CN101420278A - Method and system for implementing IP packet multiplexing broadcast based on CMMB channel - Google Patents

Abstract

The present invention discloses a method of realizing IP packet multiplexing broadcast on the basis of CMMB channels and a system thereof. According to the present invention, on the basis of not influencing the CMMB channel structure and anti-interference capability, the layer structure of IP packets packaged to the CMMB time slot is simplified by directly packaging the IP packets to an IP packet multiplexing frame and reducing two layers of data segment packaging and multiplexing sub-frame packaging, at the same time, audio and video data and common file data are all packaged in the IP packets for transmission, therefore, universal property and efficiency of the system are improved, and data redundancy and complexity of system realization are reduced.

Description

A kind of method and system that realize the IP packet multiplexing broadcast based on the CMMB channel

Technical field

The present invention relates to the broadcast communication field, relate in particular to a kind of method and system that realize the IP packet multiplexing broadcast based on CMMB (China MobileMultimedia Broadcasting, China Mobile multimedia broadcasting) channel.

Background technology

Having defined CMMB among the radio, film and television industry standard C MMB Channel Modulation standard GY/T 220.1 adopts OFDM (Orthogonal Frequency Division Multiplexing, OFDM) modulation technique to carry out Channel Transmission.The CMMB system was that unit is divided into the CMMB channel frame with the data of transmitting with one second, and one second is a CMMB channel frame.

See also Fig. 1, this figure is the frame assumption diagram of CMMB channel frame, and as seen from the figure, a CMMB channel frame is divided into 40 time slots, each time slot 25ms.It is to make battery-powered terminal only open demodulator and tuner obtains data at the time slot at the data place that self needs in order to allow that time slot is divided in definition, and need not work always, thereby reaches purpose of power saving.Common multiplexed frame of definition can take one or more time slot arbitrarily among the multiplexing standard GY/T220.2GY/T 220.2 of radio, film and television industry standard, each multiplexed frame is identified by multiplexed frame sign MF_ID, MF_ID equals 0 interval scale control information multiplexed frame, and MF_ID is not equal to the common multiplexed frame of 0 interval scale.Time slot 0 is used to transmit multiplexed frame control information control information multiplexed frame just, and the control information multiplexed frame is made up of frame head and control information table.

See also Fig. 2, this figure is the frame assumption diagram of multiplexed frame in the CMMB channel frame, and as seen from the figure, a multiplexed frame is made up of multiplex frame head, multiplexed frame payload and filling, and the miscellaneous service data are all transmitted in the multiplexed frame payload.The multiplexed frame payload is divided into a plurality of multiplexed sub frames again, and each multiplexed sub frame is used to transmit a business.And each multiplexed sub frame is made up of multiplexed sub frame head and load, and load is made up of section again, and section is divided into audio section, video-frequency band and data segment, is respectively applied for to form professional video data, voice data and other data.

See also Fig. 3, this figure is the realization schematic diagram that the IP packet carries out data broadcasting in the prior art by the CMMB channel, its specific implementation process is: the data segment of at first the IP packet being put into GY/T 220.2 definition earlier, the data segment that will encapsulate the IP packet then is encapsulated in the middle of the multiplexed sub frame again, and multiplexed sub frame transmits in the middle of being multiplexed into multiplexed frame again.See also Fig. 4, this figure is the data encapsulation structure chart when the IP data are carried out data broadcasting by the CMMB channel in the prior art, as seen from the figure, this broadcast mode at IP packet outer package data segment, multiplexed sub frame and multiplexed frame three layer data encapsulating structures, data redudancy is higher, and the complexity of system is higher.On the other hand, this broadcast mode has carried out classification transmission in transport layer with audio frequency, video and general data by the own audio frequency and video transformat of definition CMMB, has limited the transmission of audio, video data on the CMMB channel based on the IP flow transmission to a certain extent.

Summary of the invention

The invention provides a kind of method and system that realize the IP packet multiplexing broadcast based on the CMMB channel, by adopting directly the IP data envelope is installed to the mode of carrying out the IP packet multiplexing broadcast in the IP Packet Multiplexing frame, reduced the complexity that data redudancy and system realize.

For achieving the above object, the present invention is by the following technical solutions:

A kind of method based on CMMB channel realization IP packet multiplexing broadcast comprises step:

A, transmitting terminal are put into IP Packet Multiplexing frame with the IP packet, generate IP Packet Multiplexing map information table simultaneously, this IP Packet Multiplexing map information table is inserted in the control information multiplexed frame, will after modulation, be carried out broadcast transmission by the CMMB channel frame that IP Packet Multiplexing frame and control information multiplexed frame constitute;

B, receiving terminal carry out demodulation to the CMMB channel frame that receives, and parse the IP packet from IP Packet Multiplexing frame, extract IP Packet Multiplexing map information simultaneously from the control information multiplexed frame.

Described IP Packet Multiplexing map information comprises one or more in the following information:

The timeslot number that IP Packet Multiplexing frame sum and each IP Packet Multiplexing frame take;

Service lists in the IP Packet Multiplexing frame, Business Name, type of service, Service Component IP address, port and component type;

Whether each time slot data has carried out the indication information of base band forward error correction.

Described control information multiplexed frame is by 0 slot transmission, and described IP Packet Multiplexing frame is by 1 to 39 slot transmission, and one of them IP Packet Multiplexing frame can take one or more time slots.

Described IP Packet Multiplexing frame is made up of IP Packet Multiplexing frame head, IP Packet Multiplexing frame payload.

Comprise audio frequency IP bag, video IP bag and other various types of data I P bags in the described IP Packet Multiplexing frame payload.

Described IP Packet Multiplexing map information table is arranged in the control information multiplexed frame.

A kind of system based on CMMB channel realization IP packet multiplexing broadcast comprises data sending terminal and data receiver,

Described data sending terminal comprises multiplexer and modulation module, and described multiplexer comprises IP Packet Multiplexing frame package module, IP Packet Multiplexing map information insert module and multiplexing output module, wherein,

IP Packet Multiplexing frame package module is used for the IP data envelope is contained in IP Packet Multiplexing frame;

IP Packet Multiplexing map information insert module is used to generate IP Packet Multiplexing map information table, and this IP Packet Multiplexing map information table is sent in the multiplexer insert in the control information multiplexed frame;

Multiplexing output module is used for that IP Packet Multiplexing frame and control information multiplexed frame are carried out multiplexing formation CMMB channel frame data flow and outputs to modulation module;

Modulation module is used for the CMMB channel frame data flow of multiplexer output is modulated, and the data after the modulation are carried out broadcast transmission;

Described data receiver comprises demodulation module, demultiplexing module and IP Packet Multiplexing frame parsing module, wherein,

Demodulation module is used for the CMMB channel frame that receives is carried out demodulation;

Demultiplexing module is used for going out control information multiplexed frame and IP Packet Multiplexing frame from CMMB channel frame demultiplexing, IP Packet Multiplexing frame is sent into IP Packet Multiplexing frame parsing module, and extract IP Packet Multiplexing map information from the control information multiplexed frame;

IP Packet Multiplexing frame parsing module is used for parsing the IP packet from IP Packet Multiplexing frame.

The present invention is on the basis that does not influence CMMB channel architecture and antijamming capability, simplify IP and seal the hierarchical structure that installs to the CMMB time slot, directly IP is sealed and install in the IP Packet Multiplexing frame, reduced the two-layer encapsulation of data segment and multiplexed sub frame, simultaneously audio, video data and ordinary file data all have been encapsulated in transmission in the IP bag, increase system and got versatility, reduced the complexity that data redudancy and system realize, improved efficient.Simultaneously in transport layer for the rarely seen IP packet of receiving terminal, and IP packet upper layer data type can be the data of audio, video data, various file data or other types, improved the versatility of system, made existing various audio and video data streams can make things convenient for to such an extent that transmit by this broadcast system based on the IP flow transmission.

Description of drawings

Fig. 1 is the frame assumption diagram of CMMB channel frame;

Fig. 2 is the frame assumption diagram of multiplexed frame in the CMMB channel frame;

Fig. 3 carries out the realization schematic diagram of data broadcasting by the CMMB channel for IP data in the prior art;

Data encapsulation structure chart when Fig. 4 carries out data broadcasting for IP data in the prior art by the CMMB channel;

Fig. 5 the present invention is based on the structured flowchart that the CMMB channel is realized the system of IP packet multiplexing broadcast;

Fig. 6 the present invention is based on the realization principle flow chart that the CMMB channel is realized the method for IP packet multiplexing broadcast;

Fig. 7 is the frame assumption diagram of CMMB channel frame among the present invention;

Fig. 8 is the frame structure schematic diagram of IP Packet Multiplexing frame head among the present invention;

Fig. 9 is the frame structure schematic diagram of IP Packet Multiplexing frame payload among the present invention;

Figure 10 is the frame structure schematic diagram of control information multiplexed frame among the present invention.

Embodiment

Below in conjunction with each accompanying drawing specific implementation process of the present invention is further described in detail.

See also Fig. 5, this figure the present invention is based on the structured flowchart that the CMMB channel is realized the system of IP packet multiplexing broadcast, as seen from the figure, the present invention is based on the CMMB channel and realize that the system of IP packet multiplexing broadcast comprises data sending terminal and data receiver, described data sending terminal comprises multiplexer and modulation module, wherein

Multiplexer comprises: IP Packet Multiplexing frame package module, IP Packet Multiplexing map information insert module and multiplexing output module.

IP Packet Multiplexing frame package module is used for the IP data envelope is contained in IP Packet Multiplexing frame;

IP Packet Multiplexing map information insert module is used to generate IP Packet Multiplexing map information table, and this IP Packet Multiplexing map information table is sent in the multiplexer insert in the control information multiplexed frame;

Multiplexing output module is used for that IP Packet Multiplexing frame and control information multiplexed frame are carried out multiplexing formation CMMB channel frame data flow and outputs to modulation module;

Modulation module is used for the CMMB channel frame data flow of multiplexer output is modulated, and the data after the modulation are carried out broadcast transmission;

Described data receiver comprises demodulation module, demultiplexing module and IP Packet Multiplexing frame parsing module, wherein,

Demodulation module is used for the CMMB channel frame that receives is carried out demodulation;

Demultiplexing module is used for going out control information multiplexed frame and IP Packet Multiplexing frame from CMMB channel frame demultiplexing, IP Packet Multiplexing frame is sent into IP Packet Multiplexing frame parsing module, and extract IP Packet Multiplexing map information from the control information multiplexed frame;

IP Packet Multiplexing frame parsing module is used for parsing the IP packet from IP Packet Multiplexing frame.

See also Fig. 6, this figure the present invention is based on the realization principle flow chart that the CMMB channel is realized the method for IP packet multiplexing broadcast, the present invention is based on the CMMB channel and realizes that the main process of IP packet multiplexing broadcast is as follows:

Step 10, the IP packet is put into IP Packet Multiplexing frame by IP Packet Multiplexing frame package module, generate IP Packet Multiplexing map information table by IP Packet Multiplexing map information insert module simultaneously, this IP Packet Multiplexing map information table is sent into multiplexer insert MF_ID and transmit in 0 the control information multiplexed frame, this IP Packet Multiplexing map information is used to notify the correlation map information of receiving terminal IP data packet transmission.

In this step, in 39 time slots except time slot 0, select several slots to form one or more IP Packet Multiplexing frames respectively arbitrarily, be used to transmit IP bag data and form the IP data channel according to business demand.

Comprise in the correlation map information of described IP data packet transmission: the timeslot number that IP Packet Multiplexing frame sum and each IP Packet Multiplexing frame take; Service lists in the IP Packet Multiplexing frame, Business Name, type of service, Service Component IP address, port and component type; Whether each time slot data has carried out the indication information of base band FEC (forward error correction).

Step 11, the final dateout of multiplexer is carried out broadcast transmission to modulation module, demodulate the data of transmitting in the time slot at the receiving terminal demodulation module, demultiplexing module extracts IP Packet Multiplexing frame and control information multiplexed frame from the CMMB channel frame, IP Packet Multiplexing frame sent in the IP Packet Multiplexing frame parsing module parse the IP data, the while demultiplexing module extracts IP Packet Multiplexing map information and resolves for receiving control from the control information multiplexed frame, ip packet filter and ESG (Electronic Service Guide, electron service instruction) wait other modules to use.

See also Fig. 7, this figure is the frame assumption diagram of CMMB channel frame among the present invention, and as seen from the figure, a plurality of IP Packet Multiplexing frames and non-IP reuse frame constitute a CMMB channel frame.An IP Packet Multiplexing frame is made up of IP Packet Multiplexing frame head, IP Packet Multiplexing frame payload and filling, and each IP Packet Multiplexing frame is by the MF_ID unique identification, and the MF_ID span is 1～39, and IP Packet Multiplexing frame is used for bearer IP service.Filling part uses 0xFF to fill.

See also Fig. 8, this figure is the frame structure schematic diagram of IP Packet Multiplexing frame head among the present invention, and its concrete syntactic structure is as shown in the table:

Grammer	Figure place	Identifier
			IP Packet Multiplexing frame head
{
			IP Packet Multiplexing frame initial code	32	uimsbf
IP Packet Multiplexing frame head length	8	uimsbf
			Protocol version	5	bslbf
Agreement minimum version number	5	bslbf

The multiplexed frame sign	6	bslbf
			IP broadcast multiplexing service number	8	bslbf
for(i＝1；i<N；i++)
			{
Professional length	24	uimsbf
			}
CRC_32	32	uimsbf
			}

The implication of each field is as follows in the last table:

IP Packet Multiplexing frame initial code: 32 bit fields, identify the beginning of an IP Packet Multiplexing frame, be 0x00000001;

IP Packet Multiplexing frame head length: 8 bit fields, sign IP Packet Multiplexing frame head length, bag IP Packet Multiplexing frame initial code and frame head parameter do not comprise CRC_32, are unit with the byte;

Protocol version: 5 bit fields, the version number of sign multiplex protocol, value is 2 when using the IP Packet Multiplexing agreement of the present invention's definition;

Agreement minimum version number: the minimum version sequence number of the multiplex protocol that 5 bit fields, sign can be compatible;

Multiplexed frame sign: 6 bit fields, the MF_ID of sign IP Packet Multiplexing frame;

Keep: 2 bit fields, reserve;

The professional number of IP Packet Multiplexing frame: 8 bit fields, the number of services that comprises in the sign IP Packet Multiplexing frame;

IP broadcast multiplexing service length, 24 bit fields, professional length in the sign IP Packet Multiplexing frame, unit is a byte;

The CRC_32:32 bit field comprises crc value.

See also Fig. 9, this figure is the frame structure schematic diagram of IP Packet Multiplexing frame payload among the present invention, and IP Packet Multiplexing frame is used for bearer IP service.Audio frequency and video business and data service are a plurality of continuous IP bags, and IP Packet Multiplexing frame payload is wrapped by audio frequency IP bag, video IP and comprises other types data I P bag and forms among the present invention, and IP Packet Multiplexing frame payload can not surpass the physical channel capacity.

See also Figure 10, this figure is the frame structure schematic diagram of control information multiplexed frame among the present invention, and as seen from the figure, the MF_ID=0 of control information multiplexed frame among the present invention is made of control information multiplexed frame frame head and control information multiplexed frame payload.

The present invention has carried out expanded definition to control information multiplexed frame frame head, and its sentence structure is as shown in the table:

Sentence structure	Figure place	Identifier
			Multiplex frame head ()
{
			The multiplexed frame initial code	32	uimsbf
Multiplex frame head length	8	uimsbf
			Protocol version	5	bslbf
Agreement minimum version number	5	bslbf
			The multiplexed frame sign	6	bslbf
The urgent broadcast indication	2	bslbf
			The next frame parameter indication	1	bslbf
IP Packet Multiplexing map information table updating sequence number	3	bslbf
			The indication of control table updating sequence number lead	2	bslbf
Update sequence number of network information list	4	bslbf
			Continue period service duplexing configuration list and upgrade sequence number	4	bslbf
Continue the business configuration table updating sequence number	4	bslbf
			Updated rank in short-period service duplexing configuration list	4	bslbf
Short time service allocation table upgrades sequence number	4	bslbf
			ESG upgrades sequence number	4	bslbf
Keep	4	bslbf
			System message list quantity	4	bslbf
Network information table length	24	uimsbf

for(i＝1；i<N；i++)
			{
Control information table length	24	uimsbf
			}
If (next frame parameter indication==1)
			{
Next frame parameter	40
			}else null
CRC32
		32	uimsbf
}

The implication of each field is as follows in the last table:

The multiplexed frame initial code: 32 bit fields, the beginning of a multiplexed frame of sign is 0x00000001;

Multiplex frame head length: 8 bit fields, expression multiplex frame head length comprises multiplexed frame initial code and next frame parameter, does not comprise CRC_32, is unit with the byte;

Protocol version: 5 bit fields, the version number of sign multiplex protocol, value is 2 when using the IP Packet Multiplexing agreement of the present invention's definition;

Agreement minimum version number: the minimum version sequence number of the multiplex protocol that 5 bit fields, sign can be compatible;

Multiplexed frame sign: 6 bit fields, the MF_ID of sign multiplexed frame;

The urgent broadcast indication: 2 bit fields, if this parameter is ' 00 ', being illustrated in first broadcast channel frame does not subsequently have urgent broadcast, other value is used for the expanded application of urgent broadcast in the future;

The next frame parameter indication: 1 bit field, indicate the key parameter that whether includes next multiplexed frame (identical MF_ID) in the multiplex frame head, ' 0 ' expression does not have, and ' 1 ' expression has;

IP Packet Multiplexing business information mapping table updating sequence number, 3 bit fields, it is effective when protocol version is 2, and it is only effective in the control information frame, from 0-7 incremental representation data broadcast service mapping table renewal is arranged, when protocol version is 1, in the control information frame,, in Frame, taken by the CA standard for keeping;

The indication of control table updating sequence number lead, 2 bit fields, the table updating sequence number of respectively controlling in the indication multiplex frame head shifts to an earlier date several broadcast channel frame notices, wherein, previous broadcast channel frame is put forward in ' 00 ' expression, ' 01 ' expression is two broadcast channel frame in advance, and ' 10 ' expression is three broadcast channel frame in advance, and ' 11 ' keeps.

Update sequence number of network information list, 4 bit fields, expression update sequence number of network information list.When changing appearred in the information of describing in the network information table (except the system time), update sequence number of network information list needed to change, the value that in 0～15 scope, circulates, and each the renewal adds 1;

Continue period service duplexing configuration list and upgrade sequence number: 4 bit fields, expression continue period service duplexing configuration list and upgrade sequence number.When changing appearred in the information of describing in continuing period service duplexing configuration list, continuing period service duplexing configuration list renewal sequence number needed to change, the value that in 0～15 scope, circulates, and each the renewal adds 1;

Continue the business configuration table updating sequence number: 4 bit fields, expression continues the business configuration table updating sequence number, and when changing appearred in the information of describing in continuing service allocation list, continuing the business configuration table updating sequence number needed to change, the value that in 0～15 scope, circulates, the each renewal adds 1;

Updated rank in short-period service duplexing configuration list: 4 bit fields, expression updated rank in short-period service duplexing configuration list.When changing appearred in the information of describing in the short-period service duplexing configuration list, updated rank in short-period service duplexing configuration list needed to change, the value that in 0～15 scope, circulates, and each the renewal adds 1;

Short time service allocation table upgrades sequence number: 4 bit fields, the expression short time service allocation table upgrades sequence number.When changing appearred in the information of describing in the short time service allocation table, short time service allocation table upgrades sequence number to be needed to change, the value that in 0～15 scope, circulates, and each the renewal adds 1;

ESG upgrades sequence number: 4 bit fields, and keep for ESG to use;

Multiplexed sub frame number: 4 bit fields, the multiplexed sub frame quantity that comprises in the expression multiplexed frame;

Multiplexed sub frame 1 length: 24 bit fields, the length of first multiplexed sub frame in the expression multiplexed frame, unit is a byte;

Multiplexed sub frame length: 24 bit fields, other multiplexed sub frame length in the expression multiplexed frame except that first multiplexed sub frame, unit is a byte;

Next frame parameter: 40 bit fields, represent the key parameter of next multiplexed frame (identical MF_ID) to be followed successively by the length (24 bit) of multiplex frame head length (8 bit), multiplexed sub frame 1 and the head length degree (8 bit) of multiplexed sub frame 1;

The CRC_32:32 bit field comprises crc value.

Control information frame payload is used for carrying the control information table and the IP Packet Multiplexing map information table of GY/T 220.1 definition among the present invention.Control information table use table identification number identifies, and shows being allocated as follows shown in the table of identification number:

Value	Describe
		0x00	Keep
0x01	Network information table NIT
		0x02	Continue period service duplexing configuration list CMCT
0x03	Continue service allocation list CSCT
		0x04	Short-period service duplexing configuration list SMCT
0x05	Short time service allocation table SSCT
		0x06	The basic description list of ESG
0x07	The CA table, the CA standard definition
		0x08～0x0F	Keep
0x10	Urgent broadcast
		0x11	IP Packet Multiplexing map information table
0x12	The FEC table
		0x12～0xFF	Keep

IP Packet Multiplexing map information table is used for all IP packet multiplexing broadcast business are carried out complete description among the present invention, and its sentence structure is as shown in the table:

Sentence structure	Figure place	Identifier
			Data broadcast service mapping table ()
{
			The table identification number	8	bslbf
IP Packet Multiplexing map information table updating sequence number	4	uimsbf

IP Packet Multiplexing map information table length	16	uimsbf
			Keep
	2	bslbf
			IP Packet Multiplexing frame sum	6	uimsbf
IP Packet Multiplexing frame circulation (for i=0; I＜N0; I++)
			{
Keep	2	bslbf
			IP Packet Multiplexing sign	6	bslbf
Keep	2	bslbf
			Take the time slot sum	6	uimsbf
{
			Keep	1	bslbf
The FEC sign	1	uimsbf
			Timeslot number	6	uimsbf
}
			Keep	4	bslbf
Professional sum in the IP Packet Multiplexing	12	uimsbf
			Service information list circulation (for i=0; I＜N0; I++)
{
			Service identification number	12	bslbf
Keep	3	bslbf
			Encryption indicator	1
Traffic descriptor ()
			Other descriptors ()
}
			}
CRC32		32

}

The implication of each field is as follows in the last table:

The table identification number: 8 bit fields, the description of above-mentioned his-and-hers watches identification number assignment is seen in concrete definition.

IP Packet Multiplexing map information table updating sequence number, 4 bit fields, expression IP Packet Multiplexing map information table updating sequence number.When changing appearred in the information of describing in this table, this renewal sequence number needed to change, the value that in 0～7 scope, circulates, and each the renewal adds 1;

IP Packet Multiplexing map information table length: 16 bit fields, provided immediately following the IP Packet Multiplexing map information table data after this field, comprise the byte length of CRC32;

IP Packet Multiplexing frame sum: 6 bit fields have provided the quantity of the broadcasting multiplex frame in the CMMB channel frame that this frequency transmitted;

IP Packet Multiplexing frame circulation: be used for each broadcasting multiplex frame is described respectively;

IP Packet Multiplexing frame identification: 6 bit fields, the MF_ID of sign multiplexed frame;

Take the time slot sum: 6 bit fields, represent the time slot sum that this IP Packet Multiplexing frame takies;

The FEC sign: 1 bit field, whether the time slot that timeslot number identified that expression is closelyed follow has later used base band FEC verification;

Timeslot number: 6 bit fields, represent the time-gap number that this IP Packet Multiplexing frame takies;

Professional sum in the IP Packet Multiplexing frame: 12 bit fields have provided the sum of the business of transmitting in this IP Packet Multiplexing frame;

Service identification number: 12 bit fields, represent the service identification of transport service in this IP Packet Multiplexing frame;

Encryption indicator: 1 bit field, represent whether this business encrypts at the IP layer;

Traffic descriptor: be used for the concrete feature of business is described;

Other descriptors: can be as required define in expanded definition from now on or by user oneself;

The CRC_32:32 bit field comprises crc value.

Descriptor is identified by descriptor tag among the present invention, and the value of descriptor tag is seen as shown in the table:

The descriptor tag value

Describe

0x00	Keep
		0x01	Traffic descriptor
0x02-0xFF	User definition

Wherein, the sentence structure of traffic descriptor is as shown in the table:

Sentence structure	Figure place	Identifier
			Traffic descriptor ()
{
			Descriptor tag	8	bslbf
The traffic descriptor message length	16	uimsbf
			Type of service	8	bslbf
Business Name length	8	uimsbf
			For(i＝0；i<N1；i++)
{
			The Business Name byte	8	bslbf
}
			Service supplier title length	8	uimsbf
For(i＝0；i<N2；i++)
			{
Service supplier title byte	8	bslbf
			}
Host-host protocol	1	Bslbf, value 0x00 are IPv4, and value 0x01 is IPv6
			Component count	7	Uimsbf
For(i＝0；i<M；i++)
			{

If (host-host protocol==1)
			{
The IPv4 multicast address	32
			}		bslbf
Else If (host-host protocol=2)
			{
The IPv6 multicast address	128	bslbf
			}
Port numbers	16	uimsbf
			Stream type	8	The bslbf definition is seen below
}
			Extended description length	8
{
			The extended description byte	8
}
			}

The implication of each field is as follows in the last table:

Descriptor tag: 8 bit fields are used to identify different descriptors;

The traffic descriptor message length: 16 bit fields provide the total length of descriptor, the byte number of the data division that begins after this field in the expression descriptor;

Type of service: 8 bit fields, defined professional type, concrete value sees the following form:

The type of service value	Describe
		0x00	Undefined
0x01	The IP packet multiplexing broadcast business that comprises audio, video data

0x02	The IP packet multiplexing broadcast business that comprises the audio broadcasting data
		0x03	The IP packet multiplexing broadcast business that does not comprise audio, video data
0x04	The IP packet multiplexing broadcast business that comprises professional index
		0x05	The IP packet multiplexing broadcast business that comprises the urgent broadcast data
0x06-0x1F	Keep
		0x20-0xFF	User definition

Business Name length: 8 bit fields are the length that unit provides the follow-up Business Name of this field with the byte;

Business Name byte: 8 bit fields, the Business Name data that provide successively with byte mode;

Service supplier title length, 8 bit fields are the length that unit provides the follow-up service supplier title of this field with the byte;

Service supplier title byte, 8 bit fields are the service supplier name data that unit provides successively with the byte;

Host-host protocol: 1 bit field, value 0x00 is IPv4, value 0x01 is IPv6;

Component count: 7 bit fields provide the quantity of assembly;

The IPv4 multicast address: 32 bit fields provide the multicast ip address of IPv4;

The IPv6 multicast address: 128 bit fields provide the multicast ip address of IPv6;

Port numbers: 16 bit fields provide multicast port number;

Stream type: 8 bit fields, identified the stream type of assembly, its concrete value is as shown in the table:

The stream type value	Describe
		0x00	Undefined
0x01	The data flow that comprises video data

0x02	The data flow that comprises voice data
		0x03	Common IP traffic
0x04-0x1F	Keep
		0x20-0xFF	User definition

Extended description length: 8 bit fields are the length that unit provides the follow-up extended description of this field with the byte;

The extended description byte: 8 bit fields are the extended description data that unit provides successively with the byte.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (7)

1, a kind of method based on CMMB channel realization IP packet multiplexing broadcast is characterized in that, comprises step:

A, transmitting terminal are put into IP Packet Multiplexing frame with the IP packet, generate IP packet multiplexing broadcast map information table simultaneously, this IP Packet Multiplexing map information table is inserted in the control information multiplexed frame, will after modulation, be carried out broadcast transmission by the CMMB channel frame that IP Packet Multiplexing frame and control information multiplexed frame constitute;

B, receiving terminal carry out demodulation to the CMMB channel frame that receives, and parse the IP packet from IP Packet Multiplexing frame, extract IP Packet Multiplexing map information simultaneously from the control information multiplexed frame.

2, the method for claim 1 is characterized in that, described IP Packet Multiplexing map information comprises one or more in the following information:

The timeslot number that IP Packet Multiplexing frame sum and each IP Packet Multiplexing frame take;

Service lists in the IP Packet Multiplexing frame, Business Name, type of service, Service Component IP address, port and component type;

Whether each time slot data has carried out the indication information of base band forward error correction.

3, the method for claim 1 is characterized in that, described control information multiplexed frame is by 0 slot transmission, and described IP Packet Multiplexing frame is by 1 to 39 slot transmission, and one of them IP Packet Multiplexing frame can take one or more time slots.

As claim 1 or 3 described methods, it is characterized in that 4, described IP Packet Multiplexing frame is made up of IP Packet Multiplexing frame head, IP Packet Multiplexing frame payload.

5, the method for claim 1 is characterized in that, comprises audio frequency IP bag, video IP bag and other various types of data IP bag in the described IP Packet Multiplexing frame payload.

6, the method for claim 1 is characterized in that, described IP Packet Multiplexing map information table is arranged in the control information multiplexed frame of time slot 0 transmission.

7, a kind of system based on CMMB channel realization IP packet multiplexing broadcast comprises data sending terminal and data receiver, it is characterized in that,

Described data sending terminal comprises multiplexer and modulation module, and described multiplexer comprises IP Packet Multiplexing frame package module, IP Packet Multiplexing map information insert module and multiplexing output module, wherein,

IP Packet Multiplexing frame package module is used for the IP data envelope is contained in IP Packet Multiplexing frame;

IP Packet Multiplexing map information insert module is used to generate IP Packet Multiplexing map information table, and this IP Packet Multiplexing map information table is sent in the multiplexer insert in the control information multiplexed frame;

Multiplexing output module is used for that IP Packet Multiplexing frame and control information multiplexed frame are carried out multiplexing formation CMMB channel frame data flow and outputs to modulation module;

Modulation module is used for the CMMB channel frame data flow of multiplexer output is modulated, and the data after the modulation are carried out broadcast transmission;

Described data receiver comprises demodulation module, demultiplexing module and IP Packet Multiplexing frame parsing module, wherein,

Demodulation module is used for the CMMB channel frame that receives is carried out demodulation;

Demultiplexing module is used for going out control information multiplexed frame and IP Packet Multiplexing frame from CMMB channel frame demultiplexing, IP Packet Multiplexing frame is sent into IP Packet Multiplexing frame parsing module, and extract IP Packet Multiplexing map information from the control information multiplexed frame;

IP Packet Multiplexing frame parsing module is used for parsing the IP packet from IP Packet Multiplexing frame.

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