WO2012055227A1

WO2012055227A1 - Method and device for china mobile multimedia broadcast (cmmb) multiplexing

Info

Publication number: WO2012055227A1
Application number: PCT/CN2011/073767
Authority: WO
Inventors: 夏智海; 陈志兵; 谢立强; 林彬
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-10-26
Filing date: 2011-05-06
Publication date: 2012-05-03
Also published as: CN101980532A

Abstract

A method and device for China Mobile Multimedia Broadcast (CMMB) multiplexing are disclosed by the present invention. The method includes: determining that the environment data or the local control information meets the preset trigger condition during the process of the CMMB data transmission (S102); generating a dynamic multiplexing trigger message according to the trigger condition (S104); matching the dynamic multiplexing trigger message with the stored multiplexing policies to obtain the multiplexing policy corresponding to the trigger condition (S106); and multiplexing the data by the corresponding multiplexing policy and the CMMB protocol (S108). The present invention achieves the effect of meeting the requirement of different service rates under different conditions.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method and apparatus for multiplexing China Mobile Multimedia Broadcast (CMMB). BACKGROUND OF THE INVENTION With the development and commercialization of CMMB, more and more data applications have emerged, such as electronic newspapers, navigation information, financial guides and other data applications. In the current limited bandwidth, the transmission of data services mainly depends on two methods: one is to specifically allocate traffic slots to transmit data services; the other is to share time slots with audio and video services, and utilize the remaining bandwidth of the time slots in which audio and video services are located. Transfer data services. However, both methods are limited to the number of fixed audio and video services, and the bandwidth that the data service can utilize is not much. It takes a long time to completely receive business data such as an electronic newspaper, resulting in a poor user experience. The existing multiplexing methods and devices all adopt a fixed time slot allocation mode. Once the time slot allocation of each service is determined, the time slot allocation scheme runs continuously. Therefore, the multiplexing strategy is easy to occur in the multiplexing process. The problem of actual needs cannot be met, so that bandwidth resources cannot be fully utilized. SUMMARY OF THE INVENTION A main object of the present invention is to provide a CMMB multiplexing scheme to solve at least the problem that the above-mentioned related technologies in the related art that are easy to be multiplexed in the multiplexing process cannot meet actual needs. In order to achieve the above object, according to an aspect of the present invention, a CMMB multiplexing method is provided, the method comprising: determining, in a CMMB data transmission process, that environment data or local control information meets a predetermined trigger condition; The condition generates a dynamic multiplexing trigger message; the dynamic multiplexing trigger message is used to match the reuse strategy corresponding to the trigger condition in the stored multiplexing policy; and the data is multiplexed by using the corresponding multiplexing policy and the CMMB protocol. Preferably, after the multiplexing policy corresponding to the triggering condition is matched in the stored multiplexing policy by using the dynamic multiplexing trigger message, the method further includes: notifying the front-end device to synchronize the front-end device according to the multiplexing policy. Preferably, the front-end device is notified to multiplex the policy synchronization front-end device to include at least one of: notifying the modulator to reset or update the multi-frame 0; starting or stopping the encoder to send data; turning on or off the designated data broadcast service; notifying the electronic service guide The ESG server updates the data. Preferably, before the multiplexing policy corresponding to the trigger condition is matched in the stored multiplexing policy by using the dynamic multiplexing trigger message, the multiplexing policy under different trigger conditions is stored. Preferably, determining that the environmental data or the local control information meets the predetermined trigger condition comprises at least one of: determining a local timer timeout; determining that the local counter count meets the predetermined number of times; determining that the number of users of one program is lower than the first predetermined threshold ; determining that the number of votes for a user who is expected to play a program is higher or lower than a second predetermined threshold. Preferably, the dynamic multiplexing trigger message includes at least one of the following: a type of a trigger condition, a number of elements of each type that satisfy the trigger condition, and a priority of the type. In order to achieve the above object, according to another aspect of the present invention, a CMMB multiplexing apparatus is provided, the apparatus comprising: a determining module configured to determine environmental data or local control information to satisfy a predetermined schedule during CMMB data transmission a triggering condition; a generating module, configured to generate a dynamic multiplexing trigger message according to the triggering condition; and a matching module configured to match the reused policy corresponding to the triggering condition in the stored multiplexing policy by using the dynamic multiplexing trigger message; , set to reuse data using the corresponding multiplexing policy and CMMB protocol. Preferably, the foregoing apparatus further includes: a notification module, configured to notify the front end device to synchronize the front end device according to the multiplexing policy. Preferably, the foregoing apparatus further includes: a storage module, configured to store a multiplexing policy under different trigger conditions. Preferably, the determining module is configured to determine that the local timer expires, the local counter count satisfies the predetermined number of times, the number of users of one program is lower than the first predetermined threshold, or the number of users voting for an intended program is higher or lower than the second predetermined Threshold. Through the invention, the method for adjusting the multiplexing strategy in the actual situation of the CMMB data transmission process solves the problem that the strategy that is easy to occur in the multiplexing process in the related technology cannot meet the actual needs, and thus achieves the problem. The effect of meeting different business rates in different situations. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flow chart of a CMMB multiplexing method according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of a multiplexing device according to an embodiment of the present invention; FIG. 4 is a schematic diagram of applying different multiplexing policies in different triggering conditions according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a time slot structure of a multiplexing policy 1 according to an embodiment of the present invention; 6 is a schematic diagram of a time slot structure of the multiplexing policy 2 in the embodiment of the present invention; FIG. 7 is a schematic diagram of a time slot structure of the multiplexing policy 3 in the embodiment of the present invention; FIG. 8 is a CMMB multiplexing device according to an embodiment of the present invention; Block diagram of the structure. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Embodiment 1 This embodiment provides a CMMB multiplexing method. FIG. 1 is a flowchart of a CMMB multiplexing method according to an embodiment of the present invention. As shown in FIG. 1, the method includes: Step S102, CMMB data transmission In the process, the environment data or the local control information is determined to meet the predetermined trigger condition. Step S104: The dynamic multiplexing trigger message is generated according to the trigger condition. The dynamic multiplexing trigger message includes at least one of the following information: The type, the number of elements in each type that satisfy the trigger condition, and the priority of the type. In step S106, the multiplexing policy corresponding to the triggering condition is matched in the stored multiplexing policy by using the dynamic multiplexing trigger message. Step S108: The data is multiplexed by using the corresponding multiplexing policy and the CMMB protocol. In this embodiment, in the CMMB data transmission process, the multiplexing policy is adjusted according to the actual situation, thereby achieving the effect of meeting different service rates in different situations. After the dynamic multiplexing trigger message is used in the stored multiplexing policy to match the multiplexing policy corresponding to the trigger condition (that is, the new multiplexing policy is obtained), the front-end device is notified to synchronize the front-end device according to the multiplexing policy. The front-end device here refers to all devices of the transmitting station, such as modulators, encoders, data broadcasting services, and ESG servers. In actual operation, the front-end device is notified to synchronize the front-end device according to the multiplexing policy, and may include at least one of: notifying the modulator to reset or update the multi-frame 0; starting or stopping the encoder to send data; turning on or off the designated data broadcast service; Notify the Electronic Business Guide ESG server to update data. In a specific example, the multiplexing policy under different trigger conditions is stored first, and then the multiplexing policy corresponding to the triggering condition is matched in the stored multiplexing policy by using the dynamic multiplexing trigger message. Preferably, determining that the environmental data or the local control information meets the predetermined trigger condition comprises at least one of: determining a local timer timeout; determining that the local counter count meets the predetermined number of times; determining that the number of users of one program is lower than the first predetermined threshold ; determining that the number of votes for a user who is expected to play a program is higher or lower than a second predetermined threshold. The environmental data may be, but is not limited to, the number of users of one program. The local control information may be, but not limited to, a timer and a counter. The first predetermined threshold and the second predetermined threshold may be preset according to actual conditions. Embodiment 2 FIG. 2 is a schematic structural diagram of a multiplexing device according to an embodiment of the present invention. As shown in FIG. 2, the device includes: a console module, a dynamic multiplexing trigger condition processing module, a dynamic multiplexing policy library, and dynamic multiplexing. Policy decision module, multiplexing module, device synchronization module and output module. The function of each module is described in detail below. The console module is configured to configure a dynamic multiplexing trigger condition control module, a dynamic multiplexing policy library, and a dynamic multiplexing policy decision module. The dynamic multiplexing trigger condition control module is configured to utilize input environmental data (eg, number of users per program, distribution of programs viewed by the user) or local (ie, system itself) control information (eg, timers, counters, etc.) It is automatically determined whether the trigger condition of the dynamic multiplexing policy is formed, wherein the number of users per program and the distribution of programs viewed by the user refer to the user distribution of the program, which may be taken during use. In addition, the environment trigger condition may also be feedback feedback information of the user on an intended broadcast program. If a trigger condition of the dynamic multiplexing policy is formed, a dynamic multiplexing trigger message is generated. The dynamic multiplexing trigger message contains information such as the type of trigger condition, the number of conditions of a certain type, and the priority of each type. The dynamic reuse policy library is set to store reuse strategies under different trigger conditions. The dynamic multiplexing policy decision module is configured to receive the dynamic multiplexing trigger message, and match the dynamic multiplexing policy from the dynamic multiplexing policy library according to information such as the type, quantity, and priority of the trigger message, and then apply the successfully matched dynamic multiplexing policy. The multiplexing module and the front-end device synchronization module. The multiplexing module is configured to receive data from a data source that needs to be multiplexed, such as an audio and video encoder, a data broadcast server, an Electronic Service Guide (ESG) server, and the like. Apply the multiplexing strategy generated by the dynamic multiplexing policy library to multiplex the input data into multiplex frames that conform to the CMMB standard. The output module is configured to package the multiplexed frame into a Packaged Multiplexing Stream (PMS) according to the CMMB protocol and output it to the next device. The front-end device synchronization module is configured to notify the relevant front-end device to synchronize according to the multiplexing policy. For example, reset the modulator, control the code rate of the encoder, turn on the specified data broadcast service, notify the ESG server to update the data, and so on. In actual application, the above device may be a multiplexer. In this embodiment, the method of dynamically multiplexing using the above apparatus includes the following steps A to

E. Step A. Multiplexing module The multiplexing strategy and the CMMB protocol package the input data into multiplexing.

Step B. The output module packs the multiplexed frame into a PMS stream and outputs it to the next device according to the CMMB protocol. Step c. If the dynamic multiplexing trigger condition control module determines that one or more trigger conditions are met, a trigger message is sent to the dynamic multiplexing policy generation module. In step C, the dynamic multiplexing trigger condition control module first dynamically changes the environment data (network state feedback information, user quantity feedback information, channel utilization feedback information, etc.) or its own control information (such as timers, counters, etc.). Determine whether the trigger condition of the dynamic multiplexing policy is met. If yes, generate a trigger message, and send the trigger message to the dynamic multiplexing policy decision module, so as to adjust the multiplexing policy, achieve the purpose of fully utilizing the bandwidth and improving the user experience. Step D. After receiving the dynamic multiplexing trigger message, the dynamic multiplexing policy decision module matches the dynamic multiplexing policy according to the type, quantity, and priority of the trigger condition carried in the trigger message, and successfully matches the matching. The policy applies to the multiplexing module and the front-end device synchronization module. Step E. The multiplexing module applies a new multiplexing strategy to multiplex the input data, and the front-end device synchronizes the front-end device according to the multiplexing policy. Compared with the related art, this embodiment introduces a dynamic multiplexing trigger condition processing module, a dynamic multiplexing strategy library, and a dynamic multiplexing policy decision mechanism, so as to apply different multiplexing strategies under different conditions. In this way, on the one hand, the utilization of the bandwidth is improved, and on the other hand, the need to meet different service rates in different situations is ensured. Moreover, in the embodiment, while introducing the device synchronization control module and applying the new multiplexing strategy, the device synchronization control module adjusts the operating parameters of the related device, thereby achieving the purpose that the entire front-end system is in an optimal running state, and the CMMB is improved. The stability of the front-end system operation. Embodiment 3 In this embodiment, the trigger condition is a timer message, and the object of the dynamic multiplexing policy adjustment is the time slot j, j+1, j+2, j+3 as an example (note that the trigger condition is not limited to The timer message, the adjustment object is not limited to the time slots j, j+1, j+2, j+3). The dynamic multiplexing method of the present invention will be described. This embodiment still uses the multiplexing device in the second embodiment. FIG. 3 is a schematic diagram of an update process of a dynamic multiplexing policy according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps: Step 1: The dynamic multiplexing trigger condition processing module tracks a trigger condition. Step 2: Determine whether the dynamic multiplexing trigger condition processing module tracks whether the trigger condition is formed (in this example, the trigger condition is a timer timeout). Step 3: When the timer expires to form a trigger condition, the dynamic multiplexing trigger condition processing module issues a trigger message of the timer timeout to the dynamic multiplexing policy decision module. Step 4: After receiving the trigger message, the dynamic multiplexing policy decision module determines the type, quantity, and priority of the trigger message, where the type is a trigger condition type, such as a timer, a counter, etc., and the quantity is in a certain type. The number of the elements of the element that meets the trigger condition. For example, if two timers satisfy the trigger condition, the number of trigger types of the timer is 2, and the priority is the priority of each trigger type. For example, the timer type can be set. The priority is higher than the priority of the counter. When both the timer and counter trigger conditions are met, a new multiplexing policy can be selected according to the type of the timer. After discriminating the type, quantity, and priority of the trigger message, the dynamic multiplexing policy library is queried to find a multiplexing policy that matches the trigger message. Step 5: The dynamic multiplexing policy decision module notifies the multiplexing module to apply the policy to multiplex input data such as audio and video data, data broadcast data, and ESG data. Step 6: At the same time as step 5, the front-end device synchronization control module is notified to send a corresponding synchronization instruction to the relevant front-end device according to the multiplexing policy. Step 4 is 7 and repeating step 4 is 1-6. FIG. 4 is a schematic diagram of applying different multiplexing strategies under different trigger conditions according to an embodiment of the present invention. As shown in FIG. 4, in time period 1, the multiplexing module is applied. The multiplexing strategy 1 multiplexes the data to output a multiplexed frame of the slot structure as shown in Figure 5. In the embodiment of the present invention, in the case of dynamic multiplexing, a timer may be defined to specify a certain timer. The multiplexing policy corresponding to the timeout takes effect or fails. The correspondence between the timer and the policy can be set according to the actual situation. For example, if the finite time of a certain multiplexing policy is specified as t, then the multiplexing policy can be effective. A timer is started, and its timing is t. When the timer expires, the multiplexing policy is invalid. When the trigger condition 1 (that is, the timer 1 times out) is formed, the multiplexing policy update process is performed, and the multiplexing module is applied. The multiplexing strategy 2 outputs a multiplexing frame of the slot structure as shown in Fig. 6. When the trigger condition 2 (that is, the timer 2 times out) is formed, after the multiplexing policy update process, the multiplexing module applies the multiplexing strategy 3, and outputs As shown in Figure 7 The multiplexing frame of the slot structure. In this way, different multiplexing strategies are applied for different time periods. When a combination of network state feedback information, user quantity feedback information, channel utilization feedback information, timers and counters are triggered ( When not limited to the combination of the above information, the dynamic multiplexing policy decision module determines which multiplexing strategy to match according to the type, quantity, and priority of the triggering condition. The embodiment of the present invention further provides a CMMB multiplexing device, which is used to implement the foregoing solution, and the multiplexing device may be a multiplexer. FIG. 8 is a structural block diagram of a CMMB multiplexing apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes: a determining module 82 configured to determine that environmental data or local control information meets a predetermined schedule during CMMB data transmission. a triggering condition; a generating module 84, coupled to the determining module 82, configured to generate a dynamic multiplexing trigger message according to the triggering condition; the matching module 86, coupled to the generating module 84, configured to use the dynamic multiplexing trigger message in the stored complex The multiplexing policy corresponding to the trigger condition is obtained by matching in the policy; the multiplexing module 88 is coupled to the matching module 86, and is configured to use the corresponding multiplexing policy and the CMMB protocol to multiplex the data. Preferably, the apparatus further comprises: a notification module, configured to notify the front end device to synchronize the front end device according to the multiplexing policy. Preferably, the apparatus further comprises: a storage module configured to store a multiplexing policy under different trigger conditions. Preferably, the determining module 82 is configured to determine that the local timer expires, the local counter count satisfies the predetermined number of times, the number of users of one program is lower than the first predetermined threshold, or the number of users voting for an intended program is higher or lower than the second. Schedule a threshold. It should be noted that the apparatus shown in this embodiment has a corresponding relationship with the apparatus shown in FIG. 2, wherein the determining module 82 and the generating module 84 correspond to a trigger condition processing module, and the matching module 86 corresponds to a dynamic multiplexing policy decision. The module, the multiplexing module 88 corresponds to the multiplexing module in FIG. 2, and the notification module in this embodiment corresponds to the device synchronization control module in FIG. 2, and the storage module in this embodiment corresponds to the dynamic in FIG. Reuse the policy library. In summary, the present invention achieves the effect of meeting different service rate requirements and improving bandwidth utilization under different conditions. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described, or separate them into individual integrated circuit modules, or make multiple modules or steps in them Implemented as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

1. A Chinese mobile multimedia broadcast CMMB multiplexing method, including:

During the CMMB data transmission process, it is determined that the environmental data or the local control information satisfies a predetermined trigger condition;

Generating a dynamic multiplexing trigger message according to the trigger condition;

And using the dynamic multiplexing trigger message to match, in the stored multiplexing policy, a multiplexing policy corresponding to the trigger condition;

The data is multiplexed using the corresponding multiplexing strategy and the CMMB protocol.

The method according to claim 1, after the matching, by using the dynamic multiplexing trigger message, the multiplexing policy corresponding to the triggering condition in the stored multiplexing policy, the method further includes:

Notifying the front end device that the multiplexing policy synchronizes the front end device.

3. The method according to claim 2, informing the front end device to synchronize the front end device according to the multiplexing policy, comprising at least one of the following:

Notifying the modulator to reset or update the multiframe 0;

Start or stop the encoder to send data; turn the specified data broadcast service on or off;

Notifications Electronic Business Guide ESG Server Update Data.

The method according to claim 1, before using the dynamic multiplexing trigger message to match the multiplexing policy corresponding to the trigger condition in the stored multiplexing policy, storing the multiplexing policy under different trigger conditions.

5. The method of claim 1, determining that the environmental data or local control information satisfies the predetermined trigger condition comprises at least one of the following:

Determine the local timer timeout;

Determining that the local counter count meets the predetermined number of times;

Determining the number of users of a program ^ ^ at a first predetermined threshold; Determining that the number of votes for a user who is expected to play a program is higher or lower than a second predetermined threshold.

The method according to claim 1, wherein the dynamic multiplexing trigger message includes at least one of the following information: a type of the trigger condition, a quantity of an element that satisfies the trigger condition among each of the types, and the type Priority.

7. A CMMB multiplexing device, including:

Determining a module, configured to determine that the environmental data or the local control information meets a predetermined trigger condition during the CMMB data transmission process;

a generating module, configured to generate a dynamic multiplexing trigger message according to the triggering condition; the matching module is configured to use the dynamic multiplexing trigger message to match the reused policy corresponding to the triggering condition in the stored multiplexing policy;

A multiplexing module configured to multiplex data using the corresponding multiplexing strategy and the CMMB protocol.

8. The device of claim 7, the device further comprising:

The notification module is configured to notify the front end device to synchronize the front end device according to the multiplexing policy.

9. The device of claim 7, the device further comprising:

A storage module, set to store multiplexing policies under different trigger conditions.

10. The apparatus according to claim 7, wherein the determining module is configured to determine that a local timer expires, a local counter count satisfies a predetermined number of times, a number of users of a program is below a first predetermined threshold, or a user who is expected to play a program The number of votes is above or below the second predetermined threshold.