CN101651517A - Method and device for detecting loss of burst sequences - Google Patents
Method and device for detecting loss of burst sequences Download PDFInfo
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- CN101651517A CN101651517A CN200810135161A CN200810135161A CN101651517A CN 101651517 A CN101651517 A CN 101651517A CN 200810135161 A CN200810135161 A CN 200810135161A CN 200810135161 A CN200810135161 A CN 200810135161A CN 101651517 A CN101651517 A CN 101651517A
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Abstract
The invention discloses a method and a device for detecting the loss of burst sequences. The method comprises the following steps that a first network element assigns a data burst sequence number to each data burst, and identifies the data burst sequence number on each data packet in the data bursts; and for each data packet, the first network element sends the data packet to at least one lower-layer network element, wherein the data packet carries the data burst sequence number corresponding to the data packet. The method and the device can detect the lost data burst by setting the data burstsequence number for each data burst and identifying the set data burst sequence number on each data packet in the data bursts.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of detection method and device of loss of burst sequences.
Background technology
Along with the Internet rapid network development, a large amount of multimedia services emerge, people no longer are satisfied with phone and messaging service to the demand of mobile communication, at present, introduced applied business in the multimedia service, the characteristics of applied business are that a plurality of users can receive identical data, for example video request program, television broadcasting, video conference, online education, interactive game etc. simultaneously.
In order to effectively utilize mobile network resource, multimedia broadcast-multicast service (Multimedia Broadcast Multicast Service has been proposed, abbreviate MBMS as) technology, MBMS is a data source sends a point-to-multipoint service from data to a plurality of users, by this business, can realize that Internet resources are shared, comprise that mobile core network and access network resources are shared, especially interface-free resources shares, and the MBMS among the 3GPP not only can realize the classes of messages multicast and the broadcasting of plain text low rate, and can realize the multimedia service multicast and the broadcasting of two-forty.
MBMS single frequency network transmission means (MBMS Single Frequency Network abbreviates MBSFN as) is a kind of technology that can improve the professional availability of frequency spectrum of MBMS.Among the MBSFN, the wireless signal that the neighbor cell synchronized transmission is identical, subscriber equipment (UE) can be considered as multipath signal with the signal that comes from different base station.The MBSFN retaining zone is formed in a plurality of sub-districts of the professional wireless signal of synchronized transmission MBMS, the sub-district in the MBSFN retaining zone, and the MBMS service signal that synchronized transmission is identical, these sub-districts are called the MBSFN sub-district.
Because the MBMS business is the service towards the whole network, same MBMS business may be based upon on the different lower network element nodes, particularly, upper strata network element layer network element downwards sends data flow, wherein, comprise a plurality of data bursts in this data flow, comprise a plurality of packets in each data burst, at present, adopt following method to realize that a plurality of network elements are in the MBMS of minizone service synchronization, Fig. 1 shows the logical construction frame diagram of upper strata network element and lower network element, and as can be seen, a upper strata network element is connected with a plurality of lower network element, carry out Signalling exchange, Fig. 2 is the flow chart according to the synchronous implementation method of MBMS of prior art, as shown in Figure 2, comprises following processing:
Step S202, the upper strata network element sends the MBMS business data packet to each lower network element, wherein, carries timestamp information, sequence of data packet information, cumulative data packet length information etc. in this packet.For one or more continuously and need carry out Radio Link control (Radio Link Control, abbreviating RLC as) protocol layer is connected in series the packet of processing, the timestamp information that the upper strata network element is identical to these one or more package identifications, these one or more packets that identified identical time stamp are formed data bursts (data burst), a data burst can be one group of continuous packet, also can be an independent packet;
Step S204, for each lower network element, it receives above-mentioned MBMS business data packet, wherein, the packet in the same data burst is carried out rlc protocol layer serial connection handle, and the packet in the different pieces of information burst does not carry out the RLC serial connection;
Step S206, lower network element began to handle according to its sequence number to the moment of the packet in the same data burst in the timestamp indication of its sign;
Step S208, lower network element detects whether there be losing of packet according to the sequence of data packet information in each packet, and the number of the packet of losing;
Step S210, the cumulative data packet length information that lower network element is carried according to each packet, the cumulative length of the packet that detection is lost, constructing virtual packet.
The MBMS business data packet of each lower network element is identical because the upper strata network element sends to, and each lower network element can be carried out on all four processing like this, to realize the synchronized transmission of MBMS business in the minizone of each lower network element.
Pass through said method, lower network element is when detecting data-bag lost, can be according to the number and the total length of the packet of losing, the constructing virtual packet, wherein, the number of these virtual data bags is consistent with the number and the total length of lost data packets with total length, after the constructing virtual packet, lower network element joins the virtual data bag of structure in the user plane protocol processing, just as the packet of losing is not lost, but lower network element does not send the user face data piece (RLC PDU or MAC PDU) that comprises the virtual data bag, guarantee the follow-up data bag is handled consistent with other lower network element, and avoid causing because of the inconsistent of virtual data bag and True Data bag and neighbor cell between air interference.
Need to prove, an above-mentioned upper strata network element can be identical network element on physical function with one or more lower network element, it also can be different network elements, it is divided into upper strata network element and the just division from carrying out in logic of lower network element, the service synchronization function is finished in cooperation, be that a plurality of identical or different physical NEs are divided into a upper strata network element and one or more lower network element according to logic function, these network element cooperative cooperatings are implemented in the lower network element sub-district and send the MBMS business in many sub-districts merging mode.
There is following problem in method for synchronous at the MBMS business of the minizone of a plurality of network elements of above-mentioned realization:
One, since the upper strata network element to the different timestamp of packet marking in the different pieces of information burst, can distinguish different data bursts by different timestamps thus, but the packet number that comprises in each data burst is all different with length, the timestamp that can cause former and later two data bursts like this is not a predictable numerical value, and the difference of the timestamp of promptly per two adjacent data bursts is to determine.
Two, when loss of data takes place, lower network element can only detect the number of the packet of losing and the total length of these packets of losing according to sequence of data packet number and cumulative length information, whether belong to same data burst but can not judge these packets of losing, or belong to a plurality of data bursts.
When three, lower network element is handled the MBMS business datum, the packets need that belongs to same data burst is carried out the processing of RLC serial connection, but not carrying out the RLC serial connection, do not handle the packet that belongs to same data burst, if lower network element can not be judged the packet of losing and whether belong to still a plurality of data bursts, then can not carry out correct processing to lost data packets.
Summary of the invention
Consider the problem that can not detect the data burst of losing that exists in the correlation technique and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of detection method and device of loss of burst sequences, to address the above problem.
A kind of detection method of loss of burst sequences is provided according to an aspect of the present invention.
Detection method according to loss of burst sequences of the present invention comprises: first network element is each data burst distribute data burst sequences number, and is data burst sequence number on each package identification in the data burst; For each packet, first network element sends packet to its at least one lower network element, carries the data burst sequence number of packet correspondence in the packet.
Wherein, first network element comprises for each data burst is provided with the data burst sequence number: Sn+1=(Sn+1) MOD M, wherein, Sn+1 is the data burst sequence number of (n+1) individual data burst, Sn is the data burst sequence number of n data burst, and n is a natural number, and Sn is the integer more than or equal to 0, M is the maximum of data burst sequence number, and MOD is for carrying out modulo operation.
Preferably, the processing of carrying the data burst sequence number of packet correspondence in the packet comprises: carry the data burst sequence number in the GTP-U of packet protocol header; Perhaps, in the SYNC of packet protocol header, carry the data burst sequence number.
Preferably, packet further comprise following one of at least: timestamp, sequence number, cumulative data packet length.
Wherein, data burst is the packet of a group id identical time stamp information, and perhaps data burst is one group of packet that carries out the processing of RLC serial connection.
In addition, it is one of following that first network element comprises: the host node of the master control radio network controller of the multimedia gateway of long evolving system, universal land radio access web, the high-speed packet access system of enhancing adds, and it is one of following that lower network element comprises: the slave node of the subordinate radio network controller of the enode b of long evolving system, line access, the high-speed packet access system of enhancing adds
Further, this method also comprises: for each lower network element, under the discontinuous situation of data burst sequence number of the packet correspondence of its reception, determine that the pairing data burst of data burst sequence number of disappearance is the data burst of losing.
A kind of checkout gear of loss of burst sequences is provided according to an aspect of the present invention.
Checkout gear according to loss of burst sequences of the present invention comprises: module is set, is positioned at the first network element side, be used to each data burst distribute data burst sequences number, and be data burst sequence number on each package identification in the data burst; Sending module is positioned at the first network element side, is used for sending packet to its at least one lower network element, carries the data burst sequence number of packet correspondence in the packet.
Wherein, module is set utilizes formula S n+1=(Sn+1) MOD M that the data burst sequence number of data burst is set, wherein, Sn+1 is the data burst sequence number of (n+1) individual data burst, Sn is the data burst sequence number of n data burst, and n is a natural number, and Sn is the integer more than or equal to 0, M is the maximum of data burst sequence number, and MOD is for carrying out modulo operation.
Preferably, this device also comprises processing module, is positioned at the lower network element side, is used under the discontinuous situation of data burst sequence number of the packet correspondence that receives, and determines that the pairing data burst of data burst sequence number of disappearance is the data burst of losing.
By above-mentioned at least one technical scheme of the present invention, by each data burst is provided with the data burst sequence number, and the data burst sequence number for being provided with on each package identification in this data burst, detect the data burst of losing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 be according to the upper strata network element of correlation technique and lower network element logical architecture figure;
Fig. 2 is the synchronous method flow diagram of MBMS realization according to correlation technique;
Fig. 3 is the flow chart according to the detection method of the loss of burst sequences of the inventive method embodiment;
Fig. 4 is the schematic diagram according to the data burst of the inventive method embodiment and data burst sequence number;
Fig. 5 is the example schematic according to the detection method of the loss of burst sequences of the inventive method embodiment;
Fig. 6 is the structural framing figure according to the checkout gear of the loss of burst sequences of apparatus of the present invention embodiment.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing.
Method embodiment
According to the embodiment of the invention, provide a kind of detection method of loss of burst sequences.
Fig. 3 is the flow chart according to the detection method of the loss of burst sequences of the embodiment of the invention, and as shown in Figure 3, this method may further comprise the steps:
Step S302, first network element is provided with the data burst sequence number for each data burst, and be data burst sequence number on each package identification in the data burst, wherein, the definition of data burst can be for one of following: data burst is the packet of a group id identical time stamp information; Perhaps data burst is one group of packet that carries out the processing of RLC serial connection simultaneously; Perhaps data burst is a packet;
Step S304, for each packet, first network element sends packet to its at least one lower network element, carry the data burst sequence number of packet correspondence in the packet, so that happening suddenly to data, at least one lower network element carries out the sequence loss detection, in addition, can also carry following information in this packet: timestamp, sequence number, the cumulative data packet length, and, for each lower network element, under the discontinuous situation of data burst sequence number of the packet correspondence of its reception, determine that the pairing data burst of data burst sequence number of disappearance is the data burst of losing.
The technical scheme that provides by the embodiment of the invention, by each data burst is provided with the data burst sequence number, and the data burst sequence number for being provided with on each package identification in this data burst, detect the data burst of losing.
Wherein, upper strata network element (that is, first network element mentioned above) and lower network element can be the compound modes of following network element, but are not limited to following combination:
Combination one, in the networking of the MBMS of UTRAN system service synchronization, the upper strata network element is upper strata RNC, lower network element is the RNC of lower floor, and wherein, the interface between upper strata network element and lower network element is the Iur interface, in this combination, the upper strata network element is the identical network element of physical function with lower network element.
Combination two, in the networking of the MBMS of HSPA+ service synchronization, the upper strata network element is RNC or master NodeB+ (master NB+), lower network element is slave NodeB+ (slave NB+), wherein, interface between upper strata network element and lower network element is the Iur interface, and in this combination, upper strata network element and lower network element be the different network element of logic function for physical function is identical.
Combination three, in the networking of the MBMS of LTE system service synchronization, the upper strata network element is MGW or MCE, and lower network element is ENB (E-UTRAN NodeB), and wherein, the interface between upper strata network element and lower network element is the M2 interface.
The embodiment of the invention is on the synchronous implementation method of MBMS as shown in Figure 2 basis, prior art is improved, in step S202, the upper strata network element is provided with the data burst sequence number to each data burst (data burst) of MBMS business, and the data burst sequence number (data burst sequencenumber) for being provided with on all package identifications in this data burst, be about to all and belong to data burst sequence number identical on the package identification of same data burst.Particularly, can carry this data burst sequence number information, perhaps, in MBMS service synchronization layer (SYNC) protocol header, increase field and carry this data burst sequence number information by in the GTP-U protocol header, increasing protocol fields.
Particularly, being provided with of data burst sequence number can be distributed according to following manner.
S
N+1=(S
n+ 1) MOD M, wherein, S
N+1Be the data burst sequence number of (n+1) individual data burst, S
nBe the data burst sequence number of n data burst, n is a natural number, S
nFor more than or equal to 0 integer, M is the maximum of described data burst sequence number, and MOD is for carrying out modulo operation.
By to data burst sequence number identical on the package identification that belongs to same data burst, lower network element is to receiving business data packet, only need to detect the data burst sequence number of this business data packet, for a plurality of business data packet of carrying identical data burst sequences number, then these a plurality of business data packet of explanation belong to same data burst, a plurality of business data packet for carrying different pieces of information burst sequences number illustrate that then these a plurality of business data packet belong to different data bursts.For example, data burst shown in Figure 4 and data, packet sequence number n distributes to n+4 and belongs to data burst m, m+1, m+2.Then the upper strata network element is at packet n and n+1 marked price data burst sequence number m, to packet n+2 and n+3 flag data burst sequences m+1, to packet n+4 flag data burst sequences m+2.
In addition, lower network element can detect whether lost whole data burst by detecting the data burst sequence number, if lower network element receives the packet that has identified current data burst sequences number, and do not receive any packet of the previous data burst sequence number that has identified this current data burst sequence number, think that then all packets in the data burst that has identified previous data burst sequence number all lose, for example, it is all packets of 1 that lower network element at first receives data sequence number, receive data sequence number then and be all packets of 3, but do not receive data sequence number and be any packet of 2, think that then the identification data sequence number is all data-bag losts in 2 the data burst.
In example as shown in Figure 5, packet n+2 and the n+3 of data burst m+1 lose, then lower network element receives only the packet that the data burst sequence number is m and m+2, and lower network element can the judgment data sequence number be all data-bag losts of the data burst of m+1 at this moment.
Device embodiment
According to the embodiment of the invention, provide a kind of checkout gear of loss of burst sequences.
Fig. 6 shows the checkout gear according to the loss of burst sequences of the embodiment of the invention, and as shown in Figure 6, this device comprises module 10 and sending module 20 are set.
Below describe the function of above-mentioned each module in detail.
Module 10 is set, is positioned at upper strata network element side, be used to each data burst that the data burst sequence number is set, and be data burst sequence number on each package identification in the data burst;
Sending module 20 is positioned at upper strata network element side, is used for sending packet at least one lower network element, carries the data burst sequence number of packet correspondence in the packet, and this module can be connected to module 10 is set.
Particularly, the above-mentioned module 10 that is provided with can utilize formula S n+1=(Sn+1) MOD M that the data burst sequence number of data burst is set, wherein, Sn+1 is the data burst sequence number of (n+1) individual data burst, Sn is the data burst sequence number of n data burst, and n is a natural number, and Sn is the integer more than or equal to 0, M is the maximum of data burst sequence number, and MOD is for carrying out modulo operation.
Preferably, this device also comprises the processing module (not shown), be positioned at the lower network element side, be used under the discontinuous situation of data burst sequence number of the packet correspondence that receives, determine that the pairing data burst of data burst sequence number of disappearance is the data burst of losing.
As mentioned above, detection method and/or device by means of loss of burst sequences provided by the invention, by each data burst is provided with the data burst sequence number, and the data burst sequence number for being provided with on each package identification in this data burst, detect the data burst of losing.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the detection method of a loss of burst sequences is characterized in that, comprising:
First network element is each data burst distribute data burst sequences number, and is the above the data burst sequence number of each package identification in the described data burst;
For each packet, described first network element sends packet to its at least one lower network element, carries the data burst sequence number of described packet correspondence in the described packet.
2. method according to claim 1 is characterized in that, described first network element comprises for each data burst is provided with the data burst sequence number:
S
N+1=(S
n+ 1) MOD M, wherein, S
N+1Be the data burst sequence number of (n+1) individual data burst, S
nBe the data burst sequence number of n data burst, n is a natural number, S
nFor more than or equal to 0 integer, M is the maximum of described data burst sequence number, and MOD is for carrying out modulo operation.
3. method according to claim 1 is characterized in that, the processing of carrying the data burst sequence number of described packet correspondence in the described packet comprises:
In the GTP-U of described packet protocol header, carry described data burst sequence number; Perhaps
In the SYNC of described packet protocol header, carry described data burst sequence number.
4. according to each described method in the claim 1 to 3, it is characterized in that, described packet further comprise following one of at least: timestamp, sequence number, cumulative data packet length.
5. according to each described method in the claim 1 to 3, it is characterized in that described data burst is the packet of a group id identical time stamp information; Perhaps described data burst is one group and carries out the packet that Radio Link control serial connection is handled.
6. according to each described method in the claim 1 to 3, it is characterized in that,
It is one of following that described first network element comprises: the host node of the master control radio network controller of the multimedia gateway of long evolving system, universal land radio access web, the high-speed packet access system of enhancing adds;
It is one of following that described lower network element comprises: the slave node of the subordinate radio network controller of the enode b of long evolving system, universal land radio access web, the high-speed packet access system of enhancing adds.
7. according to each described method in the claim 1 to 3, it is characterized in that described method also comprises:
For each lower network element, under the discontinuous situation of data burst sequence number of the described packet correspondence of its reception, determine that the pairing data burst of data burst sequence number of disappearance is the data burst of losing.
8. the checkout gear of a loss of burst sequences is characterized in that, comprising:
Module is set, is positioned at the first network element side, be used to each data burst distribute data burst sequences number, and be the above the data burst sequence number of each package identification in the described data burst;
Sending module is positioned at the first network element side, is used for sending packet to its at least one lower network element, carries the data burst sequence number of described packet correspondence in the described packet.
9. device according to claim 8 is characterized in that, the described module that is provided with is utilized formula S
N+1=(S
n+ 1) MOD M is provided with the data burst sequence number of data burst, wherein, and S
N+1Be the data burst sequence number of (n+1) individual data burst, S
nBe the data burst sequence number of n data burst, n is a natural number, S
nFor more than or equal to 0 integer, M is the maximum of described data burst sequence number, and MOD is for carrying out modulo operation.
10. according to Claim 8 or 9 described devices, it is characterized in that, described device also comprises processing module, be positioned at described lower network element side, be used under the discontinuous situation of data burst sequence number of the described packet correspondence that receives, determine that the pairing data burst of data burst sequence number of disappearance is the data burst of losing.
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| CN200810135161A CN101651517A (en) | 2008-08-13 | 2008-08-13 | Method and device for detecting loss of burst sequences |
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| CN200810135161A CN101651517A (en) | 2008-08-13 | 2008-08-13 | Method and device for detecting loss of burst sequences |
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| CN105451265A (en) * | 2014-08-29 | 2016-03-30 | 中国移动通信集团公司 | Processing method, device and terminal for multi-user downlink data |
| CN106716337A (en) * | 2016-07-01 | 2017-05-24 | 深圳市大疆创新科技有限公司 | Data interaction method, data recorder and unmanned device |
| WO2017193835A1 (en) * | 2016-05-11 | 2017-11-16 | Huawei Technologies Co., Ltd. | System and method for maintaining synchronization in connectionless transmissions |
| CN111078466A (en) * | 2019-11-13 | 2020-04-28 | 福建京奥通信技术有限公司 | Sensor data loss analysis method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105451265A (en) * | 2014-08-29 | 2016-03-30 | 中国移动通信集团公司 | Processing method, device and terminal for multi-user downlink data |
| WO2017193835A1 (en) * | 2016-05-11 | 2017-11-16 | Huawei Technologies Co., Ltd. | System and method for maintaining synchronization in connectionless transmissions |
| US20170332435A1 (en) * | 2016-05-11 | 2017-11-16 | Futurewei Technologies, Inc. | System and Method for Maintaining Synchronization in Connectionless Transmissions |
| US10492099B2 (en) | 2016-05-11 | 2019-11-26 | Futurewei Technologies, Inc. | System and method for maintaining synchronization in connectionless transmissions |
| AU2017262892B2 (en) * | 2016-05-11 | 2020-02-06 | Huawei Technologies Co., Ltd. | System and method for maintaining synchronization in connectionless transmissions |
| US10979934B2 (en) | 2016-05-11 | 2021-04-13 | Futurewei Technologies, Inc. | System and method for maintaining synchronization in connectionless transmissions |
| CN106716337A (en) * | 2016-07-01 | 2017-05-24 | 深圳市大疆创新科技有限公司 | Data interaction method, data recorder and unmanned device |
| CN106716337B (en) * | 2016-07-01 | 2020-01-17 | 深圳市大疆创新科技有限公司 | Data interaction method, data recorder and unmanned equipment |
| CN111078466A (en) * | 2019-11-13 | 2020-04-28 | 福建京奥通信技术有限公司 | Sensor data loss analysis method and system |
| CN111078466B (en) * | 2019-11-13 | 2023-04-07 | 福建京奥通信技术有限公司 | Sensor data loss analysis method and system |
| CN111279728A (en) * | 2020-01-22 | 2020-06-12 | 焦旭 | Internet of things data acquisition and packaging device and method |
| WO2021147021A1 (en) * | 2020-01-22 | 2021-07-29 | 北京微动数联科技有限公司 | Internet of things data acquisition and encapsulation apparatus and method |
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Application publication date: 20100217 |