CN102088335A - Method and device for determining time delay of data service - Google Patents
Method and device for determining time delay of data service Download PDFInfo
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Abstract
The invention discloses a method and device for determining time delay of data service, which are applied in the field of communication. The method comprises the following steps of: collecting a data packet and determining whether the type of the data packet is a request message or not, turning to B if the data packet is a request message, otherwise turning to C; B, adding a recording item of the data packet in a key word mapping table, and turning to A; C, judging whether the data packet is a retransmitted packet, accumulating the packet retransmission time on total time delay if the data packet is the retransmitted packet, and turning to A, otherwise turning to D; D, judging whether the data packet is the last packet, determining the total time delay if the data packet is the last packet, otherwise turning to E; and E, determining whether the keyword of the data packet is saved in the keyword mapping table or not, turning to A if the keyword of the data packet is not saved in the keyword mapping table, otherwise judging whether the source IP (Internet Protocol) of the data packet is the same as the source IP of the request message in the keyword mapping table or not, accumulating the transfer time delay of the data packet and the total time delay saved at a wireless side if the source IP of the data packet is the same as the source IP of the request massage in the keyword mapping table, and turning to A to execute. The method and the device provided by the invention determine the part to be optimized at the wireless side according to the time delay at a network side and the time delay at the wireless side.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and device of specified data service delay.
Background technology
Along with the development of mobile data services, dramatic change has taken place in people's communication mode, and the data in mobile phone business substitutes traditional speech business gradually.Along with data service is more widely-used, therefore press for the minimizing data delay, improve the data service speed of download, and then improve user's perceptibility.
The data service downloading process is that data in real time is sent to terminal from service end, and whole process relates to core-network side and wireless network side two parts, and wherein wireless network partly is a determination data service delay key component.In the available data network, data service is downloaded time delay and is mainly caused by wireless portion.The wireless side more complicated, and the network coverage, interference etc. all can influence wireless side time delay, so calculate relatively difficulty of wireless side time delay.The instability of wireless side can cause the wireless side packet loss, thereby causes that data service retransmits, and then increases data service download time delay.
The technical problem that prior art exists is: do not having a kind of accurate Calculation data service to download the method for time delay at present.
Summary of the invention
The invention provides a kind of method and device of specified data service delay, solve in the prior art problem of can not the accurate Calculation data service downloading time delay.
The embodiment of the invention provides a kind of method of specified data service delay, comprising:
A, image data bag also judge whether the data type that collects packet is request message, if, then change step B, otherwise execution in step C;
B, obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore,, then in the keyword mapping table, add the entry of this packet if do not have; Otherwise, and change steps A over to the entry zero clearing of original keyword correspondence;
C, judge whether described packet is retransmission packet, if, then obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore, if have, then the transfer delay with this packet adds up with wireless side overall delay and the retransmission delay time preserved respectively, and changes steps A over to after accumulation result upgraded the wireless side overall delay preserved and retransmission delay time, wherein, the transfer delay of this packet is the time that collects packet to deduct the time that previous packet collects; If not retransmission packet, then change step D over to;
D, judge whether the packet receive is last bag data of data flow, if then to transmit total duration be the initial time started that deducts time of receiving this packet record to specified data stream; Otherwise, change step e;
E, obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore,, then change steps A and carry out if do not have; Otherwise, whether the source IP that judges the request message that writes down in this source data packet IP and the keyword mapping table identical, if identical, then with the transfer delay of this packet with preserve the wireless side overall delay and add up, and use accumulation result and upgrade the wireless side overall delay of preserving, change steps A and carry out.
A kind of device of specified data service delay comprises data type judge module, initialization module, retransmission packet judge module, time delay determination module, keyword comparison module and network condition determination module:
The data type judge module is used for the image data bag and judges whether the data type that collects packet is request message, if then change initialization module over to, otherwise change the retransmission packet processing module over to;
Initialization module is used for obtaining the keyword of packet, and whether preserves this keyword in the keyword mapping table of determining to prestore, if do not have, then adds the entry of this packet in the keyword mapping table; Otherwise, and change the data type judging module over to the entry zero clearing of original keyword correspondence;
The retransmission packet processing unit module, if be used for determining that described packet is a retransmission packet, then obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore, if have, then the transfer delay with this packet adds up with wireless side overall delay and the retransmission delay time preserved respectively, and change the data type judging module over to behind wireless side overall delay that accumulation result upgrade is preserved and the retransmission delay time, wherein, the transfer delay of this packet is the time that collects packet to deduct the time that previous packet collects; If not retransmission packet, then change the time delay determination module over to;
The time delay determination module is used to judge whether the packet that receives is last bag data of data flow, if then to transmit total duration be the initial time started that deducts time of receiving this packet record to specified data stream; Otherwise, change the keyword comparison module over to;
The keyword comparison module is used for obtaining the keyword of packet, and whether preserves this keyword in the keyword mapping table of determining to prestore, if do not have, then revolution is carried out according to type judging module; Otherwise, whether the source IP that judges the request message that writes down in this source data packet IP and the keyword mapping table identical, if identical, then with the transfer delay of this packet with preserve the wireless side overall delay and add up, and use accumulation result and upgrade the wireless side overall delay of preserving, revolution is carried out according to type judging module.
Method and apparatus provided by the invention can realize the professional average delay of data, wireless side time delay accounting, core-network side time, wireless packet loss are produced the accurate Calculation of packet retransmission delay time.And by problematic wireless side sub-district, the accurate location of above-mentioned time delay result, thereby definite wireless side need be optimized part.
Description of drawings
Fig. 1 is the flow chart of the method for a kind of specified data service delay of the embodiment of the invention;
Fig. 2 judges in the embodiment of the invention whether described packet is the flow chart of retransmission packet;
Fig. 3 is that the method for a kind of specified data service delay in the embodiment of the invention is if based on the flow chart of WAP1.x data;
Fig. 4 is that the method for a kind of specified data service delay in the embodiment of the invention is if based on the flow chart of WAP2.0 data;
The structure chart of the device of a kind of specified data service delay of Fig. 5 embodiment of the invention;
The structure chart of Fig. 6 embodiment of the invention retransmission packet judge module.
Embodiment
The embodiment of the invention provides a kind of method of specified data service delay, comprising: whether the data type of the packet that A, judgement collect is request message, if, then change step B, otherwise execution in step C; B, obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore, if have, then in the keyword mapping table with the entry zero clearing of described keyword correspondence, and the time record that will the gather described packet zero-time that begins to transmit for data flow, and change steps A over to; C, judge whether described packet is retransmission packet, if, then obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore, if have, then the transfer delay with this packet adds up with wireless side overall delay and the retransmission delay time preserved respectively, and changes steps A over to after accumulation result upgraded the wireless side overall delay preserved and retransmission delay time, wherein, the transfer delay of this packet is the time that collects packet to deduct the time that previous packet collects; If not retransmission packet, then change step D over to; D, judge whether the packet receive is last bag data of data flow, if then to transmit total duration be the initial time started that deducts time of receiving this packet record to specified data stream; Otherwise, change step e; E, obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore,, then change steps A and carry out if do not have; Otherwise, whether the source IP that judges the request message that writes down in this source data packet IP and the keyword mapping table identical, if identical, then with the transfer delay of this packet with preserve the wireless side overall delay and add up, and use accumulation result and upgrade the wireless side overall delay of preserving, change steps A and carry out.
As shown in Figure 1, the embodiment of the invention provides a kind of method of specified data service delay, and concrete steps comprise:
Keyword in the embodiment of the invention can be made up of described source data packet IP, purpose IP, source port, destination interface, transaction ID.
Zero-time, the cell id that sends packet that entry in the table comprises that data flow begins to transmit insinuated in keyword described in the embodiment of the invention, terminal models, source data packet IP, wireless side overall delay, core-network side time delay, the data flow that receives packet transmits total duration.
In the invention process, cause the device of data delay in order further to determine network, the embodiment of the invention comprises that also it is the initial time started that deducts time of receiving this packet record that step 105 specified data stream transmits total duration, changes step 107 afterwards over to:
Comprise shown in the cell id that sends packet, the terminal models that receives packet etc. because insinuate entry in the table at embodiment of the invention keyword, according to comparative result determine network condition can:
Core side time delay, wireless side overall delay and data flow transmit total duration and determine whether network occurs unusually, determine that according to the cell id that sends packet unusual sub-district appears in network.
As shown in Figure 2, judge that in embodiments of the present invention whether described packet is that the concrete steps of retransmission packet comprise:
Step 201 is obtained sequence of data packet number, and uses the sequence number generation group bag keyword that gets access to;
Step 202 is judged the group bag keyword desired value whether the group bag keyword of current data packet equals to preserve, if then utilize the sequence number and the byte length group of current data packet and generate the group bag keyword desired value of next packet, process ends; Otherwise change step 203 over to;
Whether step 203, the group bag keyword of judging current data packet be less than the group bag desired value of preserving, if then definite described packet is a retransmission packet, and process ends; Otherwise, change step 204 over to;
Step 204 judges whether the group bag keyword of described packet equals out of order group of bag desired value, if then change step 205; Otherwise, change step 206;
Step 205, whether judge out of order group of bag keyword update times greater than preset value, if less than, then the group bag keyword of out of order bag being updated to the group bag keyword of current data packet, out of order group of bag keyword update times adds 1; Otherwise out of order group of bag desired value is revised as the group bag keyword of current data packet bag, the zero clearing of out of order group of bag keyword update times, and process ends;
Step 206, out of order group of bag keyword update times add 1, the out of order group of group bag keyword that the bag Key Word Adapted is a current data packet, and process ends.
As shown in Figure 3, the method for a kind of specified data service delay that the embodiment of the invention provided is if based on the WAP1.x data, and then concrete performing step comprises:
As shown in Figure 4, the method for a kind of specified data service delay that the embodiment of the invention provided is if based on the WAP2.0 data, and then concrete performing step comprises:
Step 401 is analyzed the data that collect, and reads a packet;
Whether step 402 is TCP according to IP layer protocol, if not, change step 401 and carry out; If change step 403 and carry out.
Step 404 judges whether HTTP layer type of message is GET or POST, if then change step 405 and handle; Otherwise changeing step 408 carries out
Step 406 is closed the corresponding TDR node of described KEY, newly creates a TDR event structure again, relevant informations such as time started, cell id, mobile phone model, source IP is inserted among the TDR, simultaneously with wireless side time delay, core-network side time delay, overall delay zero clearing; Changeing step 401 carries out
Step 407 is newly created a TDR event structure, relevant informations such as time started, cell id, mobile phone model, source IP is inserted among the TDR, simultaneously with wireless side time delay, core-network side time delay, overall delay zero clearing.Changeing step 401 carries out.
Step 408 searches according to KEY whether identical KEY node is arranged in breathing out rare table, if find, changes step 409 and carries out, otherwise, change step 401 and carry out.
Step 409 judges whether FIN is 1 among the flags in the TCP layer, if change step 410 and carry out.Otherwise change step 411 over to;
Step 410, incident of expression finish, the wireless time delay that wireless time delay equals to have write down and (time of ACK deducts the last bag packet time) add up and, this bag time is the TDR concluding time.Calculate TDR time duration, close this TDR, change step 401 over to and carry out.
Step 411 judges whether reset is 1 among the flags in the TCP layer, if, change step 410 and carry out, carry out otherwise change step 412
Whether the source IP of step 414, this message is identical with the source IP of GET or POST message, if identical, changes step 413 over to; Otherwise, change step 401 and carry out.
As shown in Figure 5, also provide a kind of device of specified data service delay according to the said method embodiment of the invention, comprise data type judge module 501, initialization module 502, retransmission packet processing module 503, time delay determination module 504, keyword comparison module 505 and network condition determination module 506:
Data type judge module 501 is used for the image data bag and judges whether the data type that collects packet is request message, if then change initialization module 502 over to, otherwise change retransmission packet processing module 503 over to;
Retransmission packet processing unit module 503, if be used for determining that described packet is a retransmission packet, then obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore, if have, then the transfer delay with this packet adds up with wireless side overall delay and the retransmission delay time preserved respectively, and change data type judging module 501 over to behind wireless side overall delay that accumulation result upgrade is preserved and the retransmission delay time, wherein, the transfer delay of this packet is the time that collects packet to deduct the time that previous packet collects; If not retransmission packet, then change time delay determination module 504 over to;
Time delay determination module 504, be used to judge whether the packet that receives is last bag data of data flow, if then the total duration of specified data stream transmission is the time that receives this packet to deduct the initial time started of record, and changes network condition determination module 506 over to; Otherwise, change keyword comparison module 505 over to;
In addition, for the sub-district of further determining to go wrong in the network, device then provided by the invention also comprises:
Network condition determination module 506, the data flow that is used for obtaining transmit total duration, wireless side overall delay and retransmission delay time and compare with preset value respectively, and determine network condition according to comparative result.
This device also comprises retransmission packet judge module 507, is used to judge whether the packet that collects is retransmission packet.
As shown in Figure 6, described retransmission packet judge module 507 comprises sequence number acquiring unit 601, group bag keyword comparing unit 602, retransmission packet determining unit 603, out of order group of bag desired value comparing unit 604, update times judging unit 605 and out of order group of bag keyword updating block 606:
Sequence number acquiring unit 601 is used to obtain sequence of data packet number, and uses the sequence number generation group bag keyword that gets access to;
Group bag keyword comparing unit 602, be used to judge the group bag keyword desired value whether the group bag keyword of current data packet equals to preserve, if then utilize the sequence number of current data packet and byte length group and generate the group bag keyword desired value of next packet, end operation; Otherwise change retransmission packet determining unit 603 over to;
Whether retransmission packet determining unit 603, the group bag keyword that is used to judge current data packet be less than the group bag desired value of preserving, if then definite described packet is a retransmission packet, and end operation; Otherwise, change out of order group of bag desired value comparing unit 604 over to;
Out of order group of bag desired value comparing unit 604 is used to judge whether the group bag keyword of described packet equals out of order group of bag desired value, if then change update times judging unit 605; Otherwise, change out of order group of bag keyword updating block 606 over to;
Whether update times judging unit 605 is used to judge out of order group of bag keyword update times greater than preset value, if less than, then the group bag keyword of out of order bag being updated to the group bag keyword of current data packet, out of order group of bag keyword update times adds 1; Otherwise out of order group of bag desired value is revised as the group bag keyword of current data packet bag, the zero clearing of out of order group of bag keyword update times, and end operation;
Out of order group of bag keyword updating block 606, out of order group of bag keyword update times add 1, the out of order group of group bag keyword that the bag Key Word Adapted is a current data packet, and end operation.
Method and apparatus provided by the invention can realize the professional average delay of data, wireless side time delay accounting, core-network side time, wireless packet loss are produced the accurate Calculation of packet retransmission delay time.And by problematic wireless side sub-district, the accurate location of above-mentioned time delay result, thereby definite wireless side need be optimized part.
The invention process binding data network service characteristics are carried out time-delay analysis, so that operator carries out the miscellaneous service analysis, complain system as fault, fault location system etc., thus satisfy Virtual network operator to network operation, optimization.
In addition, method and apparatus provided by the invention is analyzed data service download time delay from sub-district and terminal models two aspects, and time delay comprises the time delay that retransmission packet produces.Judge network condition according to time delay and retransmission packet analysis result, network is optimized the bigger sub-district of time delay again.According to measurement result, can adjust the network planning and business game, thereby improve resource utilization, make the demand that the network planning and business game are more realistic.
Method of the present invention is not limited to the embodiment described in the embodiment, and those skilled in the art's technical scheme according to the present invention draws other execution mode, belongs to technological innovation scope of the present invention equally.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the method for a specified data service delay is characterized in that, comprising:
A, image data bag also judge whether the data type that collects packet is request message, if, then change step B, otherwise execution in step C;
B, obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore,, then in the keyword mapping table, add the entry of this packet if do not have; Otherwise, and change steps A over to the entry zero clearing of original keyword correspondence;
C, judge whether described packet is retransmission packet, if, then obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore, if have, then the transfer delay with this packet adds up with wireless side overall delay and the retransmission delay time preserved respectively, and changes steps A over to after accumulation result upgraded the wireless side overall delay preserved and retransmission delay time, wherein, the transfer delay of this packet is the time that collects packet to deduct the time that previous packet collects; If not retransmission packet, then change step D over to;
D, judge whether the packet receive is last bag data of data flow, if then to transmit total duration be the initial time started that deducts time of receiving this packet record to specified data stream; Otherwise, change step e;
E, obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore,, then change steps A and carry out if do not have; Otherwise, whether the source IP that judges the request message that writes down in this source data packet IP and the keyword mapping table identical, if identical, then with the transfer delay of this packet with preserve the wireless side overall delay and add up, and use accumulation result and upgrade the wireless side overall delay of preserving, change steps A and carry out.
2. the method for claim 1 is characterized in that, it is to deduct after the initial time started of record the time that receives this packet that step D specified data stream transmits total duration, changes step F over to:
F, the data flow that obtains is transmitted total duration, wireless side overall delay and retransmission delay time compare with preset value respectively, and determine network condition according to comparative result.
3. the method for claim 1 is characterized in that, described keyword comprises described source data packet IP, purpose IP, source port number, destination slogan and transaction ID.
4. method as claimed in claim 2, it is characterized in that zero-time, the cell id that sends packet that entry in the table comprises that data flow begins to transmit insinuated in described keyword, terminal models, source data packet IP, wireless side overall delay, core-network side time delay, the data flow that receives packet transmits total duration.
5. method as claimed in claim 4, it is characterized in that, determine that according to comparative result network condition comprises in the described step F: core side time delay, wireless side overall delay and data flow transmit total duration and determine whether network occurs unusually, if unusual, then determine to occur unusual sub-district according to the cell id that sends packet.
6. the method for claim 1 is characterized in that, judges whether described packet is that retransmission packet comprises:
A, obtain sequence of data packet number, and use the sequence number generation group bag keyword that gets access to;
B, judge the group bag keyword desired value whether the group bag keyword of current data packet equals to preserve, if then utilize the sequence number and the byte length group of current data packet and generate the group bag keyword desired value of next packet, process ends; Otherwise change step c over to;
C, judge current data packet group bag keyword whether less than the group bag desired value of preserving, if determine that then described packet is a retransmission packet, and process ends; Otherwise, change steps d over to;
D, judge whether the group bag keyword of described packet equals out of order group of bag desired value, if then change step e; Otherwise, change step f;
E, whether judge out of order group of bag keyword update times greater than preset value, if less than, then the group bag keyword of out of order bag being updated to the group bag keyword of current data packet, out of order group of bag keyword update times adds 1; Otherwise out of order group of bag desired value is revised as the group bag keyword of current data packet bag, the zero clearing of out of order group of bag keyword update times, and process ends;
F, out of order group of bag keyword update times add 1, the out of order group of group bag keyword that the bag Key Word Adapted is a current data packet, and process ends.
7. the device of a specified data service delay is characterized in that, comprises data type judge module, initialization module, retransmission packet judge module, time delay determination module, keyword comparison module and network condition determination module:
The data type judge module is used for the image data bag and judges whether the data type that collects packet is request message, if then change initialization module over to, otherwise change the retransmission packet processing module over to;
Initialization module is used for obtaining the keyword of packet, and whether preserves this keyword in the keyword mapping table of determining to prestore, if do not have, then adds the entry of this packet in the keyword mapping table; Otherwise, and change the data type judging module over to the entry zero clearing of original keyword correspondence;
The retransmission packet processing unit module, if be used for determining that described packet is a retransmission packet, then obtain the keyword in the packet, and whether preserve this keyword in the keyword mapping table of determining to prestore, if have, then the transfer delay with this packet adds up with wireless side overall delay and the retransmission delay time preserved respectively, and change the data type judging module over to behind wireless side overall delay that accumulation result upgrade is preserved and the retransmission delay time, wherein, the transfer delay of this packet is the time that collects packet to deduct the time that previous packet collects; If not retransmission packet, then change the time delay determination module over to;
The time delay determination module is used to judge whether the packet that receives is last bag data of data flow, if then to transmit total duration be the initial time started that deducts time of receiving this packet record to specified data stream; Otherwise, change the keyword comparison module over to;
The keyword comparison module is used for obtaining the keyword of packet, and whether preserves this keyword in the keyword mapping table of determining to prestore, if do not have, then revolution is carried out according to type judging module; Otherwise, whether the source IP that judges the request message that writes down in this source data packet IP and the keyword mapping table identical, if identical, then with the transfer delay of this packet with preserve the wireless side overall delay and add up, and use accumulation result and upgrade the wireless side overall delay of preserving, revolution is carried out according to type judging module.
8. device as claimed in claim 7 is characterized in that, also comprises:
Network condition determination module, the data flow that is used for obtaining transmit total duration, wireless side overall delay and retransmission delay time and compare with preset value respectively, and determine network condition according to comparative result.
9. device as claimed in claim 7 is characterized in that this device also comprises the retransmission packet judge module, is used to judge whether the packet that collects is retransmission packet.
10. device as claimed in claim 9, it is characterized in that this retransmission packet judge module comprises sequence number acquiring unit, group bag keyword comparing unit, retransmission packet determining unit, out of order group of bag desired value comparing unit, update times judging unit and out of order group of bag keyword updating block:
The sequence number acquiring unit is used to obtain sequence of data packet number, and uses the sequence number generation group bag keyword that gets access to;
Group bag keyword comparing unit, be used to judge the group bag keyword desired value whether the group bag keyword of current data packet equals to preserve, if then utilize the sequence number of current data packet and byte length group and generate the group bag keyword desired value of next packet, end operation; Otherwise change retransmission packet determining unit c over to;
Whether retransmission packet determining unit, the group bag keyword that is used to judge current data packet be less than the group bag desired value of preserving, if then definite described packet is a retransmission packet, and end operation; Otherwise, change out of order group of bag desired value comparing unit over to;
Out of order group of bag desired value comparing unit is used to judge whether the group bag keyword of described packet equals out of order group of bag desired value, if then change update times judging unit e; Otherwise, change out of order group of bag keyword updating block over to;
Whether the update times judging unit is used to judge out of order group of bag keyword update times greater than preset value, if less than, then the group bag keyword of out of order bag being updated to the group bag keyword of current data packet, out of order group of bag keyword update times adds 1; Otherwise out of order group of bag desired value is revised as the group bag keyword of current data packet bag, the zero clearing of out of order group of bag keyword update times, and end operation;
Out of order group of bag keyword updating block is used for out of order group of bag keyword update times added 1, the out of order group of group bag keyword that the bag Key Word Adapted is a current data packet, and end operation.
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| 秦勇 等: "TDMA时隙分配对业务时延性能的影响分析", 《电子学报》 * |
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