CN101959069B - Method for transmitting and acquiring service information by using multiplex frame - Google Patents
Method for transmitting and acquiring service information by using multiplex frame Download PDFInfo
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- CN101959069B CN101959069B CN 200910108822 CN200910108822A CN101959069B CN 101959069 B CN101959069 B CN 101959069B CN 200910108822 CN200910108822 CN 200910108822 CN 200910108822 A CN200910108822 A CN 200910108822A CN 101959069 B CN101959069 B CN 101959069B
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Abstract
The invention discloses a method for transmitting and acquiring service information by using a multiplex frame. The method for transmitting the service information by using the multiplex frame comprises the following steps of: setting a multiplex frame identifier in a multiplex frame head; and judging whether the information to be transmitted by a time slot 0 in the second is control information, if so, filling a control information list in a multiplex frame 0 corresponding to the time slot 0 and setting the multiplex frame identifier as 0, otherwise filling service data in the multiplex frame 0 and setting the multiplex frame identifier as a non-0 value. The method has the advantages of transmitting the service data through a multiplex time slot 0 control channel according to low variable frequency of the control information in a CMMB system, improving the resource utilization rate of the time slot 0 control channel and saving service logic channel resources, along with simpleness and practicability.
Description
Technical field
The present invention relates to China Mobile multimedia broadcasting (CMMB) field, relate in particular to the multiplex layer technology at CMMB system and terminal.
Background technology
CMMB broadcast channel physical layer was 1 frame in per 1 second, was divided into 40 time slots, and the length of each time slot is 25ms.Physical layer is that upper-layer service provides broadcast channel through the physical layer logic channel, and the physical layer logic channel is divided into control logic channel and service logical channels.The control logic channel is used to carry the broadcast system control information, and service logical channels is used to carry broadcast service data information.Physical layer has only a fixing control logic channel, takies the time slot 0 of system, and service logical channels takies the time slot 1～39 of system, sees shown in Figure 1.
In service logical channels, transmit service data information such as video, audio frequency, electron service instruction, user management, data broadcasting, take 1～39 business time-slot and transmit.With the QPSK modulation system is example, and existing single program channel audio, video data needs 4 time slots to transmit, and along with the increase and professional the becoming increasingly abundant of novel broadcast data of broadcast TV channel, the business time-slot channel resource can growing tension.
Summary of the invention
Technical problem to be solved by this invention is to overcome the nervous problem of business time-slot resource.
For solving the problems of the technologies described above, the present invention has proposed a kind of method of utilizing multiplexed frame transport service information according to the low-down characteristics of control information change frequency in the CMMB system, comprising:
Further, also comprise: compare with the control information in last second, judge whether control information changes, if, the renewal sequence number in the multiplexed frame frame head is added 1, fill the related content of multiplexed frame frame head, otherwise, the related content of filling multiplexed frame frame head.
Further, also comprise: the upset sign is set, and said upset sign is used for controlling time slot 0 alternately communicating control information and business datum;
Said step 2 is the value according to said upset sign, and whether what judge that time slot 0 will transmit in this second is the control information table;
If the value of said upset sign is 0, what time slot 0 will transmit in this second is the control information table;
Otherwise what time slot 0 will transmit in this second is business datum;
Said method also comprises: with the negate of said upset sign.
In addition, the invention allows for a kind of method of obtaining business information, comprising:
The terminal receives the data of first time slot 0, if the renewal sequence number of the renewal sequence number of first multiplexed frame 0 of said first time slot, 0 correspondence and terminal preservation is inequality, whether what judge 0 transmission of said first multiplexed frame is control information;
If then resolve said first multiplexed frame 0 and obtain new control information table;
Be not, the terminal receives the data of second time slot 0, resolves said second time slot, the 0 second corresponding multiplexed frame 0 and obtains new control information table.
Further, also comprise: said new control information table is replaced the old control information table of terminal storage, said new renewal sequence number is replaced the old renewal sequence number of terminal storage.
Further, be one second the blanking time of said first time slot 0 and second time slot 0 at least.
Further, also comprise: in the multiplexed frame frame head, judge the multiplexed frame sign;
Whether equaling 0 through the multiplexed frame sign of judging said multiplexed frame 0, whether what judge that said multiplexed frame 0 transmits be control information;
If the multiplexed frame sign equals 0, what multiplexed frame transmitted is control information;
If the multiplexed frame sign is not equal to 0, what multiplexed frame transmitted is not control information.
Further, also comprise:
The user has selected a business according to said new control information table;
The terminal is according to said new control information table, and what know that said business takies is time slot 0, judges whether the multiplexed frame sign of said multiplexed frame 0 equals 0;
Be to abandon said multiplexed frame 0;
Not to resolve said multiplexed frame 0 and obtain business datum.
In addition, the invention allows for a kind of multiplexed frame module, comprising: multiplexed frame 1 is to N, and N is less than or equal to 39 integer, and said multiplexed frame 1 to N is used for the storage service data; Multiplexed frame 0 is used to store control information table or business datum.
Further, said multiplexed frame 0 also comprises: multiplexed frame sign, what be used to identify 0 li storage of multiplexed frame is control information or business datum.
Compared with prior art, the present invention proposes multiplexing 0 time slot control channel and comes transmit traffic data, and provided a kind of multiplexing method according to the low-down characteristics of control information change frequency in the CMMB system.Adopt this method can improve the resource utilization of 0 time slot control channel, saved the service logical channels resource, this method is simple and easy to realize, is particularly suitable for transmitting the business datum that data volume is little, real-time is less demanding.
Description of drawings
Fig. 1 is the sketch map that time slot 0 is monopolized in the prior art control information;
Fig. 2 is that control information of the present invention and business datum alternately take time slot 0 sketch map;
Fig. 3 is the flow chart that CMMB of the present invention system utilizes multiplexed frame 0 transport service information;
Fig. 4 is the flow chart of terminal to acquire service control information of the present invention;
Fig. 5 is the flow chart that terminal of the present invention receives business datum;
Fig. 6 is the processing module figure of CMMB of the present invention system.
Embodiment
Comprise at time slot 0 system for transmitting control information table: network information table, continue/short-period service duplexing configuration list, continue/short time service allocation table, the basic description list of ESG, encryption authorization table.Wherein, network information table provides the corresponding network configuration; Continue business/short-period service duplexing configuration list, write down each the lasting business/short-period service duplexing frame information configured in the certain hour; Continue business/short time service allocation table, write down the correspondence relationship information between lasting business/short time service and the carrier frequency; The basic description list of ESG, in order to the data of description piece in information such as professional distribution condition of ESG and update modes; The encryption authorization description list is in order to describe the encryption authorization system information.In addition, the subsidiary renewal sequence number that above-mentioned each control information table is arranged of the frame head of each multiplexed frame, when changing appearred in the information of control information table, upgrading sequence number needed to change, and each the renewal adds 1.The effect of these control information tables provides to information such as network/business configuration in the current system in terminal, is convenient to starting terminal or service switchover.
These control information tables can not upgrade for a long time, and change frequency is very low, so, in the quite a long time, all the identical repeated control information of broadcasting in the time slot 0.The terminal is generally preserved each control information table and is upgraded sequence number in portion's memory within it; When startup or service switchover; After the terminal gets access to the multiplexed frame 0 of time slot 0 correspondence; The renewal sequence number of multiplexed frame 0 and the renewal sequence number of terminal storage are compared, only just can not obtain new control information table simultaneously in the renewal sequence number.So the utilance of time slot 0 channel transmission information is very low, this has brought waste for nervous channel resource.
Very low based on the control information change frequency; Thereby cause the low characteristics of time slot 0 channel resource utilance; The present invention proposes to carry out the multiplexing thought that transmits the business datum that data volume is little, real-time is less demanding through the time slot 0 to each second; Multiplexing method adopts control information and service data information alternately to take time slot 0; I.e. time slot 0 transmit traffic data of the time slot 0 communicating control information table of time slot 0 transmit traffic data of the time slot 0 communicating control information table of n second, n+1 second, n+2 second, n+3 second ..., see shown in Figure 2.Adopt this method can save 1 time slot (25ms) in per 2 seconds and come transmit traffic data, so both improved time slot 0 utilization rate of channel resources, also saved the business time-slot channel resource that is used for transmitting this business datum specially.
The present invention's CMMB system end before this utilizes multiplexed frame 0 transport service information; Make multiplexed frame 0 have the function of service data transmission; The CMMB terminal is according to the sign in the multiplexed frame 0 then; Receive the control information table or the business datum that transmit in the multiplexed frame 0, in embodiment one and two, utilize the method for multiplexed frame 0 transport service information and the method for CMMB terminal reception to describe respectively below the CMMB system:
Embodiment one
The CMMB system utilizes multiplexed frame 0 transport service information, and is as shown in Figure 3, comprising:
The first step is provided with the upset sign, and multiplexed frame sign (MF_ID) is set;
Said upset sign is used for controlling time slot 0 alternately communicating control information and business datum, if regulation: upset is designated at 0 o'clock; Time slot 0 communicating control information, upset is designated at 1 o'clock, time slot 0 transmit traffic data; Perhaps upset is designated at 1 o'clock, time slot 0 communicating control information, and upset is designated at 0 o'clock; Time slot 0 transmit traffic data, this example adopt upset to be designated, time slot 0 communicating control information at 0 o'clock.
What can judge promptly that time slot 0 transmits in this second according to upset sign is control information or business datum.
For what distinguish multiplexed frame 0 carrying is control information or business datum, utilizes multiplexed frame sign (MF_ID) value of frame head to distinguish, if control information, MF_ID is set to 0, if business datum, MF_ID is set to non-0 value, as 1.
In second step, judge whether the upset sign is 0, is, the control information table is filled in the multiplexed frame 0, and it is 0 that MF_ID is set; Otherwise, business datum is filled in the multiplexed frame 0, it is 1 that MF_ID is set;
The 3rd step, judge whether network and professional control information change, and are, the renewal sequence number of control information corresponding table is added 1, fill other content in the frame head, otherwise, other content in the filling frame head;
The frame head of said multiplexed frame also comprises the length of existing multiplexed frame initial code, multiplexed frame length, multiplex sub frame number, each multiplexed sub frame except the renewal sequence number that comprises MF_ID and control information table;
The 4th step, the sign of will overturning negate.
Its effect is to make control information and business datum alternately take time slot 0.
Embodiment two
The CMMB terminal realizes that this multiplexing method comprises: obtain professional control information during startup/service switchover and receive business datum two parts flow process.The workflow of these two parts is different with existing procedure; The main difference point that obtains professional control information workflow is: after time slot 0 obtains multiplexed frame 0; What need the judgement carrying is control information or business datum; If business datum need be deferred to the control information after next second obtained renewal.The difference that receives the business datum workflow is: need to judge that this business datum takies time slot 0 and transmits or take time slot 1～39 transmission.
Doing one with regard to this two parts flow process respectively below specifies:
The workflow of the up-to-date control information of CMMB terminal to acquire service is seen Fig. 4, and key step is following:
The first step, receiving slot 0 data are obtained complete multiplexed frame 0, resolve the renewal sequence number that obtains control information table in the frame head;
In second step, whether the renewal sequence number of more said renewal sequence number and terminal storage is identical, is, then from the control information table of terminal storage, obtains relevant control information; Otherwise, carried out for the 3rd step.
The 3rd step, if the renewal sequence number is inequality or renewal sequence number and control information table are not preserved in the terminal, judge then whether the MF_ID in the frame head equals 0, be to carry out for the 4th step; Otherwise, carry out the first step.
MF_ID equals 0, and what represent that multiplexed frame in this second 0 transmits is control information; MF_ID is not equal to 0, and what represent that multiplexed frame in this second 0 transmits is business datum, receives the multiplexed frame 0 of next second again.
The 4th step, resolve multiplexed frame 0 and obtain up-to-date control information table, new control information table and new renewal sequence number are replaced the control information table of preserving at the terminal and upgraded sequence number, from new control information table, obtain the control information of being correlated with.
The CMMB terminal receives the workflow of business datum and sees Fig. 5, and key step is following:
The first step, the user has selected a business according to said new control information table;
In second step, the terminal is according to said new control information table, and whether what judge that said business takies is time slot 0, is not that this business takies several in the time slot 1～39, then turns to these time slots to receive business datum, carries out for the 4th step; Be, on time slot 0, receive multiplexed frame 0, carried out for the 3rd step;
Lasting business/short-period service duplexing configuration list in the said control information table has write down the professional gap information that takies.
In the 3rd step, judge whether the MF_ID in the multiplexed frame 0 equals 0;
Be not, what expression multiplexed frame 0 carried is business datum, resolves and obtains business datum;
Be that what expression multiplexed frame 0 carried is control information, abandons;
The 4th step, judge that business datum receives whether to end or accomplish, be, stop reception, not to receive the data of next second slot transmission.
Multiplexing method among the present invention can be expanded, at n time slot 0 communicating control information of second, n+1 ..., n+m second (m >=1) time slot 0 transmit traffic data; At n+m+1 time slot 0 communicating control information of second ..., can save more time slot 0 like this and be used for transmit traffic data, but when the terminal is inserted CMMB network or control information first renewal is taken place; The time of starting terminal/service switchover may increase m second; When the m value is big, can let the user feel that the speed of startup/service switchover is slow, have influence on end-user experience; So among the present invention in the multiplexing method m be set to minimum value 1; Like this, the time of starting terminal/service switchover may only increase by 1 second, when improving time slot 0 channel resource utilance, does not influence the initiation of services at terminal and the performance of switching basically.
So the present invention can transmit emerging data broadcast service through multiplexing 0 time slot, like the weather forecast business datum.The weather forecast business datum is different from the television channel audio, video data, and its data volume is little, and real-time is less demanding, if distribute a business time-slot to be used for transmitting separately, relatively wastes the business time-slot channel resource.Can transmit through multiplexing time slot 0, save the business time-slot channel resource.
Embodiment three
The present invention uses the multiplexed frame module in embodiment one CMMB system utilizes the method for multiplexed frame 0 transport service information; The invention allows for a kind of multiplexed frame module; Comprise: multiplexed frame 1 is to N, and N is less than or equal to 39 integer, and said multiplexed frame 1 to N is used for the storage service data; Said multiplexed frame module also comprises: multiplexed frame 0 is used to store control information table or business datum.
Said multiplexed frame 0 also comprises: multiplexed frame sign, what be used to identify 0 li storage of multiplexed frame is control information or business datum.
Said multiplexed frame module is seen shown in Figure 6; Comprise physical layer process module and multiplex layer processing module; Wherein, The physical layer process module is followed related physical layer protocol standard fully and is realized, the multiplex layer processing module comprises multiplexed frame 0 and multiplexed frame 1～N again, and the method for multiplexed frame 1～N transmit traffic data is followed the multiplex layer consensus standard of related service fully and realized.The method of multiplexed frame 0 transmit traffic data is different with existing method; Its main difference point is that control information and business datum need alternately be filled in the subframe of multiplexed frame 0, and judges that through multiplexed frame sign (MF_ID) what carry in this frame is control information or business datum.In addition, what no matter multiplexed frame 0 carried is control information or business datum, and the frame head of multiplexed frame all need be provided with the renewal sequence number of control information table.
Range of application of the present invention includes but are not limited to the foregoing description, for the less demanding business of real-time, for example: data services such as emerging e-magazine, Financial Information, under the situation of business time-slot resource anxiety, all can consider to adopt.
Claims (8)
1. a method of utilizing multiplexed frame transport service information is characterized in that, comprising:
Step 1, multiplexed frame sign is set in the multiplexed frame frame head;
Step 2, whether what judge that time slot 0 will transmit in this second according to the upset sign that is provided with is control information; If; The control information table is filled in the multiplexed frame 0 of time slot 0 correspondence, the multiplexed frame sign is set to 0, otherwise; Business datum is filled in the said multiplexed frame 0, and the multiplexed frame sign is set to non-0 value.
2. utilize the method for multiplexed frame transport service information according to claim 1, it is characterized in that, also comprise:
Compare with the control information in last second, judge whether control information changes, if, the renewal sequence number in the multiplexed frame frame head is added 1, fill the related content of multiplexed frame frame head, otherwise, the related content of filling multiplexed frame frame head.
3. like the said method of utilizing multiplexed frame transport service information of claim 2, it is characterized in that in the said step 2, according to the value of said upset sign, whether what judge that time slot 0 will transmit in this second is that the control information table specifically comprises:
Whether the value of judging said upset sign is 0;
If the value of said upset sign is 0, what time slot 0 will transmit in this second is the control information table;
Otherwise what time slot 0 will transmit in this second is business datum;
Said method also comprises: with the negate of said upset sign.
4. a method of obtaining business information is characterized in that, comprising:
The terminal receives the data of first time slot 0; If the renewal sequence number of first multiplexed frame 0 that said first time slot 0 is corresponding is inequality with the renewal sequence number that preserve at the terminal, whether what judge 0 transmission of said first multiplexed frame according to the multiplexed frame sign of first multiplexed frame 0 is control information;
If then resolve said first multiplexed frame 0 and obtain new control information table;
Be not, the terminal receives the data of second time slot 0, resolves said second time slot, the 0 second corresponding multiplexed frame 0 and obtains new control information table.
5. like the said method of obtaining business information of claim 4, it is characterized in that, also comprise: said new control information table is replaced the old control information table of terminal storage, said new renewal sequence number is replaced the old renewal sequence number of terminal storage.
6. like the said method of obtaining business information of claim 4, it is characterized in that be one second the blanking time of said first time slot 0 and second time slot 0 at least.
7. like the said method of obtaining business information of claim 4; It is characterized in that whether what said multiplexed frame sign according to first multiplexed frame 0 was judged 0 transmission of said first multiplexed frame is that control information specifically comprises: judge in the multiplexed frame frame head whether the multiplexed frame sign equals 0;
If the multiplexed frame sign equals 0, what multiplexed frame transmitted is control information;
If the multiplexed frame sign is not equal to 0, what multiplexed frame transmitted is not control information.
8. like the said method of obtaining business information of claim 7, it is characterized in that, also comprise:
The user has selected a business according to said new control information table;
The terminal is according to said new control information table, and what know that said business takies is time slot 0, judges whether the multiplexed frame sign of said multiplexed frame 0 equals 0;
Be to abandon said multiplexed frame 0;
Not to resolve said multiplexed frame 0 and obtain business datum.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102523478A (en) * | 2011-12-14 | 2012-06-27 | 展讯通信（上海）有限公司 | Method and device for testing digital television terminal |
| CN108988977B (en) * | 2017-05-31 | 2021-06-08 | 中兴通讯股份有限公司 | Method, device and system for transmitting service flow in flexible Ethernet protocol |
| WO2019024039A1 (en) * | 2017-08-03 | 2019-02-07 | 北京小米移动软件有限公司 | Method and device for indicating multi-service data multiplex transmission, terminal, and base station |
| CN110248419B (en) * | 2018-10-23 | 2022-08-09 | 浙江芯昇电子技术有限公司 | Method and device for interrupting communication service |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2000069147A1 (en) * | 1999-05-10 | 2000-11-16 | Samsung Electronics Co., Ltd. | Apparatus and method for exchanging variable-length data according to radio link protocol in mobile communication system |
| CN101325684A (en) * | 2007-06-14 | 2008-12-17 | 中兴通讯股份有限公司 | Method and system for transmitting ciphering control message based on mobile multimedia broadcast |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000069147A1 (en) * | 1999-05-10 | 2000-11-16 | Samsung Electronics Co., Ltd. | Apparatus and method for exchanging variable-length data according to radio link protocol in mobile communication system |
| CN101325684A (en) * | 2007-06-14 | 2008-12-17 | 中兴通讯股份有限公司 | Method and system for transmitting ciphering control message based on mobile multimedia broadcast |
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Application publication date: 20110126 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Method for transmitting and acquiring service information by using multiplex frame Granted publication date: 20121219 License type: Common License Record date: 20151123 |
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