CN100578976C - Method for Hierarchical Transmission of Mobile Multimedia Broadcasting Network - Google Patents
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及网络层次结构和信号传输，具体地说，是涉及在移动多媒体广播网络中实现分级传输的方法。The invention relates to network hierarchical structure and signal transmission, in particular to a method for realizing hierarchical transmission in a mobile multimedia broadcasting network.
背景技术Background technique
近年来，数字移动多媒体广播技术和标准发展迅速，在欧洲和美国分别出现了基于不同技术和标准而发展起来的多种数字移动多媒体广播网络，如欧洲的DVB-H(数字视频广播手持式接收：Digital Video BroadcastHandheld)、美国的MediaFLO(媒体单一前向链路：Media Forward LinkOnly)、基于移动蜂窝的BCMCS(广播多播服务：Broadcast and MulticastServices)和BCAST(广播：Broadcast)等，并可为其终端用户提供许多服务内容，如广告、天气预报、新闻、体育节目、综艺、多媒体广播剧、电影等节目，用户可以根据自己的爱好选择移动多媒体广播的服务节目。In recent years, digital mobile multimedia broadcasting technology and standards have developed rapidly. In Europe and the United States, various digital mobile multimedia broadcasting networks developed based on different technologies and standards have emerged, such as DVB-H (Digital Video Broadcasting Handheld Receiver) in Europe. : Digital Video BroadcastHandheld), MediaFLO in the United States (media single forward link: Media Forward LinkOnly), BCMCS (broadcast multicast service: Broadcast and MulticastServices) and BCAST (broadcast: Broadcast) based on mobile cells, etc., and can be used for End users provide many services, such as advertisements, weather forecasts, news, sports programs, variety shows, multimedia radio dramas, movies and other programs, and users can choose mobile multimedia broadcasting service programs according to their own preferences.
不同的服务或节目的覆盖区域有大有小，例如一个频道可以覆盖一个国家、一个省、一个城市甚至是一个城市的部分区域等。传统广播网络一般采用各地区接收到业务数据后在本地进行复用再发送给本地区内的用户终端。The coverage areas of different services or programs vary in size. For example, a channel can cover a country, a province, a city, or even a part of a city. Traditional broadcasting networks generally use service data received by each region to multiplex locally and then send it to user terminals in the region.
如图1所示，即为采用各地区接收到业务数据后在本地进行复用的示意图。具体地说，就是外地节目源通过庞大的广域传送网，将广播信号分别发送给各个地区网络，在各地设置的复用器处完成业务和数据的复用，再通过各地的信号发射站，将此复用信号传送给本地范围内的各用户终端。As shown in FIG. 1 , it is a schematic diagram of local multiplexing after service data is received in each region. Specifically, the program sources in other places send the broadcast signals to the networks in each region through the huge wide-area transmission network, complete the business and data multiplexing at the multiplexers set up in various places, and then pass through the signal transmitting stations in various places, This multiplexed signal is transmitted to each user terminal within the local range.
然而，在图1所示的方式下，实际上整个全国的广播网络是由一个个区域网络组合而成的，而一个业务要想在全国范围内播出，必须要获得每个区域网络运营者的允许，因此没有一个真正意义上的全国性网络，使全国性大范围网络信号传输变得相当困难。However, in the way shown in Figure 1, in fact, the entire national broadcasting network is composed of regional networks, and if a service is to be broadcast nationwide, each regional network operator must obtain Therefore, there is no national network in the true sense, which makes the transmission of nationwide large-scale network signals quite difficult.
因此，在数字移动多媒体广播服务不断发展的今天，如何将整个规模庞大网络进行分层，使各层之间，同层各区域之间的联系更加紧密和方便，实现真正意义上的全国性网络，简化全国性网络信号传输过程，更好地满足全国性广播业务的需求，已经成为亟待解决的问题。Therefore, with the continuous development of digital mobile multimedia broadcasting services, how to layer the entire large-scale network to make the connections between layers and regions on the same layer more closely and conveniently, and realize a truly national network , Simplify the national network signal transmission process, and better meet the needs of the national broadcasting business, has become an urgent problem to be solved.
发明内容Contents of the invention
本发明要解决的技术问题在于提供一种移动多媒体广播网络的分级传输的方法，该方法实现了全国性网络运营和区域性网络运营的有机结合，方便终端用户按照需要方便地接收区域性或全国性节目。The technical problem to be solved by the present invention is to provide a method for hierarchical transmission of mobile multimedia broadcasting network, which realizes the organic combination of national network operation and regional network operation, and facilitates terminal users to conveniently receive regional or national sex show.
为解决上述技术问题，本发明提供一种移动多媒体广播网络的分级传输的方法，其特征在于：将整个移动多媒体广播网络划分成多个级别网络，使得一个上级网络覆盖一个或多个下级网络；其中，各级网络配置不同的基本载频，某个级别网络的基本载频所承载的信息，包括本载频的控制信息、本级网络中其他载频的控制信息，以及本级网络的下级网络的基本载频的描述信息。In order to solve the above-mentioned technical problems, the present invention provides a hierarchical transmission method of a mobile multimedia broadcasting network, which is characterized in that: the entire mobile multimedia broadcasting network is divided into multiple levels of networks, so that one upper-level network covers one or more lower-level networks; Among them, the networks at all levels are configured with different basic carrier frequencies, and the information carried by the basic carrier frequencies of a network at a certain level includes the control information of this carrier frequency, the control information of other carrier frequencies in the network at the same level, and the lower-level information of the network at the same level. Description information of the basic carrier frequency of the network.
其中，为各级网络中的网络都配置独立的复用器与发射机。Among them, independent multiplexers and transmitters are configured for the networks in all levels of networks.
其中，上级网络的业务在本级网络的复用器完成复用后的数据流，经由本级网络发射机直接发送给本级网络覆盖区域内的所有终端，或经由分发网络送到下级网络的发射机上，再经由下级网络发射机发送到该网覆盖区域内的所有终端。Among them, the data flow of the business of the upper-level network after multiplexing in the multiplexer of the current-level network is directly sent to all terminals in the coverage area of the current-level network through the transmitter of the current-level network, or sent to the terminals of the lower-level network through the distribution network Transmitter, and then sent to all terminals in the coverage area of the network via the lower-level network transmitter.
其中，本发明还可以进一步包括：Wherein, the present invention may further include:
终端进入整个移动多媒体广播网络后，判断该终端是仅位于一个上级网络覆盖的区域，还是位于一个上级网络和下级网络共同覆盖的区域；如果仅位于上级网络覆盖区域，则该终端只能接收上级网络的业务，根据基本载频上的控制信息选择希望接收的节目；如果终端位于上级网络和下级网络共同覆盖的区域，则该终端既可以接收上级网络的业务，也可以接收下级网络的业务。After the terminal enters the entire mobile multimedia broadcasting network, it is judged whether the terminal is only located in an area covered by an upper-level network, or in an area covered by both an upper-level network and a lower-level network; if it is only located in an area covered by an upper-level network, the terminal can only receive For network services, select the program you want to receive according to the control information on the basic carrier frequency; if the terminal is located in the area covered by both the upper-level network and the lower-level network, the terminal can receive services from both the upper-level network and the lower-level network.
其中，还可以进一步包括：Among them, it may further include:
如果终端脱离下级网络覆盖区域时，中断当前服务，然后转到上级网络的基本载频，提示用户重新选择。If the terminal leaves the coverage area of the lower-level network, it will interrupt the current service, and then switch to the basic carrier frequency of the upper-level network, prompting the user to choose again.
与现有技术相比，本发明的优点在于：Compared with the prior art, the present invention has the advantages of:
本发明介绍的移动多媒体广播网络的分级传输的方法，将庞大的全国性网络进行分层，解决了网络信号跨区域进行业务传送时必须要获得网络运营者允许的瓶颈问题，实现真正意义上的全国性网络，更好地实现了全国性广播业务，以及全国性网络运营和区域性网络运营的有机结合。The hierarchical transmission method of the mobile multimedia broadcasting network introduced by the present invention layers the huge national network, solves the bottleneck problem that the network operator must obtain the permission of the network operator when the network signal is transmitted across regions, and realizes the true sense of The national network better realizes the national broadcasting business and the organic combination of national network operation and regional network operation.
本发明所要解决的技术问题，技术方案要点及有益效果，将结合实施例，参照附图作进一步的说明。The technical problems to be solved by the present invention, the key points of the technical solutions and the beneficial effects will be further described in conjunction with the embodiments and with reference to the accompanying drawings.
附图说明Description of drawings
图1是传统广播网络示意图；Figure 1 is a schematic diagram of a traditional broadcast network;
图2是分级网络的结构示意图；Fig. 2 is a schematic structural diagram of a hierarchical network;
图3是分级网络的资源分配示意图；FIG. 3 is a schematic diagram of resource allocation in a hierarchical network;
图4是终端所处位置和信号接收结果关系示意图。Fig. 4 is a schematic diagram of the relationship between the location of the terminal and the signal receiving result.
具体实施方式Detailed ways
本发明解决了全国性业务要想在全国范围内播出，必须要获得每个区域网络运营者允许的问题。提供一种应用在移动多媒体广播网络中分级信号传输的方法，能够更好地满足全国性广播业务的需要。The invention solves the problem that the permission of each regional network operator must be obtained if the nationwide service is to be broadcast nationwide. A method for hierarchical signal transmission applied in a mobile multimedia broadcasting network is provided, which can better meet the needs of national broadcasting services.
从整体上说，本发明首先需要组建一个覆盖全国范围的分层网络，即根据覆盖地域的要求，将整个移动多媒体广播系统划分成多级网络结构，使得在地域上，一个上级网络覆盖一个或多个下级网络；同时，为各级网络中的网络都配置独立的复用器与发射机，并为各级网络配置不同的基本载频。On the whole, the present invention first needs to set up a layered network covering the whole country, that is, divide the entire mobile multimedia broadcasting system into a multi-level network structure according to the requirements of the coverage area, so that in the area, a higher-level network covers one or more Multiple lower-level networks; at the same time, configure independent multiplexers and transmitters for the networks at all levels, and configure different basic carrier frequencies for the networks at all levels.
这样，上级网络的业务在本级网络的复用器完成复用后的数据流，就可以经由本级网络发射机直接发送给本级网络覆盖区域内的所有终端，或经由分发网络送到下级网络的发射机上，再经由下级网络发射机发送到该网覆盖区域内的所有终端。In this way, the multiplexed data stream of the business of the upper-level network can be directly sent to all terminals in the coverage area of the current-level network through the transmitter of the current-level network, or sent to the lower-level through the distribution network On the transmitter of the network, it is sent to all terminals in the coverage area of the network through the transmitter of the lower network.
而在接收方面，在接收终端进入整个移动多媒体广播网络后，可以判断该终端是仅位于一个上级网络覆盖的区域，还是位于一个上级网络和下级网络共同覆盖的区域；如果仅位于上级网络覆盖区域，则该终端只能接收上级网络的业务，根据基本载频上的控制信息选择希望接收的节目；如果终端位于上级网络和下级网络共同覆盖的区域，则该终端既可以接收上级网络的业务，也可以接收下级网络的业务。In terms of reception, after the receiving terminal enters the entire mobile multimedia broadcasting network, it can be judged whether the terminal is only located in an area covered by an upper-level network, or in an area covered by both an upper-level network and a lower-level network; , then the terminal can only receive the services of the upper-level network, and select the program it wants to receive according to the control information on the basic carrier frequency; It can also receive services from lower-level networks.
而当接收终端脱离下级网络覆盖区域时，则可以中断当前服务，然后转到上级网络的基本载频，提示用户重新选择。When the receiving terminal leaves the coverage area of the lower-level network, it can interrupt the current service, and then switch to the basic carrier frequency of the upper-level network, prompting the user to select again.
下面，以一个两级网络信号传输的实施例来进一步说明本发明。Next, the present invention will be further described with an embodiment of two-level network signal transmission.
参考图2，可以包括如下步骤：With reference to Figure 2, the following steps may be included:
第一步，网络分层和资源配置。The first step is network layering and resource allocation.
在本实施例当中，根据覆盖地域的要求，将整个移动多媒体广播系统划分成两级网络结构，即整个网络层次分为一个一级网络(网络覆盖区域较大，例如一个国家)和多个二级网络(每个网络覆盖区域较小，例如一个省或一个市或一个更小的区域)；每个网络都有独立的复用器，完成相应的开销信息和业务数据的数据流的复用；二级网络中的各个网络都有地面增补转发器/发射机，其中，一级网络可以使用所有二级网络内的地面增补转发器/发射机，一个二级网络只能使用本二级网络内的地面增补转发器/发射机；各级网络所占用的空中频率资源由全国性运营商负责分配，各级网络的每一个业务/节目所占用的空中资源由本级网络管理者负责分配。In this embodiment, according to the requirements of coverage areas, the entire mobile multimedia broadcasting system is divided into a two-level network structure, that is, the entire network level is divided into a first-level network (with a larger network coverage area, such as a country) and multiple second-level networks. Level network (each network covers a small area, such as a province or a city or a smaller area); each network has an independent multiplexer to complete the multiplexing of the corresponding overhead information and data streams of business data ; Each network in the secondary network has ground supplementary transponders/transmitters, among which, the primary network can use the ground supplementary transponders/transmitters in all secondary networks, and a secondary network can only use the secondary network The ground supplementary transponders/transmitters within the network; the air frequency resources occupied by the networks at all levels are allocated by the national operators, and the air resources occupied by each business/program of the networks at all levels are allocated by the network managers at the corresponding level.
第二步，网络的数据复用和信号传输。The second step is the data multiplexing and signal transmission of the network.
一级网络的业务/节目在一级网络复用器完成复用后的数据流，包括开销信息和业务数据，可以有如下两条路径到达广播终端：After the service/program of the first-level network is multiplexed in the first-level network multiplexer, the data stream, including overhead information and service data, can reach the broadcast terminal through the following two paths:
一条路径是通过一级网络的下行链路，由一级网络卫星广播发射机直接发送给一级网络服务区域内的所有移动多媒体广播终端；One path is through the downlink of the first-level network, which is directly sent by the first-level network satellite broadcast transmitter to all mobile multimedia broadcast terminals in the service area of the first-level network;
另一条路径是经过一级网络的分发网络送到各个二级网络的地面增补转发器/发射机上，经过地面增补转发器/发射机下行链路发送给各个二级网络范围内的移动多媒体广播终端。The other path is sent to the ground supplementary transponder/transmitter of each secondary network through the distribution network of the primary network, and sent to the mobile multimedia broadcasting terminal within the scope of each secondary network through the downlink of the ground supplementary transponder/transmitter .
而一个二级网络的区域性业务/节目在二级网络复用器完成复用后的数据流，发送到二级网络内的地面增补转发器/发射机上，再通过其下行链路发送给二级网络服务区域内的所有移动多媒体广播终端。The data stream of the regional service/program of a secondary network is multiplexed in the multiplexer of the secondary network, sent to the ground supplementary transponder/transmitter in the secondary network, and then sent to the secondary network through its downlink All mobile multimedia broadcasting terminals within the service area of the level network.
第三步，移动终端的信号接收。The third step is the signal reception of the mobile terminal.
移动终端进入整个移动多媒体广播网络后，判断该终端是仅位于一级网络覆盖的区域，还是位于一个一级网络和二级网络共同覆盖的区域。After the mobile terminal enters the entire mobile multimedia broadcasting network, it is judged whether the terminal is located only in the area covered by the primary network, or in the area covered by both the primary network and the secondary network.
如果仅位于一级网络覆盖区域，则该终端只能接收一级网络的业务，根据基本载频上的控制信息选择希望接收的节目。If it is only located in the coverage area of the first-level network, the terminal can only receive the service of the first-level network, and select the desired program according to the control information on the basic carrier frequency.
如果终端位于一级网络和二级网络共同覆盖的区域，则该终端既可以接收一级网络的业务，也可以接收二级网络的业务。If the terminal is located in an area covered by both the primary network and the secondary network, the terminal can receive services from both the primary network and the secondary network.
如果终端脱离二级网络覆盖区域时，中断当前服务，然后转到一级网络的基本载频，提示用户重新选择。If the terminal leaves the coverage area of the secondary network, the current service is interrupted, and then transferred to the basic carrier frequency of the primary network, prompting the user to select again.
其中，上述第一步当中提及的空中频率资源及其分配，是指不同层次网络使用不同频率进行业务/数据传送，该频率成为载频。其中每层网络可以使用多个载频，此情况下，应指定一个载频作为基本载频。在本实施例当中，一级网络的基本载频为f1，而一级网络使用的基本载频不能被二级网络使用；不同的二级网络使用的载频可以是相同的，也可以是不同的。如图3所示，二级网络2A和2B使用相同的二级网络基本载频f2，展示了移动多媒体广播分级网络的空中频率资源分配。Wherein, the air frequency resources and their allocation mentioned in the first step above refer to different frequencies used by networks at different levels for service/data transmission, and the frequencies become carrier frequencies. Each network layer can use multiple carrier frequencies. In this case, one carrier frequency should be designated as the basic carrier frequency. In this embodiment, the basic carrier frequency of the primary network is f1, and the basic carrier frequency used by the primary network cannot be used by the secondary network; the carrier frequencies used by different secondary networks can be the same or different of. As shown in Fig. 3, the secondary network 2A and 2B use the same basic carrier frequency f2 of the secondary network, showing the air frequency resource allocation of the mobile multimedia broadcasting hierarchical network.
当二级网络使用多个载频时，同样应指定一个载频作为二级网络的基本载频，二级网络的业务首先选择在二级网络的基本载频上承载，除非二级网络的基本载频上没有足够容量才使用二级网络的其它载频。When the secondary network uses multiple carrier frequencies, one carrier frequency should also be designated as the basic carrier frequency of the secondary network. The services of the secondary network should first be carried on the basic carrier frequency of the secondary network, unless the basic There is not enough capacity on the carrier frequency to use other carrier frequencies of the secondary network.
在一级网络的基本载频上所承载的控制信息中，除了本载频必需的各种控制信息外，还包括了一级网络中其它载频的描述信息和二级网络基本载频的描述信息，例如频率信息、带宽信息等；由于二级网络基本载频的选择有两种方案，所以一级网络中提供的二级网络基本载频描述信息也有两种情况：In the control information carried on the basic carrier frequency of the first-level network, in addition to various control information necessary for this carrier frequency, it also includes the description information of other carrier frequencies in the first-level network and the description of the basic carrier frequency of the second-level network Information, such as frequency information, bandwidth information, etc.; since there are two options for the selection of the basic carrier frequency of the secondary network, there are also two situations for the basic carrier frequency description information of the secondary network provided in the primary network:
第一种情况是所有二级网络使用相同频率的基本载频时，此时一级网络中只需要提供一个二级网络基本载频的描述信息；The first case is when all secondary networks use the same basic carrier frequency, at this time, only one secondary network basic carrier frequency description information needs to be provided in the primary network;
另一种情况是不同的二级网络使用不同频率的基本载频时，一级网络中应提供一组二级网络基本载频的描述信息。Another situation is that when different secondary networks use basic carrier frequencies of different frequencies, the primary network should provide a set of description information of the basic carrier frequencies of the secondary network.
在实施例的步骤3当中，移动终端根据其所处位置的不同，可以选择性接收移动多媒体广播网(一级网络或二级网络)业务/节目，如图4所示：In step 3 of the embodiment, the mobile terminal can selectively receive services/programs of the mobile multimedia broadcasting network (primary network or secondary network) according to its location, as shown in Figure 4:
终端开始使用移动多媒体广播网的服务时，终端首先接入一级网络基本载频，根据基本载频上的控制信息来选择自己希望接收某一个节目；When the terminal starts to use the service of the mobile multimedia broadcasting network, the terminal first accesses the basic carrier frequency of the first-level network, and selects a certain program that it wants to receive according to the control information on the basic carrier frequency;
终端同时位于一个二级网络覆盖区域时，除了接收此二级网络的节目外，还可以接收到一级网络的节目，如图中的终端a可以收到一级网络的业务和二级网络2A的业务，终端2b和终端2c同样可以收到一级网络和二级网络的业务；When the terminal is located in a secondary network coverage area at the same time, in addition to receiving the programs of the secondary network, it can also receive the programs of the primary network, as shown in the figure, terminal a can receive the service of the primary network and the service of the secondary network 2A business, the terminal 2b and terminal 2c can also receive the business of the primary network and the secondary network;
终端仅位于一级网络的覆盖区域时，将只能收到一级网络的业务，例如图中的终端d；When the terminal is only located in the coverage area of the first-level network, it can only receive the services of the first-level network, such as terminal d in the figure;
当终端在使用某一个二级网络2A的服务，但发生脱离二级网络2A的覆盖区域的情况时，终端先提示用户当前服务将中断或直接中断，然后转到一级网络上基本载频上提示用户重新选择。When the terminal is using the service of a certain secondary network 2A, but it is out of the coverage area of the secondary network 2A, the terminal will first prompt the user that the current service will be interrupted or directly interrupted, and then transfer to the basic carrier frequency on the primary network Prompt the user to choose again.
本发明所述的一种移动多媒体广播网络的分级传输的方法，还可有其他多种实施例，并不仅仅限于说明书和实施方式中所列运用，它完全可以被适用于各种适合本发明之领域，对于熟悉本领域的人员而言可容易地实现另外的优点和进行修改，因此在不背离权利要求及等同范围所限定的一般概念的精神和范围的情况下，本发明并不限于特定的细节，代表性的设备和这里示出与描述的图示示例。The hierarchical transmission method of a mobile multimedia broadcasting network described in the present invention can also have other various embodiments, and it is not limited to the applications listed in the description and the implementation, and it can be fully applied to various types suitable for the present invention. Additional advantages and modifications can be readily realized by those skilled in the art, so the present invention is not limited to the specific The details, representative devices, and illustrative examples shown and described herein.
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