CN103001816B - Data communications method and equipment - Google Patents

Abstract

Embodiments of the present invention provide a data communication method and device, which can improve the efficiency of judging empty data packets. The method includes: receiving a data packet; determining whether the data packet is an empty data packet according to the modulation mode of the frame segment of the data packet or according to the indication information carried by the reserved bit or the reserved status bit of the data packet. The embodiment of the present invention indicates whether the data packet is an empty data packet through the modulation mode of the frame segment of the data packet or the reserved bit or reserved status bit of the data packet, without comparing the bit pattern, thereby reducing the complexity of empty data packet detection Spend.

Description

Data communication method and device

technical field

The embodiments of the present invention relate to the field of wireless communication, and more specifically, to a data communication method and device.

Background technique

Due to the complexity and variability of the wireless channel environment, the transmitter needs to obtain the necessary channel information through the channel measurement mechanism to optimize the transmission process. For example, a modulation and coding scheme (MCS, Modulation and Coding Scheme) is selected by measuring a channel quality indicator (CQI, Channel Quality Indicator).

Channel measurement refers to the process of detecting unknown channel state information through known training signals. Common channel state information includes channel quality indicator (CQI), channel state information (CSI, Channel State Information) and so on.

Channel measurements are usually done with known training signals (pilots). The transmitting end transmits a pre-negotiated training signal at the receiving end to the receiving end, detects known signals at the receiving end, and obtains wireless channel information through the detection process. Then, the receiving end quantifies the obtained channel information and feeds it back to the transmitting end in the form of a return packet, which completes a channel measurement.

A null data packet (NDP, Null data packet) is a data packet that does not contain data but only contains pilots and some necessary control signaling, and its main function is to perform channel measurement.

Since NDP omits the usually long data part, the length of the packet can be effectively compressed for the design method of time division. For example, in a time division duplex (TDD, Time Division Duplexing) system, transmitting NDP can enable the transmitting end and the receiving end to implement fast channel measurement and shorten the interaction time.

Currently, a fixed bit pattern (bit pattern) is used to indicate the NDP. Taking 802.11ac as an example, a fixed bit pattern is used in the very high throughput signaling VHT-SIG-B part to indicate that the data packet is NDP. The VHT-SIG-B part is mainly used to indicate the length of the subframe data and the modulation and coding method adopted.

The receiving end will detect the VHT-SIG-B bits extracted from the data packet. If it can completely correspond to the above fixed bit pattern, the receiving end will treat the data packet as NDP and will not try to demodulate the subsequent data; Otherwise, it is considered that the data packet is not NDP, and the following data is demodulated according to the control information carried in the VHT-SIG-B (such as length and modulation and demodulation mode MCS).

However, the detection process is cumbersome, requiring the receiver to perform operations such as demodulation, decoding, and bit pattern comparison on the VHT-SIG-B.

Contents of the invention

Embodiments of the present invention provide a data communication method and device, which can improve the efficiency of judging empty data packets.

On the one hand, a data communication method is provided, including: receiving a data packet; determining whether the data packet is empty data according to the modulation mode of the frame segment of the data packet or according to the indication information carried by the reserved bit or the reserved status bit of the data packet Bag.

In another aspect, a data communication method is provided, including: generating a data packet, the modulation mode of the frame segment of the data packet or the indication information carried by the reserved bit or the reserved status bit of the data packet indicating whether the data packet is an empty data packet; Receiver sends packets.

In another aspect, a data communication device is provided, including: a receiving unit, configured to receive a data packet; a determining unit, configured to use the modulation mode of the frame segment of the data packet or according to the reserved bit or reserved status bit of the data packet. Instructions to determine if the packet is an empty packet.

In another aspect, a data communication device is provided, including: a generating unit, configured to generate a data packet, wherein the modulation mode of the frame segment of the data packet or the indication information carried by the reserved bit or the reserved status bit of the data packet indicates whether the data packet is is an empty data packet; a sending unit, configured to send the data packet to the receiving end.

The embodiment of the present invention indicates whether the data packet is an empty data packet through the modulation mode of the frame segment of the data packet or the reserved bit or reserved status bit of the data packet, without comparing the bit pattern, thereby reducing the complexity of empty data packet detection Spend.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic diagram of a physical layer frame structure of a data packet.

Fig. 2 is a flowchart of a data communication method according to an embodiment of the present invention.

Fig. 3 is a flowchart of a data communication method according to another embodiment of the present invention.

Fig. 4 is a block diagram of a data communication device according to one embodiment of the present invention.

Fig. 5 is a block diagram of a data communication device of another embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The embodiment of the present invention is described by taking the 802.11 protocol of WLAN (Wireless Local Access Network, wireless local area network) as an example, but the embodiment of the present invention is not limited to the specific protocol form, but can also be similarly applied to other wireless transmission data packets. Firstly, the physical layer frame structure of the data packet conforming to the 802.11 protocol is described with reference to the schematic diagram in FIG. 1 . The physical layer frame structure specifies the functional division and time/frequency occupancy relationship of a data packet (or frame).

As shown in Figure 1, the frame segments L-STF, L-LTF, VHT-STF, VHT-LTF1, ..., VHT-LTFN are training sequences for synchronization and channel estimation. In the 802.11ac-compliant frame segment, the first symbol 11 of L-SIG and very high-throughput signaling VHT-SIG-A (corresponding to 20-24 μs of the packet, also known as VHT-SIG-A1) and very High-throughput signaling VHT-SIG-B adopts BPSK (Binary Phase Shift Keying, binary phase shift keying) modulation mode, and the second symbol 12 of VHT-SIG-A (corresponding to 24-28μs of the data packet is also called VHT -SIG-A2) adopts QBPSK (Quadrature BPSK, quadrature binary phase shift keying) modulation method. QBPSK is a modulation method of BPSK plus 90-degree phase rotation.

In the 802.11 protocol, the two symbols 11 and 12 of VHT-SIG-A adopt different modulation modes, which are mainly used to distinguish subframe structures of different protocol versions. In order to ensure backward compatibility, BPSK and phase rotation are used in 802.11 to modulate the SIG part. The frame structure of all subframes is exactly the same from 0 to 20 μs. Starting from the 20th μs, different modulation methods are used to distinguish different frame structures, such as:

If the first symbol 11 and the second symbol 12 both adopt BPSK, QPSK (Quadrature PhaseShift Keying, Quadrature Phase Shift Keying) or QAM (Quadrature Amplitude Modulation, Quadrature Amplitude Modulation) modulation, then the frame is 802.11a/g frame.

If the first symbol 11 and the second symbol 12 adopt the QBPSK modulation mode, it can be judged that the frame is an 802.11n frame.

If the first symbol 11 adopts BPSK modulation and the second symbol 12 adopts QBPSK modulation, then the frame is an 802.11ac frame.

Currently a fixed bit pattern is used to indicate NDP. Taking 802.11ac as an example, a fixed bit pattern is used in the VHT-SIG-B part to indicate that the data packet is NDP. The VHT-SIG-B part is mainly used to indicate the length of the subframe data and the modulation and coding method adopted.

The receiving end will detect the VHT-SIG-B bits extracted from the data packet. If it can completely correspond to the above fixed bit pattern, the receiving end will treat the data packet as NDP and will not try to demodulate the subsequent data; Otherwise, it is considered that the data packet is not NDP, and the following data is demodulated according to the control information carried in the VHT-SIG-B (such as length and modulation and demodulation mode MCS).

However, the detection process is cumbersome, requiring the receiver to perform operations such as demodulation, decoding, and bit pattern comparison on the VHT-SIG-B.

Fig. 2 is a flowchart of a data communication method according to an embodiment of the present invention. The method in Fig. 2 is executed by the transmitting end of the data packet.

201. Generate a data packet, where the modulation mode of the frame segment of the data packet or the indication information carried by the reserved bit or the reserved status bit of the data packet indicates whether the data packet is an empty data packet.

Optionally, as an embodiment, when the modulation mode of the frame segment is used to indicate the data packet type, taking the frame structure of the 802.11 data packet shown in FIG. 1 as an example, the two symbols of the VHT-SIG-A part ( The first symbol 11 and the second symbol 12) shown in FIG. 1 adopt different BPSK modulation modes. For example, if the modulation mode of the first symbol 11 of the VHT-SIG-A frame segment of the data packet is BPSK, the modulation mode of the second symbol 12 of the VHT-SIG-A frame segment is QBPSK to indicate that the data packet is NDP. In other cases, for example, if the modulation scheme of the first symbol 11 is QBPSK and the modulation scheme of the second symbol 12 is BPSK, it may indicate that the data packet is a non-null data packet (a non-null data packet of the 802.11ac protocol). At this time, for NDP, the transmitter does not need to deal with the VHT-SIG-B part in particular.

Optionally, as another embodiment, when the modulation mode of the frame segment is used to indicate the data packet type, the VHT-SIG-B modulation mode may be used to indicate the data packet type. For example, if the modulation mode of VHT-SIG-B is QBPSK, it indicates that the data packet is NDP. In other cases, for example, if the modulation mode of the VHT-SIG-B is BPSK, it indicates that the data packet is non-NDP.

Optionally, as another embodiment, a reserved bit in the data packet may be used to explicitly indicate the type of the data packet. Taking the 801.11ac protocol as an example, bit B4 of L-SIG, bit B2 and bit B23 of VHT-SIG-A1 in VHT-SIG-A signaling, and bit B9 of VHT-SIG-A2 are reserved bits. , one or more of these reserved bits can be used to explicitly indicate the packet type.

Taking the B4 bit of the L-SIG as an example, if the B4 bit is set to 0, it may indicate that the data packet is NDP, or if the B4 bit is set to 1, it may indicate that the data packet is non-NDP. The reverse is also possible, that is, if the B4 bit is set to 1, it may indicate that the data packet is NDP, or if the B4 bit is set to 0, it may indicate that the data packet is non-NDP. Examples of other reserved bits are similar, so details are not repeated here.

Optionally, as another embodiment, the reserved status bit in the data packet may be used to explicitly indicate the type of the data packet. The so-called reserved status bits refer to status indication bits that are not used.

Taking the 801.11ac protocol as an example, in the L-SIG, the Rate (rate) field has 4 bits in total, which can represent 2 ⁴ =16 states, but currently only 8 states (1101, 1111, 0101, 0111, 1001, 1011, 0001, 0011) represent 8 kinds of data transmission rates. The unused 8 status bits can be used to explicitly indicate whether the packet is NDP or not. For example, a Rate field of "0000" may indicate that this data packet is NDP.

As another example, the Group ID (group identifier) in VHT-SIG-A has 6 bits in total, and Group ID=1 is currently reserved, so the NDP indication can be performed by setting the Group ID to 1.

As yet another example, the Length (length) reserved state in the VHT-SIG-B may be used to indicate the NDP. Length in VHT-SIG-B is all 0 is a reserved state, which can be used to indicate that this data packet is NDP.

202. Send the data packet to the receiving end.

The transmitting end sends the above-mentioned data packet generated in step 201 to the receiving end, so that the receiving end determines whether the data packet is NDP according to the modulation mode of the frame segment of the data packet or according to the indication information carried in the reserved bits of the data packet, and perform corresponding processing.

The embodiment of the present invention indicates whether the data packet is an empty data packet through the modulation mode of the frame segment of the data packet or the reserved bit or reserved status bit of the data packet, without comparing the bit pattern, thereby reducing the complexity of empty data packet detection Spend.

In the case of using the different modulation modes of the two symbols of the VHT-SIG-A frame segment to indicate the data packet type, neither the transmitting end nor the receiving end needs to process the VHT-SIG-B part, and the receiving end only needs to judge the VHT-SIG-A The modulation method of the two symbols is sufficient, and processes such as demodulation and decoding are omitted, which can reduce processing complexity.

On the other hand, in the case of using the modulation method of the VHT-SIG-B frame segment to indicate the packet type, the receiving end only needs to judge the modulation method of VHT-SIG-B during processing, without demodulation, decoding, etc. process, which can reduce the processing complexity.

The above scheme of indicating the data packet type through the modulation mode of the frame segment can also be used in conjunction with the current bit pattern detection scheme, which can further reduce the probability of NDP misjudgment.

In addition, in the case of using reserved bits or reserved status bits to explicitly indicate the data packet type, the receiving end only needs to parse the corresponding reserved bits or reserved status bits, which can also reduce processing complexity.

Fig. 3 is a flowchart of a data communication method according to another embodiment of the present invention. The method in FIG. 3 is executed by the receiving end, and corresponds to the method in FIG. 2 , so detailed description will be appropriately omitted.

301. Receive a data packet.

For example, the data packet received in step 301 may be a data packet generated and sent according to the method in FIG. 1 . Optionally, as an embodiment, the above data packet complies with the 802.11ac protocol, wherein the modulation mode of the frame segment of the data packet or the indication information carried in the reserved bits of the data packet indicates whether the data packet is an empty data packet.

302. Determine whether the data packet is an empty data packet according to the modulation mode of the frame segment of the data packet or according to the indication information carried by the reserved bit or the reserved status bit of the data packet.

Optionally, as an embodiment, in the case where the modulation mode of the frame segment of the data packet indicates the type of the data packet, the receiving end may, according to the first symbol 11 and the Two-symbol 12 modulation mode, to determine whether the data packet is NDP. Wherein, referring to FIG. 1 , the first symbol 11 corresponds to 20-24 μs in the data packet, and the second symbol 12 corresponds to 24-28 μs in the data packet.

For example, if the modulation scheme of the first symbol 11 is BPSK and the modulation scheme of the second symbol 12 is QBPSK, it can be determined that the data packet is NDP. In other cases, for example, if the modulation scheme of the first symbol 11 is QBPSK and the modulation scheme of the second symbol 12 is BPSK, it may indicate that the data packet is non-NDP (non-NDP of the 802.11ac protocol). At this time, for NDP, the receiving end does not need to process the VHT-SIG-B part.

Optionally, as an embodiment, when the modulation mode of the frame segment of the data packet indicates the type of the data packet, the receiving end may determine whether the data packet is NDP through the VHT-SIG-B modulation mode. For example, if the modulation mode of VHT-SIG-B is QBPSK, it can be determined that the data packet is NDP. In other cases, for example, if the modulation mode of the VHT-SIG-B is BPSK, it may be determined that the data packet is non-NDP.

The receiving end can judge the modulation mode according to the energy of the real part and the imaginary part of the signal in the digital domain, and then judge whether the data packet is NDP. For example, if the energy of the real part of the signal in the digital domain is much greater than the energy of the imaginary part, the modulation method is determined to be BPSK; if the energy of the real part of the signal in the digital domain is much smaller than the energy of the imaginary part, then the modulation method is determined to be QBPSK; If the energy of the imaginary part is basically equal, then the modulation mode is determined to be QPSK or QAM.

Optionally, as an embodiment, in the case where reserved bits in the data packet are used to explicitly indicate whether the data packet is NDP, the receiving end may parse the corresponding reserved bits to determine the type of the data packet. For example, as mentioned above, taking the 801.11ac protocol as an example, currently the B4 bit of L-SIG, the B2 bit and B23 bit of VHT-SIG-A1 in the VHT-SIG-A signaling, and the B9 bit of VHT-SIG-A2, etc. For reserved bits, one or more of these reserved bits may be used to explicitly indicate the packet type.

Taking the B4 bit of the L-SIG as an example, if the B4 bit is set to 0, it can be determined that the data packet is NDP, or if the B4 bit is set to 1, it can be determined that the data packet is non-NDP. The reverse is also possible, that is, if the B4 bit is set to 1, it may indicate that the data packet is NDP, or if the B4 bit is set to 0, it may indicate that the data packet is non-NDP. Examples of other reserved bits are similar, so details are not repeated here.

Optionally, as another embodiment, in the case where the reserved status bit in the data packet is used to explicitly indicate the type of the data packet, the receiving end may parse the corresponding reserved status bit to determine the type of the data packet. The so-called reserved status bits refer to status indication bits that are not used.

As mentioned above, taking the 801.11ac protocol as an example, in the L-SIG, the Rate (rate) field has a total of 4 bits, which can represent 2 ⁴ =16 states, but currently only 8 of them are used (1101, 1111, 0101, 0111, 1001, 1011, 0001, 0011) represent 8 kinds of data transmission rates. The unused 8 status bits can be used to explicitly indicate whether the packet is NDP or not. For example, a Rate field of "0000" may indicate that this data packet is NDP.

As another example, the Group ID (group identifier) in VHT-SIG-A has 6 bits in total, and Group ID=1 is currently reserved, so the NDP indication can be performed by setting the Group ID to 1.

As yet another example, the Length (length) reserved state in the VHT-SIG-B may be used to indicate the NDP. Length in VHT-SIG-B is all 0 is a reserved state, which can be used to indicate that this data packet is NDP.

The embodiment of the present invention indicates whether the data packet is an empty data packet through the modulation mode of the frame segment of the data packet or the indication information carried in the reserved bits of the data packet, without comparing bit patterns, thereby reducing the complexity of empty data packet detection.

In the case of using the different modulation modes of the two symbols of the VHT-SIG-A frame segment to indicate the data packet type, neither the transmitting end nor the receiving end needs to process the VHT-SIG-B part, and the receiving end only needs to judge the VHT-SIG-A The modulation method of the two symbols is sufficient, and processes such as demodulation and decoding are omitted, which can reduce processing complexity.

On the other hand, in the case of using the modulation method of the VHT-SIG-B frame segment to indicate the packet type, the receiving end only needs to judge the modulation method of VHT-SIG-B during processing, without demodulation, decoding, etc. process, which can reduce the processing complexity.

The above scheme of indicating the data packet type through the modulation mode of the frame segment can also be used in conjunction with the current bit pattern detection scheme, which can further reduce the probability of NDP misjudgment.

In addition, in the case of using reserved bits or reserved status bits to explicitly indicate the data packet type, the receiving end only needs to parse the corresponding reserved bits or reserved status bits, which can also reduce processing complexity.

Fig. 4 is a block diagram of a data communication device according to one embodiment of the present invention. An example of the data communication device 40 in FIG. 4 is a transmitting end, including a generating unit 41 and a sending unit 42 .

The generating unit 41 generates a data packet, and the modulation mode of the frame segment of the data packet or the indication information carried by the reserved bit or the reserved status bit of the data packet indicates whether the data packet is an empty data packet. The sending unit 41 sends the data packet generated by the generating unit 41 to the receiving end.

The embodiment of the present invention indicates whether the data packet is an empty data packet through the modulation mode of the frame segment of the data packet or the reserved bit or reserved status bit of the data packet, without comparing the bit pattern, thereby reducing the complexity of empty data packet detection Spend.

Each part of the data communication device 40 can execute each process of the method shown in FIG. 2 , and to avoid repetition, no detailed description is given here.

For example, as an embodiment, the data packet generated by the generating unit 41 may conform to the 802.11ac protocol. The modulation mode of the first symbol of the VHT-SIG-A frame segment of the data packet is BPSK, and the modulation mode of the second symbol of the VHT-SIG-A frame segment is QBPSK, to indicate that the data packet is NDP. Referring to Fig. 1, the first symbol 11 may correspond to 20-24 μs in the data packet (VHT-SIG-A1), and the second symbol 12 may correspond to 24-28 μs in the data packet (VHT-SIG-A2). At this time, neither the transmitting end nor the receiving end needs to process the VHT-SIG-B part. The receiving end only needs to judge the modulation mode of the two symbols of VHT-SIG-A, omitting demodulation, decoding and other processes, which can reduce the processing complexity Spend.

Optionally, as another embodiment, the data packet generated by the generating unit 41 may conform to the 802.11ac protocol. The modulation mode of the VHT-SIG-B frame segment of the data packet is QBPSK to indicate that the data packet is an empty data packet. At this time, the receiving end only needs to judge the modulation mode of VHT-SIG-B during processing, without demodulation, decoding and other processes, which can reduce processing complexity.

The above scheme of indicating the data packet type through the modulation mode of the frame segment can also be used in conjunction with the current bit pattern detection scheme, which can further reduce the probability of NDP misjudgment.

Optionally, as another embodiment, the data packet generated by the generating unit 41 may use reserved bits in the data packet to explicitly indicate the type of the data packet. Taking the 801.11ac protocol as an example, bit B4 of L-SIG, bit B2 and bit B23 of VHT-SIG-A1 in VHT-SIG-A signaling, and bit B9 of VHT-SIG-A2 are reserved bits. One or more of these reserved bits are used to explicitly indicate the packet type. Alternatively, the type of packet can be explicitly indicated using a reserved status bit in the packet. At this time, the receiving end only needs to parse the corresponding reserved bits or reserved status bits, which can also reduce processing complexity.

Fig. 5 is a block diagram of a data communication device according to one embodiment of the present invention. An example of the data communication device 50 in FIG. 5 is a receiving end, including a receiving unit 51 and a determining unit 52 .

The receiving unit 51 receives data packets. The determining unit 52 determines whether the data packet is NDP according to the modulation mode of the frame segment of the data packet received by the receiving unit 51 or according to the indication information carried by the reserved bit or the reserved status bit of the data packet.

Each part of the data communication device 50 can execute each process of the method shown in FIG. 3 , and to avoid repetition, no detailed description is given here.

For example, as an embodiment, the data packets received by the receiving unit 51 may comply with the 802.11ac protocol. The determining unit 52 may determine whether the data packet is an empty data packet according to the modulation mode of the first symbol and the second symbol of the VHT-SIG-A frame segment of the data packet. Referring to FIG. 1 , the first symbol 11 may correspond to 20-24 μs in the data packet, and the second symbol 12 may correspond to 24-28 μs in the data packet.

For example, if the modulation scheme of the first symbol 11 is BPSK and the modulation scheme of the second symbol 12 is QBPSK, the determining unit 52 may determine that the data packet is an empty data packet. At this time, neither the transmitting end nor the receiving end needs to process the VHT-SIG-B part. The receiving end only needs to judge the modulation mode of the two symbols of VHT-SIG-A, omitting demodulation, decoding and other processes, which can reduce the processing complexity Spend.

Optionally, as another embodiment, the data packets received by the receiving unit 51 may conform to the 802.11ac protocol. The determining unit 52 may determine whether the data packet is an empty data packet according to the modulation mode of the VHT-SIG-B frame segment of the data packet. For example, if the modulation mode of VHT-SIG-B is QBPSK, the determining unit 52 may determine that the data packet is an empty data packet. At this time, the receiving end only needs to judge the modulation mode of VHT-SIG-B during processing, without demodulation, decoding and other processes, which can reduce processing complexity.

The above scheme of indicating the data packet type through the modulation mode of the frame segment can also be used in conjunction with the current bit pattern detection scheme, which can further reduce the probability of NDP misjudgment.

Optionally, as another embodiment, the data packet received by the receiving unit 51 may use reserved bits in the data packet to explicitly indicate the type of the data packet. Taking the 801.11ac protocol as an example, bit B4 of L-SIG, bit B2 and bit B23 of VHT-SIG-A1 in VHT-SIG-A signaling, and bit B9 of VHT-SIG-A2 are reserved bits. One or more of these reserved bits are used to explicitly indicate the packet type. Alternatively, the type of packet can be explicitly indicated using a reserved status bit in the packet. At this time, the determining unit 52 only needs to analyze the corresponding reserved bits or reserved status bits to determine whether the data packet is NDP, which can also reduce processing complexity.

A communication system according to an embodiment of the present invention may include the data communication device 40 or 50 described above.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (16)

1. A data communication method, characterized in that, comprising: Receiving a data packet, the modulation mode adopted by the frame segment when the data packet is an empty data packet and when the data packet is a non-empty data packet is different; Determine whether the data packet is an empty data packet according to the modulation mode of the frame segment of the data packet. 2. The method according to claim 1, wherein, determining whether the data packet is an empty data packet according to the modulation mode of the frame segment of the data packet comprises: Whether the data packet is an empty data packet is determined according to the modulation mode of the first symbol and the second symbol of the very high throughput signaling VHT-SIG-A frame segment of the data packet. 3. The method according to claim 2, wherein the modulation method of the first symbol and the second symbol of the VHT-SIG-A frame segment of the very high throughput signaling VHT-SIG-A frame segment according to the data packet is determined to determine the Whether the above data packet is an empty data packet, including: If the modulation mode of the first symbol is binary phase shift keying (BPSK), and the modulation mode of the second symbol is quadrature binary phase shift keying (QBPSK), then it is determined that the data packet is an empty data packet. 4. The method according to claim 1, wherein, determining whether the data packet is an empty data packet according to the modulation mode of the frame segment of the data packet comprises: It is determined whether the data packet is an empty data packet based on the modulation mode of the very high throughput signaling VHT-SIG-B frame segment of the data packet. 5. The method according to claim 4, characterized in that, determining whether the data packet is an empty data packet according to the modulation mode of the very high throughput signaling VHT-SIG-B frame segment of the data packet ,include: If the modulation mode of the VHT-SIG-B is QBPSK, it is determined that the data packet is an empty data packet. 6. A data communication method, characterized in that, comprising: Generate a data packet, the modulation mode of the frame segment of the data packet indicates whether the data packet is an empty data packet, the modulation adopted by the frame segment when the data packet is an empty data packet and the data packet is a non-empty data packet in different ways; Send the data packet to the receiving end. 7. The method according to claim 6, wherein said generating a data packet comprises: generating data packets whose very high-throughput signaling VHT-SIG-A frame segment's first symbol is modulated by binary phase shift keying BPSK and whose VHT-SIG-A frame segment's second symbol The modulation method is quadrature binary phase shift keying QBPSK to indicate that the data packet is an empty data packet. 8. The method according to claim 6, wherein said generating a data packet comprises: A data packet is generated, the very high throughput signaling VHT-SIG-B frame segment of the data packet is modulated by QBPSK to indicate that the data packet is an empty data packet. 9. A data communication device, characterized in that it comprises: The receiving unit is used to receive a data packet, and the modulation method adopted by the frame segment when the data packet is an empty data packet and the data packet is a non-empty data packet is different; The determining unit is configured to determine whether the data packet is an empty data packet according to the modulation mode of the frame segment of the data packet received by the receiving unit. 10. The device according to claim 9, characterized in that the determining unit is specifically configured to determine the first symbol and the second symbol of a VHT-SIG-A frame segment according to the very high throughput signaling of the data packet Modulation mode, determine whether the data packet is an empty data packet. 11. The device according to claim 10, wherein the determining unit is specifically configured to if the modulation mode of the first symbol is binary phase shift keying (BPSK), and the modulation mode of the second symbol is quadrature Binary Phase Shift Keying QBPSK, then it is determined that the data packet is an empty data packet. 12. The device according to claim 9, wherein the determining unit is specifically configured to determine the data packet according to the modulation mode of the very high throughput signaling VHT-SIG-B frame segment of the data packet Is it an empty packet. 13. The device according to claim 12, wherein the determining unit is specifically configured to determine that the data packet is an empty data packet if the modulation mode of VHT-SIG-B is QBPSK. 14. A data communication device, characterized in that it comprises: A generating unit, configured to generate a data packet, the modulation mode of the frame segment of the data packet indicates whether the data packet is an empty data packet, and when the data packet is an empty data packet and the data packet is a non-empty data packet The modulation methods used by the frame segments are different; The sending unit is configured to send the data packet generated by the generating unit to the receiving end. 15. The device according to claim 14, characterized in that the generating unit is specifically configured to generate a data packet whose very high throughput signaling VHT-SIG-A frame segment modulates the first symbol of the first symbol The mode is binary phase shift keying BPSK, and the modulation mode of the second symbol of the VHT-SIG-A frame segment is quadrature binary phase shift keying QBPSK, so as to indicate that the data packet is an empty data packet. 16. The device according to claim 14, wherein the generating unit is specifically configured to generate a data packet, and the modulation mode of the very high throughput signaling VHT-SIG-B frame segment of the data packet is QBPSK, to indicate that the packet is an empty packet.