CN105357088A - Cloud-framework efficient system network transmission method under interactive media service environment - Google Patents

Abstract

The invention discloses a high-efficiency system network transmission method under the interactive media service environment of the cloud architecture, including: (1) the user set-top box sends a data packet containing authentication and registration information to the data layer of the gateway device, and the data layer receives the received The data packet is classified and addressed, and then the data layer extracts the information in the data packet and sends it to the control layer of the gateway device. The control layer performs signaling interaction, authentication and registration interaction with the server according to the received information; (2) the user The set-top box sends service request information to the data layer, and the control layer of the gateway device allocates the corresponding downlink channel according to the received service request information from the data layer and notifies the data layer. The assigned downlink channel sends service data to the user's set-top box. The invention optimizes and dispatches integrated network resources, improves the efficiency of data transmission, and provides a data channel with QoS guarantee for service data.

Description

Efficient system network transmission method in the interactive media service environment of cloud architecture

technical field

The invention relates to an efficient system network transmission method under the interactive media service environment of cloud architecture.

Background technique

With the advent of the era of cloud computing, in the process of the media industry moving toward mass content, personalized experience, high-definition interaction, and terminal diversification, profound changes have taken place in the three major elements of media communication—content, network, and terminal. The change. The content is richer, covering audio, video, graphics, text, etc.; the network is more diverse, covering various transmission methods such as radio and television, telecommunications, and the Internet; the terminal is more ubiquitous, penetrating into TVs, mobile phones, personal computers, and tablets. and other terminals. How to make full use of the technological revolution brought about by cloud computing, continuously reduce the construction and management costs of media networks, continuously improve user experience, and ultimately improve investment returns is a new issue facing our current media industry.

Cloud computing is more and more widely used in the field of radio and television media services, but the simultaneous construction of "cloud, pipe, and terminal". Currently, radio and television network companies have devoted a lot of energy to "cloud" and "terminal", ignoring the "cloud" and "terminal" to a certain extent. In view of the importance of "management", this paper discusses the application of efficient collaborative transmission in radio and television video cloud services, hoping to integrate multiple transmission methods. Useful discussion on channel construction.

At present, cable TV network companies around the world rely on years of rich experience accumulated in the fields of interactive TV, live channels, broadband access, IDC data centers, etc., to build industry-specific features, while reflecting the characteristics of media services, advanced compatibility, high efficiency, safety, and controllability. "Media Cloud". Specifically, "media cloud" includes two levels of "media cloud" platform and "media cloud" service.

The media cloud platform is based on a high-standard, schedulable, and scalable cloud computing center, which has the characteristics of openness, compatibility, and security. The evolution direction of the "cloud-pipe-device" collaborative development operation model has basically taken shape, but the problem of high-speed transmission pipelines has become increasingly prominent, and it is urgent to solve the problem of efficient transmission of large-grained and high-bandwidth video services. In order to better solve this problem, it is necessary to comprehensively Utilize the mixed networking advantages of two-way IP (Internet Protocol) channel and HFC (Hybrid Fiber-Coaxial) channel, use the characteristics of "single-point reception, full network coverage" of the broadcast network, supplemented by the personalized feature of two-way interaction of IP channel, to realize integrated media Efficient systematic delivery of service content.

Contents of the invention

The purpose of the present invention is to provide an efficient system network transmission method under the interactive media service environment of cloud architecture.

In order to achieve the above object, the technical solution adopted by the present invention is: the efficient system network transmission method under the interactive media service environment of the cloud architecture of the present invention comprises the following steps:

(1) The user set-top box sends a data packet containing authentication and registration information to the data layer of the gateway device. The data layer of the gateway device classifies and translates the address of the received data packet, and then the data layer extracts the information in the data packet and sends it to The control layer of the gateway device, the control layer performs signaling interaction, authentication and registration interaction with the server according to the received information;

(2) The user set-top box sends service request information to the data layer of the gateway device, and the control layer of the gateway device allocates the corresponding downlink channel according to the received service request information from the data layer and notifies the data layer, and the data layer processes the service data After classification and address translation, the service data is sent to the user's set-top box according to the allocated downlink channel.

Further, the data layer of the present invention includes a channel data adapter, a classifier module, a NAT module, and a data receiving and sending module, and the control layer includes a signaling interaction module, an AAA client and an SM/PS client; in the In step (1), the user set-top box sends data packets containing authentication and registration information to the channel data adapter, the classifier module classifies the data packets received by the channel data adapter, and the NAT module classifies the data packets received by the channel data adapter Carry out address translation; The data receiving and sending module extracts the information in the packet received by the channel data adapter and through classification and address translation and sends it to the signaling interaction module, AAA client and SM/PS client, signaling The interaction module performs signaling interaction with the server according to the received information, and the AAA client and the SM/PS client respectively perform authentication and registration interactions with the server according to the received information.

Further, the data receiving and sending module of the present invention also includes a timeout timer, and the control layer also includes a channel management module and a channel controller;

Said step (2) includes:

Step 1): The user set-top box sends a data packet containing service request information to the channel data adapter, the data receiving and sending module extracts the information in the data packet received by the channel data adapter and sends it to the channel management module, and the channel management module according to The service request information selects the corresponding downlink channel and sends a request to the channel controller to apply for channel resources. The downlink channel includes an IP channel and an HFC channel. The channel controller allocates the corresponding downlink channel according to the request of the channel management module and notifies the channel data adapter Then, the data receiving and sending module stores the service data in the cache according to the service request information and starts the timeout timer, the classifier module classifies the service data in the cache, and the NAT module performs address translation on the service data in the cache , the channel data adapter sends the service data after classification and address translation to the user set-top box through the downlink channel allocated by the channel controller;

Step 2): The user set-top box sends ACK or NAK to the channel data adapter after receiving the classified and address-translated service data, and the channel data adapter sends the ACK or NAK to the data receiving and sending module;

Step 3): If the data receiving and sending module receives ACK, delete the business data in the buffer area;

If the data receiving and sending module receives NAK, or, the data receiving and sending module has neither received ACK nor received NAK beyond the time set by the timeout timer, then the data receiving and sending module judges whether the business data reaches the predetermined value. Set the upper limit of retransmission times: if the upper limit of retransmission times is reached, the data receiving and sending module cancels sending service data to the user set-top box; business data, and start the timeout timer again, and return to step 2).

Compared with the prior art, the beneficial effect of the present invention is: by constructing a collaborative network transmission method that integrates IP bidirectional channels and HFC channels, university transmission of asymmetric bidirectional data channels for media service content is realized. In the multi-channel cooperative transmission system based on IP and HFC, the uplink data is transmitted through the IP two-way channel, and the downlink data can be delivered through the IP two-way channel or the HFC channel. As the gateway device of the user's set-top box, it is located at the front end of the HFC channel. It is used to integrate the two channels of IP bidirectional and HFC channels, and perform NAT forwarding of IP data packets; for data from the server to the terminal, through the channel decision mechanism, select the appropriate The downlink channel is encapsulated and packaged using a corresponding encapsulation protocol, wherein the downlink channel includes an IP channel and an HFC channel. Since the HFC channel has the characteristic of unidirectional order preservation, it is possible to optimize reliable data transmission according to this characteristic of the HFC channel. Based on the characteristics of the fusion network, the present invention optimizes and schedules the resources of the fusion network, improves the efficiency of data transmission, and provides a data channel with QoS guarantee for service data.

Description of drawings

FIG. 1 is a schematic structural diagram of an efficient transmission system in an interactive media service environment of a cloud architecture according to the present invention.

detailed description

The present invention constructs an efficient system network transmission method under the interactive media service environment of the cloud structure, and the method is realized based on a multi-channel transmission system of IP and HFC. In this transmission system, the gateway device is located at the front end of the HFC channel, which is used to integrate the two channels of IP bidirectional and HFC channels, and perform NAT forwarding of IP data packets; The downlink channel is encapsulated and packaged with the corresponding encapsulation protocol. The downlink channel includes IP channel and HFC channel; based on the characteristics of the converged network, the resources of the converged network are optimized and scheduled to improve the efficiency of data transmission and provide business data with Data channel with QoS guarantee.

As shown in Fig. 1, in the present invention, the gateway device includes two layers: a control layer and a data layer.

(1) Control layer

The control layer mainly includes signaling interaction module, frequency point management module, channel management module, terminal management module, AAA client module and SM/PS client module, etc.

(1) Signaling interaction module

The signaling interaction module is responsible for the signaling interaction with terminals and server devices, including the analysis and processing of protocols such as terminal registration, terminal keep-alive, channel management, NAT traversal, and live broadcast configuration.

(2) Channel management module

The channel management module is responsible for channel information management, channel application/closing, channel traffic statistics, etc., and selects an appropriate downlink channel, IP channel or HFC channel or IP+HFC channel, according to request information or business data information.

(3) AAA client module

The AAA client module is responsible for interacting with the AAA server to perform user and business authentication and accounting.

(4) SM/PS client module

The SM/PS client module is mainly responsible for the interaction with SM/PS (service management and policy server) and the management of QoS policy information. This module interacts with SM to identify services; interacts with PS to obtain service QoS policies, supports push and pull types, caches and manages applied policies, and provides operations such as query, addition, and deletion.

(2) Data layer

The data level mainly includes NAT module, classifier module, data receiving and sending module, data priority scheduling module and channel data adapter module, etc.

(1) NAT module

The NAT module is mainly responsible for performing NAT conversion and reverse conversion on IP data packets, managing and maintaining the address mapping relationship, and responsible for the allocation and recovery of virtual addresses and port allocation and recovery.

(2) Classifier module

The main function of this module is to classify and identify the business data flow according to the information in the data packet (including source port, destination port, source IP, destination IP, TOS field, etc.).

(3) Data receiving and sending module

This module is mainly responsible for receiving the complete IP data packets above the third layer (network layer) of the downlink, and analyzing the received IP data packets for the fourth and fifth layer protocols, and obtaining important information such as application data type and priority; this module is also responsible for IP Sending of packets.

(4) Channel data adapter module

The main function of this module is to perform encapsulation conversion and protocol adaptation on the data to be sent, so as to adapt to the selected channel. Each type of channel corresponds to a specific adapter, mainly including HFC narrowcast channel adapter and IP channel adapter, where the HFC channel adapter packs application data or IP packets into TS packets according to the DVB encapsulation format (MPE or ULE, etc.), and generates PSI/SI information, and then send the generated TS packet to the IPQAM device in the form of UDP; the IP channel adapter sends the application data in the form of IP packet to the terminal set-top box through the IP bidirectional channel. The module can also be expanded to add new channel adapters according to network access.

In the multi-channel cooperative transmission system based on IP and HFC of the present invention, the uplink data is transmitted through the IP bidirectional channel, and the downlink data can be delivered through the IP bidirectional channel or the HFC unidirectional channel. Since the HFC channel has the characteristic of unidirectional order preservation, the present invention optimizes the reliable transmission of data aiming at this characteristic of the HFC channel. The present invention considers the data loss problem that may occur when transmitting data based on the IP channel and the HFC channel, and adopts a comprehensive and reliable mechanism to solve it. It is an optimization method for ensuring safe transmission in a new transmission mode based on IP and HFC . The efficient system network transmission process under the cloud-based interactive media service environment includes the following steps:

Step (1): The user set-top box sends a data packet containing authentication and registration information to the data layer of the gateway device. The data layer of the gateway device classifies and translates the address of the received data packet, and then the data layer extracts the information in the data packet and Send to the control layer of the gateway device, and the control layer performs signaling interaction, authentication and registration interaction with the server according to the received information.

Specifically, the data layer of the gateway device may include a channel data adapter, a classifier module, a NAT module, and a data receiving and sending module, and the control layer of the gateway device includes a signaling interaction module, an AAA client and an SM/PS client. The user set-top box sends data packets containing authentication and registration information to the channel data adapter, the classifier module classifies the data packets received by the channel data adapter, and the NAT module performs address translation on the data packets received by the channel data adapter; data receiving and sending The module extracts the information in the classified and address-translated data packets received by the channel data adapter and sends them to the signaling interaction module, AAA client and SM/PS client. The signaling interaction module communicates with the server according to the received information For signaling interaction, the AAA client and the SM/PS client interact with the server for authentication and registration respectively according to the received information.

Step (2): The user set-top box sends service request information to the data layer of the gateway device. The control layer of the gateway device allocates the corresponding downlink channel according to the received service request information from the data layer and notifies the data layer. After data classification and address conversion, the service data is sent to the user's set-top box according to the allocated downlink channel. The data receiving and sending module also includes a timeout timer, and the control layer also includes a channel management module and a channel controller.

Specifically, this step (2) may further include the following steps:

Step 1): The user set-top box sends a data packet containing service request information to the channel data adapter, the data receiving and sending module extracts the information in the data packet received by the channel data adapter and sends it to the channel management module, and the channel management module according to the service request The information selects the corresponding downlink channel and sends a request to the channel controller to apply for channel resources, wherein the downlink channel includes an IP channel and an HFC channel, and the channel controller allocates the corresponding downlink channel according to the request of the channel management module and notifies the channel data adapter; then , the data receiving and sending module stores the service data in the buffer according to the service request information and starts the timeout timer, the classifier module classifies the service data in the buffer, the NAT module performs address translation on the service data in the buffer, and the channel The data adapter sends the classified and address-translated service data to the user set-top box through the downlink channel allocated by the channel controller.

Step 2): The user set-top box sends ACK (Acknowledgment) or NAK (Negative Acknowledgment) to the channel data adapter after receiving the service data after classification and address translation, and the channel data adapter sends the ACK or NAK to the data receiving and sending module.

Step 3): If the data receiving and sending module receives ACK, delete the business data in the buffer area;

If the data receiving and sending module receives NAK, or, the data receiving and sending module has neither received ACK nor received NAK beyond the time set by the timeout timer, then the data receiving and sending module judges whether the business data reaches the predetermined value. Set the upper limit of retransmission times: if the upper limit of retransmission times is reached, the data receiving and sending module cancels sending service data to the user set-top box; business data, and start the timeout timer again, and return to step 2).

Claims (3)

1. the efficient system network transfer method under the interactive medium service environment of cloud framework, is characterized in that, comprise the steps:

(1) subscriber computer top box sends to the data Layer of gateway device the packet comprising certification and log-on message, the data Layer of gateway device is classified and address transition to the packet received, then data Layer extracts the information in packet and sends to the key-course of gateway device, and it is mutual that key-course carries out Signalling exchange and certification and registration according to received information and server;

(2) subscriber computer top box sends service requesting information to the data Layer of gateway device, the key-course of gateway device distributes corresponding down going channel and notification data layer according to the received service requesting information coming from data Layer, and data Layer is classified to business datum and sent business datum according to distributed down going channel to subscriber computer top box after address transition.

2. the efficient system network transfer method under the interactive medium service environment of cloud framework according to claim 1, it is characterized in that: described data Layer comprises channel data adapter, classifier modules, NAT module and data receiver and sending module, described key-course comprises Signalling exchange module, AAA client and SM/PS client; In described step (1), subscriber computer top box sends the packet comprising certification and log-on message to described channel data adapter, classifier modules is classified to the packet that channel data adapter receives, and NAT module carries out address transition to the packet that channel data adapter receives; Data receiver and sending module extract that channel data adapter receives and through classify and address transition packet in information and be sent to described Signalling exchange module, AAA client and SM/PS client, Signalling exchange module carries out Signalling exchange according to received information and server, and described AAA client and SM/PS client carry out the mutual of certification and registration according to received information and server respectively.

3. the efficient system network transfer method under the interactive medium service environment of cloud framework according to claim 2, it is characterized in that: described data receiver and sending module also comprise overtime timer, described key-course also comprises path management module and channel controller;

Described step (2) comprising:

Step 1): subscriber computer top box sends the packet comprising service requesting information to described channel data adapter, data receiver and sending module extract the information in the packet received by channel data adapter and send to path management module, path management module is selected corresponding down going channel according to service requesting information and is sent the request of application channel resource to channel controller, described down going channel comprises IP tunnel and HFC passage, and channel controller is according to the corresponding down going channel of the request dispatching of path management module and notify channel data adapter; Then, business datum is started overtime timer stored in buffer area according to service requesting information by data receiver and sending module, classifier modules is classified to the business datum in buffer area, NAT module carries out address transition to the business datum in buffer area, and the down going channel that described channel data adapter is distributed by channel controller sends the business datum after classification and address transition to subscriber computer top box;

Step 2): subscriber computer top box sends ACK or NAK to described channel data adapter after receiving the business datum after classification and address transition, ACK or NAK is sent to data receiver and sending module by channel data adapter again;

Step 3): if data receiver and sending module receive is ACK, then delete the business datum of buffer area;

If that data receiver and sending module receive is NAK, or, data receiver and sending module exceed time that overtime timer sets and had not both received ACK and also do not receive NAK, then data receiver and sending module judge the number of retransmissions upper limit whether business datum reaches default: if reach the number of retransmissions upper limit, then data receiver and sending module are cancelled and sent business datum to subscriber computer top box; Otherwise data receiver and sending module retransmit the business datum through classifying and after address transition in buffer area to subscriber computer top box, and again start overtime timer, and return step 2).