CN101072227A - Sending system, method and receiving system for video broadcasting system - Google Patents
Sending system, method and receiving system for video broadcasting system Download PDFInfo
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Abstract
The invention discloses the sending system, the method, and the receiving system in video broadcast system. The sending system includes following layers and procedures: application layer provides stream data of program (SDP); wireless resources control layer provides the control information (IC) of SDP, and IC of common channel transmission for concourse layer and MAC layer as well as controls stream data transmission of program in the concourse layer and the MAC layer; based on received IC, the concourse layer partitions SDP; based on received IC, the MAC layer forms MAC frame from partitioned SDP and IC of common channel transmission; through physical layer, the MAC frame is transferred to the receiving system. Also including application layer, concourse layer, wireless resources control layer, MAC layer, and physical layer. The receiving system executes reversible operation of each layer in the sending system to implement receiving SDP. Features are: clear hierarchy, simple and clear procedure for transmitting SDP.
Description
Technical field
The present invention relates to the network communications technology field, be specifically related to transmitting system, method and receiving system in a kind of video broadcast system.
Background technology
Worldwide, new digital television system is progressively replacing the existing analogue radio data system, digital television system can improve the availability of frequency spectrum, and provide higher quality, a greater variety of radio and television services business, thereby satisfy the user to new TV, multimedia and professional demand such as communicate by letter.
Digital television transmission system is the important component part of digital broadcast television system, digital television transmission system must have the basic function of supporting the conventional television broadcast service, but also need have the extendable functions that adapts to Digital Television of new generation and MBMS service and even interactive information service.
Mobile TV is meant that by the mobile phone terminal TV reception at present, mobile TV is thought one of the most popular wireless application in the industry.Mobile TV can adopt the mode of integrating Digital Television and mobile phone to realize, this mode need be installed the microwave digital television receiver module on mobile phone terminal, like this, mobile phone terminal can directly not obtain digital television signal by the link of mobile communications network.
OFDM (Orthogonal Frequency Division Multiplex, OFDM) release of technology is in fact in order to improve the spectrum of carrier utilance, its feature is that each subcarrier is mutually orthogonal, like this, frequency spectrum after the modulation can be overlapped, thereby avoided the phase mutual interference between subcarrier.
OFDM can realize mutually orthogonal modulation system between this each subcarrier by fast fourier transform, adopts the fast fourier transform mode can greatly reduce operand.
Time slicing techniques adopts burst mode to transmit data, each burst timeslice transmits a business, in professional delivery time sheet, should business will occupy the total data bandwidth separately, and point out the moment that next identical services timeslice produces, handheld terminal can receive selected business in the moment of appointment like this, do energy-efficient treatment in professional free time, thereby reduce total average power consumption.
From the angle of receiver, the business datum that receiver receives not is to be continuous transmission means as traditional constant rate of speed, and business datum is to arrive at interval in discrete mode, and therefore, this transmission means can be referred to as burst and transmit.
In order to satisfy the requirement of digital TV video frequency broadcasting, broadcast system must be supported MPEG-2, MPEG-4, H.264 wait video code model and MPEG-2 AAC+, audio coding form such as eAAC+ or AVS xxx H.264, and programme content must comprise real time business and non-real-time services such as real-time video, audio frequency, captions, and support variable rate coding and constant speed to encode, support IP simultaneously, TS, the bearing mode that RAW etc. are different.Broadcast system passes through CA (digital certificate), DRM service protecting methods such as (Digital Right Managements), the control that achieves a butt joint and receive.
Adopt the method for video coding of basic layer and enhancement layer, special constellation mapping method guarantees that receiver can obtain the video frequency program of different definition according to different condition of acceptances.
Digital TV video frequency Radio Broadcasting Agreements layer must be finished storage, control and sending function.Protocol layer must carry out program PSI/SI (PSI/SI) information processing and transmission, at the processing of basic layer and enhancement layer, and the piecemeal of different types of data, length is adaptive, forms the encapsulation process of consolidation form.The Radio Broadcasting Agreements layer must be considered the safe transmission of program, produces the processing and the transmission of key information, finishes the program transmission Determination of priority.The division of radio resource control layer completion logic channel, the distribution of physical channel, the dispatching algorithm of interface-free resources.Protocol layer must carry out the QoS processing and mistake is handled.
The FLO protocol stack is by the upper strata, fluid layer, and key-course and MAC layer constitute, and wherein the MAC layer can be divided into the MAC data channel again, MAC control channel, a MACOIS channel three part.
Upper-layer protocol provides following several function: content of multimedia is carried out relevant treatment, as the compression etc.; Program stream data is mapped on the logic channel, and program stream information and corresponding logic channel ID are sent to fluid layer.This control information that is mapped to the program stream data on the logic channel is sent to key-course.
The function that key-course provides is as follows: with the control information of the control protocol unit of being grouped into encapsulation from the upper strata, the control information after the encapsulation transfers to the MAC control channel.The grouping of each control protocol only comprises a complete control protocol message, the key-course encapsulation be of the control information of the correspondence mappings that sends of upper strata to each program stream data of logic channel.
The function that provides of fluid layer is as follows: the interface that the upper strata program stream data is bundled into the fluid layer of logic channel is provided, and each logic channel is supported three independent data stream at most; Delay constraint to the upper strata program stream data is set; Processing to residual error in the program stream data of upper strata is provided; Provide the essential part of upper strata program stream data and the separate processes of enhancing part.
The function of MAC data channel is: the content of a logic channel is encapsulated in the superframe at its place.
The MAC control channel provides the packing forms of each program stream data control information of logic channel, and control channel often appears at a fixing position in the superframe, and perhaps the position of control channel distribution is not a frequent variations at least; In the control logic channel, in its logic channel, transmit without any the stream that comprises data message.
MAC ISO channel provides network foundation and transmission OIS channel content, equipment to receive and handle the rules and the message of these contents.
The level of FLO protocol stack protocal layers is not strong, FLO MAC layer is divided into three parts and handles data of different types respectively, it is complicated to cause protocol stack to realize, and, FLO adopts the very short time interval to transmit different program datas, cause terminal to need frequent switching on and shutting down to carry out Data Receiving, make the terminal power consumption very serious.
Summary of the invention
The objective of the invention is to, transmitting system, method and receiving system in a kind of video broadcast system are provided, the present invention can make the framework level of protocol stack clearly more demarcated, has simplified the program stream data process of transmitting.
For achieving the above object, the transmitting system in a kind of video broadcast system provided by the invention comprises: application layer, convergence-level, radio resource control layer, MAC layer and physical layer;
Application layer: be used to provide program stream data, and program stream data is transferred to convergence-level;
Radio resource control layer: be used for described program stream data is carried out radio-resource-configuration, determine the control information of each program stream data and the control information of common signal channel transmission, and transferring to convergence-level, MAC layer, radio resource control layer is controlled the program stream data transmission of convergence-level and MAC layer according to this control information;
Convergence-level: be used for the program stream data that receives being integrated into the program stream data of consolidation form, and program stream data carried out piecemeal handle, then, transfer to the MAC layer according to the control of radio resource control layer;
MAC layer: be used for the program stream data that receives, the control information of common signal channel transmission being carried out the MAC framing respectively, and being transferred to physical layer according to the control of radio resource control layer;
Physical layer: be used to send the mac frame that the transmission of MAC layer comes.
Described application layer comprises:
Provide the program stream data module: the initial data, voice data, the video data that are used for providing video broadcast system;
Transmitted in packets module: be used for transferring to convergence-level with after the program stream data packet encapsulation;
Transparent transmission: be used for the program stream data transparent transmission to convergence-level;
Data service module: be used to the data service rate that provides constant and variable;
Program information module: be used to provide different program information table, distinguish program category and programme content;
Service protection module: be used to provide service protection and authentication functions;
Accounting module: be used to provide billing function.
Described radio resource control layer comprises:
Map index module: be used to construct the program map concordance list;
Logical mappings relationship module: be used for determining the mapping relations of each program stream data to logic channel according to program category and program characteristics;
QoS module: be used to realize qos policy;
Modulation strategy module: the coded modulation strategy that is used for determining each program according to the program stream data attribute;
Parameter determination module: be used for determining each program stream priority and determining transmitting and scheduling parameter, the deblocking parameter of each program at physical resource according to the actual conditions of program stream data attribute and program transmission;
Physical mappings relationship module: be used for according to the program stream data attribute and can distribute physical resource to produce the map information table of logic channel to physical channel;
Control information issues module: is used for according to program map concordance list, scheduling parameter and physical parameter, and tectonic system control information table, and the system control information table passed to the MAC layer.
Described convergence-level comprises:
Integrate module one: be used for the program stream data that transmission comes to application layer and carry out buffer memory, and the various types of programs flow data is converged, the various types of programs flow data is integrated into the program stream data of consolidation form;
Integrate module two: the SI information that is used for the program stream data that transmission comes to application layer is carried out integration processing, and the SI message transmission after will integrating is to the MAC layer;
Piecemeal module: be used for the control information that transmission comes according to radio resource control layer the program stream data after integrating is carried out deblocking, and transfer to the MAC layer.
Described MAC layer comprises:
The physical channel mapping block: logical channels is to the mapping of physical channel;
Error Control module: the error control function is provided;
Program stream data becomes frame module: be used for the program stream data that receives is carried out the MAC framing, and transfer to physical layer;
Control information becomes frame module: be used for the MAC framing is carried out in the control information of common signal channel transmission, and transfer to physical layer.
Program stream sending method in a kind of video broadcast system provided by the invention, described method comprises:
A, application layer provide program stream data, and program stream data is transferred to convergence-level;
B, radio resource control layer carry out radio-resource-configuration to described program stream data, determine the control information of each program stream data and the control information of common signal channel transmission, and transferring to convergence-level, MAC layer, radio resource control layer is controlled the program stream data transmission of convergence-level and MAC layer according to this control information;
C, convergence-level are integrated into the program stream data of consolidation form according to the control of radio resource control layer with the program stream data that receives, and program stream data are carried out piecemeal handle, and then, transfer to the MAC layer;
D, MAC layer carry out the program stream data that receives, the control information of common signal channel transmission respectively the MAC framing, and transfer to physical layer according to the control of radio resource control layer;
E, physical layer send the mac frame that receives.
The program stream data that application layer provides among the described step a comprises: initial data, voice data, video data; Described video data comprises: master data, perhaps described video data comprises: master data and enhancing data.
Described step a comprises:
Application layer its program stream data that provides is provided transfer to convergence-level after the packet encapsulation; And/or
Application layer with its program stream data transparent transmission that provides to convergence-level.
Described step b comprises:
Convergence-level is the unit buffer memory with the superframe with the program stream data that the application layer transmission comes, and sends resource allocation request information to radio resource control layer;
Radio resource control layer to this program stream data Resources allocation, and carries out logical channel assignment according to described request information and the distributable resource of physical layer;
Radio resource control layer is determined the positional information of each program in superframe, the positional information of each Business Stream in the program, and is sent to convergence-level.
Described step c also comprises:
When the superframe of convergence-level storage does not send fully, the program stream data that superframe that convergence-level will not send fully and follow-up superframe are integrated into consolidation form, convergence-level is carried out the piecemeal processing according to the program stream data control information that receives to this program stream data, and transfers to the MAC layer.
The present invention also provides the receiving system in a kind of video broadcast system, and described receiving system comprises: application layer, convergence-level, radio resource control layer, MAC layer and physical layer;
Physical layer: the common signal channel mac frame that is used for receiving is sent to the MAC layer, and the positional information of the program stream data that transmission comes according to the MAC layer receives the mac frame of respective program flow data, and is sent to the MAC layer;
MAC layer: be used for parsing control information from the mac frame of common signal channel, and transfer to radio resource control layer, determine the position of the program stream data that needs receive according to the control information that receives, and the notice physical layer, the program stream data mac frame that physical layer transmission is next transfers to convergence-level after separating the MAC encapsulation;
Radio resource control layer: be used for sending the control information that receives the respective program flow data to MAC layer and convergence-level according to the control information that receives;
Convergence-level: be used for according to the control information that receives with the program stream data disintegrate after, transfer to application layer;
Application layer: be used for according to the program stream data repertoire that receives.
Description by technique scheme as can be known, application layer in the transmitting system of the present invention provides program stream data for convergence-level, radio resource control layer provides the control information of program stream data the control information relevant with transmission for convergence-level and MAC layer, convergence-level is carried out the piecemeal processing to program stream data, and the MAC layer is that the MAC framing is carried out in the program stream data of piecemeal and the control information of common signal channel transmission; The present invention is provided with by the operation to above-mentioned each layer execution, makes protocal layers well arranged of video broadcast system, makes the transmission course of program stream data simple, clear; Thereby by technical scheme provided by the invention realized optimizing video broadcast system protocol stack, improve the purpose of protocol stack function.
Description of drawings
Fig. 1 is the transmitting system schematic diagram in the video broadcast system of the embodiment of the invention;
Fig. 2 is the program stream transmission flow figure in the video broadcast system of the embodiment of the invention;
Fig. 3 is that receiving system, the terminal equipment side program stream of the embodiment of the invention receives flow chart.
Embodiment
The invention provides the transmitting system in a kind of video broadcast system, the protocol stack framework of this transmitting system as shown in Figure 1.
Among Fig. 1, the protocol stack in the transmitting system of the present invention comprises: application layer is promptly high-rise, convergence-level, and radio resource control layer, MAC layer and physical layer, the application layer here also can be called high level.Wherein, convergence-level, radio resource control layer and MAC layer can be referred to as data link layer.
High-rise major function is for providing program stream data, and the high level among the present invention can only be supported transmitted in packets, also can only support transparent transmission, can also support transmitted in packets and transparent transmission simultaneously.
High level among the present invention is by providing program stream data module, data service module, transmitted in packets module, transparent transmission, program information module, service protection module and accounting module to form.When high level is only supported transmitted in packets, should not comprise transparent transmission in the high level, in like manner, when high level is only supported transparent transmission, should not comprise the transmitted in packets module in the high level.
The initial data that provides video broadcast system to need, voice data, video data etc. are provided the program stream data module.The video data that the program stream data module provides can only be the master data in the video data, also can and strengthen data for master data, so that the program of different quality is provided for terminal.
The transmitted in packets module is mainly used in the program stream data that the program stream data module is provided and carries out the packet encapsulation processing, and the program stream data after the packet encapsulation processing is transferred to convergence-level.The transmitted in packets module can become the program stream data packet encapsulation TS stream, also the program stream data packet encapsulation can be become IP stream, the program stream data packet encapsulation can also be become the combination of TS stream and IP stream etc., the present invention does not limit the packet encapsulation form of transmitted in packets module to program stream data.
Transparent transmission is mainly used in the program stream data transparent transmission to convergence-level.
The data service module is mainly used in the data service rate that provides constant and variable.
Program information module is mainly used in provides different program information table, and distinguishes the program category and the programme content of each program.
The service protection module is mainly used in provides service protection and authentication operations.
Accounting module is mainly used in providing the processing operation of chargeing.
The control that convergence-level is mainly used in according to radio resource control layer is integrated into the program stream data of consolidation form with the program stream data that receives, and program stream data is carried out piecemeal handle, and then, the program stream data after the piecemeal processing is transferred to the MAC layer.
Convergence-level is made up of integrate module one, integrate module two and piecemeal module.
Integrate module one is mainly used in the program stream data that transmission comes to high level and carries out buffer memory, and various dissimilar program stream data are converged, various dissimilar program stream data are integrated into the program stream data of consolidation form, as IP traffic, TS data flow and initial data etc. being integrated into the program stream data of consolidation form.
SI (information on services) information that integrate module two is mainly used in the program stream data that high level transmission is come is carried out integration processing, and with the SI message transmission after the integration processing to the MAC layer.
The piecemeal module is mainly used in the control information that transmission comes according to radio resource control layer program stream data is carried out deblocking, and the program stream data behind the piecemeal is transferred to the MAC layer.Because SI information is generally less, so the piecemeal module does not need that generally SI information is carried out piecemeal and handles, but, if the SI information after integrate module two is integrated is very many, surpassed the block size of convergence-level definition, then the piecemeal module need all be carried out the piecemeal processing to SI information and program stream data.
Radio resource control layer is mainly used in each program stream data that high level is provided and carries out radio-resource-configuration, determine the control information of each program stream data and the control information of common signal channel transmission, and these control informations are transferred to convergence-level, MAC layer, after these control informations processing through convergence-levels and MAC layer, by physical layer transmission to receiving system.Radio resource control layer also needs according to this control information processing, the transmission course of the program stream data of convergence-level and MAC layer to be controlled.
Radio resource control layer issues module by map index module, logical mappings relationship module, QoS module, modulation strategy module, parameter determination module, physical mappings relationship module and control information and forms.
The map index module is mainly used in control information, program stream length, program stream attribute of the programme information that comes according to the high level transmission such as PSI, IP operation or the like and re-constructs the program map concordance list, the program map concordance list that this re-constructs need send to receiving terminal, distinguishes so that receiving terminal carries out program.
The logical mappings relationship module is mainly used in according to program category and program characteristics determines the mapping relations of each program stream data to logic channel.
The QoS module is mainly used in the execution qos policy.
The modulation strategy module is mainly used in the coded modulation strategy of determining each program stream data according to the attribute of program stream data, selects with the coded modulation scheme of control physical layer.
The parameter determination module is mainly used in the priority of determining each program stream data according to the actual conditions of the attribute of program stream data and program transmission, and determines relevant parameters such as the transmitting and scheduling of each program stream data and deblocking at physical resource.
The physical mappings relationship module is mainly used in according to the attribute of program stream data and assignable physical resource and produces the map information table of logic channel to physical channel.
Control information issues module and is mainly used in according to program map concordance list, other scheduling parameter and physical parameter tectonic system control information table, and the system control information table of above-mentioned structure is passed to the MAC layer.
The MAC layer is mainly used in according to the control of radio resource control layer its program stream data that receives is carried out the processing of MAC framing, the MAC framing is carried out in the control information of its common signal channel that receives transmission handle, and above-mentioned mac frame is transferred to physical layer.
The MAC layer becomes frame module to become frame module to form with control information by Error Control module, program stream data.
The main execution error control and treatment of Error Control module is to carry out effective error control to program stream.
The physical channel mapping block: logical channels is to the mapping of physical channel.
Program stream data becomes frame module to be mainly used in the program stream data that convergence-level transmission is come to carry out the MAC framing, and mac frame is transferred to physical layer.Here, program stream data becomes SI information after the integration that frame module comes convergence-level transmission also as the part of program stream data, that is to say, program stream data becomes frame module that the convergence-level signal transmitted is all carried out the framing processing as program stream data, be added on the program stream data back of consolidation form as the SI information after will integrating, carry out framing then and handle.
The MAC framing is carried out in the control information that control information becomes frame module to be mainly used in the common signal channel transmission that the convergence-level transmission is next, and this mac frame is transferred to physical layer.
Physical layer sends the mac frame that the transmission of MAC layer comes by physical channel.
Above-mentioned is that protocol stack to network side is described, and the protocol stack of receiving terminal is corresponding to the protocol stack of above-mentioned network side, and promptly the protocol stack of receiving terminal also comprises: application layer, convergence-level, radio resource control layer, MAC layer and physical layer.
The physical layer of receiving terminal receives the mac frame that network side sends by common signal channel by physical channel, and the mac frame that it receives is transferred to the MAC layer.Physical layer also can receive the positional information of the next program stream data of MAC layer transmission, and physical layer receives the mac frame of respective program flow data according to this positional information, and is sent to the MAC layer.
The function class of the function of the MAC layer of receiving terminal and network side MAC layer seemingly, the operation that receiving terminal MAC layer is carried out is the inverse process of network side MAC layer executable operations.The function that the MAC layer is realized mainly comprises: the MAC layer is finished the mapping of physical channel to logic channel, and the error control function is provided, so that mac frame is carried out effective error control; The mac frame that MAC comes physical layer transmission is separated MAC and is handled, and the control information that will separate after MAC handles transfers to radio resource control layer, and the program stream data of separating after MAC handles is transferred to convergence-level.The MAC layer is notified physical layer after the positional information of the program stream data that the receiving terminal that receives the radio resource control layer transmission need receive.
The function class of the function of the radio resource control layer of receiving terminal and network side radio resource key-course seemingly, the operation that the radio resource control layer of receiving terminal is carried out is the inverse process of network side radio resource key-course executable operations.The function that radio resource control layer is realized mainly comprises: obtain relevant parameter and system control information tables such as the transmitting and scheduling of coded modulation strategy, each program stream data of map information table to the mapping relations of logic channel, logic channel to physical channel of program map concordance list, each program stream data, each program stream data and deblocking from MAC layer signal transmitted.
Radio resource control layer can carry out program according to the program map concordance list and distinguish; Determine program corresponding physical channel that receiving terminal needs receive to mapping relations, the logic channel of logic channel to the map information table of physical channel according to each program stream data; The decoding demodulation scheme of the program stream data that the receiving terminal needs is received according to the coded modulation policy control physical layer of each program stream data; The transmitting and scheduling of the program stream data that receives according to relevant parameters such as the transmitting and scheduling of each program stream data and deblocking control receiving terminal needs, and the respective handling of the program stream data of the control MAC layer piecemeal that need receive receiving terminal.
The function class of the function of the convergence-level of receiving terminal and network side convergence-level seemingly, the operation that the convergence-level of receiving terminal is carried out is the inverse process of network side convergence-level executable operations.The function that convergence-level realizes mainly comprises: the program stream data of the piecemeal that the transmission of MAC layer is next is carried out combination and is handled, and will be the program stream data of respective type in conjunction with the program stream data disintegrate after handling, as being IP traffic with the next program stream data disintegrate of MAC layer transmission, the program stream data disintegrate that the transmission of MAC layer come is the TS data flow for another example.SI information in the program stream data that the transmission of MAC layer is next is carried out disintegrate and is handled.Certainly, when the SI information in the program stream data had also been carried out the piecemeal processing, convergence-level needs to carry out combination to the SI information of piecemeal earlier to be handled, and then, handles carrying out disintegrate in conjunction with the SI information after the processing again.
Realize that below in conjunction with accompanying drawing 2,3 pairs of protocol stacks of the present invention of accompanying drawing the detailed process that program stream sends, program stream receives describes.
The detailed process that network side protocol stack realization program stream sends as shown in Figure 2.
Among Fig. 2, in step 1, when high level has program stream data to send, the high-rise convergence-level that activates, the program stream data that high level will need to send transfers to convergence-level.
To step 2, the convergence-level program stream data that transmission comes to high level is that unit carries out buffer memory with the superframe.
After to step 3, convergence-level a superframe metadata cache being finished, send resource request command to radio resource control layer.Convergence-level is by resource request command resource block size to its needs of radio resource control layer request.
After receiving resource request command to step 4, radio resource control layer, at first, call the resource allocation function each program stream is carried out resource allocation; Secondly, each Business Stream is carried out logical channel assignment; At last, the calling logic channel calculates the positional information of each Business Stream in the positional information of each program stream in this superframe, the program to the mapping algorithm of physical channel, and buffer memory is carried out in these control informations.
Return resource request to step 5, radio resource control layer to convergence-level and respond order.That is to say that radio resource control layer is according to the resource situation of physical layer reality, whether decision satisfies the requirement of convergence-level, and responds final Resources allocation is fed back in size from order to convergence-level by resource request.
Receive after resource request responds order to step 6, convergence-level, to each traffic data integrate, and the encapsulation of consolidation form, and the data flow after will encapsulating sends to medium access control layer; When the superframe data of convergence-level storage send in this process of transmitting when finishing fully, convergence-level need integrate next superframe data of remaining data and its reception, and the encapsulation of consolidation form.
After setting current superframe transfer of data and finishing, next superframe data need be asked Resources allocation again, then arrive step 7.
After step 7, convergence-level are finished next superframe metadata cache, send resource request command to radio resource control layer.
After receiving resource request command to step 8, radio resource control layer, at first, call the resource allocation function each stream is carried out resource allocation; Secondly, each Business Stream is carried out logical channel assignment; At last, the mapping algorithm of calling logic channel road physical channel calculates the positional information of each Business Stream in the positional information of each program in this superframe, the program, and these control informations of buffer memory.
The positional information calculation Δ t information of program in superframe of calculating in positional information and the step 4 in superframe according to the program that calculates in the step 8 to step 9, radio resource control layer, and the control information of calculating in this information and the step 4 lumped together, as the data in the control information territory of the transmitting control commands that sends to medium access control layer.
After receiving transmitting control commands to step 10, medium access control layer, parse the control information in the transmitting control commands, and the control information that will transmit on common signal channel encapsulates, and then, medium access control layer sends the corresponding control data order that sends to physical layer.Send the control data order and be used to notify physical layer: medium access control layer need be transferred to physical layer with the control information of encapsulation.
Send the encapsulation mac frame of the control information of common signal channel transmission to physical layer to step 11, medium access control layer.Medium access control layer is packaged together the Business Stream in each program according to service ID according to the logical channel number that successively decreases, and sends the corresponding program stream data order that sends to physical layer.Send the program stream data order and be used to notify physical layer: medium access control layer need be transferred to physical layer with the program data information of encapsulation, and medium access control layer sends the encapsulation mac frame of program stream data to physical layer.
The detailed process that terminal equipment side protocol stack realization program stream receives as shown in Figure 3.
Among Fig. 3, receive the mac frame that sends in the common signal channel by physical channel in step 1, physical layer, and to medium access control layer transmission reception control data message, receive control data message and be used to notify medium access control layer: physical layer need be transferred to medium access control layer with common signal channel control data bag, and physical layer sends to medium access control layer with the common signal channel mac frame.
From the common signal channel mac frame, parse control information to step 2, medium access control layer, and send receiving control message, carry the part control information that it parses in this message to radio resource control layer.
Send program location message to step 3, medium access control layer to physical layer.Carry the positional information of superframe head part control information in this message.
To step 4, physical layer according to the positional information in the program location message, the control information of program receiving frame header, head part control information is the positional information of each program stream data.Physical layer is sent to medium access control layer with the control information of program frame header.
After next program frame header control information parses the positional information of each program stream data in the program according to physical layer transmission to step 5, medium access control layer, the program of selecting according to terminal equipment sends the program stream location message to physical layer, carries the positional information of the data flow of the program that terminal equipment selects in the program stream location message.
, carry out the reception of respective program flow data according to the positional information of program stream data in the message and handle after receiving the program stream location message to step 6, physical layer, physical layer is sent to medium access control layer with the program stream data that it receives.
Send activation command to step 7, medium access control layer to convergence-level.
To step 8, subsequently, medium access control layer is separated mac frame to the program stream data of its reception and is handled, and the program stream data after will handling is sent to convergence-level.
Be sent to high level to step 9, convergence-level after with the program stream data decapsulation that receives.High level carries out playing programs according to its program stream data that receives to be handled, and plays to the user.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (11)
1, the transmitting system in a kind of video broadcast system is characterized in that, described transmitting system comprises: application layer, convergence-level, radio resource control layer, MAC layer and physical layer;
Application layer: be used to provide program stream data, and program stream data is transferred to convergence-level;
Radio resource control layer: be used for described program stream data is carried out radio-resource-configuration, determine the control information of each program stream data and the control information of common signal channel transmission, and transferring to convergence-level, MAC layer, radio resource control layer is controlled the program stream data transmission of convergence-level and MAC layer according to this control information;
Convergence-level: be used for the program stream data that receives being integrated into the program stream data of consolidation form, and program stream data carried out piecemeal handle, then, transfer to the MAC layer according to the control of radio resource control layer;
MAC layer: be used for the program stream data that receives, the control information of common signal channel transmission being carried out the MAC framing respectively, and being transferred to physical layer according to the control of radio resource control layer;
Physical layer: be used to send the mac frame that the transmission of MAC layer comes.
2, the transmitting system in a kind of video broadcast system as claimed in claim 1 is characterized in that described application layer comprises:
Provide the program stream data module: the initial data, voice data, the video data that are used for providing video broadcast system;
Transmitted in packets module: be used for transferring to convergence-level with after the program stream data packet encapsulation;
Transparent transmission: be used for the program stream data transparent transmission to convergence-level;
Data service module: be used to the data service rate that provides constant and variable;
Program information module: be used to provide different program information table, distinguish program category and programme content;
Service protection module: be used to provide service protection and authentication functions;
Accounting module: be used to provide billing function.
3, the transmitting system in a kind of video broadcast system as claimed in claim 1 or 2 is characterized in that described radio resource control layer comprises:
Map index module: be used to construct the program map concordance list;
Logical mappings relationship module: be used for determining the mapping relations of each program stream data to logic channel according to program category and program characteristics;
QoS module: be used to realize qos policy;
Modulation strategy module: the coded modulation strategy that is used for determining each program according to the program stream data attribute;
Parameter determination module: be used for determining each program stream priority and determining transmitting and scheduling parameter, the deblocking parameter of each program at physical resource according to the actual conditions of program stream data attribute and program transmission;
Physical mappings relationship module: be used for according to the program stream data attribute and can distribute physical resource to produce the map information table of logic channel to physical channel;
Control information issues module: is used for according to program map concordance list, scheduling parameter and physical parameter, and tectonic system control information table, and the system control information table passed to the MAC layer.
4, the transmitting system in a kind of video broadcast system as claimed in claim 1 or 2 is characterized in that described convergence-level comprises:
Integrate module one: be used for the program stream data that transmission comes to application layer and carry out buffer memory, and the various types of programs flow data is converged, the various types of programs flow data is integrated into the program stream data of consolidation form;
Integrate module two: the SI information that is used for the program stream data that transmission comes to application layer is carried out integration processing, and the SI message transmission after will integrating is to the MAC layer;
Piecemeal module: be used for the control information that transmission comes according to radio resource control layer the program stream data after integrating is carried out deblocking, and transfer to the MAC layer.
5, the transmitting system in a kind of video broadcast system as claimed in claim 1 is characterized in that, described MAC layer comprises:
The physical channel mapping block: logical channels is to the mapping of physical channel;
Error Control module: the error control function is provided;
Program stream data becomes frame module: be used for the program stream data that receives is carried out the MAC framing, and transfer to physical layer;
Control information becomes frame module: be used for the MAC framing is carried out in the control information of common signal channel transmission, and transfer to physical layer.
6, the program stream sending method in a kind of video broadcast system is characterized in that, described method comprises:
A, application layer provide program stream data, and program stream data is transferred to convergence-level;
B, radio resource control layer carry out radio-resource-configuration to described program stream data, determine the control information of each program stream data and the control information of common signal channel transmission, and transferring to convergence-level, MAC layer, radio resource control layer is controlled the program stream data transmission of convergence-level and MAC layer according to this control information;
C, convergence-level are integrated into the program stream data of consolidation form according to the control of radio resource control layer with the program stream data that receives, and program stream data are carried out piecemeal handle, and then, transfer to the MAC layer;
D, MAC layer carry out the program stream data that receives, the control information of common signal channel transmission respectively the MAC framing, and transfer to physical layer according to the control of radio resource control layer;
E, physical layer send the mac frame that receives.
7, the program stream sending method in a kind of video broadcast system as claimed in claim 6 is characterized in that the program stream data that application layer provides among the described step a comprises: initial data, voice data, video data; Described video data comprises: master data, perhaps described video data comprises: master data and enhancing data.
8, the program stream sending method in a kind of video broadcast system as claimed in claim 6 is characterized in that described step a comprises:
Application layer its program stream data that provides is provided transfer to convergence-level after the packet encapsulation; And/or
Application layer with its program stream data transparent transmission that provides to convergence-level.
9, the program stream sending method in a kind of video broadcast system as claimed in claim 6 is characterized in that described step b comprises:
Convergence-level is the unit buffer memory with the superframe with the program stream data that the application layer transmission comes, and sends resource allocation request information to radio resource control layer;
Radio resource control layer to this program stream data Resources allocation, and carries out logical channel assignment according to described request information and the distributable resource of physical layer;
Radio resource control layer is determined the positional information of each program in superframe, the positional information of each Business Stream in the program, and is sent to convergence-level.
10, as the program stream sending method in claim 6 or 7 or the 8 or 9 described a kind of video broadcast systems, it is characterized in that described step c also comprises:
When the superframe of convergence-level storage does not send fully, the program stream data that superframe that convergence-level will not send fully and follow-up superframe are integrated into consolidation form, convergence-level is carried out the piecemeal processing according to the program stream data control information that receives to this program stream data, and transfers to the MAC layer.
11, the receiving system in a kind of video broadcast system is characterized in that, described receiving system comprises: application layer, convergence-level, radio resource control layer, MAC layer and physical layer;
Physical layer: the common signal channel mac frame that is used for receiving is sent to the MAC layer, and the positional information of the program stream data that transmission comes according to the MAC layer receives the mac frame of respective program flow data, and is sent to the MAC layer;
MAC layer: be used for parsing control information from the mac frame of common signal channel, and transfer to radio resource control layer, determine the position of the program stream data that needs receive according to the control information that receives, and the notice physical layer, the program stream data mac frame that physical layer transmission is next transfers to convergence-level after separating the MAC encapsulation;
Radio resource control layer: be used for sending the control information that receives the respective program flow data to MAC layer and convergence-level according to the control information that receives;
Convergence-level: be used for according to the control information that receives with the program stream data disintegrate after, transfer to application layer;
Application layer: be used for according to the program stream data repertoire that receives.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610078356.2A CN101072227A (en) | 2006-05-11 | 2006-05-11 | Sending system, method and receiving system for video broadcasting system |
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| CN200610078356.2A CN101072227A (en) | 2006-05-11 | 2006-05-11 | Sending system, method and receiving system for video broadcasting system |
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| US8073994B2 (en) | 2000-05-03 | 2011-12-06 | At&T Laboratories | Data transfer, synchronising applications, and low latency networks |
| CN103686207A (en) * | 2013-12-04 | 2014-03-26 | 乐视网信息技术（北京）股份有限公司 | Transcoding task scheduling method and system |
| CN103795996A (en) * | 2012-11-01 | 2014-05-14 | 上海贝尔股份有限公司 | 3D video transmission method and device |
| CN102017617B (en) * | 2008-05-07 | 2014-08-13 | 数字源泉公司 | Fast channel zapping and high quality streaming protection over a broadcast channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8346971B2 (en) * | 1999-05-04 | 2013-01-01 | At&T Intellectual Property I, Lp | Data transfer, synchronising applications, and low latency networks |
| US8725903B2 (en) | 1999-05-04 | 2014-05-13 | At&T Intellectual Property I, L.P. | Data transfer, synchronising applications, and low latency networks |
| US8843655B2 (en) | 1999-05-04 | 2014-09-23 | At&T Investments Uk Llc | Data transfer, synchronising applications, and low latency networks |
| US9769274B2 (en) | 1999-05-04 | 2017-09-19 | At&T Investments Uk Llc | Data transfer, synchronising applications, and low latency networks |
| US8073994B2 (en) | 2000-05-03 | 2011-12-06 | At&T Laboratories | Data transfer, synchronising applications, and low latency networks |
| CN102017617B (en) * | 2008-05-07 | 2014-08-13 | 数字源泉公司 | Fast channel zapping and high quality streaming protection over a broadcast channel |
| CN103795996A (en) * | 2012-11-01 | 2014-05-14 | 上海贝尔股份有限公司 | 3D video transmission method and device |
| CN103795996B (en) * | 2012-11-01 | 2016-08-03 | 上海贝尔股份有限公司 | 3D delivery of video method and apparatus |
| CN103686207A (en) * | 2013-12-04 | 2014-03-26 | 乐视网信息技术（北京）股份有限公司 | Transcoding task scheduling method and system |
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