CN102938743B

CN102938743B - Data transmission method and device

Info

Publication number: CN102938743B
Application number: CN201210406368.9A
Authority: CN
Inventors: 赵翠; 朱里越; 崔竞飞; 欧阳峰
Original assignee: Academy of Broadcasting Science of SAPPRFT
Current assignee: National news publishes broadcast research institute of General Bureau of Radio, Film and Television
Priority date: 2012-10-23
Filing date: 2012-10-23
Publication date: 2016-06-15
Anticipated expiration: 2032-10-23
Also published as: CN102938743A

Abstract

The present invention provides a kind of data transmission method and device, wherein data transmission method includes receiving service signal, carrying signal type in service signal, signal type includes broadcast singal or data signal, and the requirement of service quality QoS is higher than data signal by the transmission of broadcast singal; Judge the signal type belonging to service signal; If judging, service signal is broadcast singal, then broadcast singal is loaded into the transfer resource for transmitting broadcast singal, is sent to whole terminal module, receives broadcast singal respectively on the transfer resource for transmit broadcast singal for whole terminal modules. The broadcast that coaxial cable broadband accesses real-time performance low latency and shake is utilized to transmit to carry One-to-All Broadcast business, such that it is able to adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Description

Data transmission method and device

Technical field

The present invention relates to radio and television and broadband data communication technology, particularly relate to a kind of data transmission method and device.

Background technology

Traditional cable TV network, is the broadband integrated net of broadcasting and TV of point-to-multipoint tree network structure, has the downlink broadcast passage in broadband, frequency division multiple access technology is adopted to carry out division signals, for transfer of unidirectional broadcasting service, it is not necessary to congestion control, but two-way interactive is poor. Bi-directional data traffic is then needed utilize bi-directional access network to be transmitted, such as utilize EPON (PassiveOpticalNetwork, PON) in conjunction with coaxial cable Technology of Ethernet Broadband Insertion (EthernetoverCoax, EOC) implementation, namely PON+EOC technology realizes bilateral construction.

The present situation of current cable network is, for One-to-All Broadcast business such as live DTVs, need to adopt based on DVB (DigitalVideoBroadcasting, DVB) radio network is transmitted, by being deployed in the headend of the technology such as the support DVB at corridor or optical node place, community, utilizing the Set Top Box that One-to-All Broadcast business is sent in user family by the coaxial cable distribution net in Lou Neihuo community, after being demodulated, television terminal is arrived in output; For two-way data, voice and video etc. based on Internet protocol (InternetProtocol, IP) data service, need to adopt the headend based on technology such as EOC, utilize the terminal unit that data service is sent in user family by bi-directional access network, and the data that terminal unit returns are sent to headend, thus the bi-directional data traffic realized between headend and terminal unit.

During owing to One-to-All Broadcast business and bi-directional data traffic are transmitted, need to be utilized respectively the two diverse technical systems of class to realize, and be respectively applied between the headend under different technologies system can not be compatible, One-to-All Broadcast business of the prior art and bi-directional data traffic need to be utilized respectively corresponding headend and are transmitted, and the complexity of network is higher.

Summary of the invention

The present invention provides a kind of data transmission method and device, for reducing the complexity of the network supporting One-to-All Broadcast business and bi-directional data traffic transmission simultaneously.

The first aspect of the invention is to provide a kind of data transmission method, including:

Receiving service signal, carry signal type in described service signal, described signal type includes broadcast singal or data signal, and the requirement of service quality QoS is higher than described data signal by the transmission of described broadcast singal;

Judge the signal type belonging to described service signal;

If judging, described service signal is broadcast singal, then described broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, on the described transfer resource for transmit broadcast singal, receives described broadcast singal for described whole terminal modules respectively.

Another aspect of the present invention is to provide a kind of data transmission method, including:

Receive the broadcast singal that sends on the transfer resource for transmit broadcast singal of headend module, described broadcast singal be described headend module after judging that service signal is broadcast singal, described in being loaded on the transfer resource transmitting broadcast singal; Or

Receive the data signal that described headend module sends on the transfer resource for transmit data signal, described data signal be described headend module after judging that service signal is data signal, be loaded into described on the transfer resource transmitting data signal.

An additional aspect of the present invention is to provide a kind of headend module, including:

Receiving unit, be used for receiving service signal, carry signal type in described service signal, described signal type includes broadcast singal or data signal, and the requirement of service quality QoS is higher than described data signal by the transmission of described broadcast singal;

Judging unit, for judging the signal type belonging to described service signal;

Processing unit, for when judging that described service signal is broadcast singal, described broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, on the described transfer resource for transmit broadcast singal, receives described broadcast singal for described whole terminal modules respectively.

An additional aspect of the present invention is to provide a kind of terminal module, including:

Receive unit, for receiving the broadcast singal that headend module sends on the transfer resource for transmit broadcast singal, described broadcast singal be described headend module after judging that service signal is broadcast singal, be loaded into described on the transfer resource transmitting broadcast singal; Or

An additional aspect of the present invention is to provide a kind of headend, including above-mentioned headend module.

An additional aspect of the present invention is to provide a kind of terminal unit, including above-mentioned terminal module.

An additional aspect of the present invention is to provide a kind of communication system, including above-mentioned headend and terminal unit.

Data transmission method provided by the invention and device, after receiving service signal, judge the signal type belonging to this service signal, if judging, this service signal is broadcast singal, then this broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, the broadcast that coaxial cable broadband accesses real-time performance low latency and shake is utilized to transmit to carry One-to-All Broadcast business, such that it is able to adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Data transmission method provided by the invention and device, headend module can be received after judging that service signal is broadcast singal, it is loaded into the broadcast singal of transmission on the transfer resource for transmit broadcast singal or receives headend module after judging that service signal is data signal, be loaded on the transfer resource for transmit data signal send data signal, it is achieved thereby that utilize coaxial cable broadband to access network carrying One-to-All Broadcast business, adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Accompanying drawing explanation

Fig. 1 is the flow chart of data transmission method one embodiment provided by the invention;

Fig. 2 is the flow chart of another embodiment of data transmission method provided by the invention;

Fig. 3 a is the flow chart of the another embodiment of data transmission method provided by the invention;

Fig. 3 b is the flow chart of the another embodiment of data transmission method provided by the invention;

Fig. 4 is the flow chart of the another embodiment of data transmission method provided by the invention;

Fig. 5 is the flow chart of the another embodiment of data transmission method provided by the invention;

Fig. 6 is the structural representation of headend module one embodiment provided by the invention;

Fig. 7 is the structural representation of another embodiment of headend module provided by the invention;

Fig. 8 is the structural representation of terminal module one embodiment provided by the invention;

Fig. 9 is the structural representation of another embodiment of terminal module provided by the invention;

Figure 10 is the structural representation of headend embodiment provided by the invention;

Figure 11 is the structural representation of terminal unit embodiment provided by the invention;

Figure 12 a is the system construction drawing of communication system provided by the invention;

Figure 12 b is the schematic diagram of the logical channel of communication system provided by the invention.

Detailed description of the invention

Bi-directional access network can adopt the broadband access technology based on coaxial cable, i.e. EOC technology, it is achieved bidirectional data communication. Wherein, EOC technology includes high-performance coaxial cable access network network (HighperformanceNetworkOverCoax, HINOC), power line network (HomePlugAV), multimedia over Coax Alliance (MultimediaoverCoaxAlliance, MoCA), HPNA Home Phoneline Networking Alliance (HomePhonelineNetworkingAlliance, HPNA) etc. Although the broadband access based on coaxial cable can be realized by multiple technologies scheme, but common ground is to be required for adopting headend and terminal unit, headend and terminal unit to be connected by coaxial cable distribution net network in bi-directional access network.

Headend is deployed in the optical node place of corridor or community, is connected with optical network unit (OpticalNetworkUnit, ONU); Terminal unit is deployed in user family, provides the user with multiple interfaces, including connecting the radio frequency delivery outlet of TV, can connect the Ethernet interface etc. of computer. Communication connection is realized by coaxial cable distribution net network between headend and terminal unit. It is to say, in the network architecture, headend is connected with one or more terminal units by coaxial cable, is utilized by ONU and is linked to network on optical fiber.

Coaxial cable broadband access technology adopts point-to-multipoint star-like logical topological structure, and each terminal unit connected, for controlling node, is managed by headend, and distributes bandwidth resources for it. Between headend and terminal unit, it is possible to adopt unicast technique to realize point-to-point communication, it would however also be possible to employ multicasting technology realizes the communication of point-to-multipoint.

Current coaxial cable broadband accesses system can support the bi-directional data traffic such as online, Internet Protocol Television, IP phone, what adopt is demand assigned Bandwidth sharing mechanism, it is to say, need the size of occupied bandwidth according to data service, correspondingly for its distribution bandwidth resources. Owing to bi-directional data traffic is in Consumer's Experience, the requirement of real-time being not as high, therefore when transmitting bi-directional data traffic, a range of time delay and shake can be tolerated.

And the One-to-All Broadcast business such as live DTV are higher to the requirement of real-time, coaxial cable broadband accesses the system time delay when transmitting data service and jittering characteristic is difficult to meet the demand of the service quality (QualityofService, QoS) of the One-to-All Broadcast business such as live DTV. Therefore, the cable TV signal of the One-to-All Broadcast business such as live DTV is needed to adopt DVB (DigitalVideoBroadcasting, DVB) technology to be transmitted in other frequency range. DVB technology adopts edge quadrature amplitude modulation (QuadratureAmplitudeModulation, QAM) manipulator is modulated, via the hybrid network (HybridFiber-Coaxial that optical fiber and coaxial cable combine, HFC) carrying, by One-to-All Broadcast business such as live DTVs, transmit the Set Top Box to user family, namely may be output on television terminal after being demodulated.

DVB technology and coaxial cable broadband access technology can share identical physical network, it would however also be possible to employ different physical networks. A kind of conventional mode is, DVB technology and coaxial cable broadband access technology can share the coaxial cable distribution net between headend and each terminal unit.

Due to functionally, existing coaxial cable broadband accesses system can not substitute cable television system completely, therefore, the present invention is directed to the QoS demand of One-to-All Broadcast business, data are forwarded and Bandwidth sharing mechanism carries out specialized designs, a kind of coaxial cable broadband supporting broadcast channel is provided to access system, described broadcast channel can meet broadcasting service QoS demand, wherein, cable television system is the system that above-mentioned cable TV network forms, coaxial cable broadband accesses system and is the system utilizing coaxial cable broadband access technology to realize that above-mentioned bi-directional access network forms.

Broadcast singal described in following inventive embodiments can be the signal of above-mentioned One-to-All Broadcast business; Data signal can be the signal of above-mentioned bi-directional data traffic. The executive agent of Fig. 1, Fig. 2, Fig. 3 a and Fig. 3 b illustrated embodiment is headend module.

Fig. 1 is the flow chart of data transmission method one embodiment provided by the invention, as it is shown in figure 1, the method includes:

Step 101, reception service signal.

Wherein, carrying signal type in described service signal, described signal type includes broadcast singal or data signal, and the requirement of service quality QoS is higher than described data signal by the transmission of described broadcast singal.

Step 102, judge the signal type belonging to described service signal. If judging, described service signal is broadcast singal, then perform step 103.

Headend module receives service signal from ONU, after receiving service signal, it is judged that the type of this service signal. Carrying signal type in this service signal, signal type can include broadcast singal or data signal. It is to say, this service signal can be broadcast singal, it is also possible to for data signal.

Owing to prior art being supported, the headend module of coaxial cable broadband access technology can not meet the QoS demand of One-to-All Broadcast business, therefore only it is used for receiving and processing data signal; And the headend module in various embodiments of the present invention is no longer influenced by the restriction of service signal type, for broadcast singal and data signal, all can receive and process accordingly.

Broadcast singal can be the signal of the One-to-All Broadcast business such as live DTV, and QoS demand during to transmission signal is higher than common data signal. The headend module implementation when broadcast singal is transmitted is different from implementation when data signal is transmitted. Therefore, the type of service signal is judged, be in order to the signal for unlike signal type adopts corresponding transmission means.

When judging that service signal is broadcast singal, it is possible to use the operating procedure described in step 103, this broadcast singal is transmitted; Owing to supporting that the headend module of coaxial cable broadband access technology is mainly used in transmission data signal at present, therefore when judging that service signal is data signal, it is possible to adopt the implementation similar with prior art that this data signal is transmitted.

Step 103, described broadcast singal is loaded into the transfer resource for transmitting broadcast singal, is sent to whole terminal module.

Performing step 103 is to receive described broadcast singal respectively on the described transfer resource for transmit broadcast singal for described whole terminal modules.

Broadcast singal, after judging that service signal is broadcast singal, is loaded on the transfer resource aiming at transmission broadcast singal and distribute by headend module.

It is one or more transfer resources that headend module divides specifically for transmission broadcast singal for transmitting the transfer resource of broadcast singal. The difference of the multiplex mode of the coaxial cable broadband access technology adopted according to headend module, namely transfer resource is correspondingly the resource in this multiplex mode. Such as, headend module adopts frequency division multiple access (FrequencyDivisionMultipleAccess, FDMA) technology, and corresponding transfer resource is different frequency; Headend module adopts time division multiple acess (TimeDivisionMultipleAccess, TDMA) technology, and corresponding transfer resource is different time slot.

Headend module is the transfer resource that transmission broadcast singal marks off, and will not be used to transmit other service signals again, thereby it is ensured that meet the demand of the QoS of transmission broadcast singal.

Owing to the feature of broadcast singal is, it is necessary to be sent to whole terminal module. Therefore, headend module, after judging that service signal is broadcast singal, does not transmit broadcast singal merely with special transfer resource, and this broadcast singal is also sent to whole each terminal module.

Headend module transfer resource is divided into be exclusively used in transmission broadcast singal or be exclusively used in transmission data signal after, the transfer resource divided is informed each terminal module with the form of notification message. Thus, each terminal module, before receiving the service signal that headend module sends, is namely known the type of the signal transmitted on each transfer resource, and then is received broadcast singal or data signal at correspondingly transfer resource.

When prior art utilizing cable TV network carry out transfer of unidirectional broadcasting service, it is necessary to divide certain frequency and bandwidth resources specially for cable TV network, for transfer of unidirectional broadcasting service; And the embodiment of the present invention need not adopt wired TV network transmission One-to-All Broadcast business specially, access in network at coaxial cable broadband and can complete the transmission to One-to-All Broadcast business and bi-directional data traffic, when realizing One-to-All Broadcast business and bi-directional data traffic are transmitted under same transmission system, compared with realizing respectively under the transmission system different with at two kinds One-to-All Broadcast business and bi-directional data traffic are transmitted, save certain bandwidth resources, improve the utilization rate of bandwidth resources.

The data transmission method that the embodiment of the present invention provides, after receiving service signal, judge the signal type belonging to this service signal, if judging, this service signal is broadcast singal, then this broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, the broadcast that coaxial cable broadband accesses real-time performance low latency and shake is utilized to transmit to carry One-to-All Broadcast business, such that it is able to adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Fig. 2 is the flow chart of another embodiment of data transmission method provided by the invention, as in figure 2 it is shown, on the basis of above-described embodiment, after execution of step 102, described service signal is data signal if judging, then performs step 104 and step 105.

Step 104, obtain the destination address carried in described data signal.

Step 105, described data signal is loaded into the transfer resource for transmitting data signal, is sent to the target terminal module that described destination address is corresponding.

Perform step 105 be in order to, on the described transfer resource for transmit data signal, receive described data signal for described target terminal module.

Headend module is when judging that service signal is data signal, specific embodiment can be, its entrained one or more destination addresses needing to send are obtained from this data signal, before this data signal is sent respectively to the target terminal module that each destination address is corresponding respectively, this data signal is loaded on the transfer resource being specifically designed to transmission data signal.

Headend module can transfer resource in, fractional transmission resource is being divided into specially for transmitting beyond broadcast singal, all the other transfer resources are used for transmitting data signal. Owing to headend module is when for data service allocation of transmission resources, it is possible to the size according to the data volume of data signal, dynamically for this data signal distribution transfer resource on the transfer resource for transmit data signal.

Thus, headend module utilizes the transfer resource for transmitting data signal, data signal is sent to the target terminal module that destination address is corresponding, and then target terminal module can receive this data signal on correspondingly transfer resource.

The data transmission method that the embodiment of the present invention provides, after judging that service signal is data signal, obtain the destination address carried in this data signal, and this data signal is loaded into the transfer resource for transmitting data signal, it is sent to the target terminal module that destination address is corresponding, thus realize utilizing unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Fig. 3 a is the flow chart of the another embodiment of data transmission method provided by the invention, as shown in Figure 3 a, on the basis of the various embodiments described above, perform step 102 and judge that described service signal is after broadcast singal, before described broadcast singal is sent to whole terminal module by execution step 103, the method can also include step 106.

Step 106, generate the first transfer resource allocation rule, and described first transfer resource allocation rule is broadcast to whole terminal module.

Wherein, described first transfer resource allocation rule includes rule that the transfer resource for transmitting broadcast singal is allocated. Performing step 106 is to receive corresponding broadcast singal for each terminal module according to described first transfer resource allocation rule.

Fig. 3 b is the flow chart of the another embodiment of data transmission method provided by the invention, as shown in Figure 3 b, on the basis of the various embodiments described above, perform step 102 and judge that described service signal is after data signal, performing step 105 described data signal to be sent to before described target terminal module, the method can also include step 107.

Step 107, generate the second transfer resource allocation rule, and described second transfer resource allocation rule is sent to described target terminal module.

Wherein, described second transfer resource allocation rule is the rule that transfer resource is allocated by the data volume according to data signal to be sent. Performing step 107 is to receive corresponding data signal for described target terminal module according to described second transfer resource allocation rule.

During owing to performing step 105 and step 107, the destination address of target terminal module obtains by performing step 104, and therefore, concrete, the operation of step 107 can carry out after execution of step 104, not shown in Fig. 3 b.

Headend module is after receiving service signal, need the signal type according to service signal that transfer resource is divided, transfer resource is divided into the transfer resource being specifically designed to downlink transfer broadcast singal, is specifically designed to the transfer resource of downlink transmission data signal and is specifically designed to the transfer resource of uplink transmission data signal. Wherein, the descending transmission direction being sent signal by headend module to terminal module that refers to, the up transmission direction referring to that terminal module head-end module sends signal.

Headend module is when the transfer resource for the data signal distribution of downlink transfer, can be allocated according to the size of the data volume of descending data signal to be sent, consider the number of available transmission resources simultaneously, corresponding allocation strategy is adopted to be allocated, therefore headend module is after receiving service signal and judging that service signal is data signal, correspondingly generates the size of the transfer resource needing distribution according to the size of the data volume of data signal to be sent.

Headend module is not only downlink transmission data signal allocation of transmission resources, also for terminal module distribution for uplink transmission data signal allocation of transmission resources. Before terminal module head-end module sends upstream data. signals, first head-end module can send reservation signal, reservation signal is to send, in terminal module head-end module, the solicited message sent before upstream data. signals, carries it by the size of the data volume of transmission in uplink in reservation signal. The headend module information according to the sign data volume size carried in reservation signal, and consider the number of currently available transfer resource, adopting corresponding allocation strategy is uplink allocation of transmission resources.

Rule for broadcast singal allocation of transmission resources is defined as the first transfer resource allocation rule, the rule for data signal distribution transfer resource is defined as the second transfer resource allocation rule. Wherein, the second transfer resource allocation rule includes the rule of the data signal distribution transfer resource for downlink transfer and the rule of the data signal distribution transfer resource for uplink.

After generate the first transfer resource allocation rule according to broadcast singal, the first transfer resource allocation rule is broadcast to whole each terminal module. After generate the second transfer resource allocation rule according to data signal, the second transfer resource allocation rule is sent to target terminal module.

Thus, each terminal module can before the broadcast singal receiving headend module transmission or data signal, knowing that what transmit on which transfer resource is broadcast singal, what which transfer resource transmitted is data signal, and which transfer resource can be used for sending upstream data. signals. Each terminal module after receiving broadcast singal or data signal from corresponding transfer resource, it is possible to adopts the implementation similar with prior art, the difference according to signal type, processes operation accordingly.

The data transmission method that the embodiment of the present invention provides, after receiving service signal, if judging, service signal is broadcast singal, then before broadcast singal is sent to each terminal module, the first transfer resource allocation rule for broadcast singal allocation of transmission resources is broadcast to whole terminal module, if judging, service signal is data signal, then before data signal is sent to target terminal module, the second transfer resource allocation rule for downlink transmission data signal and uplink transmission data signal allocation of transmission resources is sent to target terminal module, so that each terminal module receives corresponding broadcast singal or data signal according to transfer resource allocation rule, or send data signal up accordingly according to transfer resource allocation rule, be conducive to each terminal module when knowing the signal type transmitted on each transfer resource in advance, receive corresponding broadcast or data signal, or send corresponding upstream data. signals, thus facilitate views with unified technical scheme and the network architecture carries One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

Further, on the basis of the various embodiments described above, the method can also include, periodically according to broadcast singal to be sent and/or data signal in the upper cycle, generate overall transfer resource allocation rule, and described overall transfer resource allocation rule is broadcast to described whole terminal module; Wherein, described overall transfer resource allocation rule includes described first transfer resource allocation rule and described second transfer resource allocation rule.

Headend module when initial allocation transfer resource, be receive service signal or receive terminal module transmission reservation signal after carry out, hereafter, the distribution of transfer resource can periodically be carried out. The size in this cycle can be configured as required.

Service signal is the descending signal to send of headend module, reservation signal is that terminal module head-end module before sending upstream data. signals sends, therefore, headend module be transmitted resource distribution carry out after receiving service signal or reservation signal.

If what headend module first received is service signal, then the type of service of service signal is judged, if service signal is broadcast singal, the transfer resource of transmission broadcast singal then it is exclusively used in for the distribution of this broadcast singal, if service signal is data signal, then according to the data volume size of data signal and available transmission resources number, be exclusively used in the transfer resource of transmission data signal for downlink data signal distribution. Hereafter, headend module periodically redistributes transfer resource, when end cycle, it is judged that whether had packet to be sent in the upper cycle, if having, then the type of service according to packet to be sent, is correspondingly its allocation of transmission resources. And judge whether to have in the upper cycle and receive and untreated reservation signal from terminal module, if having, then how many according to the size of the data volume of the data signal up to be sent characterized in reservation signal and available transmission resources, for upstream data. signals allocation of transmission resources.

If what headend module first received is reservation signal, then how many according to the size of the data volume of the data signal up to be sent characterized in reservation signal and available transmission resources, for upstream data. signals allocation of transmission resources. Hereafter headend module periodically redistributes transfer resource, when end cycle, it is judged that whether had packet to be sent in the upper cycle or receives and untreated reservation signal from terminal module.

Packet to be sent is the packet being not yet loaded on transfer resource, it is loaded into the packet on transfer resource namely to be sent after loading is complete, therefore headend module may determine that the packet not yet sent in the cycle, packet namely to be sent. Wherein, packet to be sent is likely to belong to the packet not yet sent in current business signal, it is also possible to belong to the packet being newly received.

If having packet to be sent or untreated reservation signal, then headend module is according to packet to be sent or untreated reservation signal, re-starts up and/or downlink transfer resource distribution. For the packet of the broadcast singal in packet to be sent, distribution is exclusively used in the transfer resource of transmission broadcast singal, corresponding to the first transfer resource allocation rule in above-described embodiment; Packet for data signal therein, the size of the data volume according to downlink data signal and the number of available transmission resources, distribute correspondingly sized downlink transfer resource, for untreated reservation signal, the size of the data volume according to upstream data. signals waiting for transmission and the number of available transmission resources, distributing correspondingly sized uplink transmission resource, the allocation rule of downlink transfer resource and uplink transmission resource is corresponding to the second transfer resource allocation rule in above-described embodiment.

If without packet to be sent, then headend module need not re-start the distribution of downlink transfer resource. If without untreated reservation signal, then headend module need not re-start the distribution of uplink transmission resource.

Owing to transfer resource has globality, it is possible to unify to be overall transfer resource allocation rule by the first transfer resource allocation rule and the second transfer resource allocation rule, and overall transfer resource allocation rule is broadcast to whole terminal modules. And then each terminal module is according to the up-to-date overall transfer resource allocation rule received, corresponding transfer resource receives service signal or head-end module sends upstream data. signals.

The data transmission method that the embodiment of the present invention provides, periodically overall transfer resource allocation rule is updated, it is easy to each terminal module and receives corresponding broadcast singal or data signal according to transfer resource allocation rule, or head-end module sends upstream data. signals, be conducive to each terminal module when knowing the signal type transmitted on each transfer resource in advance, receive corresponding broadcast or data signal, or transmission upstream data. signals, thus facilitate views with unified technical scheme and the network architecture carries One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

Further, on the basis of the various embodiments described above, in step 103, described broadcast singal is loaded on the transfer resource for transmit broadcast singal particularly as follows:

The destination address of described broadcast singal is set to broadcast address, and described broadcast address is used for indicating using described whole terminal modules as target terminal module; The broadcast singal being provided with described broadcast address is loaded into the transfer resource for transmitting broadcast singal.

Headend module is after judging that service signal is broadcast singal, before being loaded on the transfer resource for transmit broadcast singal by this broadcast singal, it is also possible to the form of the Frame of this broadcast singal is packaged. Concrete, the destination address of the Frame of this broadcast singal is set to broadcast address, the special identification information that broadcast address can define in communication protocol, headend module is when sending broadcast singal, according to the special identification information in destination address, namely would know that this broadcast message needs to be sent to whole terminal modules. It is to say, the effect of broadcast address is to show that whole terminal modules is target terminal module.

The broadcast singal being provided with broadcast address, after having carried out the destination address of broadcast singal arranging, is loaded into the transfer resource for transmitting broadcast singal by headend module.

The data transmission method that the embodiment of the present invention provides, before being loaded on the transfer resource for transmit broadcast singal by broadcast singal to be transmitted, the destination address of this broadcast singal is configured, after destination address is set to broadcast address, namely can be shown that this broadcast singal needs to be sent to whole terminal module, be conducive to utilizing coaxial cable broadband to access network carrying One-to-All Broadcast business, thus facilitate views with unified technical scheme and the network architecture carries One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

Further, on the basis of the various embodiments described above, described transfer resource is time slot;

Correspondingly, the described transfer resource for transmitting broadcast singal is the time slot for transmitting broadcast singal, the described transfer resource for transmitting data signal is the time slot for transmitting data signal, and the slot time between length and the described time slot for transmitting broadcast singal of the described time slot for transmitting broadcast singal can preset.

One is preferred embodiment, and the communication between headend module and terminal module adopts TDMA technology, and transfer resource is one or more time slot. Correspondingly, for transmitting the time slot that the transfer resource of broadcast singal is exactly headend module and marks off for transmission broadcast singal in advance, for transmitting the time slot that the transfer resource of data signal is exactly headend module and marks off for transmission data signal in advance.

Wherein, in order to meet the demand of QoS when broadcast singal is transmitted, time slot for transmitting broadcast singal is set to be fixed for transmission broadcast singal, length for transmitting the time slot of broadcast singal can be set previously according to needs, it addition, in order to, after ensureing that terminal module receives broadcast message, present to continuity during user, slot time for transmitting between the time slot of broadcast singal is also critically important, it is also possible to be set previously according to needs.

Owing to headend module can according to the size of the data volume of data signal, determine need use time slot number, therefore, the time slot for transmitting data signal can be used according to the actual needs by headend module, without being fixedly installed slot length and slot time. In all available time slots of headend, except dividing the time slot being used for transmitting broadcast singal out, all the other time slots may be incorporated for transmission data signal.

Additionally, headend can change the division to time slot, after have updated transfer resource allocation rule, the transfer resource allocation rule after updating is broadcast to each terminal module. Thus each terminal module can receive corresponding broadcast singal or data signal according to the transfer resource allocation rule updated.

The data transmission method that the embodiment of the present invention provides, adopt time slot as transfer resource, the time slot transmitting broadcast singal will be used for as the transfer resource being used for transmitting broadcast singal, the time slot transmitting data signal will be used for as the transfer resource being used for transmitting data signal, and for being used for transmitting the length of the time slot of broadcast singal and can being preset for transmitting the slot time between the time slot of broadcast singal, advantageously ensure that the transmission quality to broadcast singal, thus utilizing the broadcast that coaxial cable broadband accesses real-time performance low latency and shake to transmit to carry One-to-All Broadcast business, adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

Fig. 4 is terminal module to the executive agent of embodiment illustrated in fig. 5.

Fig. 4 is the flow chart of the another embodiment of data transmission method provided by the invention, and as shown in Figure 4, the method includes:

The broadcast singal that step 201, reception headend module send on the transfer resource for transmit broadcast singal, or receive the data signal that described headend module sends on the transfer resource for transmit data signal.

Wherein, described broadcast singal be described headend module after judging that service signal is broadcast singal, be loaded into described on the transfer resource transmitting broadcast singal; Described data signal be described headend module after judging that service signal is data signal, be loaded into described on the transfer resource transmitting data signal.

The method carried out data transmission between terminal module and headend module in the embodiment of the present invention, it is possible to referring to the implementation in above-mentioned steps 101-105 and relevant each embodiment, herein repeat no more.

The data transmission method that the embodiment of the present invention provides, headend module can be received after judging that service signal is broadcast singal, it is loaded into the broadcast singal of transmission on the transfer resource for transmit broadcast singal or receives headend module after judging that service signal is data signal, be loaded on the transfer resource for transmit data signal send data signal, it is achieved thereby that utilize coaxial cable broadband to access network carrying One-to-All Broadcast business, adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Fig. 5 is the flow chart of the another embodiment of data transmission method provided by the invention, as it is shown in figure 5, before performing step 201, the method can also include:

Step 200, the first transfer resource allocation rule receiving the transmission of described headend module or the second transfer resource allocation rule.

Wherein, described first transfer resource allocation rule includes the rule that the transfer resource for transmitting broadcast singal is allocated by described headend module, and described second transfer resource allocation rule is the rule that transfer resource is allocated by described headend module according to the data volume of data signal to be sent.

Or, receiving the overall transfer resource allocation rule of described headend module broadcast, described overall transfer resource allocation rule includes described first transfer resource allocation rule and described second transfer resource allocation rule.

The method carried out data transmission between terminal module and headend module in the embodiment of the present invention, it is possible to referring to the implementation in above-mentioned steps 101-107 and relevant each embodiment, herein repeat no more.

The data transmission method that the embodiment of the present invention provides, before the broadcast singal receiving headend module transmission or data signal, receive the transfer resource allocation rule that headend module sends, thus according in transfer resource allocation rule to being used for the rule of transmitting the transfer resource of broadcast singal and the transfer resource for transmitting data signal divides, corresponding transfer resource receives broadcast singal or data signal, thus each terminal module is when knowing the signal type transmitted on each transfer resource in advance, receive corresponding broadcast or data signal, facilitate views with unified technical scheme and the network architecture carries One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

Fig. 6 is the structural representation of headend module one embodiment provided by the invention, and as shown in Figure 6, this headend module includes receiving unit 11, judging unit 12 and processing unit 13.

Wherein, receiving unit 11, be used for receiving service signal, carry signal type in described service signal, described signal type includes broadcast singal or data signal, and the requirement of service quality QoS is higher than described data signal by the transmission of described broadcast singal;

Judging unit 12, for judging the signal type belonging to described service signal;

Processing unit 13, for when judging that described service signal is broadcast singal, described broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, on the described transfer resource for transmit broadcast singal, receives described broadcast singal for described whole terminal modules respectively.

The headend module that the embodiment of the present invention provides, after receiving service signal, judge the signal type belonging to this service signal, if judging, this service signal is broadcast singal, then this broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, the broadcast that coaxial cable broadband accesses real-time performance low latency and shake is utilized to transmit to carry One-to-All Broadcast business, such that it is able to adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Further, on the basis of above-described embodiment, described processing unit 13 is additionally operable to:

When judging that described service signal is data signal, obtain the destination address carried in described data signal, and described data signal is loaded into the transfer resource for transmitting data signal, it is sent to the target terminal module that described destination address is corresponding, on the described transfer resource for transmit data signal, receives described data signal for described target terminal module.

The headend module that the embodiment of the present invention provides, after judging that service signal is data signal, obtain the destination address carried in this data signal, and this data signal is loaded into the transfer resource for transmitting data signal, it is sent to the target terminal module that destination address is corresponding, thus realize utilizing unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Fig. 7 is the structural representation of another embodiment of headend module provided by the invention, as it is shown in fig. 7, on the basis of above-described embodiment, described headend module also includes:

Scheduling unit 14, after judging that described service signal is broadcast singal at described judging unit 12, before described broadcast singal is sent to whole terminal module by described processing unit 13, generate the first transfer resource allocation rule, and described first transfer resource allocation rule is broadcast to described whole terminal module, described first transfer resource allocation rule includes the rule that the transfer resource for transmitting broadcast singal is allocated, and receives corresponding broadcast singal for each terminal module according to described first transfer resource allocation rule;

Or, after judging that described service signal is data signal at described judging unit 12, described data signal is sent to before described target terminal module by described processing unit 13, generate the second transfer resource allocation rule, and described second transfer resource allocation rule is sent to described target terminal module, described second transfer resource allocation rule is the rule that transfer resource is allocated by the data volume of the data signal to be sent according to module, receives corresponding data signal for described target terminal module according to described second transfer resource allocation rule.

Further, on the basis of the various embodiments described above, described scheduling unit 14 can be also used for:

Periodically according to broadcast singal to be sent and/or data signal in the upper cycle, generated overall transfer resource allocation rule, and described overall transfer resource allocation rule is broadcast to described whole terminal module;

Wherein, described overall transfer resource allocation rule includes described first transfer resource allocation rule and described second transfer resource allocation rule.

Headend module, when for terminal module allocation of transmission resources, is not only the terminal module distribution transfer resource for downlink transfer, also carries out the transfer resource of uplink for terminal module distribution for terminal module.

Terminal module is after receiving the transfer resource allocation rule that headend module sends, both broadcast singal or data signal that headend module sends can have been received, head-end module can also send corresponding data signal, or head-end module returns corresponding signaling information. Headend module can arrange corresponding module for receiving terminal module transmitted information.

Concrete, the signalling interactive process of terminal module head-end module return signal or the processing procedure of transmission data signal can adopt the implementation similar with prior art, repeat no more herein.

Further, on the basis of the various embodiments described above, described processing unit 13 is additionally operable to:

The destination address of described broadcast singal is set to broadcast address, described broadcast address is used for indicating described whole terminal modules as target terminal module, and the broadcast singal being provided with described broadcast address is loaded into the transfer resource for transmitting broadcast singal.

The headend module that the embodiment of the present invention provides, before being loaded on the transfer resource for transmit broadcast singal by broadcast singal to be transmitted, the destination address of this broadcast singal is configured, after destination address is set to broadcast address, namely can be shown that this broadcast singal needs to be sent to whole terminal module, be conducive to utilizing coaxial cable broadband to access network carrying One-to-All Broadcast business, thus facilitate views with unified technical scheme and the network architecture carries One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

The headend module that the embodiment of the present invention provides, adopt time slot as transfer resource, the time slot transmitting broadcast singal will be used for as the transfer resource being used for transmitting broadcast singal, the time slot transmitting data signal will be used for as the transfer resource being used for transmitting data signal, and for being used for transmitting the length of the time slot of broadcast singal and can being preset for transmitting the slot time between the time slot of broadcast singal, advantageously ensure that the transmission quality to broadcast singal, thus utilizing the broadcast that coaxial cable broadband accesses real-time performance low latency and shake to transmit to carry One-to-All Broadcast business, adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

Concrete, that in various embodiments of the present invention, headend module carries out data transmission method, it is possible to referring to the operating procedure described in the embodiment of the method for above-mentioned correspondence, herein repeat no more.

Fig. 8 is the structural representation of terminal module one embodiment provided by the invention, and as shown in Figure 8, this terminal module includes:

Receive unit 21, for receiving the broadcast singal that headend module sends on the transfer resource for transmit broadcast singal, described broadcast singal be described headend module after judging that service signal is broadcast singal, be loaded into described on the transfer resource transmitting broadcast singal; Or

Wherein, terminal module is after receiving the transfer resource allocation rule that headend module sends, both can receive broadcast singal or data signal that headend module sends, it is also possible to head-end module sends corresponding data signal, or head-end module had returned corresponding signaling information. Headend module can arrange corresponding module for receiving terminal module transmitted information.

The terminal module that the embodiment of the present invention provides, headend module can be received after judging that service signal is broadcast singal, it is loaded into the broadcast singal of transmission on the transfer resource for transmit broadcast singal or receives headend module after judging that service signal is data signal, be loaded on the transfer resource for transmit data signal send data signal, it is achieved thereby that utilize coaxial cable broadband to access network carrying One-to-All Broadcast business, adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network, improve the utilization rate of bandwidth resources, be conducive to the technical need of integration of three networks business.

Fig. 9 is the structural representation of another embodiment of terminal module provided by the invention, as it is shown in figure 9, described terminal module can also include:

Control unit 22, for receiving, at described reception unit 21, the broadcast singal that described headend module sends on the transfer resource for transmit broadcast singal, or before receiving the data signal that described headend module sends on the transfer resource for transmit data signal, receive the first transfer resource allocation rule or the second transfer resource allocation rule that described headend module sends, described first transfer resource allocation rule includes the rule that the transfer resource for transmitting broadcast singal is allocated by described headend module, described second transfer resource allocation rule is the rule that transfer resource is allocated by the data volume according to data signal to be sent,

Or receiving the overall transfer resource allocation rule of described headend module broadcast, described overall transfer resource allocation rule includes described first transfer resource allocation rule and described second transfer resource allocation rule.

Headend module, when for terminal module allocation of transmission resources, is not only the terminal module distribution transfer resource for downlink transfer, and also distribution carries out the transfer resource of uplink for terminal module. Thus terminal module can according to the transfer resource for uplink that headend module is its distribution, head-end equipment sending data signal or return signaling information.

The terminal module that the embodiment of the present invention provides, before the broadcast singal receiving headend module transmission or data signal, receive the transfer resource allocation rule that headend module sends, thus according in transfer resource allocation rule to being used for the rule of transmitting the transfer resource of broadcast singal and the transfer resource for transmitting data signal divides, corresponding transfer resource receives broadcast singal or data signal, thus each terminal module is when knowing the signal type transmitted on each transfer resource in advance, receive corresponding broadcast or data signal, facilitate views with unified technical scheme and the network architecture carries One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

The terminal module that the embodiment of the present invention provides, adopt time slot as transfer resource, the time slot transmitting broadcast singal will be used for as the transfer resource being used for transmitting broadcast singal, the time slot transmitting data signal will be used for as the transfer resource being used for transmitting data signal, and for being used for transmitting the length of the time slot of broadcast singal and can being preset for transmitting the slot time between the time slot of broadcast singal, advantageously ensure that the transmission quality to broadcast singal, thus utilizing the broadcast that coaxial cable broadband accesses real-time performance low latency and shake to transmit to carry One-to-All Broadcast business, adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, simplify network structure, reduce the complexity of network.

Concrete, that in various embodiments of the present invention, terminal module carries out data transmission method, it is possible to referring to the operating procedure described in the embodiment of the method for above-mentioned correspondence, herein repeat no more.

Figure 10 is the structural representation of headend embodiment provided by the invention, and as shown in Figure 10, this headend 3 includes arbitrary described headend module 1 in the various embodiments described above.

Wherein headend module 1 can be arranged in independent headend 3, it is also possible to is arranged in ONU equipment. It is to say, headend 3 can be independent device or equipment or be ONU equipment.

Concrete, that in various embodiments of the present invention, headend carries out data transmission method, it is possible to referring to the operating procedure described in the embodiment of the method for above-mentioned correspondence, herein repeat no more.

Figure 11 is the structural representation of terminal unit embodiment provided by the invention, and as shown in figure 11, this terminal unit 4 includes arbitrary described terminal module 2 in the various embodiments described above.

Wherein terminal module 2 can be arranged in independent terminal unit 4, it is also possible to is arranged in Set Top Box. It is to say, terminal unit 4 can be independent device or equipment or be Set Top Box.

Concrete, that in various embodiments of the present invention, terminal unit carries out data transmission method, it is possible to referring to the operating procedure described in the embodiment of the method for above-mentioned correspondence, herein repeat no more.

Figure 12 a is the system construction drawing of communication system provided by the invention, and Figure 12 b is the schematic diagram of the logical channel of communication system provided by the invention. It it is below a kind of optional embodiment of communication system.

Existing coaxial cable broadband is accessed system and has carried out extension upgrading by this communication system, to support the transmission to One-to-All Broadcast business and bi-directional data traffic. As figure 12 a shows, this communication system includes headend 3 and one or more terminal unit 4. Connected by coaxial cable distribution net between headend 3 and terminal unit 4.

Headend 3 is used for receiving Ethernet data bag, after the packet received carries out the process of necessity, is packaged into respective inner protocol format, and is transmitted to terminal unit 4. Data interaction is realized by internal communication protocol between headend 3 and terminal unit 4.

Terminal unit 4 is as the end equipment of communication system, it is achieved intra-network communication agreement and the conversion of Ethernet protocol and radio and television agreement, provides the interface carrying out broadband access for subscriber equipment.

One headend 3 can be connected with multiple stage terminal unit 4, and whole communication system is point-to-multipoint star-like logical topological structure. Headend 3 is as the center control nodes of this communication system, it is achieved unified management and the scheduling to all terminal units 4.

The data transfer direction of headend 3 to terminal unit 4 is descending; The data transfer direction of terminal unit 4 to headend 3 is up. This communication system can adopt multi-carrier modulation, it is possible to adopts time division duplex (TimeDivisionDuplexing, TDD) or FDD (FrequencyDivisionDuplexing, FDD) mode, adopts time division multiple acess TDMA technology.

As shown in Figure 12b, logically there are two data passages between headend 3 and terminal unit 4, respectively broadcast channel and exchange channels.

Wherein, broadcast channel is unidirectional downlink broadcast data channel, as the designated lane of the One-to-All Broadcast business such as carrying live television service; Exchange channels is bidirectional unicast/multicast packet passage, as the designated lane of carrying bi-directional data traffic. Broadcast channel and exchange channels can adopt identical technical system. Broadcast channel and exchange channels are the divisions logically communication link carried out, both substantially realize in same physical connection, therefore, broadcast channel and exchange channels substantially common transmitter and receiver, and adopt identical physical layer parameter and signal processing mechanism.

Exchange channels is for carrying the business that delay requirement is less high such as bi-directional data traffic. Adopt the demand assigned resource allocation mechanism based on reservation/license or equivalence, it is provided that the service done one's best, meet the business need of different priorities. Broadcast channel, for carrying the business that delay requirement is higher such as One-to-All Broadcast business such as live telecast, adopts broadcast mode to realize unidirectional downlink communication. Broadcast channel has the advantage identical with cable television system, namely propagation delay time shake little, without congested.

Broadcast channel and exchange channels are using the time as the parameter of division signals, respectively through different time period transmission signals. Broadcast channel is carried out channel distribution, to ensure the transmission of One-to-All Broadcast business logically can be monopolized a communication port, from time domain angle, the mode allocating time slot in advance can be adopted, it can also be One-to-All Broadcast business setting high priority, adopt the mode being preferably its distribution time slot, or other similar implementations can also be adopted.

Broadcast channel is the logical channel set up on medium access control layer. Specifically, the medium access control layer of coaxial cable broadband access system realizes the functions such as Media access contorl, channel distribution and service adaptation. In order to realize the support to broadcast channel, need channel distribution and service adaptation part are carried out upgrading extension, so that descending One-to-All Broadcast business and two-way interactive data service are transmitted into terminal unit 4 by physical layer modulation and radio frequency unit respectively in corresponding channel time slot.

The upgrading extension that service adaptation part is carried out, mainly in Frame carrying and address mapping. Data frame format is defined as the Frame for carrying One-to-All Broadcast business, the field of the sign destination address of this Frame is set to broadcast address, the field characterizing carrying type of service is set to broadcast television service, the carry-on frame length of payload segment at Frame, it is possible to be correspondingly configured according to channel situation and portfolio.

Channel allocation unit being divided the upgrading extension carried out, is mainly and bandwidth resources are divided into two parts, a part is used for carrying One-to-All Broadcast business, and another part is used for carrying the clean culture bi-directional data traffic such as data, voice, video.

A kind of preferred implementation is, when the bandwidth resources adopted are time slot, the time span sending window for carrying each time slot of One-to-All Broadcast business is equal, send window to be uniformly distributed on a timeline, this time span can be set in advance, it is also conceivable to the One-to-All Broadcast business demand to bandwidth when arranging; For carrying the time slot of bi-directional data traffic, it is possible to be allocated according to certain strategy according to the bandwidth request of terminal unit 4 by headend 3, the number of the bandwidth resources that each terminal unit 4 is got is variable.

The implementing and can be of channel distribution, when adopting TDD duplex mode, TDMA multi-access mode, headend 3 arranges the channel assignment scheme in each cycle, and by corresponding control frame, channel assignment scheme broadcasts to each terminal unit 4. Each cycle is divided into different time slots, including upstream transmission time slot, downlink transfer time slot and time slot. The length in each cycle is substantially stationary, and the time slot length in each cycle can also be fixing, and the start/stop time of the time slot position in planning horizon is relatively-stationary. Uplink and downlink transmission time slot according to actual needs, can distribute to each terminal unit 4 according to certain strategy. When adopting FDD duplex mode, TDMA multi-access mode, between upstream transmission time slot and downlink transfer time slot, adopt frequency division multiplexing, between downlink transfer time slot and time slot, adopt time division multiplex. Headend 3 is provided with in broadcast channel and exchange channels after the multiplex mode of downlink data channel, informs each terminal unit 4. When no matter utilizing which kind of duplex mode, the length of time slot all can be by network management system and configures directly or indirectly, and wherein network management system can be preset in long-range Network Management Equipment, it is also possible to is arranged in headend 3.

The communication system that the embodiment of the present invention provides, coaxial cable broadband access technology is adopted to realize the fusion of cable TV network and bidirectional data network, existing coaxial cable access technology is improved upgrading, the broadcast channel for One-to-All Broadcast business specialized designs, there is low latency, the transmission characteristic of low jitter, and can according to business demand configured bandwidth, to meet the qos requirement of broadcast television service, such that it is able to adopt unified technical scheme and the network architecture to carry One-to-All Broadcast business and bi-directional data traffic simultaneously, cable TV network and bidirectional data network is made to unite two into one, be conducive to meeting the technical need of integration of three networks business, simplify network structure further, achieve the flexible dispatching to network bandwidth resources and Appropriate application, broadcast channel and exchange channels all adopt the physical layer signal treatment mechanism of existing coaxial cable access technology, adopt the signal processing technology of multicarrier, improve the utilization rate to channel width, also can carry out Design of Compatibility with existing terminal.

One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can be completed by the hardware that programmed instruction is relevant. Aforesaid program can be stored in a computer read/write memory medium. This program upon execution, performs to include the step of above-mentioned each embodiment of the method; And aforesaid storage medium includes: the various media that can store program code such as ROM, RAM, magnetic disc or CDs.

Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit; Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims

1. a data transmission method, it is characterised in that including:

Judge the signal type belonging to described service signal;

If judging, described service signal is broadcast singal, then described broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, on the described transfer resource for transmit broadcast singal, described broadcast singal is received respectively for described whole terminal modules, wherein, the destination address of described broadcast singal is set to broadcast address, and described broadcast address is used for indicating using described whole terminal modules as target terminal module; The broadcast singal being provided with described broadcast address is loaded into the transfer resource for transmitting broadcast singal;

Described judge that described service signal is after broadcast singal, before described broadcast singal is sent to whole terminal module, also include: generate the first transfer resource allocation rule, and described first transfer resource allocation rule is broadcast to described whole terminal module, described first transfer resource allocation rule includes the rule that the transfer resource for transmitting broadcast singal is allocated, and receives corresponding broadcast singal for each terminal module according to described first transfer resource allocation rule;

Or, if judging, described service signal is data signal, then obtain the destination address carried in described data signal;

Described data signal is loaded into the transfer resource for transmitting data signal, is sent to the target terminal module that described destination address is corresponding, on the described transfer resource for transmit data signal, receive described data signal for described target terminal module;

Described judge that described service signal is after data signal, described data signal is sent to before described target terminal module, also include: generate the second transfer resource allocation rule, and described second transfer resource allocation rule is sent to described target terminal module, described second transfer resource allocation rule is the rule that transfer resource is allocated by the data volume according to data signal to be sent, receives corresponding data signal for described target terminal module according to described second transfer resource allocation rule.

2. data transmission method according to claim 1, it is characterised in that described method also includes:

3. data transmission method according to claim 1 and 2, it is characterised in that described transfer resource is time slot;

4. a data transmission method, it is characterised in that including:

Receive the broadcast singal that headend module sends on the transfer resource for transmit broadcast singal, described broadcast singal is that described headend module is after judging that service signal is broadcast singal, it is loaded into described on the transfer resource transmitting broadcast singal, wherein, the destination address of described broadcast singal is set to broadcast address, and described broadcast address is used for indicating using whole terminal modules as target terminal module; The broadcast singal being provided with described broadcast address is loaded into the transfer resource for transmitting broadcast singal; Or

Receive the data signal that described headend module sends on the transfer resource for transmit data signal, described data signal be described headend module after judging that service signal is data signal, be loaded into described on the transfer resource transmitting data signal;

The broadcast singal that described reception headend module sends on the transfer resource for transmit broadcast singal, or before the data signal that the described headend module of described reception sends on the transfer resource for transmit data signal, also include: receive the first transfer resource allocation rule or the second transfer resource allocation rule that described headend module sends, described first transfer resource allocation rule includes the rule that the transfer resource for transmitting broadcast singal is allocated by described headend module, described second transfer resource allocation rule is the rule that transfer resource is allocated by described headend module according to the data volume of data signal to be sent,

5. data transmission method according to claim 4, it is characterised in that described transfer resource is time slot;

6. a headend module, it is characterised in that including:

Processing unit, for when judging that described service signal is broadcast singal, described broadcast singal is loaded into the transfer resource for transmitting broadcast singal, it is sent to whole terminal module, on the described transfer resource for transmit broadcast singal, described broadcast singal is received respectively for described whole terminal modules, wherein, described processing unit is additionally operable to: the destination address of described broadcast singal is set to broadcast address, described broadcast address is used for indicating using described whole terminal modules as target terminal module, and the broadcast singal being provided with described broadcast address is loaded into the transfer resource for transmitting broadcast singal,

Or, for when judging that described service signal is data signal, obtain the destination address carried in described data signal, and described data signal is loaded into the transfer resource for transmitting data signal, it is sent to the target terminal module that described destination address is corresponding, on the described transfer resource for transmit data signal, receives described data signal for described target terminal module;

Scheduling unit, after judging that described service signal is broadcast singal at described judging unit, described broadcast singal is sent to before whole terminal module by described processing unit, generate the first transfer resource allocation rule, and described first transfer resource allocation rule is broadcast to described whole terminal module, described first transfer resource allocation rule includes the rule that the transfer resource for transmitting broadcast singal is allocated, and receives corresponding broadcast singal for each terminal module according to described first transfer resource allocation rule;

Or, after judging that described service signal is data signal at described judging unit, described data signal is sent to before described target terminal module by described processing unit, generate the second transfer resource allocation rule, and described second transfer resource allocation rule is sent to described target terminal module, described second transfer resource allocation rule is the rule that transfer resource is allocated by the data volume according to data signal to be sent, receives corresponding data signal for described target terminal module according to described second transfer resource allocation rule.

7. headend module according to claim 6, it is characterised in that described scheduling unit is additionally operable to:

8. the headend module according to claim 6 or 7, it is characterised in that described transfer resource is time slot;

9. a terminal module, it is characterised in that including:

Receive unit, for receiving the broadcast singal that headend module sends on the transfer resource for transmit broadcast singal, described broadcast singal is that described headend module is after judging that service signal is broadcast singal, it is loaded into described on the transfer resource transmitting broadcast singal, wherein, the destination address of described broadcast singal is set to broadcast address, and described broadcast address is used for indicating using whole terminal modules as target terminal module; The broadcast singal being provided with described broadcast address is loaded into the transfer resource for transmitting broadcast singal; Or

Control unit, for receiving, at described reception unit, the broadcast singal that described headend module sends on the transfer resource for transmit broadcast singal, or before receiving the data signal that described headend module sends on the transfer resource for transmit data signal, receive the first transfer resource allocation rule or the second transfer resource allocation rule that described headend module sends, described first transfer resource allocation rule includes the rule that the transfer resource for transmitting broadcast singal is allocated by described headend module, described second transfer resource allocation rule is the rule that transfer resource is allocated by the data volume according to data signal to be sent,

10. terminal module according to claim 9, it is characterised in that described transfer resource is time slot;

11. a headend, it is characterised in that include arbitrary in claim 6-8 as described in headend module.

12. a terminal unit, it is characterised in that include the terminal module as described in claim 9 or 10.

13. a communication system, it is characterised in that include headend as claimed in claim 11 and one or more terminal unit as claimed in claim 12.