CN101494873B - Method for listening wireless real time multi-channel data packet in domain network - Google Patents
Method for listening wireless real time multi-channel data packet in domain network Download PDFInfo
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- CN101494873B CN101494873B CN2009100788998A CN200910078899A CN101494873B CN 101494873 B CN101494873 B CN 101494873B CN 2009100788998 A CN2009100788998 A CN 2009100788998A CN 200910078899 A CN200910078899 A CN 200910078899A CN 101494873 B CN101494873 B CN 101494873B
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Abstract
The invention relate to a wireless real time multichannel data packet monitoring method in personal area network, belonging to the wireless communication technology field. The method comprises: receiving radio-frequency signal in wireless channel by antenna; performing down conversion sampling to obtain baseband signal; performing digital mudulation processing to obtain data packet; adding time mark and channel sequence number respectively to every data packet to obtain data packet with mark; receiving data packets with marks from N channels circularly in the set monitoring time quantum threshold; merging all the data packets into a sequence of data packets with marks; performing filtering operation and ordering classification to obtain the data packet sequence needed by the monitor; and displaying. The advantages of the monitoring method are: it achieves high flexibility, rather high scalability and versatility, can realize a plurality of wireless channel monitoring simultaneously, and can reduce the complexity for debugging mass wireless network especially frequency hopping network.
Description
Technical field
The present invention relates to wireless real time multi-channel packet monitor method in a kind of the territory net, belong to the wireless communication technique field.
Background technology
In the exploitation of Wireless Personal Network and test, need analyze data, collect with a wireless data packet monitoring system and observe after radiofrequency signal in the wireless channel is handled it and analyze.Because wireless telecommunications will utilize radiofrequency signal to transmit, be difficult to observe with other means, so the wireless data packet monitoring system is to the exploitation of wireless communication networks and test extremely important.
The wireless data packet monitoring system is independent of outside the Wireless Personal Network, utilizes reliable receiver that radiofrequency signal is carried out receiving demodulation and reverts to digital signal, and digital signal is carried out certain processing, it is shown according to certain rule be convenient to observation and analysis.Traditional wireless data packet monitor method is equivalent to a wireless signal receiver, the radiofrequency signal of a certain frequency is carried out the down-conversion sampling obtain baseband signal, again baseband signal is done the digital demodulation processing and obtains packet, packet is shown, as Fig. 1 again.This monitor method can be finished the monitoring to a wireless channel, if changing wireless channel will be configured it again, if all have radiofrequency signal just can't finish the monitoring work of whole wireless channels at a plurality of wireless channels simultaneously, and lack processing capacity to packet.
Raising along with the wireless communication networks complexity, data volume increases, and often exists the different radio channel network to work simultaneously, and frequency hopping also more and more is applied in the wireless communication networks, in exploitation and test to wireless communication networks, may there be following demand in the wireless monitor system:
1, can monitor a plurality of wireless channels simultaneously;
2, the unified time sign is arranged between the packet of different radio channel;
3, to the preliminary treatment of mass data bag, along with increasing of data volume, it is very inconvenient that mass data is observed, and need effectively filter ordering, and the processing of classification to packet.
Therefore traditional wireless monitor method can not satisfy the needs of new technology, needs the wireless data packet monitor method that upgrades.
Summary of the invention
The objective of the invention is to propose wireless real time multi-channel packet monitor method in a kind of the territory net, the signal of a plurality of wireless channels of monitoring that can be real-time, unification is handled and is resolved a plurality of wireless channel signals.By this method, the demonstration that the signal on the different radio channel is orderly reaches the purpose of real-time monitoring multi-channel wireless network.
Wireless real time multi-channel packet monitor method in the individual territory net that the present invention proposes comprises following each step:
(1) packet of N channel in the reception territory net, N channel is designated as C
1, C
2... C
N
(2) in the packet of above-mentioned reception, add time mark and channel designator C
i(i=1 2...N), obtains the packet of tape label, and wherein time mark represents to receive the time of packet;
(3) in listening period T, receive the packet of tape label in the above-mentioned N channel successively, obtain the sequence of data packet A of tape label
j={ P
J1, P
J2...
, wherein listening period T is less than twice continuous minimum interval that sends packet of any one channel, and j represents from monitoring the listening period number of times of zero-time to current listening period, M
jThe packet number that has mark in interior N the channel of expression current monitoring period, M
j≤ N;
(4) set a listening period section threshold value, with the listening period section threshold ratio of above-mentioned monitoring period T * j and setting, if monitor period T * j less than listening period section threshold value, then repeating step (1) is to (3), survey period T * j greater than listening period section threshold value if monitor, the sequence of data packet that then will monitor all tape labels in period T * j merges, and obtains the sequence of data packet of tape label, is designated as S={A
1, A
2... A
K, wherein K is for monitoring the number of times of the listening period in the period;
(5) the listening period section of setting according to the prison hearer is filtered by listening period the sequence of data packet S of above-mentioned tape label, with the not packet filtering in the listening period section, obtains the sequence of data packet behind the temporal filtering;
(6) monitor channel of setting according to the prison hearer filters by monitor channel above-mentioned filtered data packet sequence, with the not packet filtering in monitor channel, obtains channel filtered data packet sequence;
(7) above-mentioned channel filtered data packet sequence is sorted by the time order and function that receives packet, by channel designator sequence of data packet is split again, obtain supervising the sequence of data packet of the required channel of hearer.
Wireless real time multi-channel packet monitor method in the individual territory net that the present invention proposes has the following advantages:
1, can monitor any wireless channel in the Wireless Personal Network among the present invention, have very high flexibility;
2, the present invention utilizes the signal in the wireless receiver monitoring wireless channel independently, mutually between not influence, can adjust the number of channel of monitoring as required, make system that very high extensibility be arranged;
3, the present invention does not require for concrete radiofrequency signal, just can monitor signal according to the method that the present invention describes as long as wireless receiver can be received signal, therefore has very high versatility;
4, the present invention utilizes the method that multichannel receives simultaneously, can realize monitoring simultaneously a plurality of wireless channels, can reduce the especially complexity of frequency hopping network of debugging large-scale wireless network, has very high advance.
Description of drawings
Fig. 1 is traditional wireless data packet monitoring system schematic diagram.
Fig. 2 is the directions of signal flow schematic diagram of wireless real time multi-channel packet monitor method in the individual territory net that proposes of the present invention.
Embodiment
Wireless real time multi-channel packet monitor method in a kind of the territory net that the present invention proposes, at first receive radiofrequency signal in a plurality of wireless channels by antenna, radiofrequency signal is carried out the down-conversion sampling obtain baseband signal, baseband signal is carried out numeral mediates reason and obtains packet, packet to each channel adds time mark and channel designator respectively, obtain the packet of tape label, circulation receives the tagged data bag of N channel in the listening period section threshold value of setting, all packets are merged, obtain the sequence of data packet of whole tape labels, then the sequence of data packet of whole tape labels is carried out filter operation and obtain the filtered data packet sequence, the sort operation of deconsolidation process obtains supervising the sequence of data packet that the hearer needs to the filtered data packet sequence, will supervise the sequence of data packet demonstration that the hearer needs at last.
Wireless real time multi-channel packet monitor method in the net of of the present invention territory, its directions of signal flow schematic diagram as shown in Figure 1, snoop procedure comprises following steps:
(1) packet of N channel in the reception territory net, N channel is designated as C
1, C
2... C
N
(2) in the packet of above-mentioned reception, add time mark and channel designator C
i(i=1 2...N), obtains the packet of tape label, and wherein time mark represents to receive the time of packet;
(3) in listening period T, receive the packet of tape label in the above-mentioned N channel successively, obtain the sequence of data packet A of tape label
i={ P
I1, P
I2... P
IMi, wherein listening period T is less than twice continuous minimum interval that sends packet of any one channel, and i represents from monitoring the listening period number of times of zero-time to current listening period, M
iThe packet number that has mark in interior N the channel of expression current monitoring period, M
i≤ N;
(3) set a listening period section threshold value, with the listening period section threshold ratio of above-mentioned monitoring period T * i and setting, if monitor period T * i less than listening period section threshold value, then repeating step (1) is to (3), survey period T * i greater than listening period section threshold value if monitor, the sequence of data packet that then will monitor all tape labels in period T * i merges, and obtains the sequence of data packet of tape label, is designated as S={A
1, A
2... A
K, wherein K is for monitoring the number of times of the listening period in the period;
(4) the listening period section of setting according to the prison hearer is filtered by listening period the sequence of data packet S of above-mentioned tape label, with the not packet filtering in the listening period section, obtains the sequence of data packet behind the temporal filtering;
(5) monitor channel of setting according to the prison hearer filters by monitor channel above-mentioned filtered data packet sequence, with the not packet filtering in monitor channel, obtains channel filtered data packet sequence;
(6) above-mentioned channel filtered data packet sequence is sorted by the time order and function that receives packet, by channel designator sequence of data packet is split again, obtain supervising the sequence of data packet of the required channel of hearer.
Below introduce one embodiment of the present of invention in detail:
With a wireless real-time multi-channel data bag monitoring system based on the IEEE802.15.4 standard is example, IEEE802.15.4 standard code 2.4GHz frequency range one has 16 subchannels, port number N based on the wireless real-time multi-channel data bag monitoring system of IEEE802.15.4 standard is 16, is designated as C
1, C
2... C
16Corresponding 16 channels, can monitor simultaneously 16 subchannels, each passage uses a cover receiver, receiver comprises antenna, the down-conversion sampling processing, digital demodulation processing and timestamp and channel position are handled, the radiofrequency signal of a subchannel in the corresponding acceptance criteria of each receiver.
In snoop procedure, at first by the receiver received RF signal of 16 passages, the receiver of 16 passages is separate to guarantee the reception not influence mutually to each subchannel.Receiver carries out the down-conversion sampling processing to signal after receiving radiofrequency signal, obtain digital baseband signal, then digital baseband signal is carried out the operation that digital demodulation is handled, obtain the packet after the demodulation, add time mark and channel number before the packet after above-mentioned demodulation again, i.e. channel designator C
i(i=1,2...16), obtain the packet of tape label, wherein time mark represents to receive the moment of radiofrequency signal, each passage uses same clock reference to make time tag, the time of data packet transmission is unit with the microsecond, thus use the clock reference that is accurate to the microsecond level, to guarantee the accuracy of time tag.
The packet format of stipulating in the IEEE802.15.4 standard is:
| Packet length | The bag content |
| 1 byte | Be not less than 4 bytes (according to the packet length decision) |
Add before the packet after above-mentioned demodulation that the packet format that time mark and channel number obtain the packet of tape label is:
| Channel number | Time tag | Packet length | The bag content |
| 1 byte | 6 bytes | 1 byte | Be not less than 4 bytes (according to the packet length decision) |
Channel number is defined as 1 byte, can represent 16 passages, and time tag is defined as 6 bytes, is that unit can represent the time more than 8 years with the microsecond, can satisfy the monitoring needs under the various test case fully.
Stipulate in the IEEE802.15.4 standard that the shortest data packet transmission time of any one equipment is 160 microseconds, the minimum interval that sends packet for twice continuously is 128 microseconds, is 288 microseconds=128 microseconds+160 microseconds so two minimum intervals between the packet are received and handled to receiver.Whether have the time of packet less than minimum interval could guarantee all packet can both be in time handled, Gu each passage listening period is less than 18 microseconds=288 microseconds/16 if monitoring each passage.The longest packet of regulation is 127 bytes in the IEEE802.15.4 standard, so the packet of tape label is the longest to be 134 bytes, add that time system is less than 18 microseconds from the time that receiver reads this longest packet, otherwise might some packet can not in time be handled and lose.
According to above-mentioned condition, be designed to 12 microseconds from the receiver read data packet time, system can finish reading 134 byte data bags in 12 microseconds; Listening period T is set at 192 microseconds, less than calculated value, can satisfy all packets and can in time be handled.Whether have the packet of tape label, the packet of tape label is merged into the sequence of data packet A of tape label if in listening period T, monitoring 16 passages successively
i={ P
I1, P
I2... P
IMi, M
iHave the packet number of mark in interior 16 passages of expression current monitoring period, not necessarily whole 16 passages can both receive packet in same listening period, so M
i≤ N, i represent the listening period number of times from system's operation starting time to current time.Set a listening period section threshold value, this threshold value is the integral multiple of listening period T, with the listening period section threshold ratio of above-mentioned monitoring period T * i and setting, if monitor period T * i less than listening period section threshold value, then repeat to receive and snoop procedure, survey period T * i greater than listening period section threshold value if monitor, the sequence of data packet that then will monitor all tape labels in period T * i merges, obtain the sequence of data packet of tape label, be designated as S={A
1, A
2... A
K, wherein K is for monitoring the number of times of the listening period in the period.
Illustrate, suppose to wish to monitor 1 millisecond of internal channel C
1, C
2, C
3, C
4, C
5, C
6, C
7, C
8Radiofrequency signal, listening period T is 192 microseconds, monitors the integral multiple that the period threshold value should be listening period T, monitors the minimum 192 microseconds * 6=1152 microsecond of getting of period threshold value, greater than 1 millisecond, monitors the number of times K=6 of listening period in the period.System's operation starting time is made as prison hearer monitoring zero hour of wishing, begins to circulate after system's operation to carry out the process of above-mentioned reception and monitoring.If 3 channel C are successively arranged
5, C
7, C
2Radiofrequency signal, carrying out marking operation postscript after receiver is received is F
5, F
7, F
2In first listening period T, monitor each passage successively, obtain the sequence of data packet A of tape label
1={ P
11, P
12, P
13}={ F
12, F
15, F
17; After first listening period was finished, T * i=192 * 1=192 microsecond less than monitoring the period threshold value, then began second listening period, and operation is with first listening period, and establishing second period successively has C
5, C
9, C
3, C
2Four passages are received packet, obtain the sequence of data packet A of tape label
2={ P
21, P
22, P
23, P
24}={ F
22, F
23, F
25, F
29; So circulation is monitored each passage and is monitored the period threshold value up to arriving, and carries out 6 listening periods altogether, obtains the sequence of data packet S={A of whole tape labels
1, A
2, A
3, A
4, A
5, A
6}={ F
12, F
15, F
17, F
22, F
23, F
25, F
29, F
42, F
43, F
47, F
48, F
411, F
52, F
57, F
58, F
63, F
65, F
68, F
611.Wherein the 3rd listening period do not received the data of any one passage.
Below packet among the sequence of data packet S of whole tape labels being filtered by the time, is example with the sequence S that gives an example above, and the time mark of packet among the checking sequence S successively is because the 6th listening period surpassed 1 millisecond time, F
63, F
68After 1 millisecond, receive, according to its time flag data bag F
63, F
68From sequence, delete, obtain the sequence of data packet behind the temporal filtering: { F
12, F
15, F
17, F
22, F
23, F
25, F
29, F
42, F
43, F
47, F
48, F
411, F
52, F
57, F
58, F
65, F
611.
Packet in the sequence of data packet behind the temporal filtering is pressed passage again and filtered, the channel position of packet in the review time filtered data packet sequence is not the passage display requirement C that sets with path marking successively
1, C
2, C
3, C
4, C
5, C
6, C
7, C
8Packet from sequence, delete, obtain passage filtered data packet sequence { F
12, F
15, F
17, F
22, F
23, F
25, F
42, F
43, F
47, F
48, F
52, F
57, F
58, F
65.
With the packet in the passage filtered data packet sequence according to this packet time mark from arriving first back ordering, obtain the sequence of data packet SC={F behind the time-sequencing
15, F
17, F
12, F
25, F
23, F
22, F
47, F
42, F
48, F
43, F
58, F
52, F
57, F
65.
If the prison hearer wishes to see the packet situation of 1～8 channel, the fractionation of setting requires to be passage 1～8.To split from small to large according to channel position in the sequence of data packet behind the time-sequencing, obtain the sequence of data packet that sequence of data packet after the ordering of passage of passage display requirement of 8 settings is promptly supervised the required channel of hearer:
SC
1＝{}；
SC
2＝{F
12，F
22，F
42，F
52}；
SC
3＝{F
23，F
43}；
SC
4＝{}；
SC
5＝{F
15，F
25，F
65}；
SC
6＝{}；
SC
7＝{F
17，F
47，F
57}；
SC
8＝{F
48，F
58，}；
The sequence of data packet that above-mentioned prison hearer is needed is pressed the channel position fractionation at last, and time sequencing shows, obtains following display result:
| Channel 1 | |
| Channel 2 | F 12 F 22 F 42 F 52 |
| Channel 3 | F 23 F 43 |
| Channel 4 | |
| Channel 5 | F 15 F 25 F 65 |
| Channel 6 | |
| Channel 7 | F 17 F 47 F 57 |
| Channel 8 | F 48 F 58 |
| Time | Time ruler |
Claims (1)
1. wireless real time multi-channel packet monitor method during net in one kind territory is characterized in that this method comprises following each step:
(1) packet of N channel in the reception territory net, N channel is designated as C
1, C
2... C
N
(2) in the packet of above-mentioned reception, add time mark and channel designator C
i(i=1 2...N), obtains the packet of tape label, and wherein time mark represents to receive the time of packet;
(3) in listening period T, receive the packet of tape label in the above-mentioned N channel successively, obtain the sequence of data packet of tape label
, wherein listening period T is less than twice continuous minimum interval that sends packet of any one channel, and j represents from monitoring the listening period number of times of zero-time to current listening period, M
jThe packet number that has mark in interior N the channel of expression current monitoring period, M
j≤ N;
(4) set a listening period section threshold value, with the listening period section threshold ratio of above-mentioned monitoring period T * j and setting, if monitor period T * j less than listening period section threshold value, then repeating step (1) is to (3), survey period T * j greater than listening period section threshold value if monitor, the sequence of data packet that then will monitor all tape labels in period T * j merges, and obtains the sequence of data packet of tape label, is designated as S={A
1, A
2... A
K, wherein K is for monitoring the number of times of the listening period in the period;
(5) the listening period section of setting according to the prison hearer is filtered by listening period the sequence of data packet S of above-mentioned tape label, with the not packet filtering in the listening period section, obtains the sequence of data packet behind the temporal filtering;
(6) monitor channel of setting according to the prison hearer filters by monitor channel above-mentioned filtered data packet sequence, with the not packet filtering in monitor channel, obtains channel filtered data packet sequence;
(7) above-mentioned channel filtered data packet sequence is sorted by the time order and function that receives packet, by channel designator sequence of data packet is split again, obtain supervising the sequence of data packet of the required channel of hearer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100788998A CN101494873B (en) | 2009-03-06 | 2009-03-06 | Method for listening wireless real time multi-channel data packet in domain network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100788998A CN101494873B (en) | 2009-03-06 | 2009-03-06 | Method for listening wireless real time multi-channel data packet in domain network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101494873A CN101494873A (en) | 2009-07-29 |
| CN101494873B true CN101494873B (en) | 2010-07-28 |
Family
ID=40925217
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100788998A Expired - Fee Related CN101494873B (en) | 2009-03-06 | 2009-03-06 | Method for listening wireless real time multi-channel data packet in domain network |
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| CN (1) | CN101494873B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104202762B (en) * | 2014-09-16 | 2017-11-24 | 西安航天自动化股份有限公司 | A kind of time slot letter, which is jumped, monitors checking system and verification method |
| CN105392053A (en) * | 2015-12-11 | 2016-03-09 | 上海纬而视科技股份有限公司 | Method for receiving and processing network video streams in real time |
| CN107294569B (en) * | 2016-03-30 | 2022-03-15 | 景略半导体(上海)有限公司 | Multi-antenna transmission, single-antenna transmission, and omni-directional wireless receiving system and method |
| CN109257730B (en) * | 2018-10-22 | 2021-07-13 | 每日互动股份有限公司 | Channel signal acquisition method and equipment thereof |
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2009
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