An apparatus for implementing unidirectional multicast function based on G.hn technology

Abstract

The application discloses a device for realizing unidirectional multicast function based on G.hn technology, which comprises a G.hn pusher placed in a front-end machine room, a plurality of G.hn receivers placed in a home as user terminals, coaxial cable connections between the G.hn receivers and the G.hn pusher, each G.hn receiver being capable of joining a multicast group with the G.hn pusher as a multicast source, the G.hn pusher sending multicast data to the multicast group for each G.hn receiver in the multicast group to receive, and the multicast data being cable television service data. All G.hn receivers under the coaxial cable can receive, and the number of the G.hn receivers is unlimited. The application breaks the limitation of traditional technology, redefines the G.hn pusher end and the receiver end, adopts OFDM modulation mode to achieve 4096 QAM modulation, realizes transmission of 8K ultra-high-definition video and VR high-quality service, and provides strong technical support for digital transformation of the cable television industry and future network reconstruction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of television network transmission, in particular to a device for realizing unidirectional multicast function based on G.hn technology. BACKGROUND

[0002] With the continuous emergence of new services, users' pursuit of service experience continues to improve, higher definition, more screens, more viewing ways are driving the development of emerging technologies and devices, and the cable television industry expects to lead video services to meet the requirements of home video experience through high speed, low latency, large bandwidth and full sharing mode. At present, the frequency resource of the cable television industry is increasingly scarce, and due to network limitations, the maximum use of 256QAM modulation is used in the traditional cable television business modulation mode, and the spectrum utilization is low.

[0003] The emergence of G.hn technology provides a high-speed wired carrier communication solution for the access network, and G.hn technology has unique advantages in the application of cable television networks. Using coaxial cable as the transmission medium, there is no need to build new transmission lines, and when transmitting IP multicast services using cable television coaxial cable resources, it has the advantages of anti-interference, large bandwidth, low delay and no packet loss. At present, the network architecture of IP multicast service transmission based on G.hn technology is as shown in Figure 1 The service data of the IP multicast service source passes through the cable television core network, and is then distributed by the coaxial distribution network, transmitted to the G.hn parent terminal located in the home based on the coaxial cable, and the G.hn parent terminal transmits data to the G.hn child terminal, thereby realizing the transmission of IP multicast service data.

[0004] However, due to the characteristics of the traditional G.hn technology, the parent terminal and the child terminal of the G.hn must be paired for bidirectional communication to normally transmit data, and at most 16 child terminals can be connected to one parent terminal, which cannot be used in a unidirectional network environment. Therefore, even if the cable television service is encapsulated and transmitted to the network edge using IP multicast technology, at most 16 user equipment can receive the IP multicast service stream, which cannot meet the requirement of a large number of users simultaneously obtaining a service. SUMMARY

[0005] In order to solve the technical problems in the prior art that only 16 user equipment can receive the IP multicast service stream and cannot meet the requirement of a large number of users simultaneously obtaining a service, the present application provides a device for realizing unidirectional multicast function based on G.hn technology, which uses IP multicast to transmit the data of the cable television service based on G.hn technology, and is applied in a unidirectional network environment of a traditional cable television. In a unidirectional network, one G.hn parent terminal device transmits data, and all child terminals receive data, and the number of child terminals is unlimited, thereby meeting the requirement of a large number of users simultaneously obtaining a service.

[0006] To this end, the application provides the following technical solutions:

[0007] In one aspect, the application provides a device for realizing unidirectional multicast function based on G.hn technology, which comprises:

[0008] a G.hn pusher placed in a front-end machine room;

[0009] a plurality of G.hn receivers placed in a home as user terminals; the G.hn receivers are connected with the G.hn pusher through coaxial cables, and each of the G.hn receivers can join a multicast group with the G.hn pusher as a multicast source;

[0010] the G.hn pusher sends multicast data to the multicast group so as to be received by each G.hn receiver in the multicast group; the multicast data is cable television service data.

[0011] Further, the G.hn pusher roundly sends a configuration resource table in the multicast group.

[0012] Further, after the G.hn receiver is online, information is received, service resources are acquired according to carriers and multicast streams described in the table, and are transmitted to a set-top box terminal.

[0013] Further, the number of the G.hn receivers is unlimited.

[0014] In another aspect, the application further provides an IP multicast service transmission system, which comprises an IP multicast service source, a G.hn pusher, an optical transmitting platform, a plurality of optical receiving platforms, a plurality of G.hn receivers, and a plurality of set-top boxes / television sets; wherein:

[0015] The IP multicast service source, the G.hn pusher, the optical transmitting platform, and the optical receiving platforms are located in a front-end machine room; the IP multicast service source, the G.hn pusher, and the optical transmitting platform are connected in sequence, and data transmission and reception are performed between the optical transmitting platform and the optical receiving platforms based on a cable television core network.

[0016] The G.hn receivers and the set-top boxes / television sets are located in a home; the G.hn receivers are connected with the set-top boxes / television sets, and the optical receiving platform in the front-end machine room and the G.hn receivers in the home perform data transmission and reception based on a coaxial distribution network.

[0017] In another aspect, the application further provides an IP multicast service transmission method, which applies the above-mentioned IP multicast service transmission system and comprises:

[0018] The G.hn pusher modulates received service source data into coaxial signals;

[0019] The modulated coaxial signals enter an optical transmitting platform in a front end;

[0020] The optical receiving platform is transmitted to each sub-front end through a cable television core network;

[0021] The optical receiving platform demodulates the optical signal into a coaxial signal and transmits the coaxial signal to a G.hn receiver in each family in the form of multicast transmission.

[0022] The G.hn receiver transmits the acquired service resource to a set-top box terminal.

[0023] Advantages and positive effects of the present application:

[0024] The present application breaks the limitation of traditional technology, redefines the original G.hn parent end as a push stream end and the original G.hn child end as a receiving end, and the push stream end and the receiving end do not need to be paired. The two-way communication mechanism of the original G.hn parent end and the original G.hn child end is modified into a one-way communication mechanism in which the push stream end transmits cable television service data to the receiving end in the form of multicast. The OFDM modulation mode is used to achieve a maximum of 4096 QAM modulation to realize the transmission of 8K ultra-high-definition video and VR high-quality services. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below.

[0026] Figure 1 A network architecture diagram of IP multicast service transmission based on G.hn technology in the prior art;

[0027] Figure 2 A network architecture diagram of an IP multicast service transmission system based on G.hn technology in the embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0029] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of the application, as well as the above-described drawings, are used to distinguish between similar objects and not necessarily describe a particular sequential or chronological order. It is to be understood that the use of data so designated is not meant to limit a given embodiment to a specific embodiment, unless otherwise understood from the specification. Moreover, the terms "comprising" and "including" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that comprises a list of steps or units not merely those stated in the specification itself. It is to be understood that such an embodiment can include other steps or units not specifically recited in the specification.

[0030] The application proposes a device for realizing unidirectional multicast function based on G.hn technology, comprising:

[0031] A G.hn pusher placed in a front-end machine room;

[0032] A G.hn receiver placed in a home as a user end; the G.hn receiver can be multiple, and the number is unlimited;

[0033] The multiple G.hn receivers can join a multicast group with the G.hn pusher as a multicast source; the G.hn pusher sends multicast data to the multicast group so that each G.hn receiver in the multicast group receives; the multicast data is cable TV service data. The G.hn pusher sends a configuration resource table in the group, and the G.hn receiver receives the information after being online, and obtains service resources according to the carrier and multicast flow and other related information described in the table, and transmits to a set-top box terminal.

[0034] Multicast transmission refers to realizing point-to-multipoint network connection between a sender and each receiver. If a sender transmits the same data to multiple receivers at the same time, only one copy of the same data packet is needed, which improves data transmission efficiency and reduces the possibility of backbone network congestion.

[0035] In the multicast transmission method of this invention embodiment, the sender of the information is called the "multicast source," i.e., the G.hn pusher, and the receiver of the information is called the "multicast group." Receivers joining the same multicast group can be widely distributed anywhere in the network; the "multicast group" has no geographical limitations, i.e., the G.hn receiver. Assuming that only G.hn receiver 1, G.hn receiver 2, and G.hn receiver 3 need the information, when using multicast, these hosts can join the same multicast group. The multicast source, i.e., the G.hn pusher, only needs to send one copy of the information to this multicast group. Each router in the network then replicates and forwards this information according to the distribution of members in the multicast group. Finally, the information will be accurately sent to G.hn receiver 1, G.hn receiver 2, and G.hn receiver 3.

[0036] In this invention, the working mode of the G.hn protocol is redefined, the pairing operation mode between the child end and the mother end and the two-way communication restriction are removed, and the operation architecture of the push end and the receiver end is adopted. That is, one push end corresponds to N receiver ends. The push end sends multicast data, and all receiver ends under the coaxial cable can receive it. This device can operate completely in the traditional one-way network environment of broadcasting.

[0037] like Figure 2 As shown, it illustrates the architecture of an IP multicast service transmission system established using the device for implementing unidirectional multicast function based on G.hn technology proposed in this invention. The system includes: an IP multicast service source, a G.hn streamer, an optical transmission platform, several optical receiving platforms, several G.hn receivers, and several set-top boxes / televisions; wherein:

[0038] The IP multicast service source, G.hn streamer, optical transmission platform, and optical reception platform are located in the front-end equipment room; the IP multicast service source, G.hn streamer, and optical transmission platform are connected in sequence, and the optical transmission platform and optical reception platform transmit and receive data based on the cable TV core network;

[0039] The G.hn receiver and set-top box / TV are located within the home; the G.hn receiver and set-top box / TV are connected, and the optical receiving platform in the front-end equipment room and the G.hn receiver in the home transmit and receive data based on a coaxial distribution network.

[0040] When using the aforementioned IP multicast service transmission system to transmit IP multicast service data, the specific steps include:

[0041] S1 and G.hn transmitters modulate the received service source data into a coaxial signal;

[0042] The frequency range of the coaxial signal is 5-200MHz;

[0043] S2, the modulated coaxial signal enters the optical transmitting platform of the front end;

[0044] S3, transmitted to the optical receiving platform of each sub-front end through the cable TV core network;

[0045] S4, the optical receiving platform demodulates the optical signal into a coaxial signal and transmits it to the G.hn receiver in each home;

[0046] S5, the G.hn receiver transmits the acquired service resources to the set-top box terminal.

[0047] In several embodiments provided by the present application, it should be understood that the disclosed technology can be implemented in other ways. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units can be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0048] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0049] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0050] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for implementing unidirectional multicast function based on G.hn technology, characterized in that, The device includes: G.hn streamers are placed in the front-end server room; Several G.hn receivers are placed in the home as user terminals; the G.hn receivers are connected to the G.hn streamer via coaxial cables, and each G.hn receiver can join a multicast group with the G.hn streamer as the multicast source; The G.hn streamer sends multicast data to the multicast group so that each G.hn receiver in the multicast group can receive it; the multicast data is cable television service data. The device operates in a unidirectional network environment, and the communication between the G.hn pusher and the G.hn receiver is unidirectional.

2. The device for implementing unidirectional multicast function based on G.hn technology according to claim 1, characterized in that, The G.hn streamer sends the configuration resource table in a round-robin fashion within the multicast group.

3. The device for implementing unidirectional multicast function based on G.hn technology according to claim 2, characterized in that, After the G.hn receiver goes online, it receives information, acquires service resources according to the carrier and multicast stream described in the configuration resource table, and transmits them to the set-top box terminal.

4. An IP multicast service transmission system, characterized in that, include: IP multicast service source, G.hn streamer, optical transmission platform, several optical receiving platforms, several G.hn receivers, several set-top boxes / TVs; among which: The IP multicast service source, G.hn streamer, optical transmission platform, and optical reception platform are located in the front-end equipment room; the IP multicast service source, G.hn streamer, and optical transmission platform are connected in sequence, and the optical transmission platform and optical reception platform transmit and receive data based on the cable TV core network; The G.hn receiver and set-top box / TV are located within the home; the G.hn receiver and set-top box / TV are connected, and the optical receiving platform in the front-end equipment room and the G.hn receiver in the home transmit and receive data based on a coaxial distribution network; The system operates in a unidirectional network environment, and the communication between the G.hn pusher and the G.hn receiver is unidirectional.

5. A method for transmitting IP multicast services, characterized in that, The IP multicast service transmission system according to claim 4 includes: The G.hn thruster modulates the received service source data into a coaxial signal; The modulated coaxial signal enters the optical transmission platform at the front end; The optical receiver is transmitted to each distribution headend platform via the cable television core network. The optical receiving platform then demodulates the optical signal into a coaxial signal, which is then transmitted to the G.hn receivers in each household via multicast. The G.hn receiver transmits the acquired service resources to the set-top box terminal.

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