each of the plurality of modulation templates, where the conversion relationship is according to the OFDM frame. Long and one size of available RBs included in one OFDM frame, one modulation template corresponds to a specific set of modulation parameters; the network device is connected to multiple user equipments by multiple uplink logical channels divided on one physical channel One user equipment corresponds to one uplink logical channel, and one uplink logical channel corresponds to one modulation template.

Specifically, the method in Embodiment 2 can be applied to the network device in the EPOC system.

In the embodiment of the present invention, the network device may first obtain the conversion relationship between the size of the available RBs and the TQ in the next OFDM frame of different modulation templates.

In the embodiment of the present invention, one modulation template may correspond to a specific set of modulation parameters, and thus, different modulation templates may correspond to different modulation parameters.

In the embodiment of the present invention, the conversion relationship corresponding to different modulation templates may be different. Therefore, the network device may obtain the conversion relationship under different modulation templates respectively.

Preferably, the uplink scheduler and the dynamic bandwidth allocation unit in the network device can obtain the conversion relationship under different modulation templates.

For example, the network device may obtain the conversion relationship by reading an MDIO (Management Data Input/Output) register, or the network device may obtain the conversion relationship through an eOAM (Extended Operation Management and Maintenance) message. The OFDM physical layer parameter information may include at least the conversion relationship, or the network device may obtain the OFDM physical layer parameter by using an eOAM message, where the OFDM physical layer parameter information may include at least the conversion relationship.

Preferably, in the embodiment of the present invention, the network device may establish the conversion relationship according to the following formula:

In formula 1, N _TQ can be the number of TQs corresponding to one available RB, d can be one OFDM frame length, n can be the number of available subcarriers included in one OFDM symbol, and nl can be the number of subcarriers included in one RB. m can be the number of OFDM symbols included in one RB, al can be 16 (in nanoseconds), and ceil is a function that can represent the smallest integer that is not less than the value.

In the embodiment of the present invention, the available subcarriers may refer to subcarriers that can be used for data and pilots after removing the subcarriers corresponding to the off subcarrier and the uplink physical link channel in the OFDM subcarrier.

After the network device establishes the correspondence, the corresponding relationship may be stored, for example, may be stored in an MDIO register, or may be added to an eOAM message, when the network device needs it. Get it.

In the embodiment of the present invention, for an OFDM frame, the size of each RB included in the OFDM frame may be configured by the network device, and multiple RBs may be included in one OFDM frame to carry burst marks. Characters, data, etc., and can eliminate the effects of time jitter. In the embodiment of the present invention, RBs of different sizes may be referred to as RBs of different kinds. After the network device configures the size of each RB, the RB configuration information can be obtained.

One RB may include time domain information and frequency domain information, that is, the RB may be a two-dimensional information. The frequency domain information may include one or more subcarriers, and the time domain information may include multiple OFDM symbols.

Further, in another embodiment of the present invention, after the network device configures the size of each RB in each OFDM frame, the RB configuration information may be obtained, and the network device may pass the RB configuration information through the downlink. The physical link channel is sent to the user equipment, for example, the RB configuration information may be written into a corresponding MDIO register of the user equipment, so that the user equipment can obtain the RB by reading a corresponding MDIO register. Configuration information.

Preferably, in the embodiment of the present invention, before obtaining the conversion relationship, the network device may first allocate corresponding modulation for each user equipment according to the measured uplink signal to noise ratio corresponding to each user equipment. A template, each modulation template may correspond to at least one user equipment, and each user equipment corresponds to one modulation template.

For example, each user equipment may send an uplink sounding signal to the network device, and the network device may measure and determine an uplink signal signal to noise ratio of the corresponding user equipment according to the corresponding uplink sounding signal, so that the uplink signal signal to noise ratio may be The same or similar user equipment is assigned to a modulation template.

Optionally, if the uplink signal to noise ratios of the multiple user equipments are the same or both, the network device may allocate the same modulation template to the multiple user equipments.

Optionally, if the uplink signal to noise ratios of the user equipments of the plurality of user equipments are the same or both, the network equipment may allocate the same modulation template to the part of the user equipment, The remaining user equipments of the user equipments are respectively assigned different modulation templates.

Optionally, if the uplink signal to noise ratios of the two user equipments are the same or similar, the network device may allocate different modulations to each of the multiple user equipments. template.

The network device may divide the physical channel between the network device and the multiple user equipments into corresponding uplink logical channels according to the number of modulation templates, and the number of allocated uplink logical channels may be the same as the number of modulation templates. That is, each modulation template corresponds to one uplink logical channel, and each uplink logical channel may include an integer number of OFDM frames, and the integer OFDM frames may be An OFDM frame corresponding to the modulation template. In this way, an OFDM frame only corresponds to one modulation template, and there is no problem that one OFDM frame in the prior art may correspond to different modulation templates. Naturally, all CNUs can automatically map uplink data to RBs in OFDM. The transmission is carried out to ensure that the communication process is carried out normally.

In the embodiment of the present invention, when the uplink signal SNR of the multiple user equipments are the same or both, the multiple user equipments all correspond to the same uplink logical channel; When the uplink signal to noise ratios of the user equipments are the same or both are similar, the part of the user equipments all correspond to the same uplink logical channel; otherwise, the multiple user equipments are grouped according to channel conditions to correspond to different uplink logical channels, and each The modulation templates corresponding to the uplink logical channels are also different. Specifically:

Optionally, if the uplink signal to noise ratios of the multiple user equipments are the same or both, the multiple user equipments may all correspond to the same uplink logical channel.

Optionally, if the uplink signal to noise ratios of the user equipments of the multiple user equipments are the same or both, the part of the user equipments may all correspond to the same uplink logical channel, and the multiple users The remaining user equipments in the device may correspond to other different uplink logical channels, respectively.

Optionally, if no uplink signal SNR of the two user equipments is the same or similar, the multiple user equipments may respectively correspond to different uplink logical channels.

In the embodiment of the present invention, the signal to noise ratios of the two uplink signals are similar, which may be: the difference between the signal to noise ratios of the two uplink signals is within a preset difference range, or may be two uplink signal signal to noise. The ratio is proportional to the preset ratio, and so on.

The network device is configured to divide multiple uplink logical channels (wherein, according to different situations, the multiple uplink logical channels may all be the same uplink logical channel, or may be different uplink logical channels respectively), because each uplink The logical channel corresponds to one modulation template, and one modulation template may correspond to at least one user equipment, and thus is equivalent to assigning each user equipment to a different uplink logical channel. In the embodiment of the present invention, an uplink logical channel may correspond to the at least one user equipment, and then each user equipment may transmit uplink data on the corresponding uplink logical channel.

In this way, the at least one user equipment transmits the uplink data to the network device through a corresponding uplink logical channel, and then, regardless of how many OFDM frames an uplink logical channel corresponds to, these OFDM frames correspond to only one OFDM frame. The modulation template does not have the problem that an OFDM frame in the prior art may correspond to different modulation templates, and naturally, all user equipments can normally transmit uplink data to ensure normal communication process.

In the embodiment of the present invention, the network device may perform uplink scheduling and dynamic bandwidth allocation according to the divided uplink logical channels.

Step 402: The network device generates and sends an authorization message to the at least one user equipment according to the conversion relationship and the bandwidth request message from the multiple user equipments, where the authorization message is included in the corresponding user equipment. The first bandwidth allocated on the uplink logical channel, where the first bandwidth is a start time and an authorized length represented by a TQ corresponding to an integer number of RB sizes.

In the embodiment of the present invention, the first bandwidth may be a start time and an authorization length represented by a TQ.

In the embodiment of the present invention, the network device may separately generate the authorization message corresponding to different user equipments according to bandwidth request messages sent by different user equipments.

For example, the network device generates the at least one authorization message, and the network device may separately send the at least one authorization message to at least one user equipment, where one user equipment corresponds to an authorization message. A first bandwidth allocated for the respective user equipment may be included in each authorization message. In the embodiment of the present invention, the first bandwidth may be the start time represented by a TQ corresponding to an integer number of RB sizes and the authorized length allocated for a corresponding user equipment. With the authorized length. For example, the network device may allocate the authorization length to the corresponding user equipment by using the following method: the network device may according to the TQ length of the data queue included in a bandwidth request message and the uplink logical channel corresponding to the corresponding user equipment. The coaxial average line rate determines the amount of data of the uplink data that the user equipment needs to transmit. After determining the data amount of the uplink data that the user equipment needs to transmit, the network device determines, according to the determined data volume of the uplink data, an average capacity of available RBs in an OFDM frame, and the conversion relationship, the user equipment is determined as the user equipment. The authorized length of the assignment.

Specifically, the network device may determine, according to the following formula, the authorized length allocated for one user equipment:

L ₁₌ ceil ( L ₂ s / ^ NTQ ( 2 ) In Equation 2, L1 may be the authorized length allocated by the network device to the user equipment, and L2 may be the network device as the user The length of the grant byte allocated by the device, s2 may be the FEC (Forward Error Correction) overhead obtained according to the length of the grant byte, and cl may be the average capacity of available RBs in one OFDM frame.

The network device may determine the amount of uplink data that the user equipment needs to transmit according to the TQ length of the data queue included in the bandwidth request message and the coaxial average line rate of the uplink logical channel corresponding to the corresponding user equipment. , that is, determining the length of the reported byte authorization byte of the user equipment.

Preferably, in the embodiment of the present invention, the network device may determine an average capacity of available RBs in an OFDM frame according to the following formula, that is, determine cl:

Cl=ceil ( tl* ( N _TQ *16ns ) /8 ); ( 3 ) In Equation 3, tl may represent the coaxial average line rate of the corresponding uplink logical channel, and N _TQ may represent the number of TQs corresponding to one available RB. The reason for dividing by 8 is to convert the unit from bits to bytes.

Preferably, in the embodiment of the present invention, the network device is configured to generate the at least one authorization message. And setting a guard interval of a preset duration before the start time in each of the at least one authorization message.

Preserving the guard interval of the preset duration before each start time, may be used for overhead such as physical layer burst tags, and may eliminate conflicts in physical layer resource mapping caused by channel unevenness and time stamp jitter. And other issues. Preset time protection interval:

G = ceil((b + j + S ₃ ) /S ₄ ) * N _TQ ( 4 ) In Equation 4, G may represent the guard interval of the preset duration, and b may represent the RE occupied by the burst identifier ( The number of resource units, j can be expressed as the number of protection resource units reserved for eliminating the time jitter of the data link layer, s3 can represent the number of protection REs reserved between the two authorization messages, and s4 can represent an RB. With the number of REs, N _TQ can represent the number of TQs corresponding to one available RB.

In the embodiment of the present invention, the guard interval of the preset duration is set before the start time in each authorization message, which can be used for physical layer burst overhead, and the data link layer can be eliminated as much as possible. The effect of time jitter.

Preferably, in the embodiment of the present invention, the physical layer frame structure requirement of the user equipment is aligned with the DBA (dynamic bandwidth allocation) period of the network device.

Embodiment 3

Referring to FIG. 5, an embodiment of the present invention provides a method for transmitting uplink data, where the method can be applied to an EPOC system, and the main processes of the method are as follows:

Step 501: The user equipment sends a bandwidth request message to the network device.

Specifically, the method in Embodiment 3 can be applied to the user equipment in the EPOC system.

In the embodiment of the present invention, when the user equipment needs to transmit uplink data, the bandwidth request message may be sent to the network device. Preferably, in the embodiment of the present invention, before sending the bandwidth request message to the network device, the user equipment may first place the TQ for each data queue in the bandwidth request message.

Each user equipment may have multiple data queues, and each data queue corresponds to a different bandwidth request, and the corresponding user equipment may separately report the bandwidth request required for each data queue. For example, if there are seven data queues in the user equipment A, the user equipment A can report the bandwidth requests required by the seven data queues separately. For example, the user equipment A can separately report the bandwidth requests required by the seven data queues. For example, in the seven data queues, data queue 1 and data queue 2 have bandwidth requests, while other data queues do not have bandwidth requests. Then, the user equipment A can convert the length of the data queue 1 into TQ (time quantum) according to the line transmission rate, and convert the length of the data queue 2 into TQ, and then convert the two converted The result is added to the bandwidth request message.

After receiving the bandwidth request message, the network device may send an authorization message to the user equipment according to the bandwidth request message, where the authorization message may include the first one allocated for the user equipment. Bandwidth, for example, the first bandwidth may be a start time and an authorized length characterized by TQ.

Step 502: The user equipment transmits uplink data by using an uplink logical channel corresponding to the user equipment according to the received first bandwidth from the network device, where the uplink logical channel corresponding to the user equipment is an uplink physical channel. One of the obtained uplink logical channels.

In the embodiment of the present invention, after receiving the bandwidth request message, the network device may send an authorization message to the user equipment according to the bandwidth request message, where the authorization message may include the user equipment. The first bandwidth allocated, for example, the first bandwidth may be a start time and an authorized length characterized by TQ.

After receiving the authorization message, the user equipment may transmit the uplink data by using an uplink logical channel corresponding to the first bandwidth.

Preferably, in the embodiment of the present invention, the network device receives the band of the user equipment. Before the wide request message, each user equipment may be allocated a corresponding modulation template according to the measured uplink signal to noise ratio of each user equipment, and each modulation template may correspond to at least one user equipment.

Preferably, in the embodiment of the present invention, the guard interval of the preset duration may be a transmission duration of at least one RB. Further, the guard interval of the preset duration may be a transmission duration of an integer number of RBs.

Embodiment 4

Referring to FIG. 6, an embodiment of the present invention provides a data mapping method, where the method can be applied to an EPOC system, and the main processes of the method are as follows:

Step 601: The data link layer in the user equipment sends the uplink data according to the start time and the authorized length in the authorization message from the network device. Specifically, the method in Embodiment 4 can be applied to the user equipment in the EPOC system.

In the embodiment of the present invention, the user equipment may first send a bandwidth request message to the network device, and after receiving the bandwidth request message, the network device may send the bandwidth request message to the user equipment according to the bandwidth request message. And an authorization message, where the authorization message may include the first bandwidth allocated for the user equipment, for example, the first bandwidth may be a start time and an authorization length represented by a TQ.

Specifically, in the embodiment of the present invention, after receiving the authorization message, the data link layer in the user equipment may send the uplink data according to a start time and an authorization length in the authorization message. .

In the embodiment of the present invention, the data link layer first sends the uplink data to a physical layer of the user equipment, and then the physical layer performs transmission.

Specifically, in the embodiment of the present invention, the data link layer needs to send the uplink data to the physical layer in advance of the start time, because the start time carried in the authorization message is The time when the uplink data arrives at the physical layer is performed. Therefore, the data link layer needs to be sent before the start time to ensure that the time when the uplink data reaches the physical layer is the start time.

Step 602: After the physical layer of the user equipment automatically detects the uplink data, perform at least error correction coding processing and interleaving processing on the uplink data, and map the processed uplink data to corresponding OFDM frames. The RB frame structure of the physical layer is aligned with the bandwidth allocation period of the network device.

In the embodiment of the present invention, in order to make the technical solution feasible, the OFDM frame structure of the physical layer is required to be aligned with the bandwidth allocation period or other scheduling period of the network device. Specifically, the uplink OFDM frame structure of the physical layer may be aligned with a bandwidth allocation period or other scheduling period of the network device. In the embodiment of the present invention, the physical layer may automatically detect the uplink data, and after receiving the uplink data from the data link layer, the uplink data may be subjected to corresponding error correction coding (FEC). The processing may be performed on the corresponding RB of the corresponding OFDM frame, that is, mapped to the corresponding RB of the OFDM frame corresponding to the user equipment.

Specifically, in the embodiment of the present invention, after the physical layer automatically detects the uplink data, the uplink data is subjected to at least error correction coding processing and interleaving processing, and the processed uplink data is mapped to a corresponding OFDM. The corresponding RB of the frame may include: the physical layer detects a start time of the uplink data transmission, obtains an OFDM frame number corresponding to the uplink data, and the physical layer converts the remaining OFDM intraframe offset into And corresponding to the first RB quantity, the physical layer obtains a starting RB address according to the first RB quantity, and the physical layer determines, according to the authorized length in the authorization message, the second RB quantity that the uplink data needs to occupy, And mapping the uplink data to the corresponding number of RBs of the second RB according to the starting RB address.

Specifically, in the embodiment of the present invention, the user equipment may obtain the OFDM frame number corresponding to the uplink data by using the following formula: f=floor( ^{mod ul} ° ^(T - ^{Tl )} ) ( 5 )

T ₂ / 16 In Equation 5, f denotes an OFDM frame number corresponding to the uplink data, and an OFDM frame corresponding to the uplink data can be determined by the OFDM frame number. Floor is a function that can represent the largest integer taking no more than moduio ^ ' Ti ). _Modulo is a function that can represent (1^, 1)

The remainder of the value of T ₂ / 16 . T _start may represent the start time, 1 may represent a dynamic bandwidth allocation period of the network device, τ ₂ may represent an OFDM frame length, and the unit of 16 is nanosecond.

Specifically, in the embodiment of the present invention, the user equipment may obtain the first RB quantity by using the following formula:

In Equation 6, N is the first number of RBs. After the network device establishes the conversion relationship between the number of available RBs and the TQ in an OFDM frame, the user equipment can also learn the conversion relationship.

Specifically, in the embodiment of the present invention, the user equipment may obtain the starting RB address by using the following formula:

N*C = ceil ( B ( 7 )

i=l

In Equation 7, C represents the average capacity of all available RBs in an OFDM frame, and can represent the number of bit loadings of the i-th RB in the OFDM frame.

In general, the RE included in one RB can be divided into a data RE and a pilot RE. In general, each data RE included in one RB can use the same bit load number.

Specifically, in the embodiment of the present invention, the user equipment may determine the number of the second RB by using the following formula: floor (3⁄4i)* _Cb = ceil( 3⁄4 B 8 ) In Equation 8, T _length may represent the authorization The grant length in the message, c _b may represent the average number of bit loads of all available RBs in an OFDM frame, and may represent the starting RB address.

In the embodiment of the present invention, the number of the second RBs may be the number of RBs that need to be occupied by the uplink data. After obtaining the starting RB address and the second RB number, the user equipment may map the uplink data to the second RB number of RBs according to the starting RB address.

Further, in another embodiment of the present invention, after the user equipment maps the uplink data to corresponding RBs of the corresponding OFDM frame, that is, after mapping to the second RB number of RBs, The uplink data may be transmitted through the uplink logical channel according to the starting RB address and the second RB number.

Specifically, the physical layer may perform the process of performing FEC encoding, interleaving, and IFFT (Inverse Fast Fourier Transform) modulation on the uplink data, and carrying the uplink data to the corresponding RB, that is, carrying And to the number of RBs of the second RB with the starting RB address as a starting address.

After transmitting the initial burst identifier, the physical layer may transmit the uplink data by using the starting RB address and the second RB number of RBs through the uplink logical channel. After the uplink data transmission is completed, the user equipment may end the sending process by sending an end burst identifier.

In the embodiment of the present invention, since the conversion relationship is obtained, the physical layer of two-dimensional (including time domain information and frequency domain information) may be allocated according to the one-dimensional (only time domain message) authorization message. The resource solves the problem that the two-dimensional physical layer resources of the coaxial side cannot be allocated according to the one-dimensional GATE message in the prior art.

Embodiment 5

The embodiment of the invention describes a process in which the network device interacts with the user equipment. For example, the network device may be a CLT or an OLT located on the network side, and the user equipment may be a CNU located on the user side.

In the embodiment of the present invention, the network device may first allocate a corresponding modulation template to each user equipment according to the measured uplink signal to noise ratio corresponding to each user equipment, and each modulation template may correspond to at least one user equipment, and each The user equipments correspond to a modulation template.

For example, each user equipment may send an uplink sounding signal to the network device, and the network device may measure and determine an uplink signal signal to noise ratio of the corresponding user equipment according to the corresponding uplink sounding signal, so that the uplink signal signal to noise ratio may be The same or similar user equipments are allocated to a modulation template, and user equipments with different uplink signal to signal and noise ratios are not assigned to different modulation templates.

The network device may divide the physical channel between the network device and the multiple user equipments into corresponding uplink logical channels according to the number of modulation templates, and the number of allocated uplink logical channels may be the same as the number of modulation templates. , that is, each modulation template corresponds to an uplink logical channel, Each uplink logical channel may comprise an integer number of OFDM frames, each of which may be an OFDM frame employing a corresponding modulation template. In this way, an OFDM frame only corresponds to one modulation template, and there is no problem that one OFDM frame in the prior art may correspond to different modulation templates. Naturally, all CNUs can automatically map uplink data to RBs in OFDM. The transmission is carried out to ensure that the communication process is carried out normally.

In the embodiment of the present invention, when the uplink signal SNR of the multiple user equipments are the same or both, the multiple user equipments all correspond to the same uplink logical channel; When the uplink signal to noise ratios of the user equipments are the same or both are similar, the part of the user equipments all correspond to the same uplink logical channel; otherwise, the multiple user equipments are grouped according to channel conditions to correspond to different uplink logical channels, and each The modulation templates corresponding to the uplink logical channels are also different.

In the embodiment of the present invention, one uplink logical channel may correspond to at least one user equipment, and then each user equipment may transmit uplink data in each corresponding uplink logical channel.

Preferably, in the embodiment of the present invention, the network device may establish the conversion relationship according to an OFDM frame length in each different modulation template and a size of available RBs included in one OFDM frame. Specifically, in the embodiment of the present invention, the network device may establish the conversion relationship according to formula 1.

After the network device establishes the conversion relationship, the corresponding relationship may be stored, for example, may be stored in an MDIO register, or may be added in an eOAM message for the network device to acquire when needed.

In the embodiment of the present invention, for an OFDM frame, the size of each RB included in the OFDM frame may be configured by the network device, and multiple RBs may be included in one OFDM frame to carry burst marks. Characters, data, etc., and can eliminate the effects of time jitter. In the embodiment of the present invention, RBs of different sizes may be referred to as RBs of different kinds. The network device can Configure RB as needed.

The user equipment may send the bandwidth request message to the network device when it needs to transmit uplink data.

For example, the network device receives a bandwidth request message from multiple user equipments, and the network device may separately generate an authorization message corresponding to different user equipments according to bandwidth request messages sent by different user equipments. The authorization message may include a first bandwidth allocated for the corresponding user equipment, where the first bandwidth may be a start time characterized by a TQ corresponding to an integer number of RB sizes and an authorized length allocated for the corresponding user equipment. length.

For example, the network device may allocate the authorization length to the corresponding user equipment by using the following method: the network device may according to the TQ length of the data queue included in a bandwidth request message and the uplink logical channel corresponding to the corresponding user equipment. Coaxial average line rate, determine the user setting The amount of data of the upstream data that needs to be transmitted. After determining the data amount of the uplink data that the user equipment needs to transmit, the network device determines, according to the determined data volume of the uplink data, an average capacity of available RBs in an OFDM frame, and the conversion relationship, the user equipment is determined as the user equipment. The authorized length of the assignment. Specifically, the network device may determine, according to Equation 2, the authorized length allocated for one user equipment.

In the embodiment of the present invention, the network device may generate at least one authorization message, and the network device may separately send the at least one authorization message to the corresponding at least one user equipment.

Preferably, in the embodiment of the present invention, the network device may set a preset duration before the start time of each of the at least one authorization message before returning the at least one authorization message. Protection interval.

Preferably, in the embodiment of the present invention, the network device can obtain the guard interval of the preset duration by using Equation 4. Preferably, in the embodiment of the present invention, the guard interval of the preset duration may be a transmission duration of an integer number of RBs. Further, the guard interval of the preset duration may be a transmission duration of at least one RB.

In the embodiment of the present invention, the authorization message may be a data link layer that is sent to the user equipment, and after obtaining the authorization message, the data link layer may be based on the start in the authorization message. The uplink data is transmitted by the time and the authorized length.

Specifically, in the embodiment of the present invention, the data link layer needs to be in advance of the start time in the authorization message is a time when the uplink data reaches the physical layer, and therefore, the data link layer The sending needs to be performed before the start time to ensure that the time when the uplink data reaches the physical layer is the starting time.

The physical layer may automatically detect the uplink data, and after receiving the uplink data from the data link layer, perform at least error correction coding processing and interleaving processing on the uplink data, and process the processed data. Mapping the uplink data to a corresponding RB of a corresponding OFDM frame, that is, mapping And corresponding to the RB of the OFDM frame corresponding to the user equipment, where the OFDM frame structure of the physical layer needs to be aligned with the bandwidth allocation period of the network device.

Specifically, in the embodiment of the present invention, the physical layer of the user equipment mapping the uplink data to the corresponding resource block RB of the corresponding OFDM frame may include: the physical layer detecting the uplink data transmission The OFDM frame number corresponding to the uplink data is obtained, the physical layer converts the remaining OFDM intra-frame offset into a corresponding first RB quantity, and the physical layer obtains a starting RB according to the first RB quantity. And determining, by the physical layer, the second RB quantity that the uplink data needs to occupy according to the authorized length in the authorization message, to map the uplink data to the corresponding second RB according to the starting RB address. A number of RBs.

Specifically, in the embodiment of the present invention, the user equipment may obtain the starting RB address of the RB used for transmitting the uplink data by using Equation 7, and determine the second RB quantity by using Equation 8, that is, determine the uplink data to be transmitted. The total number of RBs that need to be occupied.

After obtaining the starting RB address and the second RB number, the user equipment may map the uplink data to the second RB number of RBs according to the starting RB address.

Specifically, the physical layer may perform the process of performing FEC encoding, interleaving, and IFFT (Inverse Fast Fourier Transform) modulation on the uplink data, and carrying the uplink data to the corresponding RB, that is, carrying the The starting RB address is on the number of RBs of the second RB of the starting address.

Embodiment 6

Referring to FIG. 7, an embodiment of the present invention provides a network device, where the network device can be applied to The EPOC system, the network device may include a first obtaining module 701 and a second assigning module 702. Preferably, the network device may further include a dividing module 703 and a third assigning module 704. The first obtaining module 701 can be configured to receive a bandwidth request message of the user equipment.

In this embodiment of the present invention, the user equipment may first send the bandwidth request message to the network device.

The second allocation module 702 may be configured to allocate a first bandwidth to the user equipment according to the bandwidth request message received by the first obtaining module 701, so that the user equipment passes the The uplink logical channel corresponding to the user equipment transmits the uplink data, where the uplink logical channel corresponding to the user equipment is an uplink logical channel in the uplink logical channel obtained by dividing the uplink physical channel.

The dividing module 703 can be configured to divide the uplink physical channel into one or more uplink logical channels according to the determined modulation template, where each uplink logical channel corresponds to one modulation template.

In the embodiment of the present invention, after the third allocation module 704 allocates each user equipment to a different modulation template, the dividing module 703 may firstly use the network device and the user equipment according to the determined modulation template. The uplink physical channel is divided into one or more uplink logical channels, where the number of uplink logical channels and the number of modulation templates may be the same, that is, the modulation template and the uplink logical channel may be in a corresponding relationship. An uplink logical channel may correspond to one OFDM frame.

The third allocation module 704 can be configured to allocate a corresponding modulation template to each user equipment according to the measured uplink signal to noise ratio corresponding to each user equipment, where each modulation template corresponds to at least one user equipment.

Preferably, the third allocation module 704 can allocate a corresponding modulation template to each user equipment according to an uplink signal to noise ratio corresponding to each user equipment.

For example, each user equipment may send an uplink sounding signal to the network device, where the The third allocation module 704 can determine the uplink signal to noise ratio of the corresponding user equipment according to the corresponding uplink sounding signal, so as to allocate a corresponding modulation template to each user equipment according to the uplink signal to noise ratio corresponding to each user equipment.

In the embodiment of the present invention, an uplink logical channel may correspond to at least one user equipment, and then each user equipment may transmit uplink data on the corresponding uplink logical channel.

In the embodiment of the present invention, the network device may be an optical line terminal (OLT) or a coaxial line terminal (CLT), and the user equipment may be a coaxial network unit (CNU).

Example 7

Referring to FIG. 8, an embodiment of the present invention provides a network device, where the network device can be applied to an EPOC system. The network device can include a second acquisition module 801 and an operation module 802.

Preferably, the network device may further include a configuration module 803, an establishing module 804, a first sending module 805, and a first assigning module 806.

The second obtaining module 801 may be configured to obtain a conversion relationship between a size of an available resource block RB and a time quantum TQ in an orthogonal frequency division multiplexing OFDM frame of each of the plurality of modulation templates, where the conversion is performed. The relationship is established according to the OFDM frame length and the size of available RBs included in one OFDM frame, one modulation template corresponding to a specific set of modulation parameters; and the network device by multiple uplink logical channels and divisions on one physical channel A plurality of user equipments are connected, one of the user equipments corresponds to one uplink logical channel, and one uplink logical channel corresponds to one modulation template.

The second obtaining module 801 may be configured to obtain an OFDM physical layer parameter by reading an MDIO register, where the OFDM physical layer parameter may include at least the conversion relationship, or the OFDM physical layer parameter may be obtained by using an eOAM message. At least the conversion relationship may be included in the OFDM physical layer parameters.

The operation module 802 may be configured to generate and send an authorization message to the at least one user equipment according to the conversion relationship and the bandwidth request message from the multiple user equipments, where the authorization message is included in the corresponding user equipment. The first bandwidth allocated on the uplink logical channel, where the first bandwidth is a start time and an authorized length represented by a TQ corresponding to an integer number of RB sizes.

The operating module 802 can also be configured to set before the start time of each authorization message A guard interval of a preset duration. In the embodiment of the present invention, the guard interval of the preset duration may be a transmission duration of at least one RB. Preferably, the guard interval of the preset duration may be a transmission duration of an integer number of RBs.

The operation module 802 may be configured to determine the authorization length that is allocated to the user equipment, where the TQ length of the data queue included in the bandwidth request message and the uplink logic corresponding to the user equipment may be specifically a coaxial average line rate of the channel, determining a data amount of uplink data that the user equipment needs to transmit; determining, according to the determined data quantity of the uplink data, an average capacity of available RBs in an OFDM frame, and the conversion relationship, The authorized length allocated by the user equipment.

The operation module 802 is specifically configured to determine, according to the formula 2, the authorization length allocated for the user equipment.

The operational module 802 can also be used to determine the average capacity of available RBs in an OFDM frame according to Equation 3.

The first allocation module 806 may be configured to allocate a corresponding modulation template to each of the multiple user equipments according to an uplink signal to noise ratio corresponding to the multiple user equipments, where each modulation template corresponds to an uplink logical channel. Each uplink logical channel contains an integer number of OFDM frames.

The configuration module 803 may be configured to configure a size of the RB to obtain RB configuration information, where the RB includes time domain information and frequency domain information, where the frequency domain information includes one or more subcarriers, The time domain information contains multiple OFDM symbols.

The establishing module 804 can be used to establish the conversion relationship, and specifically: The conversion relationship is established by the OFDM frame length under each modulation template and the size of available RBs included in one OFDM frame.

In the embodiment of the present invention, before the second obtaining module 801 obtains the conversion relationship, the establishing module 804 may first establish the conversion relationship.

Preferably, in the embodiment of the present invention, the establishing module 804 may establish the conversion relationship according to an OFDM frame length and a size of an available RB included in one OFDM frame.

Preferably, in the embodiment of the present invention, the establishing module 804 can establish the conversion relationship according to the formula 1.

The establishing module 804 may store the corresponding relationship after the corresponding relationship is established, for example, may be stored in an MDIO register, or may be added in an eOAM message, for the second acquiring module 801 when needed. Get it.

The first sending module 805 can be configured to send the RB configuration information to the user equipment by using a downlink physical link channel, so that the user equipment can learn the RB configuration information.

Preferably, the network device in the seventh embodiment and the network device in the sixth embodiment may be the same network device.

Example eight

Referring to FIG. 9, an embodiment of the present invention provides a user equipment, where the user equipment may be applied to an EPOC system, where the user equipment may include a second sending module 901 and a first transmitting module 902.

Preferably, the user equipment may further include a processing module 903.

The second sending module 901 can be configured to send a bandwidth request message to the network device.

The first transmission module 902 may be configured to transmit uplink data by using an uplink logical channel corresponding to the user equipment according to the received first bandwidth from the network device, where the uplink logical channel corresponding to the user equipment is divided. One uplink logical channel in the uplink logical channel obtained by the uplink physical channel.

The processing module 903 can be configured to place a TQ for each data queue in the bandwidth request message.

Example nine Referring to FIG. 10, an embodiment of the present invention provides a user equipment, where the user equipment may be applied to an EPOC system, where the user equipment may include a data link layer module 1001 and a physical layer module 1002.

Preferably, the user equipment may further include a second transmission module 1003.

The data link layer module 1001 can be configured to send uplink data according to a start time and an authorized length in an authorization message from the network device.

The physical layer module 1002 may be configured to: after automatically detecting the uplink data, perform at least error correction coding processing and interleaving processing on the uplink data, and map the processed uplink data to corresponding to the corresponding OFDM frame. On the RB, the OFDM frame structure of the physical layer module is aligned with the bandwidth allocation period of the network device. Obtaining an OFDM frame number corresponding to the uplink data, converting the remaining OFDM intra-frame offset into a corresponding first RB number, obtaining a starting RB address according to the first RB quantity, and according to the authorization message The authorization length determines a second number of RBs that need to be occupied by the uplink data, to map the uplink data to the corresponding number of RBs of the second RB according to the starting RB address.

The second transmission module 1003 may be configured to transmit the uplink data by using the uplink logical channel according to the starting RB address and the second RB quantity.

Preferably, the user equipment in Embodiment 9 and the user equipment in Embodiment 8 may be the same user equipment.

Example ten

Referring to FIG. 11, an embodiment of the present invention provides a network device, where the network device can be applied to an EPOC system. The network device can include a first acquisition interface 1101 and a first processor 1102.

Preferably, the network device may further include a second processor 1103.

The first obtaining interface 1101 can be configured to receive a bandwidth request message of the user equipment.

The first processor 1102 may be configured to allocate a first bandwidth to the user equipment according to the bandwidth request message received by the first acquiring interface 1101, so that the user equipment passes the Uplink logical channel corresponding to the user equipment transmits uplink data; The uplink logical channel corresponding to the user equipment is an uplink logical channel in the uplink logical channel obtained by dividing the uplink physical channel.

The second processor 1103 may be configured to allocate a corresponding modulation template to each user equipment according to the measured uplink signal to noise ratio corresponding to each user equipment, where each modulation template corresponds to at least one user equipment.

The second processor 1103 is further configured to divide the uplink physical channel into one or more uplink logical channels according to the determined modulation template, where each uplink logical channel corresponds to one modulation template.

In the embodiment of the present invention, the network device may be an optical line terminal or a coaxial line terminal, and the user equipment may be a coaxial network unit.

Embodiment 11

Referring to FIG. 12, an embodiment of the present invention provides a network device, where the network device can be applied to an EPOC system, and the network device can include a second obtaining interface 1201 and a third processor 1202.

The second acquisition interface 1201 can be used to obtain a conversion relationship between the size of the available resource block RB and the time quantum TQ in one OFDM frame.

The second obtaining interface 1201 may be specifically configured to obtain an OFDM physical layer parameter by reading the management data input and output MDIO register, where the OFDM physical layer parameter includes at least the conversion relationship; or, the eOAM message may be managed and maintained by using an extended operation. Obtaining the OFDM physical layer parameter, where the OFDM physical layer parameter includes at least the conversion relationship.

The third processor 1202 may be configured to generate M grant messages according to the M bandwidth request messages from the M user equipments and the conversion relationship obtained by the second obtaining module 1201, and send the M grant messages to the M users. The device sends the M authorization messages, where the authorization message includes a first bandwidth allocated for the corresponding user equipment, where the first bandwidth is a start time and an authorization length represented by TQ; wherein, when M is not less than 2 And setting a guard interval of a preset duration between start times in each of the M grant messages.

The third processor 1202 is further configured to configure a size of the RB to obtain RB configuration information, where the RB includes time domain information and frequency domain information, where the frequency domain information includes one or more subcarriers. The time domain information includes a plurality of OFDM symbols. The third processor 1202 is further configured to establish the conversion relationship, specifically: establishing the conversion relationship according to an OFDM frame length under each modulation template and an available RB number included in one OFDM frame, respectively.

The third processor 1202 can also be configured to establish the conversion relationship according to Equation 1.

The third processor 1202 may be configured to determine the authorization length that is allocated to the user equipment, specifically: according to a TQ length of a data queue included in the bandwidth request message, and the uplink corresponding to the user equipment. a coaxial average line rate of the logical channel, determining a data amount of uplink data that the user equipment needs to transmit; determining, according to the determined data volume of the uplink data, an average capacity of available RBs in an OFDM frame, and the conversion relationship The authorization length assigned to the user equipment. Authorization length.

The third processor 1202 may be specifically configured to determine an average capacity of available RBs in one OFDM frame according to Equation 3. interval.

In the embodiment of the present invention, the guard interval of the preset duration may be a transmission duration of at least one RB. Preferably, the guard interval of the preset duration may be a transmission duration of an integer number of RBs. I thought the same network was given to the device.

For example, the third processor 1202 in the eleventh embodiment and the first processor 1002 in the tenth embodiment may be the same processor.

Preferably, the network devices in the first embodiment to the fifth embodiment, the eleventh embodiment, the tenth embodiment, the sixth embodiment, and the seventh embodiment may be the same network device.

Example twelve

Referring to FIG. 13, an embodiment of the present invention provides a user equipment, where the user equipment may be applied to an EPOC system, where the user equipment may include a second sending interface 1301 and a fourth processor 1302. The second sending interface 1301 can be configured to send a bandwidth request message to the network device.

The fourth processor 1302 may be configured to transmit uplink data by using an uplink logical channel corresponding to the user equipment according to the received first bandwidth from the network device, where the uplink logical channel corresponding to the user equipment is divided. One uplink logical channel in the uplink logical channel obtained by the uplink physical channel.

The fourth processor 1302 can also be configured to place a TQ for each data queue in the bandwidth request message.

Example thirteen

Referring to FIG. 14, an embodiment of the present invention provides a user equipment, where the user equipment is applicable to an EPOC system, and the user equipment may include a fifth processor 1401 and a sixth processor 1402.

Preferably, the user equipment may further include a second sending interface 1403.

The fifth processor 1401 can be configured to send uplink data according to a start time and an authorized length in an authorization message from the network device.

The sixth processor 1402 may be configured to: after automatically detecting the uplink data, perform at least error correction coding processing and interleaving processing on the uplink data, and map the processed uplink data to corresponding to the corresponding OFDM frame. The RB frame structure of the physical layer module is aligned with the bandwidth allocation period of the network device.

The sixth processor 1402 is specifically configured to: detect the start time of the uplink data transmission, obtain an OFDM frame number corresponding to the uplink data, and convert the remaining OFDM intra-frame offset into a corresponding first Obtaining a starting RB address according to the first number of RBs; determining, according to an authorized length in the authorization message, a second number of RBs to be occupied by the uplink data, to perform the uplink according to the starting RB address The data is mapped to the corresponding number of RBs of the second RB.

The second sending interface 1403 may be configured to transmit the uplink data by using the uplink logical channel according to the starting RB address and the second RB quantity.

Preferably, the user equipment in the thirteenth embodiment and the user equipment in the twelfth embodiment may be the same user equipment.

Preferably, the first embodiment to the fifth embodiment, the thirteenth embodiment, the twelfth embodiment, and the eighth embodiment The user equipment in Embodiment 9 may be the same user equipment.

Embodiment 14

Referring to FIG. 15, an embodiment of the present invention provides an EPOC system, where the system may include a network device 1501 and a user equipment 1502.

The network device 1501 may be configured to obtain a conversion relationship between a size of an available resource block RB and a time quantum TQ in an orthogonal frequency division multiplexing OFDM frame of each of the plurality of modulation templates, where the conversion relationship is Established according to an OFDM frame length and a size of available RBs included in one OFDM frame, one modulation template corresponds to a specific set of modulation parameters; and the network device passes multiple uplink logical channels and multiple channels divided on one physical channel The user equipment is connected, where one user equipment corresponds to one uplink logical channel, and one uplink logical channel corresponds to one modulation template. According to the conversion relationship and the bandwidth request message from multiple user equipments, the user equipment is generated and sent to at least one user equipment. And an authorization message, where the authorization message includes a first bandwidth allocated by the corresponding user equipment on the corresponding uplink logical channel, where the first bandwidth is a start time and an authorization length represented by a TQ corresponding to an integer number of RB sizes.

The user equipment 1502 may be configured to send uplink data according to a start time and an authorized length in an authorization message from the network device; after automatically detecting the uplink data, perform at least error correction coding processing on the uplink data. The interleaving process is performed, and the processed uplink data is mapped to a corresponding RB of the corresponding OFDM frame. The OFDM frame structure of the physical layer module is aligned with the bandwidth allocation period of the network device.

Preferably, the network device 1501 in the embodiment of the present invention and the network device in the first embodiment to the fifth embodiment, the eleventh embodiment, the tenth embodiment, the sixth embodiment, and the seventh embodiment may be the same network device. .

Preferably, the user equipment in the embodiment of the present invention and the user equipment in the first embodiment to the fifth embodiment, the thirteenth embodiment, the twelfth embodiment, the eighth embodiment, and the ninth embodiment may be the same user. device.

The bandwidth allocation method in the embodiment of the present invention may be applied to an Ethernet passive optical network protocol coaxial cable physical layer EPOC system, and the method may include the following steps: And a conversion relationship between the size of the available resource block RB and the time quantum TQ in the orthogonal frequency division multiplexing OFDM frame of each modulation template in the modulation template; wherein the conversion relationship is according to an OFDM frame length and an available included in one OFDM frame The size of the RB is established, and a modulation template corresponds to a specific set of modulation parameters. The network device is connected to multiple user equipments by using multiple uplink logical channels divided on one physical channel, where one user equipment corresponds to one uplink logic. Channel, an uplink logical channel corresponding to a modulation template; the network device generates and sends at least one authorization message to at least one user equipment according to the conversion relationship and a bandwidth request message from multiple user equipments, where the authorization message is sent The first bandwidth allocated for the corresponding user equipment on the corresponding uplink logical channel, where the first bandwidth is a start time and an authorized length represented by a TQ corresponding to an integer number of RB sizes.

In the embodiment of the present invention, the network device may obtain a conversion relationship between a size of an available RB and a TQ in each modulation template, where the network device may generate according to the conversion relationship and a bandwidth request message from multiple user equipments. And transmitting, to the at least one user equipment, an authorization message, according to the conversion relationship, the one-dimensional time domain information can be converted into two-dimensional time domain information and frequency domain information, so that the network device is equivalent to The bandwidth allocation of the user equipment is indicated by the two-dimensional time domain information and the frequency domain information, which solves the technical problem that cannot be solved in the prior art.

It can be clearly understood by those skilled in the art that for the convenience and cleanness of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. Alternatively, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interface, device or unit. The coupling or communication connection can be in electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software function unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

The above embodiments are only used to describe the technical solutions of the present application in detail, but the description of the above embodiments is only for helping to understand the method and the core idea of the present invention, and should not be construed as limiting the present invention. Those skilled in the art will be able to devise variations or alternatives that are conceivable within the scope of the present invention.

Claims

Rights request

1. A bandwidth allocation method applied to the Ethernet Passive Optical Network Protocol Coaxial Cable Physical Layer EPOC system, characterized in that the method includes the following steps:

The network device obtains the conversion relationship between the size of the available resource block RB and the time quantum TQ in the orthogonal frequency division multiplexing OFDM frame of each modulation template in the plurality of modulation templates; wherein, the conversion relationship is based on the OFDM frame length and a Established by the size of available RBs included in the OFDM frame, one modulation template corresponds to a specific set of modulation parameters; the network device is connected to multiple user equipments through multiple uplink logical channels divided on one physical channel, one of which The user equipment corresponds to an uplink logical channel, and an uplink logical channel corresponds to a modulation template;

The network device generates and sends an authorization message to at least one of the user equipments respectively according to the conversion relationship and the bandwidth request messages from multiple user equipments. The authorization messages include the corresponding uplink logical channel for the corresponding user equipment. The first bandwidth allocated is the starting time and grant length represented by the TQ corresponding to an integer number of RB sizes.

2. The method according to claim 1, characterized in that, before the network device respectively obtains the conversion relationship between the size of the available resource block RB and the time quantum TQ in an OFDM frame in each modulation template, it also includes: The network device allocates corresponding modulation templates to the plurality of user equipments according to the corresponding uplink signal-to-noise ratios of the plurality of user equipments. Each modulation template corresponds to an uplink logical channel, and each uplink logical channel contains an integer. OFDM frames.

3. The method of claim 1 or 2, wherein when the network device generates the at least one authorization message, it further includes: the network device before the starting time of each authorization message. Set a guard interval of a preset length.

4. The method of claim 3, wherein the network device obtains the guard interval of the preset duration through the following formula:

G = ceil((b + j + S ₃ ) /S ₄ ) * N _TQ

Where, G is the guard interval of the preset duration, b is the number of resource units RE occupied by the burst identifier, j is the number of guard resource units reserved for eliminating time jitter of the data link layer, and S3 is The number of protection REs reserved between the two authorization messages, s4 is the number of REs in one type of RB, and N _TQ is the number of TQs corresponding to one type of available RB.

5. The method according to any one of claims 1 to 4, characterized in that when the uplink signal-to-noise ratios of the multiple user equipments are all the same or similar, the multiple user equipments all correspond to The same uplink logical channel; When the uplink signal-to-noise ratios of some of the multiple user equipments are the same or similar, the partial user equipments all correspond to the same uplink logical channel; otherwise, the multiple user equipments Each user equipment is grouped according to channel conditions and corresponds to different uplink logical channels, and the modulation template corresponding to each uplink logical channel is also different.

6. The method according to any one of claims 1 to 5, characterized in that, before the network device obtains the conversion relationship between the size of available RBs in an OFDM frame and the time quantum TQ, it further includes: the network device configuration The size of the RB is used to obtain RB configuration information; wherein, the RB includes time domain information and frequency domain information, the frequency domain information includes one or more subcarriers, and the time domain information includes multiple OFDM symbols. .

7. The method of claim 6, wherein after the network device configures the size of the RB, it further includes: the network device sends the RB configuration information to the network device through a downlink physical link channel. User equipment, so that the user equipment can learn the RB configuration information.

8. The method according to any one of claims 1 to 7, characterized in that the network device establishes the conversion relationship according to the following formula:

Among them, N _TQ is the number of TQs corresponding to one type of RB, d is the length of one OFDM frame, n is the number of available subcarriers included in one OFDM symbol, nl is the number of subcarriers included in one RB, and m is the number of subcarriers included in one RB. The number of OFDM symbols, al is 16 nanoseconds, and the ceil function indicates that it is not less than ^d * ⁿ

The smallest integer that takes the value.

9. The method according to any one of claims 1 to 8, characterized in that the network device determines the authorization length allocated to the user equipment according to the following steps: The network device determines the amount of uplink data that the user equipment needs to transmit based on the TQ length of the data queue included in the bandwidth request message and the coaxial average line rate of the uplink logical channel corresponding to the user equipment. ;

The network device determines the grant length allocated to the user equipment based on the determined data volume of the uplink data, the average capacity of available RBs in an OFDM frame, and the conversion relationship.

10. The method of claim 9, wherein the network device determines the authorization length allocated to the user equipment according to the following formula:

L _{1 =} ceil (( L ₂十S/^NTQ

Wherein, L1 is the authorization length allocated by the network device to the user equipment, L2 is the authorization byte length allocated by the network device to the user equipment, s2 is the previous authorization byte length obtained according to the authorization byte length. Error correction FEC overhead, cl is the average capacity of available RBs in an OFDM frame, N _TQ is the number of TQs corresponding to one type of RB.

11. The method of claim 10, wherein the network device determines the average capacity of available RBs in an OFDM frame according to the following formula:

cl=ceil ( tl* ( N _TQ *16ns ) /8 );

Where, cl is the average capacity of available RBs in an OFDM frame, tl is the average coaxial line rate of the uplink logical channel, and N _TQ is the number of TQs corresponding to an available RB.

12. A data mapping method applied to the EPOC system, characterized in that the method includes the following steps:

The data link layer in the user equipment sends uplink data based on the start time and authorization length in the authorization message from the network device;

After the physical layer of the user equipment automatically detects the uplink data, it performs at least error correction coding and interleaving processing on the uplink data, and maps the processed uplink data to the corresponding RB of the corresponding OFDM frame. ; Wherein, the OFDM frame structure of the physical layer is aligned with the bandwidth allocation period of the network device.

13. The method of claim 12, wherein the physical layer of the user equipment automatically After dynamically detecting the uplink data, the uplink data is subjected to at least error correction coding processing and interleaving processing, and the processed uplink data is mapped to the corresponding RB of the corresponding OFDM frame, including: the physical layer Detect the starting time of the uplink data transmission, and obtain the OFDM frame sequence number corresponding to the uplink data;

The physical layer converts the remaining OFDM intra-frame offset into the corresponding first RB number; the physical layer obtains a starting RB address according to the first RB number;

The physical layer determines the number of second RBs that the uplink data needs to occupy based on the authorization length in the authorization message, so as to map the uplink data to the corresponding number of second RBs according to the starting RB address. RB on.

14. A network device applied to an EPOC system, characterized in that the network device includes:

The second acquisition module is used to respectively obtain the conversion relationship between the size of the available resource block RB and the time quantum TQ in the orthogonal frequency division multiplexing OFDM frame of each modulation template in the plurality of modulation templates; wherein, the conversion relationship is according to Established by the OFDM frame length and the size of available RBs included in an OFDM frame, a modulation template corresponds to a specific set of modulation parameters; the network device divides multiple uplink logical channels and multiple users on a physical channel Equipment connection, one user equipment corresponds to an uplink logical channel, and one uplink logical channel corresponds to a modulation template;

An operation module configured to generate and deliver authorization messages to at least one of the user equipments according to the conversion relationship and bandwidth request messages from multiple user equipments. The authorization messages include corresponding uplink logic for the corresponding user equipments. The first bandwidth allocated on the channel, the first bandwidth is the starting time and grant length represented by the TQ corresponding to an integer RB size.

15. The network device according to claim 14, characterized in that, the network device further includes a first allocation module, configured to: according to the signal-to-noise ratio of the uplink signals respectively corresponding to the plurality of user equipments, The user equipment is allocated a corresponding modulation template respectively, each modulation template corresponds to an uplink logical channel, and each uplink logical channel contains an integer number of OFDM frames.

16. The network device according to claim 14 or 15, wherein the operation module is further configured to: set a guard interval of a preset length before the starting time of each authorization message.

17. The network device according to claim 16, wherein the operation module is further configured to obtain the guard interval of the preset duration according to the following formula:

G = ceil((b + j + S ₃ ) /S ₄ )* N _TQ

Among them, G is the guard interval of the preset duration, b is the number of resource units RE occupied by the burst identifier, j is the number of guard resource units reserved for eliminating time jitter at the data link layer, and S3 is two The number of protection REs reserved between the authorization messages, s4 is the number of REs in an RB, and N _TQ is the number of TQs corresponding to an available RB.

18. The network device according to any one of claims 14 to 17, characterized in that when the signal-to-noise ratios of the uplink signals of the plurality of user equipments are all the same or similar, the plurality of user equipments have correspond to the same uplink logical channel; when the uplink signal-to-noise ratios of some of the user equipments among the plurality of user equipments are the same or similar, the part of the user equipments all correspond to the same uplink logical channel; otherwise, the Multiple user equipments are grouped according to channel conditions and correspond to different uplink logical channels, and the modulation template corresponding to each uplink logical channel is also different.

19. The network device according to any one of claims 14 to 17, characterized in that the network device further includes a configuration module for configuring the size of the RB and obtaining RB configuration information; wherein, the RB It includes time domain information and frequency domain information, the frequency domain information includes one or more subcarriers, and the time domain information includes multiple OFDM symbols.

20. The network device according to claim 19, characterized in that, the network device further includes a first sending module, configured to: send the RB configuration information to the user equipment through a downlink physical link channel, so that The user equipment can learn the RB configuration information.

21. The network device according to any one of claims 14 to 20, characterized in that the network device further includes an establishment module for establishing the conversion relationship according to the following formula:

Among them, N _TQ is the number of TQs corresponding to one RB, d is the length of an OFDM frame, n is the number of available subcarriers included in an OFDM symbol, nl is the number of subcarriers included in an RB, and m is The number of OFDM symbols contained in one RB, al is 16 nanoseconds, and the ceil function indicates that it is not less than ^d * ⁿ

The smallest integer that takes the value.

22. The network device according to any one of claims 14 to 21, characterized in that the second acquisition module is specifically used to: obtain OFDM physical layer parameters by reading the management data input and output MDIO register, the OFDM The physical layer parameters at least include the conversion relationship; or, the OFDM physical layer parameters are obtained through an extended operation management and maintenance eOAM message, and the OFDM physical layer parameters at least include the conversion relationship.

23. The network device according to any one of claims 14 to 22, characterized in that the operation module is used to determine the authorization length allocated to the user equipment, specifically: according to the bandwidth request message The TQ length of the data queue included in and the coaxial average line rate of the uplink logical channel corresponding to the user equipment, determine the data amount of the uplink data that the user equipment needs to transmit; according to the determined data of the uplink data The grant length allocated to the user equipment is determined based on the amount, the average capacity of available RBs in one OFDM frame and the conversion relationship.

24. The network device according to claim 23, wherein the operation module is specifically configured to determine the authorization length allocated to the user equipment according to the following formula:

L _{1 =} ceil (( L ₂十S/^NTQ

25. The network device according to claim 24, wherein the operation module is further configured to determine the average capacity of available RBs in an OFDM frame according to the following formula:

cl=ceil ( tl* ( N _TQ *16ns ) /8 );

26. A user equipment, applied to EPOC system, characterized in that, the user equipment includes Includes:

Data link layer module, used to send uplink data based on the starting time and authorization length in the authorization message from the network device;

The physical layer module is configured to automatically detect the uplink data, perform at least error correction coding and interleaving processing on the uplink data, and map the processed uplink data to the corresponding RB of the corresponding OFDM frame; Wherein, the OFDM frame structure of the physical layer module is aligned with the bandwidth allocation period of the network device.

27. The user equipment according to claim 26, wherein the physical layer module is specifically configured to: detect the starting time of sending the uplink data, and obtain the OFDM frame sequence number corresponding to the uplink data; Convert the remaining OFDM intra-frame offset into the corresponding first RB number; obtain the starting RB address according to the first RB number; determine the second RB number that the uplink data needs to occupy according to the grant length in the grant message , to map the uplink data to the corresponding number of RBs of the second RB according to the starting RB address.

28. An EPOC system, characterized by including:

Network equipment, configured to obtain a conversion relationship between the size of the available resource block RB and the time quantum TQ in the orthogonal frequency division multiplexing OFDM frame of each modulation template in the plurality of modulation templates; wherein, the conversion relationship is based on the OFDM frame Established as long as the size of the available RBs included in an OFDM frame, a modulation template corresponds to a specific set of modulation parameters; the network device is connected to multiple user equipments through multiple uplink logical channels divided on one physical channel , wherein one user equipment corresponds to one uplink logical channel, and one uplink logical channel corresponds to one modulation template; according to the conversion relationship and the bandwidth request messages from multiple user equipments, generate and issue authorization messages to at least one of the user equipments respectively, The authorization message includes the first bandwidth allocated to the corresponding user equipment on the corresponding uplink logical channel, where the first bandwidth is the starting time and authorization length represented by the TQ corresponding to an integer RB size;

The user equipment is configured to send uplink data according to the starting time and authorization length in the authorization message from the network device; after automatically detecting the uplink data, at least perform error correction coding and interleaving on the uplink data Process, and map the processed uplink data to the corresponding on the corresponding RB of the OFDM frame; wherein, the OFDM frame structure of the physical layer module is aligned with the bandwidth allocation period of the network device.