WO2025200431A1 - 通信方法、设备及存储介质 - Google Patents
通信方法、设备及存储介质Info
- Publication number
- WO2025200431A1 WO2025200431A1 PCT/CN2024/128529 CN2024128529W WO2025200431A1 WO 2025200431 A1 WO2025200431 A1 WO 2025200431A1 CN 2024128529 W CN2024128529 W CN 2024128529W WO 2025200431 A1 WO2025200431 A1 WO 2025200431A1
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- WO
- WIPO (PCT)
- Prior art keywords
- optical
- network terminal
- terminal device
- optical network
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/293—Signal power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0086—Network resource allocation, dimensioning or optimisation
Definitions
- the present application relates to the field of communication technology, and in particular to communication methods, devices and storage media.
- the embodiments of the present application provide a communication method, device, and storage medium, which effectively solve the compatibility problem between two sets of different access device indicators in the related art.
- the optical central office device sends access capabilities to the optical network terminal device; the optical network terminal device determines transmission parameters according to the access capabilities.
- the access capability is sent to the optical network terminal device, so that the optical network terminal device determines the transmission parameters according to the access capability.
- An embodiment of the present application provides a communication method applied to an optical network terminal device, which includes:
- An embodiment of the present application provides a communication device, comprising: a memory, and one or more processors; the memory is configured to store one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the communication method described in any of the above embodiments.
- the present invention provides a storage medium storing a computer program.
- the computer program is executed by a processor, the communication method described in any of the above embodiments is implemented.
- FIG2 is a schematic diagram of a solution to the compatibility problem of two different PON transceiver specifications at the same ODN level provided by the related art
- FIG3 is a flow chart of a communication method provided in an embodiment of the present application.
- FIG5 is a flow chart of another communication method provided in an embodiment of the present application.
- FIG6 is a schematic diagram of the configuration of an OC body of a downlink physical synchronization block PSBd provided in an embodiment of the present application;
- FIG7 is a structural block diagram of a communication device provided in an embodiment of the present application.
- FIG8 is a structural block diagram of another communication device provided in an embodiment of the present application.
- FIG10 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
- OLT optical line terminal
- ONU optical network unit
- ODN optical distribution network
- the data sent from OLT to ONU is called downstream transmission, while the data sent from ONU to OLT is called upstream transmission.
- the Power Levelling function is standardized in related technologies.
- the OLT transmits the ONU transmit power control signal to the ONU by sending Change_Power_Level and Upstream_Overhead messages.
- the ONU feedbacks the current ONU adjusted transmit optical power through Serial_Number_ONU.
- an ONU with a high transmit optical power standard after attenuating it by 3dB through power leveling, cannot guarantee that it meets the OLT receiver sensitivity requirements of the high-power transceiver specification.
- directly connecting an ONU with a high transmit optical power standard to a PON network with a low-power transceiver specification may cause OLT receiver overload.
- Power leveling can partially resolve compatibility issues. This means that after a high-power ONU undergoes 3dB attenuation, a portion of the ONU's transmitted optical power can be received by an OLT with a lower receive power specification. This depends on the ONU's specific location in the ODN and the splitting ratio. For example, using G.984.3, the power leveling mechanism provides three ONU transmit optical powers: nominal optical power, nominal optical power -3dB, and nominal optical power -6dB. This, to a certain extent, addresses the issue of high-transmit power ONUs overloading the receivers of low-receive power OLTs. The original purpose of the power leveling feature was not to resolve these compatibility issues, but to enable ONU energy conservation. Using power leveling to address these compatibility issues still requires revisions and does not fully resolve the issue.
- Power Levelling includes two ONU transmit optical power adjustment methods:
- the first method Power adjustment and activation by ONU
- the power adjustment activation in this type of mode is reflected in the ONU online activation process.
- the ONU online activation process is as follows:
- the OLT uses the bandwidth mapping table to send a direct Serial Number request to the newly connected ONU and accurately time its response.
- the ONU sends a feedback message to the OLT, which calculates the equivalent delay (EqD) for the ONU and notifies it via the Ranging_Time message.
- the ONU adjusts the start time of its GTC frame based on the equivalent delay (EqD), completes the online plan, and enters normal operation.
- the second method The OLT performs power adjustment and activation.
- the optical terminal device in the embodiment of the present application may include: the OLT in the PON system, or the master device (MFU) in the fiber to the room (FTTR); correspondingly, the optical network terminal device may include: the ONU in the PON system, or the slave device (SFU) in the FTTR.
- MFU master device
- SFU slave device
- Figure 3 is a flow chart of a communication method provided by an embodiment of the present application. This embodiment is applicable to situations where multiple access device specifications are compatible. This embodiment can be executed by an optical central office device and an optical network terminal device. As shown in Figure 3, this embodiment includes: S310-S320.
- the optical central office device sends access capabilities to the optical network terminal device.
- the access capability sent by the optical central office device refers to the access capability that can match the optical central office device.
- the optical central office device before the optical central office device assigns the optical network terminal device identifier to the optical network terminal device, the optical central office device can send the access capability that matches itself to the optical network terminal device.
- the optical network terminal device dynamically adjusts its own transmission parameters according to the access capability matched by the optical central office device, so that its own transmission parameters can match the access capability of the optical central office device. Matching can enable the optical network terminal equipment to successfully communicate with the optical central office equipment.
- the transmission parameters include at least one of the following: transmission optical power; forward error correction coding.
- the access capability includes at least one of the following: receiving capability of the optical central office device; transmitting capability of the optical network terminal device; optical distribution network (ODN) level; and forward error correction coding.
- ODN optical distribution network
- the optical central office device can explicitly send access capabilities to the optical network terminal device, that is, the optical central office device directly sends the receiving capabilities of the optical central office device and/or the transmitting capabilities of the optical network terminal device supported by the optical central office device to the optical network terminal device.
- the optical central office device can also implicitly send access capabilities to the optical network terminal device.
- the optical central office device sends the ODN level to the optical network terminal device.
- the optical network terminal device can compare it with the physical layer specification and obtain the receiving capabilities of the optical central office device at the current ODN level and the transmitting capabilities of the optical network terminal device.
- the optical central office device can also send forward error correction coding to the optical network terminal device.
- the optical network terminal device can encode according to the default FEC codeword or other newly added FEC codeword so that its own transmitted optical power can meet the receiving capabilities matched by the optical central office device, or the transmitting capabilities of the optical network terminal device matched by the optical central office device.
- the transmitting capabilities of the optical network terminal device refer to the transmitting capabilities that match the receiver specifications of the optical central office device.
- the receiving capability of the optical central office device includes receiver sensitivity; the transmitting capability of the optical network terminal device includes average transmitted optical power; the optical distribution network (ODN) level includes at least one of the following: ODN levels corresponding to different optical link loss ranges, ODN levels corresponding to different receiver sensitivities within the same optical link loss range, and ODN levels corresponding to different average transmitted optical powers within the same optical link loss range; and the forward error correction (FEC) code includes at least two different FEC codes.
- the FEC codeword corresponding to each FEC code has a different coding gain.
- the access capability includes any one of the following: a value indicating the access capability, an identifier indicating the access capability.
- the optical central office device may send a value representing the access capability to the optical network terminal device, or may send an identifier representing the access capability to the optical network terminal device.
- the transmission parameter includes: the transmission optical power of the optical network terminal device; the optical network terminal device determines the transmission parameter according to the access capability, including one of the following:
- the ONT device's transmission specification exceeds the access capability, the ONT device reduces its transmitted optical power to meet the access capability. If the ONT device's transmission specification falls below the access capability, the ONT device increases its transmitted optical power to meet the access capability. If the ONT device's transmission specification falls below the access capability, the ONT device transmits optical power according to its own transmission specification.
- the ONT device's transmission specification can be understood as the transmission specification configured at the factory, and the access capability can be understood as the access capability that matches the optical central office device.
- the transmission specification of the optical network terminal device includes: average transmission optical power; the average transmission optical power includes at least one of the following: minimum average transmission power, minimum OMA-TDEC transmission power, and minimum OMA transmission power.
- the transmission specification of the optical network terminal device being higher than the access capability includes at least one of the following:
- the minimum average transmit power of the optical network terminal device is higher than the minimum average transmit power sent by the optical central office device; the minimum OMA-TDEC transmit power of the optical network terminal device is higher than the minimum OMA-TDEC transmit power sent by the optical central office device; the minimum OMA transmit power of the optical network terminal device is higher than the minimum OMA transmit power sent by the optical central office device; the minimum average transmit power of the optical network terminal device is higher than the sensitivity at a given bit error rate (BER) sent by the optical central office device and the sum of the optical link budget between the optical network terminal device and the optical central office device; the minimum OMA transmit power of the optical network terminal device is higher than the OMA sensitivity at a given bit error rate (BER) sent by the optical central office device and the sum of the optical link budget between the optical network terminal device and the optical central office device.
- BER bit error rate
- the transmission specification of the optical network terminal device being lower than the access capability includes at least one of the following:
- the optical link budget between the optical network terminal device and the optical central office device includes at least: an absolute value of a maximum optical link loss OPL corresponding to an optical distribution network ODN level.
- the transmission parameters include: the transmission optical power of the optical network terminal device; if the transmission specification of the optical network terminal device is higher than the receiving capability of the optical central office device, and the optical network terminal device can only transmit optical power within its own transmission specification, the optical network terminal device determines the transmission parameters according to the access capability, including:
- the optical network terminal device automatically performs an attenuation operation of the first preset power.
- the first preset power may be a preconfigured transmit optical power value. If the transmit specification of the optical network terminal device exceeds the receive capability of the optical central office device, the optical network terminal device may automatically attenuate its transmit optical power by one or more of the first preset powers. For example, if the first preset power is 3 dB, the optical network terminal device may attenuate its transmit optical power by 1 to 7 integer multiples of 3 dB.
- the transmission parameters include: forward error correction coding of the optical network terminal device; if the transmission specification of the optical network terminal device is lower than the receiving capability of the optical central office device, the optical network terminal device determines the transmission parameters according to the access capability, including one of the following:
- the optical network terminal device switches from the default FEC codeword to the first FEC codeword, wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword; the optical network terminal device uses the first high-gain FEC codeword, wherein the coding gain of the first high-gain FEC codeword is greater than the coding gain of other FEC codewords.
- the optical network terminal device can switch from the currently used default FEC codeword to a first FEC codeword and use the first FEC codeword for forward error correction. If, after encoding using the first FEC codeword, the optical network terminal device still cannot reach the matching access capability of the optical central office device, it can continue to use a second FEC codeword with a slightly higher coding gain than the first FEC codeword and perform encoding again until the forward error correction coding of the optical network terminal device matches the forward error correction coding of the optical central office device.
- the optical network terminal device can directly use the first high-gain FEC codeword for forward error correction to meet the forward error correction coding requirements of the optical central office device.
- the transmission parameters include: the transmission optical power and forward error correction code of the optical network terminal device; if the transmission specification of the optical network terminal device is higher than the receiving capability of the optical central office device, and the optical network terminal device can only transmit optical power within its own transmission specification, the optical network terminal device determines the transmission parameters according to the access capability, including:
- the optical network terminal device may first attenuate the optical signal to a first preset power. If the power of the optical signal transmitted by the optical network terminal device to the optical central office device still cannot meet the receiving capability of the optical central office device, the optical network terminal device may switch from the default FEC codeword to the first FEC codeword to perform forward error correction on the optical signal transmitted by the optical network terminal device.
- the optical signal transmitted by the optical network terminal device may be further forward-error corrected using a second FEC codeword, a third FEC codeword, or an Nth FEC codeword until the receiving capability of the optical central office device is met.
- the coding gain of the second FEC codeword is greater than the coding gain of the first FEC codeword; the coding gain of the third FEC codeword is greater than the coding gain of the second FEC codeword; and the coding gain of the Nth FEC codeword is greater than the coding gain of the N-1th FEC codeword.
- the communication method further includes: the optical central office device receiving, from the optical network terminal device, a transmit power adjustment capability, a transmit power adjustment status, and transmit indication information.
- the transmit power adjustment capability indicates whether the optical network terminal device supports transmit optical power adjustment
- the transmit power adjustment status indicates whether the transmit optical power of the optical network terminal has been adjusted
- the transmit indication information indicates the transmit specifications of the optical network terminal device.
- the transmit power adjustment capability and transmit power adjustment status are carried in a serial number message.
- the serial number message may be a Serial Number ONU message.
- the communication method further includes: the optical central office device receiving a response message of the serial number authorization sent by the optical network terminal device within a pre-configured quiet window according to the transmission parameters.
- FIG4 is a flow chart of another communication method provided by an embodiment of the present application. This embodiment is applied to situations where multiple different access device indicators are compatible. This embodiment can be executed by an optical central office device. As shown in FIG4 , this embodiment includes: S410.
- S410 Send access capabilities to the optical network terminal device, so that the optical network terminal device determines transmission parameters according to the access capabilities.
- the transmission parameters include at least one of the following: transmission optical power; forward error correction coding.
- the access capability includes at least one of the following: receiving capability of the optical terminal device; Transmission capability of network terminal equipment; optical distribution network (ODN) level; forward error correction coding.
- ODN optical distribution network
- the receiver sensitivity includes at least one of the following: sensitivity at a given bit error rate (BER), and OMA sensitivity at a given bit error rate (BER);
- the average transmitted optical power includes at least one of the following: minimum average transmitted power, minimum OMA-TDEC transmitted power, and minimum OMA transmitted power.
- the access capability is sent in at least one of the following ways: broadcasting the access capability; multicasting the access capability; and unicasting the access capability.
- the access capability includes any one of the following: a value indicating the access capability, an identifier indicating the access capability.
- the transmission parameter includes: the transmission optical power of the optical network terminal device; the optical network terminal device determines the transmission parameter according to the access capability, including one of the following:
- the optical network terminal device If the transmission specification of the optical network terminal device is higher than the access capability, the optical network terminal device reduces its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device increases its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device transmits optical power according to its own transmission specification.
- the transmission parameters include: the transmission optical power of the optical network terminal device; if the transmission specification of the optical network terminal device is higher than the receiving capability of the optical central office device, and the optical network terminal device can only transmit optical power within its own transmission specification, the optical network terminal device determines the transmission parameters according to the access capability, including:
- the transmission parameters include: forward error correction coding of the optical network terminal device; if the transmission specification of the optical network terminal device is lower than the receiving capability of the optical central office device, the optical network terminal device determines the transmission parameters according to the access capability, including one of the following:
- the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword; the optical network terminal device uses the first high-gain FEC codeword, wherein the coding gain of the first high-gain FEC codeword is greater than the coding gain of other FEC codewords.
- the optical network terminal device automatically performs an attenuation operation of a first preset power; if the power of the optical signal sent by the optical network terminal device to the optical central office device does not meet the receiving capability of the optical central office device, the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword.
- the communication method applied to the optical central office device further includes: receiving the transmission power adjustment capability, transmission power adjustment status and transmission instruction information reported by the optical network terminal device.
- the communication method applied to the optical central office device further includes: receiving a response message of a sequence number authorization sent by the optical network terminal device within a pre-configured quiet window according to the transmission parameters.
- FIG5 is a flowchart of another communication method provided by an embodiment of the present application. This embodiment is applied to situations where multiple different access device indicators are compatible. This embodiment can be executed by an optical network terminal device. As shown in FIG5, this embodiment includes: S510-S520.
- S510 Receive access capability sent by the optical central office device.
- the transmission parameters include at least one of the following: transmission optical power; forward error correction coding.
- the access capability includes at least one of the following: receiving capability of the optical central office device; transmitting capability of the optical network terminal device; optical distribution network (ODN) level; and forward error correction coding.
- ODN optical distribution network
- the receiving capability of the optical terminal device includes: receiver sensitivity; the transmitting capability of the optical network terminal device includes: average transmitted optical power; the optical distribution network ODN level includes at least one of the following: ODN levels corresponding to different optical link loss ranges, ODN levels corresponding to different receiver sensitivities in the same optical link loss range, and ODN levels corresponding to different average transmitted optical powers in the same optical link loss range; and the forward error correction coding includes: at least two different forward error correction codes.
- the access capability is sent in at least one of the following ways: broadcasting the access capability. capability; multicast sending access capability; unicast sending access capability.
- the access capability includes any one of the following: a value indicating the access capability, an identifier indicating the access capability.
- the transmission parameters include: the transmission optical power of the optical network terminal device; the transmission parameters are determined according to the access capability, including one of the following:
- the optical network terminal device If the transmission specification of the optical network terminal device is higher than the access capability, the optical network terminal device reduces its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device increases its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device transmits optical power according to its own transmission specification.
- the transmission parameters include: the transmission optical power of the optical network terminal device; if the transmission specification of the optical network terminal device is higher than the receiving capability of the optical central office device, and the optical network terminal device can only transmit optical power within its own transmission specification, the transmission parameters are determined according to the access capability, including:
- the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword; the optical network terminal device uses the first high-gain FEC codeword, wherein the coding gain of the first high-gain FEC codeword is greater than the coding gain of other FEC codewords.
- the transmission parameters include: the transmission optical power and forward error correction code of the optical network terminal device; if the transmission specification of the optical network terminal device is higher than the receiving capability of the optical central office device, and the optical network terminal device can only transmit optical power within its own transmission specification, the transmission parameters are determined according to the access capability, including:
- the optical network terminal device automatically performs an attenuation operation of a first preset power; if the power of the optical signal sent by the optical network terminal device to the optical central office device does not meet the receiving capability of the optical central office device, the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword.
- the notification method of the first FEC codeword includes one of the following: specifying the burst configuration information of the new index number for the optical network terminal device in the bandwidth allocation mapping table; specifying the optical network terminal device to use the first FEC codeword with a higher coding gain than the default FEC codeword through a first management message.
- the communication method applied to the optical network terminal device further includes: reporting the transmit power adjustment capability, transmit power adjustment status and transmit instruction information to the optical central office device.
- Figure 6 is a configuration diagram of the OC body of a PSBd downlink physical synchronization block provided in an embodiment of the present application. As shown in Figure 6, a 3-bit ODN level is defined.
- the operation control structure consists of a 51-bit operation control body (OC body) and a 13-bit HEC field, as shown in Figure 6.
- the HEC field is composed of the BCH (63, 12, 2) encoding of the first 63 bits of the operation control structure and one parity bit.
- the Operation Control Body has a specific format as described below and is filled in by the OLT CT based on clearly specified data.
- PIT PON-ID Type
- ODN category (3 bits): Identifies the transceiver optical interface parameters according to the ODN optical path loss (OPL) class defined in the applicable PMD layer standard.
- ODN category encoding definition for 50G-PON is shown in Table 4.
- Downstream FEC Flag (1 bit): Indicates whether FEC is enabled in the downstream direction. When this bit is set to 1, FEC in the downstream direction is enabled. A value of 0 is reserved.
- P Flag (1 bit): Protocol indicator for the TC layer protocol. When this bit is set to 1, the TC layer protocol is used. A value of 0 is reserved.
- PON-ID 32 bits, static, operator-assigned: identifies the OLT within a domain.
- the PON-ID consists of the following two fields:
- DWLCH ID (4 bits): Contains the downstream wavelength channel available in a given PON system. The index of the wavelength channel in the ordered set. In TDM systems, the value of DWLCH ID is 0xF.
- Table 1 shows a schematic diagram of the ODN optical path loss classification coding provided by the ITU-T G.9804 standard. As shown in Table 1, the code values represented by these three bits can distinguish the corresponding ODN levels of N1, N2, E1, E2, and C+, that is, the corresponding optical path loss range of the ODN.
- the ONU connected to the PON system will obtain the Burst_Profile information of the ONU upstream through continuous configuration learning. Based on its own transceiver specifications and the variable transmission power capability, the ONU responds to the SN grant through Serial_Number_ONU and provides an indication of the ONU's transmission power variable capability.
- the Serial_Number_ONU message includes an indication of the ONU's transmit power capability and adjustment status (byte 38), and optionally an indication that the ONU's transmit index does not match the current OLT's receive index (byte 40):
- the adjustment method is as follows (regardless of whether the ONU uplink transmit power is adjusted, the uplink FEC uses the default code type at this stage):
- the ONU's transmission specification exceeds the ONU's transmission capability indicated by the OLT, but the ONU's transmitter has power adjustment capability. In this case, the upstream signal transmitted by the ONU may overload the OLT's receiver. Therefore, the ONU needs to reduce its transmission power to meet the OLT's reception specification.
- the ONU's transmission specification is lower than the ONU's transmission capability indicated by the OLT. In this case, the upstream signal transmitted by the ONU may not be correctly received by the OLT. Therefore, the ONU may need to increase its transmission power to meet the OLT's reception specification.
- the OLT further configures the upstream transmission parameters of the ONU.
- the OLT After the ONU completes its response to the SN grant, the OLT receives the Serial_Number_ONU message uploaded by the ONU, regardless of whether the ONU is adjusted.
- the ONU can only transmit optical power within its own transmission specifications.
- the optical signal power received by the OLT causes the OLT receiver to overload and must first undergo power leveling attenuation. If the signal is retransmitted after a 3dB reduction, the OLT's BER may not meet the required level, resulting in a failure to receive the signal normally. In either case, the OLT will reissue an SN grant to the ONU that is unable to receive the signal normally and specify a new ONU upstream burst profile template index in the Burst_Profile index corresponding to the BWmap. After the ONU configures the new upstream burst profile, it will resend the Serial_Number_ONU message to the OLT.
- the ONU does not support optional FEC and cannot be activated online, it should be classified as an ONU type that cannot be activated online due to the incompatibility between the ONU transmitter specification (i.e., the transmission specification of the optical network terminal in the above embodiment) and the current OLT receiver sensitivity specification (i.e., the access capability of the optical terminal equipment in the above embodiment), and should be replaced by the operator.
- the ONU transmitter specification i.e., the transmission specification of the optical network terminal in the above embodiment
- the current OLT receiver sensitivity specification i.e., the access capability of the optical terminal equipment in the above embodiment
- OLT broadcasts the upstream burst configuration information required for ONU to go online and the quiet window for new online ONU activation and registration in a certain form, including the ODN class (ODN class) in the PSBd data block OC body/the system configuration (System_Profile) shown in Table 2/the burst configuration (Burst_Profile) shown in Table 4/the serial number authorization (SN grant), etc.
- ODN class ODN class
- System_Profile system configuration
- Burst_Profile burst configuration
- SN grant serial number authorization
- the ONU After the ONU is connected to the PON system, it passively receives the downstream physical frame, obtains the upstream burst configuration necessary for the ONU to go online and activate from the PSBd, and attempts to synchronize the clock with the OLT.
- the ONU's transmission specification is higher than the ONU's transmission capability indicated by the OLT.
- the ONU reduces its transmission optical power to meet the OLT's receiving capability or the ONU's transmission capability indicated by the OLT.
- the ONU's transmission specification is lower than the ONU's transmission capability indicated by the OLT.
- the ONU increases its transmission optical power to meet the OLT's receiving capability. After the ONU completes the transmission optical power adjustment, it needs to send a Serial_Number_ONU response message to the OLT in the quiet window specified by the OLT. S4.
- the OLT After the OLT receives the Serial_Number_ONU message sent by the ONU, it will further The sign_ONU-ID assigns an ONU-ID and Alloc-ID to the newly online ONU, and performs Power Leveling adjustment, ranging between the OLT and the ONU, registration, and entry into the working state. These operations are the same as the standard and are not described in detail here.
- the ONU can also report to the OLT its transmit power adjustability (referred to as transmit power adjustment capability), transmit power adjustment status, and its own transmit indication information. After receiving such information, the OLT can also further update the Burst_Profile assigned to the ONU.
- the ONU reporting this information or the OLT updating the ONU's Burst_Profile can also be performed after the ONU enters the normal working state. This is not limited in this embodiment.
- the ONU workflow when the ONU transmission specification is lower than the OLT receiving capability and the ONU can only transmit optical power within its own transmission specification.
- the ONU with low transmission specification directly sends upstream data to the OLT, and can be received normally by the OLT.
- the ONU online activation and registration process of this embodiment is consistent with the ONU online activation and registration process specified in the standard, and will not be repeated here.
- OLT broadcasts the upstream burst configuration information required for ONU to go online and the quiet window for new online ONU activation and registration in a certain form, including the ODN class (ODN class) in the PSBd data block OC body/the system configuration (System_Profile) shown in Table 2/the burst configuration (Burst_Profile) shown in Table 4/the serial number authorization (SN grant), etc.
- ODN class ODN class
- System_Profile system configuration
- Burst_Profile burst configuration
- SN grant serial number authorization
- the ONU After the ONU is connected to the PON system, it passively receives the downstream physical frame, obtains the upstream burst configuration necessary for the ONU to go online and activate from the PSBd, and attempts to synchronize the clock with the OLT.
- the ONU can only transmit optical power within its own transmission specifications, it supports transmission with attenuation of the transmitted optical power, for example, it supports the Power Levelling function specified in the standard. Once the ONU supports this function, it can automatically configure a 3dB attenuation of the transmitted optical power in S3.
- the OLT After the OLT receives the Serial_Number_ONU message sent by the ONU, it will further assign an ONU-ID, Alloc-ID, etc. to the newly online ONU through Assign_ONU-ID, and perform power leveling adjustment, ranging between the OLT and the ONU, registration, and entering the working state. These operations are the same as the standard and are not repeated here.
- the ONU can also report to the OLT its transmit optical power adjustment capability (referred to as transmit power adjustment capability), transmit power adjustment status, and its own transmit indication information. After receiving such information, the OLT can also further update the Burst_Profile assigned to the ONU.
- the ONU reporting this information or the OLT updating the ONU's Burst_Profile can also be performed after the ONU enters the normal working state. This is not limited in this embodiment.
- the ONU transmission specification is lower than the OLT receiving capability, and the ONU can only transmit optical power within its own transmission specification.
- the ONU workflow when supporting two or more FECs can be switched online.
- This embodiment is for the case where, after an ONU is connected to a PON system, an ONU with a low transmission specification directly sends upstream data to the OLT, but the OLT cannot receive it normally.
- the BER output by the receiving end is higher than the BER corresponding to the OLT receiver sensitivity specification.
- OLT broadcasts the upstream burst configuration information required for ONU to go online and the quiet window for new online ONU activation and registration in a certain form, including the ODN class (ODN class) in the PSBd data block OC body/the system configuration (System_Profile) shown in Table 2/the burst configuration (Burst_Profile) shown in Table 4/the serial number authorization (SN grant), etc.
- ODN class ODN class
- System_Profile system configuration
- Burst_Profile burst configuration
- SN grant serial number authorization
- the ONU after the ONU is connected to the PON system, it passively receives the downlink physical frame and obtains the The ONU goes online, activates the necessary upstream burst configuration, and attempts to synchronize its clock with the OLT.
- the OLT receives the upstream optical signal from the ONU but is unable to parse the data properly or, through monitoring, discovers that the output BER does not meet the reception requirements for normal system operation.
- the OLT continues to issue an SN grant and notifies the ONU to use a new forward error correction code (FEC) codeword (e.g., the first FEC codeword) for upstream data transmission.
- FEC codeword notification methods include: specifying a Burst_Profile with a new index number in the BWmap for the ONU upstream configuration, or directly specifying a higher-gain forward error correction code for the upstream through a PLOAM message.
- step S5 the ONU resets the upstream transmission configuration of the ONU according to the new FEC codeword informed by the data sent by the OLT, and sends a Serial_Number_ONU response message to the OLT during the quiet window specified by the OLT.
- the OLT After the OLT receives the Serial_Number_ONU message sent by the ONU, it will further assign an ONU-ID, Alloc-ID, etc. to the newly online ONU through Assign_ONU-ID, and perform power leveling adjustment, distance measurement between the OLT and the ONU, registration and entering the working state. These operations are the same as the standard and will not be repeated here.
- the ONU in S3 and S5 may also report to the OLT information such as its transmit power adjustability (referred to as transmit power adjustability), transmit power adjustment status, and its own transmit indication information.
- the OLT may further update the Burst_Profile assigned to the ONU.
- the ONU reporting this information or the OLT updating the ONU's Burst_Profile may also be performed after the ONU enters normal operating state. This is not limited in this embodiment.
- OLT broadcasts the upstream burst configuration information required for ONU to go online and the quiet window for new online ONU activation and registration in a certain form, including the ODN class (ODN class) in the PSBd data block OC body/the system configuration (System_Profile) shown in Table 2/the burst configuration (Burst_Profile) shown in Table 4/the serial number authorization (SN grant), etc.
- ODN class ODN class
- System_Profile system configuration
- Burst_Profile burst configuration
- SN grant serial number authorization
- the ONU After the ONU is connected to the PON system, it passively receives the downstream physical frame, obtains the upstream burst configuration necessary for the ONU to go online and activate from the PSBd, and attempts to synchronize the clock with the OLT.
- the ONU once the ONU is synchronized, it automatically attenuates the transmitted optical power by 3dB, and then The specified quiet window sends a Serial_Number_ONU response message to the OLT.
- the ONU can only transmit optical power within its own transmission specifications, it supports transmitter power attenuation for transmission, such as the Power Levelling function specified in the standard. Once the ONU supports this function, it can automatically configure a 3dB transmission optical power attenuation in Step 3.
- the OLT receives the upstream optical signal from the ONU but is unable to parse the data properly or, through monitoring, discovers that the output BER does not meet the reception requirements for normal system operation.
- the OLT continues to issue an SN grant and notifies the ONU to use a new forward error correction code (FEC) codeword (e.g., the first FEC codeword) for upstream data transmission.
- FEC codeword notification methods include: specifying a Burst_Profile with a new index number in the BWmap for the ONU upstream configuration, or directly specifying a higher-gain forward error correction code for the upstream through a PLOAM message.
- the OLT After the OLT receives the Serial_Number_ONU message sent by the ONU, it will further assign an ONU-ID, Alloc-ID, etc. to the newly online ONU through Assign_ONU-ID, and perform power leveling adjustment, distance measurement between the OLT and the ONU, registration and entering the working state. These operations are the same as the standard and will not be repeated here.
- the transmission parameters include at least one of the following: transmission optical power; forward error correction coding.
- the access capability includes at least one of the following: receiving capability of the optical terminal device; Transmission capability of network terminal equipment; optical distribution network (ODN) level; forward error correction coding.
- ODN optical distribution network
- the receiving capability of the optical terminal device includes: receiver sensitivity; the transmitting capability of the optical network terminal device includes: average transmitted optical power; the optical distribution network ODN level includes at least one of the following: ODN levels corresponding to different optical link loss ranges, ODN levels corresponding to different receiver sensitivities in the same optical link loss range, and ODN levels corresponding to different average transmitted optical powers in the same optical link loss range; and the forward error correction coding includes: at least two different forward error correction codes.
- the receiver sensitivity includes at least one of the following: sensitivity at a given bit error rate (BER), and OMA sensitivity at a given bit error rate (BER);
- the average transmitted optical power includes at least one of the following: minimum average transmitted power, minimum OMA-TDEC transmitted power, and minimum OMA transmitted power.
- the optical network terminal device If the transmission specification of the optical network terminal device is higher than the access capability, the optical network terminal device reduces its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device increases its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device transmits optical power according to its own transmission specification.
- the transmission specification of the optical network terminal device includes: average transmission optical power; the average transmission optical power includes at least one of the following: minimum average transmission power, minimum OMA-TDEC transmission power, and minimum OMA transmission power.
- the transmission parameters include: forward error correction coding of the optical network terminal device; if the transmission specification of the optical network terminal device is lower than the receiving capability of the optical central office device, the optical network terminal device determines the transmission parameters according to the access capability, including one of the following:
- the optical network terminal device automatically performs an attenuation operation of a first preset power; if the power of the optical signal sent by the optical network terminal device to the optical central office device does not meet the receiving capability of the optical central office device, the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword.
- the notification method of the first FEC codeword includes one of the following: specifying the burst configuration information of the new index number for the optical network terminal device in the bandwidth allocation mapping table; specifying the optical network terminal device to use the first FEC codeword with a higher coding gain than the default FEC codeword through a first management message.
- the communication method further includes: the optical central office device receiving the transmission power adjustment capability, transmission power adjustment status and transmission instruction information reported by the optical network terminal device.
- the transmit power adjustment capability and transmit power adjustment status are carried in a sequence number message.
- the communication method further includes: the optical central office device receiving a response message of the serial number authorization sent by the optical network terminal device within a pre-configured quiet window according to the transmission parameters.
- the communication device provided in this embodiment is configured to implement the communication method applied to the optical central office device and the optical network terminal device of the embodiment shown in FIG3 .
- the implementation principle and technical effects of the communication device provided in this embodiment are similar and will not be described in detail here.
- the transmitter 810 is configured to send the access capability to the optical network terminal device, so that the optical network terminal device determines the transmission parameters according to the access capability.
- the receiving capability of the optical terminal device includes: receiver sensitivity; the transmitting capability of the optical network terminal device includes: average transmitted optical power; the optical distribution network ODN level includes at least one of the following: ODN levels corresponding to different optical link loss ranges, ODN levels corresponding to different receiver sensitivities in the same optical link loss range, and ODN levels corresponding to different average transmitted optical powers in the same optical link loss range; and the forward error correction coding includes: at least two different forward error correction codes.
- the receiver sensitivity includes at least one of the following: sensitivity at a given bit error rate (BER), and OMA sensitivity at a given bit error rate (BER);
- the average transmitted optical power includes at least one of the following: minimum average transmitted power, minimum OMA-TDEC transmitted power, and minimum OMA transmitted power.
- the access capability includes any one of the following: a value indicating the access capability, an identifier indicating the access capability.
- the optical network terminal device If the transmission specification of the optical network terminal device is higher than the access capability, the optical network terminal device reduces its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device increases its transmitted optical power to meet the access capability; if the transmission specification of the optical network terminal device is lower than the access capability, the optical network terminal device transmits optical power according to its own transmission specification.
- the transmission specification of the optical network terminal device includes: average transmission optical power; the average transmission optical power includes at least one of the following: minimum average transmission power, minimum OMA-TDEC transmission power, and minimum OMA transmission power.
- the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword; the optical network terminal device uses the first high-gain FEC codeword, wherein the coding gain of the first high-gain FEC codeword is greater than the coding gain of other FEC codewords.
- the transmission parameters include: the transmission optical power and forward error correction code of the optical network terminal device; if the transmission specification of the optical network terminal device is higher than the receiving capability of the optical central office device, and the optical network terminal device can only transmit optical power within its own transmission specification, the optical network terminal device determines the transmission parameters according to the access capability, including:
- the optical network terminal device automatically performs a first preset power attenuation operation; if the optical signal power sent by the optical network terminal device to the optical central office device does not meet the receiving capacity of the optical central office device, the optical network terminal device Switching from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword.
- the notification method of the first FEC codeword includes one of the following: specifying the burst configuration information of the new index number for the optical network terminal device in the bandwidth allocation mapping table; specifying the optical network terminal device to use the first FEC codeword with a higher coding gain than the default FEC codeword through a first management message.
- the communication device applied to the optical central office equipment further includes:
- the communication device applied to the optical central office equipment further includes:
- the receiver is further configured to receive a response message of the serial number authorization sent by the optical network terminal device according to the transmission parameters within a pre-configured quiet window.
- the communication device provided in this embodiment is configured to implement the communication method applied to the optical central office device of the embodiment shown in FIG4 .
- the implementation principle and technical effects of the communication device provided in this embodiment are similar and will not be described in detail here.
- the receiving capability of the optical terminal device includes: receiver sensitivity; the transmitting capability of the optical network terminal device includes: average transmitted optical power; the optical distribution network ODN level includes at least one of the following: ODN levels corresponding to different optical link loss ranges, ODN levels corresponding to different receiver sensitivities in the same optical link loss range, and ODN levels corresponding to different average transmitted optical powers in the same optical link loss range; and the forward error correction coding includes: at least two different forward error correction codes.
- the receiver sensitivity includes at least one of the following: sensitivity at a given bit error rate (BER), and OMA sensitivity at a given bit error rate (BER);
- the average transmitted optical power includes at least one of the following: minimum average transmitted power, minimum OMA-TDEC transmitted power, and minimum OMA transmitted power.
- the access capability is sent in at least one of the following ways: broadcasting the access capability; multicasting the access capability; and unicasting the access capability.
- the access capability includes any one of the following: a value indicating the access capability, an identifier indicating the access capability.
- the transmission parameters include: the transmission optical power of the optical network terminal device; the transmission parameters are determined according to the access capability, including one of the following:
- the transmission specification of the optical network terminal device includes: average transmission optical power; the average transmission optical power includes at least one of the following: minimum average transmission power, minimum OMA-TDEC transmission power, and minimum OMA transmission power.
- the optical network terminal device automatically performs an attenuation operation of the first preset power.
- the transmission parameters include: forward error correction coding of the optical network terminal device; if the transmission specification of the optical network terminal device is lower than the receiving capability of the optical central office device, the transmission parameters are determined according to the access capability, including one of the following:
- the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword; the optical network terminal device uses the first high-gain FEC codeword, wherein the coding gain of the first high-gain FEC codeword is greater than the coding gain of other FEC codewords.
- the optical network terminal device automatically performs an attenuation operation of a first preset power; if the power of the optical signal sent by the optical network terminal device to the optical central office device does not meet the receiving capability of the optical central office device, the optical network terminal device switches from the default FEC codeword to the first FEC codeword; wherein the coding gain of the first FEC codeword is greater than the coding gain of the default FEC codeword.
- the transmitter is configured to send a response message of the serial number authorization to the optical central office device within a pre-configured quiet window according to the transmission parameters.
- the memory 1020 may further include a memory remotely located relative to the processor 1010, and these remote memories may be connected to the device via a network.
- a network examples include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
- An embodiment of the present application also provides a storage medium containing computer-executable instructions.
- the computer-executable instructions are executed by a computer processor, they are used to perform a communication method.
- the method includes: the optical central office device sends access capabilities to the optical network terminal device; the optical network terminal device determines transmission parameters according to the access capabilities.
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Abstract
本申请提出通信方法、设备及存储介质。该通信方法包括:在光局端设备分配光网络终端设备标识之前,光局端设备向光网络终端设备发送接入能力;所述光网络终端设备按照所述接入能力确定发射参数。
Description
本申请涉及通信技术领域,具体涉及通信方法、设备及存储介质。
在50G无源光网络(Passive Optical Network,PON)领域中,同一个光分配网络(Optical Distribution Network,ODN)等级下,50G上行速率出现了两套不同的接入机指标。这意味着设备厂商和运营商需要在同一个ODN场景下选择其中之一作为生产和部署的设备。这无疑增加了设备厂商设计制造的复杂性、运营商的部署成本,甚至可能造成PON市场的分化。因此,有必要解决两套不同接入机指标之间的兼容性问题。
发明内容
本申请实施例提供通信方法、设备及存储介质,有效解决了相关技术中两套不同接入机指标之间的兼容性问题。
本申请实施例提供一种通信方法,在光局端设备分配光网络终端设备标识之前,包括:
光局端设备向光网络终端设备发送接入能力;所述光网络终端设备按照所述接入能力确定发射参数。
本申请实施例提供一种通信方法,应用于光局端设备,在所述光局端设备分配光网络终端设备标识之前,包括:
向光网络终端设备发送接入能力,以使所述光网络终端设备按照所述接入能力确定发射参数。
本申请实施例提供一种通信方法,应用于光网络终端设备,在光局端设备向所述光网络终端设备分配光网络终端设备标识之前,包括:
接收光局端设备发送的接入能力;按照所述接入能力确定发射参数。
本申请实施例提供一种通信设备,包括:存储器,以及一个或多个处理器;所述存储器,配置为存储一个或多个程序;当所述一个或多个程序被所述一个或多个处理器执行,使得所述一个或多个处理器实现上述任一实施例所述的通信方法。
本申请实施例提供一种存储介质,所述存储介质存储有计算机程序,所述
计算机程序被处理器执行时实现上述任一实施例所述的通信方法。
图1是相关技术提供的一种同一个ODN等级下两个不同的PON收发规范的实现示意图;
图2是相关技术提供的一种同一个ODN等级下两个不同的PON收发规范的兼容性问题的解决示意图;
图3是本申请实施例提供的一种通信方法的流程图;
图4是本申请实施例提供的另一种通信方法的流程图;
图5是本申请实施例提供的又一种通信方法的流程图;
图6是本申请实施例提供的一种下行物理同步块PSBd的OC body的配置示意图;
图7是本申请实施例提供的一种通信装置的结构框图;
图8是本申请实施例提供的另一种通信装置的结构框图;
图9是本申请实施例提供的又一种通信装置的结构框图;
图10是本申请实施例提供的一种通信设备的结构示意图。
下文中将结合附图对本申请的实施例进行说明。以下结合实施例附图对本申请进行描述,所举实例仅用于解释本申请,并非用于限定本申请的范围。
PON系统中,光线路终端(Optical Line Termination,OLT)与光网络单元(Optical Network Unit,ONU)之间由光分配网络(Optical Distribution Network,ODN)连接。随着ONU和OLT之间光纤距离、分光比和分光器级联层级的不同,ONU与OLT之间的ODN损失也不同。因此,在相同的ONU发射规范下,不同位置处部署的ONU对OLT处的接收光功率带来较大差异。需要OLT提供高动态范围的接收机才能避免接收过载。
图1是相关技术提供的一种同一个ODN等级下两个不同的PON收发规范的实现示意图,如图1所示,在同一个ODN等级下,存在两个不同的PON收发规范。其中,高发射功率规范ONU需要接入高接收功率规范的OLT;低发射功率规范ONU需要接入低接收功率规范的OLT。
OLT向ONU发送数据称为下行发送,而ONU向OLT发送数据则为上行发送。为了避免使用高动态接收机,在相关技术中,规范了Power Levelling功能,
通过减小ONU的发射光功率,从而避免OLT接收机过载。OLT通过发送Change_Power_Level和Upstream_Overhead消息向ONU传递ONU发射功率控制信号;而在上行方向,ONU则通过Serial_Number_ONU来反馈当前ONU调整的发射光功率。
除了Power levelling机制,ONU并无其他调整发射功率的方法。图2是相关技术提供的一种同一个ODN等级下两个不同的PON收发规范的兼容性问题的解决示意图。如图2所示,Power levelling是基于3dB为步长只能对发射机的放光功率进行衰减。这种调整功率的方法并不能很好的解决同一个ODN下,不同收发指标的兼容性问题。比如,低发射光功率标准的ONU不能保证满足高功率收发指标规范中OLT的接收机灵敏度要求,同理,高发射光功率标准的ONU经过Power Levelling衰减3dB后,也不能保证满足高功率收发指标规范中OLT的接收机灵敏度规范。另外,高发射光功率标准的ONU直接接入低功率收发指标规范中的PON网络后,也可能造成OLT接收机过载。
Power levelling可以部分解决兼容性问题,即高功率规范ONU经过3dB衰减后,有一部分ONU的发射光功率能够被低接收功率规范的OLT接收,这个取决于ONU在ODN的具体位置和经过的分光比。以G.984.3为例,Power levelling机制提供三种ONU发射光功率:标称光功率,标称光功率-3dB,标称光功率-6dB;从而在一定程度上,它可以解决高发射功率规范ONU对低接收功率规范OLT接收机造成过载的问题。Power Levelling功能的最初目的并不是用于解决上述兼容性问题,而是用于ONU节能。将Power Levelling功能用于解决上述兼容性问题仍需要进行相应的修订且无法完整的解决该问题。
Power Levelling一共包含两种ONU发射光功率调整方式:
第一种方式:由ONU进行功率调整激活
该类方式下的功率调整激活在ONU上线激活的过程中体现。ONU的上线激活过程如下:
ONU被动接收OLT的下行数据帧,并接收PSync进行超帧同步;ONU完成超帧同步后,等待Upstream_Overhead PLOAM消息,可选的,还可以等待接收Extended_Burst_Length PLOAM消息;ONU接收PON的运行参数并进行配置,比如,预设时延pre-assigned delay,以及,初始光功率级别initial optical power level,这个初始光功率级别是ONU自身无法进行调节的,只能按照OLT设置的大小进行上行光信号的发射;ONU一旦接收到了OLT周期性广播的Serial number request,那么就根据初始的运行参数向OLT发送Serial_Number_ONU,以表明上线请求;当ONU开启Power levelling功能后,它就可以通过不断循环的调整其发射光功率,并通过向OLT发送Serial_Number_ONU消息作为没有接
收到OLT发送的Assign_ONU-ID消息的否定应答,且Serial_Number_ONU消息中指示其当前所使用的发射光功率,ONU调整功率的方式为模3循环(..0,1,2,0,1,2..),整个循环过程会一直持续到ONU获得OLT下发的disable ONU消息或者Assign_ONU-ID消息为止;在OLT发现新ONU的Serial_Number_ONU之后,就会通过Assign_ONU-ID直接发送消息给该ONU指派ONU-ID;OLT通过带宽映射表下发一个直接的Serial number request给这个新接入ONU,并精确计时其反馈时间;ONU向OLT发送反馈消息,OLT接收之后,为该ONU单独计算等效时延EqD,并通过Ranging_Time消息告知该ONU;ONU基于等效时延EqD调整其GTC frame的起始时刻,并完成上线计划进入正常运行状态。
在ONU进入正常运行状态后,OLT监控ONU上行传输数据的phase和BER,可能进行重新计算EqD并对其进行更新,甚至动态的调整ONU的光发射功率。
第二种方式:由OLT进行功率调整激活。
OLT动态调整ONU的发射光功率是通过下发Change_Power_Level PLOAM消息实现的,并且每次触发ONU的发射光功率调整都会导致ONU从当前状态跳转到ONU初始激活状态,并重新进行上线激活。OLT进行ONU功率调整激活只会在ONU的测距状态和工作状态出现。
在标准中,Power levelling的功能得到了继承,在ONU响应SN授权(SN grant)的时候,Serial_Number_ONU消息中的Attenuation和Power levelling capability均可以对ONU的发射功率按照3的1~7个整数倍的dB进行衰减发射。
本申请实施例中的光局端设备可以包括:PON系统中的OLT,或者光纤到房间(FTTR)中的主设备(MFU);相应的,光网络终端设备可以包括:PON系统中的ONU,或者,FTTR中的从设备(SFU)。
在一实施例中,图3是本申请实施例提供的一种通信方法的流程图。本实施例应用于兼容多个不同接入机指标的情况。本实施例可以由光局端设备和光网络终端设备执行。如图3所示,本实施例包括:S310-S320。
S310、光局端设备向光网络终端设备发送接入能力。
光局端设备发送的接入能力指的是可以与光局端设备相匹配的接入能力。在实施例中,在光局端设备向光网络终端设备分配光网络终端设备标识之前,光局端设备可以向光网络终端设备发送与自身相匹配的接入能力。
S320、光网络终端设备按照接入能力确定发射参数。
在实施例中,在光网络终端设备按照光局端设备自身相匹配的接入能力动态调整自身的发射参数,以使自身的发射参数可以与光局端设备的接入能力相
匹配,进而可以使光网络终端设备成功与光局端设备进行通信连接。
在一实施例中,发射参数至少包括下述之一:发射光功率;前向纠错编码。
在一实施例中,接入能力至少包括下述之一:光局端设备的接收能力;光网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
在一示例中,光局端设备可以向光网络终端设备显式的发送接入能力,即光局端设备直接向光网络终端设备发送该光局端设备支持的光局端设备的接收能力和/或光网络终端设备的发射能力。在一示例中,光局端设备也可以向光网络终端设备隐式的发送接入能力,比如,光局端设备向光网络终端设备发送ODN等级,光网络终端设备可以通过物理层规范进行对照,也可以获得当前ODN等级下的光局端设备的接收能力,以及光网络终端设备的发射能力。在一示例中,光局端设备也可以向光网络终端设备发送前向纠错编码,光网络终端设备可以按照默认FEC码字或其它新增的FEC码字进行编码,以使自身的发射光功率可以满足光局端设备相匹配的接收能力,或者光局端设备相匹配的光网络终端设备的发射能力。在一示例中,光网络终端设备的发射能力指的是与光局端设备的接收机规范相匹配的发射能力。
在一实施例中,光局端设备的接收能力包括:接收机灵敏度;光网络终端设备的发射能力包括:平均发射光功率;光分配网络ODN等级至少包括下述之一:不同光链路损耗范围对应的ODN等级、同一个光链路损耗范围对应不同接收机灵敏度的ODN等级、同一个光链路损耗范围对应不同平均发射光功率的ODN等级;前向纠错编码包括:至少两个不同的前向纠错编码。在一示例中,每个前向纠错编码所对应FEC码字的编码增益是不同的。
在一实施例中,接收机灵敏度至少包括下述之一:给定误码率BER下的灵敏度、给定误码率BER下的光调制幅度(Optical Modulation Amplitude,OMA)灵敏度;平均发射光功率至少包括下述之一:最小平均发射功率、最小光调制幅度-传输色散眼图闭合(Optical Modulation Amplitude-Transmitter and Dispersion Eye Closure,OMA-TDEC)发射功率、最小OMA发射功率。
在一实施例中,接入能力的发送方式至少包括下述之一:广播发送接入能力;多播发送接入能力;单播发送接入能力。在一示例中,光局端设备可以向光网络终端设备广播接入能力,比如,可以周期性广播、间歇性广播、按需单次或多次广播、或者广播频率可调整等。在一示例中,光局端设备也可以采用多播形式向光网络终端设备发送接入能力,比如,可以在一个特有的光网络终端设备的群体中进行多播(也可以称为组播)等。在一示例中,光局端设备也可以采用单播方式向光网络终端设备发送接入能力,即光局端设备与光网络终端设备之间实现点对点网络连接。
在一实施例中,接入能力包括以下任意之一:指示接入能力的数值、指示接入能力的标识。在一示例中,光局端设备可以向光网络终端设备发送代表接入能力的数值,也可以向光网络终端设备发送代表接入能力的标识。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;光网络终端设备按照接入能力确定发射参数,包括下述之一:
若光网络终端设备的发射规范高于接入能力,光网络终端设备降低其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备增大其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备按自身发射规范发射光功率。在一示例中,光网络终端设备的发射规范可以理解为在光网络终端设备出厂时所配置的发射规范;接入能力可以理解为与光局端设备相匹配的接入能力。
在一实施例中,光网络终端设备的发射规范包括:平均发射光功率;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,光网络终端设备的发射规范高于接入能力至少包括以下之一:
光网络终端设备的最小平均发射功率高于光局端设备发送的最小平均发射功率;光网络终端设备的最小OMA-TDEC发射功率高于光局端设备发送的最小OMA-TDEC发射功率;光网络终端设备的最小OMA发射功率高于光局端设备发送的最小OMA发射功率;光网络终端设备的最小平均发射功率高于光局端设备发送的给定误码率BER下的灵敏度和光网络终端设备与光局端设备之间的光链路预算之和;光网络终端设备的最小OMA发射功率高于光局端设备发送的给定误码率BER下的OMA灵敏度和光网络终端设备与光局端设备之间的光链路预算之和。
在一实施例中,光网络终端设备的发射规范低于接入能力至少包括以下之一:
光网络终端设备的最小平均发射功率低于光局端设备发送的最小平均发射功率;光网络终端设备的最小OMA-TDEC发射功率低于光局端设备发送的最小OMA-TDEC发射功率;光网络终端设备的最小OMA发射功率低于光局端设备发送的最小OMA发射功率;光网络终端设备的最小平均发射功率低于光局端设备发送的给定误码率BER下的灵敏度和光网络终端设备与光局端设备之间的光链路预算之和;光网络终端设备的最小OMA发射功率低于光局端设备发送的给定误码率BER下的OMA灵敏度和光网络终端设备与光局端设备之间的光链路预算之和。
在一实施例中,光网络终端设备与光局端设备之间的光链路预算至少包括:光分配网络ODN等级所对应的最大光链路损耗OPL的绝对值。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作。
在一示例中,第一预设功率可以为预先配置的发射光功率的数值。在光网络终端设备的发射规范高于光局端设备的接收能力的情况下,光网络终端设备可以对自身的发射光功率自动进行一个或多个第一预设功率的衰减。比如,第一预设功率可以为3dB,则光网络终端设备可以对自身的发射光功率进行1-7个整数倍的3dB的衰减。
在一实施例中,发射参数包括:光网络终端设备的前向纠错编码;若光网络终端设备的发射规范低于光局端设备的接收能力,光网络终端设备按照接入能力确定发射参数,包括以下之一:
光网络终端设备从默认FEC码字切换至第一FEC码字,其中,第一FEC码字的编码增益大于默认FEC码字的编码增益;光网络终端设备使用第一高增益FEC码字,其中,第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
在一示例中,若光网络终端设备的发射规范低于光局端设备的接收能力,光网络终端设备可以从当前所采用的默认FEC码字切换至第一FEC码字,并采用第一FEC码字进行前向纠错,若光网络终端设备采用第一FEC码字进行编码之后,仍然无法达到光局端设备相匹配的接入能力,此时可以继续采用比第一FEC码字的编码增益稍高的第二FEC码字,再次进行编码,直至光网络终端设备的前向纠错编码与光局端设备的前向纠错编码相匹配为止。在一示例中,若光网络终端设备的发射规范低于光局端设备的接收能力,并且,第一高增益FEC码字的编码增益大于其它的所有FEC码字的编码增益,光网络终端设备可以直接采用第一高增益FEC码字进行前向纠错,以满足光局端设备的前向纠错编码要求。
在一实施例中,发射参数包括:光网络终端设备的发射光功率和前向纠错编码;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作;若光网络终端设备发送至光局端设备的光信号功率不满足光局端设备的接收能力,光网络终端设备
从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益。
在一示例中,在光网络终端设备的发射规范高于光局端设备的接收能力的情况下,光网络终端设备可以先进行第一预设功率的衰减,若光网络终端设备发送到光局端设备的光信号功率仍无法满足光局端设备的接收能力,光网络终端设备可以从默认FEC码字切换至第一FEC码字,以对光网络终端设备发射的光信号进行前向纠错。当然,若光网络终端设备采用第一FEC码字进行编码之后,仍无法满足光局端设备的接收能力,可以采用第二FEC码字、第三FEC码字或第N FEC码字对光网络终端设备发射的光信号再次进行前向纠错,直至满足光局端设备的接收能力为止。其中,第二FEC码字的编码增益大于第一FEC码字的编码增益;第三FEC码字的编码增益大于第二FEC码字的编码增益;第N FEC码字的编码增益大于第N-1FEC码字的编码增益。
在一实施例中,第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定光网络终端设备采用比默认FEC码字更高编码增益的第一FEC码字。在一示例中,带宽分配映射表也可以简称为Bwmap;第一管理消息可以为PLOAM消息。
在一实施例中,通信方法,还包括:光局端设备接收光网络终端设备上报的发射功率调整能力、发射功率调整情况和发射指示信息。在一示例中,发射功率调整能力用于表征光网络终端设备是否支持发射光功率调整;发射功率调整情况用于表征光网络终端的发射光功率是否已调整完成;发射指示信息用于指示光网络终端自身的发射规范。
在一实施例中,发射功率调整能力和发射功率调整情况采用序列号消息承载。在一示例中,序列号消息可以为Serial Number ONU message。
在一实施例中,通信方法,还包括:光局端设备接收光网络终端设备按照发射参数在预先配置的安静窗口内发送的序列号授权的响应消息。
在一实施例中,图4是本申请实施例提供的另一种通信方法的流程图。本实施例应用于兼容多个不同接入机指标的情况。本实施例可以由光局端设备执行。如图4所示,本实施例包括:S410。
S410、向光网络终端设备发送接入能力,以使光网络终端设备按照接入能力确定发射参数。
在一实施例中,发射参数至少包括下述之一:发射光功率;前向纠错编码。
在一实施例中,接入能力至少包括下述之一:光局端设备的接收能力;光
网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
在一实施例中,光局端设备的接收能力包括:接收机灵敏度;光网络终端设备的发射能力包括:平均发射光功率;光分配网络ODN等级至少包括下述之一:不同光链路损耗范围对应的ODN等级、同一个光链路损耗范围对应不同接收机灵敏度的ODN等级、同一个光链路损耗范围对应不同平均发射光功率的ODN等级;前向纠错编码包括:至少两个不同的前向纠错编码。
在一实施例中,接收机灵敏度至少包括下述之一:给定误码率BER下的灵敏度、给定误码率BER下的OMA灵敏度;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,接入能力的发送方式至少包括下述之一:广播发送接入能力;多播发送接入能力;单播发送接入能力。
在一实施例中,接入能力包括以下任意之一:指示接入能力的数值、指示接入能力的标识。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;光网络终端设备按照接入能力确定发射参数,包括下述之一:
若光网络终端设备的发射规范高于接入能力,光网络终端设备降低其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备增大其发射光功率,以满足接入能力;若所述光网络终端设备的发射规范低于所述接入能力,所述光网络终端设备按自身发射规范发射光功率。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作。
在一实施例中,发射参数包括:光网络终端设备的前向纠错编码;若光网络终端设备的发射规范低于光局端设备的接收能力,光网络终端设备按照接入能力确定发射参数,包括下述之一:
光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益;光网络终端设备使用第一高增益FEC码字,其中,第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
在一实施例中,发射参数包括:光网络终端设备的发射光功率和前向纠错编码;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定
发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作;若光网络终端设备发送至光局端设备的光信号功率不满足光局端设备的接收能力,光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益。
在一实施例中,第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定光网络终端设备采用比默认FEC码字更高编码增益的第一FEC码字。
在一实施例中,应用于光局端设备的通信方法,还包括:接收光网络终端设备上报的发射功率调整能力、发射功率调整情况和发射指示信息。
在一实施例中,应用于光局端设备的通信方法,还包括:接收光网络终端设备按照发射参数在预先配置的安静窗口内发送的序列号授权的响应消息。
应用于光局端设备的通信方法中涉及到的接入能力、发射参数、ODN等级等参数的解释,可参见上述应用于光局端设备与光网络终端设备交互的通信方法中对应参数的描述,在此不再赘述。
在一实施例中,图5是本申请实施例提供的又一种通信方法的流程图。本实施例应用于兼容多个不同接入机指标的情况。本实施例可以由光网络终端设备执行。如图5所示,本实施例包括:S510-S520。
S510、接收光局端设备发送的接入能力。
S520、按照接入能力确定发射参数。
在一实施例中,发射参数至少包括下述之一:发射光功率;前向纠错编码。
在一实施例中,接入能力至少包括下述之一:光局端设备的接收能力;光网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
在一实施例中,光局端设备的接收能力包括:接收机灵敏度;光网络终端设备的发射能力包括:平均发射光功率;光分配网络ODN等级至少包括下述之一:不同光链路损耗范围对应的ODN等级、同一个光链路损耗范围对应不同接收机灵敏度的ODN等级、同一个光链路损耗范围对应不同平均发射光功率的ODN等级;前向纠错编码包括:至少两个不同的前向纠错编码。
在一实施例中,接收机灵敏度至少包括下述之一:给定误码率BER下的灵敏度、给定误码率BER下的OMA灵敏度;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,接入能力的发送方式至少包括下述之一:广播发送接入能
力;多播发送接入能力;单播发送接入能力。
在一实施例中,接入能力包括以下任意之一:指示接入能力的数值、指示接入能力的标识。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;按照接入能力确定发射参数,包括下述之一:
若光网络终端设备的发射规范高于接入能力,光网络终端设备降低其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备增大其发射光功率,以满足接入能力;若所述光网络终端设备的发射规范低于所述接入能力,所述光网络终端设备按自身发射规范发射光功率。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作。
在一实施例中,发射参数包括:光网络终端设备的前向纠错编码;若光网络终端设备的发射规范低于光局端设备的接收能力,按照接入能力确定发射参数,包括下述之一:
光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益;光网络终端设备使用第一高增益FEC码字,其中,第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
在一实施例中,发射参数包括:光网络终端设备的发射光功率和前向纠错编码;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作;若光网络终端设备发送至光局端设备的光信号功率不满足光局端设备的接收能力,光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益。
在一实施例中,第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定光网络终端设备采用比默认FEC码字更高编码增益的第一FEC码字。
在一实施例中,应用于光网络终端设备的通信方法,还包括:向光局端设备上报发射功率调整能力、发射功率调整情况和发射指示信息。
在一实施例中,应用于光网络终端设备的通信方法,还包括:按照发射参数在预先配置的安静窗口内向光局端设备发送序列号授权的响应消息。
应用于光网络终端设备的通信方法中涉及到的接入能力、发射参数、ODN等级等参数的解释,可参见上述应用于光局端设备与光网络终端设备交互的通信方法中对应参数的描述,在此不再赘述。
在下述实施例中,以光局端设备为PON系统中的OLT,以及光网络终端设备为PON系统中的ONU为例,对按照接入能力确定发射参数的实现过程进行说明。当然,本申请实施例也同样适用于FTTR中的MFU,以及FTTR中的SFU。
图6是本申请实施例提供的一种PSBd下行物理同步块的OC body的配置示意图,如图6所示,定义了3bits的ODN等级。
操作控制结构包含一个51比特操作控制主体(OC body)和一个13比特的HEC字段,见图6。HEC字段是由操作控制结构前63位比特的BCH(63,12,2)编码和1个奇偶校验比特构成。
操作控制主体具有如下所述的特定格式,并由OLT CT根据明确指定的数据进行填写。
如图6所示,在下行方向线速为49.7664Gbit/s时,操作控制实体的具体值规定如下:
a)PON-ID类型(PIT)(8比特,静态,运营商分配):ODN架构的指示,报告的发射功率的来源和ODN类别。PIT字段的进一步划分如下:
RE标志(1比特):指示发射光电平(TOL)字段是否包含OLT CT的发射功率(RE=0)或包含扩展器的发射功率(RE=1);ODN类别(3比特):根据适用的PMD层标准中定义的ODN光路损耗(OPL)类,识别收发器光接口参数。50G-PON的ODN类别编码定义见表4。
下行FEC标志(1比特):指示是否在下行方向上启用了FEC。当这个位被置1时,下行方向的FEC被启用。0值保留;P标志(1比特):TC层协议的协议指示标志。当此位置为1时,将使用TC层协议。0值保留;链路类型(2比特):在适用的PMD标准中描述的光链路类型。
b)PON-ID(32比特,静态的,运营商分配):标识某个域内的OLT。PON-ID由以下两个字段组成:
管理标签(28比特):由EMS/OSS根据特定的物理或逻辑编号计划提供给OLT CT。管理标签由OLT CT透明地处理。
DWLCH ID(4比特):包含在给定的PON系统中可用的下行波长通道的
有序集合内的波长通道的索引。在TDM系统中,DWLCH ID的值为0xF。
c)R(1比特):保留以供将来使用,设置为0。
d)C(1比特):发射光电平参考点指示器。C=0时,下面的TOL值指S/R-CG参考点(在TDM系统的情况下),C=1时,下面的TOL值指S/R-CP参考点。
TOL(9比特,动态,由系统维护):发送光电平。如果RE=0,TOL指示当前OLT CT收发器发送到ODN的发射功率(在C位指示的参考点),如果RE=1,TOL指示到达扩展器收发器的发射功率。它的值是一个整数,表示对-30dBm具有0.1dB粒度的对数功率度量(即,值0表示-30dBm,0x12C表示0dBm,0x1FE表示21dBm)。0x1FF默认值表示在给定的PON接口上不支持TOL。
表1是ITU-T G.9804标准提供的一种ODN光路损耗分类编码的示意表。如表1所示,这3bit位所代表的代码值能够区分N1、N2、E1、E2、C+所对应的ODN等级,即ODN所对应的光路损耗范围。
表1 ODN光路损耗(OPL)分类编码
在上述表1中,每一个ODN等级对应的光路损耗范围都有一个明确的物理层规范(PMD table),即用以明确ONU发射机和OLT接收机指标规范。但是对于同一个ODN损耗等级而言,对N1和C+两个ODN等级均分别定义了两套不同的ONU发射机和OLT接收机指标规范。上述代码值000会对应N1、N1b两个不同的ONU发射机和OLT接收机指标规范;代码值100也会对应C+、C+b两个不同的ONU发射机和OLT接收机指标规范;继续沿用上述标准中的OC body的这3个比特中的ODN OPL等级N1和C+已经无法区分开到底采用哪套收发机指标规范。
因此,一种可行的办法是继续增加如表1中所示Code value的值,将同一个ODN等级下不同的收发规范视用两个不同的代码值进行指示;比如,本申请实施例中可提供:101代表N1b,110代表C+b。或者,还可以不增加上述代码值而是通过对System_Profile PLOAM消息的保留位进行重新定义,来区分同一个ODN等级的不同的OLT接收机规范或PON上行方向的收发机规范(OLT接
收机规范+ONU发射机规范)。表2是本申请实施例提供的一种System_Profile消息格式的配置示意表。如表2所示,在第8字节配置了系统配置版本,用于指示采用不同的接入规范。
表2 System_Profile消息格式
接入PON系统的ONU会通过不断的配置学习,获取到ONU上行的Burst_Profile信息,ONU根据自身的收发规范以及发射功率的可变能力,通过Serial_Number_ONU对SN grant进行响应并提供ONU发送功率可变能力的指示。
如表3所示,例如,在Serial_Number_ONU消息中增加ONU的发射功率能力及调整情况的指示(字节为38),以及可选的增加ONU发射指标与当前OLT接收指标不匹配的指示(字节为40):
表3 Serial_number_ONU消息格式
相同ODN等级下的ONU接入PON系统,在对SN grant进行响应的阶段,要根据自身发射功率可变情况对上行发射功率进行初步调整,调整方法如下(无论是否调ONU上行的发射功率,此阶段上行FEC均采用默认码型):
(一)接入ONU的最小平均发射功率指标与OLT下行方向指示的ONU上行发射规范不符,可能的调整方法如下:
1)ONU的发射规范高于OLT指示的ONU发射能力,但ONU的发射机具备功率调整能力。这种情况下ONU发射的上行信号到达OLT侧可能导致OLT的接收机过载,因此ONU需要降低其发射功率以满足OLT的接收规范;调整功率后,对应于Serial_Number_ONU的第38字节前4个比特AA=10,BB=01。
AABB的含义如下:
AA表示ONU发射机发射功率的调整能力,其中:AA=00,表示当前ONU的发射基准无法调整;AA=01表示当前ONU的发射基准可以增加,以满足相
同ODN等级的更高发射功率指标;AA=10则表示当前ONU的发射基准可以衰减,以满足相同ODN等级的更低发射功率指标;BB表示ONU在响应SN grant阶段自身ONU发射功率的调整结果;其中:BB=00:发射基准未调整;BB=01,表示当前ONU的发射基准已降低;BB=10,表示当前ONU的发射基准已提高。
2)ONU的发射规范低于OLT指示的ONU发射能力,该情况下ONU发射的上行信号到达OLT侧可能导致OLT无法正确接收到该信号,因此ONU可能需要增大其发射功率以满足OLT的接收规范;AABB的含义同1),调整功率后,对应于Serial_Number_ONU的第38字节前4个比特AA=01,BB=10。
3)ONU的发射规范与OLT指示的ONU发射能力不符,并且ONU无法调整其发射光功率满足OLT指示的ONU发射能力,即便出现这种情况,ONU按照其自身发射规范发射的光信号,在OLT处接收到的光功率也有可能满足OLT接收机的动态范围要求;因此,尽管发射规范不一定满足要求,但OLT在接收侧仍能正常接收上行的ONU数据。此时,对应于Serial_Number_ONU的第38字节前4个比特AA=00,BB=00.
4)ONU的发射规范与OLT指示的ONU发射能力不符,并且ONU无法调整其发射光功率满足OLT指示的ONU发射能力,若ONU按照其自身发射规范继续发射光信号,则在OLT处接收到的光功率有可能导致OLT接收机过载或者无法正确的进行接收;此种情况同3)对应于Serial_Number_ONU的第38字节前4个比特AA=00,BB=00。
(二)接入ONU的最小平均发射功率指标与OLT下行方向指示的ONU上行发射规范相符,ONU按照正常发射功率发射;此种情况对应于Serial_Number_ONU的第38字节前4个比特AA=00,BB=00。
OLT对ONU的上行传输参数进一步进行配置。
当ONU完成对SN grant的响应后,OLT接收ONU上传的Serial_Number_ONU消息,不论ONU是否调整。
上行的发射光功率,在大部分情况下,OLT都能正常发现ONU的上线请求,并通过解析ONU上报的发射光功率调整能力获知当前接入ONU的情况。并进行后续配置。例如,通过解析Serial_Number_ONU的第40字节的Activation Debug information中DDDD取值是否为1110,OLT就可以知晓上线ONU的发射规范是否跟当前PON系统相符。以及第38字节前4个比特,OLT就可以知晓上线ONU的发射光功率是否支持调整,以及是否已经调整等。OLT发现ONU正常响应之后,后续激活注册过程跟G.9804.2相同。
但还有一种特殊情况,即ONU只能在自身发射规范下发射光功率,OLT要么接收到的光信号功率导致OLT接收机过载从而必须先经过power levelling衰
减3dB后再发送,要么导致OLT的BER不满足要求而无法正常接收。无论哪种情况,OLT将对无法正常接收的ONU重新下发SN grant,并在BWmap对应的Burst_Profile index指定新的ONU上行突发配置模板索引,ONU配置新的上行突发配置后,重新向OLT发送Serial_Number_ONU消息。新的Burst_Profile index对应的上行突发配置中会采用新的前向纠错编码FEC codeword,用以降低或者提高OLT接收机纠错后的误码率性能,从而使得OLT能够正常接收ONU发送的光信号。
以下是Burst_Profile消息中,新增的对不同FEC码型定义的示例(如6、7字节所述)。
表4突发配置消息格式
如果ONU不支持可选FEC,且无法上线激活,那么应将其归为由于ONU发射机规范(即上述实施例中的光网络终端的发射规范)与当前OLT接收机灵敏度规范(即上述实施例中的光局端设备的接入能力)不兼容而无法上线激活的ONU类型,并由运营商进行更换。
实施例一
ONU的发射规范与OLT的接收能力不匹配,且ONU的发射光功率可调时
的ONU工作流程,本实施例包括:ONU的发射规范高于OLT指示的ONU发射能力,以及ONU的发射规范低于OLT指示的OLT发射能力两种情况。包括如下操作:
S1,OLT以一定形式广播ONU上线所需的上行突发配置信息以及新上线ONU激活和注册所能进行响应的安静窗口,包括PSBd数据块OC body中的ODN等级(ODN class)/表2所示的系统配置(System_Profile)/表4所示的突发配置(Burst_Profile)/序列号授权(SN grant)等。
S2,ONU接入PON系统后,被动接收下行物理帧,并从PSBd中获取到该ONU上线激活必要的上行突发配置,并尝试与OLT进行时钟同步。
S3,ONU一旦同步之后,就需要根据OLT在下行数据中指示的OLT接收能力或ONU发射能力是否跟该ONU自身的发射规范匹配进行相应的发射光功率调整。
调整方法如下:
1)ONU的发射规范高于OLT指示的ONU发射能力,ONU降低其发射光功率,以满足OLT的接收能力或者OLT指示的ONU发射能力;2)ONU的发射规范低于OLT指示的ONU发射能力,ONU增大其发射光功率,以满足OLT的接收能力;当ONU完成发射光功率调整后,就需要在OLT指定的安静窗口向OLT发送Serial_Number_ONU响应消息;S4,OLT收到ONU发送的Serial_Number_ONU消息后,就会进一步通过Assign_ONU-ID给该新上线ONU分配ONU-ID和Alloc-ID等,并进行Power Levelling调整、OLT与ONU之间的测距、注册并进入工作状态等,这些操作与标准相同,此不赘述;可选的,在本实施例中,ONU还可以向OLT上报其发射功率的可调整能力(简称为发射功率调整能力),发射功率调整情况,以及自身的发射指示信息等信息;OLT在接收到此类信息后,也可以进一步对指派给该ONU的Burst_Profile进行更新。当然,ONU上报这些信息或者OLT更新该ONU的Burst_Profile也可以在该ONU进入正常工作状态之后再进行。本实施例中并不进行限定。
实施例二
ONU发射规范低于OLT接收能力,且ONU只能在自身发射规范下发射光功率时的ONU工作流程。
在ONU接入PON系统后,低发射规范的ONU直接向OLT发送上行数据,而且能够被OLT正常接收。在这种情况下,本实施例的ONU上线激活和注册过程与标准中规定的ONU上线激活和注册过程一致,此不赘述。
实施例三
ONU发射规范高于OLT接收能力,且ONU只能在自身发射规范下发射光功率时的ONU工作流程。包括如下操作:
S1,OLT以一定形式广播ONU上线所需的上行突发配置信息以及新上线ONU激活和注册所能进行响应的安静窗口,包括PSBd数据块OC body中的ODN等级(ODN class)/表2所示的系统配置(System_Profile)/表4所示的突发配置(Burst_Profile)/序列号授权(SN grant)等。
S2,ONU接入PON系统后,被动接收下行物理帧,并从PSBd中获取到该ONU上线激活必要的上行突发配置,并尝试与OLT进行时钟同步。
S3,ONU一旦同步之后,就自动进行3dB发射光功率的衰减,然后在OLT指定的安静窗口向OLT发送Serial_Number_ONU响应消息。
本实施例中,ONU虽然只能在自身发射规范下发射光功率,但是支持发射光功率衰减进行发射,例如支持标准中规定的Power Levelling功能,一旦该ONU支持此项功能,则可以在S3中,自动进行3dB发射光功率的衰减配置。
S4,OLT收到ONU发送的Serial_Number_ONU消息后,就会进一步通过Assign_ONU-ID给该新上线ONU分配ONU-ID、Alloc-ID等,并进行Power Levelling调整、OLT与ONU之间的测距、注册并进入工作状态等,这些操作与标准相同,此不赘述;可选的,在本实施例中,ONU还可以向OLT上报其发射光功率的可调整能力(简称为发射功率调整能力),发射功率调整情况,以及自身的发射指示信息等信息;OLT在接收到此类信息后,也可以进一步对指派给该ONU的Burst_Profile进行更新。当然,ONU上报这些信息或者OLT更新该ONU的Burst_Profile也可以在该ONU进入正常工作状态之后再进行。本实施例中并不进行限定。
实施例四
ONU发射规范低于OLT接收能力,且ONU只能在自身发射规范下发射光功率,但支持两种及以上FEC可切换上线时的ONU工作流程。
本实施例,针对在ONU接入PON系统后,低发射规范的ONU直接向OLT发送上行数据,但是不能被OLT正常接收,比如接收端输出的BER高于OLT接收机灵敏度规范对应的BER。包括如下操作:
S1,OLT以一定形式广播ONU上线所需的上行突发配置信息以及新上线ONU激活和注册所能进行响应的安静窗口,包括PSBd数据块OC body中的ODN等级(ODN class)/表2所示的系统配置(System_Profile)/表4所示的突发配置(Burst_Profile)/序列号授权(SN grant)等。
S2,ONU接入PON系统后,被动接收下行物理帧,并从PSBd中获取到该
ONU上线激活必要的上行突发配置,并尝试与OLT进行时钟同步。
S3,ONU一旦同步之后,直接在OLT指定的安静窗口向OLT发送Serial_Number_ONU响应消息。
S4,OLT接收到ONU发送的上行光信号,但是无法正常解析数据或者监控发现输出BER不满足系统正常工作的接收要求。OLT继续下发SN grant,并通知ONU使用新的前向纠错编码(FEC codeword)(比如,第一FEC码字)进行上行数据传输,该新的FEC codeword的编码增益要高于原来使用的FEC codeword。FEC codeword的通知方式包括:通过在BWmap中指定ONU上行配置采用新索引号的Burst_Profile,或者直接通过PLOAM消息指定上行采用的更高编码增益的前向纠错编码等。
S5,ONU根据OLT下发数据中告知的新FEC codeword重新设置ONU的上行传输配置,并通过在OLT指定的安静窗口向OLT发送Serial_Number_ONU响应消息。
S6,OLT收到ONU发送的Serial_Number_ONU消息后,就会进一步通过Assign_ONU-ID给该新上线ONU分配ONU-ID、Alloc-ID等,并进行Power Levelling调整、OLT与ONU之间的测距、注册并进入工作状态等,这些操作与标准相同,此不赘述。
可选的,在本实施例中S3和S5中ONU还可以向OLT上报其发射功率的可调整能力(简称为发射功率调整能力),发射功率调整情况,以及自身的发射指示信息等信息;OLT在接收到此类信息后,也可以进一步对指派给该ONU的Burst_Profile进行更新。当然,ONU上报这些信息或者OLT更新该ONU的Burst_Profile也可以在该ONU进入正常工作状态之后再进行。本实施例中并不进行限定。
实施例五
ONU发射规范高于OLT接收能力,且ONU只能在自身发射规范下发射光功率,但支持两种及以上FEC可切换上线时的ONU工作流程。包括如下操作:
S1,OLT以一定形式广播ONU上线所需的上行突发配置信息以及新上线ONU激活和注册所能进行响应的安静窗口,包括PSBd数据块OC body中的ODN等级(ODN class)/表2所示的系统配置(System_Profile)/表4所示的突发配置(Burst_Profile)/序列号授权(SN grant)等。
S2,ONU接入PON系统后,被动接收下行物理帧,并从PSBd中获取到该ONU上线激活必要的上行突发配置,并尝试与OLT进行时钟同步。
S3,ONU一旦同步之后,就自动进行3dB发射光功率的衰减,然后在OLT
指定的安静窗口向OLT发送Serial_Number_ONU响应消息。
本实施例中,ONU虽然只能在自身发射规范下发射光功率,但是支持发射机功率衰减进行发射,例如支持标准中规定的Power Levelling功能,一旦该ONU支持此项功能,则可以在Step.3中,自动进行3dB发射光功率的衰减配置。
S4,OLT接收到ONU发送的上行光信号,但是无法正常解析数据或者监控发现输出BER不满足系统正常工作的接收要求。OLT继续下发SN grant,并通知ONU使用新的前向纠错编码(FEC codeword)(比如,第一FEC码字)进行上行数据传输,该新的FEC codeword的编码增益要高于原来使用的FEC codeword。FEC codeword的通知方式包括:通过在BWmap中指定ONU上行配置采用新索引号的Burst_Profile,或者直接通过PLOAM消息指定上行采用的更高编码增益的前向纠错编码等。
S5,ONU根据OLT下发数据中告知的新FEC codeword重新设置ONU的上行传输配置,并通过在OLT指定的安静窗口向OLT发送Serial_Number_ONU响应消息。
S6,OLT收到ONU发送的Serial_Number_ONU消息后,就会进一步通过Assign_ONU-ID给该新上线ONU分配ONU-ID、Alloc-ID等,并进行Power Levelling调整、OLT与ONU之间的测距、注册并进入工作状态等,这些操作与标准相同,此不赘述。
可选的,在本实施例中,S3和S5中ONU还可以向OLT上报其发射功率的可调整能力(简称为发射功率调整能力),发射功率调整情况,以及自身的发射指示信息等信息;OLT在接收到此类信息后,也可以进一步对指派给该ONU的Burst_Profile进行更新。当然,ONU上报这些信息或者OLT更新该ONU的Burst_Profile也可以在该ONU进入正常工作状态之后再进行。本实施例中并不进行限定。
本申请中,其他ONU发射规范与OLT接收能力不匹配,且ONU不能上线激活和注册的情况,直接OLT报错处理。
在一实施例中,图7是本申请实施例提供的一种通信装置的结构框图。本实施例应用于光局端设备和光网络终端设备。如图7所示,本实施例中的通信装置包括:发送器710和确定模块720。
发送器710,配置为光局端设备向光网络终端设备发送接入能力。
确定模块720,配置为光网络终端设备按照接入能力确定发射参数。
在一实施例中,发射参数至少包括下述之一:发射光功率;前向纠错编码。
在一实施例中,接入能力至少包括下述之一:光局端设备的接收能力;光
网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
在一实施例中,光局端设备的接收能力包括:接收机灵敏度;光网络终端设备的发射能力包括:平均发射光功率;光分配网络ODN等级至少包括下述之一:不同光链路损耗范围对应的ODN等级、同一个光链路损耗范围对应不同接收机灵敏度的ODN等级、同一个光链路损耗范围对应不同平均发射光功率的ODN等级;前向纠错编码包括:至少两个不同的前向纠错编码。
在一实施例中,接收机灵敏度至少包括下述之一:给定误码率BER下的灵敏度、给定误码率BER下的OMA灵敏度;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,接入能力的发送方式至少包括下述之一:广播发送接入能力;多播发送接入能力;单播发送接入能力。
在一实施例中,接入能力包括以下任意之一:指示接入能力的数值、指示接入能力的标识。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;光网络终端设备按照接入能力确定发射参数,包括下述之一:
若光网络终端设备的发射规范高于接入能力,光网络终端设备降低其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备增大其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备按自身发射规范发射光功率。
在一实施例中,光网络终端设备的发射规范包括:平均发射光功率;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作。
在一实施例中,发射参数包括:光网络终端设备的前向纠错编码;若光网络终端设备的发射规范低于光局端设备的接收能力,光网络终端设备按照接入能力确定发射参数,包括以下之一:
光网络终端设备从默认FEC码字切换至第一FEC码字,其中,第一FEC码字的编码增益大于默认FEC码字的编码增益;光网络终端设备使用第一高增益FEC码字,其中,第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
在一实施例中,发射参数包括:光网络终端设备的发射光功率和前向纠错编码;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作;若光网络终端设备发送至光局端设备的光信号功率不满足光局端设备的接收能力,光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益。
在一实施例中,第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定光网络终端设备采用比默认FEC码字更高编码增益的第一FEC码字。
在一实施例中,通信方法,还包括:光局端设备接收光网络终端设备上报的发射功率调整能力、发射功率调整情况和发射指示信息。
在一实施例中,发射功率调整能力和发射功率调整情况采用序列号消息承载。
在一实施例中,通信方法,还包括:光局端设备接收光网络终端设备按照发射参数在预先配置的安静窗口内发送的序列号授权的响应消息。
本实施例提供的通信装置设置为实现图3所示实施例的应用于光局端设备和光网络终端设备的通信方法,本实施例提供的通信装置实现原理和技术效果类似,此处不再赘述。
在一实施例中,图8是本申请实施例提供的另一种通信装置的结构框图。本实施例应用于光局端设备。如图8所示,本实施例中的通信装置包括:发送器810。
发送器810,配置为向光网络终端设备发送接入能力,以使光网络终端设备按照接入能力确定发射参数。
在一实施例中,发射参数至少包括下述之一:发射光功率;前向纠错编码。
在一实施例中,接入能力至少包括下述之一:光局端设备的接收能力;光网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
在一实施例中,光局端设备的接收能力包括:接收机灵敏度;光网络终端设备的发射能力包括:平均发射光功率;光分配网络ODN等级至少包括下述之一:不同光链路损耗范围对应的ODN等级、同一个光链路损耗范围对应不同接收机灵敏度的ODN等级、同一个光链路损耗范围对应不同平均发射光功率的ODN等级;前向纠错编码包括:至少两个不同的前向纠错编码。
在一实施例中,接收机灵敏度至少包括下述之一:给定误码率BER下的灵敏度、给定误码率BER下的OMA灵敏度;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,接入能力的发送方式至少包括下述之一:广播发送接入能力;多播发送接入能力;单播发送接入能力。
在一实施例中,接入能力包括以下任意之一:指示接入能力的数值、指示接入能力的标识。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;光网络终端设备按照接入能力确定发射参数,包括下述之一:
若光网络终端设备的发射规范高于接入能力,光网络终端设备降低其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备增大其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备按自身发射规范发射光功率。
在一实施例中,光网络终端设备的发射规范包括:平均发射光功率;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作。
在一实施例中,发射参数包括:光网络终端设备的前向纠错编码;若光网络终端设备的发射规范低于光局端设备的接收能力,光网络终端设备按照接入能力确定发射参数,包括下述之一:
光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益;光网络终端设备使用第一高增益FEC码字,其中,第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
在一实施例中,发射参数包括:光网络终端设备的发射光功率和前向纠错编码;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,光网络终端设备按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作;若光网络终端设备发送至光局端设备的光信号功率不满足光局端设备的接收能力,光网络终端设备
从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益。
在一实施例中,第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定光网络终端设备采用比默认FEC码字更高编码增益的第一FEC码字。
在一实施例中,应用于光局端设备的通信装置,还包括:
接收器,配置为接收光网络终端设备上报的发射功率调整能力、发射功率调整情况和发射指示信息。
在一实施例中,应用于光局端设备的通信装置,还包括:
接收器,还配置为接收光网络终端设备按照发射参数在预先配置的安静窗口内发送的序列号授权的响应消息。
本实施例提供的通信装置设置为实现图4所示实施例的应用于光局端设备的通信方法,本实施例提供的通信装置实现原理和技术效果类似,此处不再赘述。
在一实施例中,图9是本申请实施例提供的又一种通信装置的结构框图。本实施例应用于光网络终端设备。如图9所示,本实施例中的通信装置包括:接收器910和确定模块920。
接收器910,配置为接收光局端设备发送的接入能力。
确定模块920,配置为按照接入能力确定发射参数。
在一实施例中,发射参数至少包括下述之一:发射光功率;前向纠错编码。
在一实施例中,接入能力至少包括下述之一:光局端设备的接收能力;光网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
在一实施例中,光局端设备的接收能力包括:接收机灵敏度;光网络终端设备的发射能力包括:平均发射光功率;光分配网络ODN等级至少包括下述之一:不同光链路损耗范围对应的ODN等级、同一个光链路损耗范围对应不同接收机灵敏度的ODN等级、同一个光链路损耗范围对应不同平均发射光功率的ODN等级;前向纠错编码包括:至少两个不同的前向纠错编码。
在一实施例中,接收机灵敏度至少包括下述之一:给定误码率BER下的灵敏度、给定误码率BER下的OMA灵敏度;平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,接入能力的发送方式至少包括下述之一:广播发送接入能力;多播发送接入能力;单播发送接入能力。
在一实施例中,接入能力包括以下任意之一:指示接入能力的数值、指示接入能力的标识。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;按照接入能力确定发射参数,包括下述之一:
若光网络终端设备的发射规范高于接入能力,光网络终端设备降低其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备增大其发射光功率,以满足接入能力;若光网络终端设备的发射规范低于接入能力,光网络终端设备按自身发射规范发射光功率。
在一实施例中,光网络终端设备的发射规范包括:平均发射光功率;所述平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
在一实施例中,发射参数包括:光网络终端设备的发射光功率;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作。
在一实施例中,发射参数包括:光网络终端设备的前向纠错编码;若光网络终端设备的发射规范低于光局端设备的接收能力,按照接入能力确定发射参数,包括下述之一:
光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益;光网络终端设备使用第一高增益FEC码字,其中,第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
在一实施例中,发射参数包括:光网络终端设备的发射光功率和前向纠错编码;若光网络终端设备的发射规范高于光局端设备的接收能力,且光网络终端设备只能在自身发射规范下发射光功率,按照接入能力确定发射参数,包括:
光网络终端设备自动进行第一预设功率的衰减操作;若光网络终端设备发送至光局端设备的光信号功率不满足光局端设备的接收能力,光网络终端设备从默认FEC码字切换至第一FEC码字;其中,第一FEC码字的编码增益大于默认FEC码字的编码增益。
在一实施例中,第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定光网络终端设备采用比默认FEC码字更高编码增益的第一FEC码字。
在一实施例中,应用于光网络终端设备的通信装置,还包括:
上报模块,配置为向光局端设备上报发射功率调整能力、发射功率调整情况和发射指示信息。
在一实施例中,应用于光网络终端设备的通信装置,还包括:
发送器,配置为按照发射参数在预先配置的安静窗口内向光局端设备发送序列号授权的响应消息。
本实施例提供的通信装置设置为实现图5所示实施例的应用于光网络终端设备的通信方法,本实施例提供的通信装置实现原理和技术效果类似,此处不再赘述。
在一实施例中,图10是本申请实施例提供的一种通信设备的结构示意图。如图10所示,本申请提供的设备,包括:处理器1010、存储器1020和通信模块1030。该设备中处理器1010的数量可以是一个或者多个,图10中以一个处理器1010为例。该设备中存储器1020的数量可以是一个或者多个,图10中以一个存储器1020为例。该设备的处理器1010、存储器1020和通信模块1030可以通过总线或者其他方式连接,图10中以通过总线连接为例。在该实施例中,该设备为可以为光局端设备或光网络终端设备。
存储器1020作为一种计算机可读存储介质,可设置为存储软件程序、计算机可执行程序以及模块,如本申请任意实施例的设备对应的程序指令/模块(例如,通信装置中的发送器710和确定模块720)。存储器1020可包括存储程序区和存储数据区,其中,存储程序区可存储操作系统、至少一个功能所需的应用程序;存储数据区可存储根据设备的使用所创建的数据等。此外,存储器1020可以包括高速随机存取存储器,还可以包括非易失性存储器,例如至少一个磁盘存储器件、闪存器件、或其他非易失性固态存储器件。在一些实例中,存储器1020可进一步包括相对于处理器1010远程设置的存储器,这些远程存储器可以通过网络连接至设备。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
在通信设备为光局端设备的情况下,上述提供的设备可设置为执行上述任意实施例提供的应用于光局端设备的通信方法,具备相应的功能和效果。
在通信设备为光网络终端设备的情况下,上述提供的设备可设置为执行上述任意实施例提供的应用于光网络终端设备的通信方法,具备相应的功能和效果。
本申请实施例还提供一种包含计算机可执行指令的存储介质,计算机可执行指令在由计算机处理器执行时用于执行一种通信方法,在光局端设备分配光网络终端设备标识之前,该方法包括:光局端设备向光网络终端设备发送接入能力;光网络终端设备按照接入能力确定发射参数。
本申请实施例还提供一种包含计算机可执行指令的存储介质,计算机可执行指令在由计算机处理器执行时用于执行一种应用于光局端设备的通信方法,在光局端设备分配光网络终端设备标识之前,该方法包括:向光网络终端设备发送接入能力,以使光网络终端设备按照接入能力确定发射参数。
本申请实施例还提供一种包含计算机可执行指令的存储介质,计算机可执行指令在由计算机处理器执行时用于执行一种应用于光网络终端设备的通信方法,在光局端设备向光网络终端设备分配光网络终端设备标识之前,该方法包括:接收光局端设备发送的接入能力;按照接入能力确定发射参数。
本领域内的技术人员应明白,术语用户设备涵盖任何适合类型的无线用户设备,例如移动电话、便携数据处理装置、便携网络浏览器或车载移动台。
一般来说,本申请的多种实施例可以在硬件或专用电路、软件、逻辑或其任何组合中实现。例如,一些方面可以被实现在硬件中,而其它方面可以被实现在可以被控制器、微处理器或其它计算装置执行的固件或软件中,尽管本申请不限于此。
本申请的实施例可以通过移动装置的数据处理器执行计算机程序指令来实现,例如在处理器实体中,或者通过硬件,或者通过软件和硬件的组合。计算机程序指令可以是汇编指令、指令集架构(Instruction Set Architecture,ISA)指令、机器指令、机器相关指令、微代码、固件指令、状态设置数据、或者以一种或多种编程语言的任意组合编写的源代码或目标代码。
本申请附图中的任何逻辑流程的框图可以表示程序操作,或者可以表示相互连接的逻辑电路、模块和功能,或者可以表示程序操作与逻辑电路、模块和功能的组合。计算机程序可以存储在存储器上。存储器可以具有任何适合于本地技术环境的类型并且可以使用任何适合的数据存储技术实现,例如但不限于只读存储器(Read-Only Memory,ROM)、随机访问存储器(Random Access Memory,RAM)、光存储器装置和系统(数码多功能光碟(Digital Video Disc,DVD)或光盘(Compact Disk,CD))等。计算机可读介质可以包括非瞬时性存储介质。数据处理器可以是任何适合于本地技术环境的类型,例如但不限于通用计算机、专用计算机、微处理器、数字信号处理器(Digital Signal Processing,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、可编程逻辑器件(Field-Programmable Gate Array,FPGA)以及基于多核处理器架构的处理器。
Claims (38)
- 一种通信方法,在光局端设备分配光网络终端设备的标识之前,包括:所述光局端设备向所述光网络终端设备发送接入能力;所述光网络终端设备按照所述接入能力确定发射参数。
- 根据权利要求1所述的方法,其中,所述发射参数至少包括下述之一:发射光功率;前向纠错编码。
- 根据权利要求1所述的方法,其中,所述接入能力至少包括下述之一:所述光局端设备的接收能力;所述光网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
- 根据权利要求3所述的方法,其中,所述光局端设备的接收能力包括:接收机灵敏度;所述光网络终端设备的发射能力包括:平均发射光功率;所述ODN等级至少包括下述之一:不同光链路损耗范围对应的ODN等级、同一个光链路损耗范围对应不同接收机灵敏度的ODN等级、同一个光链路损耗范围对应不同平均发射光功率的ODN等级;所述前向纠错编码包括:至少两个不同的前向纠错编码。
- 根据权利要求4所述的方法,其中,所述接收机灵敏度至少包括下述之一:给定误码率BER下的灵敏度、给定BER下的光调制幅度OMA灵敏度;所述平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-传输色散眼图闭合TDEC发射功率、最小OMA发射功率。
- 根据权利要求1所述的方法,其中,所述接入能力的发送方式至少包括下述之一:广播发送接入能力;多播发送接入能力;单播发送接入能力。
- 根据权利要求1所述的方法,其中,所述接入能力包括以下之一:指示接入能力的数值、指示接入能力的标识。
- 根据权利要求1所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率;所述光网络终端设备按照所述接入能力确定发射参数,包括下述之一:响应于所述光网络终端设备的发射规范高于所述接入能力,所述光网络终端设备降低所述所述光网络终端设备的发射光功率,以满足所述接入能力;响应于所述光网络终端设备的发射规范低于所述接入能力,所述光网络终端设备增大所述所述光网络终端设备的发射光功率,以满足所述接入能力;响应于所述光网络终端设备的发射规范低于所述接入能力,所述光网络终 端设备按自身发射规范发射光功率。
- 根据权利要求8所述的方法,其中,所述光网络终端设备的发射规范包括:平均发射光功率;所述平均发射光功率至少包括下述之一:最小平均发射功率、最小OMA-TDEC发射功率、最小OMA发射功率。
- 根据权利要求1所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率;响应于所述光网络终端设备的发射规范高于所述光局端设备的接收能力,且所述光网络终端设备只能在自身发射规范下发射光功率,所述光网络终端设备按照所述接入能力确定发射参数,包括:所述光网络终端设备自动进行第一预设功率的衰减操作。
- 根据权利要求1所述的方法,其中,所述发射参数包括:所述光网络终端设备的前向纠错编码;响应于所述光网络终端设备的发射规范低于所述光局端设备的接收能力,所述光网络终端设备按照所述接入能力确定发射参数,包括以下之一:所述光网络终端设备从默认前向纠错FEC码字切换至第一FEC码字,其中,所述第一FEC码字的编码增益大于所述默认FEC码字的编码增益;所述光网络终端设备使用第一高增益FEC码字,其中,所述第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
- 根据权利要求1所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率和前向纠错编码;响应于所述光网络终端设备的发射规范高于所述光局端设备的接收能力,且所述光网络终端设备只能在自身发射规范下发射光功率,所述光网络终端设备按照所述接入能力确定发射参数,包括:所述光网络终端设备自动进行第一预设功率的衰减操作;响应于所述光网络终端设备发送至所述光局端设备的光信号功率不满足所述光局端设备的接收能力,所述光网络终端设备从默认FEC码字切换至第一FEC码字;其中,所述第一FEC码字的编码增益大于所述默认FEC码字的编码增益。
- 根据权利要求11或12所述的方法,其中,所述第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定所述光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定所述光网络终端设备采用比所述默认FEC码字更高编码增益的第一FEC码字。
- 根据权利要求1-12任一项所述的方法,还包括:所述光局端设备接收所述光网络终端设备上报的发射功率调整能力、发射功率调整情况和发射指示信息。
- 根据权利要求14所述的方法,其中,所述发射功率调整能力和所述发射功率调整情况采用序列号消息承载。
- 根据权利要求1-12任一项所述的方法,还包括:所述光局端设备接收所述光网络终端设备按照所述发射参数在预先配置的安静窗口内发送的序列号授权的响应消息。
- 一种通信方法,应用于光局端设备,在所述光局端设备分配光网络终端设备的标识之前,包括:向所述光网络终端设备发送接入能力,以使所述光网络终端设备按照所述接入能力确定发射参数。
- 根据权利要求17所述的方法,其中,所述发射参数至少包括下述之一:发射光功率;前向纠错编码。
- 根据权利要求17所述的方法,其中,所述接入能力至少包括下述之一:光局端设备的接收能力;光网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
- 根据权利要求17所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率;所述光网络终端设备按照所述接入能力确定发射参数,包括下述之一:响应于所述光网络终端设备的发射规范高于所述接入能力,所述光网络终端设备降低所述所述光网络终端设备的发射光功率,以满足所述接入能力;响应于所述光网络终端设备的发射规范低于所述接入能力,所述光网络终端设备增大所述所述光网络终端设备的发射光功率,以满足所述接入能力;响应于所述光网络终端设备的发射规范低于所述接入能力,所述光网络终端设备按自身发射规范发射光功率。
- 根据权利要求17所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率;响应于所述光网络终端设备的发射规范高于所述光局端设备的接收能力,且所述光网络终端设备只能在自身发射规范下发射光功率,所述光网络终端设备按照所述接入能力确定发射参数,包括:所述光网络终端设备自动进行第一预设功率的衰减操作。
- 根据权利要求17所述的方法,其中,所述发射参数包括:所述光网络 终端设备的前向纠错编码;响应于所述光网络终端设备的发射规范低于所述光局端设备的接收能力,所述光网络终端设备按照所述接入能力确定发射参数,包括下述之一:所述光网络终端设备从默认前向纠错FEC码字切换至第一FEC码字;其中,所述第一FEC码字的编码增益大于所述默认FEC码字的编码增益;所述光网络终端设备使用第一高增益FEC码字,其中,所述第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
- 根据权利要求17所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率和前向纠错编码;响应于所述光网络终端设备的发射规范高于所述光局端设备的接收能力,且所述光网络终端设备只能在自身发射规范下发射光功率,所述光网络终端设备按照所述接入能力确定发射参数,包括:所述光网络终端设备自动进行第一预设功率的衰减操作;响应于所述光网络终端设备发送至所述光局端设备的光信号功率不满足所述光局端设备的接收能力,所述光网络终端设备从默认FEC码字切换至第一FEC码字;其中,所述第一FEC码字的编码增益大于所述默认FEC码字的编码增益。
- 根据权利要求22或23所述的方法,其中,所述第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定所述光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定所述光网络终端设备采用比所述默认FEC码字更高编码增益的第一FEC码字。
- 根据权利要求17-23任一项所述的方法,还包括:接收所述光网络终端设备上报的发射功率调整能力、发射功率调整情况和发射指示信息。
- 根据权利要求17-23任一项所述的方法,还包括:接收所述光网络终端设备按照所述发射参数在预先配置的安静窗口内发送的序列号授权的响应消息。
- 一种通信方法,应用于光网络终端设备,在光局端设备向所述光网络终端设备分配所述光网络终端设备的标识之前,包括:接收所述光局端设备发送的接入能力;按照所述接入能力确定发射参数。
- 根据权利要求27所述的方法,其中,所述发射参数至少包括下述之一: 发射光功率;前向纠错编码。
- 根据权利要求27所述的方法,其中,所述接入能力至少包括下述之一:光局端设备的接收能力;光网络终端设备的发射能力;光分配网络ODN等级;前向纠错编码。
- 根据权利要求27所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射功光率;所述按照所述接入能力确定发射参数,包括下述之一:响应于所述光网络终端设备的发射规范高于所述接入能力,所述光网络终端设备降低所述所述光网络终端设备的发射光功率,以满足所述接入能力;响应于所述光网络终端设备的发射规范低于所述接入能力,所述光网络终端设备增大所述所述光网络终端设备的发射光功率,以满足所述接入能力;响应于所述光网络终端设备的发射规范低于所述接入能力,所述光网络终端设备按自身发射规范发射光功率。
- 根据权利要求27所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率;响应于所述光网络终端设备的发射规范高于所述光局端设备的接收能力,且所述光网络终端设备只能在自身发射规范下发射光功率,所述按照所述接入能力确定发射参数,包括:所述光网络终端设备自动进行第一预设功率的衰减操作。
- 根据权利要求27所述的方法,其中,所述发射参数包括:所述光网络终端设备的前向纠错编码;响应于所述光网络终端设备的发射规范低于所述光局端设备的接收能力,所述按照所述接入能力确定发射参数,包括下述之一:所述光网络终端设备从默认前向纠错FEC码字切换至第一FEC码字;其中,所述第一FEC码字的编码增益大于所述默认FEC码字的编码增益;所述光网络终端设备使用第一高增益FEC码字,其中,所述第一高增益FEC码字的编码增益大于其它FEC码字的编码增益。
- 根据权利要求27所述的方法,其中,所述发射参数包括:所述光网络终端设备的发射光功率和前向纠错编码;响应于所述光网络终端设备的发射规范高于所述光局端设备的接收能力,且所述光网络终端设备只能在自身发射规范下发射光功率,所述按照所述接入能力确定发射参数,包括:所述光网络终端设备自动进行第一预设功率的衰减操作;响应于所述光网络终端设备发送至所述光局端设备的光信号功率不满足所述光局端设备的接收能力,所述光网络终端设备从默认FEC码字切换至第一 FEC码字;其中,所述第一FEC码字的编码增益大于所述默认FEC码字的编码增益。
- 根据权利要求32或33所述的方法,其中,所述第一FEC码字的通知方式包括下述之一:在带宽分配映射表中指定所述光网络终端设备采用新索引号的突发配置信息;通过第一管理消息指定所述光网络终端设备采用比所述默认FEC码字更高编码增益的第一FEC码字。
- 根据权利要求27-33任一项所述的方法,还包括:向所述光局端设备上报发射功率调整能力、发射功率调整情况和发射指示信息。
- 根据权利要求27-33任一项所述的方法,还包括:按照所述发射参数在预先配置的安静窗口内向所述光局端设备发送序列号授权的响应消息。
- 一种通信设备,包括:存储器,以及至少一个处理器;所述存储器,配置为存储至少一个程序;当所述至少一个程序被所述至少一个处理器执行,使得所述至少一个处理器实现如上述权利要求1-16、17-26或27-36任一项所述的通信方法。
- 一种存储介质,所述存储介质存储有计算机程序,所述计算机程序被处理器执行时实现如上述权利要求1-16、17-26或27-36中任一项所述的通信方法。
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