TWI552585B - Multi-media signal service unit, service system and service method thereof - Google Patents

Description

Service unit, service system and service method of multimedia signal

The present invention relates to a service unit, a service system and a service method thereof, and more particularly to a service unit for a multimedia signal, a service system including the service unit, and a service method thereof.

Streaming. (Streaming) refers to a technology and process of compressing a series of video and audio data and transmitting data through the network segment to instantly transmit audio and video on the network for viewing. The streaming technology can transmit live video or audio and video pre-stored on the server. When the user watches the video, the audio and video data is played by the specific playing software immediately after being delivered to the user's mobile phone or computer.

Today's multimedia streaming platforms are mostly two-tier architectures of origin and edge. The original input stream is issued by the origin server, and multiple edge servers are large. On-demand users provide live broadcast services. In other words, the audio and video materials are present in the source server, and each video material is provided to the user by a fixed edge server.

However, such an architecture cannot quickly and efficiently expand the number of source/edge servers, and if a certain video material is accessed in a large amount, a fixed edge server is difficult to provide sufficient processing performance or bandwidth, and a scanning source servo is required. In order to get the location of the source server where the requested signal is located, this situation is nothing more than an additional burden in the case of large-scale subordinates. In addition, when there is an obstacle in the multimedia streaming platform, such an architecture needs to transfer the video and audio data to the backup system from the backup system to provide the user with a delay in the service.

Therefore, how to propose a way to overcome the aforementioned problems is an issue that is currently to be solved in the industry.

In order to solve at least the above problems, the present invention provides a service unit for a multimedia signal, which is a multimedia signal provided by a provider, the service unit comprising: a plurality of servers and guiding devices, the plurality of servers for storing the multimedia signal And the guiding device determines an optimal server according to the load of each server in the plurality of servers to direct the multimedia signal to the optimal server, and stores the multimedia signal in the optimal server And the guiding device further records the correspondence between the multimedia signal and the optimal server; wherein, when the receiver requests the access to the multimedia signal through the network, the receiver transmits the multimedia signal according to the guiding device The correspondence between the best servers is obtained from the network by the multimedia signal provided by the optimal server.

The present invention further provides a service system for a multimedia signal, comprising: two service units, respectively receiving the same multimedia signals provided by the provider, and the two service units each include a guiding device and a plurality of servers, In any of the service units, the guiding device determines an optimal server according to the load of each of the plurality of servers to guide the multimedia signal Going to the optimal server, storing the multimedia signal in the optimal server, the guiding device further recording the correspondence between the multimedia signal and the optimal server; and a plurality of access nodes for receiving When the request for accessing the multimedia signal is made by the plurality of access nodes, one of the plurality of access nodes is connected to one of the two service units, and the one of the two service units And the guiding device obtains, by the one of the plurality of access nodes, the best server provided by the one of the two service units according to the correspondence between the multimedia signal and the optimal server a multimedia signal; wherein, when the one of the plurality of access nodes is connected to the one of the two service units and the one of the two service units does not respond, the plurality of access nodes are One of the two service units is connected to the other, and the receiver is connected to the other of the two service units according to the multimedia signal and the optimal server. This should be a relationship in which, from the plurality of access node obtains the multimedia signal provided by the other of the two persons in the service unit of the preferred server.

The present invention further provides a service system for a multimedia signal, comprising: a propagation unit that receives a multimedia signal provided by a provider; and two service units interconnected with each other and respectively connected to the propagation unit, and the two service units are respectively The device includes a navigation device and a plurality of servers; wherein the communication unit selects one of the two service units according to a distance cost between the provider and the two service units to propagate the multimedia signal to the selected service unit; And the guiding device of the selected service unit determines an optimal servo according to the load of each server in the plurality of servers of the two service units. And directing the multimedia signal to the optimal server to store the multimedia signal in the optimal server; and the guiding devices of the two service units further record the correspondence between the multimedia signal and the optimal server The communication unit selects a service unit based on the distance between the two service units and the receiver when the receiver requests the access to the multimedia signal through the network, and the receiver selects the service unit through the reselection The guiding device of the service unit obtains the multimedia signal provided by the optimal server of the selected service unit from the network according to the correspondence between the multimedia signal and the optimal server.

The present invention provides a service method for a multimedia signal, which is applied to a service unit including a navigation device and a plurality of servers, the service method comprising: causing a provider to provide a multimedia signal to the service unit; The load of the plurality of servers determines an optimal server to direct the multimedia signal to the optimal server, stores the multimedia signal to the optimal server, and causes the guiding device to further store the multimedia signal and Corresponding relationship of the optimal server; and when the receiver requests the access to the multimedia signal through the network, the receiver is caused by the guiding device according to the correspondence between the multimedia signal and the optimal server The network obtains the multimedia signal provided by the best server.

The invention facilitates the expansion of the number of servers, can determine the server for storing the multimedia signal according to the load of the server, and can also provide the function of the user's non-inductive switching by using two mutually redundant service units, and can be used in multiple services. The unit finds the appropriate server in the horizontal direction to store the multimedia signal, thereby solving the problem that the prior art server load is too high to provide the service and needs to scan the source. The server can get the problem of the location of the source server where the requested signal is located, effectively utilize the server resources and reduce the cost caused by the scanning.

1, 1'‧‧‧ Provider

2‧‧‧Communication unit

3, 3a, 3b‧‧‧ service unit

30a, 30b‧‧‧ server group

31a, 31b, 31c‧‧‧ server

32, 32a, 32b‧‧‧ guiding equipment

33a, 33b‧‧‧ exchanger

4, 6‧‧‧ network

4’‧‧‧CDN

6’‧‧‧VPN

41, 42‧‧‧ access nodes

5‧‧‧ Receiver

5’‧‧‧Users

7‧‧‧ backbone network

Live1, Live2, Live3, Live4, Live5, Live6, Live7, Live8, Live9, Live10‧‧‧ Server

S21~S23‧‧‧Steps

S41~S43‧‧‧Steps

S61~S64‧‧‧Steps

1 is a block diagram of a first embodiment of a multimedia signal service system of the present invention; FIG. 2 is a flow chart of a first embodiment of a multimedia signal service method according to the present invention; and FIG. 3 is a multimedia signal of the present invention; Figure 4 is a block diagram of a second embodiment of the multimedia signal service method of the present invention; and Figure 5 is a block diagram of a third embodiment of the multimedia signal service system of the present invention. Figure 6 is a flow chart of a third embodiment of the multimedia signal service method of the present invention; and Figure 7 is a schematic diagram of a specific embodiment of the multimedia signal service system of the present invention.

The embodiments of the present invention are described below by way of specific examples, and those skilled in the art can readily appreciate other advantages and advantages of the present invention. The structure, the proportions, the sizes and the like of the present invention are only used in conjunction with the disclosure of the specification for the understanding and reading of those skilled in the art, and are not intended to limit the conditions for the implementation of the present invention. Therefore, any modification, alteration or adjustment does not affect the invention. The effects that can be achieved and the objects that can be achieved are still within the scope of the technical content disclosed in the present invention.

[First Embodiment]

Referring to FIG. 1, the service unit 3 of the present invention includes servers 31a, 31b, and 31c and a guiding device 32, and is configured to receive the multimedia signal provided by the provider 1, and then provide the multimedia signal to the receiver 5.

The provider 1 can be a RTMP-enabled camera or a content provider such as an RTMP video server, and the multimedia signal provided is transmitted to the service unit in the format of Real Time Messaging Protocol (RTMP). 3. The receiver 5 can be a user device, such as a mobile phone or a computer, which carries an operating system such as iOS, Windows, Android, and the like. This embodiment does not limit the number of providers 1 and receivers 5.

In the service unit 3, the servers 31a, 31b and 31c respectively store the multimedia signals, and the guiding device 32 determines an optimal server according to the load of the servers 31a, 31b and 31c (if the lowest load is the most a good server, but not limited thereto, to direct the multimedia signal to the optimal server, and store the multimedia signal in the optimal server, wherein the optimal server transmits the signal and Correspondence information of the server is sent to the guiding device 32, and the corresponding relationship between the different multimedia signals and the servers provided by the different providers 1 is recorded in the mapping device 32 in a correspondence table.

When the receiver 5 requests the access to the multimedia signal through the network 4, the receiver 5 can be based on the multimedia signal and the best via the guiding device 32. Corresponding relationship between the servers, the multimedia signal provided by the optimal server is obtained through the network 4. The network 4 is a content delivery network (CDN), and may include a plurality of access nodes (not shown in the figure). When the receiver 5 requests the access to the multimedia signal through the network 4, the network 4 One of the plurality of access nodes is connected to the service unit 3, and the optimal server converts the stored multimedia signal to the access node, for example, the format of the multimedia signal from the RTMP The file is transferred to an HLS (HTTP Live Streaming), HDS (HTTP Dynamic Streaming), HSS (HTTP Smooth Streaming) format, etc., so that the receiver 5 can obtain the transit provided by the optimal server through one of the access nodes. The multimedia signal of the file.

In this embodiment, different multimedia signals provided by different providers 1 may be stored in different servers 31a, 31b or 31c, depending on the load of the servers 31a, 31b and 31c, where the load may refer to the server. The optimal server is, for example, the server with the lowest load, such as the processing power, the memory, or the bandwidth or flow that can be provided. When the receiver 5 requests the access to the multimedia signal in the network 4, the optimal server can temporarily store the stored multimedia signal to one of the access nodes in the network 4, and the receiver 5 The multimedia signal on one of the access nodes can be directly accessed, which can also be regarded as a cache mechanism.

Accordingly, the present embodiment can expand the number of servers horizontally according to requirements, without the overall architecture of the transaction service unit, and an unlimited number of guiding devices can also programmatically perform the intelligent direction of the multimedia signal request, so-called programmatic recording. Signal and server correspondence, and provide guidance Prepare for the basis of guidance. Its service system is combined with the CDN to provide a dynamic cache mechanism for the receiver to access multimedia signals.

Referring to FIG. 2 again, a service method corresponding to the multimedia signal of the first embodiment is schematically illustrated.

In step S21, the provider provides the multimedia signal to the service unit, and then proceeds to step S22; in step S22, the guiding device of the service unit determines an optimal servo according to the load of each server in the plurality of servers of the service unit. And the guiding device further records the correspondence between the multimedia signal and the optimal server, and then proceeds to step S23; in step S23, the receiver transmits the multimedia signal to the optimal server for storage. The network requests the access to the multimedia signal, and the guiding device obtains the multimedia signal provided by the optimal server according to the correspondence between the multimedia signal and the optimal server.

In addition, the step S22 further includes: the step of the step S23 further: the receiver is configured to save the message that the multimedia signal is stored in the optimal server to the guiding device; When the request for the multimedia signal is received, one of the plurality of access nodes in the network is connected to the service unit, and then the guiding device directs the request to the corresponding relationship between the multimedia signal and the server. Corresponding server, the server converts the stored multimedia signal and transmits the converted multimedia signal to the access node, so that the receiver can access the converted multimedia signal from the access node .

[Second embodiment]

Referring to FIG. 3, the service system of the present embodiment includes two service units 3a and 3b, wherein the service units 3a and 3b of the present embodiment have the same structure and function as the service unit 3 of the first embodiment, that is, The server 31a, 31b and 31c and the guiding device 32 are included, and the guiding device 32 determines an optimal server according to the load of the servers 31a, 31b and 31c to direct the received multimedia signal to the optimal server for storing the The multimedia signal, the guiding device further records the correspondence between the multimedia signal and the optimal server. In addition, in FIGS. 1 and 3, the same or similar elements are denoted by the same reference numerals.

The difference is that in the present embodiment, the provider 1 provides two identical multimedia signals to the service units 3a and 3b. When the receiver 5 requests a request for accessing the multimedia signal through the network 4, one of the access nodes 41 and 42 of the network 4 is connected to one of the service units 3a and 3b to make the service unit The best server in one of the service units 3a or 3b converts the stored multimedia signal to the one of the access nodes 41 or 42 so that the receiver 5 can be at the one of the access nodes 41 or 42 accessing the transcoded multimedia signal. In addition, if one of the service units 3a or 3b connected to one of the access nodes 41 or 42 does not respond, the one of the access nodes 41 or 42 can connect to another service unit (for example, if the connection is If the service unit 3a has no response, then the service unit 3b is connected; vice versa).

This embodiment can be regarded as a unicast mode. Each of the service units 3a or 3b is provided with a virtual host to have a respective network address (IP), so that the provider 1 can transmit two identical multimedia signals to the same. Two Network address. Therefore, in this embodiment, the service units 3a and 3b can mutually support each other. When one of the service units 3a or 3b cannot provide the multimedia signal, the network 4 immediately switches to another service unit to transfer the multimedia. The signal is captured to one of the access nodes 41 or 42 for access by the receiver 5. Accordingly, the effect of switching the user using the receiver 5 without feeling is achieved.

Referring to FIG. 4 again, a service method corresponding to the multimedia signal of the second embodiment is schematically illustrated.

In step S41, the provider provides the same multimedia signal to the two service units, and then proceeds to step S42; in step S42, one of the service units directs the device according to the load of each server in the plurality of servers of the service unit. Determining an optimal server to direct the multimedia signal to the optimal server for storage, and the guiding device records the correspondence between the multimedia signal and the optimal server; another guiding device of another service unit Determining another optimal server according to the load of each server in the plurality of servers of the another service unit to direct the multimedia signal to the other server for storage, and the other guiding device records the multimedia signal Corresponding to the other optimal server, proceeding to step S43; in step S43, the receiver requests the access to the multimedia signal in the network, and the navigation device according to the multimedia signal and the most Corresponding relationship between the servers, through which the multimedia information provided by the best server of one of the two service units is obtained ; And wherein at a time of the service unit does not respond, the receiver obtains further referred to by the other service unit of the two units of the best service server via the network For the same multimedia signal.

In addition, step S42 further includes: in any one of the two service units, the best/other optimal server transmits "the multimedia signal is stored in the best/other optimal server" The step of the message to the guiding device; the step S43 further comprises: when the receiver makes the request through the network, one of the plurality of access nodes in the network is connected to the one of the service units, Then, the best server of the one of the service units converts the stored multimedia signal to transmit the transferred multimedia signal to the one of the access nodes, so that the receiver can access from the access node. The steps of the converted multimedia signal.

[Third embodiment]

Referring to FIG. 5, the service system of this embodiment includes two service units 3a and 3b, wherein the service units 3a and 3b of the present embodiment have the same structure and function as the service unit 3 of the first embodiment. In addition, in FIGS. 1 and 5, the same or similar elements are denoted by the same reference numerals.

The difference is that the service system of this embodiment further includes a communication unit 2 representing the virtual Anycast location of the service units 3a and 3b, and the service units 3a and 3b are connected to each other by the network 6, such as a virtual private network. (virtual provate network; VPN). The propagation unit 2 receives the multimedia signal provided by the provider 1. The propagation unit 2 first selects one of the distance costs of the provider 1 and the service units 3a and 3b to propagate the multimedia signal to the selected service unit 3a or 3b, the direction of the selected service unit 3a or 3b The device then determines an optimal server according to the load of the servers 31a, 31b and 31c to direct the multimedia signal to the optimal server. The multimedia signal is stored, and the guiding devices 32 of the service units 3a and 3b further record the correspondence between the multimedia signal and the optimal server.

When the receiver 5 requests the access to the multimedia signal through the network 4, the propagation unit 2 selects a service unit according to the distance cost between the service units 3a and 3b and the receiver 5, and the receiver 5 transmits the reselected service unit. The guiding device obtains the multimedia signal provided by the optimal server of the selected service unit 3a or 3b through the network 4 according to the correspondence between the multimedia signal and the optimal server.

Further, one of the plurality of access nodes (not shown in the figure) of the network 4 is connected to the determined service unit 3a or 3b, and then the determined service unit 3a or 3b The best server will transfer the stored multimedia signal to the one of the access nodes, so that the receiver 5 can obtain the best of the determined service unit 3a or 3b through the one of the access nodes. The multimedia signal provided by the server.

This embodiment can be regarded as an anycast mode. Although it has two service units 3a and 3b as in the second embodiment, the propagation unit 2 can determine the distance between the provider 1 and the service units 3a and 3b. The service unit receives the multimedia signal, so the communication unit 2 can be regarded as a virtual host and has a network address for the provider 1 to transmit the multimedia signal to the network address. The propagation unit 2 can also select a service unit based on the uplink state of the service units 3a and 3b. Accordingly, the provider 1 can transmit the multimedia signal to a server 31a, 31b or 31c in a service unit 3a or 3b, that is, through the intelligent selection of the propagation unit 2 and the stylized guidance of the guiding device 32, finding the most suitable one. Server to access multimedia signals, Take advantage of all server resources and fault tolerance.

Referring to FIG. 6 again, a service method corresponding to the multimedia signal of the third embodiment is schematically illustrated.

In step S61, the provider provides the multimedia signal to the service system, and then proceeds to step S62; in step S62, the propagation unit in the service system is based on the distance between the provider and the two service units or the uplink of the two service units. Selecting a service unit to propagate the multimedia signal to the selected service unit, and then proceeding to step S63; in step S63, the selected service unit guiding device is based on the plurality of selected service units The load of each server in the server determines an optimal server to direct the multimedia signal to the optimal server for storage, and the guiding devices of the two service units store the multimedia signal and the optimal server. Corresponding relationship, then proceeds to step S64.

In step S64, the receiver requests the access to the multimedia signal in the network, and the propagation unit selects a service unit according to the distance between the receiver and the second service unit to pass the reselected service unit. The guiding device, through which the multimedia signal provided by the selected service unit is obtained.

In addition, the step S63 further includes: the step of the optimal server of the selected service unit simultaneously transmitting the message “the multimedia signal is stored in the optimal server” to the guiding device of the two service units; step S64 The method further includes: when the receiver sends the request through the network, one of the plurality of access nodes in the network is connected to the Reselecting the service unit to learn the correspondence between the multimedia signal and the optimal server from the guiding device of the reselected service unit, and then the optimal server of the selected service unit will The stored multimedia signal is transferred to transmit the transposed multimedia signal to the one of the access nodes, so that the receiver can access the converted multimedia signal from the access node.

A specific embodiment is given, but not limited thereto. Referring to FIG. 7, the server group 30a, the guiding device 32a, and the switch 33a are disposed in the south area, the server group 30b, the guiding device 32b, and the switch 33b are disposed in the north area, and the south area and the north area are VPN. 6' is connected through the backbone network 7. The provider 1' provides two identical multimedia signals to the south and north regions, wherein the guiding device 32a determines an optimal server according to the loads of the servers Live1, Live2, Live3, Live4 and Live5 in the server group 30a. For example, Live3, the multimedia signal is directed to the optimal server Live3 for storage; likewise, the guiding device 32b determines an optimal servo according to the load of the servers Live6, Live7, Live8, Live9, and Live10 in the server group 30b. For example, Live6, the multimedia signal is directed to the optimal server Live6 for storage. When the user 5' connects to the CDN 4' by using the user device to request the access to the multimedia signal, the cache device in the CDN 4' is connected to the north area according to the preset, and when the north area is abnormal, the cache device will Automatically switch to the Southern District Service Unit to provide user services.

It should be noted that the present invention does not limit the number of service units, servers, navigation devices, providers, receivers, switches, etc. mentioned in this specification or the drawings.

In summary, the present invention can select a service unit to be transmitted depending on the status of multiple service units, and can determine the server to store the multimedia signal according to the load of the server in the service unit, and connect the two services through the private network. In this way, the unit can effectively utilize the server resources, and at the same time can provide the function of fast switching between the two service units of the backup, so that the user can switch without feeling when the obstacle occurs.

The above-described embodiments are merely illustrative of the effects of the present invention, and are not intended to limit the present invention, and those skilled in the art can modify and modify the above-described embodiments without departing from the spirit and scope of the invention. . Therefore, the scope of protection of the present invention should be as set forth in the appended claims.

1‧‧‧provider

3‧‧‧Service Unit

31a, 31b, 31c‧‧‧ server

32‧‧‧Directional equipment

4‧‧‧Network

5‧‧‧ Receiver

Claims (10)

A service unit for receiving a multimedia signal, which is a multimedia signal provided by a provider, the service unit comprising: a plurality of servers for storing the multimedia signal; and a guiding device according to each server in the plurality of servers The load determines an optimal server to direct the multimedia signal to the optimal server, and stores the multimedia signal to the optimal server, and the guiding device further records the correspondence between the multimedia signal and the optimal server a relationship, wherein the receiver obtains the request for accessing the multimedia signal through the network, and the receiver obtains from the network according to the correspondence between the multimedia signal and the optimal server through the guiding device The multimedia signal provided by the server. The service unit of claim 1, wherein the optimal server transmits the message that the multimedia signal is stored in the optimal server to the guiding device, so that the guiding device records the multimedia signal. Corresponding to the optimal server, the receiver obtains, by the guiding device, the multimedia signal provided by the optimal server according to the correspondence between the multimedia signal and the optimal server. The service unit of claim 1, wherein the network includes a plurality of access nodes for the plurality of accesses when the receiver requests the access to the multimedia signal through the network. One of the nodes is connected to the service unit to be based on the multimedia message Corresponding relationship between the number and the optimal server, the best server corresponding to the multimedia signal transmits the multimedia signal stored by the multimedia signal to one of the plurality of access nodes, and the receiver is enabled The multimedia signal provided by the optimal server is obtained by one of the plurality of access nodes. The service unit of claim 3, wherein the optimal server converts the stored multimedia signal to transmit the transposed multimedia signal to the one of the plurality of access nodes. And causing the receiver to obtain the translated multimedia signal provided by the optimal server through the one of the plurality of access nodes. A service system for a multimedia signal, comprising: two service units, respectively receiving the same multimedia signals provided by the provider, and the two service units each comprise a guiding device and a plurality of servers, in any of the services In the unit, the guiding device determines an optimal server according to the load of each of the plurality of servers, to direct the multimedia signal to the optimal server, and stores the multimedia signal in the optimal server, where The guiding device further records the correspondence between the multimedia signal and the optimal server; and the plurality of access nodes are configured to: when the receiver requests to access the multimedia signal, one of the plurality of access nodes Connecting to the one of the two service units, so that the receiver transmits the plurality of access nodes through the corresponding relationship between the multimedia signal and the optimal server through the guiding device of the one of the two service units One of the two is obtained by the one of the two service units The multimedia signal provided by the optimal server; wherein the one of the plurality of access nodes is connected to the one of the plurality of access nodes and the one of the two service units does not respond And causing the one of the plurality of access nodes to connect to the other of the two service units, and causing the receiver to pass the multimedia signal to the other of the two service units The best server correspondence, the one of the plurality of access nodes obtaining the multimedia signal provided by the best server of the other of the two service units. A service system for a multimedia signal, comprising: a communication unit that receives a multimedia signal provided by a provider; and two service units interconnected with each other and respectively connected to the propagation unit, and the two service units each include a guiding device and a plurality of servers; wherein the propagation unit selects one of the two service units based on a distance between the two service units and the provider to propagate the multimedia signal to the selected service unit; The guiding device of the selected service unit further determines an optimal server according to the load of each server in the plurality of servers to direct the multimedia signal to the optimal server, and stores the multimedia signal at the optimal server. The server and the guiding device of the two service units further record the correspondence between the multimedia signal and the optimal server, and when the receiver requests the access to the multimedia signal through the network, the propagation ticket Reselecting one of the two service units according to the distance between the two service units and the receiver, and the receiver transmits the multimedia signal to the optimal server according to the guiding device of the reselected service unit Corresponding relationship, the multimedia signal provided by the best server of the selected service unit is obtained from the network. The service system of claim 6, wherein the network comprises a plurality of access nodes for the plurality of accesses when the receiver requests the access to the multimedia signal through the network. One of the nodes is connected to the selected service unit to cause the best server of the selected service unit to transmit the multimedia signal to the one of the plurality of access nodes, such that Receiving, by the receiving device of the reselected service unit, the receiver obtains the most selected one of the selected service units from the one of the plurality of access nodes according to the correspondence between the multimedia signal and the optimal server The multimedia signal provided by the server. A service method for a multimedia signal is applied to a service unit including a navigation device and a plurality of servers, the service method comprising: causing a provider to provide a multimedia signal to the service unit; and causing the navigation device to use the plurality of servers according to the plurality of servers The load determines an optimal server to direct the multimedia signal to the optimal server, stores the multimedia signal to the optimal server, and causes the guiding device to further store the multimedia signal and the optimal servo Correspondence between the devices; and the request for the receiver to access the multimedia signal through the network And receiving, by the guiding device, the multimedia signal provided by the optimal server from the network according to the correspondence between the multimedia signal and the optimal server. The service method of claim 8, further comprising the step of: when the receiver requests the access to the multimedia signal through the network, one of a plurality of access nodes in the network Connecting to the service unit to enable the best server corresponding to the multimedia signal to transfer the stored multimedia signal to transmit the transposed multimedia signal to the one of the plurality of access nodes. And causing the receiver to obtain the translated multimedia signal provided by the optimal server through the one of the plurality of access nodes. The service method of claim 9, further comprising the step of: when the guiding device directs the multimedia signal to the optimal server to store the multimedia signal, the optimal server transmits the multimedia signal system And storing, in the optimal server, the information to the guiding device, so that the guiding device records the correspondence between the multimedia signal and the optimal server, so that one of the plurality of access nodes is connected to the service unit When the multimedia signal is stored in the best server, the message is known.