CN113285984A - P2P redirection mechanism based on cloud edge combination technology - Google Patents
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Abstract
The invention relates to a P2P redirection mechanism based on a cloud edge combination technology, which comprises the following steps: the method comprises the steps that a P2P service request message is sent by a user and is transmitted to an ONU (optical network unit), after the ONU receives a P2P service request sent by the user, the P2P service request is identified through service and data packet information of the request is extracted, wherein the data packet information comprises a file name, the ONU compares the file name with a file information table (namely an ONU table) maintained by the ONU, detects whether the file name exists in the ONU table and carries out corresponding processing, and if the file name does not exist in the ONU table, further judges whether the file name exists in an OLT table. The P2P redirection mechanism can process a plurality of requests as internal flow, solves the problem of overweight calculation load of a central OLT of cloud calculation, effectively reduces the P2P flow in a core network to improve the carrying capacity of a PON to local P2P service, and accordingly improves the overall QoS and bandwidth utilization rate.
Description
Technical Field
The invention belongs to the technical field of P2P service transmission, and particularly relates to a P2P redirection mechanism based on a cloud edge combination technology.
Background
At present, the P2P technology is widely applied to the fields of file sharing, network video, network telephony and the like, and provides more resources, higher available bandwidth and better service quality for users by using the characteristics of distributed resource sharing, parallel transmission and the like, the P2P application has become one of the main applications of the internet, the P2P mode also becomes the preferred mode of many novel services, and new services are emerging continuously, especially some immature services, so that the infrastructure of both an access network and a core network bears huge pressure, a centralized cloud cannot meet the cloud resource requirements of large connection, low delay and large bandwidth on a terminal side, and how to effectively bear the P2P service becomes an important research direction.
Currently, there are some researches on optimization of P2P service transmission capability, such as a solution proposed by beijing post and telecommunications university, which mainly aims at topology mismatch between PON in master-slave structure and P2P network, and is used for handling redirection mechanism of P2P layer protocol. However, the currently proposed scheme generally does not take the problems of heavy burden and high time delay caused by the increase of the number of access networks into consideration, so the invention provides a P2P redirection mechanism based on the cloud edge bonding technology, which can solve the problem of heavy calculation load of a central OLT of cloud calculation, and effectively reduce P2P traffic in a core network to improve the carrying capacity of a PON for local P2P services.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a P2P redirection mechanism based on a cloud edge bonding technology, which can solve the problem of heavy computing load of a central OLT of cloud computing and effectively reduce P2P traffic in a core network so as to improve the carrying capacity of an EPON for local P2P services.
The technical scheme adopted by the invention is as follows: a P2P redirection mechanism based on cloud edge binding technology comprises the following steps:
the method comprises the following steps: the method comprises the steps that a user sends a P2P service request message and transmits the message to an ONU (optical network unit), and after the ONU receives a P2P service request sent by the user, the P2P service request is identified through service and data packet information of the request is extracted, wherein the data packet information comprises a file name;
step two: the ONU compares the file name with an ONU table which is a file information table maintained by the ONU, and detects whether the file name exists in the ONU table;
step three: when the file name is in the ONU table, the ONU treats the P2P service request as internal flow, the ONU replies the request to the user according to the maintained ONU table and adds user _ MAC to the ONU table,
when the file name is not in the ONU table but exists in the OLT table, the ONU transmits the P2P service request as internal traffic to the OLT, and the OLT responds to the request,
and when the file name is not in the ONU table or the OLT table, the OLT sends a request to the FSO, the FSO transmits the data information of the request file to the OLT, the OLT sends the data of the request file to the ONU, and the ONU transmits the data of the request file to a user.
Preferably, in step three, the URL includes the file name of the P2P service request and the data type of the service request file.
Preferably, in step three, the replying, by the ONU, the request to the user according to the maintained ONU table specifically includes: the method comprises the steps that an ONU intercepts a P2P service request message downloaded by a user, carries out deep detection and records each peer downloading condition information table in real time, if a unique LLID exists in an ONU table maintained by the ONU, the ONU treats the service request as local flow, if the unique LLID does not exist in the ONU table maintained by the ONU, the ONU sends the service request to an OLT, and the OLT adds the corresponding LLID into the ONU table.
Preferably, in step three, the responding, by the OLT, to the request specifically includes: the OLT checks the unique LLID to determine whether the requested file already exists, if so, the OLT directly replies to the request of the ONU, adds the request file to the ONU table and updates the record, and the OLT starts a file transmission stream by putting the unique LLID into a frame, if not, the OLT allocates a unique LLID for the requested file and adds the LLID to the OLT table.
Preferably, the ONU includes an ONU traffic classifier and a P2P controller, wherein the ONU traffic classifier is configured to classify user traffic according to different parameters, and the P2P controller is configured to process the request into local traffic and transmit the local traffic to the user.
Preferably, the OLT includes an OLT traffic classifier and a P2P engine, the OLT traffic classifier is configured to classify P2P traffic in downstream and upstream directions, the P2P engine includes firmware, a packet processing engine, a microprocessor unit, a buffer, and a memory, the firmware includes an algorithm for processing the request, and updating functions of the ONU and OLT tables, and the packet processing engine is configured to process the packet to an application layer in the OSI model.
Preferably, in step three, the OLT sends the data of the request file to the ONU, and the specific process of the ONU transmitting the data of the request file to the user is as follows: and the P2P engine in the OLT performs message transmission with the ONU, the OLT allocates a unique LLID for the file requested by the P2P service and adds the LLID into an OLT table, and the OLT transmits the data of the requested file to a user after processing.
Preferably, the specific process of the P2P engine and the ONU in the OLT executing message transmission is as follows: the OLT traffic classifier in the OLT transmits the request file data to the P2P engine by the P2P controller in the ONU.
The invention has the beneficial effects that: the edge node ONU of the invention replaces the central OLT of cloud computing to bear part of workload, can process a plurality of P2P requests as the internal flow of the ONU, and does not directly send the requests to the OLT, thereby redirecting the flow to the access network and reducing delay, solving the problem of overweight computing load of the central OLT of the cloud computing, simultaneously saving the bandwidth of a feeder fiber, reducing the data flow load on a core network to improve the bearing capacity of the EPON to the local P2P service, and further improving the whole QoS and the bandwidth utilization rate.
Drawings
FIG. 1 is a flow chart of the present invention;
fig. 2 is a system architecture diagram of an ONU according to the present invention;
FIG. 3 is a block diagram of an OLT according to the present invention;
FIG. 4 is a diagram of a network architecture for cloud edge bonding techniques according to the present invention;
fig. 5 is a schematic diagram illustrating an interaction between an ONU and a user according to the present invention;
FIG. 6 is a schematic diagram of the interaction between the OLT and the user according to the present invention;
fig. 7 is a schematic diagram of interaction between an OLT and a user through FSO according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a P2P redirection mechanism based on cloud edge binding technology includes the following steps:
the method comprises the following steps: the method comprises the steps that a user sends a P2P service request message and transmits the message to an ONU (optical network unit), and after the ONU receives a P2P service request sent by the user, the P2P service request is identified through service and data packet information of the request is extracted, wherein the data packet information comprises a file name;
step two: the ONU compares the file name with an ONU table which is a file information table maintained by the ONU, and detects whether the file name exists in the ONU table;
step three: when the file name is in the ONU table, the ONU treats the P2P service request as an internal traffic, and the ONU replies a request to the user according to the maintained ONU table and adds a user _ MAC to the ONU table, which specifically comprises the following steps: the ONU intercepts a P2P service request message downloaded by a user, carries out deep detection and records each peer downloading condition information table in real time, if the ONU table maintained by the ONU has a unique LLID, the ONU processes the service request as local traffic, and if there is no unique LLID in the ONU table maintained by the ONU, the ONU sends the service request to the OLT, the OLT adds the corresponding LLID to the ONU table, the ONU intercepts the query receipt message of the P2P service, and a local file information table sent to the ONU by the OLT is maintained in real time, the file which the local peer wants to download is compared with the local file information table, if the peer can download the file from the home network, a query receipt message is constructed by using the local peer information and is sent to the peer in the home network, so that the file can be only transmitted in the home network, and the aim of redirection is fulfilled.
When the file name is not in the ONU table but exists in the OLT table, the ONU sends the P2P service request as an internal traffic to the OLT, and the OLT responds to the request, which specifically includes: the OLT checks the unique LLID to determine whether the requested file already exists, if so, the OLT directly replies to the request of the ONU, adds the request file to the ONU table and updates the record, and the OLT starts a file transmission stream by putting the unique LLID into a frame, if not, the OLT allocates a unique LLID for the requested file and adds the LLID to the OLT table.
The ONU comprises an ONU traffic classifier and a P2P controller, the ONU architecture is shown in fig. 2, the ONU traffic classifier comprises four modules including a CoS classifier, a routing table, packet forwarding and ingress rules, which enable the ONU to classify user traffic based on different parameters, the P2P controller is used to process requests into local traffic and deliver it to the user, the internal traffic is traffic between the ONU and the OLT and traffic between the ONU and the user without sending information to the OLT through the feeder fiber, the P2P controller consists of a packet analyzer and various functions, which process requests to the application layer in the OSI model, if the OLT has multicast the requested channel and there is a unique LLID in the ONU table, the ONU processes the request as local traffic, if the OLT has not broadcast the requested channel, or there is no unique LLID in the ONU table, the request will be sent to the OLT, which adds the required LLID to the ONU table, the main function of the P2P controller is to handle the partial P2P request as local traffic, and in addition, the P2P controller works in conjunction with the P2P engine of the OLT in order to manage multicast operations and ONU tables.
The OLT includes an OLT traffic classifier for classifying P2P traffic in downstream and upstream directions and a P2P engine, the P2P engine includes firmware including an algorithm for processing the above requests and updating functions of the ONU and OLT tables, a packet processing engine for processing the packet to an application layer in the OSI model, a microprocessor unit, a buffer and a memory, the OLT runs a Request _ LLID function to check a unique LLID to determine whether a requested channel is already present when the ONU forwards the Request, if not, the OLT runs an Add _ ONU function to Add a record to the ONU table and update its information, after updating the ONU and OLT tables, the OLT starts a channel flow by putting the LLID in a frame, the OLT table controls starting and stopping data channel multicast, when there is no user Request for the channel in the ONU table, the ONU requests the OLT to Delete the ONU _ LLID from the OLT table through a Delete function in the P2P engine, and if there is no ONU _ LLID in the channel record, the OLT stops multicasting data by running a Stop function.
When the file name is not in the ONU table or the OLT table, the OLT sends a request to an FSO (session initiation protocol), the FSO transmits the data information of the request file to the OLT, the OLT sends the data of the request file to the ONU, and the ONU transmits the data of the request file to a user, wherein the specific process comprises the following steps: the P2P engine in the OLT performs message transmission with the ONU, namely, the OLT traffic classifier in the OLT transmits the request file data to the P2P engine by the P2P controller in the ONU, the OLT allocates a unique LLID for the file requested by the P2P service and adds the LLID into an OLT table, and the OLT transmits the data of the requested file to the user through processing.
The invention introduces a P2P redirection mechanism based on cloud edge combination technology, namely a cloud computing center OLT is combined with an edge node ONU, the network architecture of the cloud edge combination technology is shown in figure 4, the OLT comprises an edge controller, a device controller and an API resource server, the edge controller and the device controller are all interconnected with the API resource server, the OLT plays the role of the cloud computing center in traffic identification, service control, QoS guarantee, P2P redirection and other services, except providing a service convergence function, the OLT also is a centralized network management platform, the ONU is a group of edge nodes with certain computing capability in edge computing and can serve as assistants for completing computing tasks, each edge node comprises an edge computing center, the edge computing center is interconnected with a service bus, device management and metadata management, an event bus is respectively interconnected with the edge computing center and a device management module, the metadata management and the edge processing module are interconnected, the data storage module is arranged for both equipment management and the metadata management, in a P2P redirection service, a cloud computing service provider sinks and deploys a centralized processing task of a cloud computing center OLT to edge computing, when a user side sends a request, an edge computing node ONU firstly processes, when more complex content is met, the ONU transmits uplink to the cloud computing center OLT for centralized processing, the edge computing can improve the customer response speed, enhance the user experience and save the bandwidth, and therefore centralized cloud computing drainage is achieved.
The redirection mechanism selects the OLT as the center of the cloud computing, the functions of the OLT are distributed to a plurality of ONUs at the edge of a core network for realization, each ONU is responsible for maintaining the information of the peer in the peripheral edge network, if the ONU can not meet the peer request of a user, the peer information in other networks is obtained from the central OLT of the cloud computing, and returns to the user, the ONU acquires and analyzes the interactive information between the peers in the P2P protocol, then extracting the information of the files which are downloaded in the access network connected with the ONU from the file information, when finding that other users in the access network need to download the same files, the P2P protocol message is modified, so that the query result is returned by only one hop of the query message of the P2P end system operated by the user, the query failure rate and the query distance are obviously optimized, and in addition, the query message can be preferentially established and downloaded with a local peer, and the mismatch problem can be solved from the two aspects of the query distance and the file transmission.
The MPCP protocol defines a control mechanism between the OLT and the ONUs to coordinate the efficient transmission and reception of data, the operating functions of MPCP are as shown in the table below,
with reference to table 1, the specific process of the redirection mechanism of the present invention is as follows:
if the requested P2P service file is in the ONU table, the ONU directly replies an MPCP _ DESCRIBE request to the user, adds user _ MAC to the ONU table, and continues to run the channel registration operations of SETUP and PLAY by emulating the MPCP protocol, as shown in fig. 5, in which case the request will be processed as internal traffic; if the requested P2P file is not in the ONU table, but is in the OLT table, the ONU will continue to run channel registration for SETUP and PLAY by emulating the MPCP protocol by sending an MPCP _ DESCRIBE request to the OLT and adding the request to the ONU table, which will reply to the ONU directly with the request and add the ONU _ LLID to the OLT table, in which case the P2P traffic will be handled as internal traffic, as shown in FIG. 6; if the requested P2P file is not in the ONU or in the OLT table, the OLT assigns a unique LLID to the requested channel and adds ONU _ LLID to the OLT table, the OLT starts setting MPCP using FSO, and after FSO depends on MPCP _ PLAY, the channel stream data is transmitted to the OLT through TCP, so that the P2P engine of the OLT performs MPCP message transmission with the ONU, and the ONU transmits the channel stream data to the user after replying the MPCP _ PLAY request to the user, as shown in fig. 7.
The P2P redirection mechanism can process a plurality of requests as internal flow, solve the problem of heavy load of a central OLT of cloud computing, save the bandwidth of a feeder optical fiber, effectively reduce the P2P flow in a core network to improve the bearing capacity of the EPON to the local P2P service, and further improve the overall QoS and bandwidth utilization rate.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. A P2P redirection mechanism based on cloud edge binding technology is characterized by comprising the following steps:
the method comprises the following steps: the method comprises the steps that a user sends a P2P service request message and transmits the message to an ONU (optical network unit), and after the ONU receives a P2P service request sent by the user, the P2P service request is identified through service and data packet information of the request is extracted, wherein the data packet information comprises a file name;
step two: the ONU compares the file name with an ONU table which is a file information table maintained by the ONU, and detects whether the file name exists in the ONU table;
step three: when the file name is in the ONU table, the ONU treats the P2P service request as internal flow, the ONU replies the request to the user according to the maintained ONU table and adds user _ MAC to the ONU table,
when the file name is not in the ONU table but exists in the OLT table, the ONU transmits the P2P service request as internal traffic to the OLT, and the OLT responds to the request,
and when the file name is not in the ONU table or the OLT table, the OLT sends a request to the FSO, the FSO transmits the data information of the request file to the OLT, the OLT sends the data of the request file to the ONU, and the ONU transmits the data of the request file to a user.
2. The P2P redirection mechanism according to claim 1, wherein in step three, the ONU replies a request to the user according to the maintained ONU table specifically including: the method comprises the steps that an ONU intercepts a P2P service request message downloaded by a user, carries out deep detection and records each peer downloading condition information table in real time, if a unique LLID exists in an ONU table maintained by the ONU, the ONU treats the service request as local flow, if the unique LLID does not exist in the ONU table maintained by the ONU, the ONU sends the service request to an OLT, and the OLT adds the corresponding LLID into the ONU table.
3. The P2P redirection mechanism according to claim 1, wherein in step three, the OLT responding to the request specifically comprises: the OLT checks the unique LLID to determine whether the requested file already exists, if so, the OLT directly replies to the request of the ONU, adds the request file to the ONU table and updates the record, and the OLT starts a file transmission stream by putting the unique LLID into a frame, if not, the OLT allocates a unique LLID for the requested file and adds the LLID to the OLT table.
4. The cloud edge binding technology-based P2P redirection mechanism according to claim 1, wherein: the ONU comprises an ONU flow classifier and a P2P controller, wherein the ONU flow classifier is used for classifying user flow through different parameters, and the P2P controller is used for processing the request into local flow and transmitting the local flow to the user.
5. The P2P redirection mechanism based on cloud edge binding technology according to claim 4, wherein: the OLT comprises an OLT traffic classifier and a P2P engine, the OLT traffic classifier is used for classifying P2P traffic in the downstream and upstream directions, the P2P engine comprises firmware, a packet processing engine, a microprocessor unit, a buffer and a memory, the firmware comprises an algorithm for processing the request and updating the functions of the ONU and the OLT table, and the packet processing engine is used for processing the packet to an application layer in an OSI model.
6. The P2P redirection mechanism based on cloud edge binding technology as claimed in claim 5, wherein in step three, the OLT sends the data of the request file to the ONU, and the specific process of the ONU delivering the data of the request file to the user is: and the P2P engine in the OLT performs message transmission with the ONU, the OLT allocates a unique LLID for the file requested by the P2P service and adds the LLID into an OLT table, and the OLT transmits the data of the requested file to a user after processing.
7. The P2P redirection mechanism according to claim 6, wherein the P2P engine in the OLT and the ONUs perform message passing through specifically as follows: the OLT traffic classifier in the OLT transmits the request file data to the P2P engine by the P2P controller in the ONU.
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