WO2018045512A1 - 一种数据组呼方法、装置及系统 - Google Patents

一种数据组呼方法、装置及系统 Download PDF

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Publication number
WO2018045512A1
WO2018045512A1 PCT/CN2016/098350 CN2016098350W WO2018045512A1 WO 2018045512 A1 WO2018045512 A1 WO 2018045512A1 CN 2016098350 W CN2016098350 W CN 2016098350W WO 2018045512 A1 WO2018045512 A1 WO 2018045512A1
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WIPO (PCT)
Prior art keywords
identifier
data slice
server
terminal
data
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PCT/CN2016/098350
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English (en)
French (fr)
Inventor
梁则栋
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海能达通信股份有限公司
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Application filed by 海能达通信股份有限公司 filed Critical 海能达通信股份有限公司
Priority to PCT/CN2016/098350 priority Critical patent/WO2018045512A1/zh
Publication of WO2018045512A1 publication Critical patent/WO2018045512A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/16Arrangements for providing special services to substations
    • H04L12/18Arrangements for providing special services to substations for broadcast or conference, e.g. multicast

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a data group calling method, apparatus, and system. .
  • a typical implementation of a data group call is that the server broadcasts the same data to a group of terminals through the broadband to achieve the purpose of receiving the same data by a group of terminals.
  • the idea of retransmission is specifically: when a terminal cannot receive the data of the server correctly, the end The terminal may send feedback information to the server, and the feedback information includes a lost data identifier.
  • the server may broadcast the data corresponding to the lost data identifier to the terminal again according to the feedback information, so that the terminal can receive the data again, thereby ensuring data accuracy.
  • the present application provides a data group calling method, so as to achieve the purpose of retransmitting data to the server without causing the server to be unavailable, thereby improving the accuracy of data transmission.
  • a data group calling method including:
  • the missing data slice identifier is sent to the server.
  • the feedback threshold is greater than or equal to 1 and less than N.
  • the determining the current terminal lost data slice identifier corresponding to the target data identifier includes:
  • the determining, by the historical terminal, the missing data slice identifier and the current data slice object, determining that the current terminal loses the data slice identifier comprises:
  • the determining, by the historical terminal, the missing data slice identifier and the current data slice object, determining that the current terminal loses the data slice identifier comprises:
  • the intermediate lost data slice identifier and the lost data slice identifier are updated into the historical terminal lost data slice identifier, and the updated historical terminal lost data slice identifier is determined as the current terminal lost data slice identifier.
  • the above steps are repeatedly performed until the number of identifiers in the missing data slice identifier is not greater than the feedback threshold.
  • the method further includes:
  • the missing data slice identifier that is not included in the existing server lost data slice identifier is determined in the existing terminal lost data slice identifier; if the missing data slice is The non-empty set is identified, and the missing data slice identifier is sent to the server, and the final server data slice identifier is determined by the server.
  • the method further includes:
  • the server does not broadcast the current data slice object for the first time, determining whether the existing terminal lost data slice identifier includes the missing data slice identifier;
  • a data group calling method applied to a server of a data group calling system, the method includes:
  • the method further includes:
  • the method further includes:
  • the above steps are repeatedly performed until the final server data slice is identified as an empty set, or the number of data transmissions reaches a specified number of retransmissions.
  • the application further provides a terminal, including:
  • a first processor configured to determine a current terminal lost data slice identifier and a history server lost data slice identifier corresponding to the target data identifier; and determining, in the current terminal lost data slice identifier, the historical server lost data slice identifier If there is no missing data slice identifier; and if the number of identifiers in the missing data slice identifier is greater than a feedback threshold, the missing data slice identifier is sent to the communication module;
  • the first communication module is configured to send the missing data slice identifier to the server.
  • the application further provides a server, including:
  • a second communication module configured to receive a missing data slice identifier corresponding to the target data identifier sent by the terminal
  • a second processor configured to use the missing data slice identifier sent by the terminal in the terminal group, update the historical server lost data slice identifier, and obtain the current server lost data slice identifier; and control the communication module to broadcast the current server lost data.
  • Slice identification repeat the above steps until the data slice object containing the target data identifier is broadcast.
  • a data processing system comprising:
  • the server is configured to execute the data group calling method described above;
  • the terminal in each terminal group is used for the above data group calling method.
  • a data group calling device comprising:
  • a first determining unit configured to determine a current terminal lost data slice identifier and a history server lost data slice identifier corresponding to the target data identifier
  • a second determining unit configured to determine, in the current terminal lost data slice identifier, a missing data slice identifier that is not included in the history server lost data slice identifier;
  • a sending unit configured to send the missing data slice identifier to the server if the number of identifiers in the missing data slice identifier is greater than a feedback threshold.
  • a data group calling device comprising:
  • a receiving unit configured to receive a missing data piece identifier corresponding to the target data identifier sent by the terminal; use the missing data piece identifier sent by the terminal in the terminal group, update the history server lost data piece identifier, and obtain the current server lost data piece Identification
  • a broadcast unit configured to broadcast the current server lost data slice identifier.
  • the data group calling method provided by the present application the current terminal lost data piece identification and historical service
  • the device loses the data slice identifier for comparison, and determines the data slice identifier that is existing on the terminal but not on the server.
  • the data slice identifier is the data slice identifier of all the lost data slices that are missing on the server, and is referred to as the missing data slice identifier.
  • a feedback threshold may be set for the terminal.
  • the server is sent to the server.
  • the missing data slice identifier is sent.
  • the missing data slice identifier is not sent to the server.
  • FIG. 1 is a schematic structural diagram of a data group call system disclosed in an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a server and a terminal in a data group calling system according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart of a data renting method disclosed in an embodiment of the present application.
  • FIG. 5 is a flowchart of still another data renting method disclosed in an embodiment of the present application.
  • FIG. 6 is a flowchart of still another data renting method disclosed in an embodiment of the present application.
  • FIG. 7 is a flowchart of still another data renting method disclosed in an embodiment of the present application.
  • FIG. 8 is a flowchart of still another data renting method disclosed in an embodiment of the present application.
  • FIG. 9 is a flowchart of still another data renting method disclosed in an embodiment of the present application.
  • FIG. 10 is a flowchart of still another data renting method disclosed in an embodiment of the present application.
  • FIG. 11 is a flowchart of still another data renting method disclosed in an embodiment of the present application.
  • FIG. 12 is a schematic diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic diagram of a server according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a data renting and calling device according to an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of still another data renting device disclosed in the embodiment of the present application.
  • a data group call system is first introduced.
  • the system specifically includes a server 100 and a plurality of terminal groups 200 connected to the server 100.
  • terminal group 1, terminal group 2, ... terminal group M are used, and M is a non-zero natural number.
  • the following takes a terminal in a terminal group 200 as an example to describe the server 100 and the terminal in detail.
  • the structural relationship between As shown in FIG. 2, an Evolved Packet System (EPS) 300, a trunking control function (TCF) 400, and a trunking media function (TMF) 500 are provided between the server 100 and the terminal. .
  • EPS Evolved Packet System
  • TCF trunking control function
  • TMF trunking media function
  • the present application simplifies the process to the server 100 in the subsequent process.
  • the terminal broadcasts data information.
  • the feedback information sent by the terminal to the server 100 needs to pass through the EPS 300, the TCF 400, and the TMF 500 in order to reach the server 100.
  • the present application simplifies the process in the subsequent process to the terminal sends the server 100 to the server 100. Feedback.
  • the server 100 can send multiple data to the terminal group for a period of time.
  • the data group calling method of the present application is described in detail by taking one target data of the multiple data as an example.
  • the transmission process of other data is consistent with the transmission process of the target data, and the transmission process of the target data can be referred to.
  • the server 100 in the present application can acquire target data to be broadcast to the terminal group. Since the amount of data of the target data is large, the target data can be divided into N pieces of data for the convenience of transmission.
  • the specific segmentation process may be to preset a standard amount of data for each piece of data. For the target data, the target data is segmented based on the standard data amount, so that the data volume of most pieces of data is the standard data amount.
  • the target data set in this application is divided into N pieces of data, and N is a non-zero natural number.
  • the server 100 can assign a contiguous slice identification for each piece of data.
  • the data pieces sequentially assigned to the N data pieces are identified as 1, 2, 3, ..., N, and
  • a, b, c, ... the data slice identification may be determined according to specific circumstances, and is not limited herein.
  • the server Before the server transfers each piece of data, it first constructs a header for the target data.
  • the header includes the length of each piece of data and the number of pieces of data N as well as some descriptive language.
  • the terminal can use the information in the header in the process of receiving the data piece of the target data for subsequent processing.
  • the server 100 transmits one piece of data, in order to make the terminal know the related information of the piece of data, data piece information may be added for each piece of data, and the piece of information may include an identifier of the piece of data, a group identifier of the terminal group, and a target data identifier. And the number of data transmissions and so on.
  • the server merges the data piece and the data piece information together.
  • the target data can be regarded as a combination of a plurality of data piece objects.
  • the present application Based on the data group call system shown in FIG. 1, the present application provides a data group call method. It is applied to each terminal in one terminal group shown in FIG. 1. As shown in FIG. 3, the following steps are specifically included:
  • the following steps S301-303 are processes for determining that the current terminal loses the data slice identifier corresponding to the target data identifier.
  • Step S301 Receive a current data slice object including the target data identifier broadcast by the server.
  • the current data slice object broadcast by the server includes the current data piece and the current data piece information.
  • the current data piece information includes the current identifier of the current data piece, the group identifier of the server that is to send the target data to the terminal group, the target data identifier corresponding to the target data sent by the server, and the number of data transmission times. The following describes the role of each content.
  • the server sends the current data slice object in a broadcast manner, and therefore, all terminal groups can know the current data slice object.
  • Each terminal group receives the current data slice object after determining that the current data slice object is the transmission itself by using the group identity. If the terminal group uses the group identity to determine that the current data slice object is not sent to itself, the current data slice object is ignored. The specific determination process is not the focus of the application and will not be described in detail here.
  • the server can broadcast a plurality of data to the terminal group for a period of time, the target data is one of the data. Therefore, each terminal in the terminal group can determine, by using the target data identifier in the current data information, that the current data slice broadcast by the server is one piece of data of the target data, instead of the data piece of other data.
  • the subsequent data processing can then be performed using the target data identification, which will be described in detail in subsequent steps.
  • the terminal can determine the location of the current data piece in the target data and perform some other processing by the current identification of the current data piece. Other processing will be described in detail in the subsequent steps.
  • the terminal can determine, by the number of data transmissions in the current data slice object, that the server broadcasts the data piece for the first time. The terminal performs different processes for different data transmission times. If the number of data transmissions is expressed as the first time the current data piece is broadcast, step S302 is performed. If the number of data transmissions is expressed as not broadcasting the current data slice for the first time, other processing procedures are performed, and other processing procedures will be described in detail in the subsequent embodiments.
  • Step S302 When the number of data transmissions indicates that the server broadcasts the current data slice object for the first time, determining a history terminal lost data slice identifier corresponding to the target data identifier.
  • Step S303 Determine, by using the historical terminal loss data slice identifier and the current data slice object, that the current terminal loses the data slice identifier.
  • the current terminal lost data slice identifier corresponding to the target data identifier by using the current data slice object and the historical terminal lost data slice identifier corresponding to the target data identifier; wherein the historical terminal loses the data slice identifier And the current terminal lost data slice identifier is composed of the identifier of the lost data piece of the terminal.
  • the terminal can receive a plurality of data broadcast by the server, and each data can be represented by a data identifier.
  • the terminal stores a history terminal lost data slice identifier corresponding to each data identifier.
  • the meaning of the lost data slice identifier of the historical terminal is the identifier of all the lost data pieces of the terminal for the target data in the process of transmitting the target data.
  • the terminal may search for a historical terminal lost data slice identifier corresponding to the target data identifier in the storage space.
  • the historical terminal lost data slice identifier corresponding to the target data identifier a specific example will be described in detail below.
  • the identification of each piece of data is 1, 2, 3, 4, 5, and 6.
  • the current identifier of the current data slice is 6, it is assumed that the terminal has lost the data slice corresponding to the identifier 2 and the identifier 4 before, and the history terminal loses the data slice identifier as the identifier 2 and the identifier 4.
  • the historical terminal lost data slice identifier is first updated. In order for the terminal to know in time the latest situation of the lost piece of data.
  • Step S401 Determine whether the current data piece is accurately received. If yes, go to step S402, otherwise go to step S406.
  • the current data slice After receiving the current data slice object, the current data slice is extracted therefrom, and it is determined whether the current data slice is complete. Since the server is transmitting the current data slice, the MD5 code of the current data slice can be calculated and sent to the terminal along with the current data slice. After receiving the current data slice, the terminal still calculates the MD5 code of the received current data slice in the same manner.
  • the terminal determines that the MD5 code calculated by itself is consistent with the MD5 code sent by the server, it determines that the current data slice is correctly received, otherwise determines that the current data slice is not correctly received.
  • Step S402 Determine whether the current identifier and the historical identifier are consecutive. That is, comparing the current identifier of the current data piece with the historical identifier of the last correctly received data piece; wherein the identification of the N pieces of data of the target data on the server is continuous, and the server is in accordance with the continuous
  • the data slice identifier broadcasts each piece of data one by one to the terminal group.
  • the N data slice identifiers of the target data on the server are continuous.
  • the server broadcasts the data slices to the terminal, the data is also broadcasted one by one according to the continuous data slice identifier. For example, assume that N pieces of data are identified as 1, 2, ..., N. Then, the server sequentially sends the data slice object corresponding to the identifier 1, the data slice object corresponding to the identifier 2, and the data slice object corresponding to the identifier N.
  • the data slice object may not reach the terminal due to a problem with the transmission process. It has been lost.
  • this step determines the history identification of the last correctly received piece of data in the storage space. Then, the current identifier of the current data piece is compared with the historical identifier of the data piece that was correctly received last time. The purpose of the comparison is to determine whether the current identifier and the historical identifier are continuous, thereby determining whether there is a missing piece of data.
  • this step compares the identifier 6 with the identifier X, and determines whether the identifier X and the identifier 6 are continuous.
  • Step S403 If the current identifier is continuous with the historical identifier, it is determined that the data piece is not lost.
  • the server broadcasts the data slice object, it is broadcasted according to the continuous data piece identifier. Therefore, if the current identifier is continuous with the historical identifier, it is determined that the intermediate data piece is not lost between the current identifier and the historical identifier. Since the current data slice is also correctly received, it can be determined that the data slice is not lost during the current transmission of the current data slice. In this case, there is no need to update the history terminal to lose the slice identifier.
  • the identifier 5 is compared with the identifier 6 of the current data piece, and then the identifier 5 and the identifier are found. 6 is continuous, so it can be determined that no intermediate data pieces are lost between the identification 5 and the identification 6.
  • Step S404 If the current identifier is not continuous with the historical identifier, determine an intermediate identifier between the current identifier and the historical identifier as an intermediate lost data slice identifier.
  • the current identifier is not continuous with the historical identifier, it is determined that the current identifier is lost between the current identifier and the historical identifier. Lost intermediate data piece. Then, based on the current identifier and the historical identifier, one or more intermediate identifiers between the two are determined, and then the one or more intermediate identifiers are determined as the intermediate lost data slice identifier.
  • the identifier 3 is compared with the identifier 6 of the current data piece, and then the identifier 3 and the identifier are found. 6 is not continuous. Therefore, the intermediate identifier between the identifier 3 and the identifier 6 is determined: the identifier 4 and the identifier 5, so that the identifier 4 and the identifier 5 determine the intermediate lost data slice identifier.
  • Step S405 Update the intermediate lost data slice identifier to the historical terminal lost data slice identifier corresponding to the target data identifier, and determine a current terminal lost data slice identifier corresponding to the target data identifier.
  • the history terminal lost data slice identifier may be updated only by using the intermediate lost data slice identifier, and the updated historical terminal lost data slice identifier is determined as current. The terminal loses the data slice identifier.
  • the intermediate lost data slice identifier is the identifier 4 and the identifier 5
  • the historical terminal lost data slice identifier is the representation 2 and the identifier 4, and the identifier 4 in the intermediate lost data slice identifier is lost due to the loss of the data slice in the historical terminal.
  • the identifier 4 in the intermediate lost data slice identifier is lost due to the loss of the data slice in the historical terminal.
  • There is already in the identifier so there is no need to add the identifier 4 to the historical terminal lost data slice identifier; then the identifier in the middle lost data slice identifier 5. Since the history terminal has no data slice identifier, the identifier 5 needs to be added to the history terminal lost data slice identifier.
  • the current terminal lost data slice identifier obtained after updating the history terminal lost data slice identifier is the identifier 2, the identifier 4, and the identifier 5.
  • Step S406 In the case that it is determined that the current data piece is not correctly received, the current data piece is determined to be a lost data piece.
  • step S407 is performed.
  • Step S407 Determine whether the current identifier and the historical identifier are continuous. That is, comparing the current identifier of the current data piece with the historical identifier of the last correctly received data piece; wherein the identification of the N pieces of data of the target data on the server is continuous, and the server is in accordance with the continuous
  • the data slice identifier broadcasts each piece of data one by one to the terminal group. If yes, go to step S408, otherwise go to step S409.
  • step S402. The execution process of this step is the same as that of step S402. Reference may be made to the above content, and details are not described herein again.
  • Step S408 If the current identifier is continuous with the historical identifier, update the current identifier of the current data slice to the historical terminal lost data slice identifier corresponding to the target data identifier, and determine the target data. The current terminal loses the data slice identifier corresponding to the identifier.
  • the current identifier is continuous with the historical identifier, it is determined that there is no missing piece of data between the current identifier and the historical identifier. In this case, the current identifier of the current data slice is directly updated to the history terminal lost data slice identifier.
  • Step S409 If the current identifier is not continuous with the historical identifier, determine an intermediate identifier between the current identifier and the historical identifier as an intermediate lost data slice identifier.
  • the identifier of the missing data piece is determined.
  • the specific execution process may refer to step S404, and details are not described herein.
  • Step S410 Update the current data slice and the intermediate lost data slice identifier to a historical terminal lost data slice identifier corresponding to the target data identifier, and determine a current terminal lost data slice corresponding to the target data identifier.
  • the current identifier of the current data piece and one or more intermediate identifiers in the intermediate lost data piece identifier are updated to the historical terminal lost data. Just in the tablet logo.
  • step S304 determining the history server lost data slice identifier corresponding to the target data identifier.
  • the history server lost data slice identifier is an identifier that the server last broadcasts to each terminal of the terminal group, and the server knows that the target data has lost data slices.
  • the server may collect the data slice identifiers that have been lost by each terminal, and then summarize the data slice identifiers that have been lost by each terminal, so as to represent the history server loss data of the data slice identifier that the server knows that the target data is currently lost. Slice identification.
  • the terminal may search for a history server lost data slice identifier corresponding to the target data identifier in the storage space.
  • a history server lost data slice identifier corresponding to the target data identifier in the storage space.
  • the identification of each piece of data is 1, 2, 3, 4, 5, and 6. If the current identifier of the current data slice is 6, it is assumed that each terminal known by the server has lost the data slice of the identifier 1, the identifier 2, and the identifier 3, and the history server loses the data slice identifier as the identifier 1, the identifier 2, and the identifier 3. of.
  • the terminal can compare the current terminal lost data slice identifier with the historical server lost data slice identifier stored by the terminal.
  • the history server lost data slice identifier stored by the terminal is the last time that the server broadcasts to the terminal. Therefore, the history server stored on the terminal loses the data slice identifier, that is, the historical server lost data slice identifier stored on the server.
  • Step S305 Determine, in the current terminal lost data slice identifier, a missing data slice identifier that is not included in the history server lost data slice identifier.
  • the current terminal lost data slice identifier is compared with the history server lost data slice identifier. If the history server lost data slice identifier includes the current terminal lost data slice identifier, the server does not miss the lost data slice identifier; if the history server loses the data slice If the identifier does not contain the current terminal lost data slice identifier, the server misses the lost data slice identifier.
  • the data piece that the historical server lost data slice identifier does not have is determined, and the data pieces are missing pieces of data missing on the server, so the data pieces are referred to as missing data piece identifiers. .
  • the history server lost data slice identifier is identified by the identifier 1, the identifier 2, and the identifier 3.
  • the current terminal lost data slice identifier is the identifier 2, the identifier 4, and the identifier 5.
  • the identifier 4 and the identifier 5 have the current terminal lost data slice identifier, and the calendar
  • the history server is missing in the data slice ID. Therefore, the identification 4 and the identification 5 are determined as missing data piece identifications.
  • Step S306 If the number of identifiers in the missing data slice identifier is greater than a feedback threshold, send the missing data slice identifier to the server, where the feedback threshold is at least 1 and less than N.
  • the history server lost data slice identifier includes the current terminal lost data slice identifier, that is, the missing data slice identifier is an empty set, all the data slice identifiers that have been lost on the terminal are all known by the server. In this case, it indicates that the history server lost data slice identifier on the server should be relatively accurate, so the terminal does not need to send the missing data slice identifier to the server.
  • the missing data slice identifier is not an empty set, it means that some data slices (data slices in the missing data slice identifier) of all the data pieces that have been lost on the terminal are missing.
  • the terminal can send the missing data to the server.
  • Slice ID to update the missing data slice ID of the existing history server on the server.
  • this step by determining whether the missing data slice identifier is an empty set, it is possible to filter a part of the terminal whose missing data slice is identified as an empty set, thereby reducing the number of terminals that send a lost data piece to the server.
  • the feedback threshold is at least 1 and less than N, and the specific value may be determined according to a specific situation, and is not limited herein.
  • the terminal only works if the number of identifiers in the missing data slice identifier is greater than the feedback threshold. Send the missing data slice ID to the server. Since the number of missing data slices may be more than the number of non-empty sets, the number of missing identifiers of the data slice identifier is greater than the number of terminals with feedback thresholds. Therefore, by setting the feedback threshold, it is possible to filter out most of the terminals whose number of identifiers of the missing data slice is not greater than the feedback threshold. Therefore, the number of terminals that send the missing data slice identifier to the server is greatly reduced.
  • the terminal 1 may not send the identifier 1 to the server because the number of identifiers is not greater than the feedback threshold; however, the terminal 2 may send the identifier 1 to the server because the number of identifiers is greater than the feedback threshold, so the server can still know the data of the identifier 1 The piece has been lost.
  • the data group calling method provided by the present application compares the current terminal lost data slice identifier with the historical server lost data slice identifier, and determines a data slice identifier that is existing on the terminal but not on the server, and the data slice identifier is on the server. Missing data slice identifiers of all lost data slices, referred to as missing data slice identifiers.
  • a feedback threshold may be set for the terminal.
  • the server is sent to the server.
  • the missing data slice identifier is sent.
  • the missing data slice identifier is not sent to the server.
  • the server may update the existing history server lost data slice identifier according to the missing data slice identifier sent by the terminal in the terminal group. And get the current server lost data slice identifier. Since the server data slice identifier on the server has been changed from the history server lost data slice identifier to the current server lost data slice identifier, the server can re-advertise the current server lost data slice identifier to each terminal of the terminal group.
  • Step S501 Receive a current server lost data slice identifier broadcast by the server, where the current server lost data slice identifier is that the server uses the missing data slice identifier sent by the terminal in the terminal group to update an existing server
  • the history server obtains the data slice identifier.
  • the server may broadcast the current server lost data slice identifier to the terminal in the embodiment shown in FIG. 3, and the terminal may receive the current server lost data slice identifier.
  • Step S502 Compare the current terminal lost data slice identifier with the current server lost data slice identifier, and determine, in the current terminal lost data slice identifier, that the current server lost data slice identifier does not have an omission. Data slice identification.
  • the history server lost data slice identifier is changed to the current server lost data slice identifier. It can be understood that the missing data slice identifier on the terminal will also change. Therefore, the current terminal lost data slice identifier is compared with the current server lost data slice identifier, thereby re-determining the missing data slice identifier of the terminal. For details, refer to the detailed description of step S303, and details are not described herein again.
  • Step S503 determining whether the number of identifiers in the missing data slice identifier is greater than a feedback threshold, and if yes, proceeding to step S504; otherwise, proceeding to step S505.
  • the missing data slice identifier may also change, the number of identifiers may change at any time. Therefore, it is re-determined whether the number of identifiers in the missing data slice identifier is greater than the feedback threshold.
  • Step S504 If the number of identifiers in the missing data slice identifier is greater than the feedback threshold, send the missing data slice identifier to the server, and proceed to step S501.
  • the missing data slice identifier is sent to the server.
  • the server may re-receive the missing data slice identifier sent by the terminal in the terminal group, and re-determine the current server lost data slice identifier according to the terminal in the terminal group, and then proceeds to step S501 to repeatedly perform the foregoing process until the terminal group has no terminal to the server. Send missing data slice ID.
  • Step S505 Update the history server lost data slice identifier stored by the terminal by using the current server lost data slice identifier.
  • the process of the terminal losing the data slice identifier to the current server is completed, and the current service can be utilized.
  • the server loses the data slice identifier and updates the history server lost data slice identifier that the terminal has stored for the execution of the next loop process.
  • the embodiment shown in FIG. 3 to FIG. 5 is a related process of the server transmitting the current data slice object to the terminal. It can be understood that the server sends each data slice object to the terminal, and the terminal processes according to the process shown in FIG. 3 to FIG. 5 until all the data piece objects of the server sending the target data are sent.
  • the current terminal lost data slice identifier on the terminal is constantly changing, and at the same time, the current server data slice object on the server is also constantly changing. .
  • the server can broadcast the existing server lost data slice identifier to the terminal group again.
  • the following describes the process in which the terminal receives the lost data slice identifier of the existing server.
  • Step S601 After receiving all the data piece objects of the target data, the receiving server loses the data slice identifier to the existing server broadcasted by each terminal of the terminal group; wherein the existing server loses the data piece identifier as After the server broadcasts all the data slice objects, the service The server knows the data slice identifier of all the lost data pieces of the target data.
  • step S301 The detailed execution process is similar to the step S301. For details, refer to step S301, and details are not described herein again.
  • Step S602 comparing the existing lost data slice identifier with the existing server lost data slice identifier, and determining, in the existing terminal lost data slice identifier, that the existing server lost data slice identifier does not have Missing the data slice identifier; wherein the existing terminal lost data slice identifier is a data slice identifier determined by the terminal after all the data slice objects are received, and all lost data slices are determined.
  • step S303 The detailed execution process is similar to the step S303. For details, refer to step S303, and details are not described herein again.
  • Step S603 If the missing data slice identifies a non-empty set, send the missing data slice identifier to the server, and determine, by the server, a final server data slice identifier.
  • This step is different from the embodiment shown in FIG. 3, in this step, it is determined whether the missing data slice identifier is an empty set, instead of determining whether the number of identifiers of the missing data slice identifier is greater than a feedback threshold.
  • the purpose of this is to send all the missing data slices on the terminal to the server, so that the server finally accurately summarizes the lost data pieces of each terminal without missing some data slice identifiers due to the limitation of the feedback threshold. .
  • the probability that the server still misses the data slice identifier is low, so the missing data slice identifier of the terminal that does not have a large number of terminals at this time is still a non-empty set, that is, no More terminals appear to send missing data slice identifiers to the server again, so the process does not cause the server to be unavailable.
  • the server may receive the missing data slice identifier sent by the terminal again, update the existing server lost data slice identifier by using the missing data slice identifier, and obtain the final server data slice identifier.
  • the meaning of the final server data slice identifier is that during the first target data transmission process, each A summary of the data slice IDs of all lost pieces of data for the terminal.
  • the data slice object corresponding to the data slice identifier included in the final data slice identifier may be retransmitted, so that each terminal may re-receive the data slice object to complete the receiving target data. the goal of.
  • the process of the terminal re-receiving the data slice object includes the following steps:
  • Step S701 Receive a missing data slice object that is broadcasted by the server according to the final server data piece identifier, where the missing data slice object includes a missing data piece, a missing data piece identifier, a group identifier of the terminal group, and a target. Data identification and number of data transfers.
  • the terminal receives a missing data slice object, and the specific process may refer to step S301, and details are not described herein again. Different from step S301, the number of data transmissions in the missing data slice identifier is not the first time. Therefore, step S302 is no longer performed, but step S702 is performed.
  • Step S702 If the number of data transmissions indicates that the server does not broadcast the current data slice object for the first time, determine whether the existing terminal lost data slice identifier includes the missing data slice identifier.
  • the server sends a identifier corresponding to the missing data slice identifier, because the identifier of the missing data slice of each terminal (that is, the missing data slice identifier) is included in the final server data slice identifier, and the data pieces that have been lost by each terminal may be different. Missing the data slice object, it may be that the terminal has lost the data piece, and may not be the data piece that the terminal has lost.
  • the terminal After receiving the missing data piece object, the terminal first determines whether the missing identifier of the missing data piece is lost in the data piece identifier of the existing terminal of the terminal itself; if yes, it indicates that the missing data piece object is indeed lost by itself, and enters Step S703; otherwise, indicating that it is already in the first
  • the process of transmitting the target data at one time correctly receives the missing data slice object, and therefore, it is not necessary to repeatedly receive the missing data slice object.
  • Step S703 If the existing terminal lost data slice identifier includes the missing data slice identifier, the missing data slice object is received.
  • the missing data slice object is indeed lost by itself, the missing data slice object is received. Then verify that the missing piece of data is received correctly.
  • Step S704 If the missing data slice object is correctly received, deleting the missing data slice identifier in the existing terminal lost data slice identifier.
  • the missing data piece identifier may be deleted in the existing terminal lost data piece identifier, so that the existing terminal loses the data slice identifier and is always composed of the data slice identifier that the terminal has lost.
  • Step S705 Determine whether the existing terminal lost data slice identifier is an empty set. If yes, go to step S706, otherwise go to step S707.
  • step S701 If the existing lost data slice identifier is not an empty set, the process proceeds to step S701 to continue receiving the missing data slice identifier sent by the server. Repeat the above process until the server sends the missing data slice object.
  • Step S706 If the existing terminal lost data slice identifier is an empty set, release the session connection with the server.
  • the lost data slice identifier of the existing terminal After correctly receiving the missing data slice object and deleting the missing data slice identifier, it is determined whether the lost data slice identifier of the existing terminal is an empty set. If it is already an empty set, it indicates that the terminal has completely received the target data, and may release the target data at this time.
  • the server connection does not have to continue to receive subsequent missing data slice objects, and can perform other processing.
  • the server can clear the existing server lost data slice identifier. If, after the execution of the process described in FIG. 7 , there are still some terminals whose existing terminal loses the data slice identifier as a non-empty set, each terminal may send the existing terminal lost data slice identifier to the server again.
  • the server again loses the data slice identifier as the existing server according to the union of the lost data slice identifiers of the existing terminals that have been sent by the respective terminals. Then, the embodiment shown in Fig. 7 is re-executed so that each terminal receives the missing piece of data again.
  • the server in order to prevent the terminal from maliciously attacking the server, that is, maliciously sending the missing data piece to the server continuously, the server will continue to execute the execution process shown in FIG. 7, thereby occupying a lot of resources of the server.
  • the server can set the number of retransmissions to indicate the upper limit of the number of executions shown in FIG. The number of retransmissions may be determined on a case-by-case basis and is not limited herein.
  • the server performs the execution process shown in FIG. 7 at most three times. After that, even if the existing server lost data slice identifier is still not an empty set, the server will not retransmit the data slice object to prevent malicious attacks on the terminal.
  • FIG. 7 shows the execution process on the terminal side. The following describes the execution process of the server.
  • the server first acquires the target data to be broadcast, then divides the target data into N pieces of data, and assigns a continuous piece of data identification for each piece of data.
  • Step S801 Broadcast a current data slice object corresponding to a current data piece in the target data, where the current data slice object includes a current data piece, a current identifier of the current data piece, a group identifier of the terminal group, and target data.
  • Step S802 Receive a missing data slice identifier sent by multiple terminals in the terminal group, where the missing data slice identifier is used by the terminal to determine that the number of identifiers in the missing data slice identifier is greater than a feedback threshold value.
  • the server sends; the feedback threshold is at least 1 and less than N.
  • the missing data slice is identified as a missing data slice that is not included in the history server lost data slice identifier determined in the current terminal lost data slice identifier; the current terminal lost data slice identifier is The current data slice object is updated with the historical terminal lost data slice identifier corresponding to the target data identifier; the historical terminal lost data slice identifier and the current terminal lost data slice identifier are all identified by the terminal lost data piece identifier
  • the historical server lost data slice identifier is that the server last broadcasts to each terminal of the terminal group, and the server knows that the target data has lost the identifier of the data piece.
  • the server may update its own historical server lost data slice identifier, and update the historical server lost data slice identifier stored on the terminal. As shown in FIG. 9, the following steps are specifically included:
  • Step S901 The missing data piece identifier sent by the terminal in the terminal group is updated. Some of the history servers lose the data slice identifier and obtain the current server lost data slice identifier.
  • the server can update the existing history server lost data slice identifier by using the missing data slice identifier of each terminal.
  • the specific update process may be: performing, for each missing data slice identifier in each missing data slice identifier, the following process, determining whether the lost data slice identifier of the history server includes the missing data slice identifier, and if not, adding to the existing history server is not required to be lost. In the data slice identifier, if it is not included, it is added to the lost data slice identifier of the existing history server.
  • the updated existing server lost data slice identifier is determined as the current server lost data slice identifier.
  • Step S902 Broadcast the current server lost data slice identifier.
  • the server may broadcast the current server lost data slice identifier to the terminal group.
  • Each terminal can execute the embodiment shown in FIG. 5, thereby achieving the purpose of updating the historical server lost data slice identifier stored on the terminal.
  • FIG. 5 For a specific process, reference may be made to the embodiment shown in FIG. 5, and details are not described herein again.
  • Step S903 The above steps are repeatedly performed until all the data slice objects of the target data are broadcasted.
  • the server may broadcast the data slice object to the terminal again. After receiving the missing data slice identifier sent by the terminal, step S901 and step S902 are repeatedly performed until the server sends all the data slice objects.
  • Step S904 The current server loses the data slice identifier after all the data slice objects of the target data are broadcast, and determines that the existing server loses the data slice identifier.
  • the current server lost data slice identifier on the server is a summary of the identifiers of the data slices that are known by the server and each terminal has lost. Therefore, these data slice identifiers can be determined as existing server lost data slice identifiers.
  • the process of checking for the missing fill can be performed. As shown in FIG. 10, the following steps are specifically included:
  • Step S1001 Broadcast the existing server lost data slice identifier.
  • Step S1002 Receive a missing data slice identifier sent by the terminal in the terminal group in a preset time; wherein the missing data slice identifier is that the terminal loses the data slice identifier of the existing terminal and the lost data piece of the existing server. And identifying, in the existing terminal lost data slice identifier, the missing data piece that the existing server loses the data slice identifier does not have; and the missing data slice identifies a non-empty set; The terminal lost data slice is identified as the terminal has determined that the data slice has been lost after receiving all the data slice objects;
  • Step S1003 Update the lost data piece identifier of the existing server by using the missing data slice identifier sent by the terminal in the terminal group, and obtain the final server data slice identifier.
  • the data slice object corresponding to the data slice identifier included in the final data slice identifier may be retransmitted, so that each terminal may re-receive the data slice object to complete the receiving target data. the goal of.
  • the process of the server rebroadcasting the data slice object includes the following steps:
  • Step S1101 Broadcast the missing data slice object one by one according to the final server data slice identifier; wherein the missing data slice object includes a missing data slice, a missing data slice identifier, and the The group ID, target data ID, and number of data transmissions of the terminal group.
  • Step S1102 After the data pieces identified by the final server data piece are all broadcasted, the final server data piece identifier is cleared;
  • Step S1103 Receive an existing terminal lost data slice identifier sent by the terminal in the terminal group, where the terminal sends the existing terminal to the server if it determines that the existing terminal loses the data slice identifier and is not an empty set. There is a terminal missing data slice identifier.
  • Step S1104 Re-determine the final server data slice identifier by using the existing terminal lost data slice identifier sent by the terminal in the terminal group.
  • Step S1105 The above steps are repeatedly performed until the final server data slice is identified as an empty set, or the number of data transmissions reaches a specified number of retransmissions.
  • a retransmission technique is added to the server, so that the accuracy of data transmission can be improved.
  • the present application provides a data group call system, including a server 100 and a plurality of terminal groups 200 connected to the server 100.
  • the terminal group is configured to perform the data group calling method according to any one of FIG. 3-7;
  • the server is configured to perform the data group calling method according to any one of FIG. 8 to FIG.
  • the application provides a terminal, including:
  • the first processor 1201 is configured to determine a current terminal lost data slice identifier and a history server lost data slice identifier corresponding to the target data identifier, and determine, in the current terminal lost data slice identifier, the historical server lost data slice identifier Missing data slice identifier; If the number of identifiers in the missing data slice identifier is greater than a feedback threshold, sending the missing data slice identifier to the communication module;
  • the first communication module 1202 is configured to send the missing data slice identifier to the server.
  • the application further provides a server, including:
  • the second communication module 1301 is configured to receive a missing data slice identifier corresponding to the target data identifier sent by the terminal;
  • the second processor 1302 is configured to use the missing data slice identifier sent by the terminal in the terminal group, update the history server lost data slice identifier, and obtain the current server lost data slice identifier; and control the communication module to broadcast the current server loss.
  • Data slice identification repeat the above steps until the data slice object containing the target data identifier is broadcast.
  • the present application provides a data group calling device, which includes:
  • the first determining unit 121 is configured to determine a current terminal lost data slice identifier and a history server lost data slice identifier corresponding to the target data identifier;
  • the second determining unit 122 is configured to determine, in the current terminal lost data slice identifier, a missing data slice identifier that is not included in the history server lost data slice identifier;
  • the sending unit 123 is configured to send the missing data slice identifier to the server if the number of identifiers in the missing data slice identifier is greater than a feedback threshold.
  • the present application provides a data group calling device, including:
  • the receiving unit 131 is configured to receive the missing data slice identifier corresponding to the target data identifier sent by the terminal, update the history server lost data slice identifier by using the missing data slice identifier sent by the terminal in the terminal group, and obtain the current server lost data.
  • the broadcasting unit 132 is configured to broadcast the current server lost data slice identifier.
  • the functions described in the method of the present embodiment can be stored in a computing device readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, a portion of the embodiments of the present application that contributes to the prior art or a portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a
  • the computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本申请提供了一种数据组呼方法、装置及系统,其中方法包括:确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识。本申请可以保证服务器不会接收过多反馈信息而不可用。这样,便可以在服务器上采用数据重传思想来保证数据准确性。

Description

一种数据组呼方法、装置及系统 技术领域
本申请涉及通信技术领域,尤其涉及一种数据组呼方法、装置及系统。。
背景技术
伴随着科学技术的迅速发展,集群业务从窄带走向宽带,带宽方面的限制大大减弱,因此数据组呼技术迅速发展。数据组呼的通常实现方式为服务器通过宽带向一组终端广播同一数据,以实现一组终端接收同一数据的目的。
可是,在服务器向一组终端广播数据的情况下,数据在传输过程中可能会丢失。由于服务器与各个终端之间的传输路径可以不同,所以针对一个终端而言,若在服务器与该终端之间的数据传输过程未出现问题,则该终端可以正确接收数据;若该服务器与该终端之间的数据传输过程出现问题,则该终端可能无法正确接收数据。因此,针对服务器向一组终端广播的同一数据的过程而言,一些终端可以正确接收数据,一些终端可能无法正确接收数据。
所以在传输可靠性较高的数据过程中,目前的数据组呼技术无法保证数据传输的准确性,进而导致一些终端无法正常接收并使用数据。
发明内容
本申请发明人在研究过程中发现可以利用重传思想来保证数据准确性。
重传思想具体而言为:当一个终端无法正确接收服务器的数据时,终 端可以向服务器发送反馈信息,反馈信息包括丢失数据标识。服务器可以根据反馈信息向终端再次广播与丢失数据标识对应的数据,以便终端可以再次接收数据,从而保证数据准确性。
但是,针对目前数据组呼系统而言,一组终端中的终端数量较多。若各个终端均向服务器广播反馈信息,则聚集到服务器上的反馈信息则会非常多。服务器会因为无法处理过多的反馈信息而不可用,进而导致服务器出现拒绝服务的严重后果。基于此,目前的数据组呼技术的协议未具有重传定义。
为此,本申请提供了一种数据组呼方法,以便达到在不引起服务器不可用的前提下使服务器达到重传数据的目的,进而提高数据传输的准确性。
本申请提供了以下技术手段:
一种数据组呼方法,包括:
确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;
在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;
在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识。
优选的,在所述目标数据标识对应的数据片被划分为N个数据片的情况下,则所述反馈门限值大于或等于1,并且小于N。
优选的,所述确定与目标数据标识对应的当前终端丢失数据片标识,包括:
接收所述服务器广播的、包含目标数据标识的当前数据片对象;
在所述服务器第一次广播所述当前数据片对象的情况下,确定与所述目标数据标识对应的历史终端丢失数据片标识;
利用所述历史终端丢失数据片标识和所述当前数据片对象,确定所述当前终端丢失数据片标识。
优选的,所述利用所述历史终端丢失数据片标识和所述当前数据片对象,确定所述当前终端丢失数据片标识,包括:
在判定所述当前数据片对象正确接收的情况下,则将所述当前数据片对象对应的当前标识与上一次正确接收数据片对象的历史标识进行对比;
若所述当前标识与所述历史标识连续,则将所述历史终端丢失数据片标识确定为当前终端丢失数据片标识;
若所述当前标识与所述历史标识不连续,则将所述当前标识与所述历史标识之间的所有中间标识,确定为中间丢失数据片标识;
将所述中间丢失数据片标识更新至所述历史终端丢失数据片标识中,并将更新后的历史终端丢失数据片标识、确定为当前终端丢失数据片标识。
优选的,所述利用所述历史终端丢失数据片标识和所述当前数据片对象,确定所述当前终端丢失数据片标识,包括:
在判定所述当前数据片对象未正确接收的情况下,将所述当前数据片对象对应的当前标识确定为已丢失数据片标识;
将所述当前数据片对象对应的当前标识与上一次正确接收数据片对象的历史标识进行对比;
若所述当前标识与所述历史标识连续,则将已丢失数据片标识更新至 述历史终端丢失数据片标识中,并将更新后的历史终端丢失数据片标识、确定为当前终端丢失数据片标识;
若所述当前标识与所述历史标识不连续,则将所述当前标识与所述历史标识之间的所有中间标识,确定为中间丢失数据片标识;
将所述中间丢失数据片标识和已丢失数据片标识、更新至所述历史终端丢失数据片标识中,并将更新后的历史终端丢失数据片标识、确定为当前终端丢失数据片标识。
优选的,在向服务器发送所述遗漏数据片标识之后,还包括:
接收所述服务器广播的当前服务器丢失数据片标识;
再次在所述当前终端丢失数据片标识中,确定出所述当前服务器丢失数据片标识所不具有的遗漏数据片标识;
在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识;
重复执行上述步骤直到所述遗漏数据片标识中的标识数量不大于所述反馈门限值。
优选的,还包括:
在服务器将包含目标数据标识的数据片对象发送完毕后,在已有终端丢失数据片标识中、确定所述已有服务器丢失数据片标识所不具有的遗漏数据片标识;若所述遗漏数据片标识非空集,则将所述遗漏数据片标识发送至所述服务器,由所述服务器确定最终服务器数据片标识。
优选的,还包括:
接收所述服务器依据所述最终服务器数据片标识逐个广播的遗漏数据 片对象;
在所述服务器非第一次广播所述当前数据片对象的情况下,判断所述已有终端丢失数据片标识是否包含所述遗漏数据片标识;
若所述已有终端丢失数据片标识包含所述遗漏数据片标识,则接收所述遗漏数据片对象;
若所述遗漏数据片对象正确接收的情况下,则在所述已有终端丢失数据片标识中删除所述遗漏数据片标识;
在所述最终服务器数据片标识的所述数据片均广播完毕之后,判断所述已有终端丢失数据片标识是否为空集;
若所述已有终端丢失数据片标识为空集,则释放与所述服务器的会话连接;
若所述已有终端丢失数据片标识不为空集,则进入接收所述服务器依据所述最终服务器数据片标识逐个广播的遗漏数据片对象的步骤,直到服务器将遗漏数据片对象发送完毕。
一种数据组呼方法,应用于数据组呼系统的服务器所述方法包括:
接收终端发送的与目标数据标识对应的遗漏数据片标识;
利用所述终端组中的终端发送的遗漏数据片标识,更新历史服务器丢失数据片标识,并获得当前服务器丢失数据片标识;
广播所述当前服务器丢失数据片标识;
重复执行上述步骤直到包含目标数据标识的数据片对象均广播完毕。
优选的,在所述目标数据的所有数据片对象均广播完毕之后,还包括:
广播已有服务器丢失数据片标识;
在预设时间内接收终端发送的遗漏数据片标识;
利用所述遗漏数据片标识更新所述已有服务器丢失数据片标识,并获得最终服务器数据片标识。
优选的,还包括:
依据所述最终服务器数据片标识逐个广播遗漏数据片对象;在所述最终服务器数据片标识的所述数据片均广播完毕之后,清空所述最终服务器数据片标识;
接收终端发送的已有终端丢失数据片标识;
利用所述终端组中的终端发送的已有终端丢失数据片标识,重新确定所述最终服务器数据片标识;
重复执行以上步骤直到所述最终服务器数据片标识为空集,或者,所述数据传输次数到达指定重发次数。
优选的,本申请还提供一种终端,包括:
第一处理器,用于确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;并在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向通信模块发送所述遗漏数据片标识;
第一通信模块,用于向所述服务器发送所述遗漏数据片标识。
优选的,本申请还提供一种服务器,包括:
第二通信模块,用于接收终端发送的与目标数据标识对应的遗漏数据片标识;
第二处理器,用于利用所述终端组中的终端发送的遗漏数据片标识,更新历史服务器丢失数据片标识,并获得当前服务器丢失数据片标识;并控制通信模块广播所述当前服务器丢失数据片标识;重复执行上述步骤直到包含目标数据标识的数据片对象均广播完毕。
一种数据处理系统,包括:
服务器和与所述服务器相连的多个终端组;
所述服务器,用于执行上述的数据组呼方法;
每个终端组中的终端,用于上述数据组呼方法。
一种数据组呼装置,包括:
第一确定单元,用于确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;
第二确定单元,用于在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;
发送单元,用于在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识。
一种数据组呼装置,包括:
接收单元,用于接收终端发送的与目标数据标识对应的遗漏数据片标识;利用所述终端组中的终端发送的遗漏数据片标识,更新历史服务器丢失数据片标识,并获得当前服务器丢失数据片标识;
广播单元,用于广播所述当前服务器丢失数据片标识。
通过以上技术内容,可以看出本申请具有以下有益效果:
本申请提供的数据组呼方法,将当前终端丢失数据片标识与历史服务 器丢失数据片标识进行对比,并确定终端上已有的而服务器上不具有的数据片标识,该数据片标识即服务器上遗漏的所有已丢失数据片的数据片标识,简称遗漏数据片标识。
为了防止服务器因无资源来处理过多的遗漏数据片标识而不可用,可以为终端设定一个反馈门限值,在终端的遗漏数据片标识中的标识数量大于反馈门限值时,向服务器发送遗漏数据片标识,在终端的遗漏数据片标识中的标识数量不大于反馈门限值时,不向服务器发送遗漏数据片标识。
这样,可以降低多个终端同时向服务器反馈遗漏数据片标识的概率,从而保证服务器不会接收过多反馈信息而不可用。这样,便可以在服务器上采用数据重传思想来保证数据准确性。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请实施例公开的一种数据组呼系统的结构示意图图;
图2为本申请实施例公开的一种数据组呼系统中服务器与终端的结构示意图;
图3为本申请实施例公开的数据租呼方法的流程图;
图4为本申请实施例公开的又一数据租呼方法的流程图;
图5为本申请实施例公开的又一数据租呼方法的流程图;
图6为本申请实施例公开的又一数据租呼方法的流程图;
图7为本申请实施例公开的又一数据租呼方法的流程图;
图8为本申请实施例公开的又一数据租呼方法的流程图;
图9为本申请实施例公开的又一数据租呼方法的流程图;
图10为本申请实施例公开的又一数据租呼方法的流程图;
图11为本申请实施例公开的又一数据租呼方法的流程图;
图12为本申请实施例公开的一种终端的示意图;
图13为本申请实施例公开的一种服务器的示意图;
图14为本申请实施例公开的一种数据租呼装置的结构示意图;
图15为本申请实施例公开的又一数据租呼装置的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
为了方便本领域技术人员更加清楚了解本申请的应用场景,在介绍本申请的实施例之前,首先介绍一种数据组呼系统。如图1所示,所述系统具体包括服务器100和与所述服务器100相连的多个终端组200。图示中采用终端组1、终端组2……终端组M表示,M为非零自然数。
下面以一个终端组200中一个终端为例,详细介绍服务器100与终端 之间的结构关系。如图2所示,在服务器100与终端之间具有演进型分组系统(Evolved Packet System,EPS)300、集群控制单元(Trunking Control Function,TCF)400和集群媒体单元(Trunking Media Function,TMF)500。
可以理解的是,服务器100向终端广播的数据信息,需要经过依次经过TMF 500、TCF 400和EPS 300才能够到达终端;为了方便后续描述,本申请在后续过程中将此过程简化为服务器100向终端广播数据信息。同理,终端向服务器100发送的反馈信息,需要经过依次经过EPS 300、TCF400和TMF 500才能够到达服务器100;为了方便后续描述,本申请在后续过程中将此过程简化为终端向服务器100发送反馈信息。
服务器100可以在一段时间内向终端组发送多个数据,本申请以多个数据中一个目标数据为例,对本申请的数据组呼方法进行详细描述。其它数据的传输过程与目标数据的传输过程是一致的,可以参考目标数据的传输过程。
本申请中服务器100可以获取待广播至终端组的目标数据。由于目标数据的数据量较大,为了方便传输可以将目标数据切分成N个数据片。具体切分过程可以为预先设定每个数据片的标准数据量。针对目标数据而言,以标准数据量为依据对目标数据实施切分,以使得大部分数据片的数据量均为标准数据量。为了方便后续叙述,本申请设定目标数据切分为N个数据片,N为非零自然数。
为了方便后续处理,服务器100可以为每个数据片分配连续的数据片标识。例如,为N个数据片依次分配的数据片标识为1、2、3……N,又 如,a、b、c……,数据片标识可以根据具体情况而定,在此不做限定。
服务器在传输每个数据片之前,首先会构建一个目标数据的包头。包头包括每个数据片长度和数据片数量N以及一些描述性语言。终端可以在接收目标数据的数据片的过程中使用包头中的信息,进行后续处理。
服务器100每次传输一个数据片,为了使得终端得知数据片的相关信息,可以为每个数据片添加数据片信息,数据片信息可以包括数据片的标识、终端组的组标识、目标数据标识和数据传输次数等内容。服务器将数据片和数据片信息合并在一起,为了便于称呼后续简称数据片对象,那么目标数据可以看作是多个数据片对象的组合。
服务器100每次向终端组广播目标数据中一个数据片对象,那么在经过多次传输之后,便可以将目标数据所有数据片均广播至终端组。
下面详细介绍终端组中各个终端和服务器的传输目标数据的过程。首先介绍终端组中各个终端的处理过程。
基于图1所示的数据组呼系统,本申请提供了一种数据组呼方法。应用于图1所示的一个终端组中的各个终端。如图3所示,具体包括以下步骤:
下述步骤S301-303为确定与目标数据标识对应的当前终端丢失数据片标识的过程。
步骤S301:接收所述服务器广播的包含目标数据标识的当前数据片对象。
服务器广播的当前数据片对象中包括当前数据片和当前数据片信息。 当前数据片信息包括当前数据片的当前标识、服务器旨在将目标数据发送至终端组的组标识、服务器发送的目标数据对应的目标数据标识和数据传输次数等内容。下面一一介绍各个内容的作用。
针对终端组的组标识而言,由于数据组呼系统中具有多个终端组,服务器以广播地方式发送当前数据片对象,因此,所有终端组均可以得知当前数据片对象。每个终端组在利用组标识确定当前数据片对象是发送自身之后,从而接收当前数据片对象。若终端组利用组标识确定当前数据片对象不是发送至自身的,从而忽略当前数据片对象。具体确定过程不是申请的重点,在此不再详述。
针对目标数据标识而言,由于服务器可以在一段时间内向终端组广播多个数据,目标数据为其中一个数据。因此,终端组中各个终端可以通过当前数据信息中的目标数据标识,来确定服务器广播的当前数据片为目标数据的一个数据片,而不是其它数据的数据片。然后,可以利用目标数据标识来执行后续处理过程,在后续步骤中将进行详细说明。
针对当前标识而言,终端可以通过当前数据片的当前标识来确定当前数据片在目标数据中的所处位置并执行一些其它处理。其它处理过程将在后续步骤中进行详细说明。
针对数据传输次数而言,终端可以通过当前数据片对象中的数据传输次数来确定服务器为第几次广播该数据片。针对不同的数据传输次数,终端会执行不同的处理过程。若数据传输次数表示为第一次广播当前数据片,则执行步骤S302。若数据传输次数表示为非第一次广播当前数据片,则执行其它处理过程,其它处理过程将在后续实施例中进行详细描述。
步骤S302:在所述数据传输次数表示所述服务器第一次广播所述当前数据片对象的情况下,确定与所述目标数据标识对应的历史终端丢失数据片标识。
步骤S303:利用所述历史终端丢失数据片标识和所述当前数据片对象,确定所述当前终端丢失数据片标识。
利用所述当前数据片对象和与所述目标数据标识对应的历史终端丢失数据片标识,重新确定与所述目标数据标识对应的当前终端丢失数据片标识;其中,所述历史终端丢失数据片标识和所述当前终端丢失数据片标识,均由该终端已丢失数据片的标识组成。
终端可以接收服务器广播的多个数据,每个数据均可以采用数据标识来表示。为了方便终端管控各个数据,终端上存储有与各个数据标识对应的历史终端丢失数据片标识。其中,历史终端丢失数据片标识的含义为在传输目标数据过程中,针对目标数据而言终端所有已丢失数据片的标识。终端可以在存储空间中查找与目标数据标识对应的历史终端丢失数据片标识。
为了更加方便本领域技术人员更加清楚了解与目标数据标识对应的历史终端丢失数据片标识,下面以一个具体实例来详细说明。例如,以目标数据分为6个数据片为例,各个数据片的标识为1、2、3、4、5和6。在当前数据片的当前标识为6的情况下,假设终端在此之前已经丢失标识2和标识4对应的数据片,则历史终端丢失数据片标识为标识2和标识4的。
由于终端在接收数据片对象的过程中,丢失数据片会持续变化,所以,在终端接收当前数据片对象之后,首先会更新历史终端丢失数据片标识, 以便终端及时得知自身已丢失数据片的最新情况。
下面详细介绍终端更新历史终端丢失数据片标识的具体过程,如图4所示,包括以下步骤:
步骤S401:判断当前数据片是否准确接收。若是,则进入步骤S402,否则进入步骤S406。
在接收当前数据片对象之后从中提取当前数据片,并判断当前数据片是否完整。由于服务器在发送当前数据片时,可以计算当前数据片的MD5码,并伴随着当前数据片发送至终端。终端在接收当前数据片之后,仍然利用同样方式计算已接收的当前数据片的MD5码。
可以理解的是,若终端接收到的当前数据片与服务器发送的当前数据片一致的话,终端计算的MD5码与服务器计算的MD5码应该是一致的。因此,在终端确定自身计算得到的MD5码与服务器发送的MD5码一致的话,则确定当前数据片正确接收,否则确定当前数据片未正确接收。
步骤S402:判断当前标识与历史标识是否连续。即,将所述当前数据片的当前标识与上一次正确接收数据片的历史标识进行对比;其中,所述服务器上所述目标数据的N个数据片的标识连续,并且所述服务器依照连续的数据片标识逐个向所述终端组广播各个数据片。
服务器上目标数据的N个数据片标识是连续的,服务器向终端广播数据片时,也是按照连续的数据片标识逐个广播的。例如,假设N个数据片标识为1、2、……N。那么,服务器会依次发送标识1对应的数据片对象、标识2对应的数据片对象……标识N对应的数据片对象。
在一些情况下,由于传输过程出现问题,数据片对象可能未到达终端 便已丢失。为了统计这些由于未能够到达终端而丢失的数据片,本步骤在存储空间中确定上次正确接收的数据片的历史标识。然后,将当前数据片的当前标识与上次正确接收的数据片的历史标识进行对比,对比的目的为判断当前标识与历史标识是否连续,进而确定是否有丢失数据片。
例如,延续上述举例,在当前数据片的当前标识为6的情况下,假设终端在此之前已经丢失标识为2和4的数据片,而与标识X对应的数据片正确接收。那么本步骤将标识6与标识X进行对比,判断标识X和标识6是否连续。
步骤S403:若所述当前标识与所述历史标识连续,则确定未丢失数据片。
由于服务器在广播数据片对象时,为按照连续的数据片标识广播的,因此,若当前标识与历史标识连续时,则确定当前标识与历史标识之间未丢失中间数据片。由于当前数据片也正确接收,所以可以确定在传输当前数据片的本次传输过程中未丢失数据片。在此情况下,无需更新历史终端丢失数据片标识。
例如,延续上述举例,假设终端上次正确接收的数据片为标识5对应的数据片,即历史标识为标识5,则将标识5与当前数据片的标识6进行对比,进而发现标识5和标识6是连续的,所以,可以确定在标识5和标识6之间未丢失中间数据片。
步骤S404:若所述当前标识与所述历史标识不连续,则将所述当前标识与所述历史标识之间的中间标识,确定为中间丢失数据片标识。
若当前标识与历史标识不连续,则确定在当前标识与历史标识之间丢 失了中间数据片。然后根据当前标识与历史标识,确定两者之间的一个或多个中间标识,然后将一个或多个中间标识的确定为中间丢失数据片标识。
例如,延续上述举例,假设终端上次准确接收的数据片为标识3对应的数据片,即历史标识为标识3,则将标识3与当前数据片的标识6进行对比,进而发现标识3和标识6是不连续的。所以,确定标识3和标识6之间的中间标识:标识4和标识5,从而将标识4和标识5确定中间丢失数据片标识。
步骤S405:将所述中间丢失数据片标识更新至与所述目标数据标识对应的历史终端丢失数据片标识中,并确定与所述目标数据标识对应的当前终端丢失数据片标识。
在步骤S404中确定中间丢失数据片标识之后,由于当前数据片正确接收,所以仅利用中间丢失数据片标识更新历史终端丢失数据片标识即可,将更新后的历史终端丢失数据片标识确定为当前终端丢失数据片标识。
在更新历史终端丢失数据片标识的过程中,若中间丢失数据片标识中一个数据片标识在历史终端丢失数据片标识中已有,则无需重复添加至历史终端丢失数据片标识中。若中间丢失数据片标识中一个数据片标识在历史终端丢失数据片标识中没有,则向历史终端丢失数据片标识中添加该数据表标识。
例如,延续上述举例,中间丢失数据片标识为标识4和标识5,历史终端丢失数据片标识为表示2和标识4,则针对中间丢失数据片标识中的标识4,由于在历史终端丢失数据片标识中已经具有,因此,无需将标识4添加至历史终端丢失数据片标识中;则针对中间丢失数据片标识中的标识 5,由于在历史终端丢失数据片标识中已经不具有,因此,需将标识5添加至历史终端丢失数据片标识中。更新历史终端丢失数据片标识之后得到的当前终端丢失数据片标识为标识2、标识4和标识5。
步骤S406:在判定所述当前数据片未正确接收的情况下,将所述当前数据片确定为已丢失数据片。
在终端确定当前数据片未正确接收的情况下,则将当前数据片的当前标识也确定已丢失数据片,然后执行步骤S407。
步骤S407:判断当前标识与历史标识是否连续。即,将所述当前数据片的当前标识与上一次正确接收数据片的历史标识进行对比;其中,所述服务器上所述目标数据的N个数据片的标识连续,并且所述服务器依照连续的数据片标识逐个向所述终端组广播各个数据片。若是,则进入步骤S408,否则进入步骤S409。
本步骤的执行过程与步骤S402一致,参考上述内容即可,在此不再赘述。
步骤S408:若所述当前标识与所述历史标识连续,则将所述当前数据片的当前标识更新至与所述目标数据标识对应的历史终端丢失数据片标识中,并确定与所述目标数据标识对应的当前终端丢失数据片标识。
若当前标识与历史标识连续,则确定在当前标识与历史标识之间不具有丢失的数据片。在此情况下,直接将当前数据片的当前标识更新至历史终端丢失数据片标识中即可。
步骤S409:若所述当前标识与所述历史标识不连续,则将所述当前标识与所述历史标识之间的中间标识,确定为中间丢失数据片标识。
若当前标识与历史标识不连续,则确定中间丢失数据片标识,具体执行过程参考步骤S404即可,在此不再赘述。
步骤S410:将所述当前数据片和所述中间丢失数据片标识更新至与所述目标数据标识对应的历史终端丢失数据片标识中,并确定与所述目标数据标识对应的当前终端丢失数据片标识。
由于当前数据片和中间丢失数据片标识对应的数据片均为已丢失数据片,所以将当前数据片的当前标识和中间丢失数据片标识中的一个或多个中间标识,更新至历史终端丢失数据片标识中即可。
上述过程详细介绍了更新历史终端丢失数据片标识并得到当前终端丢失数据片标识的详细过程,已在步骤S405中进行详细描述,在此不再赘述。
接着返回图3,进入步骤S304:确定与目标数据标识对应的历史服务器丢失数据片标识。
历史服务器丢失数据片标识为所述服务器上次向所述终端组的各个终端广播的、服务器已知所述目标数据目前已丢失数据片的标识。
服务器可以统计各个终端目前已丢失的数据片标识,然后将各个终端目前已丢失的数据片标识进行汇总,从而用于表示服务器已知所述目标数据目前已丢失的数据片标识的历史服务器丢失数据片标识。
终端可以在存储空间中查找与目标数据标识对应的历史服务器丢失数据片标识。为了方便本领域技术人员更加清楚了解历史服务器丢失数据片标识,下面以一个具体实例来详细说明。
例如,以目标数据分为6个数据片为例,各个数据片的标识为1、2、3、4、5和6。在当前数据片的当前标识为6的情况下,假设服务器已知的各个终端已丢失标识1、标识2和标识3的数据片,则历史服务器丢失数据片标识为标识1、标识2和标识3的。
伴随着数据传输过程,终端上已丢失的数据片在发生变化。为了保证服务器可以准确知晓各个终端的已丢失数据片的变化,终端可以将当前终端丢失数据片标识与终端已存储的历史服务器丢失数据片标识进行对比。终端已存储的历史服务器丢失数据片标识为服务器上次广播至终端的,因此,终端上存储的历史服务器丢失数据片标识,即为服务器上存储的历史服务器丢失数据片标识。
步骤S305:在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识。
将当前终端丢失数据片标识与历史服务器丢失数据片标识进行对比,如果历史服务器丢失数据片标识包含当前终端丢失数据片标识,则说明服务器未遗漏已丢失的数据片标识;如果历史服务器丢失数据片标识未全部包含当前终端丢失数据片标识,则说明服务器遗漏已丢失的数据片标识。
然后,在当前终端丢失数据片标识中确定出历史服务器丢失数据片标识不具有的数据片,这些数据片即为服务器上遗漏的已丢失数据片,因此将这些数据片的称为遗漏数据片标识。
例如,延续上述举例,历史服务器丢失数据片标识为标识1、标识2和标识3的,当前终端丢失数据片标识为标识2、标识4和标识5。通过比对,可以发现标识4和标识5在当前终端丢失数据片标识中具有,而在历 史服务器丢失数据片标识中不具有。因此,将标识4和标识5确定为遗漏数据片标识。
步骤S306:在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识,其中,所述反馈门限值至少为1且小于N。
可以理解的是,如果历史服务器丢失数据片标识包含当前终端丢失数据片标识,即遗漏数据片标识为空集,则说明该终端上当前已丢失的所有数据片标识,服务器已经全部知晓。此情况下,说明服务器上的历史服务器丢失数据片标识应该是比较准确的,所以,该终端无需向服务器发送遗漏数据片标识。
若遗漏数据片标识非空集,则说明该终端上当前已丢失的所有数据片中有一部分数据片(遗漏数据片标识中的数据片)是遗漏的,理论上,终端可以向服务器发送遗漏数据片标识,以便更新服务器上已有的历史服务器丢失数据片标识。
本步骤通过判定遗漏数据片标识是否为空集,可以过滤一部分遗漏数据片标识为空集的终端,从而可以减少一部分向服务器发送丢失数据片的终端数量。
但是,发明人研究发现通过判定遗漏数据片标识是否为空集的方式,仍然无法解决服务器不可用的问题,因为仍然有很多终端的遗漏数据片标识非空集,因此本实施例为每个终端设定一个反馈门限值。反馈门限值至少为1且小于N,具体数值可以根据具体情况而定,在此不做限定。
只有在遗漏数据片标识中标识数量大于反馈门限值的情况下,终端才 向服务器发送遗漏数据片标识。由于遗漏数据片标识非空集的数量可能较多,但是遗漏数据片标识的标识数量大于反馈门限值的终端数量不会很多。因此,通过设定反馈门限值可以过滤掉遗漏数据片标识的标识数量不大于反馈门限的大部分终端,因此,向服务器发送遗漏数据片标识的终端数量大大减少。
细心的本领域技术人员会发现,按照此方式可能会遗漏掉一些已丢失的数据片标识。确实是这样的,按照此方式可能会遗漏掉数据片标识,但是遗漏的数据片标识的数量相比现有技术而言大大减少。因为,一些终端丢失的数据片可能是相同的,假设终端1丢失标识1的数据片,终端2可能也丢失标识1的数据片。终端1可能因为标识数量不大于反馈门限,而无法将标识1发送至服务器;但是,终端2可能因为标识数量大于反馈门限,将标识1发送至服务器,所以,服务器仍然可以得知标识1的数据片已丢失。
通过以上内容可以看出本实施例具有以下有益效果:
本申请提供的数据组呼方法,将当前终端丢失数据片标识与历史服务器丢失数据片标识进行对比,并确定终端上已有的而服务器上不具有的数据片标识,该数据片标识即服务器上遗漏的所有已丢失数据片的数据片标识,简称遗漏数据片标识。
为了防止服务器因无资源来处理过多的遗漏数据片标识而不可用,可以为终端设定一个反馈门限值,在终端的遗漏数据片标识中的标识数量大于反馈门限值时,向服务器发送遗漏数据片标识,在终端的遗漏数据片标识中的标识数量不大于反馈门限值时,不向服务器发送遗漏数据片标识。
这样,降低多个终端同时向服务器反馈遗漏数据片标识的概率,从而保证服务器不会接收过多反馈信息而不可用。这样,便可以在服务器上采用数据重传思想来保证数据准确性。
在终端组中的终端执行图3所示的实施例,并向服务器发送遗漏数据片标识之后,服务器可以根据终端组中的终端发送的遗漏数据片标识更新已有的历史服务器丢失数据片标识,并得到当前服务器丢失数据片标识。由于服务器上的服务器数据片标识已由历史服务器丢失数据片标识改变为当前服务器丢失数据片标识,因此,服务器可以重新向终端组的各个终端广播当前服务器丢失数据片标识。
下面介绍终端在接收服务器发送的当前服务器丢失数据片标识的处理过程。如图5所示,具体包括以下步骤:
步骤S501:接收所述服务器广播的当前服务器丢失数据片标识;其中,所述当前服务器丢失数据片标识为所述服务器利用所述终端组中的终端发送的遗漏数据片标识更新服务器上已有的所述历史服务器丢失数据片标识后得到的。
服务器在更新历史服务器丢失数据片标识得到当前服务器丢失数据片标识之后,可以向图3所示的实施例中终端广播当前服务器丢失数据片标识,终端则可以接收当前服务器丢失数据片标识。
步骤S502:将所述当前终端丢失数据片标识与所述当前服务器丢失数据片标识进行对比,并再次在所述当前终端丢失数据片标识中确定所述当前服务器丢失数据片标识所不具有的遗漏数据片标识。
由于图3所示的实施例中当前终端丢失数据片标识与历史服务器丢失数据片标识进行对比,由于历史服务器丢失数据片标识改变为当前服务器丢失数据片标识。可以理解的是,终端上的遗漏数据片标识也会随之发生变化。因此,将当前终端丢失数据片标识与当前服务器丢失数据片标识进行对比,从而重新确定终端的遗漏数据片标识。具体过程可以参看步骤S303的详细描述,在此不再赘述。
步骤S503:判断所述遗漏数据片标识中标识数量是否大于反馈门限值,若是,则进入步骤S504;否则进入步骤S505。
由于遗漏数据片标识可能也发生变化,其中标识数量也会随时发生变化。因此,重新判断遗漏数据片标识中的标识数量是否大于反馈门限值。
步骤S504:在所述遗漏数据片标识中的标识数量大于所述反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识,进入步骤S501。
若遗漏数据片的标识数量大于反馈门限值,则向服务器发送所述遗漏数据片标识。
服务器可以重新接收终端组中的终端发送的遗漏数据片标识,并依据终端组中的终端重新确定当前服务器丢失数据片标识,然后进入步骤S501,重复执行上述过程,直到终端组中没有终端向服务器发送遗漏数据片标识。
步骤S505:利用所述当前服务器丢失数据片标识,更新终端存储的所述历史服务器丢失数据片标识。
在终端组中没有终端向服务器发送遗漏数据片标识之后,则说明终端对当前服务器丢失数据片标识的处理过程已经完毕,此时可以利用当前服 务器丢失数据片标识更新终端已存储的历史服务器丢失数据片标识,以便下一个循环过程的执行。
图3-图5所示的实施例为服务器向终端发送当前数据片对象的相关处理过程。可以理解的是,服务器向终端发送每个数据片对象,终端均按图3-图5所示的过程进行处理,直到服务器发送目标数据的所有数据片对象发送完毕。
在上述图3-图5的处理过程中,伴随着服务器不断发送数据片对象,终端上的当前终端丢失数据片标识在不断变化,与此同时,服务器上的当前服务器数据片对象也在不断变化。在所有数据片对象发送完毕之后,当前终端丢失数据片标识则为自身已经具有的所有已丢失的数据片标识的,因此,将此时的当前终端丢失数据片标识称为已有终端丢失数据片标识。在所有数据片对象发送完毕之后,当前服务器丢失数据片标识则为各个终端所有已丢失的数据片标识的汇总,因此,将服务器此时的当前服务器丢失数据片标识称为已有服务器丢失数据片标识。
为了再次确定是否还有遗漏的数据片标识,在所有数据片均发送完毕之后,服务器可以再次向终端组广播已有服务器丢失数据片标识。下面介绍终端在接收已有服务器丢失数据片标识的处理过程。
步骤S601:接收服务器在所述目标数据的所有数据片对象均广播完毕之后,向所述终端组的各个终端广播的已有服务器丢失数据片标识;其中,所述已有服务器丢失数据片标识为服务器在广播所有数据片对象之后,服 务器已知所述目标数据所有已丢失数据片的数据片标识。
详细执行过程与步骤S301类似,可以参见步骤S301,在此不再赘述。
步骤S602:将已有终端丢失数据片标识与所述已有服务器丢失数据片标识进行对比,并在所述已有终端丢失数据片标识中确定所述已有服务器丢失数据片标识所不具有的遗漏数据片标识;其中,所述已有终端丢失数据片标识为终端在接收所有数据片对象之后,所确定所有已丢失数据片的数据片标识。
详细执行过程与步骤S303类似,可以参见步骤S303,在此不再赘述。
步骤S603:若所述遗漏数据片标识非空集,则将所述遗漏数据片标识发送至所述服务器,由所述服务器确定最终服务器数据片标识。
本步骤与图3所示的实施例不同的是,本步骤判断遗漏数据片标识是否为空集,而不是判断遗漏数据片标识的标识数量是否大于反馈门限值。这样做的目的为,使得终端上的所有遗漏数据片均发送至服务器,以便服务器最终准确将各个终端已丢失的数据片进行汇总,而不会因为反馈门限值的限制而遗漏部分数据片标识。
由于经过图3-图5所示的实施例,服务器仍然遗漏数据片标识的概率是较低的,所以此时不会具有大量的终端的遗漏数据片标识仍然为非空集,即,不会出现较多的终端再次向服务器发送遗漏数据片标识,因此,该过程不会引起服务器不可用。
服务器可以再次接收终端发送再次发送的遗漏数据片标识,利用遗漏数据片标识更新已有服务器丢失数据片标识,并得到最终服务器数据片标识。最终服务器数据片标识的含义为在第一次目标数据传输过程中,各个 终端所有已丢失数据片的数据片标识的汇总。
在服务器在确定最终服务器数据片标识之后,可以依据最终数据片标识中包含的数据片标识,重传与之对应的数据片对象,从而使得各个终端可以重新接收数据片对象,以便完成接收目标数据的目的。
如图7所示,终端重新接收数据片对象的过程包括以下步骤:
步骤S701:接收所述服务器依据所述最终服务器数据片标识逐个广播的遗漏数据片对象;其中,所述遗漏数据片对象包括遗漏数据片、遗漏数据片标识、所述终端组的组标识、目标数据标识和数据传输次数。
终端接收一个遗漏数据片对象,具体过程可以参考步骤S301,在此不再赘述。与步骤S301不同的是,遗漏数据片标识中数据传输次数非第一次。因此不再执行步骤S302,而是执行步骤S702。
步骤S702:在所述数据传输次数表示所述服务器非第一次广播所述当前数据片对象的情况下,判断所述已有终端丢失数据片标识是否包含所述遗漏数据片标识。
由于最终服务器数据片标识中包含各个终端已丢失数据片的标识(即遗漏数据片标识),并且各个终端已丢失的数据片可能不相同的,因此,服务器下发一个与遗漏数据片标识对应的遗漏数据片对象,可能是本终端已丢失数据片,可能不是本终端已丢失的数据片。
所以,终端在接收遗漏数据片对象之后,首先判断遗漏数据片的遗漏标识是否在终端自身的已有终端丢失数据片标识中;若在,则表示遗漏数据片对象确实是自身已丢失的,进入步骤S703;否则,表示自身已经在第 一次传输目标数据的过程正确接收遗漏数据片对象,因此,不必重复接收遗漏数据片对象。
步骤S703:若所述已有终端丢失数据片标识包含所述遗漏数据片标识,则接收所述遗漏数据片对象。
若遗漏数据片对象确实是自身已丢失的,则接收遗漏数据片对象。然后验证遗漏数据片是否正确接收。
步骤S704:若所述遗漏数据片对象正确接收的情况下,则在所述已有终端丢失数据片标识中删除所述遗漏数据片标识。
若经过验证之后,发现遗漏数据片已经正确接收,则可以在已有终端丢失数据片标识中删除遗漏数据片标识,以便已有终端丢失数据片标识中始终由终端已丢失的数据片标识组成。
步骤S705:判断所述已有终端丢失数据片标识是否为空集。若是,则进入步骤S706,否则进入步骤S707。
若已有终端丢失数据片标识不为空集,则进入步骤S701继续接收服务器下发的遗漏数据片标识。重复执行上述过程直到服务器将遗漏数据片对象发送完毕。
步骤S706:若所述已有终端丢失数据片标识为空集,则释放与所述服务器的会话连接。
在正确接收遗漏数据片对象并删除遗漏数据片标识之后,会判断已有终端丢失数据片标识是否为空集,若已经为空集,则说明该终端已经全部接收目标数据,此时可以释放与服务器的连接,不必继续接收后续的遗漏数据片对象,可以去执行其它处理过程。
可以理解的是,在图7所示的过程执行完毕之后,服务器可以将已有服务器丢失数据片标识清空。如果在图7所述的过程执行完毕之后,仍然有一部分终端的已有终端丢失数据片标识为非空集,则各个终端可以向服务器再次发送已有终端丢失数据片标识。
服务器根据仅根据各个终端已发送的已有终端丢失数据片标识的并集,再次作为已有服务器丢失数据片标识。然后,重新执行图7所示的实施例,以便各个终端再次接收遗漏数据片。
可以理解的是,为了防止终端恶意攻击服务器,即恶意向服务器持续发送遗漏数据片,进而导致服务器会持续执行图7所示的执行过程,从而占用服务器很多资源。为此,服务器可以设置重传次数,用于表示图7所示的执行过程的上限次数。重传次数可以依据具体情况而定,在此不做限定。
假设重传次数为3,则服务器最多执行三次图7所示的执行过程。在此之后,即便已有服务器丢失数据片标识仍然不为空集,服务器也不会在重传数据片对象,以防止终端的恶意攻击。
图3-图7为终端侧的执行过程,下面介绍服务器则的执行过程。
服务器首先获取待广播目标数据,然后将目标数据分为N个数据片,并为每个数据片分配连续数据片标识。这些执行过程已经在图1所示的数据组呼系统的实施例中进行详细描述,在此不再赘述。
下面介绍服务器向终端发送当前数据片的当前数据片对象的具体过程。如图8所示,具体包括以下步骤:
步骤S801:广播与目标数据中当前数据片对应的当前数据片对象,其中,所述当前数据片对象包括当前数据片、所述当前数据片的当前标识、所述终端组的组标识、目标数据标识和数据传输次数;所述目标数据被所述服务器切分为N个数据片,所述当前数据片为其中一个数据片,N为非零自然数;。
步骤S802:接收所述终端组中多个终端发送的遗漏数据片标识,所述遗漏数据片标识由终端在确定所述遗漏数据片标识中的标识数量大于反馈门限值的情况下向所述服务器发送;所述反馈门限值至少为1且小于N。
其中,所述遗漏数据片标识为在所述当前终端丢失数据片标识中确定的所述历史服务器丢失数据片标识所不具有的遗漏数据片的;所述当前终端丢失数据片标识为利用所述当前数据片对象更新与所述目标数据标识对应的历史终端丢失数据片标识得到的;所述历史终端丢失数据片标识和所述当前终端丢失数据片标识,均由该终端已丢失数据片的标识组成;所述历史服务器丢失数据片标识为,所述服务器上次向所述终端组的各个终端广播的、服务器已知所述目标数据目前已丢失数据片的标识。
图8所示的具体过程,已在图3所示的实施例中进行详细描述,因此可以参看图3所示的实施例的详细描述,在此不再赘述。
服务器在接收所述终端组中多个终端发送的遗漏数据片标识之后,可以更新自身的历史服务器丢失数据片标识,并更新终端上已存储的历史服务器丢失数据片标识。如图9所示,具体包括以下执行步骤:
步骤S901:利用所述终端组中的终端发送的遗漏数据片标识,更新已 有的所述历史服务器丢失数据片标识并获得当前服务器丢失数据片标识。
服务器可以利用各个终端的遗漏数据片标识来更新已有的历史服务器丢失数据片标识。具体更新过程可以为:针对每个遗漏数据片标识中每个遗漏数据片标识执行下述过程,判断历史服务器丢失数据片标识是否包含遗漏数据片标识,若包含则不必添加至已有历史服务器丢失数据片标识中,若不包含则添加至已有历史服务器丢失数据片标识中。
在所有遗漏数据片标识均执行更新操作之后,将更新后的已有服务器丢失数据片标识确定为当前服务器丢失数据片标识。
步骤S902:广播所述当前服务器丢失数据片标识。
为了更新终端上的历史服务器丢失数据片标识,服务器可以向终端组广播当前服务器丢失数据片标识。各个终端可以执行图5所示的实施例,从而实现更新终端上已存储的历史服务器丢失数据片标识的目的。具体过程可以参看图5所示的实施例,在此不再赘述。
步骤S903:重复执行上述步骤直到所述目标数据的所有数据片对象均广播完毕。
服务器在步骤S901和步骤S902之后,可以再次向终端广播数据片对象,在接收终端发送的遗漏数据片标识之后,重复执行步骤S901和步骤S902,直到服务器发送完毕所有数据片对象。
步骤S904:将所述目标数据的所有数据片对象均广播完毕之后的所述当前服务器丢失数据片标识,确定为已有服务器丢失数据片标识。
在服务器广播完所有数据片对象之后,此时,服务器上当前服务器丢失数据片标识即为服务器已知的、各个终端已丢失数据片的标识的汇总。 因此,可以将这些数据片标识确定为已有服务器丢失数据片标识。
为了再次确定已有服务器丢失数据片标识是否有遗漏,在所述目标数据的所有数据片对象均广播完毕之后,可以执行查漏补缺的过程。如图10所示,具体包括以下步骤:
步骤S1001:广播所述已有服务器丢失数据片标识。
步骤S1002:在预设时间内接收所述终端组中的终端发送的遗漏数据片标识;其中,所述遗漏数据片标识为终端将已有终端丢失数据片标识与所述已有服务器丢失数据片标识进行对比,并在所述已有终端丢失数据片标识中确定所述已有服务器丢失数据片标识所不具有的遗漏数据片的;并且,所述遗漏数据片标识非空集;所述已有终端丢失数据片标识为终端在接收所有数据片对象之后,所确定已丢失数据片的;
步骤S1003:利用所述终端组的中终端发送的遗漏数据片标识更新所述已有服务器丢失数据片标识,并得到最终服务器数据片标识。
上述过程已在图6所示的实施例中进行详细说明,在此不再赘述。
在服务器在确定最终服务器数据片标识之后,可以依据最终数据片标识中包含的数据片标识,重传与之对应的数据片对象,从而使得各个终端可以重新接收数据片对象,以便完成接收目标数据的目的。
如图11所示,服务器重新广播数据片对象的过程,包括以下步骤:
步骤S1101:依据所述最终服务器数据片标识逐个广播遗漏数据片对象;其中,所述遗漏数据片对象包括遗漏数据片、遗漏数据片标识、所述 终端组的组标识、目标数据标识和数据传输次数。
步骤S1102:在所述最终服务器数据片标识的所述数据片均广播完毕之后,清空所述最终服务器数据片标识;
步骤S1103:接收所述终端组中的终端发送的已有终端丢失数据片标识;其中,终端在判定所述已有终端丢失数据片标识非空集的情况下,向所述服务器发送所述已有终端丢失数据片标识。
步骤S1104:利用所述终端组中的终端发送的已有终端丢失数据片标识,重新确定所述最终服务器数据片标识。
步骤S1105:重复执行以上步骤直到所述最终服务器数据片标识为空集,或者,所述数据传输次数到达指定重发次数。
上述过程已在图7所示的实施例中进行详细说明,在此不再赘述。
在图11所示的过程中,在服务器上添加了重传技术,从而可以提高数据传输的准确性。
如图1所示,本申请提供一种数据组呼系统,包括服务器100和与所述服务器100相连的多个终端组200。
所述终端组用于执行图3-图7任一项所述的数据组呼方法;
所述服务器用于执行图8-图11任一项所述的数据组呼方法。
如图12所示,本申请提供了一种终端,包括:
第一处理器1201,用于确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;并在 所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向通信模块发送所述遗漏数据片标识;
第一通信模块1202,用于向所述服务器发送所述遗漏数据片标识。
如图13所示,本申请还提供了一种服务器,包括:
第二通信模块1301,用于接收终端发送的与目标数据标识对应的遗漏数据片标识;
第二处理器1302,用于利用所述终端组中的终端发送的遗漏数据片标识,更新历史服务器丢失数据片标识,并获得当前服务器丢失数据片标识;并控制通信模块广播所述当前服务器丢失数据片标识;重复执行上述步骤直到包含目标数据标识的数据片对象均广播完毕。
如图14所示,本申请提供了一种数据组呼装置,其特征在于,包括:
第一确定单元121,用于确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;
第二确定单元122,用于在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;
发送单元123,用于在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识。
如图15所示,本申请提供了一种数据组呼装置,包括:
接收单元131,用于接收终端发送的与目标数据标识对应的遗漏数据片标识;利用所述终端组中的终端发送的遗漏数据片标识,更新历史服务器丢失数据片标识,并获得当前服务器丢失数据片标识;
广播单元132,用于广播所述当前服务器丢失数据片标识。
本实施例方法所述的功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算设备可读取存储介质中。基于这样的理解,本申请实施例对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该软件产品存储在一个存储介质中,包括若干指令用以使得一台计算设备(可以是个人计算机,服务器,移动计算设备或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
本说明书中各个实施例采用递进的方式描述,每个实施例重点说明的都是与其它实施例的不同之处,各个实施例之间相同或相似部分互相参见即可。
对所公开的实施例的上述说明,使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下,在其它实施例中实现。因此,本申请将不会被限制于本文所示的这些实施例,而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (16)

  1. 一种数据组呼方法,其特征在于,包括:
    确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;
    在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;
    在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识。
  2. 如权利要求1所述的方法,其特征在于,在所述目标数据标识对应的数据片被划分为N个数据片的情况下,则所述反馈门限值大于或等于1,并且小于N。
  3. 如权利要求1所述的方法,其特征在于,所述确定与目标数据标识对应的当前终端丢失数据片标识,包括:
    接收所述服务器广播的、包含目标数据标识的当前数据片对象;
    在所述服务器第一次广播所述当前数据片对象的情况下,确定与所述目标数据标识对应的历史终端丢失数据片标识;
    利用所述历史终端丢失数据片标识和所述当前数据片对象,确定所述当前终端丢失数据片标识。
  4. 如权利要求3所述的方法,其特征在于,所述利用所述历史终端丢失数据片标识和所述当前数据片对象,确定所述当前终端丢失数据片标识,包括:
    在判定所述当前数据片对象正确接收的情况下,则将所述当前数据片 对象对应的当前标识与上一次正确接收数据片对象的历史标识进行对比;
    若所述当前标识与所述历史标识连续,则将所述历史终端丢失数据片标识确定为当前终端丢失数据片标识;
    若所述当前标识与所述历史标识不连续,则将所述当前标识与所述历史标识之间的所有中间标识,确定为中间丢失数据片标识;
    将所述中间丢失数据片标识更新至所述历史终端丢失数据片标识中,并将更新后的历史终端丢失数据片标识、确定为当前终端丢失数据片标识。
  5. 如权利要求3所述的方法,其特征在于,所述利用所述历史终端丢失数据片标识和所述当前数据片对象,确定所述当前终端丢失数据片标识,包括:
    在判定所述当前数据片对象未正确接收的情况下,将所述当前数据片对象对应的当前标识确定为已丢失数据片标识;
    将所述当前数据片对象对应的当前标识与上一次正确接收数据片对象的历史标识进行对比;
    若所述当前标识与所述历史标识连续,则将已丢失数据片标识更新至述历史终端丢失数据片标识中,并将更新后的历史终端丢失数据片标识、确定为当前终端丢失数据片标识;
    若所述当前标识与所述历史标识不连续,则将所述当前标识与所述历史标识之间的所有中间标识,确定为中间丢失数据片标识;
    将所述中间丢失数据片标识和已丢失数据片标识、更新至所述历史终端丢失数据片标识中,并将更新后的历史终端丢失数据片标识、确定为当前终端丢失数据片标识。
  6. 如权利要求1所述的方法,其特征在于,在向服务器发送所述遗漏数据片标识之后,还包括:
    接收所述服务器广播的当前服务器丢失数据片标识;
    再次在所述当前终端丢失数据片标识中,确定出所述当前服务器丢失数据片标识所不具有的遗漏数据片标识;
    在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识;
    重复执行上述步骤直到所述遗漏数据片标识中的标识数量不大于所述反馈门限值。
  7. 如权利要求1所述的方法,其特征在于,还包括:
    在服务器将包含目标数据标识的数据片对象发送完毕后,在已有终端丢失数据片标识中、确定所述已有服务器丢失数据片标识所不具有的遗漏数据片标识;若所述遗漏数据片标识非空集,则将所述遗漏数据片标识发送至所述服务器,由所述服务器确定最终服务器数据片标识。
  8. 如权利要求7所述的方法,其特征在于,还包括:
    接收所述服务器依据所述最终服务器数据片标识逐个广播的遗漏数据片对象;
    在所述服务器非第一次广播所述当前数据片对象的情况下,判断所述已有终端丢失数据片标识是否包含所述遗漏数据片标识;
    若所述已有终端丢失数据片标识包含所述遗漏数据片标识,则接收所述遗漏数据片对象;
    若所述遗漏数据片对象正确接收的情况下,则在所述已有终端丢失数 据片标识中删除所述遗漏数据片标识;
    在所述最终服务器数据片标识的所述数据片均广播完毕之后,判断所述已有终端丢失数据片标识是否为空集;
    若所述已有终端丢失数据片标识为空集,则释放与所述服务器的会话连接;
    若所述已有终端丢失数据片标识不为空集,则进入接收所述服务器依据所述最终服务器数据片标识逐个广播的遗漏数据片对象的步骤,直到服务器将遗漏数据片对象发送完毕。
  9. 一种数据组呼方法,其特征在于,应用于数据组呼系统的服务器所述方法包括:
    接收终端发送的与目标数据标识对应的遗漏数据片标识;
    利用所述终端组中的终端发送的遗漏数据片标识,更新历史服务器丢失数据片标识,并获得当前服务器丢失数据片标识;
    广播所述当前服务器丢失数据片标识;
    重复执行上述步骤直到包含目标数据标识的数据片对象均广播完毕。
  10. 如权利要求9所述的方法,其特征在于,在所述目标数据的所有数据片对象均广播完毕之后,还包括:
    广播已有服务器丢失数据片标识;
    在预设时间内接收终端发送的遗漏数据片标识;
    利用所述遗漏数据片标识更新所述已有服务器丢失数据片标识,并获得最终服务器数据片标识。
  11. 如权利要求10所述的方法,其特征在于,还包括:
    依据所述最终服务器数据片标识逐个广播遗漏数据片对象;在所述最终服务器数据片标识的所述数据片均广播完毕之后,清空所述最终服务器数据片标识;
    接收终端发送的已有终端丢失数据片标识;
    利用所述终端组中的终端发送的已有终端丢失数据片标识,重新确定所述最终服务器数据片标识;
    重复执行以上步骤直到所述最终服务器数据片标识为空集,或者,所述数据传输次数到达指定重发次数。
  12. 一种终端,其特征在于,包括:处理器;
    所述处理器,用于执行如权利要求1-8任一项所述的数据组呼方法。
  13. 一种服务器,其特征在于,包括:处理器;
    所述处理器,用于执行如权利要求9-11任一项所述的数据组呼方法。
  14. 一种数据处理系统,其特征在于,包括:
    服务器和与所述服务器相连的多个终端组;
    所述服务器,用于执行如权利要求9-11任一项所述的数据组呼方法;
    每个终端组中的终端,用于执行如权利要求1-8任一项所述的数据组呼方法。
  15. 一种数据组呼装置,其特征在于,包括:
    第一确定单元,用于确定与目标数据标识对应的当前终端丢失数据片标识和历史服务器丢失数据片标识;
    第二确定单元,用于在所述当前终端丢失数据片标识中,确定出所述历史服务器丢失数据片标识所不具有的遗漏数据片标识;
    发送单元,用于在所述遗漏数据片标识中的标识数量大于反馈门限值的情况下,向所述服务器发送所述遗漏数据片标识。
  16. 一种数据组呼装置,其特征在于,包括:
    接收单元,用于接收终端发送的与目标数据标识对应的遗漏数据片标识;利用所述终端组中的终端发送的遗漏数据片标识,更新历史服务器丢失数据片标识,并获得当前服务器丢失数据片标识;
    广播单元,用于广播所述当前服务器丢失数据片标识。
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CN105391518A (zh) * 2015-10-16 2016-03-09 中国人民解放军国防科学技术大学 一种面向深空网络的文件传输方法
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