WO2008028359A1

WO2008028359A1 - A method of hierarchical transmission for mobile multimedia broadcast network

Info

Publication number: WO2008028359A1
Application number: PCT/CN2006/003669
Authority: WO
Inventors: Biao Wang; Xiaoguang Zhu; Hua Jiang
Original assignee: Zte Corporation
Priority date: 2006-08-31
Filing date: 2006-12-29
Publication date: 2008-03-13
Also published as: CN100578976C; CN1960222A

Abstract

A method of hierarchical transmission for mobile multimedia broadcast network is disclosed, firstly, dividing the entire mobile multimedia broadcast system into multi-level network structure, configuring separate network resource for each network in each level network. Secondly, after the traffic of the upper level network is data stream multiplexed, it will be sent directly to all the terminals in this level network cover area via the transmitter of this level network, or sent to the corresponding receivers via the transmitters of the distributing network and the lower level network. Finally, the receiver receives signals from different networks selectively according to the network range in which it resides. The method according to the present invention solves the bottleneck problem that the permit of the network operator must be obtained when a service needs to be sent across different areas, realizes the national network really, and realizes the national broadcast service and the combination of the national network operating and the local network operating better.

Description

FIELD OF THE INVENTION The present invention relates to network hierarchy and signal transmission, and more particularly to a method for implementing hierarchical transmission in a mobile multimedia broadcast network. BACKGROUND OF THE INVENTION In recent years, digital mobile multimedia broadcasting technologies and standards have developed rapidly, and various digital mobile multimedia broadcasting networks developed in Europe and the United States based on different technologies and standards have emerged, such as DVB-H (digital video insertion) in Europe. ^ "Handheld Receiver: Digital Video Broadcast Handheld" US MediaFLO (Media Single Forward Link: Media Forward Link Only), Mobile Cell-Based BCMCS (Broadcast and Multicast Services) and BCAST (Broadcast: Broadcast), etc., and can provide many end-users with service content, such as advertisements, weather forecasts, news, sports programs, variety shows, multimedia shows, "drama, movies, etc.", users can choose according to their own preferences. A service program for mobile multimedia broadcasting. The coverage areas of different services or programs are large and small. For example, a channel can cover a country, a province, a city, or even a part of a city. The traditional broadcast network is: after receiving the service data in each area, it is multiplexed locally and then sent to the user terminal in the local area. As shown in Figure 1, it is a schematic diagram of multiplexing locally after receiving service data from each region. Specifically, the foreign program source transmits the broadcast signal to each regional network through a large-scale wide-area transmission network, and the services and data are multiplexed at the multiplexers installed in each place, and then passed through the signal transmitting stations of the localities. This multiplexed signal is transmitted to each user terminal in the local range. However, in the mode shown in Figure 1, in fact, the entire national wide network is composed of a regional network, and for a business to be broadcast nationwide, it is necessary to obtain each regional network operator. The permission, therefore, does not have a national network in the true sense, making the transmission of national large-scale network signals quite difficult. Therefore, in the continuous development of digital mobile multimedia broadcasting services, how to stratify the entire large-scale network, so that the links between the layers and the same layers are more compact and convenient, realizing a national network in a true sense. , simplify the national network signal transmission process, better meet the national wide The demand for broadcasting services has become an urgent problem to be solved. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is to provide a method for hierarchical transmission of a mobile multimedia broadcast network, which realizes an organic combination of nationwide network operation and regional network operation, and facilitates convenient reception of regionality by end users as needed. Or a national festival. In order to solve the above technical problem, the present invention provides a method for hierarchical transmission of a mobile multimedia broadband network, the method comprising the following steps:

(1) Divide the entire mobile multimedia wide-interpolation system into a multi-level network structure according to the requirements of the coverage area, so that one upper-level network covers one or more sub-networks in the geographical area; (2) for the networks in all levels of the network Configuring a separate multiplexer and transmitter;

(3) Configuring different basic carrier frequencies for each level of network;

(4) The service of the upper-level network completes the multiplexed data stream in the multiplexer of the network at the same level, and directly sends it to all terminals in the coverage area of the local network through the transmitter of the local network, or sends it to the lower-level network through the distribution network. The transmitter is then sent to all terminals in the coverage area of the network via the subordinate network transmitter. Wherein, the present invention may further comprise the steps of:

(5) After the terminal enters the entire mobile multimedia broadcast network, it is determined whether the terminal is located only in an area covered by the upper-level network, or is located in an area covered by the upper-level network and the lower-level network;

(6) If it is only located in the coverage area of the upper-level network, the terminal can only receive the service of the upper-level network, and select the program that is desired to be received according to the control information on the basic carrier frequency;

(7) If the terminal is located in the area covered by the upper-level network and the lower-level network, the terminal can receive the services of the upper-level network or the services of the lower-level network. Among them, you can further include 4 tongue steps:

(8) If the terminal leaves the subordinate network coverage area, interrupt the current monthly service, and then go to the basic carrier frequency of the upper network, prompting the user to reselect. Compared with the prior art, the advantages of the present invention are as follows: The method for hierarchical transmission of the mobile multimedia broadcast network introduced by the present invention stratifies a large national network, and solves the problem that the network signal must be obtained when transmitting services across regions. Bottlenecks allowed by network operators, realizing a nationwide network in a true sense, better achieving national broadcasting services, and an organic combination of national network operations and regional network operations. The technical problems to be solved by the present invention, the technical solutions, and the advantageous effects will be further described with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a conventional broadcast network; FIG. 2 is a schematic structural diagram of a hierarchical network; FIG. 3 is a schematic diagram of resource allocation of a hierarchical network; FIG. 4 is a schematic diagram of a relationship between a location of a terminal and a signal reception result. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention solves the problem that nationwide services must be obtained nationwide, and must obtain the permission allowed by each regional network operator. Providing a method for hierarchical signal transmission in a mobile multimedia broadcast network can be more To meet the needs of the national broadcasting service well. In general, the present invention first needs to form a nationwide tiered network, that is, to divide the entire mobile multimedia broadcasting system into a multi-level network structure according to the requirements of the coverage area, so that Geographically, a superior network covers one or more subordinate networks; at the same time, separate multiplexers and transmitters are configured for networks in each level of the network, and different basic carrier frequencies are configured for each level of the network. After the multiplexed device of the network in the network completes the multiplexed data stream, it can be directly sent to all terminals in the coverage area of the network through the transmitter of the local network, or sent to the lower network through the distribution network. On-board, it is sent to all terminals in the coverage area of the network via the subordinate network transmitter. On the receive side, after receiving the terminal access to the entire mobile multimedia broadcast network, may determine whether the terminal is located only in a region covering the upper network, or in a lower-level network and the upper network co If the terminal is located in the upper-level network coverage area, the terminal can only receive the service of the upper-level network, and select the program that is desired to be received according to the control information on the basic carrier frequency; if the terminal is located in the area covered by the upper-level network and the lower-level network The terminal can receive the services of the upper-level network as well as the services of the lower-level network. When the receiving terminal leaves the subordinate network coverage area, the current service can be interrupted, and then the basic carrier frequency of the upper network is forwarded, prompting the user to reselect. In the following, the invention will be further illustrated by an embodiment of a two-stage network signal transmission. Referring to FIG. 2, the following steps may be included: First step, network layering and resource configuration. In this embodiment, the entire mobile multimedia broadcast system is divided into two levels of network structure according to the requirements of the coverage area, that is, the entire network layer is divided into one level network (the network coverage area is large, such as a country) and multiple Level network (each network has a small coverage area, such as a province or a city or a smaller area); each network has an independent multiplexer that performs the multiplexing of the corresponding overhead information and the data stream of the service data. Each network in the secondary network has a ground supplemental repeater/transmitter, where the primary network can use the ground supplemental repeater/transmitter in all secondary networks, and the secondary network can only use the secondary network. The ground-based patching transmitter/transmitter in the ground; the air frequency resources occupied by the networks at all levels are allocated by the national operators, and the air resources occupied by each service/program at each level of the network are the responsibility of the network administrator at the same level. distribution. The second step is data multiplexing and signal transmission of the network. The service/program of the primary network completes the multiplexed data stream in the primary network multiplexer, including the overhead information and the service data, and may have the following two paths to the broadcast terminal: one path is the downlink through the primary network , is sent directly by the primary network satellite broadcast transmitter to all mobile multimedia broadcast terminals in the primary network service area; the other path is sent to the ground supplemental repeater/transmitter of each secondary network through the distribution network of the primary network. The downlink supplemental repeater/transmitter downlink is sent to the mobile multimedia broadcast terminals in the range of each secondary network. And the secondary service/program of the secondary network completes the multiplexed data in the secondary network multiplexer. The stream is sent to a terrestrial supplemental repeater/transmitter within the secondary network and then transmitted over its downlink to all mobile multimedia broadcast terminals within the secondary network service area. The third step is signal reception of the mobile terminal. After the mobile terminal enters the entire mobile multimedia broadcast network, it is determined whether the terminal is located only in the area covered by the primary network or in the area covered by the primary network and the secondary network. If it is only located in the primary network coverage area, the terminal can only receive the services of the primary network, and select the program that is desired to be received according to the control information on the basic carrier frequency. If the terminal is located in an area covered by the primary network and the secondary network, the terminal can receive the services of the primary network as well as the services of the secondary network. If the terminal leaves the secondary network coverage area, the current service is interrupted, and then the basic carrier frequency of the primary network is prompted to prompt the user to reselect. Among them, the air frequency resources mentioned in the above first step and their allocations mean that different levels of networks use different frequencies for service/data transmission, and the frequency becomes a carrier frequency. Each carrier network can use multiple carrier frequencies. In this case, a carrier frequency should be specified as the base carrier frequency. In this embodiment, the basic carrier frequency of the primary network is fl, 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 may be the same or different. of. As shown in FIG. 3, the secondary networks 2A and 2B use the same secondary network basic carrier frequency to demonstrate the allocation of air frequency resources of the mobile multimedia broadcast hierarchical network. When the secondary network uses multiple carrier frequencies, the same carrier frequency should be designated as the basic carrier frequency of the secondary network. The service of the secondary network is first selected on the basic carrier frequency of the secondary network, unless the secondary network There is not enough capacity on the basic carrier frequency to use the other carrier frequencies of the secondary network. In the control information carried on the basic carrier frequency of the primary network, in addition to various control information necessary for the carrier frequency, the description information of other carrier frequencies in the primary network and the description of the basic carrier frequency of the secondary network are also included. Information, such as frequency information, bandwidth information, etc.; Since there are two options for selecting the basic carrier frequency of the secondary network, there are two cases of the basic carrier frequency description information of the secondary network provided in the primary network: The first case is all When the secondary network uses the basic carrier frequency of the same frequency, at this time, only the description information of the basic carrier frequency of the secondary network needs to be provided in the primary network; In another case, when different secondary networks use basic carrier frequencies of different frequencies, a description of the basic carrier frequency of a set of secondary networks should be provided in the primary network. In step 3 of the embodiment, the mobile terminal can selectively receive the mobile multimedia broadcast network (primary network or secondary network) service/program according to the location of the mobile terminal, as shown in FIG. 4: the terminal starts to use mobile multimedia. When the service of the broadcast network is used, the terminal first accesses the basic carrier frequency of the primary network, and selects a program to receive a certain program according to the control information on the basic carrier frequency; when the terminal is located in a secondary network coverage area, in addition to receiving the second level The program of the network can also receive the program of the first-level network. In the figure, the terminal a can receive the service of the primary network and the service of the secondary network 2A, and the terminal 2b and the terminal 2c can also receive the primary network. And the service of the secondary network; when the terminal is only located in the coverage area of the primary network, it will only receive the services of the primary network, such as the terminal d in the figure; when the terminal is using the service of a secondary network 2A, but When the coverage area of the secondary network 2A occurs, the terminal first prompts the user that the current service will be interrupted or directly interrupted, and then goes to the primary network. The user is prompted to reselect. The method for hierarchical transmission of a mobile multimedia broadcast network according to the present invention may have other various embodiments, and is not limited to the applications listed in the specification and the embodiment, and may be fully applicable to various suitable embodiments of the present invention. Further advantages and modifications may be readily made by those skilled in the art, and thus the present invention does not depart from the spirit and scope of the invention as defined by the appended claims. The invention is limited to specific details, representative devices and illustrative examples shown and described herein.

Claims

权禾ϋ Request, a method for hierarchical transmission of mobile multimedia broadcasts, the method comprising:

(1) Dividing the entire mobile multimedia broadcast system into a multi-level network structure according to the requirements of the coverage area, so that a higher-level network covers one or more lower-level networks;

(2) Configuring independent multiplexers and transmitters for networks in all levels of the network;

(3) Configuring different basic carrier frequencies for each level of network;

(4) The service of the upper-level network completes the multiplexed data stream in the network multiplexer of the current level, and directly sends it to all terminals in the coverage area of the network through the transmitter of the local network, or sends it to the lower-level network through the distribution network. At the transmitter, it is sent to all terminals in the coverage area of the network through the subordinate network transmitter. The method of claim 1, further comprising:

(7) If the terminal is located in an area covered by the upper-level network and the lower-level network, the terminal can receive the services of the upper-level network or the services of the lower-level network. The method of claim 2, further comprising:

(8) If the terminal is out of the subordinate network coverage area, the current service is interrupted, and then the basic carrier frequency of the upper network is forwarded, prompting the user to reselect. The method according to claim 1, wherein in the step (3), the basic carrier frequency configured for the upper-level network cannot be used by the lower-level network. The method according to claim 1, wherein the step (3) further comprises: configuring the same carrier frequency for different networks in the peer network. The method according to claim 1, wherein the step (3) further comprises: configuring different carrier frequencies for different networks in the peer network, and designating a carrier frequency of one of the networks as the level. The basic carrier frequency of the network.

The method according to claim 1, wherein in the step (3), the information carried by the basic carrier frequency of the upper-level network includes control information of the carrier frequency, and other carrier frequencies in the network at the same level. Control information, and description information of the basic carrier frequency of the subordinate network. The method according to claim 7, wherein the description information of the basic carrier frequency of the lower-level network includes frequency information and bandwidth information.

9. The method of claim 1 wherein said transmitter comprises a terrestrial supplemental transmitter.