WO2018112981A1 - 数据通信系统、光线路终端及基带单元 - Google Patents

数据通信系统、光线路终端及基带单元 Download PDF

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Publication number
WO2018112981A1
WO2018112981A1 PCT/CN2016/111931 CN2016111931W WO2018112981A1 WO 2018112981 A1 WO2018112981 A1 WO 2018112981A1 CN 2016111931 W CN2016111931 W CN 2016111931W WO 2018112981 A1 WO2018112981 A1 WO 2018112981A1
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Prior art keywords
onu
registration
bbu
olt
onu registration
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PCT/CN2016/111931
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English (en)
French (fr)
Inventor
殷锦蓉
赵殿博
郑刚
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/111931 priority Critical patent/WO2018112981A1/zh
Priority to JP2019534643A priority patent/JP6900624B2/ja
Priority to EP16924638.6A priority patent/EP3550739B1/en
Priority to CN201680091644.3A priority patent/CN110073613B/zh
Publication of WO2018112981A1 publication Critical patent/WO2018112981A1/zh

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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
    • 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
    • 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
    • H04B10/27—Arrangements for networking
    • 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
    • H04Q2011/0064—Arbitration, scheduling or medium access control aspects

Definitions

  • the present application relates to the field of optical communications, and in particular, to a data communication system, an optical line terminal (OLT), and a baseband unit (BBU).
  • OLT optical line terminal
  • BBU baseband unit
  • a passive optical network is a point-to-multipoint network topology. It usually includes an optical line terminal (OLT) at the central office and multiple optical network units at the user end. Network Unit (ONU) and an Optical Distribution Network (ODN) located between the two.
  • OLT optical line terminal
  • ONU Network Unit
  • ODN Optical Distribution Network
  • the newly added ONU needs to complete the registration at the OLT before sending the uplink service data to the OLT through the uplink channel.
  • the OLT receives the registration response message sent by the new ONU through the uplink channel by means of a silent window, so as to access the media according to the registration response message.
  • the control Media Access Control, MAC address
  • LLID Logical Link IDentifier
  • the OLT receives the registration response message sent by the newly added ONU by means of a silent window, so that the serial number carried in the registration response message (Serial Number) , SN) allocates the ONU ID, and further completes the ranging of the newly added ONU, thereby implementing registration of the newly added ONU in the GPON system.
  • Serial Number Serial Number
  • the registered ONUs use the Time Division Multiple Access (TDMA) to send uplink service data to the OLT through the uplink channel according to the uplink transmission time slot allocated by the OLT, so as to avoid uplink services sent by different ONUs.
  • TDMA Time Division Multiple Access
  • the data creates a collision on the upstream channel.
  • the OLT will stop performing bandwidth authorization for the registered ONU, that is, the registered ONU will stop sending uplink service data. .
  • a registered ONU needs to send uplink service data after the end of the silent window.
  • the time requirement for example, the application of the PON system to the mobile bearer, the interface between the baseband unit (BBU) and the remote radio unit (RRU) requires a delay of less than 100 us, due to the PON system.
  • the OLT completes the registration of the new ONU.
  • the silent window is usually between 200 and 250 us. At this time, all registered ONUs can only wait for 200 to 250 us before normal data communication can occur. This will result in a mobile bearer scenario. The delay is not sufficient to meet the performance requirements of 100us delay required for service transmission.
  • the uplink service data is sent with a large delay, which cannot meet the delay requirement of the delay sensitive service.
  • a first design provides a registration method for a mobile bearer system, the method comprising:
  • the optical line terminal OLT sends an optical network unit ONU registration request message to the baseband unit BBU;
  • the OLT After receiving the response message of the BBU, the OLT starts registration of the ONU.
  • the registration request includes: a silent window size required for ONU registration.
  • the response message of the BBU includes: an ONU registration response identifier determined by the BBU.
  • the method further includes:
  • the OLT sends an ONU registration completion message to the BBU.
  • the OLT sends an ONU registration request message to the baseband unit BBU.
  • the BBU pauses to allocate bandwidth resources to the user equipment UE.
  • the OLT starts the location.
  • the registration of the ONU ensures that the UE suspends the uplink service during the ONU registration, and no uplink data arrives at the RRU and the ONU, so that the data cannot be sent to the BBU in time due to the ONU registration, and the delay exceeds the requirement of the interface between the BBU and the RRU.
  • the problem of the impact of the ONU registration on the delay-sensitive service is solved, so that the PON system is applied to the mobile bearer system, which can still meet the requirements of service transmission and improve user satisfaction.
  • another registration method is provided, which is applied to a network side device of a mobile bearer system, where the network side device includes: a baseband unit BBU and an optical line terminal connected to the BBU.
  • the method includes: the BBU receives the registration request message sent by the OLT; and the BBU pauses to allocate the bandwidth resource to the user equipment according to the registration request message.
  • the registration request message includes: a silence window size required for ONU registration.
  • the method further includes:
  • the method further includes:
  • the BBU sends an ONU registration response identifier determined by the BBU to the OLT.
  • the ONU registration response identifier is used to mark whether the OLT can perform ONU registration after receiving the ONU registration response message.
  • the OLT sends an ONU registration request message to the baseband unit BBU.
  • the BBU pauses to allocate bandwidth resources to the user equipment UE.
  • the OLT starts the location.
  • the registration of the ONU ensures that the UE suspends the uplink service during the ONU registration, and no uplink data arrives at the RRU and the ONU, so that the data cannot be sent to the BBU in time due to the ONU registration, and the delay exceeds the requirement of the interface between the BBU and the RRU.
  • the problem of the impact of the ONU registration on the delay-sensitive service is solved, so that the PON system is applied to the mobile bearer system, which can still meet the requirements of service transmission and improve user satisfaction.
  • a registration method for a mobile bearer system, the method comprising:
  • the optical line terminal OLT receives the subframe ratio information sent by the baseband unit BBU; the OLT calculates a time slot for the ONU registration of the optical network unit according to the received subframe ratio information; the OLT calculates the time according to the The gap starts the registration of the ONU.
  • the OLT calculates the time slot used for the ONU registration according to the received subframe ratio information, and specifically includes:
  • the OLT calculates a time slot corresponding to the ratio information of the downlink subframe in the subframe matching information
  • the OLT selects the calculated time slot as a time slot for ONU registration.
  • the OLT calculates the ONU registration for the optical network unit according to the received subframe ratio information and the monitored downlink and/or uplink data distribution information through the subframe ratio information provided by the baseband unit BBU.
  • Time slot avoiding the impact of ONU registration on delay sensitive services
  • the ONU is registered by using the transmission time slot of the downlink subframe in the subframe matching information of the BBU, and the transmission rate of the uplink service data is improved, and the registered ONU needs to be sent after the silence window ends.
  • the data causes a large delay in the transmission of uplink service data, which cannot meet the problem of delay-sensitive service demand for system delay.
  • a registration method is provided, which is applied to a network side device of a mobile bearer system, where the network side device includes: a cloud controller, a baseband unit BBU, and an optical line terminal OLT connected to the BBU.
  • the method includes:
  • the cloud controller determines a registration start time of the ONU; the cloud controller instructs the BBU to suspend allocation of bandwidth resources to the user equipment according to the ONU registration start time.
  • the determining, by the cloud controller, the registration start time of the ONU specifically includes:
  • the cloud controller receives an instruction to initiate ONU registration, and the instruction for starting the ONU registration includes: an ONU registration period and a silence window size required for ONU registration; and an ONU registration period and a usage according to the ONU registration instruction.
  • the required quiet window size is registered with the ONU to determine the registration start time of the ONU.
  • the cloud controller uniformly implements resource allocation and scheduling of the OLT and the BBU, and avoids the impact of the ONU registration on the delay-sensitive service, improves the transmission rate of the uplink service data, and solves the problem that the registered ONU needs to be After the quiet window is closed, the uplink service data can be sent. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay sensitive service.
  • a network side device where the network side device includes:
  • a transceiver configured to send an optical network unit ONU registration request message to the baseband unit BBU; and receive a response message of the BBU;
  • a processor configured to start registration of the ONU after the transceiver receives the response message of the BBU.
  • the OLT sends an ONU registration request message to the baseband unit BBU.
  • the BBU pauses to allocate bandwidth resources to the user equipment UE.
  • the OLT starts the location.
  • the registration of the ONU ensures that the UE suspends the uplink service during the ONU registration, and no uplink data arrives at the RRU and the ONU, so that the data cannot be sent to the BBU in time due to the ONU registration, and the delay exceeds the requirement of the interface between the BBU and the RRU.
  • the problem of the impact of the ONU registration on the delay-sensitive service is further solved, so that the PON system is applied to the mobile bearer system, and the service transmission requirement can still be met, and the user satisfaction is improved.
  • the registration request includes: a silent window size required for ONU registration.
  • the response message of the BBU includes: an ONU registration response identifier determined by the BBU.
  • the transceiver is further configured to send an ONU registration completion message to the BBU.
  • a network side device where the network side device includes:
  • a transceiver configured to receive a registration request message sent by the OLT
  • a controller configured to suspend allocation of bandwidth resources to the user equipment according to the registration request message.
  • the OLT sends an ONU registration request message to the baseband unit BBU.
  • the BBU pauses to allocate bandwidth resources to the user equipment UE.
  • the OLT starts the location.
  • the registration of the ONU ensures that the UE suspends the uplink service during the ONU registration, and no uplink data arrives at the RRU and the ONU, so that the data cannot be sent to the BBU in time due to the ONU registration, and the delay exceeds the requirement of the interface between the BBU and the RRU.
  • the problem of the impact of the ONU registration on the delay-sensitive service is solved, so that the PON system is applied to the mobile bearer system, which can still meet the requirements of service transmission and improve user satisfaction.
  • the registration request message includes: a silence window size required for ONU registration.
  • the controller is further configured to determine a registration start time of the ONU according to a size of a silence window required for ONU registration;
  • the transceiver is further configured to send the determined ONU registration start time to the OLT.
  • the transceiver is further configured to send an ONU registration response identifier determined by the BBU to the OLT, where the ONU registration response identifier is used to mark whether the OLT can perform ONU registration after receiving the ONU registration response message.
  • a network side device where the network side device includes:
  • a transceiver configured to receive subframe ratio information sent by the baseband unit BBU;
  • a controller configured to calculate an ONU note for the optical network unit according to the received subframe ratio information The time slot of the book; the registration of the ONU is initiated according to the calculated time slot.
  • the OLT calculates the ONU registration for the optical network unit according to the received subframe ratio information and the monitored downlink and/or uplink data distribution information through the subframe ratio information provided by the baseband unit BBU.
  • the time slot avoids the influence of the ONU registration on the delay-sensitive service, and uses the transmission time slot of the downlink subframe in the subframe matching information of the BBU to register the ONU, thereby improving the transmission rate of the uplink service data.
  • the problem is that the registered ONU needs to send the uplink service data after the end of the silent window. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay sensitive service.
  • the controller is specifically configured to calculate a time slot corresponding to the matching information of the downlink subframe in the subframe matching information, and select the calculated time slot as a time slot for ONU registration.
  • the eighth design provides a network side device, where the network side device includes:
  • a calculating unit configured to determine a registration start time of the ONU
  • the processing unit is configured to suspend allocation of bandwidth resources to the user equipment according to the registration start time of the ONU.
  • the network device uniformly implements resource allocation and scheduling of the OLT and the BBU, and avoids the impact of the ONU registration on the delay-sensitive service, and improves the transmission rate of the uplink service data, and solves the problem that the registered ONU needs to be After the quiet window is closed, the uplink service data can be sent. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay sensitive service.
  • the eighth computing unit is specifically configured to receive an instruction for starting ONU registration, where the instruction for starting the ONU registration includes: an ONU registration period and a size of a silent window required for ONU registration; according to the registration instruction of the ONU The ONU registration period and the size of the silent window required for ONU registration determine the registration start time of the ONU.
  • a data communication system comprising: a baseband unit BBU and a radio remote unit RRU, an optical line terminal OLT connected to the BBU, and an optical network unit connected to the RRU
  • An ONU the OLT is connected to each of the ONUs through an optical distribution network ODN;
  • the OLT includes the network side device and the BBU as described in the fifth design, as described in the sixth design.
  • Network side device; or, the OLT includes a seventh design
  • the network side device and the BBU described in the network include the network side device described in the eighth design.
  • the OLT sends an ONU registration request message to the baseband unit BBU.
  • the BBU pauses to allocate bandwidth resources to the user equipment UE.
  • the OLT starts the location.
  • the registration of the ONU ensures that the UE suspends the uplink service during the ONU registration, and no uplink data arrives at the RRU and the ONU, so that the data cannot be sent to the BBU in time due to the ONU registration, and the delay exceeds the requirement of the interface between the BBU and the RRU.
  • the problem of the impact of the ONU registration on the delay-sensitive service is solved, so that the PON system is applied to the mobile bearer system, which can still meet the requirements of service transmission and improve user satisfaction.
  • a data communication system comprising: a cloud controller, a baseband unit BBU and a radio remote unit RRU, and an optical line terminal OLT connected to the BBU, connected to the RRU
  • the optical network unit ONU, the OLT and each of the ONUs are connected by an optical distribution network ODN;
  • the cloud controller is configured to determine a registration start time of the ONU, and instruct the BBU to suspend allocation of bandwidth resources to the user equipment according to the ONU registration start time;
  • the BBU is configured to suspend allocation of bandwidth resources to the user equipment according to the indication of the controller.
  • the cloud controller uniformly implements resource allocation and scheduling of the OLT and the BBU, and avoids the impact of the ONU registration on the delay-sensitive service, and improves the transmission rate of the uplink service data, and solves the problem that the registered ONU needs to be After the quiet window is closed, the uplink service data can be sent. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay sensitive service.
  • FIG. 1 is a system architecture diagram of a data communication system provided by an embodiment of the present application.
  • FIG. 1a is a system architecture diagram of a data communication system according to another embodiment of the present application.
  • FIG. 2 is a schematic flow chart of a registration method provided by the first embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a registration method provided by a second embodiment of the present application.
  • FIG. 4 is a schematic flow chart of a registration method provided by a third embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a registration method provided by a fourth embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a registration method provided by a fifth embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a registration method provided by a sixth embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a first network device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a second network device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a third network device provided by an application embodiment.
  • FIG. 11 is a schematic structural diagram of a fourth network device according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a fifth network device according to an embodiment of the present application.
  • Multiple as referred to herein means two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • FIG. 1 is a system architecture diagram of a data communication system according to an embodiment of the present disclosure.
  • the data communication system includes: a Baseband Unit (BBU) and an Optical Line Terminal (OLT).
  • the OLT is a central office device in the system, for example, located in a central office (CO), with functions such as ONU registration, bandwidth allocation, and downlink data transmission.
  • the ONU is located on the terminal side device. Any of the following ONUs can be applied to an Optical Network Terminal (ONT).
  • the OLT is connected to each ONU through an optical network (ODN), wherein the OLT and the ODN are connected by a trunk optical fiber, and the ODN is connected to each ONU through a branch fiber.
  • ODN optical network
  • the mobile bearer system includes a base station and a UE, and the PON system is applied to the mobile bearer.
  • the system architecture is as shown in FIG. 1.
  • the base station includes a BBU and an RRU, and the BBU is deployed in the equipment room, and the RRU is in the RRU. It remains in the pole of the pole or roof.
  • the interface between the BBU and the RRU includes a Common Public Radio Interface (CPRI) and an Open Base Station Architecture Initiative (OBASI).
  • CPRI Common Public Radio Interface
  • OBASI Open Base Station Architecture Initiative
  • the Next Generation Fronthaul Interface (NGFI) is adopted between the BBU and the RRU to re-divide the interface between the BBU and the RRU, and to reduce the bandwidth between the BBU and the RRU while implementing the BBU and the RRU.
  • the Ethernet interface is inter-connected and can support statistical multiplexing.
  • the bandwidth is independent of the number of antennas and the number of carriers, and depends on the actual service traffic of the terminal equipment.
  • the device on the network side includes: a BBU and an OLT, where the OLT is connected to the BBU, and the device on the user side includes: an ONU, an RRU, and a UE, where the ONU is connected to the RRU, and the UE accesses the RRU through the radio.
  • the OLT is connected to each ONU through an optical distribution network.
  • the PON system shown in FIG. 1 may be an EPON system or a GPON system, or may be a 10G EPON or a 100G EPON, or may be an XG-PON, an XGS-PON, or a TWDM-PON. This is limited.
  • FIG. 2 is a registration method applied to a mobile bearer system, which shows an embodiment of the present application, which is applied to the system architecture of FIG. 1 , wherein the mobile bearer system is as shown in FIG. 1 .
  • the structure and connection relationship of the data communication system shown in Figure 1 are shown in Figure 1.
  • the method includes:
  • the OLT sends an ONU registration request message to the BBU.
  • the OLT when the OLT needs to open a silent window for ONU registration, the OLT sends an ONU registration request message to the BBU.
  • the ONU registration request message is used for a message used by the ONU to perform registration. If the GPON system is between the BBU and the RRU, the ONU registration request message may be a message requesting activation of the ONU. If the EPON system is between the BBU and the RRU, the ONU registration message may be a message requested by the ONU.
  • the message format of the ONU registration request message may be a message format recorded by a standard of various PON systems such as GPON or EPON, for example, Operation, Administration, and Maintenance (OAM), and physical layer operation management and maintenance messages ( Physical Layer OAM (PLOAM), optical network terminal management and control interface (OMCI) messages, etc., may also adopt various message formats specified by standards in the mobile bearer system of the wireless domain, or may be self- Other message formats defined, the format of the message here is not limited. In addition, the above message formats can also be applied to the following various embodiments.
  • OFAM Operation, Administration, and Maintenance
  • PLOAM Physical Layer OAM
  • OMCI optical network terminal management and control interface
  • the registration request message may be any one of the foregoing various messages, and the message content may be To include: the size of the silent window required for ONU registration.
  • the message content may further include one or more of the following: an OLT identifier, a BBU identifier, a message type, and an ONU registration period.
  • the registration period of the ONU may be seconds or minutes.
  • the OLT performs ONU registration every 10 seconds, and the registration period of the ONU is 10 seconds.
  • the size of the silence window required for the ONU registration may be determined according to the length of the fiber between the OLT and the ONU. For example, when the maximum fiber distance between the OLT and the ONU is 20 km, the silent window required for ONU registration is required. The size is usually 250 microseconds.
  • the BBU receives the registration request message sent by the OLT.
  • the BBU pauses to allocate bandwidth resources to the user equipment according to the registration request message.
  • the BBU adjusts the resource allocation mechanism.
  • the BSU allocates resources to the UE terminal to suspend the uplink service of the UE.
  • the BBU may immediately perform resource allocation modulation, suspend allocation of resources to the UE terminal, and suspend uplink service of the UE; may also perform resource allocation adjustment after a delay, and suspend to the UE.
  • the terminal allocates resources and suspends the uplink service of the UE.
  • the BBU can evaluate the current service situation. If there is no emergency service, the resource allocation adjustment can be performed, the resource allocation is suspended to the UE terminal, and the uplink service of the UE is suspended. If the emergency service currently exists, the UE resource allocation may be continued, and the ONU registration request of the OLT is rejected, and an ONU registration response message rejecting the ONU registration is generated.
  • the BBU determines a registration start time of the ONU according to the ONU registration period of the registration request and the silence window size required for the ONU registration; the BBU registers the determined ONU registration start.
  • the time, the registration period of the ONU, and the size of the silent window required for ONU registration are sent to the OLT.
  • the BBU sends an ONU registration response message to the OLT.
  • the message format of the ONU registration response message may be a message format recorded by a standard of various PON systems such as GPON or EPON, for example, Operation, Administration, and Maintenance (OAM), and physical layer operation management and maintenance messages ( Physical Layer OAM (PLOAM), optical network terminal management and control interface (OMCI) messages, etc., may also adopt various message formats specified by standards in the mobile bearer system of the wireless domain, or may be self- Other message grids defined The format of the message here is not limited. In addition, the above message formats can also be applied to the following various embodiments.
  • OFAM Operation, Administration, and Maintenance
  • PLOAM Physical Layer OAM
  • OMCI optical network terminal management and control interface
  • the ONU registration response message may be any one of the foregoing various messages, and the message content includes: an ONU registration response identifier and/or an ONU registration start time.
  • the BBU determines whether to allow the OLT to perform ONU registration according to the silence window size and current service conditions required for the ONU registration, and generates an ONU registration response identifier.
  • the ONU registration response identifier may be used to mark whether the OLT can perform ONU registration after receiving the ONU registration response message.
  • the BBU determines the registration start time of the ONU according to the size of the silent window required for the ONU registration and the current service situation.
  • the registration response message of the ONU may further include one or more of the following: a BBU identifier, an OLT identifier, a message type, an ONU registration period, and a silence window size required for ONU registration.
  • step S204 and step S206 may be interchanged, that is, after the BBU sends the ONU registration response message to the OLT, the BBU first allocates the bandwidth resource when the ONU starts to register according to the ONU registration request message and the ONU registration response message. Give the user device.
  • the OLT After receiving the response message of the BBU, the OLT starts registration of the ONU.
  • the OLT and the ONU adopt the working mechanism of the TDM-PON.
  • the OLT performs ONU registration, the OLT opens a silent window.
  • the silent window is used by the OLT to complete registration of the newly accessed ONU, so as to smooth the new ONU with unknown distance and not affect other.
  • the ONU uplink data transmission method is discovered and registered in the PON system. During this silent window, all online ONUs must stop the uplink data transmission. Otherwise, the response message sent by the new ONU back to the OLT may conflict with the uplink transmission message of the online ONU.
  • the silent window reference may be made to the GPON series standard and/or the EPON series standard, which is not limited by the embodiment of the present application.
  • the ONU registration process includes: user information acquisition of the ONU, identity assignment of the ONU, and RTT measurement, as follows:
  • the OLT receives the registration request message of the ONU, and obtains the user information of the ONU, for example, the GPON system, and the OLT obtains the serial number of the ONU (Sequence Number, SN); EPON system, the OLT obtains the (Media Access Control, MAC) address of the ONU, and assigns an identifier to the ONU, and the ONU identifier includes: an ONU identifier (Identifier, ID) or a logical link IDentifier (Logical Link IDentifier, LLID).
  • the OLT device receives the registration request sent by the newly added ONU device by opening a silent window for the ONU registration.
  • the packet is assigned to the ONU ID according to the serial number (SN) carried in the registration request packet, and the ranging of the newly added ONU device is further completed;
  • the OLT device receives the registration request message sent by the newly added ONU device by opening a silent window, so as to carry the media access control (MAC) according to the EPON standard according to the registration response message.
  • MAC media access control
  • the address is the LLID assigned to the newly added ONU device, and the round trip time (RTT) between each ONU and the OLT is calculated by ranging, and the uplink data of each ONU can be set according to the distance of the farthest ONU that is set.
  • RTT round trip time
  • the pre-equalization delay of the sending makes the logical distances of the user terminal devices consistent, so that the uplink burst data of each user terminal arrives at the OLT in an orderly manner without conflict.
  • the OLT uses the Dynamic Bandwidth Allocation (DBA) technology to uniformly schedule the uplink transmission of each ONU.
  • DBA Dynamic Bandwidth Allocation
  • the OLT after receiving the ONU registration response message sent by the BBU and rejecting the ONU registration, the OLT does not perform the ONU registration process, and may send the ONU registration request to the BBU again after a delay.
  • S210 The BBU resumes allocating resources to the user equipment UE.
  • the OLT After completing the ONU registration process, the OLT sends an ONU registration completion message to the BBU.
  • the SBU After receiving the ONU registration completion message, the SBU restores the resource allocation to the user equipment UE.
  • the BBU can also automatically allocate resources to the user equipment UE according to the ONU registration start time and the quiet window size required for the ONU registration, that is, the BBU pauses to allocate resources to the user equipment UE at the start time of the ONU registration, and pauses.
  • the time is equal to the size of the silent window required for the ONU registration.
  • the BBU resumes allocating resources to the user equipment UE.
  • the BBU may follow the determined ONU registration start time, the ONU registration period, and the ONU registration required.
  • the quiet window size periodically suspends allocation of resources to the UE terminal, and the OLT can periodically perform ONU registration according to the determined ONU registration start time, the ONU registration period, and the size of the silent window required for ONU registration.
  • the OLT sends an ONU registration request message to the baseband unit BBU, where the BBU After receiving the ONU registration request message, the bandwidth resource is temporarily allocated to the user equipment UE and the ONU registration response message is sent to the OLT. After receiving the ONU registration response message, the OLT starts registration of the ONU to ensure that the UE is registered during the ONU registration.
  • the uplink service is suspended, and no uplink data is sent to the RRU and the ONU.
  • the data cannot be sent to the BBU in time because the ONU is registered.
  • the delay between the BBU and the RRU exceeds the delay of the interface between the BBU and the RRU. The problem of the impact on the delay-sensitive service makes the application of the PON system to the mobile bearer system, which can still meet the requirements of service transmission and improve user satisfaction.
  • the foregoing embodiments can be divided into the following two specific implementation manners.
  • the embodiments described herein can be applied to Frequency Division Duplex (FDD) and Time Division Duplex (TDD) for mobile bearers.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • Figure 3 is a flow chart of one of the registration methods:
  • the OLT sends an ONU registration request message to the BBU.
  • the OLT when the OLT needs to open a silent window for ONU registration, the OLT sends an ONU registration request message to the BBU.
  • the registration request message is used for a message used by the ONU to perform registration. If the GPON system is between the BBU and the RRU, the ONU registration request message may be a message requesting activation of the ONU. If the EPON system is between the BBU and the RRU, the ONU registration message may be a message requested by the ONU.
  • the message format of the above-mentioned registration request message may be a message format recorded by a standard of various PON systems such as GPON or EPON, for example, Operation, Administration, and Maintenance (OAM), physical layer operation management and maintenance message (Physical) Layer OAM (PLOAM), optical network terminal management and control interface (OMCI) messages, etc., may also adopt various message formats specified by standards in the mobile bearer system of the wireless domain, or may be customized. Other message formats, the format of the message here is not limited. In addition, the above message formats can also be applied to the following various embodiments.
  • OFAM Operation, Administration, and Maintenance
  • PLOAM physical layer operation management and maintenance message
  • OMCI optical network terminal management and control interface
  • the registration request message may be any one of the foregoing various messages, and the message content may include: a silence window size required for ONU registration.
  • the size of the silence window required for the ONU registration may be determined according to the length of the fiber between the OLT and the ONU. For example, when the maximum fiber distance between the OLT and the ONU is 20 km, the silent window required for ONU registration is required. The size is usually 250 microseconds.
  • the message content may further include one or more of the following: an OLT identifier, a BBU identifier, and a message type.
  • the BBU After receiving the ONU registration request message sent by the OLT, the BBU pauses to allocate resources to the user equipment UE.
  • the BBU After receiving the ONU registration request message sent by the OLT, the BBU performs the resource allocation mechanism adjustment, and when the ONU registration starts, the resource allocation to the UE is suspended, that is, the uplink service of the UE is suspended.
  • the BBU may immediately perform resource allocation modulation, suspend allocation of resources to the UE terminal, and suspend uplink service of the UE; may also perform resource allocation adjustment after a delay, and suspend to the UE.
  • the terminal allocates resources and suspends the uplink service of the UE.
  • the BBU can evaluate the current service situation. If there is no emergency service, the resource allocation adjustment can be performed, the resource allocation is suspended to the UE terminal, and the uplink service of the UE is suspended. If the emergency service currently exists, the UE resource allocation may be continued, and the ONU registration request of the OLT is rejected, and an ONU registration response message rejecting the ONU registration is generated.
  • the BBU sends an ONU registration response message to the OLT.
  • the message format of the ONU registration response message may be a message format recorded by a standard of various PON systems such as GPON or EPON, for example, Operation, Administration, and Maintenance (OAM), and physical layer operation management and maintenance messages ( Physical Layer OAM (PLOAM), optical network terminal management and control interface (OMCI) messages, etc., may also adopt various message formats specified by standards in the mobile bearer system of the wireless domain, or may be self- Other message formats defined, the format of the message here is not limited. In addition, the above message formats can also be applied to the following various embodiments.
  • OFAM Operation, Administration, and Maintenance
  • PLOAM Physical Layer OAM
  • OMCI optical network terminal management and control interface
  • the ONU registration response message may be any one of the foregoing various messages, and the message content includes: an ONU registration response identifier.
  • the BBU determines whether to allow the OLT to perform ONU registration according to the silence window size and current service conditions required for the ONU registration, and generates an ONU registration response identifier.
  • the ONU registration response identifier may be used to mark whether the OLT can perform ONU registration after receiving the ONU registration response message.
  • the BBU according to the silent window size and current service required for the ONU registration
  • the registration determines the ONU registration start time
  • the ONU registration response message may further include one or more of the following: a BBU identifier, an OLT identifier, a message type, an ONU registration start time, and a silence required for ONU registration. Window size.
  • step S304 and step S306 may be interchanged, that is, after the BBU first sends an ONU registration response message to the OLT, and then according to the ONU registration request message and the ONU registration response message, the allocation is suspended when the ONU starts to register. Bandwidth resources are given to user equipment.
  • the OLT After receiving the ONU registration response message sent by the BBU, the OLT starts the registration process of the ONU, and completes the ONU registration.
  • the registration process of the ONU may refer to the GPON series standard and/or the EPON series standard, which is not limited by the embodiment of the present application.
  • the OLT does not perform the ONU registration process after receiving the ONU registration response message sent by the BBU, and may delay the ONU registration process.
  • the ONU registration request is sent to the BBU again.
  • the BBU resumes allocating resources to the user equipment UE.
  • the OLT sends an ONU registration completion message to the BBU.
  • the BBU resumes allocating resources to the user equipment UE.
  • the BBU can also automatically allocate resources to the user equipment UE according to the ONU registration start time and the quiet window size required for the ONU registration, that is, the BBU pauses to allocate resources to the user equipment UE at the start time of the ONU registration, and pauses.
  • the time is equal to the size of the silent window required for the ONU registration.
  • the BBU resumes allocating resources to the user equipment UE.
  • the BBU needs to notify the BBU every time the OLT registers the ONU, and the BBU receives the registration request of the ONU, suspends the allocation of resources for the UE, and then suspends the data transmission of the UE.
  • the BBU registers with the ONU.
  • the resource allocation to the UE is restored, and the data transmission of the UE is resumed, so that the UE pauses the uplink service during the ONU registration, and no uplink data arrives at the RRU and the ONU, so that the data cannot be sent to the BBU in time due to the ONU registration, and the delay is longer than the BBU.
  • the requirement of the delay between the interface and the RRU to solve the problem of the impact of the ONU registration on the delay-sensitive service, so that the PON system can be applied to the mobile bearer system, still meet the requirements of service transmission, and improve user satisfaction. .
  • the OLT sends an ONU registration request message to the BBU.
  • the OLT when the OLT needs to open a silent window for ONU registration, the OLT sends an ONU registration request message to the BBU.
  • the message content of the registration request message may include: a silence window size required for ONU registration and a registration period of the ONU.
  • the message content may further include one or more of the following: an OLT identifier, a BBU identifier, and a message type.
  • the registration period of the ONU may be seconds or minutes.
  • the OLT performs ONU registration every 10 seconds, and the registration period of the ONU is 10 seconds.
  • the size of the silence window required for the ONU registration may be determined according to the length of the fiber between the OLT and the ONU. For example, when the maximum fiber distance between the OLT and the ONU is 20 km, the silent window required for ONU registration is required. The size is usually 250 microseconds. S402. The BBU determines the ONU registration start time according to the registration period of the ONU and the size of the silent window required for the ONU registration.
  • the BBU evaluates the current service status and the resources that need to be allocated to the UE according to the registration period of the ONU sent by the OLT and the size of the silent window used for the ONU registration, determines the ONU registration start time, and generates an ONU registration. Response message.
  • the BBU sends the ONU registration response information to the OLT, where the response information includes: an ONU registration response identifier.
  • the registration response message of the ONU may further include one or more of the following: a BBU identifier, an OLT identifier, a message type, an ONU registration start time, an ONU registration period, and a silent window size required for ONU registration.
  • the registration response message of the ONU includes the registration period of the ONU and the size of the silent window required for the ONU registration, and is mainly used for the OLT to verify that the BBU accurately receives the registration period of the ONU and is used for the ONU registration.
  • the required quiet window size enables the BBU to suspend uplink authorization and ONU registration synchronization.
  • the BBU periodically pauses to allocate bandwidth resources to the user equipment UE.
  • the BBU periodically suspends UE resource allocation at the start of ONU registration according to the determined ONU registration start time, the ONU registration period, and the silence window size required for ONU registration.
  • the OLT periodically starts ONU registration.
  • the OLT registers the start time of the ONU, the registration period of the ONU, and the ONU according to the BBU. For the size of the silent window required for ONU registration, the ONU registration is started periodically according to the registration period of the ONU.
  • the registration of the ONU may refer to the GPON series standard and/or the EPON series standard, which is not limited by the embodiment of the present application.
  • the BBU determines that the ONU completes the registration, and restores the resource allocation of the UE.
  • the BBU determines the ONU registration completion time according to the size of the quiet window negotiated with the OLT in advance, the registration start time of the ONU, etc., restores the resource allocation of the UE after the ONU is registered, or each time the OLT completes the registration,
  • the registration completion message is sent to the BBU, and the BBU can restore the resource allocation of the UE, and no restrictions are imposed.
  • the OLT sends the ONU registration period and the size of the silent window required for the ONU registration to the BBU in advance, so that the BBU can perform the information according to the foregoing.
  • the BBU is notified to the BBU to start the ONU registration.
  • the UE suspends the uplink service, and no uplink data arrives at the RRU and the ONU.
  • FIG. 5 is a flowchart of another method for registering, which is applied to a scenario in which a wireless network is in a TDD mode, as follows:
  • the TDD mode is to transmit and receive different time slots occurring on the same frequency channel, and separate the transmission channel and the reception channel with time. For example, at time A, the base station can only transmit signals to the UE, and cannot receive signals from the UE, that is, only downlink signals are transmitted between the base station and the UE; and at time B, the base station can only receive signals from the UE, and cannot transmit to the UE.
  • the signal is transmitted, that is, there is only uplink signal transmission between the base station and the UE.
  • the network side device includes: a baseband unit BBU and an optical line terminal OLT connected to the BBU.
  • the method includes:
  • the S500 and the BBU send the subframe matching information to the OLT.
  • each radio frame has a time domain length of 10 ms and is divided into two 5 ms half frames, and each half frame is further divided into five 1 ms subframes.
  • the sub-frames are divided into uplink sub-frames, downlink sub-frames, and special sub-frames.
  • the protocol supports 7-seed frame configurations, which are applicable to different service requirements.
  • Table 1 shows the subframe ratio information
  • TDD-LTE supports two downlink to uplink switching cycles, which are 5ms and 10ms, respectively. Regardless of the switching point period, the 0th and 5th subframes are downlink subframes, as follows:
  • 5ms switching point including subframe ratios 0, 1, 2, and 6, and there are special subframes in the two fields, which are located in subframes 1 and 6 respectively;
  • subframe 6 can be considered as a special subframe with a DwPTS length of 1 ms.
  • Different sub-frame ratios define the ratio of different uplink and downlink subframes, such as ratio 5, and the ratio of uplink and downlink subframes is 1:8, which is suitable for scenarios that focus on downlink applications. 3:1, suitable for scenarios that focus on upstream applications.
  • the BBU sends the above subframe ratio information to the OLT.
  • the OLT receives the subframe ratio information sent by the BBU.
  • the OLT monitors downlink and/or uplink data flow distribution, and calculates a time slot used for ONU registration according to the received subframe matching information.
  • the OLT monitors the downlink and/or uplink data flow arrival, and calculates the time slot corresponding to the downlink subframe in the subframe matching information according to the subframe matching information, and the OLT may select the downlink subframe corresponding to the downlink subframe.
  • the time slot is used as a time slot for ONU registration.
  • the OLT uses the BBU feedback subframe matching information and the distribution of the downlink and/or uplink data streams obtained by the monitoring, and calculates the time slot corresponding to the downlink subframe in the subframe matching information.
  • the time slot is exactly the uplink idle time slot, and the UE has no data, that is, the OLT and the ONU.
  • the uplink channel between the two will also be idle, and the OLT can use the time slot to complete the registration of the ONU, thereby improving the utilization of the time slot and the transmission efficiency of the system.
  • the OLT can monitor the downlink and/or uplink data flow arrival status for a long time, evaluate the obtained uplink subframe downlink ratio information, and calculate and obtain the subframe ratio according to the subframe ratio information.
  • the time slot corresponding to the downlink subframe in the information the OLT may select the time slot corresponding to the downlink subframe as the time slot for ONU registration.
  • the OLT starts registration of the ONU according to the calculated time slot.
  • the OLT starts the registration of the ONU according to the calculated time slot, and completes the registration process of the ONU.
  • the OLT calculates the subframe for the optical network unit by using the subframe ratio information provided by the baseband unit BBU according to the received subframe ratio information and the monitored downlink and/or uplink data distribution.
  • the gap is used to avoid the impact of the ONU registration on the delay-sensitive service, and the ONU is registered by using the transmission time slot of the downlink subframe in the subframe matching information of the BBU, thereby improving the transmission rate of the uplink service data and solving the problem.
  • the registered ONU needs to send the uplink service data after the end of the silent window. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay sensitive service.
  • FIG. 6 is another registration method applied to the data communication system architecture as shown in FIG. 1a.
  • Figure 1a includes: a cloud controller, a BBU, an OLT, an ONU, an RRU, and a UE.
  • the cloud controller may be connected to the BBU as shown in FIG. 1a, connected to the OLT through the BBU, or may be The cloud controller is connected to the OLT at the BBU.
  • the OLT is connected to each ONU through an optical distribution network ODN, and the ONU is connected to the RRU, and the RRU is connected to the UE by using a radio.
  • the UE may be various user equipments, such as a mobile phone, a computer, or the like.
  • FIG. 1a further adds a cloud controller on the network side, where the cloud controller is used for joint scheduling of wireless mobile bearer and PON network bandwidth, and the remaining network components and connections.
  • the relationship is the same as in Fig. 1.
  • the cloud controller receives an instruction to start the ONU registration, and determines an ONU registration start time.
  • the cloud controller can receive an instruction to initiate registration of a single ONU, that is, the operator initiates ONU registration on the PON device management system and/or the PON management platform, and the PON device management system and/or Or the PON management platform initiates an ONU registration command to the cloud controller.
  • the operator may set a periodic startup ONU registration on the PON device management system and/or the PON management platform, and the PON device management system and/or the PON management platform periodically initiate an ONU registration instruction to the cloud controller.
  • the operator can also set the periodic startup ONU registration on the cloud controller, and the cloud controller can periodically trigger the ONU registration according to the set ONU registration period.
  • the registration command of the ONU may include, but is not limited to, one or more of the following: an ONU registration period, a size of a silent window required for ONU registration, and an identifier of an OLT to be activated by the ONU.
  • the cloud controller determines a registration start time of the ONU according to an ONU registration period in the registration instruction of the ONU and a silence window size required for ONU registration.
  • the registration command of the ONU may further include an identifier of the BBU connected to the OLT to be activated by the ONU to be activated.
  • the cloud controller may determine the identifier of the BBU connected thereto according to the identifier of the OLT that is to be activated by the ONU that is included in the registration instruction of the ONU. Further, the cloud controller may further determine the registration start time of the ONU according to the ONU registration period and the size of the silence window required for the ONU registration, and the resource allocation of the BBU to the UE.
  • the cloud controller can evaluate the current service situation. If there is no emergency service, the ONU registration is started immediately, that is, the current time is set as the ONU registration start time; if there is an emergency currently exists For business, you can postpone the ONU registration. For example, when the emergency service is completed, the time is set to the ONU registration start time.
  • the cloud controller determines an ONU registration start time according to an uplink and downlink subframe ratio of the wireless network, and arranges the ONU registration when the wireless network is idle.
  • the gap is carried out.
  • the cloud controller pauses to allocate bandwidth resources to the UE.
  • the cloud controller pauses allocation of bandwidth resources to the user equipment and the size of the silent window according to the ONU registration start time.
  • the cloud controller allocates a bandwidth resource to the UE under the BBU connected to the OLT that is to be activated by the ONU.
  • the cloud controller determines the ONU registration start time according to the uplink and downlink subframe ratio of the wireless network, and arranges the ONU registration on the wireless network.
  • the cloud controller does not need to suspend allocation of bandwidth resources to the UE.
  • the cloud controller instructs the OLT to complete registration of the ONU.
  • the cloud controller pauses to suspend the service bandwidth authorization for all ONUs under the OLT registered to be started by the ONU according to the ONU registration start time and the silent window, and starts a silent window.
  • the OLT completes the ONU registration according to the instruction of the cloud controller.
  • the OLT completes registration of the ONU in the determined silent window according to the indication of the cloud controller.
  • the cloud controller resumes allocating bandwidth resources and ONUs to the UE.
  • the cloud controller allocates bandwidth resources to the UE under the BBU that is connected to the OLT that is to be activated by the ONU.
  • the cloud controller restores the service bandwidth authorization to the ONU under the OLT.
  • Steps S700-S712 are a process in which the cloud controller performs joint scheduling on the wireless and PON bandwidth resources; and steps 714-S720 are based on a method flow of the cloud controller performing ONU registration.
  • S700 The UE requests bandwidth resources from the cloud controller through the BBU.
  • the ONU requests bandwidth resources from the cloud controller through the OLT.
  • S704 The cloud controller performs radio resource and PON bandwidth calculation.
  • the cloud controller performs calculation according to the bandwidth resource requested by the UE, that is, the radio resource and the bandwidth resource requested by the ONU, that is, the bandwidth resource of the PON, and determines the radio resource allocated to the UE and the PON bandwidth resource allocated to the ONU.
  • the cloud controller sends the allocated radio resource to the UE by using the BBU.
  • S708 The cloud controller sends a PON bandwidth authorization to the OLT.
  • the cloud controller suspends radio resource and PON bandwidth allocation.
  • the cloud controller pauses the radio resource allocation and the PON bandwidth allocation according to the bandwidth requirement of the UE request and the ONU request for the silence window size registered by the ONU.
  • the cloud controller determines the ONU registration start time according to the UE request and the bandwidth resource requested by the ONU and the silent window size for the ONU registration, when the ONU registration starts. , suspend wireless resource allocation and PON bandwidth allocation.
  • the cloud controller When the cloud controller receives the command to start the periodic ONU registration, the cloud controller determines the ONU registration start time according to the bandwidth request and the ONU registration period of the ONU request, and determines the ONU registration start time according to the ONU. The registration period periodically suspends radio resource allocation and PON bandwidth allocation when ONU registration begins. S712. The cloud controller notifies the OLT to start registration of the ONU.
  • the cloud controller notifying the OLT to start the registration of the ONU may include: an ONU registration start time.
  • the message content may further include one or more of the following: an OLT identifier, a message type, an ONU registration period, and a silent window size required for ONU registration.
  • the OLT opens a silent window, and starts ONU registration.
  • the registration process of the ONU may refer to the GPON series standard and/or the EPON series standard, which is not limited by the embodiment of the present application.
  • the cloud controller restores radio resource allocation and PON bandwidth allocation of the UE.
  • the cloud controller may further allocate resources to the user equipment UE and allocate bandwidth to the PON according to the ONU registration start time and the silence window size required for the ONU registration, that is, the cloud controller pauses at the ONU registration start time.
  • the user equipment UE allocates resources and allocates bandwidth to the PON.
  • the pause time is equal to the size of the silent window required for the ONU registration.
  • the cloud controller resumes allocating resources to the user equipment UE and allocating bandwidth to the PON.
  • the cloud controller uniformly implements resource allocation and scheduling of the OLT and the BBU, and avoids the influence of the ONU registration on the delay-sensitive service, and improves the transmission of the uplink service data.
  • the transmission rate is set to solve the problem that the registered ONU needs to send the uplink service data after the end of the silence window. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay sensitive service.
  • a network device which may be an optical line terminal OLT in a PON system. details as follows:
  • a network side device includes:
  • the transceiver 800 is configured to send an optical network unit ONU registration request message to the baseband unit BBU, and receive a response message of the BBU.
  • the processor 802 is configured to start registration of the ONU after the transceiver receives the response message of the BBU.
  • the registration request includes: a silence window size required for ONU registration.
  • the response message of the BBU includes: an ONU registration response identifier determined by the BBU.
  • the transceiver is further configured to send an ONU registration completion message to the BBU.
  • the processor may be a media access control MAC device, or another microprocessor; the transceiver may be disposed in an optical module of the OLT, where the transceiver may include a transmitter and a receiver, and the transmitter and the Receivers can be integrated or separated separately.
  • a network device which may be a baseband unit BBU.
  • the network side device includes:
  • the transceiver 900 is configured to receive a registration request message sent by the OLT.
  • the controller 902 is configured to suspend allocation of bandwidth resources to the user equipment according to the registration request message.
  • the registration request message includes: a silence window size required for ONU registration.
  • controller is further configured to determine a registration start time of the ONU according to a silence window size required for ONU registration.
  • the transceiver is further configured to send the determined ONU registration start time to the OLT.
  • the transceiver is further configured to send an ONU registration response identifier determined by the BBU to the OLT;
  • the ONU registration response identifier is used to mark whether the OLT can perform ONU registration after receiving the ONU registration response message.
  • the controller may be a microprocessor or other processor for resource allocation to the user equipment UE in a wireless mobile bearer network.
  • the network device device OLT and the BBU may refer to the system structure diagram of FIG. 1 , and the functions performed by the OLT and the BBU in the ONU registration process may also refer to FIG. 2 to FIG. 6 and corresponding methods in the method embodiment. The detailed description of the embodiments will not be repeated here.
  • the OLT sends an ONU registration request message to the baseband unit BBU.
  • the BBU pauses to allocate the bandwidth resource to the user equipment UE.
  • the OLT starts.
  • the registration of the ONU ensures that the UE suspends the uplink service during the ONU registration, and no uplink data arrives at the RRU and the ONU, so that the data cannot be sent to the BBU in time due to the ONU registration, and the delay exceeds the delay between the interface between the BBU and the RRU.
  • the requirement to solve the problem of the impact of the ONU registration on the delay-sensitive service enables the application of the PON system to the mobile bearer system, which can still meet the requirements of service transmission and improve user satisfaction.
  • a network device which may be an optical line terminal OLT in a PON system.
  • the network side device includes:
  • the transceiver 1000 is configured to receive subframe ratio information sent by the baseband unit BBU.
  • the controller 1002 is configured to calculate a time slot for the ONU registration of the optical network unit according to the received subframe matching information, and start registration of the ONU according to the calculated time slot.
  • controller 1002 is further configured to send an ONU registration message to the BBU through the transceiver.
  • controller is specifically configured to calculate a time slot corresponding to the matching information of the downlink subframe in the subframe matching information, and select the calculated time slot as a time slot for ONU registration.
  • the network device determines the time slot corresponding to the matching information of the downlink subframe in the subframe matching information as the time slot for the ONU registration, and the UE does not send the uplink in the time slot.
  • the subframe is sent to the BBU, and the ONU is registered by using the time slot, which not only solves the problem of the existing low delay, but also improves the transmission rate and transmission efficiency of the uplink service data, and greatly mentions the bandwidth utilization.
  • the OLT calculates the time slot for the ONU registration of the optical network unit according to the received subframe ratio information through the subframe matching information of the baseband unit BBU, thereby avoiding the ONU registration for the delay sensitive service.
  • the ONU is registered by using the transmission time slot of the downlink subframe in the subframe matching information of the BBU, and the transmission rate of the uplink service data is improved, and the registered ONU needs to be sent after the silence window ends.
  • the service data causes a large delay in the transmission of uplink service data, which cannot meet the problem of delay-sensitive service demand for system delay.
  • a network side device which may be a cloud controller, may be a cloud controller in the system shown in FIG. 1a.
  • the network side device includes:
  • the calculating unit 1100 is configured to determine a registration start time of the ONU;
  • the processing unit 1102 is configured to suspend allocation of bandwidth resources to the user equipment according to the registration start time of the ONU.
  • the calculating unit 1100 is configured to receive an instruction for starting ONU registration, where the instruction for starting the ONU registration includes: an ONU registration period and a size of a silent window required for ONU registration; according to the ONU The ONU registration period in the registration instruction and the size of the silent window required for ONU registration determine the registration start time of the ONU.
  • FIG. 1a For details of the detailed interaction between the OLT and the BBU, refer to FIG. 1a, FIG. 6, and FIG. 7 and a detailed description of the corresponding method embodiments.
  • the cloud controller is a device that is independent of the OLT and the BBU exists on the network side, and the message or indication information sent by the cloud controller is sent to the OLT or the BBU, and the Dynamic Bandwidth Allocation (DBA) module of the OLT receives the message. And the corresponding processing, or the pool pool of the BBU is received and processed accordingly.
  • DBA Dynamic Bandwidth Allocation
  • the cloud controller uniformly implements resource allocation and scheduling of the OLT and the BBU, and avoids the impact of the ONU registration on the delay-sensitive service, improves the transmission rate of the uplink service data, and solves the problem that the registered ONU needs to be After the quiet window is closed, the uplink service data can be sent. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay sensitive service.
  • the OLT sends an optical network unit ONU registration request message to the baseband unit BBU. After receiving the response message of the BBU, the registration of the ONU is started.
  • the BBU is configured to receive a registration request message sent by the OLT; and, according to the registration request message, temporarily allocate a bandwidth resource to the user equipment to temporarily allocate the bandwidth resource.
  • the registration request includes: a silence window size required for ONU registration.
  • the response message of the BBU includes: an ONU registration response identifier determined by the BBU.
  • the OLT sends an ONU registration completion message to the BBU.
  • the BBU determines a registration start time of the ONU according to the silence window size required for the ONU registration, and sends the determined ONU registration start time to the OLT.
  • the BBU sends an ONU registration response identifier determined by the BBU to the OLT, where the ONU registration response identifier is used to mark whether the OLT can perform ONU registration after receiving the ONU registration response message.
  • a registration method described in FIG. 2 to FIG. 4 and the corresponding embodiment can be applied to the system.
  • the OLT sends an ONU registration request message to the baseband unit BBU, and after receiving the ONU registration request message, the BBU pauses to allocate the bandwidth resource to the user equipment UE, and the OLT receives the response of the BBU.
  • the registration of the ONU is started, and the impact of the ONU registration on the delay-sensitive service is avoided, so that the BBU pauses the allocation of resources for the UE during the ONU registration, thereby improving user satisfaction.
  • a data communication system as shown in FIG. 1, the system includes: a baseband unit BBU and a radio remote unit RRU, an optical line terminal OLT connected to the BBU, and an optical network unit ONU connected to the RRU, the OLT Connected to each of the ONUs through an optical distribution network ODN;
  • the OLT is configured to receive the subframe ratio information sent by the baseband unit BBU, calculate a time slot for the ONU registration according to the received subframe ratio information, and start the ONU according to the calculated time slot. registered;
  • the BBU is configured to send subframe matching information to the OLT.
  • a registration method described in FIG. 5 and the corresponding embodiments can be
  • the specific functions of the OLT and the BBU refer to the description of the corresponding embodiments.
  • the OLT calculates the time slot for the ONU registration of the optical network unit according to the received subframe ratio information through the subframe matching information of the baseband unit BBU, thereby avoiding the ONU registration for the delay sensitive service.
  • the ONU is registered by using the transmission time slot of the downlink subframe in the subframe matching information of the BBU, and the transmission rate of the uplink service data is improved, and the registered ONU needs to be sent after the silence window ends.
  • the service data causes a large delay in the transmission of uplink service data, which cannot meet the problem of delay-sensitive service demand for system delay.
  • a data communication system as shown in FIG. 1a, the system includes: a cloud controller, a baseband unit BBU and a radio remote unit RRU, an optical line terminal OLT connected to the BBU, and an optical network connected to the RRU a unit ONU, the OLT and each of the ONUs are connected by an optical distribution network ODN;
  • the cloud controller is configured to determine a registration start time of the ONU, and instruct the BBU to suspend the allocation of the bandwidth resource to the user equipment to temporarily allocate the bandwidth resource according to the ONU registration start time;
  • the OLT is configured to receive an indication of the controller, and initiate registration of the ONU;
  • the BBU is configured to suspend allocation of bandwidth resources to the user equipment according to the indication of the controller.
  • the determining, by the cloud controller, the registration start time of the ONU specifically includes:
  • the cloud controller receives an instruction to initiate ONU registration, and the instruction for starting the ONU registration includes: an ONU registration period and a silence window size required for ONU registration; and an ONU registration period and a usage according to the ONU registration instruction.
  • the required quiet window size is registered with the ONU to determine the registration start time of the ONU.
  • a registration method described in FIG. 6-7 and the corresponding embodiment can be applied to the system.
  • the cloud controller uniformly implements resource allocation and scheduling of the OLT and the BBU, and avoids the impact of the ONU registration on the delay-sensitive service, and improves the transmission rate of the uplink service data.
  • the registered ONU needs to send the uplink service data after the end of the silent window. As a result, there is a large delay in the transmission of the uplink service data, which cannot meet the problem of the delay of the delay-sensitive service.
  • the embodiment of the invention further provides a data communication device, as shown in FIG. 12, the data communication
  • the device includes a processor, a memory, and a bus system, the processor and the memory being coupled by the bus system, the memory for storing instructions, the processor for executing instructions stored by the memory,
  • the processor is configured to: send an optical network unit ONU registration request message to the baseband unit BBU; and after receiving the response message of the BBU, start registration of the ONU.
  • the processor may be configured to: receive a registration request message sent by the OLT; and, according to the registration request message, suspend allocation of a bandwidth resource to a user equipment to temporarily allocate a bandwidth resource.
  • the processor may be further configured to: receive subframe ratio information sent by the baseband unit BBU; and calculate a time slot for the ONU registration of the optical network unit according to the received subframe ratio information. And registering the registration of the ONU according to the calculated time slot.
  • the processor may be further configured to: determine a registration start time of the ONU; and instruct the BBU to suspend allocation of the bandwidth resource to the user equipment to temporarily allocate the bandwidth resource according to the ONU registration start time.
  • the device after receiving the registration request message, the device temporarily allocates the bandwidth resource to the user equipment, and ensures that no uplink data arrives at the RRU and the ONU during the registration period, thereby preventing the data from being sent to the BBU in time due to the ONU registration, and the delay
  • the problem of the delay of the interface between the BBU and the RRU is solved.
  • the problem of the impact of the ONU registration on the delay-sensitive service is solved.
  • the application of the PON system to the mobile bearer system can still meet the requirements of service transmission and improve user satisfaction. degree.
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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Abstract

本申请公开了一种数据通信系统、OLT及BBU，涉及光通信领域，OLT发送光网络单元ONU注册请求消息给基带单元BBU；接收所述BBU的响应消息后，启动所述ONU的注册暂停分配带宽资源，避免了ONU注册对时延敏感业务产生的影响,使得BBU在ONU注册期间，暂停为UE分配资源，进而提高了用户满意度。

Description

数据通信系统、光线路终端及基带单元 技术领域
本申请涉及光通信领域，特别涉及一种数据通信系统、光线路终端(Optical Line Terminal，OLT)及基带单元(Baseband Unit，BBU)。
背景技术
无源光网络(Passive Optical Network，PON)是一种点对多点的网络拓扑结构，通常包括位于中心局的光线路终端(Optical Line Terminal，OLT)、位于用户端的多个光网络单元(Optical Network Unit，ONU)以及位于两者之间的光分配网络(Optical Distribution Network，ODN)。
PON系统中，新增ONU需要在OLT处完成注册后，才能通过上行通道向OLT发送上行业务数据。对于以太网无源光网络(Ethernet Passive Optical Network，EPON)系统，OLT通过开静默窗口的方式，接收新增ONU通过上行通道发送的注册响应报文，从而根据注册响应报文中携带的媒体访问控制(Media Access Control，MAC)地址为新增ONU分配逻辑链路标识(Logical Link IDentifier，LLID)，并对新增ONU进行测距，进而实现EPON系统中对新增ONU的注册；而对于吉比特无源光网络(Gigabit-Capable Passive Optical Network，GPON)系统，OLT通过开静默窗口的方式，接收新增ONU发送的注册响应报文，从而根据注册响应报文中携带的序列号(Serial Number，SN)分配ONU ID，并进一步完成对新增ONU的测距，进而实现GPON系统中对新增ONU的注册。
完成注册后，已注册的ONU根据OLT分配的上行发送时隙，采用时分多址(Time Division Multiple Access，TDMA)的方式通过上行通道向OLT发送上行业务数据，以此避免不同ONU发送的上行业务数据在上行通道上产生冲突。同时，为了避免上行通道中注册响应报文和上行业务数据之间产生冲突，在新增ONU注册期间，OLT将停止给已注册的ONU进行带宽授权，即已注册的ONU将停止发送上行业务数据。
PON系统中，已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统延 时的需求，例如将PON系统应用于移动承载的场景下，基带单元(Baseband Unit,BBU)和射频拉远单元(Remote Radio Unit，RRU)之间的接口要求时延小于100us，由于PON系统中OLT完成对新增ONU的注册，一般开一次静默窗口通常在200～250us之间，此时，所有已经注册的ONU只能等待200～250us之后才能进行正常数据通信，这将导致移动承载的场景下的时延无法满足业务传输所要求的100us时延的性能要求。
发明内容
为了解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。所述技术方案如下：
第一种设计方案，提供了一种注册方法，应用于移动承载系统，，所述方法包括：
光线路终端OLT发送光网络单元ONU注册请求消息给基带单元BBU；
所述OLT接收所述BBU的响应消息后，启动所述ONU的注册。
一种可能的设计中，所述注册请求包括：用于ONU注册所需的静默窗口大小。
一种可能的设计中，所述BBU的响应消息包括：所述BBU确定的ONU注册响应标识。
一种可能的设计中，所述方法还包括：
所述OLT发送ONU注册完成消息给所述BBU。
本设计方案中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE，所述OLT接收所述BBU的响应消息后，启动所述ONU的注册，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
第二种设计方案中，提供了另一种注册方法，应用于移动承载系统的网络侧设备，所述网络侧设备包括：基带单元BBU和与所述BBU连接的光线路终 端OLT，所述方法包括：所述BBU接收所述OLT发送的注册请求消息；所述BBU根据所述注册请求消息，暂停分配带宽资源给用户设备。
基于上述的涉及方案，一种可能的设计中，所述注册请求消息包括：用于ONU注册所需的静默窗口大小。
基于上述的涉及方案，另一种可能的设计中，所述方法还包括：
所述BBU根据所述用于ONU注册所需的静默窗口大小，确定ONU的注册起始时间；将所述确定的ONU注册起始时间发送给所述OLT。
基于上述的涉及方案，一种可能的设计中，所述方法还包括：
所述BBU发送BBU确定的ONU注册响应标识给所述OLT；其中，所述ONU注册响应标识用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
本设计方案中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE，所述OLT接收所述BBU的响应消息后，启动所述ONU的注册，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
第三种设计方案中，提供了一种注册方法，应用于移动承载系统，所述方法包括：
光线路终端OLT接收基带单元BBU发送的子帧配比信息；所述OLT根据接收到的子帧配比信息，计算用于光网络单元ONU注册的时隙；所述OLT根据所述计算的时隙，启动所述ONU的注册。
基于第三种设计方案，所述OLT根据接收到的子帧配比信息，计算用于ONU注册的时隙具体包括：
所述OLT计算所述子帧配比信息中下行子帧的配比信息对应的时隙；
所述OLT选择所述计算的时隙作为用于ONU注册的时隙。
通过第三种设计方案，OLT通过基带单元BBU提供的子帧配比信息，根据接收到的子帧配比信息以及监控到的下行和/或上行数据分布情况，计算用于光网络单元ONU注册的时隙，避免了ONU注册对时延敏感业务产生的影响 的同时，利用BBU的子帧配比信息中的下行子帧的传送时隙，进行ONU的注册，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
第四种设计方案中，提供了一种注册方法，应用于移动承载系统的网络侧设备，所述网络侧设备包括：云端控制器、基带单元BBU和与所述BBU连接的光线路终端OLT，所述方法包括：
所述云端控制器确定ONU的注册起始时间；所述云端控制器根据所述ONU注册起始时间，指示所述BBU暂停分配带宽资源给用户设备。
基于第四种设计方案，一种可能的设计为：
所述云端控制器确定ONU的注册起始时间具体包括：
所述云端控制器接收启动ONU注册的指令，所述启动ONU注册的指令包括：ONU注册周期和用于ONU注册所需的静默窗口大小；根据所述ONU的注册指令中的ONU注册周期和用于ONU注册所需的静默窗口大小，确定所述ONU的注册起始时间。
本实施例中，云端控制器统一实现OLT与BBU的资源分配与调度，避免了ONU注册对时延敏感业务产生的影响的同时，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
第五种设计方案中，提供了一种网络侧设备，所述网络侧设备包括：
收发器，用于发送光网络单元ONU注册请求消息给基带单元BBU；接收所述BBU的响应消息；
处理器，用于在所述收发器接收到BBU的响应消息后，启动所述ONU的注册。
本设计方案中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE，所述OLT接收所述BBU的响应消息后，启动所述ONU的注册，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求， 进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
基于第五种设计方案，一种可能的设计方案为：
所述注册请求包括：用于ONU注册所需的静默窗口大小。
基于第五种设计方案，另一种可能的设计方案为：
所述BBU的响应消息包括：所述BBU确定的ONU注册响应标识。
基于第五种设计方案，另一种可能的设计方案为：
所述收发器，还用于发送ONU注册完成消息给所述BBU。
第六种设计方案中，提供了一种网络侧设备，所述网络侧设备包括：
收发器，用于接收所述OLT发送的注册请求消息；
控制器，用于根据所述注册请求消息，暂停分配带宽资源给用户设备。
本设计方案中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE，所述OLT接收所述BBU的响应消息后，启动所述ONU的注册，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
基于第六种设计方案，另一种可能的设计方案为：
所述注册请求消息包括：用于ONU注册所需的静默窗口大小。
基于第六种设计方案，另一种可能的设计方案为：
所述控制器，还用于根据用于ONU注册所需的静默窗口大小，确定ONU的注册起始时间；
所述收发器，还用于将所述确定的ONU注册起始时间发送给所述OLT。
基于第六种设计方案，另一种可能的设计方案为：
所述收发器，还用于发送BBU确定的ONU注册响应标识给所述OLT；其中，所述ONU注册响应标识用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
第七种设计方案中，提供了一种网络侧设备，所述网络侧设备包括：
收发器，用于接收基带单元BBU发送的子帧配比信息；
控制器，用于根据接收到的子帧配比信息，计算用于光网络单元ONU注 册的时隙；根据所述计算的时隙，启动所述ONU的注册。
通过第七种设计方案，OLT通过基带单元BBU提供的子帧配比信息，根据接收到的子帧配比信息以及监控到的下行和/或上行数据分布情况，计算用于光网络单元ONU注册的时隙，避免了ONU注册对时延敏感业务产生的影响的同时，利用BBU的子帧配比信息中的下行子帧的传送时隙，进行ONU的注册，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
基于第七种设计方案，一种可能的设计为：
所述控制器，具体用于计算所述子帧配比信息中下行子帧的配比信息对应的时隙，选择所述计算的时隙作为用于ONU注册的时隙。
第八种设计方案，提供了一种网络侧设备，所述网络侧设备包括：
计算单元，用于确定ONU的注册起始时间；
处理单元，用于根据所述ONU的注册起始时间，暂停分配带宽资源给用户设备。
本设计方案中，该网络设备统一实现OLT与BBU的资源分配与调度，避免了ONU注册对时延敏感业务产生的影响的同时，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
基于第八种提供的设计，一种可能的设计为：
第八种所述计算单元，具体用于接收启动ONU注册的指令，所述启动ONU注册的指令包括：ONU注册周期和用于ONU注册所需的静默窗口大小；根据所述ONU的注册指令中的ONU注册周期和用于ONU注册所需的静默窗口大小，确定所述ONU的注册起始时间。
第九种设计方案中，提供了一种数据通信系统，所述系统包括：基带单元BBU和射频拉远单元RRU，与所述BBU连接的光线路终端OLT，与所述RRU连接的光网络单元ONU，所述OLT与各个所述ONU之间通过光分配网络ODN相连；所述OLT包括如第五种设计方案所述的网络侧设备和所述BBU包括如第六种设计方案中所述的网络侧设备；或者，所述OLT包括第七种设计方案 中所述的网络侧设备和所述BBU包括第八种设计方案中的所述的网络侧设备。
本设计方案中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE，所述OLT接收所述BBU的响应消息后，启动所述ONU的注册，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
第十种设计方案中，提供了一种数据通信系统，所述系统包括：云端控制器，基带单元BBU和射频拉远单元RRU，与所述BBU连接的光线路终端OLT，与所述RRU连接的光网络单元ONU，所述OLT与各个所述ONU之间通过光分配网络ODN相连；
所述云端控制器，用于确定ONU的注册起始时间；根据所述ONU注册起始时间，指示所述BBU暂停分配带宽资源给用户设备；
所述BBU，用于根据所述控制器的指示，暂停分配带宽资源给用户设备。
本设计方案中，云端控制器统一实现OLT与BBU的资源分配与调度，避免了ONU注册对时延敏感业务产生的影响的同时，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
附图说明
图1示出了本申请一个实施例提供的数据通信系统的系统架构图；
图1a示出了本申请另一个实施例提供的数据通信系统的系统架构图；
图2示出了本申请第一个实施例提供的注册方法流程示意图；
图3示出了本申请第二个实施例提供的注册方法流程示意图；
图4示出了本申请第三个实施例提供的注册方法流程示意图；
图5示出了本申请第四个实施例提供的注册方法流程示意图；
图6示出了本申请第五个实施例提供的注册方法流程示意图；
图7示出了本申请第六个实施例提供的注册方法流程示意图；
图8示出了本申请实施例提供的第一种网络设备的结构示意图；
图9示出了本申请实施例提供的第二种网络设备的结构示意图；
图10示出了申请实施例提供的第三种网络设备的结构示意图；
图11示出了申请实施例提供的第四种网络设备的结构示意图；
图12示出了本申请实施例提供的第五种网络设备的结构示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
在本文中提及的“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
请参考图1，其示出了本申请一个实施例提供的数据通信系统的系统架构图，该数据通信系统中包括：基带单元(Baseband Unit，BBU)、光线路终端(Optical Line Terminal，OLT)、光网络单元(Optical Network Unit,ONU)、射频拉远单元(Remote Radio Unit,RRU)和用户设备(User Equipment,UE),其中，所述无源光网络系统(Passive Optical Network，PON)包括OLT和ONU，OLT是系统中的局端设备，例如位于中心站(Central Office,CO)，具有ONU注册、带宽分配和下行数据发送等功能。ONU位于终端侧设备，下面凡是涉及ONU，均可以适用于光网络终端(Optical Network Terminal，ONT)。OLT通过光分配网络(Optical Network Network，ODN)与各个ONU进行连接，其中OLT与所述ODN之间通过主干光纤连接，所述ODN到各个ONU之间通过分支光纤连接。
所述移动承载系统包括基站和UE，将PON系统应用到移动承载的场景中，形成的系统架构如图1所示，所述基站包括BBU和RRU，其中BBU在机房进行集中布放，而RRU仍保留在电线杆或屋顶的外壳中。BBU集中部署后，BBU和RRU之间的接口有通用公共设备接口(Common Public Radio Interface，CPRI)、开放式基站架构(Open Base Station Architecture Initiative，OBASI)等，其中，所述CPRI为基站设备使用的主流接口。随着技术的发展，目前业界正 在探讨在BBU和RRU之间采用下一代前传接口(Next Generation Fronthaul Interface，NGFI)，以对BBU和RRU之间的接口进行重新划分，在降低BBU和RRU之间带宽的同时实现BBU和RRU之间接口的以太化，并可以支持统计复用，实现带宽与天线数和载波数无关，而依赖于终端设备的实际业务流量。
如图1所示，位于网络侧设备包括：BBU和OLT，OLT与BBU连接，位于用户侧的设备包括：ONU、RRU和UE，所述ONU与RRU连接，所述UE通过无线接入RRU，所述OLT通过光分配网络与各个ONU连接。
需要说明的是，图1所示的PON系统可以为EPON系统、GPON系统；也可以是10G EPON、100G EPON；还可以是XG-PON，XGS-PON，TWDM-PON，本申请实施例并不对此进行限定。
下面所描述的各种注册方法均适用于上述图1的系统。
请参考图2，图2为一种注册方法，应用于移动承载系统，其示出了本申请一个实施例，应用于上述图1的系统架构中，其中，所述移动承载系统为图1所示的数据通信系统，其结构和连接关系均如图1所示。
所述方法包括：
S200、OLT发送ONU注册请求消息给BBU。
具体地，当OLT需要开启静默窗口进行ONU注册时，OLT向BBU发送ONU注册请求消息。
所述ONU注册请求消息用于ONU进行注册时使用的消息。若BBU与RRU之间是GPON系统，则该ONU注册请求消息可以为请求ONU激活的消息，若BBU与RRU之间为EPON系统，则该ONU注册消息可以为请求ONU发现的消息。
所述ONU注册请求消息的消息格式可以采用GPON或者EPON等各种PON系统的标准记载的消息格式，例如运行管理和维护消息(Operation,Administration,and Maintenance，OAM)，物理层运行管理维护消息(Physical Layer OAM，PLOAM)，光网络终端管理控制接口(optical network terminal management and control interface，OMCI)消息等，也可以采用无线领域的移动承载系统中标准规定的各种消息格式，或者也可以是自定义的其它消息格式，这里消息采用的格式不作限制。另外，上述这些消息格式也可以应用到下面的各种实施例中。
可选地，所述注册请求消息可以为上述各种消息的任意一种，消息内容可 以包括：用于ONU注册所需的静默窗口大小。
进一步地，所述消息内容还可以包括下面的一种或者几种：OLT标识，BBU标识，消息类型，ONU的注册周期。所述ONU的注册周期单位可以是秒或者分钟，例如OLT每10秒进行一次ONU注册，则ONU的注册周期为10秒；
所述用于ONU注册所需的静默窗口大小可以根据OLT与ONU的之间的光纤长度确定，例如OLT和ONU之间的最大光纤距离为20km时，所述用于ONU注册所需的静默窗口大小通常为250微秒。
S202、BBU接收所述OLT发送的注册请求消息。
S204、BBU根据所述注册请求消息，暂停分配带宽资源给用户设备。
具体地，当BBU接收到OLT发送的ONU注册请求后，进行资源分配机制调整，在ONU注册开始时，暂停给UE终端分配资源，暂停UE的上行业务。
可选地，当BBU接收到OLT发送的ONU注册请求后，可立即进行资源分配调制，暂停给UE终端分配资源，暂停UE的上行业务；也可延迟一段时间后进行资源分配调整，暂停给UE终端分配资源，暂停UE的上行业务。
可选地，当BBU接收到OLT发送的ONU注册请求后，可评估当前业务情况，如果当前无紧急业务，则可进行资源分配调整，暂停给UE终端分配资源，暂停UE的上行业务。如果当前存在紧急业务，则可继续进行UE资源分配，并拒绝OLT的ONU注册请求，生成拒绝ONU注册的ONU注册响应消息。
可选地，所述BBU根据所述注册请求的ONU注册周期和所述用于ONU注册所需的静默窗口大小，确定ONU的注册起始时间；所述BBU将所述确定的ONU注册起始时间、ONU的注册周期及用于ONU注册所需的静默窗口大小发送给所述OLT。
S206、BBU发送ONU注册响应消息给OLT。
所述ONU注册响应消息的消息格式可以采用GPON或者EPON等各种PON系统的标准记载的消息格式，例如运行管理和维护消息(Operation,Administration,and Maintenance，OAM)，物理层运行管理维护消息(Physical Layer OAM，PLOAM)，光网络终端管理控制接口(optical network terminal management and control interface，OMCI)消息等，也可以采用无线领域的移动承载系统中标准规定的各种消息格式，或者也可以是自定义的其它消息格 式，这里消息采用的格式不作限制。另外，上述这些消息格式也可以应用到下面的各种实施例中。
可选地，所述ONU注册响应消息可以为上述各种消息的任意一种，消息内容包括：ONU注册响应标识和/或ONU注册起始时间。
具体地，BBU根据所述用于ONU注册所需的静默窗口大小和当前业务情况确定是否允许OLT进行ONU注册，生成ONU注册响应标识。所述ONU注册响应标识可以用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。进一步地，BBU根据所述用于ONU注册所需的静默窗口大小和当前业务情况确定ONU的注册起始时间。
进一步地，所述ONU的注册响应消息还可以包括下面的一种或者几种：BBU标识，OLT标识，消息类型，ONU注册周期以及用于ONU注册所需的静默窗口大小。
可选地，步骤S204和步骤S206的顺序可以互换，即BBU先发送ONU注册响应消息给OLT后，再根据所述ONU注册请求消息和ONU注册响应消息，在ONU开始注册时暂停分配带宽资源给用户设备。
S208、OLT接收所述BBU的响应消息后，启动所述ONU的注册。
OLT与ONU采用TDM-PON的工作机制，OLT进行ONU注册时，OLT打开静默窗口，该静默窗口用于OLT对新接入的ONU完成注册，以便把距离未知的新ONU以平滑、不影响其他ONU上行数据发送的方式发现和注册到PON系统中。在这个静默窗口时间内，所有在线ONU都必须停止上行数据发送，否则，新ONU发送回OLT的激响应报文就可能与在线ONU的上行发送报文产生冲突。关于静默窗的指定方式可参考GPON系列标准和/或EPON系列标准，本申请实施例并不对此进行限定。
ONU的注册过程包括：ONU的用户信息获取、ONU的标识分配和RTT测量，具体如下:OLT收到ONU的注册请求消息，获取ONU的用户信息，例如GPON系统，OLT获取ONU的序列号(Sequence Number，SN)；EPON系统，OLT获取ONU的(Media Access Control，MAC)地址，并给ONU分配标识，所述ONU标识包括：ONU标识(Identifier,ID)或者逻辑链路标识(Logical Link IDentifier，LLID)。具体可以为：对于吉比特无源光网络(Gigabit-Capable Passive Optical Network，GPON)系统，OLT设备通过开辟用于ONU注册使用的静默窗口的方式，接收新增ONU设备发送的注册请求 报文，从而根据注册请求报文中携带的序列号(Serial Number，SN)分配ONU ID，并进一步完成对新增ONU设备的测距；对于以太网无源光网络(Ethernet Passive Optical Network，EPON)系统，OLT设备通过开辟静默窗口的方式，接收新增ONU设备发送的注册请求报文，从而根据注册响应报文中，根据EPON标准的规定，携带的媒体访问控制(Media Access Control，MAC)地址为新增ONU设备分配LLID，并通过测距计算出各个ONU和OLT之间的往返时间(Round Trip Time，RTT)，并可根据设定的最远的ONU的距离，设置各ONU上行数据发送的预均衡时延，使得各用户终端设备的逻辑距离一致，从而使得各用户终端上行突发数据有序到达OLT而不产生冲突。
在ONU完成注册之后，由OLT通过动态带宽分配(Dynamic Bandwidth Allocation,DBA)技术统一调度各个ONU的上行发送时候，各用户终端根据局端的授权在规定的时隙内发送数据给OLT，达到有效避免从ONU到OLT的上行方向的数据突发的冲突问题。
所述ONU的注册更为具体的过程可参考GPON系列标准和/或EPON系列标准，本申请实施例并不对此进行限定。
可选地，OLT接收到BBU发送的拒绝ONU注册的ONU注册响应消息后，不进行ONU注册过程，可延迟一段时间后再次向BBU发送ONU注册请求。
S210、BBU恢复给用户设备UE分配资源。
可选地，
S208、OLT完成ONU注册过程后，发送ONU注册完成消息给所述BBU。
S210、BBU接收ONU注册完成消息后，恢复给用户设备UE分配资源。
可选地，BBU还可以根据ONU注册起始时间、以及用于ONU注册所需的静默窗口大小自行恢复给用户设备UE分配资源，即BBU在ONU注册开始时刻暂停给用户设备UE分配资源，暂停时间等于ONU注册所需的静默窗口大小，当静默窗口大小到达后，BBU恢复给用户设备UE分配资源。
可选地，如果OLT向BBU请求周期性地进行ONU注册，BBU将确定的ONU注册起始时间发送给OLT后，BBU可以按照确定的ONU注册起始时间、ONU注册周期、ONU注册所需的静默窗口大小周期性地暂停给UE终端分配资源，OLT则可以按照确定的ONU注册起始时间、ONU注册周期、ONU注册所需的静默窗口大小周期性地进行ONU注册。
本实施例中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU 接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE并给OLT发送ONU注册响应消息，所述OLT接收所述ONU注册响应消息后，启动所述ONU的注册，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，BBU和RRU之间的时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
上述实施例可以分为如下两种具体的实施方式，这里描述的实施例都可以应用到针对移动承载的频分双工(Frequency Division Duplex，FDD)、时分双工(Time Division Duplex，TDD)的无线系统中。
第一种如图3所示，图3为其中一种注册的方法流程图：
S300、OLT发送ONU注册请求消息给BBU。
具体地，当OLT需要开启静默窗口进行ONU注册时，OLT向BBU发送ONU注册请求消息。
所述该注册请求消息用于ONU进行注册时使用的消息。若BBU与RRU之间是GPON系统，则该ONU注册请求消息可以为请求ONU激活的消息，若BBU与RRU之间为EPON系统，则该ONU注册消息可以为请求ONU发现的消息。
上述的注册请求消息的消息格式可以采用GPON或者EPON等各种PON系统的标准记载的消息格式，例如运行管理和维护消息(Operation,Administration,and Maintenance，OAM)，物理层运行管理维护消息(Physical Layer OAM，PLOAM)，光网络终端管理控制接口(optical network terminal management and control interface，OMCI)消息等，也可以采用无线领域的移动承载系统中标准规定的各种消息格式，或者也可以是自定义的其它消息格式，这里消息采用的格式不作限制。另外，上述这些消息格式也可以应用到下面的各种实施例中。
可选地，所述注册请求消息可以为上述各种消息的任意一种，消息内容可以包括：用于ONU注册所需的静默窗口大小。
所述用于ONU注册所需的静默窗口大小可以根据OLT与ONU的之间的光纤长度确定，例如OLT和ONU之间的最大光纤距离为20km时，所述用于ONU注册所需的静默窗口大小通常为250微秒。
进一步地，所述消息内容还可以包括下面的一种或者几种：OLT标识，BBU标识，消息类型。
S302、当BBU接收到OLT发送的ONU注册请求消息后，暂停给用户设备UE分配资源。
具体地，BBU接收到OLT发送的ONU注册请求消息后，进行资源分配机制调整，在ONU注册开始时，暂停给UE分配资源，即暂停UE的上行业务。
可选地，当BBU接收到OLT发送的ONU注册请求后，可立即进行资源分配调制，暂停给UE终端分配资源，暂停UE的上行业务；也可延迟一段时间后进行资源分配调整，暂停给UE终端分配资源，暂停UE的上行业务。
可选地，当BBU接收到OLT发送的ONU注册请求后，可评估当前业务情况，如果当前无紧急业务，则可进行资源分配调整，暂停给UE终端分配资源，暂停UE的上行业务。如果当前存在紧急业务，则可继续进行UE资源分配，并拒绝OLT的ONU注册请求，生成拒绝ONU注册的ONU注册响应消息。
S304、BBU给OLT发送ONU注册响应消息。
所述ONU注册响应消息的消息格式可以采用GPON或者EPON等各种PON系统的标准记载的消息格式，例如运行管理和维护消息(Operation,Administration,and Maintenance，OAM)，物理层运行管理维护消息(Physical Layer OAM，PLOAM)，光网络终端管理控制接口(optical network terminal management and control interface，OMCI)消息等，也可以采用无线领域的移动承载系统中标准规定的各种消息格式，或者也可以是自定义的其它消息格式，这里消息采用的格式不作限制。另外，上述这些消息格式也可以应用到下面的各种实施例中。
可选地，所述ONU注册响应消息可以为上述各种消息的任意一种，消息内容包括：ONU注册响应标识。
具体地，BBU根据所述用于ONU注册所需的静默窗口大小和当前业务情况确定是否允许OLT进行ONU注册，生成ONU注册响应标识。所述ONU注册响应标识可以用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
进一步地，BBU根据所述用于ONU注册所需的静默窗口大小和当前业务 情况确定ONU的注册起始时间，所述ONU的注册响应消息还可以包括下面的一种或者几种：BBU标识，OLT标识，消息类型，ONU注册起始时间以及用于ONU注册所需的静默窗口大小。
可选地，步骤S304和步骤S306的顺序可以互换，即BBU先发送ONU注册响应消息给OLT后，再根据所述ONU注册请求消息和所述ONU注册响应消息，在ONU开始注册时暂停分配带宽资源给用户设备。
S306、OLT接收到BBU发送的ONU注册响应消息后，启动ONU的注册过程，完成ONU注册。
所述ONU的注册过程可参考GPON系列标准和/或EPON系列标准，本申请实施例并不对此进行限定。
可选地，当BBU和UE之间存在紧急业务，BBU拒绝OLT的ONU注册请求时，OLT接收到BBU发送的拒绝ONU注册的ONU注册响应消息后，不进行ONU注册过程，可延迟一段时间后再次向BBU发送ONU注册请求。
S308、BBU恢复给用户设备UE分配资源。
可选地，OLT完成ONU注册过程后，发送ONU注册完成消息给所述BBU。BBU接收ONU注册完成消息后，恢复给用户设备UE分配资源。
可选地，BBU还可以根据ONU注册起始时间、以及用于ONU注册所需的静默窗口大小自行恢复给用户设备UE分配资源，即BBU在ONU注册开始时刻暂停给用户设备UE分配资源，暂停时间等于ONU注册所需的静默窗口大小，当静默窗口大小到达后，BBU恢复给用户设备UE分配资源。
上述的实施例中，每次OLT进行ONU的注册，都需要通知BBU，BBU收到ONU的注册请求，暂停为UE分配资源，进而暂停UE的数据传输，直到ONU注册完成后，BBU在ONU注册完成后恢复对UE的资源分配，恢复UE的数据传输，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户的满意度。
另一种实施例，如图4所示如下：
S400、OLT发送ONU注册请求消息给BBU。
具体地，当OLT需要开启静默窗口进行ONU注册时，OLT向BBU发送ONU注册请求消息。
所述注册请求消息的消息内容可以包括：用于ONU注册所需的静默窗口大小以及ONU的注册周期。
进一步地，所述消息内容还可以包括下面的一种或者几种：OLT标识，BBU标识，消息类型。
所述ONU的注册周期单位可以是秒或者分钟，例如OLT每10秒进行一次ONU注册，则ONU的注册周期为10秒；
所述用于ONU注册所需的静默窗口大小可以根据OLT与ONU的之间的光纤长度确定，例如OLT和ONU之间的最大光纤距离为20km时，所述用于ONU注册所需的静默窗口大小通常为250微秒。S402、BBU根据ONU的注册周期及用于ONU注册所需的静默窗口大小，确定ONU注册起始时间。
需要注意的是，BBU根据OLT发送的ONU的注册周期以及用于ONU注册所需的静默窗口大小，评估当前业务情况和需要给UE分配的资源等，确定ONU注册起始时间，并生成ONU注册响应消息。
S404、BBU发送ONU注册响应信息给OLT，其中，所述响应信息包括：ONU注册响应标识。
进一步地，所述ONU的注册响应消息还可以包括下面的一种或者几种：BBU标识，OLT标识，消息类型，ONU注册起始时间、ONU注册周期以及用于ONU注册所需的静默窗口大小。这里需要说明的是，所述ONU的注册响应消息中包括ONU的注册周期和用于ONU注册所需的静默窗口大小，主要用于OLT校验BBU准确接收到ONU的注册周期和用于ONU注册所需的静默窗口大小，实现BBU暂停上行授权和ONU注册同步。
S406、BBU周期性地暂停给用户设备UE分配带宽资源。
具体地，BBU按确定的ONU注册起始时间、ONU的注册周期及用于ONU注册所需的静默窗口大小，周期性地在ONU注册开始时暂停UE资源分配。
S408、OLT周期性地启动ONU注册。
具体地，OLT根据BBU下发的ONU注册起始时间、ONU的注册周期及 用于ONU注册所需的静默窗口大小，按ONU的注册周期周期性地启动ONU注册。
所述ONU的注册可参考GPON系列标准和/或EPON系列标准，本申请实施例并不对此进行限定。
S410、BBU确定ONU完成注册后，恢复UE的资源分配。
这里无论是BBU自己根据预先与OLT协商好的静默窗的大小，ONU的注册起始时间等确定ONU注册完成时间，在ONU注册完后后恢复UE的资源分配，还是每次OLT完成注册后，发送注册完成消息给BBU，BBU再恢复UE的资源分配的方式都可以，不做任何限制。
需要注意的是，该实施例与图3对应的实施例的区别在于，OLT预先将ONU注册周期和所述用于ONU注册所需的静默窗口大小发送给BBU，使得BBU可以根据上述携带的信息，确定ONU的注册起始时间，并按照确定的ONU的注册起始时间，周期性地暂停为UE分配资源，即暂停UE发送数据到局端，这样OLT不需要每次进行ONU注册都发送消息给BBU，通知BBU要开始进行ONU注册保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户的满意度。
如图5所示，图5为另一种注册的方法流程图，应用于无线网络为TDD模式的场景中，具体如下：
所述TDD模式为发送和接收发生在同一频率信道的不同时隙，用时间来分离发送信道和接收信道。例如，在时刻A，基站仅能向UE发送信号，不能接收来自UE的信号，即在基站和UE之间只有下行信号传输；而在时刻B，基站仅能接收来自UE的信号，不能向UE发送信号，即在基站和UE之间只有上行信号传输。
所述网络侧设备包括：基带单元BBU和与所述BBU连接的光线路终端OLT，具体可参见图1所示的系统架构，所述方法包括：
S500、BBU发送子帧配比信息给OLT。
在以TDD-LTE系统为例中，每个无线帧时域长度为10ms，分为两个5ms的半帧，每个半帧又分为5个1ms的子帧。子帧分为上行子帧、下行子帧和特殊子帧，协议支持7种子帧配置，适用不同的业务需求。
如下表1所示，表1为子帧配比信息：
表1子帧配比信息
Figure PCTCN2016111931-appb-000001
由表1看到，TDD-LTE支持两种下行至上行切换周期，分别是5ms和10ms。无论哪种切换点周期，第0号和第5号子帧都是下行子帧，具体如下：
5ms切换点：包括子帧配比0、1、2和6，在两个半帧内都有特殊子帧，分别位于1号和6号子帧；
10ms切换点：包括子帧配比3、4和5，只在1号子帧内有特殊子帧，可以认为6号子帧是DwPTS长度为1ms的特殊子帧。
不同的子帧配比定义了不同的上下行子帧的比例，比如配比5，上下行子帧比例为1:8，适用于注重下行应用的场景；而配比0上下行子帧比例为3:1，适用于注重上行应用的场景。
BBU将上述子帧配比信息发送给OLT。
S502、OLT接收BBU发送的子帧配比信息。
S504、OLT监控下行和/或上行数据流分布情况，并根据接收到的子帧配比信息，计算用于ONU注册的时隙。
OLT监控下行和/或上行数据流到达情况，并根据所述子帧配比信息，计算获得所述子帧配比信息中下行子帧对应的时隙，则OLT可选择所述下行子帧对应的时隙作为用于ONU注册的时隙。
这里主要是OLT利用BBU反馈子帧配比信息以及监控获得的下行和/或上行数据流分布情况，计算获得所述子帧配比信息中下行子帧对应的时隙，此时对于上行而言，该时隙正好是上行的空闲时隙，UE没有数据，即OLT和ONU 之间的上行通道也将空闲，OLT则可利用该时隙去完成ONU的注册，进而提高的时隙的利用率和系统的传输效率。
可选地，OLT可长时间监控下行和/或上行数据流到达情况，评估获得无线链路上下行子帧配比信息，并根据所述子帧配比信息，计算获得所述子帧配比信息中下行子帧对应的时隙，则OLT可选择所述下行子帧对应的时隙作为用于ONU注册的时隙。
S506、所述OLT根据所述计算的时隙，启动所述ONU的注册。
OLT根据计算的时隙，启动ONU的注册，并完成ONU的注册过程。
本实施例中，OLT通过基带单元BBU提供的子帧配比信息，根据接收到的子帧配比信息以及监控到的下行和/或上行数据分布情况，计算用于光网络单元ONU注册的时隙，避免了ONU注册对时延敏感业务产生的影响的同时，利用BBU的子帧配比信息中的下行子帧的传送时隙，进行ONU的注册，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
如图6所示，图6为另一种注册方法，应用于如图1a所示的数据通信系统架构。
图1a中包括：云端控制器、BBU、OLT、ONU、RRU以及UE，所述云端控制器可以如图1a所示，与所述BBU连接，通过所述BBU，与OLT连接，也可以是所述云端控制器分别于BBU和OLT连接。所述OLT通过光分配网络ODN与各ONU连接，所述ONU与所述RRU连接，所述RRU通过无线与UE连接，所述UE可以是各种用户设备，例如手机、计算机等。
图1a与图1的系统的架构的不同在于，图1a在网络侧还增加了个云端控制器，该云端控制器用于进行无线移动承载和PON网络带宽的联合调度，具体其余的网络元件与连接关系与图1相同。
应用于图1a的注册方法，如图6所示，具体如下：
S600、云端控制器接收启动ONU注册的指令，确定ONU注册起始时间。
具体地，云端控制器可接收指令启动单次ONU的注册，即操作人员在PON设备管理系统和/或PON管理平台上启动ONU注册，PON设备管理系统和/ 或PON管理平台向云端控制器发起ONU注册的指令。
进一步地，操作人员可在PON设备管理系统和/或PON管理平台上设置周期性启动ONU注册，PON设备管理系统和/或PON管理平台周期性地向云端控制器发起ONU注册的指令。
进一步地，操作人员还可在云端控制器上设置周期性启动ONU注册，则云端控制器可按照设定的ONU注册周期进行周期性地触发ONU注册。
所述ONU的注册指令可包括但不限于下面的一种或者几种：ONU注册周期、用于ONU注册所需的静默窗口大小、待启动ONU注册的OLT的标识。
具体地，所述云端控制器根据所述ONU的注册指令中的ONU注册周期和用于ONU注册所需的静默窗口大小，确定所述ONU的注册起始时间。
所述ONU的注册指令还可包括与待启动ONU注册的OLT相连的BBU的标识。
可选地，云端控制器可根据所述ONU的注册指令中包含的待启动ONU注册的OLT的标识，确定与之相连的BBU的标识。进一步地，云端控制器还可以根据ONU注册周期和用于ONU注册所需的静默窗口大小，以及BBU给UE的资源分配情况确定ONU的注册起始时间。
可选地，云端控制器接收启动ONU注册的指令后，可评估当前业务情况，如果当前无紧急业务，则立即启动ONU注册，即将当前时刻设置为所述ONU注册起始时间；如果当前存在紧急业务，则可推迟启动ONU注册。例如当紧急业务完成后的时刻设置为所述ONU注册起始时间。
进一步地，所述方法应用于无线网络为TDD模式的场景中时，所述云端控制器根据无线网络的上下行子帧配比确定ONU注册起始时间，将ONU注册安排在无线网络上行空闲时隙进行。
S602、云端控制器暂停给UE分配带宽资源。
具体地，云端控制器根据所述ONU注册起始时间，暂停分配带宽资源给用户设备、所述静默窗口大小，。
进一步地，云端控制器将暂停给与待启动ONU注册的OLT相连的BBU下的UE分配带宽资源。
可选地，所述方法应用于无线网络为TDD模式的场景中时，因为所述云端控制器根据无线网络的上下行子帧配比确定ONU注册起始时间，将ONU注册安排在无线网络上行空闲时刻进行，则云端控制器无需暂停给UE分配带宽资源。
S604、云端控制器指示OLT完成ONU的注册。
具体地，所述云端控制器根据所述ONU注册起始时间以及所述静默窗口，暂停给待启动ONU注册的OLT下所有ONU暂停业务带宽授权，并开启静默窗口。
S606，OLT按照云端控制器指示完成ONU注册。
具体地，所述OLT根据所述云端控制器的指示在所述确定的静默窗口完成ONU的注册。
S606、云端控制器恢复给UE分配带宽资源和ONU。
具体地，云端控制器在OLT完成ONU的注册后，恢复给与待启动ONU注册的OLT相连的BBU下的UE分配带宽资源。
进一步地，云端控制器在OLT完成ONU的注册后，恢复给该OLT下ONU进行业务带宽授权。
暂停分配带宽资源暂停分配带宽资源暂停分配带宽资源
具体地实施例描述如下：
步骤S700-S712为云端控制器对无线以及PON的带宽资源进行联合调度的过程；步骤714-S720是基于云端控制器进行ONU注册的方法流程介绍。
S700、UE通过BBU向云端控制器请求带宽资源。
S702、ONU通过OLT向云端控制器请求带宽资源。
S704、云端控制器进行无线资源和PON带宽计算。
具体地，云端控制器根据UE请求的带宽资源即无线资源以及ONU请求的带宽资源即PON的带宽资源，进行计算，确定出分配给UE的无线资源和分配给ONU的PON带宽资源。
S706、云端控制器通过BBU将分配的无线资源下发给UE。
S708、云端控制器向OLT下发PON带宽授权。
下面是基于云端控制器进行ONU注册的方法流程介绍：
S710、云端控制器暂停无线资源和PON带宽分配。
具体地，云端控制器根据UE请求和ONU请求的带宽资源，用于ONU注册的静默窗口大小，暂停无线资源分配和PON带宽分配。
具体地，当云端控制器接收指令启动单次ONU注册时，云端控制器根据UE请求和ONU请求的带宽资源、用于ONU注册的静默窗口大小，确定ONU注册起始时间，在ONU注册开始时，暂停无线资源分配和PON带宽分配。
当云端控制器接收指令启动周期性启动ONU注册时，云端控制器根据UE请求和ONU请求的带宽资源、ONU注册周期，用于ONU注册的静默窗口大小，确定ONU注册起始时间，并根据ONU注册周期，周期性地在ONU注册开始时，暂停无线资源分配和PON带宽分配。S712、云端控制器通知OLT启动ONU的注册。
具体地，云端控制器通知OLT启动ONU的注册的消息内容可包括：ONU注册起始时间。
进一步地，所述消息内容还可以包括下面的一种或者几种：OLT标识、消息类型、ONU注册周期和用于ONU注册所需的静默窗口大小。
S714、OLT开静默窗，启动ONU注册。
所述ONU的注册过程可参考GPON系列标准和/或EPON系列标准，本申请实施例并不对此进行限定。
S716、云端控制器恢复UE的无线资源分配和PON带宽分配。
具体地，云端控制器还可以根据ONU注册起始时间、以及用于ONU注册所需的静默窗口大小恢复给用户设备UE分配资源和给PON分配带宽，即云端控制器在ONU注册开始时刻暂停给用户设备UE分配资源和给PON分配带宽，暂停时间等于ONU注册所需的静默窗口大小，当静默窗口大小到达后，云端控制器恢复给用户设备UE分配资源和给PON分配带宽。
本实施例中，云端控制器统一实现OLT与BBU的资源分配与调度，避免了ONU注册对时延敏感业务产生的影响的同时，提高了上行业务数据的传 输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
下面具体介绍装置的实施例以及系统的实施例，需要说明的是，为了不再重复赘述，下面的装置以及系统的实施例涉及的各个装置以及系统均适用于上述的各种实施例的注册方法流程，这里简单描述下，必要时，可以引用上面的各种注册方法的实施例进一步描述。
如图8所示，一种网络设备，该网络设备可以为一种PON系统中的光线路终端OLT。具体如下：
一种网络侧设备包括：
收发器800，用于发送光网络单元ONU注册请求消息给基带单元BBU；接收所述BBU的响应消息。
处理器802，用于在所述收发器接收到BBU的响应消息后，启动所述ONU的注册。
进一步可选地，所述注册请求包括：用于ONU注册所需的静默窗口大小。
进一步可选地，所述BBU的响应消息包括：所述BBU确定的ONU注册响应标识。
所述收发器，还用于发送ONU注册完成消息给所述BBU。
其中，所述处理器可以为媒体接入控制MAC器，或者其它微处理器；所述收发器可以设置在OLT的光模块中，其中，收发器，可以包括发送器以及接收器，发送器与接收器可以集成在一起，也可以独立分开。
如图9所示，一种网络设备，该网络设备可以是基带单元BBU。
所述网络侧设备包括：
收发器900，用于接收所述OLT发送的注册请求消息。
控制器902，用于根据所述注册请求消息，暂停分配带宽资源给用户设备。
进一步可选地，所述注册请求消息包括：用于ONU注册所需的静默窗口大小。
进一步可选地，所述控制器，还用于根据用于ONU注册所需的静默窗口大小，确定ONU的注册起始时间。
所述收发器，还用于将所述确定的ONU注册起始时间发送给所述OLT。
所述收发器，还用于发送BBU确定的ONU注册响应标识给所述OLT； 其中，所述ONU注册响应标识用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
所述控制器可以为一种微处理器或者其它处理器，用于在无线的移动承载网络中对用户设备UE进行资源分配。
上述图8与图9中关于网络设备设备OLT与BBU可以参照图1的系统结构图，具体OLT与BBU在ONU注册过程中完成的功能也可以参照方法实施例中图2-图6以及对应的实施例的具体描述，这里就不再赘述。
具体的，上述OLT与BBU的详细交互过程，请参见图2-图4以及对应的方法实施例的具体描述。
上述的实施例中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE，所述OLT接收所述BBU的响应消息后，启动所述ONU的注册，保证在ONU注册期间UE暂停上行业务，无上行数据到达RRU和ONU，避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，进而解决ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
如图10所示，一种网络设备，该网络设备可以为一种PON系统中的光线路终端OLT。
所述网络侧设备包括：
收发器1000，用于接收基带单元BBU发送的子帧配比信息。
控制器1002，用于用于根据接收到的子帧配比信息，计算用于光网络单元ONU注册的时隙；根据所述计算的时隙，启动所述ONU的注册。
进一步可选地，所述控制器1002，还用于将ONU注册消息通过收发器发给所述BBU。
进一步可选地，所述控制器，具体用于计算所述子帧配比信息中下行子帧的配比信息对应的时隙，选择所述计算的时隙作为用于ONU注册的时隙。
该网络设备通过BBU的子帧配比信息，确定子帧配比信息中的下行子帧的配比信息对应的时隙作为用于ONU注册的时隙，此时隙内，UE不会发送上行子帧到BBU，利用该时隙，进行ONU的注册，不仅可以解决现有的低时延的问题，而且还可以提高上行业务数据的传输速率和传输效率，极大提到带宽的利用率。
具体的，上述OLT与BBU的详细交互过程，请参见图5以及对应的方法实施例的具体描述。
本实施例中，OLT通过基带单元BBU的子帧配比信息，根据接收到的子帧配比信息，计算用于光网络单元ONU注册的时隙，避免了ONU注册对时延敏感业务产生的影响的同时，利用BBU的子帧配比信息中的下行子帧的传送时隙，进行ONU的注册，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
如图11所示，一种网络侧设备，该网络侧设备可以为云端控制器，具体可以为图1a所示的系统中的云端控制器。
所述网络侧设备包括：
计算单元1100，用于确定ONU的注册起始时间；
处理单元1102，用于根据所述ONU的注册起始时间，暂停分配带宽资源给用户设备。
进一步可选地，所述计算单元1100，具体用于接收启动ONU注册的指令，所述启动ONU注册的指令包括：ONU注册周期和用于ONU注册所需的静默窗口大小；根据所述ONU的注册指令中的ONU注册周期和用于ONU注册所需的静默窗口大小，确定所述ONU的注册起始时间。
具体的，上述OLT与BBU的详细交互过程，请参见图1a、图6、图7及对应的方法实施例的具体描述。
需要说明的是，云端控制器为独立于OLT以及BBU单独存在于网络侧的设备，云端控制器发送的消息或者指示信息给OLT或者BBU，OLT的动态带宽分配(Dynamic Bandwidth Allocation，DBA)模块接收并进行相应处理，或者BBU的池Pool接收到并进行相应的处理。
本实施例中，云端控制器统一实现OLT与BBU的资源分配与调度，避免了ONU注册对时延敏感业务产生的影响的同时，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
如图1所示的一种数据通信系统，所述系统包括：基带单元BBU和射频 拉远单元RRU，与所述BBU连接的光线路终端OLT，与所述RRU连接的光网络单元ONU，所述OLT与各个所述ONU之间通过光分配网络ODN相连；
所述OLT，发送光网络单元ONU注册请求消息给基带单元BBU；接收所述BBU的响应消息后，启动所述ONU的注册。
所述BBU，用于接收所述OLT发送的注册请求消息；根据所述注册请求消息，暂停分配带宽资源给用户设备暂停分配带宽资源。
进一步可选地，所述注册请求包括：用于ONU注册所需的静默窗口大小。
进一步可选地，所述BBU的响应消息包括：所述BBU确定的ONU注册响应标识。
进一步可选地，所述OLT发送ONU注册完成消息给所述BBU。
进一步可选地，所述BBU根据所述用于ONU注册所需的静默窗口大小，确定ONU的注册起始时间；将所述确定的ONU注册起始时间发送给所述OLT。
进一步可选地，所述BBU发送BBU确定的ONU注册响应标识给所述OLT；其中，所述ONU注册响应标识用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
对于图1所示的系统，图2-图4以及对应的实施例描述的一种注册方法都可以适用于该系统，具体OLT以及BBU完成的具体功能请参见相应的实施例的描述。
本实施例提供的数据通信系统中，OLT发送ONU注册请求消息给基带单元BBU，所述BBU接收该ONU注册请求消息后，暂停分配带宽资源给用户设备UE，所述OLT接收所述BBU的响应消息后，启动所述ONU的注册，避免了ONU注册对时延敏感业务产生的影响,使得BBU在ONU注册期间，暂停为UE分配资源，进提高了用户满意度。
一种数据通信系统，如图1，所述系统包括：基带单元BBU和射频拉远单元RRU，与所述BBU连接的光线路终端OLT，与所述RRU连接的光网络单元ONU，所述OLT与各个所述ONU之间通过光分配网络ODN相连；
所述OLT，用于接收基带单元BBU发送的子帧配比信息；根据接收到的子帧配比信息，计算用于ONU注册的时隙；根据所述计算的时隙，启动所述ONU的注册；
所述BBU，用于发送子帧配比信息给所述OLT。
对于图1所示的系统，图5以及对应的实施例描述的一种注册方法都可以 适用于该系统，具体OLT以及BBU完成的具体功能请参见相应的实施例的描述。
本实施例中，OLT通过基带单元BBU的子帧配比信息，根据接收到的子帧配比信息，计算用于光网络单元ONU注册的时隙，避免了ONU注册对时延敏感业务产生的影响的同时，利用BBU的子帧配比信息中的下行子帧的传送时隙，进行ONU的注册，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
一种数据通信系统，如图1a所示，所述系统包括：云端控制器，基带单元BBU和射频拉远单元RRU，与所述BBU连接的光线路终端OLT，与所述RRU连接的光网络单元ONU，所述OLT与各个所述ONU之间通过光分配网络ODN相连；
所述云端控制器，用于确定ONU的注册起始时间；根据所述ONU注册起始时间，指示所述BBU暂停分配带宽资源给用户设备暂停分配带宽资源；
所述OLT，用于接收所述控制器的指示，启动ONU的注册；
所述BBU，用于根据所述控制器的指示，暂停分配带宽资源给用户设备。
进一步地，所述云端控制器确定ONU的注册起始时间具体包括：
所述云端控制器接收启动ONU注册的指令，所述启动ONU注册的指令包括：ONU注册周期和用于ONU注册所需的静默窗口大小；根据所述ONU的注册指令中的ONU注册周期和用于ONU注册所需的静默窗口大小，确定所述ONU的注册起始时间。
对于图1a所示的系统，图6-图7以及对应的实施例描述的一种注册方法都可以适用于该系统，具体OLT以及BBU完成的具体功能请参见相应的实施例的描述。
本实施例提供的数据通信系统中，云端控制器统一实现OLT与BBU的资源分配与调度，避免了ONU注册对时延敏感业务产生的影响的同时，提高了上行业务数据的传输速率，解决已注册的ONU需要在静默窗口结束后才能发送上行业务数据，导致上行业务数据的发送存在较大时延，无法满足时延敏感业务对系统时延的需求的问题。
本发明实施例还提供了一种数据通信设备，如图12所示，所述数据通信 设备包括：处理器、存储器和总线系统，所述处理器和所述存储器通过所述总线系统相连，所述存储器用于存储指令，所述处理器用于执行所述存储器存储的指令，
其中，所述处理器用于：发送光网络单元ONU注册请求消息给基带单元BBU；接收所述BBU的响应消息后，启动所述ONU的注册。
在另一种实施例中，所述处理器可以用于：接收所述OLT发送的注册请求消息；根据所述注册请求消息，暂停分配带宽资源给用户设备暂停分配带宽资源。
在另一种实施例中，所述处理器还可以用于：接收基带单元BBU发送的子帧配比信息；根据接收到的子帧配比信息，计算用于光网络单元ONU注册的时隙；根据所述计算的时隙，启动所述ONU的注册。
在另一种实施例中，所述处理器还可以用于：确定ONU的注册起始时间；根据所述ONU注册起始时间，指示所述BBU暂停分配带宽资源给用户设备暂停分配带宽资源。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
本实施例中，当设备接收到注册请求消息后，暂停分配带宽资源给用户设备，保证在注册期间无上行数据到达RRU和ONU，进而避免因为ONU注册而导致数据无法及时发送给BBU，时延超过BBU和RRU之间接口对时延的要求，解决了ONU注册对时延敏感业务产生的影响的问题,使得将PON系统应用到移动承载系统中，仍然能满足业务传输的要求，提高用户满意度。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本申请的具体实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (26)

  1. 一种注册方法，应用于移动承载系统，其特征在于，所述方法包括：
    光线路终端OLT发送光网络单元ONU注册请求消息给基带单元BBU；
    所述OLT接收所述BBU的响应消息后，启动所述ONU的注册。
  2. 根据权利要求1所述的注册方法，其特征在于，所述注册请求包括：用于ONU注册所需的静默窗口大小。
  3. 根据权利要求2所述的注册方法，其特征在于，所述BBU的响应消息包括：所述BBU确定的ONU注册响应标识。
  4. 根据权利要求1所述的注册方法，其特征在于，所述方法还包括：
    所述OLT发送ONU注册完成消息给所述BBU。
  5. 一种注册方法，应用于移动承载系统的网络侧设备，所述网络侧设备包括：基带单元BBU和与所述BBU连接的光线路终端OLT，其特征在于，所述方法包括：
    所述BBU接收所述OLT发送的注册请求消息；
    所述BBU根据所述注册请求消息，暂停分配带宽资源给用户设备；
    所述BBU指示所述OLT完成ONU注册。
  6. 根据权利要求5所述的注册方法，其特征在于，所述注册请求消息包括：用于ONU注册所需的静默窗口大小。
  7. 根据权利要求6所述的注册方法，其特征在于，所述方法还包括：
    所述BBU根据所述用于ONU注册所需的静默窗口大小，确定ONU的注册起始时间；
    所述BBU将所述确定的ONU注册起始时间发送给所述OLT。
  8. 根据权利要求6所述的注册方法，其特征在于，所述方法还包括：
    所述BBU发送BBU确定的ONU注册响应标识给所述OLT；其中，所述ONU注册响应标识用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
  9. 一种注册方法，应用于移动承载系统，其特征在于，所述方法包括：
    光线路终端OLT接收基带单元BBU发送的子帧配比信息；
    所述OLT根据接收到的子帧配比信息，计算用于光网络单元ONU注册的时隙；
    所述OLT根据所述计算的时隙，启动所述ONU的注册。
  10. 根据权利要求8所述的注册方法，其特征在于，所述OLT根据接收到的子帧配比信息，计算用于ONU注册的时隙具体包括：
    所述OLT计算所述子帧配比信息中下行子帧的配比信息对应的时隙；
    所述OLT选择所述计算的时隙作为用于ONU注册的时隙。
  11. 一种注册方法，应用于移动承载系统的网络侧设备，其特征在于，所述网络侧设备包括：云端控制器、基带单元BBU和与所述BBU连接的光线路终端OLT，所述方法包括：
    所述云端控制器确定ONU的注册起始时间；
    所述云端控制器根据所述ONU注册起始时间暂停分配带宽资源给用户设备。
    所述云端控制器根据所述ONU注册起始时间指示OLT完成ONU的注册。
  12. 根据权利要求11所述的注册方法，其特征在于，所述云端控制器确定ONU的注册起始时间具体包括：
    所述云端控制器接收包括用于ONU注册所需的静默窗口大小的启动ONU注册的指令，根据所述ONU的注册指令中的用于ONU注册所需的静默窗口大小，确定所述ONU的注册起始时间。
  13. 一种网络侧设备，其特征在于，所述网络侧设备包括：
    收发器，用于发送光网络单元ONU注册请求消息给基带单元BBU；接收所述BBU的响应消息；
    处理器，用于在所述收发器接收到BBU的响应消息后，启动所述ONU的注册。
  14. 根据权利要求13所述的网络侧设备，其特征在于，所述注册请求包括：用于ONU注册所需的静默窗口大小。
  15. 根据权利要求13所述的网络侧设备，其特征在于，所述BBU的响应消息包括：所述BBU确定的ONU注册响应标识，其中，所述ONU注册响应标识用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
  16. 根据权利要求13所述的网络侧设备，其特征在于，所述收发器，还用于发送ONU注册完成消息给所述BBU。
  17. 一种网络侧设备，其特征在于，所述网络侧设备包括：
    收发器，用于接收所述OLT发送的注册请求消息；
    控制器，用于根据所述注册请求消息，暂停分配带宽资源给用户设备。
  18. 根据权利要求17的网络侧设备，其特征在于，所述注册请求消息包括：用于ONU注册所需的静默窗口大小。
  19. 根据权利要求17的网络侧设备，其特征在于，所述控制器，还用于根据用于ONU注册所需的静默窗口大小，确定ONU的注册起始时间；
    所述收发器，还用于将所述确定的ONU注册起始时间发送给所述OLT。
  20. 根据权利要求17的网络侧设备，其特征在于，所述收发器，还用于发送BBU确定的ONU注册响应标识给所述OLT；其中，所述ONU注册响应标识用于标记OLT接收到ONU注册响应消息后是否可以进行ONU注册。
  21. 一种网络侧设备，其特征在于，所述网络侧设备包括：
    收发器，用于接收基带单元BBU发送的子帧配比信息；
    控制器，用于根据接收到的子帧配比信息，计算用于光网络单元ONU注册的时隙；根据所述计算的时隙，启动所述ONU的注册。
  22. 根据权利要求所述的网络侧设备，其特征在于，所述控制器，具体用于计算所述子帧配比信息中下行子帧的配比信息对应的时隙，选择所述计算的时隙作为用于ONU注册的时隙。
  23. 一种网络侧设备，其特征在于，所述网络侧设备包括：
    计算单元，用于确定ONU的注册起始时间；
    处理单元，用于根据所述ONU的注册起始时间，暂停分配带宽资源给用户设备。
  24. 根据权利要求23所述的网络侧设备，其特征在于，所述计算单元，具体用于接收启动ONU注册的指令，所述启动ONU注册的指令包括：ONU注册周期和用于ONU注册所需的静默窗口大小；根据所述ONU的注册指令中的ONU注册周期和用于ONU注册所需的静默窗口大小，确定所述ONU的注册起始时间。
  25. 一种数据通信系统，其特征在于，所述系统包括：基带单元BBU和射频拉远单元RRU，与所述BBU连接的光线路终端OLT，与所述RRU连接的光网络单元ONU，所述OLT与各个所述ONU之间通过光分配网络ODN相连；所述OLT包括如权利要求13-16所述的网络侧设备和所述BBU包括如权利要求 17-20所述的网络侧设备；或者，所述OLT包括如权利要求21-22所述的网络侧设备和所述BBU包括如权利要求23-24所述的网络侧设备。
  26. 一种数据通信系统，其特征在于，所述系统包括：云端控制器，基带单元BBU和射频拉远单元RRU，与所述BBU连接的光线路终端OLT，与所述RRU连接的光网络单元ONU，所述OLT与各个所述ONU之间通过光分配网络ODN相连；
    所述云端控制器，用于确定ONU的注册起始时间；根据所述ONU注册起始时间，暂停给所述BBU下的UE分配带宽资源和给所述OLT下的ONU分配带宽，指示所述OLT启动ONU注册；
    所述OLT根据云端控制器指示，完成ONU注册。
PCT/CN2016/111931 2016-12-24 2016-12-24 数据通信系统、光线路终端及基带单元 WO2018112981A1 (zh)

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