CN109413026B - Interception device, data receiving method thereof and readable storage medium - Google Patents
Interception device, data receiving method thereof and readable storage medium Download PDFInfo
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- CN109413026B CN109413026B CN201810986669.0A CN201810986669A CN109413026B CN 109413026 B CN109413026 B CN 109413026B CN 201810986669 A CN201810986669 A CN 201810986669A CN 109413026 B CN109413026 B CN 109413026B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/30—Network architectures or network communication protocols for network security for supporting lawful interception, monitoring or retaining of communications or communication related information
Abstract
An interception device and a data receiving method and a readable storage medium thereof, wherein the data receiving method of the interception device comprises the following steps: determining the type of a data packet to be received, wherein the type of the data packet to be received comprises at least one of the following: MU-MIMO packets, OFDMA packets; when the type of the data packet to be received is an OFDMA data packet, receiving the OFDMA data packet to be received by adopting all RUs corresponding to the OFDMA data packet; and when the type of the data packet to be received is an MU-MIMO data packet, receiving all spatial streams corresponding to the MU-MIMO data packet. By applying the scheme, the success rate of data packet interception can be improved.
Description
Technical Field
The embodiment of the invention relates to the field of communication, in particular to interception equipment, a data receiving method thereof and a readable storage medium.
Background
In a Wireless Local Area Network (WLAN) system, a Wireless Station device (STA) communicates with other devices through an Access Point device (AP). In order to facilitate testing and debug of the network, an interception device (Sniffer) may be placed between the AP and the STA. The Sniffer may intercept (i.e., intercept) all packets between the AP and the STA for debug and problem location.
In ieee802.11ax, in order to improve the performance of the WLAN network, technologies such as a downlink Multi-user Multiple Input Multiple Output (MU MIMO), Orthogonal Frequency Division Multiple Access (OFDMA) and the like are introduced.
In the prior art, the Sniffer can only intercept common data packets, such as non-MU MIMO and non-OFDMA data packets, which results in low success rate of data packet interception, and for MU-MIMO data packets or OFDMA data packets, only a Preamble (Preamble) part can be intercepted, which cannot provide complete data packet information, and the application scenario is limited.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is how to improve the success rate of data packet interception.
In order to solve the above technical problem, an embodiment of the present invention provides a data receiving method for an interception device, including: determining the type of a data packet to be received, wherein the type of the data packet to be received comprises at least one of the following: MU-MIMO packets, OFDMA packets; when the type of the data packet to be received is an OFDMA data packet, receiving the OFDMA data packet to be received by adopting all RUs corresponding to the OFDMA data packet; and when the type of the data packet to be received is an MU-MIMO data packet, receiving all spatial streams corresponding to the MU-MIMO data packet.
Optionally, the OFDMA data packet includes: an uplink OFDMA data packet or a downlink OFDMA data packet; the MU-MIMO packet includes: uplink MU-MIMO data packets or downlink MU-MIMO data packets.
Optionally, when the type of the data packet to be received is an uplink OFDMA data packet, before receiving the data packet to be received, the method further includes: receiving a trigger frame; and acquiring all RUs corresponding to the uplink OFDMA data packet based on the received trigger frame.
Optionally, when the type of the data packet to be received is a downlink OFDMA data packet, before receiving the data packet to be received, the method further includes: and acquiring all RUs corresponding to the downlink OFDMA data packet based on the header information of the downlink OFDMA data packet.
Optionally, when the type of the data packet to be received is an uplink MU-MIMO data packet, before receiving the data packet to be received, the method further includes: receiving a trigger frame; and acquiring all spatial stream information corresponding to the uplink MU-MIMO data packet based on the received trigger frame.
Optionally, when the type of the data packet to be received is a downlink MU-MIMO data packet, before receiving the data packet to be received, the method further includes: and acquiring all spatial stream information corresponding to the downlink MU-MIMO data packet based on the header information of the downlink MU-MIMO data packet.
Optionally, the interception apparatus includes: one or more receiving units.
Optionally, the one or more receiving units comprise: and an external receiving unit.
Optionally, the external receiving units are distributed in a preset area around the AP.
The embodiment of the invention provides interception equipment, which comprises: a determining unit adapted to determine a type of a data packet to be received, the type of the data packet to be received including at least one of: MU-MIMO packets, OFDMA packets; a first receiving unit, adapted to receive the OFDMA data packet to be received by using all RUs corresponding to the OFDMA data packet when the type of the data packet to be received is an OFDMA data packet; and the second receiving unit is suitable for receiving all spatial streams corresponding to the MU-MIMO data packet when the type of the data packet to be received is the MU-MIMO data packet.
Optionally, the OFDMA data packet includes: an uplink OFDMA data packet or a downlink OFDMA data packet; the MU-MIMO packet includes: uplink MU-MIMO data packets or downlink MU-MIMO data packets.
Optionally, when the type of the data packet to be received is an uplink OFDMA data packet, the interception apparatus further includes: a third receiving unit adapted to receive a trigger frame; a first obtaining unit, adapted to obtain all RUs corresponding to the uplink OFDMA data packet based on the received trigger frame.
Optionally, when the type of the data packet to be received is a downlink OFDMA data packet, the interception apparatus further includes: and a second obtaining unit, adapted to obtain all RUs corresponding to the downlink OFDMA data packet based on the header information of the downlink OFDMA data packet.
Optionally, when the type of the data packet to be received is an uplink MU-MIMO data packet, the interception apparatus further includes: a fourth receiving unit adapted to receive a trigger frame; and the third obtaining unit is suitable for obtaining all spatial stream information corresponding to the uplink MU-MIMO data packet based on the received trigger frame.
Optionally, when the type of the data packet to be received is a downlink MU-MIMO data packet, the interception apparatus further includes: and the fourth obtaining unit is suitable for obtaining all spatial stream information corresponding to the downlink MU-MIMO data packet based on the header information of the downlink MU-MIMO data packet.
Optionally, the interception apparatus includes: one or more receiving units.
Optionally, the one or more receiving units comprise: and an external receiving unit.
Optionally, the external receiving units are distributed in a preset area around the AP.
An embodiment of the present invention provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and has stored thereon computer instructions, where the computer instructions, when executed, perform any of the steps of the method described above.
An embodiment of the present invention provides an interception apparatus, including a memory and a processor, where the memory stores computer instructions executable on the processor, and the processor executes the computer instructions to perform any one of the steps of the method described above.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the method comprises the steps of determining the type of a data packet to be received, and then adopting all RUs corresponding to the OFDMA data packet to receive the OFDMA data packet to be received when the type of the data packet to be received is the OFDMA data packet; and when the type of the data packet to be received is the MU-MIMO data packet, receiving all spatial streams corresponding to the MU-MIMO data packet. Due to the fact that MU MIMO and OFDMA data packets can be intercepted, success rate of data packet interception can be improved.
Furthermore, the plurality of external receiving units are distributed in different areas around the AP, for example, a plurality of angles around the AP, so that when data packets sent by a plurality of STAs are received simultaneously, each STA can have a sufficiently large receiving signal-to-noise ratio to correctly receive all the data packets, thereby improving the success rate of data packet interception.
Drawings
Fig. 1 is a flowchart of a data receiving method of an interception apparatus according to an embodiment of the present invention;
FIG. 2 is a diagram of a network architecture provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of an interactive data packet between an AP and an STA according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another network architecture provided by embodiments of the present invention;
fig. 5 is a schematic diagram of another data packet exchanged between an AP and a STA according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another network architecture provided by embodiments of the present invention;
FIG. 7 is a diagram of yet another network architecture provided by an embodiment of the present invention;
FIG. 8 is a diagram illustrating a near-far effect provided by an embodiment of the present invention;
fig. 9 is a schematic diagram of an external receiving unit according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an interception apparatus according to an embodiment of the present invention.
Detailed Description
In the prior art, the Sniffer can only intercept common data packets, such as non-MU MIMO and non-OFDMA data packets, and for MU-MIMO data packets or OFDMA data packets, only the preamble part can be intercepted, and complete data packet information cannot be provided, so that the success rate of data packet interception is low, and the application scenario is limited.
The method comprises the steps of determining the type of a data packet to be received, and then adopting all RUs corresponding to the OFDMA data packet to receive the OFDMA data packet to be received when the type of the data packet to be received is the OFDMA data packet; and when the type of the data packet to be received is the MU-MIMO data packet, receiving all spatial streams corresponding to the MU-MIMO data packet. Due to the fact that MU MIMO and OFDMA data packets can be intercepted, success rate of data packet interception can be improved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1, an embodiment of the present invention provides a data receiving method of an interception device, which may include the following steps:
step S101, determining the type of the data packet to be received, wherein the type of the data packet to be received comprises at least one of the following types: MU-MIMO data packets, OFDMA data packets.
In specific implementation, because the existing interception equipment can only intercept common data packets, such as non-MU MIMO and non-OFDMA data packets, the success rate of data packet interception is low, and the application scenario is limited, the embodiment of the present invention considers how to intercept MU-MIMO data packets and OFDMA data packets.
Step S102, when the type of the data packet to be received is an OFDMA data packet, receiving the OFDMA data packet to be received by using all RUs corresponding to the OFDMA data packet.
In a specific implementation, the OFDMA data packet may include: the uplink OFDMA packet may include: downlink OFDMA packets.
In a specific implementation, when the type of the data packet to be received is an uplink OFDMA data packet, before receiving the data packet to be received, the method further includes: receiving a Trigger Frame (Trigger Frame); and acquiring all RUs corresponding to the uplink OFDMA data packet based on the received trigger frame.
In a specific implementation, the interval between the trigger Frame and the uplink OFDMA data packet is a minimum interframe Space (SIFS).
In a specific implementation, when the type of the data packet to be received is a downlink OFDMA data packet, before receiving the data packet to be received, the method further includes: based on Header (SIG-B) information in Header information of the downlink OFDMA data packet, for example, all RUs corresponding to the downlink OFDMA data packet are acquired.
Step S103, when the type of the data packet to be received is an MU-MIMO data packet, receiving all spatial streams corresponding to the MU-MIMO data packet.
In a specific implementation, the MU-MIMO data packet may include an uplink MU-MIMO data packet, and may also include a downlink MU-MIMO data packet.
In a specific implementation, when the type of the to-be-received data packet is an uplink MU-MIMO data packet, before receiving the to-be-received data packet, the method further includes: receiving a Trigger Frame (Trigger Frame); based on the received trigger frame, acquiring all Spatial Streams (Spatial Streams) information corresponding to the uplink MU-MIMO data packet based on the received trigger frame.
In a specific implementation, the trigger frame is separated from the uplink MU-MIMO data packet by SIFS.
In a specific implementation, when the type of the data packet to be received is a downlink MU-MIMO data packet, before receiving the data packet to be received, the method further includes: and acquiring all spatial stream information corresponding to the downlink MU-MIMO data packet based on Header (Header) information of the downlink MU-MIMO data packet, for example, SIG-B information in the Header information.
In particular implementations, to demodulate the MU-MIMO packet and the OFDMA packet, the interception device needs to intercept all trigger information, e.g., trigger frames, keep synchronized with the AP, handle timing and power fluctuations between different received SIGNALs, and ensure correct demodulation of SIGNAL-to-NOISE RATIO (SNR) of the MU-MIMO packet and the OFDMA packet.
In particular implementations, to ensure a correct demodulation of the SNRs for the MU-MIMO data packets and the OFDMA data packets, the overhearing device may include one or more receiving units.
In a specific implementation, the receiving unit may be an antenna unit.
In an embodiment of the present invention, the interception apparatus includes: one or more receiving units.
In a specific implementation, the one or more receiving units may include: and an external receiving unit.
In a specific implementation, the external receiving units may be distributed in a preset area around the AP, for example, uniformly distributed around the AP or distributed between the AP and a plurality of STAs, so as to improve the success rate of packet interception.
The external receiving units are distributed in different areas around the AP, for example, a plurality of angles around the AP, so that when data packets sent by a plurality of STAs are received simultaneously, each STA can have a sufficiently large receiving signal-to-noise ratio to correctly receive all the data packets, and the success rate of data packet interception is improved.
In a specific implementation, the interception device may share Hardware (Hardware) with the SAT or the AP, and when the interception device shares Hardware with the SAT or the AP, before the above scheme is executed, it needs to determine whether the interception device currently operates in a Normal Mode (Normal Mode) or an interception Mode (Sniffer Mode) according to a Configuration (Configuration) of the system: when the system is configured to be in an interception mode, receiving a data packet according to the scheme; when the system is configured in the normal mode, the data packet is received according to the prior art scheme, which is not described herein again.
It is understood that step S102 and step S103 are only used to distinguish different execution steps, and do not indicate an execution order, and there is no logical order between them. In a specific implementation, step S102 may be executed first and then step S103, step S103 may be executed first and then step S102 may be executed, or step S102 and step S103 may be executed simultaneously.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a schematic diagram of a network architecture, as shown in fig. 2.
Based on the network architecture of fig. 2, an embodiment of the present invention provides a schematic diagram of data packets exchanged between an AP and an STA, as shown in fig. 3.
Referring to fig. 2 and fig. 3, for the downlink, the AP uses an OFDMA mechanism, and after Backoff (Backoff), transmits a plurality of MU aggregate MAC Protocol Data Unit (a-MPDU) to different STAs, where the a-MPDU includes related information of uplink trigger, that is, transmits a High Efficiency (HE) MU PLCP Protocol Data Unit (PPDU) packet to different STAs, where the PLCP is a Physical Layer Convergence Procedure (PLCP); for the uplink, multiple STAs transmit a feedback (Block Ack, BA) packet to the AP using the OFDMA scheme.
For an AP: and simultaneously sending a plurality of HE MU PPDU data packets to different STAs, and then simultaneously receiving BA data packets fed back by all the STAs.
For a given STA (i.e., the STA receiving the HE MU PPDU packet): PPDU packets are received at the designated RU and BA packets are sent to the AP.
For non-designated STAs (i.e., STAs that do not receive HE MU PPDU packets): and entering an Idle state after receiving the SIG-B data packet.
For the Sniffer applying the above scheme: all contents of all HE MU PPDUs sent by the AP to the multiple STAs can be received, that is, all data packets borne by RUs can be intercepted; the BA packets sent by all STAs may then be received based on the trigger frame in the HE MU PPDU.
In specific implementation, an interactive process of the AP sending the data packet by using the MU-MIMO mechanism is similar to an interactive process of the AP sending the data packet by using the OFDMA mechanism, and the embodiment of the present invention is not described again.
In particular implementations, to demodulate the MU-MIMO and OFDMA packets, Sniffer needs to intercept all trigger information (e.g., trigger frames), keep in sync with the AP, handle timing and power fluctuations between different received signals, and ensure correct demodulation of the snr of the MU-MIMO and OFDMA packets.
In order to make the present invention better understood and implemented by those skilled in the art, the embodiment of the present invention further provides a schematic diagram of another network architecture, as shown in fig. 4.
Based on the network architecture of fig. 4, an embodiment of the present invention provides a schematic diagram of data packets exchanged between an AP and an STA, as shown in fig. 5.
Referring to fig. 4 and 5, for the uplink, using the OFDMA mechanism, a plurality of STAs simultaneously transmit an HE PPDU packet to the AP; for the downlink, the AP simultaneously sends multiple BA packets to different STAs.
For an AP: and sending a trigger frame, receiving all uplink data packets, and sending the BA data packets to the STA.
For a given STA (i.e., the STA that sent the HE PPDU packet): and receiving the trigger frame to obtain a specified RU, then sending an uplink data packet by using the specified RU, and then receiving a BA data packet fed back by the AP.
For non-designated STAs (i.e., STAs that do not send HE PPDU packets): and the Idle state is achieved after the trigger frame is received.
For the Sniffer applying the above scheme: and receiving the trigger frame to acquire all RUs, then receiving all uplink data packets based on all RUs in the trigger frame, and receiving all BA data packets fed back by the AP.
In a specific implementation, an interactive process in which a plurality of STAs transmit data packets by using an MU-MIMO mechanism is similar to an interactive process in which a plurality of STAs transmit data packets by using an OFDMA mechanism, and the embodiment of the present invention is not described again.
In particular implementations, to demodulate the MU-MIMO and OFDMA packets, Sniffer needs to intercept all trigger information (e.g., trigger frames), keep in sync with the AP, handle timing and power fluctuations between different received signals, and ensure correct demodulation of the snr of the MU-MIMO and OFDMA packets.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a schematic diagram of another network architecture, as shown in fig. 6.
Referring to fig. 6, the AP forms a subnet with STA1, STA2, STA3, and STA 4.
STA1 sends packets to the AP using Beamforming (Beamforming) techniques. For Sniffer, packets sent by STA1 to the AP may not be intercepted because its received snr is lower than that of the AP device.
To solve the above problem, when only the data packet of STA1 needs to be intercepted, the Sniffer may be placed between the AP and STA 1.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a schematic diagram of another network architecture, as shown in fig. 7.
Referring to fig. 7, the AP forms a subnet with STA1, STA2, STA3, and STA 4.
The AP transmits the data packets to STA1 and STA3 using Beamforming (Beamforming) techniques, SU Beamforming or MU MIMO techniques. For Sniffer, when it is placed at the null of the beam, it will not be able to intercept packets sent by the AP to STA1 and STA 3.
To solve the above problem, the Sniffer may be placed close to the AP.
In order to make the present invention more understandable and practical for those skilled in the art, the embodiment of the present invention further provides a schematic diagram of the near-far effect, as shown in fig. 8.
Referring to fig. 8, the AP forms a subnet with STA1, STA2, STA3, and STA 4.
The Sniffer is placed between the AP and the STA 4. For the Sniffer, since the distance of the STA2 is long, the received signal is weak, which may cause the Sniffer to fail to correctly demodulate the data packet of the STA 2.
In order to make those skilled in the art better understand and implement the present invention, the embodiment of the present invention further provides a schematic diagram of an external receiving unit, as shown in fig. 9.
Referring to fig. 9, the AP forms a sub-network with STA1, STA2, STA3, and STA4, and the Sniffer includes three external receiving units (or external antennas) disposed around the AP, which are: ant1, Ant2, and Ant 3.
In specific implementation, the external receiving unit may also be placed at other positions, and by placing the external receiving unit (or the external antenna) at different positions, the problem caused by the beam forming technology or the near-far effect may be overcome, so that the Sniffer may correctly receive all data packets sent by the AP and the STA.
In order to make the present invention more understandable and practical for those skilled in the art, an interception apparatus is further provided in an embodiment of the present invention, as shown in fig. 10.
Referring to fig. 10, the interception apparatus 100 may include: a determining unit 110, a first receiving unit 120, and a second receiving unit 130, wherein:
the determining unit 110 is adapted to determine a type of a data packet to be received, where the type of the data packet to be received includes at least one of the following: MU-MIMO data packets, OFDMA data packets.
The first receiving unit 120 is adapted to receive the OFDMA data packet to be received by using all RUs corresponding to the OFDMA data packet when the type of the data packet to be received is an OFDMA data packet.
The second receiving unit 130 is adapted to receive all spatial streams corresponding to the MU-MIMO data packet when the type of the data packet to be received is a MU-MIMO data packet.
In a specific implementation, the OFDMA data packet includes: an uplink OFDMA data packet or a downlink OFDMA data packet; the MU-MIMO packet includes: uplink MU-MIMO data packets or downlink MU-MIMO data packets.
In an implementation of the present invention, when the type of the data packet to be received is an uplink OFDMA data packet, the interception apparatus 100 further includes: a third receiving unit (not shown) and a first acquiring unit (not shown), wherein:
the third receiving unit is suitable for receiving a trigger frame.
The first obtaining unit is adapted to obtain all RUs corresponding to the uplink OFDMA data packet based on the received trigger frame.
In an implementation of the present invention, when the type of the data packet to be received is a downlink OFDMA data packet, the method further includes: a second obtaining unit (not shown) adapted to obtain all RUs corresponding to the downlink OFDMA data packet based on the header information of the downlink OFDMA data packet.
In an implementation of the present invention, when the type of the data packet to be received is an uplink MU-MIMO data packet, the interception apparatus 100 further includes: a fourth receiving unit (not shown) and a third acquiring unit (not shown), wherein:
the fourth receiving unit is adapted to receive a trigger frame.
The third obtaining unit is adapted to obtain all spatial stream information corresponding to the uplink MU-MIMO data packet based on the received trigger frame.
In an implementation of the present invention, when the type of the data packet to be received is a downlink MU-MIMO data packet, the interception apparatus further includes: and the fourth obtaining unit is suitable for obtaining all spatial stream information corresponding to the downlink MU-MIMO data packet based on the header information of the downlink MU-MIMO data packet.
In a specific implementation, the interception apparatus 100 includes: one or more receiving units (not shown).
In an embodiment of the present invention, the one or more receiving units include: an external receiving unit (not shown).
In a specific implementation, the external receiving units may be distributed within a preset area around the AP.
In a specific implementation, the work flow and the principle of the interception device 100 may refer to the description in the data receiving method of the interception device provided in the foregoing embodiment, and are not described herein again.
An embodiment of the present invention provides a computer-readable storage medium, which is a non-volatile storage medium or a non-transitory storage medium, and on which a computer instruction is stored, where the computer instruction executes, when running, any of the steps corresponding to the foregoing methods, and details are not described here again.
The embodiment of the present invention provides an interception device, including a memory and a processor, where the memory stores a computer instruction capable of running on the processor, and the processor executes, when running the computer instruction, the step corresponding to any one of the above methods, which is not described herein again.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. A data receiving method of an interception apparatus, comprising:
determining the type of a data packet to be received, wherein the type of the data packet to be received comprises at least one of the following: MU-MIMO packets, OFDMA packets;
when the type of the data packet to be received is an OFDMA data packet, receiving the OFDMA data packet to be received by adopting all RUs corresponding to the OFDMA data packet;
and when the type of the data packet to be received is an MU-MIMO data packet, receiving all spatial streams corresponding to the MU-MIMO data packet.
2. The data receiving method of the interception device of claim 1 wherein said OFDMA packet comprises: an uplink OFDMA data packet or a downlink OFDMA data packet;
the MU-MIMO packet includes: uplink MU-MIMO data packets or downlink MU-MIMO data packets.
3. The data receiving method of the interception device according to claim 2, wherein when the type of the data packet to be received is an uplink OFDMA data packet, before receiving the data packet to be received, the method further comprises:
receiving a trigger frame;
and acquiring all RUs corresponding to the uplink OFDMA data packet based on the received trigger frame.
4. The data receiving method of the interception device according to claim 2, wherein when the type of the data packet to be received is a downlink OFDMA data packet, before receiving the data packet to be received, the method further comprises:
and acquiring all RUs corresponding to the downlink OFDMA data packet based on the header information of the downlink OFDMA data packet.
5. The data receiving method of the interception device according to claim 2, wherein when the type of the data packet to be received is an uplink MU-MIMO data packet, before receiving the data packet to be received, the method further comprises:
receiving a trigger frame;
and acquiring all spatial stream information corresponding to the uplink MU-MIMO data packet based on the received trigger frame.
6. The data receiving method of the interception device according to claim 2, wherein when the type of the data packet to be received is a downlink MU-MIMO data packet, before receiving the data packet to be received, the method further comprises:
and acquiring all spatial stream information corresponding to the downlink MU-MIMO data packet based on the header information of the downlink MU-MIMO data packet.
7. The data receiving method of the interception device according to claim 2, characterized in that said interception device comprises: one or more receiving units.
8. The data receiving method of an interception device according to claim 7, wherein said one or more receiving units comprise: and an external receiving unit.
9. The data receiving method of the interception device according to claim 8, wherein said external receiving units are distributed in a predetermined area around the AP.
10. An interception device, comprising:
a determining unit adapted to determine a type of a data packet to be received, the type of the data packet to be received including at least one of: MU-MIMO packets, OFDMA packets;
a first receiving unit, adapted to receive the OFDMA data packet to be received by using all RUs corresponding to the OFDMA data packet when the type of the data packet to be received is an OFDMA data packet;
and the second receiving unit is suitable for receiving all spatial streams corresponding to the MU-MIMO data packet when the type of the data packet to be received is the MU-MIMO data packet.
11. The interception device of claim 10 wherein said OFDMA packet comprises: an uplink OFDMA data packet or a downlink OFDMA data packet;
the MU-MIMO packet includes: uplink MU-MIMO data packets or downlink MU-MIMO data packets.
12. The interception device according to claim 11, wherein when said type of the packet to be received is an uplink OFDMA packet, further comprising:
a third receiving unit adapted to receive a trigger frame;
a first obtaining unit, adapted to obtain all RUs corresponding to the uplink OFDMA data packet based on the received trigger frame.
13. The interception apparatus of claim 11 wherein when said type of said data packet to be received is a downlink OFDMA data packet, further comprising:
and a second obtaining unit, adapted to obtain all RUs corresponding to the downlink OFDMA data packet based on the header information of the downlink OFDMA data packet.
14. The interception device according to claim 11, wherein when said type of the data packet to be received is an uplink MU-MIMO data packet, further comprising:
a fourth receiving unit adapted to receive a trigger frame;
and the third obtaining unit is suitable for obtaining all spatial stream information corresponding to the uplink MU-MIMO data packet based on the received trigger frame.
15. The interception device according to claim 11, wherein when said type of the data packet to be received is a downlink MU-MIMO data packet, further comprising:
and the fourth obtaining unit is suitable for obtaining all spatial stream information corresponding to the downlink MU-MIMO data packet based on the header information of the downlink MU-MIMO data packet.
16. The interception device according to claim 11, characterized in that said interception device comprises: one or more receiving units.
17. The interception device of claim 16 wherein said one or more receiving units comprise: and an external receiving unit.
18. The interception device according to claim 17, wherein said external receiving units are distributed in a predetermined area around the AP.
19. A computer-readable storage medium, being a non-volatile storage medium or a non-transitory storage medium, having computer instructions stored thereon, wherein the computer instructions, when executed, perform the steps of the method according to any one of claims 1 to 9.
20. An interception device comprising a memory and a processor, said memory having stored thereon computer instructions executable on said processor, wherein said processor, when executing said computer instructions, performs the steps of the method according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986669.0A CN109413026B (en) | 2018-08-28 | 2018-08-28 | Interception device, data receiving method thereof and readable storage medium |
Applications Claiming Priority (1)
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| US9686002B1 (en) * | 2015-03-05 | 2017-06-20 | Quantenna Communications, Inc. | MU-MIMO sniffer for a wireless local area network |
| CN107078870A (en) * | 2014-05-02 | 2017-08-18 | 马维尔国际贸易有限公司 | Multi-user's assignment signalling in cordless communication network |
| CN107465640A (en) * | 2016-06-03 | 2017-12-12 | 中兴通讯股份有限公司 | The transmission of data cell, processing method and processing device, website |
| WO2017213794A1 (en) * | 2016-06-06 | 2017-12-14 | Symbol Technologies, Llc | Client device and method for analysis of a predetermined set of parameters associated with radio coupling to a wlan |
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| CN107078870A (en) * | 2014-05-02 | 2017-08-18 | 马维尔国际贸易有限公司 | Multi-user's assignment signalling in cordless communication network |
| US9686002B1 (en) * | 2015-03-05 | 2017-06-20 | Quantenna Communications, Inc. | MU-MIMO sniffer for a wireless local area network |
| CN107465640A (en) * | 2016-06-03 | 2017-12-12 | 中兴通讯股份有限公司 | The transmission of data cell, processing method and processing device, website |
| WO2017213794A1 (en) * | 2016-06-06 | 2017-12-14 | Symbol Technologies, Llc | Client device and method for analysis of a predetermined set of parameters associated with radio coupling to a wlan |
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