CN106604239A - Improved China mobile multimedia broadcasting (CMMB) system-based emergency message broadcasting method and system - Google Patents
Improved China mobile multimedia broadcasting (CMMB) system-based emergency message broadcasting method and system Download PDFInfo
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- CN106604239A CN106604239A CN201611013579.0A CN201611013579A CN106604239A CN 106604239 A CN106604239 A CN 106604239A CN 201611013579 A CN201611013579 A CN 201611013579A CN 106604239 A CN106604239 A CN 106604239A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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Abstract
The invention discloses an improved China mobile multimedia broadcasting (CMMB) system-based emergency message broadcasting method and a system. The method comprises the steps of dividing emergency broadcast data payload into emergency broadcast data segments of 2*10(1024) in byte length; copying the emergency broadcast data segments to obtain two identical emergency broadcast messages; packaging the two emergency broadcast messages in the CMMB emergency broadcast table format; adding the emergency broadcast messages into the physical layer processing flow of the spread spectrum modulation; and sending out the emergency broadcast messages through up-conversion. According to the technical scheme of the invention, the system can resist a variety of interferences, so that the delivery of emergency broadcast messages is ensured.
Description
Technical field
The communications field of the present invention, and in particular to one kind is based on the improved emergent message broadcasting method of CMMB system and system.
Background technology
Natural disaster alarm emergency mechanism very important reality meaning for the protection of people's life and property has
Justice, therefore, Erecting and improving, unimpeded emergent broadcast mechanism are conducive to promptly and accurately grasping relevant integrated information, and scientific analysis is ground
Sentence, self and mutual medical aid measure is taken in time, can effectively reduce the impact of accident.
Existing emergent broadcast technology typically notices emergency by broadcast communication system to the public, so as to fast and effectively
Rescue victims of the disaster's life and property, stable disaster area social order, however, electromagnetic interference of disaster field generation etc. has had a strong impact on and answered
The communication quality of anxious broadcast, is unfavorable for effective transmission of integrated information.
Meanwhile, with China Emergency System build it is gradually perfect, emergent broadcast is most wide, minimum by catastrophic effects to cover
Advantage obtain the support of policies and regulations, need badly based on CMMB, set up unified and jamproof communication system, realize maximum
Limit emergency information is broadcast to broad masses of the people.
The content of the invention
Technical problem：Various interference can be effective against, it is ensured that emergent broadcast message is sent to.
In view of this, one kind is embodiments provided based on the improved emergent message broadcasting method of CMMB system and be
System, to solve above-mentioned technical problem.
The solution of problem is：One kind is provided and is based on the improved emergency information broadcasting method of CMMB system, including step：
Front-end edit emergent broadcast data load is broadcasted in broadcast；
Emergent broadcast data load is divided into into the emergent broadcast data segment of 2^10 (1024) byte length；
Emergent broadcast data segment is replicated, two emergent broadcast information of identical are obtained；
Two emergent broadcast message are packaged according to CMMB emergent broadcast tableau formats；
The physical layer process flow process of band spectrum modulation is added to broadcast message of meeting an urgent need, then Jing up-conversions send.
Further, the step of two emergent broadcast message is packaged according to CMMB emergent broadcast tableau formats
In：
Two emergent broadcast information are respectively mounted CMMB emergent broadcast tableau formats and are packaged, and are arranged in after the completion of encapsulation multiple
With the corresponding first control information table of frame format and the position of the second control information table.Should to two of same content in this programme
Anxious broadcast message is encapsulated, and this will reduce the probability that emergent broadcast information is lost.
Further, the physical layer process flow process of band spectrum modulation, Ran Houjing are added in described pair of emergent broadcast message
In the step of up-conversion sends：
The physical layer process flow process of band spectrum modulation is added to the emergent broadcast information in the second control information table, then
Jing up-conversions send；
And, the emergent broadcast information in the first control information table is then issued according to CMMB standards.In this programme, fully
The emergent broadcast mechanism of compatible original CMMB system, carries out alternately sending out in control logic channel by way of spread spectrum and non-spread spectrum
Send, on the basis of retaining original mechanism advantage, effectively resist various interference factors, advantageously reduce various CMMB standards terminals and disliking
Demodulation signal-noise ratio threshold in bad environment, so ensure that user terminal is being blocked or other situations cause signal quality
During deterioration, remain to farthest be properly received emergent broadcast message.
Further, the formation of the emergent broadcast data segment includes process：
The emergent broadcast message table of identical content is made a distinction with table identification number, using the emergent broadcast table of band spectrum modulation
Table identification number is set to 0x11, and the emergent broadcast table table identification number of original CMMB reference formats is still 0x10；
Present segment sequence number and most back segment sequence number deposit respectively the data message sequence number after being segmented, from the beginning of 0；
The emergent broadcast data segment of regular length is stored in into corresponding data segment location, and is shown with 13 data lengths
The length of actual emergent broadcast data segment；
It is made up of the emergent broadcast gauge outfit of set form, emergent broadcast data segment 0x10 and cyclic redundancy check (CRC) (CRC_32)
First control information table, meanwhile, by the emergent broadcast gauge outfit of set form, emergent broadcast data segment 0x11 and cyclic redundancy check (CRC)
(CRC_32) the second control information table is constituted.The first control information table of correspondence and the second information control table have carried out emergent broadcast number
According to the formation of section, it is to avoid information is obscured, cause confusion.
Further, the process of the physical layer process flow process of the addition band spectrum modulation includes：
The emergent broadcast data flow that upper strata edits is processed according to CMMB channel code and interleaving forms, is encoded
Output bit afterwards；
Output bit after coding carries 4 coding output bits per 18 senary symbols by band spectrum modulation, until
One complete emergent broadcast message of transmission；
Each senary symbol is mapped, output code flow is obtained, according to OFDM patterns data subcarrier is added to
Position；
Subsequent physical-layer handling process is entered according to the CMMB flow processs of scrambling, OFDM modulation, framing, molding filtration and up-conversion
Row is processed, and the radiofrequency signal of generation is sent by connecting station system.Specific band spectrum modulation mode has been selected in this programme
Emergent broadcast message is processed, relatively conventional spread spectrum mode, it is not necessary to the serial generator of spread spectrum, more conducively hardware reality
It is existing.
Further, it is described emergent broadcast data load is divided into 2^10 (1024) byte length data segment the step of
In：
Division is not made less than the emergent broadcast message of 1024 bytes for length to process.
Further, it is described emergent broadcast data load is divided into 2^10 (1024) byte length data segment the step of
Before：
First emergent broadcast data load is segmented, it is of short duration to be stored in emergent broadcast data in units of byte, each
The length range of emergent broadcast data segment is 2^13 (8192) byte.
Further, it is to emergent broadcast data load according to national regulation and Xu Ang pipe standards that front end is broadcasted in the broadcast
Enter edlin.
Present invention also offers a kind of be based on the improved emergent message broadcasting system of CMMB system, including：
Edit cell, for broadcast front-end edit emergent broadcast data load is broadcasted；
Division unit, for emergent broadcast data load to be divided into the emergent broadcast data of 2^10 (1024) byte length
Section；
Copied cells, for emergent broadcast data segment to be replicated, obtains two emergent broadcast information of identical；
Encapsulation unit, for being packaged according to CMMB emergent broadcast tableau formats to two emergent broadcast message；
Adjustment converter unit, is added the physical layer process flow process of band spectrum modulation, then on Jing to broadcast message of meeting an urgent need
Frequency conversion sends.
Further, arbitrary disclosed emergent message broadcasting method of the invention has been used.This programme is effectively compatible existing
CMMB standard terminals, and there is provided a kind of anti-interference emergent broadcast communication scheme with good autgmentability.
Using above-mentioned technical proposal, the present invention can at least obtain following technique effects：
First, the present invention has selected specific band spectrum modulation mode to process emergent broadcast, it is ensured that user terminal
Disaster field etc. blocked or other adverse circumstances under, still be able to farthest be properly received emergent notice；
Meanwhile, the present invention has carried out the division of data segment to emergent broadcast data load in advance, and this further reduction is used
Family terminal disaster field etc. blocked or other adverse circumstances under, meet an urgent need message losing probability, provide for disaster field
Effectively communication is supported.
Description of the drawings
Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to institute in embodiment of the present invention description
The accompanying drawing that needs are used is briefly described, it should be apparent that, drawings in the following description are only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can be with according to present invention enforcement
The content of example and these accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of flow chart based on the improved emergency information broadcasting method of CMMB system of the embodiment of the present invention；
Fig. 2 is the detail flowchart of the flow chart of emergency information broadcasting method of the present invention；
Fig. 3 is the multiplexed frame position view of control information table of the present invention；
Fig. 4 is emergent broadcast physical layer process flow chart in the present invention；
Fig. 5 is a kind of schematic diagram based on the improved emergent message broadcasting system of CMMB system of the present invention.
Through accompanying drawing, it should be noted that similar label is used to describe same or analogous element, feature and structure.
Specific embodiment
The disclosure for describing to help comprehensive understanding to be limited by claim and its equivalent referring to the drawings is provided
Various embodiments.Hereinafter description includes the various details for helping understand, but these details will be considered only to be example
Property.Therefore, it will be appreciated by those of ordinary skill in the art that without departing from the scope of the present disclosure and spirit in the case of, can be right
Various embodiments described herein makes various changes and modifications.In addition, in order to clear and succinct, known function and construction are retouched
Stating to be omitted.
Term and vocabulary used in following description and claims is not limited to document implication, but only by inventor
For enabling the disclosure clearly and as one man to be understood.Therefore, to those skilled in the art it should be apparent that carrying
Description for following various embodiments of this disclosure merely to exemplary purpose, and it is unrestricted by claims and its
The purpose of the disclosure that equivalent is limited.
It should be understood that unless context is clearly indicated in addition, otherwise singulative also includes plural.Thus, for example,
Include the reference to one or more such surfaces to the reference of " assembly surface ".
Fig. 1 is a kind of flow chart based on the improved emergency information broadcasting method of CMMB system of the embodiment of the present invention, and Fig. 2 is
The detail flowchart of the flow chart of emergency information broadcasting method of the present invention, the embodiment with reference to shown in Fig. 1 and Fig. 2, Fig. 1 and Fig. 2
Method include step：
S1:Front-end edit emergent broadcast data load is broadcasted in broadcast；
S2:Emergent broadcast data load is divided into into the emergent broadcast data segment of 2^10 (1024) byte length；
S3:Emergent broadcast data segment is replicated, two emergent broadcast information of identical are obtained；
S4:Two emergent broadcast message are packaged according to CMMB emergent broadcast tableau formats；
S5:The physical layer process flow process of band spectrum modulation is added to broadcast message of meeting an urgent need, then Jing up-conversions send out
Go.
Using above-mentioned technical proposal, the present invention can at least obtain following technique effects：
First, the present invention has selected specific band spectrum modulation mode to process emergent broadcast, it is ensured that user terminal
Disaster field etc. blocked or other adverse circumstances under, still be able to farthest be properly received emergent notice；
Meanwhile, the present invention has carried out the division of data segment to emergent broadcast data load in advance, and this further reduction is used
Family terminal disaster field etc. blocked or other adverse circumstances under, meet an urgent need message losing probability, provide for disaster field
Effectively communication is supported.
The present embodiment is preferred, the step of two emergent broadcast message are packaged according to CMMB emergent broadcast tableau formats
In S4：
Two emergent broadcast information are respectively mounted CMMB emergent broadcast tableau formats and are packaged, and are arranged in after the completion of encapsulation multiple
With the corresponding first control information table of frame format and the position of the second control information table.Should to two of same content in this programme
Anxious broadcast message is encapsulated, and this will reduce the probability that emergent broadcast information is lost.
The present embodiment is preferred, and to broadcast message of meeting an urgent need the physical layer process flow process of band spectrum modulation, Ran Houjing are added
In the step of up-conversion sends S5：
The physical layer process flow process of band spectrum modulation is added to the emergent broadcast information in the second control information table, then
Jing up-conversions send；
And, the emergent broadcast information in the first control information table is then issued according to CMMB standards.In this programme, fully
The emergent broadcast mechanism of compatible original CMMB system, carries out alternately sending out in control logic channel by way of spread spectrum and non-spread spectrum
Send, on the basis of retaining original mechanism advantage, effectively resist various interference factors, advantageously reduce various CMMB standards terminals and disliking
Demodulation signal-noise ratio threshold in bad environment, so ensure that user terminal is being blocked or other situations cause signal quality
During deterioration, remain to farthest be properly received emergent broadcast message.
Fig. 3 is the multiplexed frame position view of control information table of the present invention, with reference to Fig. 3, is understood with reference to Fig. 1 and Fig. 2：
The present embodiment is preferred, and the formation of emergent broadcast data segment includes process：
The emergent broadcast message table of identical content is made a distinction with table identification number, using the emergent broadcast table of band spectrum modulation
Table identification number is set to 0x11, and the emergent broadcast table table identification number of original CMMB reference formats is still 0x10；
Present segment sequence number and most back segment sequence number deposit respectively the data message sequence number after being segmented, from the beginning of 0；
The emergent broadcast data segment of regular length is stored in into corresponding data segment location, and is shown with 13 data lengths
The length of actual emergent broadcast data segment；
It is made up of the emergent broadcast gauge outfit of set form, emergent broadcast data segment 0x10 and cyclic redundancy check (CRC) (CRC_32)
First control information table, meanwhile, by the emergent broadcast gauge outfit of set form, emergent broadcast data segment 0x11 and cyclic redundancy check (CRC)
(CRC_32) the second control information table is constituted.The first control information table of correspondence and the second information control table have carried out emergent broadcast number
According to the formation of section, it is to avoid information is obscured, cause confusion.
Fig. 4 is emergent broadcast physical layer process flow chart in the present invention, with reference to Fig. 4, is understood with reference to Fig. 1-Fig. 3：
The present embodiment is preferred, adds the process of the physical layer process flow process of band spectrum modulation and includes：
The emergent broadcast data flow that upper strata edits is processed according to CMMB channel code and interleaving forms, is encoded
Output bit afterwards；
Output bit after coding carries 4 coding output bits per 18 senary symbols by band spectrum modulation, until
One complete emergent broadcast message of transmission；
Each senary symbol is mapped, output code flow is obtained, according to OFDM patterns data subcarrier is added to
Position；
Subsequent physical-layer handling process is entered according to the CMMB flow processs of scrambling, OFDM modulation, framing, molding filtration and up-conversion
Row is processed, and the radiofrequency signal of generation is sent by connecting station system.Specific band spectrum modulation mode has been selected in this programme
Emergent broadcast message is processed, relatively conventional spread spectrum mode, it is not necessary to the serial generator of spread spectrum, more conducively hardware reality
It is existing.
Wherein, chnnel coding includes RS codings and LDPC codings, and interleaving format includes that RS encoded bytes interweave and LDPC
Coded-bit intertexture etc..
Specifically, emergent broadcast message physical layer process flow process retains CMMB forms, except for the difference that with band spectrum modulation and phase
BPSK constellation mappings are replaced in the symbol mapping answered, and specifically carry out band spectrum modulation according to table 1 below correspondence form, the symbol after being expanded
Number：
Table 1:Escape character table
Then the symbol after extension is mapped, concrete mapping mode is carried out according to table 2 below：
Table 2：Mapping mode table
| Output sequence form | Mapping symbols |
| 0 | ej0 |
| 1 | ej2π/3 |
| 2 | e-j2π/3 |
| 3 | ejπ |
| 4 | ejπ/3 |
| 5 | e-jπ/3 |
The present embodiment is preferred, and emergent broadcast data load is divided into the step of the data segment of 2^10 (1024) byte length
In rapid：
Division is not made less than the emergent broadcast message of 1024 bytes for length to process.
The present embodiment is preferred, and emergent broadcast data load is divided into the step of the data segment of 2^10 (1024) byte length
Before rapid：
First emergent broadcast data load is segmented, it is of short duration to be stored in emergent broadcast data in units of byte, each
The length range of emergent broadcast data segment is 2^13 (8192) byte.
The present embodiment is preferred, and it is that emergent broadcast data is carried according to national regulation and Xu Ang pipe standards that front end is broadcasted in broadcast
Lotus enters edlin.
Fig. 5 is a kind of schematic diagram based on the improved emergent message broadcasting system of CMMB system of the present invention, the reality shown in Fig. 3
Applying the system of example includes：
Edit cell 10, for broadcast front-end edit emergent broadcast data load is broadcasted；
Division unit 20, for emergent broadcast data load to be divided into the emergent broadcast number of 2^10 (1024) byte length
According to section；
Copied cells 30, for emergent broadcast data segment to be replicated, obtains two emergent broadcast information of identical；
Encapsulation unit 40, for being packaged according to CMMB emergent broadcast tableau formats to two emergent broadcast message；
Adjustment converter unit 50, to broadcast message of meeting an urgent need the physical layer process flow process of band spectrum modulation, Ran Houjing are added
Up-conversion sends.
Using above-mentioned technical proposal, the present invention can at least obtain following technique effects：
First, the present invention has selected specific band spectrum modulation mode to process emergent broadcast, it is ensured that user terminal
Disaster field etc. blocked or other adverse circumstances under, still be able to farthest be properly received emergent notice；
Meanwhile, the present invention has carried out the division of data segment to emergent broadcast data load in advance, and this further reduction is used
Family terminal disaster field etc. blocked or other adverse circumstances under, meet an urgent need message losing probability, provide for disaster field
Effectively communication is supported.
The present embodiment is preferred, has used arbitrary disclosed emergent message broadcasting method of the invention.This programme is effectively compatible
Existing CMMB standards terminal, and there is provided a kind of anti-interference emergent broadcast communication scheme with good autgmentability.
It should be noted that the various embodiments of the disclosure as above are generally related to a certain extent input data
Process and output data generation.This input data is processed and output data generation can be in hardware or soft with combination of hardware
Realize in part.For example, can in mobile device or similar or related circuit using specific electronic components for realize with
The function that as mentioned above the various embodiments of the disclosure are associated.Alternatively, according to that instructs to operate for being stored or more
Multiple processors are capable of achieving the function of associating with the various embodiments of the disclosure as described above.If it is, then these instructions
Can be stored on one or more non-transitory processor readable mediums, this is in the scope of the present disclosure.Processor can
Reading the example of medium includes read only memory (ROM), random access memory (RAM), CD-ROM, tape, floppy disk and optics number
According to storage device.In addition, functional computer program, instruction and the instruction segment for realizing the disclosure can be by disclosure art
Programmer easily explain.
Although illustrating and describing the disclosure with reference to the various embodiments of the disclosure, those skilled in the art will manage
Solution, in the case of without departing from the spirit and scope of the present disclosure being defined by the appended claims and the equivalents thereof, can enter to it
Various changes in row form and details.
Claims (10)
1. it is a kind of to be based on the improved emergency information broadcasting method of CMMB system, it is characterised in that including step：
Front-end edit emergent broadcast data load is broadcasted in broadcast；
Emergent broadcast data load is divided into into the emergent broadcast data segment of 2^10 (1024) byte length；
Emergent broadcast data segment is replicated, two emergent broadcast information of identical are obtained；
Two emergent broadcast message are packaged according to CMMB emergent broadcast tableau formats；
The physical layer process flow process of band spectrum modulation is added to broadcast message of meeting an urgent need, then Jing up-conversions send.
2. method as claimed in claim 1, it is characterised in that the two emergent broadcast message is according to CMMB emergent broadcast tables
In the step of form is packaged：
Two emergent broadcast information are respectively mounted CMMB emergent broadcast tableau formats and are packaged, and multiplexed frame is arranged in after the completion of encapsulation
The position of the corresponding first control information table of form and the second control information table.
3. method as claimed in claim 2, it is characterised in that be added the thing of band spectrum modulation in described pair of emergent broadcast message
Reason layer handling process, the step of then Jing up-conversions send in：
The physical layer process flow process of band spectrum modulation is added to the emergent broadcast information in the second control information table, then on Jing
Frequency conversion sends；
And, the emergent broadcast information in the first control information table is then issued according to CMMB standards.
4. method as claimed in claim 2, it is characterised in that the formation of the emergent broadcast data segment includes process：
The emergent broadcast message table of identical content is made a distinction with table identification number, using the emergent broadcast table table mark of band spectrum modulation
Knowledge number is set to 0x11, and the emergent broadcast table table identification number of original CMMB reference formats is still 0x10；
Present segment sequence number and most back segment sequence number deposit respectively the data message sequence number after being segmented, from the beginning of 0；
The emergent broadcast data segment of regular length is stored in into corresponding data segment location, and shows reality with 13 data lengths
The length of emergent broadcast data segment；
First is constituted by the emergent broadcast gauge outfit of set form, emergent broadcast data segment 0x10 and cyclic redundancy check (CRC) (CRC_32)
Control information table, meanwhile, by the emergent broadcast gauge outfit of set form, emergent broadcast data segment 0x11 and cyclic redundancy check (CRC)
(CRC_32) the second control information table is constituted.
5. method as claimed in claim 3, it is characterised in that the process bag of the physical layer process flow process of the addition band spectrum modulation
Include：
The emergent broadcast data flow that upper strata edits is processed according to CMMB channel code and interleaving forms, after being encoded
Output bit；
Output bit after coding carries 4 coding output bits per 18 senary symbols, until transmission by band spectrum modulation
One complete emergent broadcast message；
Each senary symbol is mapped, output code flow is obtained, according to OFDM patterns the position of data subcarrier is added to；
At CMMB flow processs of the subsequent physical-layer handling process according to scrambling, OFDM modulation, framing, molding filtration and up-conversion
Reason, the radiofrequency signal of generation is sent by connecting station system.
6. method as claimed in claim 1, it is characterised in that described that emergent broadcast data load is divided into into 2^10 (1024) word
In the step of data segment of section length：
Division is not made less than the emergent broadcast message of 1024 bytes for length to process.
7. method as claimed in claim 1, it is characterised in that described that emergent broadcast data load is divided into into 2^10 (1024) word
Before the step of data segment of section length：
First emergent broadcast data load is segmented, it is of short duration to be stored in emergent broadcast data in units of byte, each is met an urgent need
The length range of broadcast data section is 2^13 (8192) byte.
8. method as claimed in claim 1, it is characterised in that front end is broadcasted in the broadcast is marked according to national regulation and Xu Angguan
It is accurate that edlin is entered to emergent broadcast data load.
9. it is a kind of to be based on the improved emergent message broadcasting system of CMMB system, it is characterised in that to include：
Edit cell, for broadcast front-end edit emergent broadcast data load is broadcasted；
Division unit, for emergent broadcast data load to be divided into the emergent broadcast data segment of 2^10 (1024) byte length；
Copied cells, for emergent broadcast data segment to be replicated, obtains two emergent broadcast information of identical；
Encapsulation unit, for being packaged according to CMMB emergent broadcast tableau formats to two emergent broadcast message；
Adjustment converter unit, is added the physical layer process flow process of band spectrum modulation, then Jing up-conversions to broadcast message of meeting an urgent need
Send.
10. as claimed in claim 9 emergent message broadcasting system, it is characterised in that used as described in claim 2-8
Emergent message broadcasting method.
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| CN114449456A (en) * | 2021-12-23 | 2022-05-06 | 福建新大陆通信科技股份有限公司 | Emergency frequency modulation broadcast instruction receiving method |
| CN114449456B (en) * | 2021-12-23 | 2023-05-30 | 福建新大陆通信科技股份有限公司 | Emergency frequency modulation broadcast instruction receiving method |
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| CN106604239B (en) | 2020-12-04 |
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