WO2020169031A1 - 数据传输方法、装置、ap、onu pon、组网及存储介质 - Google Patents

数据传输方法、装置、ap、onu pon、组网及存储介质 Download PDF

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Publication number
WO2020169031A1
WO2020169031A1 PCT/CN2020/075752 CN2020075752W WO2020169031A1 WO 2020169031 A1 WO2020169031 A1 WO 2020169031A1 CN 2020075752 W CN2020075752 W CN 2020075752W WO 2020169031 A1 WO2020169031 A1 WO 2020169031A1
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Prior art keywords
signaling
data
pon
olt
sta
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English (en)
French (fr)
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张宏熙
李明生
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ZTE Corp
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ZTE Corp
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Priority to US17/432,337 priority Critical patent/US11743622B2/en
Priority to EP20758432.7A priority patent/EP3920493A4/en
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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
    • H04B10/272—Star-type networks or tree-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
    • H04L47/724—Admission control; Resource allocation using reservation actions during connection setup at intermediate nodes, e.g. resource reservation protocol [RSVP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation
    • 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
    • H04Q2011/0088—Signalling aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present disclosure relates to the field of data transmission, and in particular to a data transmission method, device, wireless access point AP, passive optical network module ONU PON of an optical network unit, WLAN network and PON network networking and storage media.
  • WLAN Wireless Local Area Network
  • PON Passive Optical Network
  • This kind of networking mainly includes two forms: 1. Provide WLAN interface on ONU equipment of PON network, provide wireless access point (Access Point, AP) function, WLAN station (Station, STA) equipment can pass WLAN and PON Connect the network to the uplink network; 2. Connect a switch or router to the optical network unit (ONU) device interface (wired Ethernet interface) of the PON network, and the switch or router provides a WLAN interface for STA access Join the Shanghai Union Network.
  • AP wireless access point
  • STA Wireless Optical Network
  • the requirements of data services for latency are gradually increasing, especially with the continuous development of Internet games and augmented reality (AR) and virtual reality (VR) technologies.
  • AR augmented reality
  • VR virtual reality
  • the uplink delay of the optical line terminal (OLT) uplink interface from the STA to the PON network may reach more than 100ms, which will affect delay-sensitive services. Big.
  • the present disclosure provides a data transmission method, a device, a wireless access point AP, a passive optical network module ONU PON, a WLAN network, and a PON network and a storage medium that can effectively reduce the time delay.
  • a data transmission method including: sending a notification signaling carrying data packet information to a passive optical network module ONU PON of an optical network unit based on a request for sending a data from a station STA, and the notification signaling is used for the
  • the ONU PON applies for corresponding bandwidth from the optical line terminal OLT based on the data packet information; receives the service data sent by the STA and forwards it to the ONU PON, and the service data is used to forward the service data to the OLT according to the corresponding bandwidth.
  • a data transmission method including: receiving notification signaling carrying data packet information sent by a wireless access point AP, and sending bandwidth request signaling to an optical line terminal OLT according to the notification signaling, the bandwidth request The signaling is used for the OLT to allocate corresponding bandwidth matching the data packet information.
  • a data transmission device which includes a notification signaling module and a data forwarding module.
  • the notification signaling module is used to send data to the passive optical network module ONU PON of the optical network unit based on a data request sent by a station STA.
  • There is notification signaling of data packet information the notification signaling is used by the ONU PON to apply for the corresponding bandwidth from the optical line terminal OLT based on the data packet information;
  • the data forwarding module is used to receive the service sent by the STA The data is forwarded to the ONU PON, and the service data is used to forward to the OLT according to the corresponding bandwidth.
  • a wireless access point AP including a processor and a memory for storing a computer program that can run on the processor; wherein, when the processor is used to run the computer program, any The data transmission method applied to the AP described in the embodiment.
  • a data transmission device which includes a bandwidth application module for receiving notification signaling carrying data packet information sent by a wireless access point AP, and sending bandwidth application signaling to an optical line terminal OLT according to the notification signaling
  • the bandwidth request signaling is used by the OLT to allocate corresponding bandwidth matching the data packet information.
  • a passive optical network module ONU PON of an optical network unit which includes a processor and a memory for storing a computer program that can run on the processor; wherein, when the processor is used to run the computer program, Perform the data transmission method applied to ONU PON described in any embodiment of this application.
  • a WLAN and PON network networking is also provided, including the wireless access point AP provided in any embodiment of the present application and the passive optical network module ONU PON of the optical network unit provided in any embodiment of the present application; or It includes the data transmission device applied to AP provided in any embodiment of this application and the data transmission device applied to ONU PON provided in any embodiment of this application.
  • a storage medium is also provided, and executable instructions are stored in the storage medium.
  • executable instructions are executed by a processor, the data transmission method according to any embodiment of the present application is implemented.
  • the data transmission method, device, wireless access point AP, passive optical network module ONU PON, WLAN network and PON network and storage medium of the optical network unit provided in the present disclosure AP directly sends data request to ONU PON based on STA Send notification signaling carrying data packet information, so that the ONU PON can apply for the corresponding bandwidth from the OLT in advance based on the data packet information carried in the notification signaling before receiving the data packet. In this way, the ONU PON can apply in advance and be transmitted
  • the corresponding bandwidth of the business has good compatibility with network equipment, which can effectively reduce the delay of business data from the STA to the OLT of the PON network under the premise of controlling the cost to the greatest extent.
  • Figure 1 is a schematic diagram of a data transmission method based on WLAN and PON network networking
  • FIG. 2 is a schematic diagram of the architecture of a WLAN network and a PON network in an embodiment of the application;
  • FIG. 3 is a schematic diagram of the structure of a WLAN network and a PON network in another embodiment of the application;
  • FIG. 4 is a schematic flowchart of a data transmission method based on WLAN and PON network networking in an embodiment of the application;
  • FIG. 5 is a schematic diagram of the time point when the AP sends Inform signaling to the ONU PON in an embodiment of the application;
  • FIG. 6 is a schematic flowchart of a data transmission method in another embodiment of this application.
  • FIG. 7 is a schematic diagram of the state of ONU PON in an embodiment of the application.
  • FIG. 8 is a schematic diagram of a data transmission method based on WLAN and PON network networking in an embodiment of the application.
  • FIG. 9 is a schematic diagram of ONU PON canceling bandwidth allocation in an embodiment of this application.
  • FIG. 10 is a schematic flowchart of a data transmission method corresponding to a scenario in an embodiment of the application.
  • FIG. 11 is a schematic flowchart of a data transmission method corresponding to scenario 2 in an embodiment of this application;
  • FIG. 12 is a schematic flowchart of a data transmission method corresponding to scenario 3 in an embodiment of the application.
  • FIG. 13 is a schematic flowchart of a data transmission method corresponding to scenario 4 in an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of an AP in an embodiment of this application.
  • FIG. 15 is a schematic structural diagram of an ONU PON in an embodiment of this application.
  • a station STA sends a data request signaling (Request to send) before sending uplink service data to the wireless access point AP. ,RTS) to the AP, if the AP determines that the receiver is itself, it returns data response signaling (Clear To Send, CTS), and the STA starts to send uplink service data based on the received CTS (Expected Frame transmission) . As shown in Figure 1, the moment when RTS reaches AP is t0. If the AP confirms to receive at this time, it will return CTS to the STA.
  • CTS data response signaling
  • the data frame sent by the STA will be received (indicated by the bold arrow in Figure 1), and then the data frame will be forwarded to the ONU PON network processing unit, namely ONU PON.
  • ONU PON confirms the length of the data frame at time t1, and then applies for bandwidth by sending report signaling (report) to the optical line terminal OLT.
  • the OLT calculates the result of the Dynamic Bandwidth Allocation (DBA) module and sends the result to the ONU PON through grant signaling (Grant), and then the ONU PON forwards the data frame to the OLT according to the time slice allocated by the OLT.
  • DBA Dynamic Bandwidth Allocation
  • the OLT can be connected to multiple ONUs and PONs to implement corresponding bandwidth allocation.
  • Figure 2 is a schematic diagram of the WLAN and PON network architecture provided by an embodiment of the application.
  • the ONU PON and AP jointly form an integrated ONU device, and the ONU device provides a WLAN interface to provide AP functions.
  • WLAN STA devices can access the uplink network via the WLAN network and the PON network.
  • Figure 3 is a schematic diagram of the WLAN and PON network architecture provided by another embodiment of this application, where the ONU PON and AP are formed as independent separate devices, and the ONU PON is connected to the AP device through a wired Ethernet interface , Such as switches and routers, provide WLAN interfaces on switches and routers for STA devices to access the uplink network.
  • the AP receives the RTS signaling, once it confirms that the receiver is the AP, it can send a notification signaling (Inform) to the ONU PON in advance, and the notification signaling carries data Package information.
  • the ONU PON can receive the notification signaling in advance, know the length of the data frame based on the notification signaling, and then send the bandwidth request signaling corresponding to the data packet to the OLT. Based on this, before the data packet reaches the ONU PON, the ONU PON sends the bandwidth application signaling corresponding to the data packet to the OLT in advance, so as to effectively reduce the time delay.
  • a data transmission method provided by an embodiment of this application can be applied to the AP shown in FIG. 2 or FIG. 3.
  • the method includes the following steps:
  • Step 101 Based on the data transmission request of the station STA, a notification signaling carrying data packet information is sent to the passive optical network ONU PON of the optical network unit, and the notification signaling is used by the ONU PON based on the data packet information Apply for the corresponding bandwidth from the optical line terminal OLT.
  • the STA Before the STA sends uplink service data to the AP, it will first send the data request signaling RTS.
  • the AP acquiring the STA's data sending request may refer to the RTS sent by the STA received by the AP, or may also refer to other methods such as collecting the STA's data sending request by the AP in a polling manner.
  • the AP receives the RTS signaling sent by the STA, and the AP sends the notification signaling carrying the data packet information to the ONU PON based on the received RTS signaling sent by the STA for the The ONU PON applies for corresponding bandwidth from the OLT based on the packet information carried in the notification signaling.
  • the AP sends the notification signaling carrying the data packet information to the ONU PON, which can mean that after the AP receives the RTS sent by the STA, it sends the data carrying data to the ONU PON according to the set time point according to the RTS
  • the notification signaling of the packet information or it means that after the AP collects the data transmission request of the STA by polling or other methods, it sends the notification signaling carrying the data packet information to the ONU PON according to the collected data transmission request at the set time point ,
  • the set time point can be any of the following: time point 1, the AP receives the RTS within the specified time, time point 2, and the AP returns the CTS to the STA based on the RTS, time point 3.
  • the AP collects the STA's sending data request and other methods based on polling, it receives the expected frame transmission instruction at the same time.
  • the AP sends a notification signaling carrying data packet information to the ONU PON based on the STA’s request for sending data.
  • the ONU PON can apply to the OLT in advance for the corresponding data packet information before receiving the upstream service data. Bandwidth, therefore, through the effective coordination of the PON network and the WLAN network, the uplink transmission delay can be effectively reduced.
  • Step 103 Receive service data sent by the STA and forward it to the ONU PON, where the service data is used to forward to the OLT according to the corresponding bandwidth.
  • the OLT After the OLT receives the bandwidth request signaling sent by the ONU PON, it allocates the corresponding bandwidth to the AP corresponding to the ONU PON. After the AP receives the service data sent by the STA and forwards the ONU PON, the corresponding service data can be passed directly The allocated corresponding bandwidth is forwarded to the OLT, thereby reducing the upstream delay of the service data from the STA to the uplink interface of the OLT of the PON network.
  • the AP directly sends the notification signaling carrying the data packet information to the ONU PON based on the STA's data transmission request, so that the ONU PON can be based on the data carried in the notification signaling in advance before receiving the data packet.
  • the packet information applies to the OLT for the corresponding bandwidth.
  • the ONU PON can apply for the bandwidth corresponding to the service to be transmitted in advance, which has good compatibility with network equipment, and can effectively reduce the service data from the maximum cost control.
  • the delay from the STA to the OLT of the PON network is not limited to the STA.
  • the corresponding bandwidth refers to a fixed bandwidth.
  • the OLT receives the ONU PON bandwidth application signaling, it allocates the corresponding fixed bandwidth to the AP corresponding to the ONU PON, which can further effectively reduce the delay of subsequent upstream service data. In this way, when the subsequent WLAN has continuous upload service data At the same time, there is no need to apply for bandwidth every time, and the uplink bandwidth can be obtained for a long time through the allocated fixed bandwidth.
  • the sending of notification signaling carrying data packet information to the ONU PON based on the STA-based data sending request includes:
  • the notification signaling carrying the data packet information is sent to the ONU PON within a predetermined time according to the RTS.
  • the AP After the AP receives the RTS sent by the STA, it confirms whether the receiver of the RTS is an AP. After confirming that the receiver is an AP, it returns CTS signaling to the STA and sends the packet information to the ONU PON. Steps to notify signaling.
  • the prescribed time is usually an integer multiple of a short interframe space (Short Interframe Space, SISF).
  • SIFS Short Interframe Space
  • SIFS can be used in high-priority scenarios, such as between RTS and CTS, to ensure the atomicity of data transmission.
  • the prescribed time is usually a SISF .
  • the time point at which the AP sends the notification signaling carrying packet information to the ONU PON within the specified time according to the RTS can be time point 1, that is, the AP receives the RTS sent by the STA and determines that the receiver is After the AP, after an interval of one SISF, it sends a notification signal carrying data packet information to the ONU PON.
  • the sending of notification signaling carrying data packet information to the ONU PON based on the STA-based data sending request includes:
  • the STA When receiving the RTS sent by the STA and determining that the receiver of the RTS is an AP, it returns a data response signaling CTS according to the RTS and at the same time sends a notification signaling carrying data packet information to the ONU PON.
  • the AP After the AP receives the RTS sent by the STA, it confirms whether the receiver of the RTS is an AP. After confirming that the receiver is an AP, it returns CTS signaling to the STA and sends the packet information to the ONU PON. Steps to notify signaling. Wherein, according to the RTS, the CTS is returned and the notification signaling carrying the data packet information is sent to the ONU PON at the same time, so that the ONU PON can apply to the OLT based on the data packet information carried in the notification signaling before receiving the data packet. The corresponding bandwidth corresponding to the data packet information.
  • the AP In order to minimize the delay, after the AP receives the RTS sent by the STA and determines that the receiver is the AP, it should send the notification signaling carrying the packet information to the ONU PON as early as possible.
  • the AP should return the CTS to the STA at the same time Immediately send a notification signaling to ONU PON, and the time for AP to return CTS to STA to further receive the upstream service data sent by STA is parallel with the time for ONU PON to apply for corresponding bandwidth based on AP notification signaling to OLT to achieve compressed uplink The purpose of data transmission delay.
  • the time point at which the AP returns to the CTS according to the RTS and sends notification signaling carrying packet information to the ONU PON at the same time may refer to time point 2, that is, the AP receives the RTS sent by the STA and determines After the receiver is the AP, it returns the CTS to the STA and sends the notification signaling carrying the data packet information to the ONU PON.
  • the sending of notification signaling carrying data packet information to the ONU PON based on the STA-based data sending request includes:
  • the notification signaling carrying the data packet information is sent to the ONU PON based on the expected frame transmission instruction.
  • the AP can also obtain the data sending request of the STA in other ways. For example, the AP collects the data sending request of the STA in a polling manner. After the AP collects the data sending request of the STA, the AP starts to perform the uplink service data sent by the STA. Before receiving, the AP will respond to the service data sent by the STA to form an expected frame transmission command, that is, the AP notifies the software to start receiving the service data command sent by the STA, and the AP sends the data packet information to the ONU PON based on the expected frame transmission command Before receiving the data packet, the ONU PON can apply to the OLT for the corresponding bandwidth corresponding to the data packet information based on the data packet information carried in the notification signaling.
  • the AP In order to minimize the time delay, after the AP collects the STA's request for sending data, it should send the notification signaling carrying the data packet information to the ONU PON as soon as possible.
  • the AP actually receives the uplink service sent by the STA. Before the data, based on the expected frame transmission command, send a notification signaling carrying data packet information to ONU PON, and the time when the AP receives the uplink service data sent by the STA and the time when the ONU PON applies for the corresponding bandwidth from the OLT based on the AP notification signaling Parallel, can also achieve the purpose of compressing the uplink data transmission delay.
  • the time point at which the notification signaling carrying the data packet information is sent to the ONU PON based on the expected frame transmission instruction can refer to time point 3, that is
  • the AP collects the STA's request for sending data through polling or other methods when the STA starts to transmit uplink service data to the AP, the AP will respond to the service data sent by the STA to form an expected frame transmission instruction to start receiving uplink service data from the STA , AP sends notification signaling carrying data packet information to ONU PON based on the expected frame transmission instruction.
  • the AP sends the notification signaling carrying data packet information to the ONU PON as soon as possible, as shown in Figure 5.
  • the time point when the AP sends notification signaling to the ONU PON can be at time point 1, time 2, or time point 3.
  • time point 1 and time point 2 are compressed before the STA prepares to send uplink service data to the AP
  • the delay effect is relatively better; for the scenario where the RTS and CTS signaling interactions between the STA and the AP are all handled by hardware, the AP can also be based on expectations when the STA starts to send uplink service data to the AP.
  • the frame transmission instruction sends a notification signaling carrying data packet information to the ONU PON, that is, it is sent at the time point 3 shown in the figure.
  • the knowledge of time point 3 does not need to improve the network equipment, so that the compatibility is better.
  • the method before the sending notification signaling carrying data packet information to the ONU PON, the method includes:
  • the data packet information is determined according to the NAV information of the network allocation vector carried in the RTS.
  • data packet information refers to data packet length information.
  • Network Allocation Vector (NAV) information refers to the time required to occupy the wireless medium to send data.
  • the RTS signaling carries NAV information.
  • the AP can obtain the length of the data packet to be sent according to the NAV signaling in the RTS signaling, so as to form a notification command carrying the packet length information and send it to the ONU PON, so that the ONU The PON can learn the notification instruction in time and apply for the corresponding bandwidth from the OLT based on the packet length information.
  • the method before sending the notification signaling carrying data packet information to the ONU PON, the method includes:
  • the RTS and the set STA attribute information determine whether the STA is a delay-sensitive STA of a specified type.
  • the upstream service data can be deployed in two modes: single service and multi-service.
  • the single service mode means that there is only one low-latency WLAN service on the ONU, or there may be other Non-WLAN services, but different services are adapted to different bandwidth units (T-CONT) of the PON network for transmission.
  • the multi-service mode means that in addition to the low-latency WLAN services on the ONU, there are other delay-insensitive WLAN services.
  • Different services are adapted to different T-CONs of the PON network for transmission.
  • different services can be distinguished according to different STA attributes, such as STA addresses, and the set STA attributes may refer to STA attribute information obtained through preset settings.
  • the AP After the AP receives the RTS, it will confirm whether the receiving end is an AP, and determine whether the STA is a delay-sensitive STA of the specified type, that is, whether the RTS is sent by a delay-sensitive STA; if If the receiving end is an AP and a specified type of delay-sensitive STA, it will send a notification signal carrying packet information to the ONU PON; if the receiving end is not an AP, or the source is not a specified type of delay-sensitive STA, Then, the notification signaling carrying the data packet information is not sent to the ONU PON, and the subsequent service data transmission can be forwarded using the data transmission method shown in FIG. 1.
  • FIG. 6 another aspect of the embodiments of the present application also provides a data transmission method, which can be applied to the ONU PON shown in FIG. 2 or FIG. 3.
  • the method includes the following steps:
  • Step 201 Receive notification signaling carrying data packet information sent by the wireless access point AP, and send bandwidth request signaling to the optical line terminal OLT according to the notification signaling, where the bandwidth request signaling is used for allocation by the OLT The corresponding bandwidth matching the data packet information.
  • the STA sends RTS signaling before sending uplink service data to the AP.
  • the AP may collect the data sending request of the STA based on the received RTS signaling sent by the STA or other methods such as polling, and send the notification signaling carrying the data packet information to the ONU PON based on the data sending request of the STA.
  • the ONU PON receives the notification signaling carrying data packet information sent by the AP, and can send bandwidth request signaling to the OLT according to the data packet information carried in the notification signaling to obtain the OLT based on the bandwidth request signaling And the corresponding bandwidth allocated.
  • ONU PON applies to the OLT for the corresponding bandwidth based on the notification signaling that carries data packet information sent by the AP.
  • the ONU PON can be based on the data packet carried in the notification signaling before receiving the data packet.
  • the information applies for the corresponding bandwidth from the OLT.
  • the time for the ONU PON to apply for the bandwidth corresponding to the service data to be transmitted from the OLT, and the time for the service data to be transmitted to be transmitted from the STA to the ONU PON are implemented in parallel.
  • the corresponding bandwidth of the service to be transmitted is used for the purpose of reducing the delay.
  • the notification signaling between AP and ONU PON and the bandwidth application signaling between ONU and OLT can achieve effective coordination between PON network and WLAN network.
  • the modification of the equipment is small, so the compatibility of the network equipment is good, and the delay of the service data from the STA to the OLT of the PON network can be effectively reduced under the premise of controlling the cost to the greatest extent.
  • the method further includes:
  • the ONU PON forwards the service data according to the corresponding bandwidth allocated by the OLT according to the service data sent by the STA forwarded by the AP.
  • the OLT After the OLT receives the bandwidth request signaling sent by the ONU PON, it allocates the corresponding bandwidth to the AP corresponding to the ONU PON.
  • the AP receives the service data sent by the STA, it forwards the service data to the ONU PON, and the ONU PON receives the AP
  • the corresponding service data can be directly forwarded to the OLT through the allocated corresponding bandwidth, thereby reducing the upstream delay of the service data from the STA to the OLT's uplink interface of the PON network.
  • the sending bandwidth request signaling to the OLT according to the notification signaling includes:
  • the original signaling channel refers to the existing bandwidth application signaling transmission channel between the ONU PON and the OLT.
  • the known data transmission method based on WLAN and PON network networking is ONU PON
  • the report signaling channel between the OLT and the OLT take the broadband passive optical network (Gigabit-Capable PON, GPON)/XG-Passive Optical Network (XGPON) as an example, the original signaling channel
  • the definition can be the uplink dynamic bandwidth report (Dynamic Bandwidth Report upstream, DBRu) signaling channel defined by the broadband passive optical integrated access standard (ITU-T G.984.3/G.987.3).
  • bandwidth request signaling In order to further determine the timeliness of bandwidth request signaling transmission, redefine the signaling between ONU PON and OLT, define bandwidth request signaling as DATARequest signaling, and the priority of DATARequest signaling takes precedence over other report signaling. After receiving the DATARequest signaling, the OLT preferentially allocates the corresponding bandwidth to the service of the ONU PON to obtain the bandwidth allocated by the OLT with a higher priority.
  • the dedicated channel refers to the sending channel between the ONU PON and the OLT dedicated to transmitting the bandwidth application signaling, and the dedicated channel is usually redefined.
  • the sending bandwidth request signaling to the OLT through the designated dedicated channel according to the notification signaling includes: when the PON network is a broadband passive optical network GPON, the designated dedicated channel is the physical layer operation management and Maintenance (Physical Layer Operations, Administration and Maintenance, PLOAM) channels.
  • PLOAM Physical Layer Operations, Administration and Maintenance
  • the definition of a dedicated channel can be the PLOAM channel defined by the broadband passive optical integrated access standard (ITU-T G.984.3/G.987.3).
  • the method further includes:
  • the bandwidth cancel signaling is sent to the OLT.
  • the corresponding bandwidth allocated by the OLT to the ONU PON based on the DATARequest signaling is a fixed bandwidth. In this way, the delay of subsequent upstream service data of the STA can be effectively reduced. If the subsequent WLAN has continuous uploading service data, there is no need to renew the If you apply for bandwidth, you can get uplink bandwidth for a long time. In order to ensure the timely release of resources after the subsequent WLAN uploads of service data, when redefining the signaling between the ONU PON and the OLT, the bandwidth cancellation signaling is further increased, which is defined as DATACancel signaling.
  • the AP will send notification signaling to the ONU PON based on the RTS signaling before the STA sends service data each time.
  • the ONU PON can determine according to the received notification signaling sent by the AP Continuity of business data uploaded by WLAN.
  • the ONU PON determines that the notification signaling is not received within the set time threshold, it sends a DATACancel signaling to the OLT, and promptly informs the OLT to stop the fixed bandwidth allocation of the ONU PON related services and release bandwidth resources.
  • the determining that the notification signaling is not received within a set time threshold, sending bandwidth cancellation signaling to the OLT includes:
  • the time td parameter is further defined, and the ONU PON no data request is recorded through the td parameter time.
  • ONU PON sends bandwidth request signaling to the optical line terminal OLT according to the notification signaling and switches to the working state; starts timing in the working state, and when the notification signaling is received within the time threshold, the Clear and re-timing; when the notification signaling is not received within the time threshold, it sends bandwidth cancellation signaling to the OLT and switches from the working state to the idle state.
  • ONU PON defines the td parameter Record the continuity of the notification signaling sent by the AP, and determine that when the notification signaling is not received within the set time threshold, that is, when the td parameter exceeds the time threshold, report to the The OLT sends a DATACancel signaling to promptly notify the OLT to stop the fixed bandwidth allocation of the ONU PON related services and release bandwidth resources.
  • ONU PON includes two states: working state (WORKING) and idle state (IDLE).
  • IDLE working state
  • IDLE idle state
  • the ONU PON receives the WLAN data request (that is, the inform signaling sent by the AP), and then sends a DATARequest to the OLT, and at the same time it transitions to the WORKING state.
  • td starts timing from 0.
  • td is cleared; if no inform signaling is received for a period of time, td continues to increase, when td exceeds the predetermined threshold (for example, 1 minute) , The ONU PON sends DATACancel signaling to the OLT, and at the same time it transitions to the IDLE state.
  • the predetermined threshold for example, 1 minute
  • the AP directly sends the notification signaling carrying the data packet information to the ONU PON based on the RTS sent by the STA, so that the ONU PON can be based on the notification in advance before receiving the data packet.
  • the data packet information carried by the signaling applies to the OLT for the corresponding bandwidth.
  • the Inform signaling between the AP and the ONU PON and the DATARequest/DATACancel signaling between the ONU PON and the OLT the effective coordination of the PON network and the WLAN network is achieved.
  • ONU PON can apply in advance for the bandwidth corresponding to the service to be transmitted, and has good compatibility with network equipment. It can effectively reduce the delay of service data from the STA to the OLT of the PON network while controlling costs to the greatest extent.
  • FIG. 8 is a schematic diagram of a data transmission method based on WLAN and PON network networking provided by an embodiment of this application.
  • the STA Before sending uplink service data to the AP, the STA first sends RTS signaling to the AP.
  • the RTS signaling carries NAV (Network Allocation Vector) information, that is, the time required to send data in the wireless medium, and thus the length of the data packet to be sent can be obtained.
  • NAV Network Allocation Vector
  • ONU PON receives the Inform signaling at t1, knows the length of the data packet, and sends the DATARequest signaling corresponding to the data packet to the OLT. At this time, before the data packet reaches the ONU PON, the ONU PON has already applied to the OLT Corresponding bandwidth, so as to achieve the purpose of compressing t1-t0 time.
  • the OLT After the OLT receives the ONU's request for bandwidth signaling, it can allocate a fixed bandwidth to the AP service corresponding to the ONU PON to effectively reduce the time for subsequent upstream service data.
  • the bold arrow indicates the data packets continuously uploaded by the WLAN
  • the upstream bandwidth can be obtained for a long time.
  • DATACancel signaling is further added, and the td parameter is defined to record the ONU PON no data request time.
  • the ONU PON When the ONU PON determines that the Inform signaling is not received within the set time threshold, it sends a DATACancel signaling to the OLT, and promptly informs the OLT to send to the ONU PON the Grant (Deassign) that indicates cancellation of the allocated fixed bandwidth. ) Signaling to stop the fixed bandwidth allocation of related services of the ONU PON and release bandwidth resources.
  • Scenario 1 Take the WLAN and PON network including AP and ONU PON, and the AP and ONU PON together form a networking of ONU equipment and correspond to a single service scenario as an example.
  • the AP is built into the ONU equipment, and the AP and ONU
  • the collaboration between PONs is mainly through the software interface or hardware channel inside the ONU.
  • the single service scenario means that there is only one low-latency WLAN service on the ONU, or there may be other non-WLAN services, but the operator will adapt different services to different bandwidth units (T-CONT) at the PON layer for transmission .
  • T-CONT bandwidth units
  • Step S11 the STA sends RTS signaling to the AP.
  • Step S12 After the AP receives the RTS signaling, it determines that the receiving end is the AP, and then sends the Inform signaling to the ONU PON through the software or hardware channel inside the ONU.
  • Step S13 After the ONU PON receives the Inform signaling at time t1, it sends the DATARequest signaling to the OLT.
  • Step S14 the OLT returns Grant (Assign) signaling based on the DATARequest signaling to allocate the corresponding bandwidth.
  • Step S15 The STA sends a service message to the AP, and the AP forwards the service message to the ONU PON and forwards the service message to the uplink network port of the OLT through the ONU PON.
  • Step S16 When the ONU PON does not receive the Inform signaling within the time threshold, it sends a DATACancel signaling to the OLT.
  • Step S17 the OLT responds to the DATACancel signaling and returns Grant (Deassign) signaling to cancel the allocated corresponding bandwidth.
  • Scenario 2 Take the WLAN and PON network including AP and ONU PON, and the AP and ONU PON together form the networking of ONU equipment and correspond to a multi-service scenario as an example, where AP is built in ONU equipment, AP and ONU
  • the collaboration between PONs is mainly through the software interface or hardware channel inside the ONU.
  • the multi-service scenario means that in addition to the low-latency WLAN services on the ONU, there are other delay-insensitive WLAN services. Different services can be distinguished based on different STA addresses. Operators will adapt different services on the same ONU to different bandwidth units (T-CONT) on the PON layer for transmission.
  • T-CONT bandwidth units
  • Step S21 the STA sends RTS signaling to the AP.
  • Step S22 After receiving the RTS signaling, the AP judges whether the receiving end and the RTS are sent from a delay-sensitive STA.
  • Step S23 When it is determined that the receiving end is an AP and the source is a delay-sensitive STA, the ONU internal software or hardware channel sends Inform signaling to the ONU PON, and steps S25 to S29 are executed.
  • Step S24 When it is determined that the receiving end is an AP and the source is determined to be a delay-sensitive STA, perform uplink service transmission according to a known data transmission method; wherein, the known data transmission method may be as shown in FIG. 1 A data transmission method based on WLAN and PON network networking.
  • Step S25 After receiving the Inform signaling at time t1, the ONU PON sends DATARequest signaling to the OLT.
  • Step S26 the OLT returns Grant (Assign) signaling based on the DATARequest signaling to allocate the corresponding bandwidth.
  • Step S27 The STA sends a service message to the AP, and the AP forwards the service message to the ONU PON and forwards the service message to the uplink network port of the OLT through the ONU PON.
  • Step S28 When the ONU PON does not receive the Inform signaling within the time threshold, it sends a DATACancel signaling to the OLT.
  • Step S29 the OLT returns Grant (Deassign) signaling in response to the DATACancel signaling to cancel the allocated corresponding bandwidth.
  • Scenario 3 Take the WLAN and PON network including AP and ONU PON, and the AP and ONU PON are connected through an Ethernet interface and correspond to a single service scenario as an example, where AP and ONUPON are formed as separate independent devices, AP
  • the collaboration with ONU PON needs to rely on the definition of protocol interface between ONU and switch or router.
  • the protocol interface meets the requirements of fast sending and receiving, and the requirements of high priority in transmission, that is, the forwarding priority is higher than that of non-real-time services, or use Dedicated hardware channel transmission.
  • the protocol interface needs to add a connection-based interaction mechanism to determine the priority and protection mechanism of forwarding.
  • the single service scenario means that there is only one low-latency WLAN service on the ONU, or there may be other non-WLAN services, but the operator will adapt different services to different bandwidth units (T-CONT) at the PON layer for transmission .
  • T-CONT bandwidth units
  • Step S31 the STA sends RTS signaling to the AP.
  • step S32 after the AP receives the RTS signaling, it determines that the receiving end is the AP, and then sends the Inform signaling to the ONU PON through the protocol interface between the ONU and the switch or router.
  • Step S33 After the ONU PON receives the Inform signaling at time t1, it sends the DATARequest signaling to the OLT.
  • Step S34 the OLT returns Grant (Assign) signaling based on the DATARequest signaling to allocate the corresponding bandwidth.
  • step S35 the STA sends a service message to the AP, and the AP forwards the service message to the ONU PON and forwards the service message to the uplink network port of the OLT through the ONU PON.
  • Step S36 When the ONU PON does not receive the Inform signaling within the time threshold, it sends a DATACancel signaling to the OLT.
  • step S37 the OLT returns Grant (Deassign) signaling in response to the DATACancel signaling to cancel the allocated corresponding bandwidth.
  • Scenario 4 Take the WLAN and PON network including AP and ONU PON, and the AP and ONU PON are connected through an Ethernet interface and correspond to a multi-service scenario as an example, where AP and ONU PON are formed as separate independent devices.
  • the coordination of AP and ONU PON needs to rely on the definition of a protocol interface between the ONU and the switch or router.
  • the protocol interface meets the requirements of fast transmission and reception, and meets the requirements of high priority in transmission, that is, the forwarding priority is higher than that of non-real-time services, or Use dedicated hardware channel for transmission.
  • the protocol interface needs to add a connection-based interaction mechanism to determine the priority and protection mechanism of forwarding.
  • the multi-service scenario means that in addition to the low-latency WLAN services on the ONU, there are other delay-insensitive WLAN services. Different services can be distinguished based on different STA addresses. Operators will adapt different services on the same ONU to different bandwidth units (T-CONT) on the PON layer for transmission.
  • T-CONT bandwidth units
  • Step S41 the STA sends RTS signaling to the AP.
  • Step S42 After receiving the RTS signaling, the AP judges whether the receiving end and the RTS are sent from a delay-sensitive STA.
  • Step S43 When it is determined that the receiving end is an AP and the source is a delay-sensitive STA, the ONU PON signaling is sent through the protocol interface between the ONU and the switch or router, and steps S45 to S49 are performed.
  • Step S44 When it is determined that the receiving end is an AP and the source is determined to be a non-delay-sensitive STA, perform uplink service transmission according to a known data transmission method; wherein, the known data transmission method may be as shown in FIG. 1 A data transmission method based on WLAN and PON network networking.
  • Step S45 After the ONU PON receives the Inform signaling at time t1, it sends the DATARequest signaling to the OLT.
  • Step S46 the OLT returns Grant (Assign) signaling based on the DATARequest signaling to allocate the corresponding bandwidth.
  • Step S47 The STA sends a service message to the AP, and the AP forwards the service message to the ONU PON and forwards the service message to the uplink network port of the OLT through the ONU PON.
  • Step S48 When the ONU PON does not receive the Inform signaling within the time threshold, it sends a DATACancel signaling to the OLT.
  • Step S49 the OLT returns Grant (Deassign) signaling in response to the DATACancel signaling to cancel the allocated corresponding bandwidth.
  • FIG. 14 another aspect of the embodiment of the present application provides a data transmission device, including a notification signaling module 11 and a data forwarding module 13, which can be applied to the AP shown in FIG. 2 or FIG.
  • the command module 11 is used to send notification signaling carrying data packet information to the passive optical network module ONU PON of the optical network unit based on the data transmission request of the station STA.
  • the data packet information applies to the optical line terminal OLT for the corresponding bandwidth;
  • the data forwarding module 13 is used to receive the service data sent by the STA and forward it to the ONU PON, and the service data is used to send the service data to the OLT according to the corresponding bandwidth.
  • the OLT forwards.
  • the notification signaling module 11 is specifically used to receive the RTS sent by the STA, and when it is determined that the receiver of the RTS is the wireless access point AP, the RTS is sent to the ONU PON within a predetermined time according to the RTS. There is notification signaling of packet information.
  • the prescribed time is an integer multiple of the short inter-frame interval time SISF.
  • the notification signaling module 11 is specifically configured to receive the data request signaling RTS sent by the station STA, and when it is determined that the receiver of the RTS is the wireless access point AP, it returns a data response according to the RTS
  • the signaling CTS also sends notification signaling carrying data packet information to the passive optical network ONU PON.
  • the notification signaling module 11 is specifically configured to collect the data sending request of the STA based on the polling method, and then send the notification signaling carrying the data packet information to the ONU PON based on the expected frame transmission instruction.
  • the notification signaling module 11 is further configured to determine data packet information according to the network allocation vector NAV information carried in the RTS.
  • the notification signaling module 11 is further configured to determine whether the STA is a delay-sensitive STA of a specified type according to the RTS and the set STA attribute information.
  • the data transmission device When the data transmission device provided in the above embodiment implements the data transmission method, only the division of the above-mentioned program modules is used as an example. In practical applications, the above-mentioned steps can be allocated to different program modules as required, that is, The internal structure of the program for the data transmission device to implement the data transmission method is divided into different program modules to complete all or part of the processing described above.
  • the data transmission device may be an AP that implements the data transmission method applied to the AP. For the specific implementation process, please refer to the method embodiment, which will not be repeated here.
  • the AP includes a processor 14 and a storage medium 15 for storing a computer program that can run on the processor 14, wherein the processing
  • the device 14 is used to execute the steps of the data transmission method applied to the AP provided in any embodiment of the present application when running the computer program.
  • the processor 14 and the storage medium 15 do not mean that the corresponding number is one, but may be one or more.
  • the storage medium 15 may store a data transmission device based on WLAN and PON network networking applied to the AP provided in the embodiment of the present invention.
  • the processor 14 is used to improve calculation and control capabilities and support the entire AP. run.
  • FIG. 15 another aspect of the embodiment of the present application provides a data transmission device, which can be applied to the ONU PON shown in FIG. 2 or FIG. 3.
  • the device includes a bandwidth application module 21 for receiving wireless access
  • the notification signaling carrying data packet information sent by the point AP sends bandwidth request signaling to the optical line terminal OLT according to the notification signaling, and the bandwidth request signaling is used by the OLT to allocate and match the data packet information The corresponding bandwidth.
  • the device further includes a service data module 23, configured to receive service data sent by the corresponding station STA forwarded by the AP, and forward the service data according to the corresponding bandwidth allocated by the OLT.
  • a service data module 23 configured to receive service data sent by the corresponding station STA forwarded by the AP, and forward the service data according to the corresponding bandwidth allocated by the OLT.
  • the bandwidth request module 21 is specifically configured to send bandwidth request signaling to the OLT through the original signaling channel according to the notification signaling, where the bandwidth request signaling is in the signaling source.
  • the priority sent in a channel is higher than other signaling; or, according to the notification signaling, the bandwidth request signaling is sent to the OLT through a designated dedicated channel.
  • the designated dedicated channel is a physical layer operation management and maintenance PLOAM channel.
  • the device further includes a bandwidth cancellation module 26, configured to send bandwidth cancellation signaling to the OLT when the notification signaling is not received within a set time threshold.
  • the bandwidth canceling module 26 includes a state switching unit 261 and a timing unit 262.
  • the state switching unit 261 is configured to switch to the working state after sending bandwidth request signaling to the OLT according to the notification signaling.
  • the timing unit 262 is used to start timing in the working state, and when the notification signaling is received within the time threshold, the timing is cleared and timed again; the state switching unit is also used When the notification signaling is not received within the time threshold, sending bandwidth cancellation signaling to the OLT and switching from the working state to the idle state.
  • the data transmission device may be an ONU PON that implements the data transmission method applied to the ONU PON.
  • the specific implementation process please refer to the method embodiment, which will not be repeated here.
  • the ONU PON includes a processor 24 and a storage medium 25 for storing a computer program that can run on the processor 24, wherein:
  • the processor 24 is configured to execute the steps of the data transmission method provided in any embodiment of the present application when running the computer program.
  • the processor 24 and the storage medium 25 do not mean that the corresponding number is one, but may be one or more.
  • the storage medium 25 may store a data transmission device used to implement the ONU PON provided by the embodiment of the present invention, and the processor 24 is used to improve calculation and control capabilities and support the operation of the entire ONU PON.
  • the embodiments of the present invention also provide a storage medium, for example, including a memory storing a computer program, which can be executed by a processor to complete the steps of the data transmission method provided by any embodiment of the present invention .
  • the storage medium can be Ferroelectric Random Access Memory (FRAM), Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), erasable programmable Read-only memory (Erasable Programmable Read-Only Memory, EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), flash memory (Flash Memory), magnetic surface memory, optical disk, or portable compact disk read-only Memory (Compact Disc Read Only Memory, CD-ROM) and other memories; it can also be a variety of devices including one or any combination of the foregoing memories.
  • FRAM Ferroelectric Random Access Memory
  • ROM Read-Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrically Erasable Programmable

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Abstract

本发明实施例公开一种数据传输方法、装置、无线接入点AP、光网络单元的无源光网络模块ONU PON、WLAN和PON网络组网及存储介质，该方法包括：基于站点STA的发送数据请求，向无源光网络ONU PON发送携带有数据包信息的通知信令，所述通知信令用于所述ONU PON基于所述数据包信息向光线路终端OLT申请相应带宽；接收所述STA发送的业务数据并转发给所述ONU PON，所述业务数据用于根据所述相应带宽向所述OLT转发。

Description

数据传输方法、装置、AP、ONU PON、组网及存储介质
本申请要求在2019年02月19日提交中国专利局、申请号为201910123729.0的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本公开涉及数据传输领域，尤其涉及一种数据传输方法、装置、无线接入点AP、光网络单元的无源光网络模块ONU PON、WLAN网络和PON网络组网及存储介质。
背景技术
在数据接入网络中，无线局域网(Wireless Local Area Network，WLAN)和无源光网络(Passive Optical Network，PON)网络混合组网是一个非常主要的应用。这种组网主要包括两种形式：1、在PON网络的ONU设备上提供WLAN接口，提供无线接入点(Access Point，AP)功能，WLAN的站点(Station，STA)设备可以经由WLAN和PON网络接入上联网络；2、在PON网络的光网络单元(Optical Network Unit，ONU)设备接口(有线以太网接口)下挂接交换机或路由器，该交换机或路由器上提供WLAN接口，供STA接入上联网络。
随着网络业务的发展，数据业务对时延的要求逐渐提高，尤其是随着互联网游戏及增强现实技术(Augmented Reality，AR)、虚拟现实技术(Virtual Reality，VR)技术的不断发展，时延成为网络的一个瓶颈。针对WLAN和PON网络混合组网，一般情况下，从STA到PON网络的光线路终端(Optical Line Terminal，OLT)上联接口的上行时延可能达到100ms以上，从而对于时延敏感的业务影响会很大。
发明内容
本公开提供一种能够有效减小时延的数据传输方法、装置、无线接入点AP、光网络单元的无源光网络模块ONU PON、WLAN网络和PON网络组网及存储介质。
提供了一种数据传输方法，包括：基于站点STA的发送数据请求，向光网络单元的无源光网络模块ONU PON发送携带有数据包信息的通知信令，所述通知信令用于所述ONU PON基于所述数据包信息向光线路终端OLT申请相应带宽；接收所述STA发送的业务数据并转发给所述ONU PON，所述业务数据用于根据所述相应带宽向所述OLT转发。
还提供了一种数据传输方法，包括：接收无线接入点AP发送的携带有数据包信息的通知信令，根据所述通知信令向光线路终端OLT发送带宽申请信令，所述带宽申请信令用于所述OLT分配与所述数据包信息匹配的相应带宽。
还提供了一种数据传输装置，包括通知信令模块和数据转发模块，所述通知信令模块，用于基于站点STA的发送数据请求，向光网络单元的无源光网络模块ONU PON发送携带有数据包信息的通知信令，所述通知信令用于所述ONU PON基于所述数据包信息向光线路终端OLT申请相应带宽；所述数据转发模块，用于接收所述STA发送的业务数据并转发给所述ONU PON，所述业务数据用于根据所述相应带宽向所述OLT转发。
还提供了一种无线接入点AP，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器；其中，所述处理器用于运行所述计算机程序时，执行本申请中任一实施例所述的应用于AP的数据传输方法。
还提供了一种数据传输装置，包括带宽申请模块，用于接收无线接入点AP发送的携带有数据包信息的通知信令，根据所述通知信令向光线路终端OLT发送带宽申请信令，所述带宽申请信令用于所述OLT分配与所述数据包信息匹配的相应带宽。
还提供了一种光网络单元的无源光网络模块ONU PON，包括处理器和用于存储能够在处理器上运行的计算机程序的存储器；其中，所述处理器用于运行所述计算机程序时，执行本申请中任一实施例所述的应用于ONU PON的数据传输方法。
还提供了一种WLAN和PON网络组网，包括本申请任一实施例所提供的无线接入点AP以及本申请任一实施例所提供的光网络单元的无源光网络模块ONU PON；或者包括本申请任一实施例所提供的应用于AP的数据传输装置和本申请任一实施例所提供的应用于ONU PON的数据传输装置。
还提供了一种存储介质，所述存储介质中存储有可执行指令，所述可执行指令被处理器执行时实现本申请任一实施例所述的数据传输方法。
本公开提供的数据传输方法、装置、无线接入点AP、光网络单元的无源光网络模块ONU PON、WLAN网络和PON网络组网及存储介质，AP基于STA的发送数据请求直接向ONU PON发送携带有数据包信息的通知信令，以通过ONU PON在接收到数据包之前可以提前基于所述通知信令携带的数据包信息向OLT申请相应带宽，如此，ONU PON可以提前申请与待传输业务相应的带宽，对网络设备的兼容性好，从而能够在最大程度控制成本的前提下，有效地减小业务数据从STA到PON网络的OLT的时延。
附图说明
图1为基于WLAN和PON网络组网的数据传输方法的示意图；
图2为本申请一实施例中WLAN网络和PON网络组网的架构示意图；
图3为本申请另一实施例中WLAN网络和PON网络组网的架构示意图；
图4为本申请一实施例中基于WLAN和PON网络组网的数据传输方法的流程示意图；
图5为本申请一实施例中AP向ONU PON发送Inform信令的时间点的示意图；
图6为本申请另一实施例中数据传输方法的流程示意图；
图7为本申请一实施例中ONU PON的状态示意图；
图8为本申请一实施例中基于WLAN和PON网络组网的数据传输方法的示意图；
图9为本申请一实施例中ONU PON取消带宽分配的示意图；
图10为本申请一实施例中与场景一对应的数据传输方法的流程示意图；
图11为本申请一实施例中与场景二对应的数据传输方法的流程示意图；
图12为本申请一实施例中与场景三对应的数据传输方法的流程示意图；
图13为本申请一实施例中与场景四对应的数据传输方法的流程示意图；
图14为本申请一实施例中AP的结构示意图；
图15为本申请一实施例中ONU PON的结构示意图。
具体实施方式
以下结合说明书附图及具体实施例对本公开技术方案做进一步的详细阐述。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
在以下的描述中，涉及到“一些实施例”的表述，其描述了所有可能实施例的子集，但是应当理解，“一些实施例”可以是所有可能实施例的相同子集或不同子集，并且可以在不冲突的情况下相互结合。
WLAN和PON网络组网请参阅图1，根据一种基于WLAN和PON网络组网的数据传输方法，站点STA给无线接入点AP发送上行业务数据前，先发送数据请求信令(Request to send，RTS)给AP，如果AP确定接收方为自己，则返回数据响应信令(Clear To Send，CTS)，STA基于接收到的CTS之后开始发送上行业务数据(预期帧传输(Expected Frame transmission))。如图1所示，RTS到达AP的时刻是t0。如果该时刻AP确定接收，则给STA返回CTS，则在后面的时间段，会收到STA发送来的数据帧(图1中用加粗线箭头进行指示)，之后数据帧被转发到ONU的PON网络处理单元，即ONU PON。ONU PON在t1时刻确认数据帧的长度，之后向光线路终端OLT通过发送报告信令(report)申请带宽。OLT基于report信令，计算动态带宽分配(Dynamic Bandwidth Allocation，DBA)模块的结果通过授权信令(Grant)发送给ONU PON，之后ONU PON根据OLT分配的时间片向OLT转发所述数据帧。其中，如图1中右侧图列中OLT与ONU之间的斜线所示意，OLT可以是与多个ONU PON通讯连接实现对应的带宽分配。
对于WLAN和PON网络的组网，由于涉及ONU PON和AP间的以太网接口，会引入存储转发时延，尤其是该上行方向涉及WLAN的多STA调度及PON层的多ONU间调度会额外引入更多的时延，为了有效降低在WLAN和PON网络组网的情况下的上行时延，可以重点对上述的t1-t0占用时间进行优化。
请参阅图2，图2为本申请一实施例提供的WLAN和PON网络组网的架构示意图，其中，ONU PON和AP共同形成整体的ONU设备，ONU设备上提供WLAN接口，提供AP功能。WLAN的STA设备可以经由WLAN网络和PON网络接入上联网络。请参阅图3，图3为本申请另一实施例提供的WLAN和PON网络组网的架构示意图，其中，ONU PON和AP形成为独立的分离设备，ONU PON通过有线以太网接口挂接AP设备，如交换机、路由器等，通过交换机、路由器上提供WLAN接口，供STA设备接入上联网络。基于上述WLAN和PON网络组网的数据传输方法中，AP接收到RTS信令后，一旦确认接收方是AP，可以提前给ONU PON发送一个通知信令(Inform)，通过该通知信令携带数据包信息。如此，ONU PON可以提前收到通知信令，基于该通知信令知晓数据帧长度，之后把该数据包对应的带宽申请信令向OLT送出。基于此，在数据包到达ONU PON前，ONU PON就提前把与该数据包对应的带宽申请信令向OLT送出，达到有效减小时延的目的。
请参阅图4，为本申请实施例所提供的一种数据传输方法，可应用于如图2或图3中所示的AP，该方法包括如下步骤：
步骤101，基于站点STA的发送数据请求，向光网络单元的无源光网络ONU  PON发送携带有数据包信息的通知信令，所述通知信令用于所述ONU PON基于所述数据包信息向光线路终端OLT申请相应带宽。
STA向AP发送上行业务数据前，会先发送数据请求信令RTS。这里，AP获取STA的发送数据请求，可以是指AP接收到的所述STA发送的RTS，或者也可以是指AP通过轮询的方式收集STA的发送数据请求等其它方式。以AP获取STA的发送数据请求为AP接收到STA发送的RTS为例，AP基于接收到的所述STA发送的RTS信令，向ONU PON发送携带有数据包信息的通知信令，以供所述ONU PON基于该通知信令中携带的数据包信息向OLT申请相应带宽。其中，AP基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，可以是指AP接收到STA发送的RTS后，根据RTS按照设置的时间点向ONU PON发送携带有数据包信息的通知信令，或者是指AP以轮询等其它方式收集STA的发送数据请求后，根据收集到的发送数据请求按照设置的时间点向ONU PON发送携带有数据包信息的通知信令，其中，该设置的时间点可以是如下的任意一种：时间点1，AP在接收到RTS后的规定时间内、时间点2，AP在基于RTS返回CTS给STA的同时、时间点3，AP基于轮询的方式收集STA的发送数据请求等其它方式后，接收到的预期帧传输指令的同时。
如此，通过AP基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，ONU PON可以在接收到上行的业务数据之前，提前向OLT申请与所述数据包信息对应的相应带宽，因此，通过PON网络和WLAN网络的有效协调，有效降低上行传送时延。
步骤103，接收所述STA发送的业务数据并转发给所述ONU PON，所述业务数据用于根据所述相应带宽向所述OLT转发。
这里，OLT接收到ONU PON发送的带宽申请信令后，给所述ONU PON对应的AP分配相应带宽，当AP接收到STA发送的业务数据并转发ONU PON后，则对应的业务数据可以直接通过所分配的相应带宽向OLT转发，从而减小业务数据从STA到PON网络的OLT的上联接口的上行时延。
本申请上述实施例中，AP基于STA的发送数据请求直接向ONU PON发送携带有数据包信息的通知信令，以通过ONU PON在接收到数据包之前可以提前基于所述通知信令携带的数据包信息向OLT申请相应带宽，如此，ONU PON可以提前申请与待传输业务相应的带宽，对网络设备的兼容性好，从而能够在最大程度控制成本的前提下，有效地减小了业务数据从STA到PON网络的OLT的时延。
在一些实施例中，所述相应带宽是指固定带宽。在OLT接收到ONU PON的带宽申请信令后，给所述ONU PON对应的AP分配相应的固定带宽，可以进一步有效降低后续上行业务数据的时延，如此，当后续WLAN有持续上传的业务数据时，不需要每次都申请带宽，而可以通过所分配的固定带宽长期得到上行带宽。
在一些实施例中，所述基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，包括：
接收STA发送的RTS，确定所述RTS的接收方为AP时，根据所述RTS在规定时间内向ONU PON发送携带有数据包信息的通知信令。
这里，AP接收到STA发送的RTS后，对RTS的接收方是否为AP进行确认，当确认接收方是AP后，再执行给STA返回CTS信令、以及向ONU PON发送携带有数据包信息的通知信令的步骤。其中，所述规定时间通常为短帧间间隔时间(Short Interframe Space，SISF)的整数倍。其中，SIFS可以用于优先级高的场景，比如RTS和CTS之间，用以保证数据传输的原子性。为了能够尽量减小时延，AP在接收到STA发送的RTS并确定接收方为AP后，向ONU PON发出携带有数据包信息的通知信令的时间点应尽早，所述规定时间通常为一个SISF。
请参阅图5，AP根据所述RTS在规定时间内向ONU PON发送携带有数据包信息的通知信令的时间点可以是时间点1，也即，AP接收到STA发送的RTS并确定接收方为AP后，在间隔一个SISF后向ONU PON发出携带有数据包信息的通知信令。
在一些实施例中，所述基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，包括：
接收STA发送的RTS，确定所述RTS的接收方为AP时，根据所述RTS返回数据响应信令CTS并同时向ONU PON发送携带有数据包信息的通知信令。
这里，AP接收到STA发送的RTS后，对RTS的接收方是否为AP进行确认，当确认接收方是AP后，再执行给STA返回CTS信令、以及向ONU PON发送携带有数据包信息的通知信令的步骤。其中，根据所述RTS返回CTS并同时向ONU PON发送携带有数据包信息的通知信令，以供ONU PON在接收到数据包之前，可以基于该通知信令携带的数据包信息向OLT申请与所述数据包信息对应的相应带宽。为了能够尽量减小时延，AP在接收到STA发送的RTS并 确定接收方为AP后，向ONU PON发出携带有数据包信息的通知信令的时间点应尽早，AP在向STA返回CTS的同时立即给ONU PON发送一个通知信令，可以将AP向STA返回CTS以进一步接收STA发送的上行业务数据的时间，与ONU PON基于AP的通知信令向OLT申请相应带宽的时间并行，达到压缩上行数据传输时延的目的。
请再次参阅图5，AP根据所述RTS返回CTS并同时向ONU PON发送携带有数据包信息的通知信令的时间点可以是指时间点2，也即，AP接收到STA发送的RTS并确定接收方为AP后，同时向STA返回CTS以及向ONU PON发送携带有数据包信息的通知信令。
在一些实施例中，所述基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，包括：
基于轮询的方式收集到STA的发送数据请求后，基于预期帧传输指令向ONU PON发送携带有数据包信息的通知信令。
这里，AP还可以通过其它方式获取STA的发送数据请求，如AP以轮询的方式收集STA的发送数据请求，AP收集到STA的发送数据请求后，在AP开始对STA发送的上行业务数据进行接收之前，AP将响应STA发送的业务数据形成预期帧传输指令，也即，AP通知软件开始接收STA发送的业务数据的指令，AP基于所述预期帧传输指令向ONU PON发送携带有数据包信息的通知信令，以供ONU PON在接收到数据包之前，可以基于该通知信令携带的数据包信息向OLT申请与所述数据包信息对应的相应带宽。为了能够尽量减小时延，AP在收集到STA的发送数据请求后，向ONU PON发出携带有数据包信息的通知信令的时间点应越尽早越好，AP在实际接收到STA发送的上行业务数据之前，基于预期帧传输指令向ONU PON发送携带有数据包信息的通知信令，可以将AP接收STA发送的上行业务数据的时间与ONU PON基于AP的通知信令向OLT申请相应带宽的时间并行，同样可以达到压缩上行数据传输时延的目的。
再次参阅图5，AP基于轮询的方式收集到STA的发送数据请求后，基于预期帧传输指令向ONU PON发送携带有数据包信息的通知信令的时间点可以是指时间点3，也即，AP通过轮询或者其它方式收集到STA的发送数据请求后，当STA开始向AP传输上行业务数据时，AP将响应STA发送的业务数据形成预期帧传输指令以开始从STA接收上行业务数据时，AP基于预期帧传输指令向ONU PON发送携带有数据包信息的通知信令。
需要说明的是，为了能够尽量减小时延，AP在接收到STA的发送数据请求 后，向ONU PON发出携带有数据包信息的通知信令的时间点应越尽早越好，如图5所示，AP向ONU PON发出通知信令的时间点可以是在时间点1、时间2或时间点3，其中，时间点1和时间点2均是在STA向AP准备开始发送上行业务数据之前，压缩时延的效果相对更好；而对于STA与AP之间的RTS和CTS信令的交互均由硬件处理的场景下而言，也可以在STA开始向AP发送上行业务数据的同时，AP基于预期帧传输指令向ONU PON发送携带有数据包信息的通知信令，即在图示的时间点3发送。时间点3的获知无需对网络设备进行改进，从而兼容性更好。
在一些实施例中，在所述向ONU PON发送携带有数据包信息的通知信令之前，包括：
根据所述RTS中携带的网络分配矢量NAV信息确定数据包信息。
这里，数据包信息是指数据包长度信息。网络分配矢量(Network Allocation Vector，NAV)信息，是指发送数据需要占用无线媒介的时间。RTS信令携带NAV信息，如此，AP根据接收到RTS信令中的NAV信令，可以得到即将发送的数据包长度，从而能够形成携带数据包长度信息的通知指令向ONU PON发出，以使得ONU PON可以及时获知该通知指令并基于数据包长度信息向OLT申请相应带宽。
在一些实施例中，所述向ONU PON发送携带有数据包信息的通知信令之前，包括：
根据所述RTS以及设置的STA属性信息，确定所述STA是否为指定类型的时延敏感STA。
这里，WLAN和PON网络组网下，上行业务数据可以区分单业务和多业务两种模式进行展开，其中，单业务模式是指ONU上只有一种低时延的WLAN业务，或者可能还有其它的非WLAN业务，但是不同的业务被适配到PON网络的不同带宽单元(T-CONT)进行传送。多业务模式是指ONU上除了低时延的WLAN业务，还有其它时延不敏感的WLAN业务，不同的业务被适配到PON网络的不同T-CON进行传送。其中，不同的业务可以根据不同的STA属性，如STA地址进行区分，该设置的STA属性可以是指通过预先设置而获得的STA属性的信息。针对多业务模式，AP接收到所述RTS后，将确认接收端是否为AP，并判断STA是否为指定类型的时延敏感STA，也即判断RTS是否为时延敏感的STA发来的；若接收端为AP且是指定类型的时延敏感STA，则执行向ONU PON 发送携带有数据包信息的通知信令；若接收端不为AP，或者源头不为指定类型的时延敏感STA时，则不执行向ONU PON发送携带有数据包信息的通知信令，后续业务数据的传输可以采用如图1所示的数据传输方法进行转发。
请参阅图6，本申请实施例的另一方面，还提供一种数据传输方法，可应用于如图2或者图3所示的ONU PON，该方法包括如下步骤：
步骤201，接收无线接入点AP发送的携带有数据包信息的通知信令，根据所述通知信令向光线路终端OLT发送带宽申请信令，所述带宽申请信令用于所述OLT分配与所述数据包信息匹配的相应带宽。
其中，STA向AP发送上行业务数据前，会先发送RTS信令。AP可以基于接收到的所述STA发送的RTS信令或者基于轮询等其它方式收集STA的发送数据请求，基于STA的发送数据请求向ONU PON发送携带有数据包信息的通知信令。所述ONU PON接收AP发送的携带有数据包信息的通知信令，即可根据所述通知信令中携带的数据包信息向OLT发送带宽申请信令，以获得OLT基于所述带宽申请信令而分配的相应带宽。
本申请上述实施例中，ONU PON基于AP发送的携带有数据包信息的通知信令向OLT申请相应带宽，如此，ONU PON可以在接收到数据包之前提前基于所述通知信令携带的数据包信息向OLT申请相应带宽，如此，ONU PON向OLT申请与待传业务数据相应的带宽的时间、与待传业务数据从STA传送到ONU PON的时间实现了并行，达到了ONU PON可以提前申请与待传输业务相应的带宽以压缩时延的目的，其中通过AP和ONU PON之间的通知信令以及ONU和OLT之间带宽申请信令即可达到PON网络和WLAN网络间的有效协调，对网络设备的改动小，从而对网络设备的兼容性好，能够在最大程度控制成本的前提下，有效地减小业务数据从STA到PON网络的OLT的时延。
在一些实施例中，所述方法还包括：
接收所述AP转发的对应STA发送的业务数据，根据所述OLT分配的相应带宽转发所述业务数据。
ONU PON根据所述AP转发的STA发送的业务数据，根据所述OLT分配的相应带宽转发所述业务数据。
OLT接收到ONU PON发送的带宽申请信令后，给所述ONU PON对应的AP分配相应带宽，当AP接收到STA发送的业务数据后，将业务数据转发给ONU PON，ONU PON接收所述AP转发的STA发来的业务数据，则对应的业 务数据可以直接通过所分配的相应带宽向OLT转发，从而减小业务数据从STA到PON网络的OLT的上联接口的上行时延。
在一些实施例中，所述根据所述通知信令向OLT发送带宽申请信令，包括：
根据所述通知信令通过信令原有通道向OLT发送带宽申请信令，其中，所述带宽申请信令在所述信令原有通道内发送的优先级高于其它信令；或
根据所述通知信令通过指定专用通道向所述OLT发送带宽申请信令。
这里，信令原有通道是指ONU PON和OLT之间的已有的带宽申请信令的发送通道，如图1所示，已知的基于WLAN和PON网络组网的数据传输方法中ONU PON与OLT之间的report信令通道，以宽带无源光网络(Gigabit-Capable PON，GPON)/万兆吉比特无源光网络(XG-Passive Optical Network，XGPON)为例，信令原有通道的定义可以是宽带无源光综合接入标准(ITU-T G.984.3/G.987.3)所定义的上行动态带宽报告(Dynamic Bandwidth Report upstream，DBRu)信令通道。为了进一步确定带宽申请信令传输的及时性，对ONU PON和OLT之间的信令进行重新定义，将带宽申请信令定义为DATARequest信令，且DATARequest信令的优先级优先于其它的report信令发送，OLT在接收到该DATARequest信令后优先给该ONU PON的业务分配相应带宽，用于更高优先级地获取OLT分配的带宽。专用通道是指ONU PON和OLT之间专用于传输该带宽申请信令的发送通道，该专用通道通常是重新定义确定。
在一些实施例中，所述根据所述通知信令通过指定专用通道向OLT发送带宽申请信令包括：当PON网络为宽带无源光网络GPON时，所述指定专用通道为物理层操作管理和维护(Physical Layer Operations，Administration and Maintenance，PLOAM)通道。仍以GPON(Gigabit-Capable PON)/XGPON为例，专用通道的定义可以是宽带无源光综合接入标准(ITU-T G.984.3/G.987.3)所定义的PLOAM通道。OLT在接收到该DATARequest信令后，会通知DBA给该ONU PON的业务分配相应带宽，以用于更高优先级地获取OLT分配的带宽。
在一些实施例中，所述方法还包括：
确定在设置的时间门限值内未接收到所述通知信令时，向所述OLT发送带宽取消信令。
这里，OLT基于DATARequest信令向所述ONU PON申请分配的相应带宽为固定带宽，如此，可以有效降低STA后续上行业务数据的时延，如果后续 WLAN有持续上传的业务数据，不用每次都重新申请带宽，可长期得到上行带宽。为了确保后续WLAN上传业务数据后及时释放资源，对ONU PON和OLT之间的信令进行重新定义时，进一步增加带宽取消信令，定义为DATACancel信令。当STA后续有持续上传的业务数据时，AP将基于STA每次发送业务数据前的RTS信令向ONU PON发送通知信令，如此，ONU PON可以根据接收到的AP发送的通知信令来判断WLAN上传的业务数据的连续性。ONU PON确定在设置的时间门限值内未接收到所述通知信令时，向所述OLT发送DATACancel信令，以及时通知OLT停止该ONU PON相关业务的固定带宽分配，释放带宽资源。
在一些实施例中，所述确定在设置的时间门限值内未接收到所述通知信令时，向所述OLT发送带宽取消信令，包括：
根据所述通知信令向光线路终端OLT发送带宽申请信令后切换至工作状态；
在所述工作状态下开始计时，当在所述时间门限值内接收到通知信令，则计时清零并重新计时；
当在所述时间门限值内未接收到通知信令，向所述OLT发送带宽取消信令并由所述工作状态切换至空闲状态。
这里，针对DATARequest信令和DATACancel信令的发送需要，对所述ONU PON和OLT之间的信令进行重新定义时，进一步定义了时间td参数，通过所述td参数来记录ONU PON无数据申请的时间。ONU PON根据所述通知信令向光线路终端OLT发送带宽申请信令后切换至工作状态；在所述工作状态下开始计时，当在所述时间门限值内接收到通知信令，则计时清零并重新计时；当在所述时间门限值内未接收到通知信令，向所述OLT发送带宽取消信令并由所述工作状态切换至空闲状态，如此，ONU PON通过定义td参数对接收到AP发送的通知信令的连续性进行记录，确定在设置的时间门限值内未接收到所述通知信令时，也即所述td参数超过时间门限值时，向所述OLT发送DATACancel信令，以及时通知OLT停止该ONU PON相关业务的固定带宽分配，释放带宽资源。
请参阅图7，ONU PON包括工作状态(WORKING)和空闲状态(IDLE)两种状态。在IDLE状态，ONU PON收到WLAN数据申请(也即AP发送的inform信令)，则向OLT发送DATARequest，同时迁移到WORKING状态。在WORKING状态，td从0开始计时，如果ONU PON有持续接收到inform信令，则td清零；如果一段时间未收到inform信令，td持续增长，当td超过既定门限(比如1分 钟)，则ONU PON给OLT发送DATACancel信令，同时迁移到IDLE状态。
本申请上述实施例所提供的数据传输方法中，AP基于STA发送的RTS直接向ONU PON发送携带有数据包信息的通知信令，以通过ONU PON在接收到数据包之前可以提前基于所述通知信令携带的数据包信息向OLT申请相应带宽，如此，通过AP和ONU PON间的Inform信令及ONU PON和OLT间的DATARequest/DATACancel信令，达到PON网络和WLAN网络的有效协调。ONU PON可以提前申请与待传输业务相应的带宽，对网络设备的兼容性好，能够在最大程度控制成本的前提下，有效地减小业务数据从STA到PON网络的OLT的时延。
请参阅图8，为本申请一实施例所提供的基于WLAN和PON网络组网的数据传输方法的示意图，STA给AP发送上行业务数据前，先发送RTS信令给所述AP。RTS信令携带NAV(Network Allocation Vector)信息，即发送数据需要占用无线媒介的时间，由此可得到即将发送的数据包长度。如果AP接收到RTS后确定接收方为AP，在给STA返回CTS同时，给ONU PON发送一个Inform信令，并携带数据包长度信息。ONU PON在t1时刻接收到该Inform信令，同时知晓该数据包长度，把该数据包对应的DATARequest信令向OLT送出，此时，在数据包达到ONU PON前，ONU PON就已经向OLT申请相应带宽，从而达到压缩t1-t0时间的目的。
在OLT接收到ONU申请带宽的信令后，可以给ONU PON对应的AP业务分配固定带宽，以有效降低后续上行业务数据的时间。请参阅图9，后续WLAN有持续上传的数据报文(加粗线箭头表示WLAN持续上传的数据报文)时，不用每次都申请带宽，可长期得到上行带宽。为了确保带宽资源的及时释放，对ONU PON和OLT之间的信令进行重新定义时，进一步增加DATACancel信令，并通过定义td参数来记录ONU PON无数据申请的时间。当ONU PON确定在设置的时间门限值内未接收到所述Inform信令时，向所述OLT发送DATACancel信令，以及时通知OLT向ONU PON发送表征取消已分配的固定带宽的Grant(Deassign)信令，以停止该ONU PON的相关业务的固定带宽分配，释放带宽资源。
为了能够对本申请实施例所提供的数据传输方法的实现流程能够进一步了解，下面分别结合WLAN和PON网络组网的不同架构以及区分单业务和多业务两种模式的场景为例，对数据传输方法进行举例性说明。
场景一：以WLAN和PON网络组网包括AP和ONU PON，且所述AP和ONU PON共同形成ONU设备的组网且对应为单业务场景为例，其中AP内置 于ONU设备内，AP和ONU PON间的协同主要通过ONU内部的软件接口或硬件通道。单业务场景指ONU上只有一种低时延的WLAN业务，或可能还有其它的非WLAN业务，但是运营商会把不同的业务适配到PON层的不同的带宽单元(T-CONT)进行传送。请参阅图10，所述数据传输方法包括如下步骤：
步骤S11，STA向AP发送RTS信令。
步骤S12，AP接收到RTS信令后，确定接收端为AP，则通过ONU内部的软件或硬件通道给ONU PON发送Inform信令。
步骤S13，ONU PON在t1时刻接收到Inform信令后，向OLT发送DATARequest信令。
步骤S14，OLT基于DATARequest信令返回Grant(Assign)信令以分配相应带宽。
步骤S15，STA向AP发送业务报文，AP向ONU PON转发业务报文通过ONU PON向OLT的上联网络端口转发。
步骤S16，ONU PON在超过时间门限值内未接收到Inform信令时，向OLT发送DATACancel信令。
步骤S17，OLT响应DATACancel信令返回Grant(Deassign)信令以取消所分配的相应带宽。
场景二：以WLAN和PON网络组网包括AP和ONU PON，且所述AP和ONU PON共同形成ONU设备的组网且对应为多业务场景为例，其中AP内置于ONU设备内，AP和ONU PON间的协同主要通过ONU内部的软件接口或硬件通道。多业务场景则指ONU上除了低时延的WLAN业务，还有其他时延不敏感的WLAN业务，不同的业务可以根据不同的STA地址进行区分。运营商会把同一个ONU上的不同的业务适配到PON层的不同的带宽单元(T-CONT)进行传送。请参阅图11，所述数据传输方法包括如下步骤：
步骤S21，STA向AP发送RTS信令。
步骤S22，AP接收到RTS信令后，对接收端及RTS是否为时延敏感的STA发来的进行判断。
步骤S23，当确定接收端为AP，且判断源头为时延敏感STA时，则通过ONU内部的软件或硬件通道给ONU PON发送Inform信令，并执行步骤S25～S29。
步骤S24，当确定接收端为AP，且判断源头为非时延敏感STA时，则根据 已知的数据传输方法进行上行业务传输；其中，该已知的数据传输方法可以是如图1所示的基于WLAN和PON网络组网的数据传输方法。
步骤S25，ONU PON在t1时刻接收到Inform信令后，向OLT发送DATARequest信令。
步骤S26，OLT基于DATARequest信令返回Grant(Assign)信令以分配相应带宽。
步骤S27，STA向AP发送业务报文，AP向ONU PON转发业务报文通过ONU PON向OLT的上联网络端口转发。
步骤S28，ONU PON在超过时间门限值内未接收到Inform信令时，向OLT发送DATACancel信令。
步骤S29，OLT响应DATACancel信令返回Grant(Deassign)信令以取消所分配的相应带宽。
场景三：以WLAN和PON网络组网包括AP和ONU PON，且所述AP和ONU PON通过以太网接口连接、且对应为单业务场景为例，其中AP和ONUPON形成为分离的独立设备，AP和ONU PON的协同需要依靠在ONU和交换机或路由器之间定义协议接口，该协议接口满足快速收发的要求，传输上满足高优先级的要求，也即转发优先级高于非实时业务，或者使用专用的硬件通道传输。为了保障传输有效性，协议接口需要增加基于连接的交互机制以确定转发的优先级和保护机制。单业务场景指ONU上只有一种低时延的WLAN业务，或可能还有其它的非WLAN业务，但是运营商会把不同的业务适配到PON层的不同的带宽单元(T-CONT)进行传送。请参阅图12，所述数据传输方法包括如下步骤：
步骤S31，STA向AP发送RTS信令。
步骤S32，AP接收到RTS信令后，确定接收端为AP，则通过ONU和交换机或路由器间的协议接口给ONU PON发送Inform信令。
步骤S33，ONU PON在t1时刻接收到Inform信令后，向OLT发送DATARequest信令。
步骤S34，OLT基于DATARequest信令返回Grant(Assign)信令以分配相应带宽。
步骤S35，STA向AP发送业务报文，AP向ONU PON转发业务报文通过ONU PON向OLT的上联网络端口转发。
步骤S36，ONU PON在超过时间门限值内未接收到Inform信令时，向OLT发送DATACancel信令。
步骤S37，OLT响应DATACancel信令返回Grant(Deassign)信令以取消所分配的相应带宽。
场景四：以WLAN和PON网络组网包括AP和ONU PON，且所述AP和ONU PON通过以太网接口连接、且对应为多业务场景为例，其中AP和ONU PON形成为分离的独立设备，AP和ONU PON的协同需要依靠在ONU和交换机或路由器之间定义协议接口，该协议接口满足快速收发的要求，传输上满足高优先级的要求，也即转发优先级高于非实时业务，或者使用专用的硬件通道传输。为了保障传输有效性，协议接口需要增加基于连接的交互机制以确定转发的优先级和保护机制。多业务场景则指ONU上除了低时延的WLAN业务，还有其他时延不敏感的WLAN业务，不同的业务可以根据不同的STA地址进行区分。运营商会把同一个ONU上的不同的业务适配到PON层的不同的带宽单元(T-CONT)进行传送。请参阅图13，所述数据传输方法包括如下步骤：
步骤S41，STA向AP发送RTS信令。
步骤S42，AP接收到RTS信令后，对接收端及RTS是否为时延敏感的STA发来的进行判断。
步骤S43，当确定接收端为AP，且判断源头为时延敏感STA时，则通过ONU和交换机或路由器间的协议接口给ONU PON信令，并执行步骤S45～S49。
步骤S44，当确定接收端为AP，且判断源头为非时延敏感STA时，则根据已知的数据传输方法进行上行业务传输；其中，该已知的数据传输方法可以是如图1所示的基于WLAN和PON网络组网的数据传输方法。
步骤S45，ONU PON在t1时刻接收到Inform信令后，向OLT发送DATARequest信令。
步骤S46，OLT基于DATARequest信令返回Grant(Assign)信令以分配相应带宽。
步骤S47，STA向AP发送业务报文，AP向ONU PON转发业务报文通过ONU PON向OLT的上联网络端口转发。
步骤S48，ONU PON在超过时间门限值内未接收到Inform信令时，向OLT发送DATACancel信令。
步骤S49，OLT响应DATACancel信令返回Grant(Deassign)信令以取消 所分配的相应带宽。
但是需要说明的是，业务转发环节，需要保证协议数据和低时延的业务数据的转发优先级高于其它的时延不敏感业务。在ONU内部和在带AP的交换机或路由器内部都是如此。
请参阅图14，本申请实施例另一方面，提供一种数据传输装置，包括通知信令模块11和数据转发模块13，可以应用于如图2或图3所示的AP，所述通知信令模块11，用于基于站点STA的发送数据请求，向光网络单元的无源光网络模块ONU PON发送携带有数据包信息的通知信令，所述通知信令用于所述ONU PON基于所述数据包信息向光线路终端OLT申请相应带宽；所述数据转发模块13，用于接收所述STA发送的业务数据并转发给所述ONU PON，所述业务数据用于根据所述相应带宽向所述OLT转发。
在一些实施例中，所述通知信令模块11，具体用于接收STA发送的RTS，确定所述RTS的接收方为无线接入点AP时，根据所述RTS在规定时间内向ONU PON发送携带有数据包信息的通知信令。
在一些实施例中，所述规定时间为短帧间间隔时间SISF的整数倍。
在一些实施例中，所述通知信令模块11，具体用于接收站点STA发送的数据请求信令RTS，确定所述RTS的接收方为无线接入点AP时，根据所述RTS返回数据响应信令CTS并同时向无源光网络ONU PON发送携带有数据包信息的通知信令。
在一些实施例中，所述通知信令模块11，具体用于基于轮询的方式收集到STA的发送数据请求后，基于预期帧传输指令向ONU PON发送携带有数据包信息的通知信令。
在一些实施例中，所述通知信令模块11，还用于根据所述RTS中携带的网络分配矢量NAV信息确定数据包信息。
在一些实施例中，所述通知信令模块11，还用于根据所述RTS以及设置的STA属性信息，确定所述STA是否为指定类型的时延敏感STA。
上述实施例提供的数据传输装置在实现数据传输方法时，仅以上述各程序模块的划分进行举例说明，在实际应用中，可以根据需要而将上述步骤分配由不同的程序模块完成，即可以将数据传输装置实现数据传输方法的程序的内部结构划分成不同的程序模块，以完成以上描述的全部或者部分处理。该数据传输装置可以是实现所述应用于所述AP的数据传输方法的AP，其具体实现过程详见方法实施例，这里不再赘述。
本发明实施例另一方面，请再次参阅图14，还提供一种AP，该AP包括处理器14以及用于存储能够在处理器14上运行的计算机程序的存储介质15，其中，所述处理器14用于运行所述计算机程序时，执行本申请任一实施例所提供的应用于所述AP的数据传输方法的步骤。这里，处理器14和存储介质15并非指代对应的数量为一个，而是可以为一个或者多个。存储介质15中可以存储用于实现本发明实施例所提供的应用于所述AP的基于WLAN和PON网络组网的数据传输装置，该处理器14用于提高计算和控制能力，支撑整个AP的运行。
请参阅图15，本申请实施例另一方面，提供一种数据传输装置，可以应用于如图2或图3所示的ONU PON，所述装置包括带宽申请模块21，用于接收无线接入点AP发送的携带有数据包信息的通知信令，根据所述通知信令向光线路终端OLT发送带宽申请信令，所述带宽申请信令用于所述OLT分配与所述数据包信息匹配的相应带宽。
在一些实施例中，所述装置还包括业务数据模块23，用于接收所述AP转发的对应站点STA发送的业务数据，根据所述OLT分配的相应带宽转发所述业务数据。
在一些实施例中，所述带宽申请模块21，具体用于根据所述通知信令通过信令原有通道向OLT发送带宽申请信令，其中，所述带宽申请信令在所述信令原有通道内发送的优先级高于其它信令；或，根据所述通知信令通过指定专用通道向所述OLT发送带宽申请信令。
在一些实施例中，当PON网络为宽带无源光网络GPON时，所述指定专用通道为物理层操作管理和维护PLOAM通道。
在一些实施例中，所述装置还包括带宽取消模块26，用于确定在设置的时间门限值内未接收到所述通知信令时，向所述OLT发送带宽取消信令。
在一些实施例中，所述带宽取消模块26，包括状态切换单元261和计时单元262，所述状态切换单元261，用于根据所述通知信令向OLT发送带宽申请信令后切换至工作状态；所述计时单元262，用于在所述工作状态下开始计时，当在所述时间门限值内接收到通知信令，则计时清零并重新计时；所述状态切换单元，还用于当在所述时间门限值内未接收到通知信令，向所述OLT发送带宽取消信令并由所述工作状态切换至空闲状态。
上述实施例提供的数据传输装置在实现数据传输方法时，仅以上述各程序模块的划分进行举例说明，在实际应用中，可以根据需要而将上述步骤分配由不同的程序模块完成，即可以将数据传输装置实现数据传输方法的程序的内部 结构划分成不同的程序模块，以完成以上描述的全部或者部分处理。该数据传输装置可以是实现所述应用于所述ONU PON的数据传输方法的ONU PON，其具体实现过程详见方法实施例，这里不再赘述。
本发明实施例另一方面，请再次参阅图15，还提供一种ONU PON，所述ONU PON包括处理器24以及用于存储能够在处理器24上运行的计算机程序的存储介质25，其中，所述处理器24用于运行所述计算机程序时，执行本申请任一实施例所提供的所述数据传输方法的步骤。这里，处理器24和存储介质25并非指代对应的数量为一个，而是可以为一个或者多个。存储介质25中可以存储用于实现本发明实施例所提供的应用于所述ONU PON的数据传输装置，该处理器24用于提高计算和控制能力，支撑整个ONU PON的运行。
本发明实施例另一方面，还提供了一种存储介质，例如包括存储有计算机程序的存储器，该计算机程序可以由处理器执行，以完成本发明任一实施例所提供的数据传输方法的步骤。该存储介质可以是铁电随机存储器(Ferroelectric Random Access Memory，FRAM)、只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable Read-Only Memory，PROM)、可擦式可编程只读存储器(Erasable Programmable Read-Only Memory，EPROM)、电可擦编程只读存储器(Electrically Erasable Programmable Read Only Memory，EEPROM)、闪存(Flash Memory)、磁表面存储器、光盘、或便携式紧凑磁盘只读存储器(Compact Disc Read Only Memory，CD-ROM)等存储器；也可以是包括上述存储器之一或任意组合的各种设备。

Claims (19)

  1. 一种数据传输方法，包括：
    基于站点STA的发送数据请求，向光网络单元的无源光网络模块ONU PON发送携带有数据包信息的通知信令，所述通知信令用于所述ONU PON基于所述数据包信息向光线路终端OLT申请相应带宽；
    接收所述STA发送的业务数据并将所述业务数据转发给所述ONU PON，所述业务数据用于根据所述相应带宽向所述OLT转发。
  2. 如权利要求1所述的方法，其中，所述基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，包括：
    接收所述STA发送的数据请求信令RTS，在确定所述RTS的接收方为无线接入点AP的情况下，根据所述RTS在规定时间内向所述ONU PON发送携带有所述数据包信息的通知信令。
  3. 如权利要求2所述的方法，其中，所述规定时间为短帧间间隔时间SISF的整数倍。
  4. 如权利要求1所述的方法，其中，所述基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，包括：
    接收所述STA发送的RTS，在确定所述RTS的接收方为AP的情况下，根据所述RTS返回数据响应信令CTS并同时向所述ONU PON发送携带有所述数据包信息的通知信令。
  5. 如权利要求1所述的方法，其中，所述基于STA的发送数据请求，向ONU PON发送携带有数据包信息的通知信令，包括：
    基于轮询的方式收集到所述STA的发送数据请求后，基于预期帧传输指令向所述ONU PON发送携带有所述数据包信息的通知信令。
  6. 如权利要求1至5中任一项所述的方法，其中，在所述向ONU PON发送携带有数据包信息的通知信令之前，还包括：
    根据RTS中携带的网络分配矢量NAV信息确定所述数据包信息。
  7. 如权利要求1至5中任一项所述的方法，其中，在所述向ONU PON发送携带有数据包信息的通知信令之前，还包括：
    根据RTS以及设置的STA属性信息，确定所述STA是否为指定类型的时延敏感STA。
  8. 一种数据传输方法，包括：
    接收无线接入点AP发送的携带有数据包信息的通知信令，根据所述通知信 令向光线路终端OLT发送带宽申请信令，所述带宽申请信令用于所述OLT分配与所述数据包信息匹配的相应带宽。
  9. 如权利要求8所述的方法，还包括：
    接收所述AP转发的站点STA发送的业务数据，根据所述OLT分配的相应带宽转发所述业务数据。
  10. 如权利要求8所述的方法，其中，所述根据所述通知信令向OLT发送带宽申请信令，包括：
    根据所述通知信令通过信令原有通道向所述OLT发送所述带宽申请信令，其中，所述带宽申请信令在所述信令原有通道内发送的优先级高于其它信令；或者，
    根据所述通知信令通过指定专用通道向所述OLT发送带宽申请信令。
  11. 如权利要求10所述的方法，其中，所述根据所述通知信令通过指定专用通道向所述OLT发送带宽申请信令，包括：
    在无源光网络PON为宽带无源光网络GPON的情况下，所述指定专用通道为物理层操作管理和维护PLOAM通道。
  12. 如权利要求8至11中任一项所述的方法，还包括：
    在确定在设置的时间门限值内未接收到所述通知信令的情况下，向所述OLT发送带宽取消信令。
  13. 如权利要求12所述的方法，其中，所述在确定在设置的时间门限值内未接收到所述通知信令的情况下，向所述OLT发送带宽取消信令，包括：
    根据所述通知信令向所述OLT发送带宽申请信令后切换至工作状态；
    在所述工作状态下开始计时，在在所述时间门限值内接收到通知信令的情况下，计时清零并重新计时；
    在在所述时间门限值内未接收到所述通知信令的情况下，向所述OLT发送所述带宽取消信令并由所述工作状态切换至空闲状态。
  14. 一种数据传输装置，包括：
    通知信令模块，设置为基于站点STA的发送数据请求，向光网络单元的无源光网络模块ONU PON发送携带有数据包信息的通知信令，所述通知信令用于所述ONU PON基于所述数据包信息向光线路终端OLT申请相应带宽；
    数据转发模块，设置为接收所述STA发送的业务数据并将所述业务数据转发给所述ONU PON，所述业务数据用于根据所述相应带宽向所述OLT转发。
  15. 一种无线接入点AP，包括处理器和设置为存储能够在处理器上运行的计算机程序的存储器；其中，
    所述处理器设置为运行所述计算机程序时，执行权利要求1至7中任一项所述的数据传输方法。
  16. 一种数据传输装置，包括：
    带宽申请模块，设置为接收无线接入点AP发送的携带有数据包信息的通知信令，根据所述通知信令向光线路终端OLT发送带宽申请信令，所述带宽申请信令用于所述OLT分配与所述数据包信息匹配的相应带宽。
  17. 一种光网络单元的无源光网络模块ONU PON，包括处理器和设置为存储能够在处理器上运行的计算机程序的存储器；其中，
    所述处理器设置为运行所述计算机程序时，执行权利要求8至13中任一项所述的数据传输方法。
  18. 一种无线局域网WLAN和无源光网络PON网络组网，包括如权利要求14所述的数据传输装置以及如权利要求16所述的数据传输装置，所述数据传输装置共同形成光网络单元ONU设备；或者
    包括如权利要求15所述的无线接入点AP以及如权利要求17所述的光网络单元的无源光网络模块ONU PON，所述AP和所述ONU PON通过以太网接口连接。
  19. 一种存储介质，所述存储介质中存储有可执行指令，所述可执行指令被处理器执行时实现权利要求1至13中任一项所述的数据传输方法。
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