CN101047681A - Method for transmitting broadcast service information - Google Patents
Method for transmitting broadcast service information Download PDFInfo
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- CN101047681A CN101047681A CNA2006100709742A CN200610070974A CN101047681A CN 101047681 A CN101047681 A CN 101047681A CN A2006100709742 A CNA2006100709742 A CN A2006100709742A CN 200610070974 A CN200610070974 A CN 200610070974A CN 101047681 A CN101047681 A CN 101047681A
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Abstract
This invention discloses a transmission method for broadcast service information, which divides a system resource into an at least one bandwidth based on the resource needed by a program flow transmitted currently, assigns time segment for the program flow with the same loading frequency in a set time length occupied when transmitting program flows to multiplex program flows on the related bandwidth and transmitting them based on the multiplex control information of the time segment of bandwidth and set time length, namely program flows are transmitted on the bandwidth with loading frequency and time segment corresponding to the program flow.
Description
Technical field
The present invention relates to the multicast and broadcast technology, be meant a kind of transmission method of broadcast service information especially.
Background technology
At OFDM (OFDM, Orthogonal Frequency Division Multiplex) realizes multicast (MBMS on the multi-transceiver technology, Multimedia Broadcast Multicast Service) is one of business important in Long Term Evolution (LTE, the Long Time Evolution) project.Current, people no longer are satisfied with phone and information series business to the demand of mobile communication, fast development along with internet (Internet), a large amount of mobile multi-media services continue to bring out out, the some of them mobile multi-media service requires a plurality of users can receive identical data, for example video request program, television broadcasting, video conference, online education, interactive game etc. simultaneously.MBMS just is meant that a plurality of recipients of system in system send a kind of business of same multi-medium data.These mobile multi-media services are compared with general data service, have characteristics such as data volume is big, longer duration, delay sensitive.Present multi-medium data mainly is some stream business or backstage (Background) business.
In order to make full use of asymmetric frequency spectrum resource, a kind of system schema of independent descending broadcast/group broadcast is subjected to the welcome of some operators.The characteristics of this independent descending broadcast/group broadcast system are to have only down channel, do not have up channel, this scheme can make full use of asymmetric frequency spectrum resource on the one hand, system's construction scheme is significantly reduced, and broadcasting/packet service flexibly can be provided.
In broadcasting/packet service, be divided into two kinds of dynamic broadcast and static broadcasting.Wherein, static broadcasting is the bearer path of the pre-configured broadcasting service of operator, and no matter whether there is MBMS user receiving in the sub-district, as multimedia video stream; Whether dynamic broadcast is according to having the user to monitor in the sub-district, dynamically setting up or remove the bearer path of broadcasting service, as weather forecast, stock information.
In existing television broadcasting, system is provided with certain bandwidth according to whole bandwidth for each program stream, and with transmission respective program stream on corresponding band, the shared bandwidth of each program stream can be inequality, in case but system just can't change after setting bandwidth for each program stream, as shown in Figure 1.The user can watch different programs in different frequency ranges, can switch between different channels, selects to like the program of watching.Since the occupied bandwidth of program stream be fix and do not have a reserved resource, system can't dynamically adjust the shared bandwidth of program stream according to the size of traffic carrying capacity, therefore can't effectively utilize frequency spectrum resource flexibly; And, if the whole bandwidth of system is all taken by one or more program streams, need carry out dynamic broadcast, also no longer include resource and used for dynamic broadcast even have the user to monitor in the system this moment.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of transmission method of broadcast service information, effectively utilize frequency spectrum resource flexibly.
In order to achieve the above object, the invention provides a kind of transmission method of broadcast service information, the method includes the steps of:
A, system are divided at least one bandwidth according at least one program stream resource requirement situation of current transmission with system resource, the time period when distributing the transmission program stream for the identical program stream of carrying frequency in the shared setting-up time length;
B, program stream are comprising on the bandwidth of carrying frequency, are transmitting on the corresponding time period with this program stream.
Further comprise step C after the described step B: when program stream transmitted, system was according to the program stream resource requirement situation of current needs transmission, and the time period of the setting-up time length of described bandwidth and/or transmission program stream is adjusted.
Further comprise after the described step C: system issues the time period of the setting-up time length of adjusted bandwidth and/or transmission program stream to UE.
Further comprise before the described steps A: system's bandwidth reserved is as reserving transfer resource.
Further comprise after the described step B: when program stream transmitted, system adjusted bandwidth reserved according to the program stream resource requirement situation of current needs transmission.
Described reserved resource is used for transmission: dynamic broadcast, or the business datum in the static broadcasting, or multicast information.
This method further comprises step a: system issues the frequency range of transmission respective program stream and the time period in time span to user equipment (UE).
Further comprise after the described step a: after UE determines program stream that needs receive, according to the frequency range of transmission respective program stream and the time period in time span, on the bandwidth of corresponding band, program receiving flows on time period of corresponding time span.
The reception bandwidth of described UE is not less than the minimum value of bandwidth described in the steps A.
Described frequency range is the terminal of frequency.
Time period in the described time span is: at least one subframe in frame, or at least one the orthogonal frequency division multiplex OFDM symbol in subframe.
According to the proposed method, system is according at least one program stream resource requirement situation of current transmission, system resource is divided at least one bandwidth, time period when distributing the transmission program stream in the shared setting-up time length for the identical program stream of carrying frequency, transmit in respective bandwidth program stream is multiplexing according to the multiplexing control information that comprises the time period in bandwidth, the setting-up time length at least, promptly program stream is comprising on the bandwidth of carrying frequency, is transmitting on the corresponding time period with this program stream.Because bandwidth resources are to distribute according to the program stream resource requirement situation of current transmission, therefore, can realize the dynamic adjustment to frequency spectrum resource, can effectively utilize frequency spectrum resource flexibly.
In addition, in the transmission course of program stream, system can be according to the current real-time condition that needs the program stream resource requirement of transmission, the time period of the setting-up time length of the bandwidth of transmission program stream and/or transmission program stream is dynamically adjusted, so that the distribution of resource and utilize situation more reasonable.
Description of drawings
Fig. 1 shows existing broadcasting service resource allocation schematic diagram;
Fig. 2 shows broadcasting service resource allocation schematic diagram among the present invention;
Fig. 3 shows broadcasting service resource allocation embodiment one schematic diagram among the present invention;
Fig. 4 shows broadcasting service resource allocation embodiment two schematic diagrames among the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Among the present invention, system is according at least one program stream resource requirement situation of current transmission, system resource is divided at least one bandwidth, time period when distributing the transmission program stream in the shared setting-up time length for the identical program stream of carrying frequency, transmit in respective bandwidth program stream is multiplexing according to the multiplexing control information that comprises the time period in bandwidth, the setting-up time length at least, promptly program stream is comprising on the bandwidth of carrying frequency, is transmitting on the corresponding time period with this program stream.Because bandwidth resources are to distribute according to the program stream resource requirement situation of current transmission, therefore, can realize the dynamic adjustment to frequency spectrum resource, can effectively utilize frequency spectrum resource flexibly.When program stream when being a plurality of, different program streams can identify (MBMS_ID) and distinguish by multicast service.The above program stream is the program in the static broadcasting.Time period in the above time span can be the time terminal, to be described in the time period in the time span, specifically can be the one or more subframes in the frame, also can be the one or more OFDM symbols in the subframe, also can be a subframe and the combination of the combination of an OFDM symbol, a subframe and the combination of a plurality of OFDM symbols, a plurality of subframe and an OFDM symbol or the combination of a plurality of subframe and a plurality of OFDM symbols in the frame.
System issues the frequency range of the transmission respective program stream of program stream, the multiplexing control informations such as time period in time span to subscriber equipment (UE, User Equipment), and this multiplexing control information can further comprise the multicast service sign.Behind the program stream that UE determine to need receives,, then program stream is carried out demodulation and play at program receiving stream on the bandwidth of corresponding band, on time period of corresponding time span.The frequency range of described transmission program stream is the terminal of frequency, and as 5MHz to 10MHz, i.e. the 5MHz bandwidth of 5MHz to 10MHz is to describe the carrying frequency and the bandwidth of transmission program stream.The described time period can be the time terminal, also can be the one or more subframes in the frame, or the one or more OFDM symbols in subframe, also can be a subframe and the combination of the combination of an OFDM symbol, a subframe and the combination of a plurality of OFDM symbols, a plurality of subframe and an OFDM symbol or the combination of a plurality of subframe and a plurality of OFDM symbols in the frame, to be described in the time period of transmission respective program stream in the time span.
UE can watch different programs in different frequency ranges, for example realizes by frequency hopping, and the whole bandwidth of UE should be not less than the minimum bandwidth of system transmissions program stream.The whole bandwidth of UE is big more, and the picture seen of support is many more, and the application layer of UE can be carried out the arrangement of size windows and be watched a plurality of programs simultaneously for the user.UE also can switch between several program pictures, selects to like the program of watching.UE need not the unwanted business datum of demodulation, thus the power consumption of having saved UE.
In a program stream, this program stream is identified by MBMS_ID.A program stream can be divided into a few height streams, for example, audio stream and video flowing, audio stream can be divided into brightness, gray scale, contrast and colourity etc. again, and concrete transformat (TF, Transmission Format) form is formulated by the L2 layer of system, the L2 layer carries out the form encapsulation and adds MBMS_ID, transfer to transmission channel then, enter after the physical layer and can adopt the lower method coding of encoding rate to audio frequency, brightness, gray scale, contrast, other adopt higher coding method.UE is according to multiplexing control information, and the program of selecting the user to subscribe to carries out demodulation, ignores the program data symbol of loseing interest in, do not have subscription, if UE does not have the program of subscription, then UE can be in resting state.
In the transmission course of program stream, system can be according to the current real-time condition that needs the program stream resource requirement of transmission, the bandwidth of transmission program stream and/or time period of setting-up time length of transmission program stream are dynamically adjusted, so that the distribution of resource and utilize situation more reasonable.
The specific implementation process of static broadcasting is as follows: different MBMS enters medium access control (MAC, the Media Access Control) layer of system by logic channel separately; The MAC layer is dispatched the MBMS data, and selects corresponding transformat, by transmission channel to physical layer; The physical layer of system is carried out chnnel coding, symbol-modulated processing according to corresponding transformat, and the height of encoding rate is distinguished to some extent according to the difference of class of business; Physical layer is according to the frequency range of corresponding transmission program stream, the multiplexing control informations such as time period in time span, each MBMS data carried out multiplexing, transmits then.
Because system can dynamically adjust frequency spectrum resource, when needs carry out dynamic broadcast, can come to distribute bandwidth by the bandwidth of adjusting the transmission program stream for dynamic broadcast.In addition, but also bandwidth reserved of system, as the transfer resource of reserving.During system reserved part bandwidth resources, the bandwidth resources of this reservation can be transmitted the partial service data in the static broadcast message, also can transport multicast information, and system can dynamically adjust the size of reserved resource according to service traffics.
The present invention is described in detail below in conjunction with Fig. 2, and current to need the program stream of transmission be 01,02,03,04,11,12,13,21,22,23,24 and 25, and program stream 01,02,03 is identical with 04 carrying frequency, is frequency 0; Program stream 11,12 is identical with 13 carrying frequency, is frequency 1; Program stream 21,22,23,24 is identical with 25 carrying frequency, is frequency 2.Behind the bandwidth reserved H of system, each program stream resource requirement situation according to current transmission, be program stream 01 to 04, program stream 11 to 13, program stream 21 to 25 distributes bandwidth, distributing program stream 01 to 04 shared bandwidth is bandwidth 0, program stream 11 to 13 shared bandwidth are bandwidth 1, program stream 21 to 25 shared bandwidth are bandwidth 2, determine program stream 01 then, 02,03 and 04 uses the time period 01 in the setting-up time length respectively, 02,03 and 04, determine program stream 11,12,13 use the time period 11 in the setting-up time length respectively, 12 and 13, determine program stream 21,22,23,24 and 25 use the time period 21 in the setting-up time length respectively, 22,23,24 and 25.
System issues the frequency range of multicast service sign, transmission respective program stream of each program stream such as bandwidth 1, the time period in time span as multiplexing control informations such as 13 to UE, behind the program stream that UE determines to need to receive, at program receiving stream on the bandwidth of corresponding band, on time period of corresponding time span, then program stream is carried out demodulation and play.For example, UE determines program receiving stream 12, and then UE flows according to multiplexing control information program receiving on the time period 12 of bandwidth 1, setting-up time length, and program stream is carried out demodulation play.
In the transmission course of program stream, system can dynamically adjust the bandwidth of transmission program stream according to the current real-time condition that needs the program stream of transmission, for example transfers bandwidth 1 narrow; Also can transmit the time period of the setting-up time length that changes each program stream, for example transmission changes the time period 02 of the setting-up time length of program stream 02; Also can determine current when having new program stream to transmit simultaneously, redistribute the time period of the setting-up time length of each program stream of transmission on the respective bandwidth, for example need to transmit simultaneously program stream 11,12,13 and 14 on the bandwidth 1, therefore, time period to transmission program stream 11,12 and 13 setting-up time length on the bandwidth 2 is adjusted, and distributes the time period of the setting-up time length of transmitting for program stream 14.
Determining of the time period of the setting-up time length of the distribution of the above transmission program stream bandwidth, transmission program stream, and send instruction by control channel to physical layer and realize the dynamic adjustment of bandwidth and time period is all high-rise.After system dynamically adjusted the time period of bandwidth, the setting-up time length of transmission program stream, after frequency range, the multiplexing control informations such as time period in time span of promptly transmitting respective program stream changes, system needs to issue new multiplexing control information to UE, so that UE can correctly receive programs of interest.
Fig. 3 shows broadcasting service resource allocation embodiment one schematic diagram among the present invention, as shown in Figure 3, system is that the time resource of frequency range of the static broadcast allocation under the independent descending carrier is fixed, in a certain communication environment, the whole communication bandwidth of system is 20MHz, and the minimum of UE reception bandwidth is 5MHz in the sub-district.On each 5MHz communication bandwidth, there are 4 kinds of MBMS streams multiplexing, as shown in Figure 3, instantaneous program stream among the figure on the digitized representation channel of each piece, as 01 is that news program, 02 is that sports cast, 03 is that theatrical evening, 04 is a film etc., and each program stream such as multimedia video stream can comprise many seed flows such as audio frequency, brightness, colourity, gray scale.
For this resource allocation methods, the reception bandwidth is that the UE of 5MHz can select the program stream of one group of 5MHz bandwidth to receive arbitrarily, but also frequency hopping receives to the program stream of other 5MHz bandwidth, and this UE can watch 4 kinds of programs at most simultaneously.The reception bandwidth is that the UE of 10MHz can carry out demodulation to the program stream of 10MHz, can watch 8 kinds of programs simultaneously at most, by that analogy, the reception bandwidth is that the UE of 15MHz can watch 12 kinds of programs at most simultaneously, and the reception bandwidth is that the UE of 20MHz can watch all programs on the transmission bandwidth.Certainly, UE also can select a kind or 2 kinds to like the program of watching to receive, and this is by the application layer decision of UE.System among Fig. 3 has reserved the bandwidth of 5MHz as reserved resource, and this reserved resource can be distributed to static broadcast message and use, and also can distribute to the broadcast message of multicast and use.
Fig. 4 shows broadcasting service resource allocation embodiment two schematic diagrames among the present invention, as shown in Figure 4, system is that the time resource of frequency range of the static broadcast allocation under the independent descending carrier is dynamically to adjust, communication environment among Fig. 3 among the embodiment one is constant, the communication bandwidth of system is 20MHz still, and the minimum of UE reception bandwidth is 5MHz in the sub-district.System dynamically adjusts bandwidth and the time slot that program stream occupies according to the needs of business, program stream is respectively at 2MHz, 3MHz, transmit on the 4MHz bandwidth, receive bandwidth and be the UE of the 5MHz program stream on can any one group of bandwidth of selective reception, can watch 8 kinds of programs simultaneously at most, also can frequency hopping receive favorite program on other bandwidth, reserved resource also can be adjusted according to the resource of static state broadcasting, and in this system, the bandwidth reserved of 10MHz can be used for multicast.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (11)
1, a kind of transmission method of broadcast service information is characterized in that, the method includes the steps of:
A, system are divided at least one bandwidth according at least one program stream resource requirement situation of current transmission with system resource, the time period when distributing the transmission program stream for the identical program stream of carrying frequency in the shared setting-up time length;
B, program stream are comprising on the bandwidth of carrying frequency, are transmitting on the corresponding time period with this program stream.
2, method according to claim 1 is characterized in that, further comprises after the described step B:
C, when program stream transmits, system is according to the program stream resource requirement situation of current needs transmission, and the time period of the setting-up time length of described bandwidth and/or transmission program stream is adjusted.
3, method according to claim 2 is characterized in that, further comprises after the described step C: system issues the time period of the setting-up time length of adjusted bandwidth and/or transmission program stream to UE.
4, method according to claim 1 and 2 is characterized in that, further comprises before the described steps A: system's bandwidth reserved is as reserving transfer resource.
5, method according to claim 4 is characterized in that, further comprises after the described step B: when program stream transmitted, system adjusted bandwidth reserved according to the program stream resource requirement situation of current needs transmission.
6, method according to claim 4 is characterized in that, described reserved resource is used for transmission: dynamic broadcast, or the business datum in the static broadcasting, or multicast information.
7, method according to claim 1 is characterized in that, this method further comprises:
A, system issue the frequency range of transmission respective program stream and the time period in time span to user equipment (UE).
8, method according to claim 7, it is characterized in that, further comprise after the described step a: after UE determines the program stream of needs reception, according to the frequency range of transmission respective program stream and the time period in time span, at program receiving stream on the bandwidth of corresponding band, on time period of corresponding time span.
9, method according to claim 7 is characterized in that, the reception bandwidth of described UE is not less than the minimum value of bandwidth described in the steps A.
10, method according to claim 7 is characterized in that, described frequency range is the terminal of frequency.
11, method according to claim 1, it is characterized in that, time period in the described setting-up time length is: at least one subframe in frame, or at least one the orthogonal frequency division multiplex OFDM symbol in subframe, or at least one subframe in frame and the combination of at least one OFDM symbol.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100709742A CN101047681B (en) | 2006-03-30 | 2006-03-30 | Method for transmitting broadcast service information |
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| CN2006100709742A CN101047681B (en) | 2006-03-30 | 2006-03-30 | Method for transmitting broadcast service information |
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| CN101047681A true CN101047681A (en) | 2007-10-03 |
| CN101047681B CN101047681B (en) | 2012-07-04 |
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| CN2006100709742A Expired - Fee Related CN101047681B (en) | 2006-03-30 | 2006-03-30 | Method for transmitting broadcast service information |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911716A (en) * | 2010-04-14 | 2018-04-13 | 爱立信电视公司 | Adaptation rate for conveying Video service to service group changes |
| CN109314656A (en) * | 2016-06-20 | 2019-02-05 | 日本电信电话株式会社 | Light transmitting device and bandwidth allocation methods |
-
2006
- 2006-03-30 CN CN2006100709742A patent/CN101047681B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911716A (en) * | 2010-04-14 | 2018-04-13 | 爱立信电视公司 | Adaptation rate for conveying Video service to service group changes |
| CN107911716B (en) * | 2010-04-14 | 2020-11-27 | 爱立信电视公司 | System and method for determining encoding rate for digital video information stream |
| CN109314656A (en) * | 2016-06-20 | 2019-02-05 | 日本电信电话株式会社 | Light transmitting device and bandwidth allocation methods |
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| Publication number | Publication date |
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| CN101047681B (en) | 2012-07-04 |
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