CN103001816A - Data communication method and data communication equipment - Google Patents
Data communication method and data communication equipment Download PDFInfo
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- CN103001816A CN103001816A CN2011102718126A CN201110271812A CN103001816A CN 103001816 A CN103001816 A CN 103001816A CN 2011102718126 A CN2011102718126 A CN 2011102718126A CN 201110271812 A CN201110271812 A CN 201110271812A CN 103001816 A CN103001816 A CN 103001816A
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Abstract
An embodiment of the invention provides a data communication method and data communication equipment which are capable of improving judgment efficiency of empty data packets. The data communication method includes receiving a data packet and determining whether the data packet is empty or not according to a modulation way of a frame fragment of the data packet or according to indication information carried in reserved bits or reserved status bits of the data packet. Since whether the data packet is empty or not is indicated according to according to a modulation way of a frame fragment of the data packet or according to indication information carried in reserved bits or reserved status bits of the data packet, and bit pattern comparison is omitted, complexity in empty data packet detection is reduced.
Description
Technical field
The embodiment of the invention relates to wireless communication field, and more specifically, relates to data communications method and equipment.
Background technology
Because the property complicated and changeable of wireless channel environment, transmitting terminal need to obtain necessary channel information by channel measurement mechanism, so that emission process is optimized.Such as the measurement by channel quality indication (CQI, Channel Quality Indicator), modulate and the selection of coded system (MCS, Modulation and Coding Scheme).
Channel measurement refers to by known training signal, the process that the channel condition information of the unknown is surveyed.Common channel condition information comprises channel quality indication (CQI), channel condition information (CSI, Channel State Information) etc.
Channel measurement is finished by known training signal (pilot tone) usually.Transmitting terminal carries out the detection of known signal by to training signal that the sending and receiving end consults in advance of receiving terminal emission at receiving terminal, obtains obtaining radio channel information by this testing process.Then, receiving terminal passes through the channel information that obtains to quantize again, feeds back to transmitting terminal in the mode of returning bag, and this has just finished channel measurement one time.
Empty packet (NDP, Null data packet) is not comprise data, only comprises the packet of pilot tone and some necessary control signals, and its Main Function is to carry out channel measurement.
Because NDP has omitted usually long data division, so for the design of time-division, the effectively length of compressed package.For example, in the system of time division duplex (TDD, Time Division Duplexing), emission NDP can so that transmitting terminal and receiving terminal are realized Fast Channel to be measured, shorten interaction time.
Adopt at present fixing bit pattern (bit pattern) to indicate NDP.Take 802.11ac as example, partly indicating this packet with fixing bit pattern at unusual high-throughput signaling VHT-SIG-B is NDP.VHT-SIG-B partly is mainly used in indicating the length of this sub-frame data and the modulation coding mode of employing.
Receiving terminal can will detect the bit of the VHT-SIG-B that extracts from packet, if can be fully corresponding to above-mentioned fixing bit pattern, then receiving terminal be processed this packet as NDP, no longer attempts the data of demodulation back; Otherwise think that this packet is not NDP, (for example length l ength and modulation demodulation system MCS) carries out demodulation to the data of back according to the control information of carrying among the VHT-SIG-B.
But this testing process is more loaded down with trivial details, needs receiving terminal VHT-SIG-B to be carried out the operations such as demodulation, decoding and bit pattern contrast.
Summary of the invention
The embodiment of the invention provides a kind of data communications method and equipment, can improve the judging efficiency of empty packet.
On the one hand, provide a kind of data communications method, having comprised: the receive data bag; According to the modulation system of the frame fragment of packet or the indication information that carries according to reservation bit or the reserved state position of packet, determine whether this packet is the sky packet.
On the other hand, provide a kind of data communications method, having comprised: whether the indication information designation data bag that generated data bag, the modulation system of the frame fragment of packet or the reservation bit of packet or reserved state position carry is the sky packet; Send packet to receiving terminal.
On the other hand, provide a kind of data communications equipment, having comprised: receiving element is used for the receive data bag; Determining unit is used for according to the modulation system of the frame fragment of packet or the indication information that carries according to reservation bit or the reserved state position of packet, and whether the specified data bag is the sky packet.
On the other hand, provide a kind of data communications equipment, having comprised: generation unit, be used for the generated data bag, the indication information that carry the modulation system of the frame fragment of packet or the reservation bit of packet or reserved state position indicates whether this packet is the sky packet; Transmitting element is used for sending described packet to receiving terminal.
Whether the embodiment of the invention is the sky packet by the modulation system of the frame fragment of packet or the reservation bit of packet or the indication information designation data bag that carry the reserved state position, need not to contrast bit pattern, thereby has reduced the complexity that empty packet detects.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of the physical layer frame structure of packet.
Fig. 2 is the flow chart of the data communications method of one embodiment of the invention.
Fig. 3 is the flow chart of the data communications method of another embodiment of the present invention.
Fig. 4 is the block diagram of the data communications equipment of one embodiment of the invention.
Fig. 5 is the block diagram of the data communications equipment of another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention is with WLAN (Wireless Local Access Network, WLAN (wireless local area network)) 802.11 agreements are that example is described, but the embodiment of the invention is not limited to this concrete protocol form, but also can be applied to similarly the packet of other wireless transmission.The physical layer frame structure of the packet that meets 802.11 agreements is at first described in conjunction with the schematic diagram of Fig. 1.Physical layer frame structure has stipulated that the function of a packet (or frame) is divided and time/frequency takies relation.
As shown in Figure 1, wherein frame fragment L-STF, L-LTF, VHT-STF, VHT-LTF1 ..., VHT-LTFN is training sequence, be used for synchronously and channel estimating.Meet in the frame fragment of 802.11ac agreement, L-SIG and very the first symbol 11 of high-throughput signaling VHT-SIG-A (corresponding to the 20-24 μ s of packet, be also referred to as VHT-SIG-A1) and very high-throughput signaling VHT-SIG-B adopt BPSK (Binary Phase Shift Keying, binary phase shift keying) modulation system, the second symbol 12 of VHT-SIG-A (the 24-28 μ s corresponding to packet is also referred to as VHT-SIG-A2) adopts QBPSK (Quadrature BPSK, quadrature binary phase shift keying) modulation system.QBPSK is the modulation system that BPSK adds 90 degree phase rotatings.
In 802.11 agreements, two symbols 11 of VHT-SIG-A and 12 adopt the different modulating modes to be mainly used in distinguishing the subframe structure of diversity of protocol versions.Be to guarantee backwards compatibility, the mode that adopts BPSK to add phase rotating in 802.11 is partly modulated SIG.All sub-frame frame structures are identical in 0～20 μ s part, since the 20th μ s, adopt different modulation systems that the different frame structure is distinguished, such as:
If the first symbol 11 and second symbol 12 all adopt BPSK, QPSK (Quadrature Phase Shift Keying, Quadrature Phase Shift Keying) or QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) modulation system, this frame is the 802.11a/g frame so.
If the first symbol 11 and second symbol 12 adopt the QBPSK modulation system, can judge that so this frame is the 802.11n frame.
If the first symbol 11 adopts the BPSK modulation system, second symbol 12 adopts the QBPSK modulation system, and this frame is the 802.11ac frame so.
Adopt at present fixing bit pattern to indicate NDP.Take 802.11ac as example, partly indicating this packet with fixing bit pattern at VHT-SIG-B is NDP.VHT-SIG-B partly is mainly used in indicating the length of this sub-frame data and the modulation coding mode of employing.
Receiving terminal can will detect the bit of the VHT-SIG-B that extracts from packet, if can be fully corresponding to above-mentioned fixing bit pattern, then receiving terminal be processed this packet as NDP, no longer attempts the data of demodulation back; Otherwise think that this packet is not NDP, (for example length l ength and modulation demodulation system MCS) carries out demodulation to the data of back according to the control information of carrying among the VHT-SIG-B.
But this testing process is more loaded down with trivial details, needs receiving terminal VHT-SIG-B to be carried out the operations such as demodulation, decoding and bit pattern contrast.
Fig. 2 is the flow chart of the data communications method of one embodiment of the invention.The method of Fig. 2 is carried out by the transmitting terminal of packet.
201, generated data bag, the indication information that carry the modulation system of the frame fragment of this packet or the reservation bit of this packet or reserved state position indicate whether this packet is the sky packet.
Alternatively, as an embodiment, when utilizing the modulation system designation data bag type of frame fragment, take the frame structure of 802.11 packets shown in Figure 1 as example, can be so that two symbols (the first symbol 11 and second symbol 12 shown in Figure 1) of VHT-SIG-A part adopt different BPSK modulation systems.For example, if the modulation system of the first symbol 11 of the VHT-SIG-A frame fragment of packet is BPSK, the modulation system of the second symbol 12 of VHT-SIG-A frame fragment is QBPSK, to indicate this packet as NDP.In other cases, for example the modulation system of the first symbol 11 is QBPSK, and the modulation system of second symbol 12 is BPSK, and then can indicate this packet is non vacuum data bag (the non vacuum data bag of 802.11ac agreement).At this moment, for NDP, transmitting terminal need not to process especially the VHT-SIG-B part.
Alternatively, as another embodiment, when utilizing the modulation system designation data bag type of frame fragment, can be by the modulation system designation data bag type of VHT-SIG-B.For example, if the modulation system of VHT-SIG-B is QBPSK, then indicating this packet is NDP.In other cases, for example, if the modulation system of VHT-SIG-B is BPSK, then indicating this packet is non-NDP.
Alternatively, as another embodiment, can utilize the type of the reservation bit explicitly designation data bag in the packet.Take the 801.11ac agreement as example, the B2 position of VHT-SIG-A1 and the B9 position of B23 position and VHT-SIG-A2 etc. are reservation bit (reserved) in the B4 position of L-SIG, the VHT-SIG-A signaling at present, can utilize the one or more bits in these reservation bits to come explicitly designation data bag type.
As example, if this B4 position is set to 0, can represent that then this packet is NDP with the B4 position of using L-SIG, if perhaps this B4 position is set to 1, can represent that then this packet is non-NDP.Vice versa, if namely this B4 position is set to 1, can represent that then this packet is NDP, if perhaps this B4 position is set to 0, can represent that then this packet is non-NDP.Therefore the example of other reservation bits similarly repeats no more.
Alternatively, as another embodiment, can utilize the type of the reserved state position explicitly designation data bag in the packet.So-called reserved state position refers to the state indicating bit that is not utilized.
Take the 801.11ac agreement as example, in L-SIG, Rate (speed) field one has 4 bits, can represent 2
4=16 kinds of states, but only used at present wherein 8 kinds of message transmission rates of 8 kinds of states (1101,1111,0101,0111,1001,1011,0001,0011) expression.Be not utilized 8 in mode bit can be used for explicitly and indicate whether this packet is NDP.For example, the Rate field of " 0000 " can represent that this packet is NDP.
As another example, the Group ID among the VHT-SIG-A (group sign) is 6 bits altogether, and wherein Group ID=1 is reserved state at present, therefore can be set to 1 by Group ID and carry out the NDP indication.
As another example, can utilize Length (length) reserved state among the VHT-SIG-B to indicate NDP.Length among the VHT-SIG-B is that full 0 is reserved state, and can indicate this packet with this state is NDP.
202, send packet to receiving terminal.
The above-mentioned Packet Generation that transmitting terminal will generate in step 201 is to receiving terminal, so that receiving terminal is according to the indication information that carries in the modulation system of the frame fragment of packet or the reservation bit according to packet, determine whether this packet is NDP, and carry out corresponding the processing.
Whether the embodiment of the invention is the sky packet by the modulation system of the frame fragment of packet or the reservation bit of packet or the indication information designation data bag that carry the reserved state position, need not to contrast bit pattern, thereby has reduced the complexity that empty packet detects.
In the situation of the different modulating mode designation data bag type of two symbols that utilize the VHT-SIG-A frame fragment, transmitting terminal and receiving terminal all need not to process the VHT-SIG-B part, receiving terminal only need judge that the modulation system of two symbols of VHT-SIG-A gets final product, omit the processes such as demodulation, decoding, can reduce the processing complexity.
On the other hand, in the situation of the modulation system designation data bag type of utilizing the VHT-SIG-B frame fragment, only need to judge that the modulation system of VHT-SIG-B gets final product when receiving terminal is processed, not need the processes such as demodulation, decoding, can reduce the processing complexity.
The scheme of above-mentioned modulation system designation data bag type by frame fragment can also and current bit pattern detection scheme unite use, can further reduce the probability of NDP erroneous judgement.
In addition, in the situation of utilizing reservation bit or reserved state position explicitly designation data bag type, receiving terminal only need be resolved corresponding reservation bit or reserved state position, also can reduce the processing complexity.
Fig. 3 is the flow chart of the data communications method of another embodiment of the present invention.The method of Fig. 3 is carried out by receiving terminal, and corresponding with the method for Fig. 2, therefore will suitably omit detailed description.
301, the receive data bag.
For example, the packet that the packet that receives in step 301 can generate and send according to the method for Fig. 1.Alternatively, as an embodiment, above-mentioned packet meets the 802.11ac agreement, and the indication information that wherein carries in the reservation bit of the modulation system of the frame fragment of packet or packet indicates whether this packet is the sky packet.
302, according to the modulation system of the frame fragment of packet or the indication information that carries according to reservation bit or the reserved state position of packet, whether the specified data bag is the sky packet.
Alternatively, as an embodiment, indicate in the modulation system of the frame fragment of above-mentioned packet in the situation of type of this packet, receiving terminal can be according to the first symbol 11 of the VHT-SIG-A frame fragment of packet and the modulation system of second symbol 12, and whether the specified data bag is NDP.Wherein, referring to Fig. 1, the first symbol 11 is corresponding to the 20-24 μ s in the packet, and second symbol 12 is corresponding to the 24-28 μ s in the packet.
For example, if the modulation system of the first symbol 11 is BPSK, the modulation system of second symbol 12 is QBPSK, can determine that then this packet is NDP.In other cases, for example the modulation system of the first symbol 11 is QBPSK, and the modulation system of second symbol 12 is BPSK, and then can indicate this packet is non-NDP (the non-NDP of 802.11ac agreement).At this moment, for NDP, receiving terminal need not to process the VHT-SIG-B part again.
Alternatively, as an embodiment, indicate in the modulation system of the frame fragment of above-mentioned packet in the situation of type of this packet, whether receiving terminal can be NDP by the modulation system specified data bag of VHT-SIG-B.For example, if the modulation system of VHT-SIG-B is QBPSK, can determine that then this packet is NDP.In other cases, for example, if the modulation system of VHT-SIG-B is BPSK, can determine that then this packet is non-NDP.
Receiving terminal can be judged modulation system according to the size of numeric field signal real part and imaginary part energy, and then judges whether this packet is NDP.For example, if numeric field signal real part energy, determines then that modulation system is BPSK much larger than the imaginary part energy; If numeric field signal real part energy, determines then that modulation system is QBPSK much smaller than the imaginary part energy; If numeric field signal real part energy and imaginary part energy are substantially equal, determine that then modulation system is QPSK or QAM.
Alternatively, as an embodiment, whether be in the situation of NDP with the reservation bit explicitly designation data bag in the packet, receiving terminal can be resolved corresponding reservation bit, and then the type of specified data bag.For example, as mentioned above, take the 801.11ac agreement as example, the B2 position of VHT-SIG-A1 and the B9 position of B23 position and VHT-SIG-A2 etc. are reservation bit (reserved) in the B4 position of L-SIG, the VHT-SIG-A signaling at present, can utilize the one or more bits in these reservation bits to come explicitly designation data bag type.
As example, if this B4 position is set to 0, can determine that then this packet is NDP with the B4 position of using L-SIG, if perhaps this B4 position is set to 1, can determine that then this packet is non-NDP.Vice versa, if namely this B4 position is set to 1, can represent that then this packet is NDP, if perhaps this B4 position is set to 0, can represent that then this packet is non-NDP.Therefore the example of other reservation bits similarly repeats no more.
Alternatively, as another embodiment, in the situation of the type of the reserved state position explicitly designation data bag in utilizing packet, receiving terminal can be resolved corresponding reserved state position, and then the type of specified data bag.So-called reserved state position refers to the state indicating bit that is not utilized.
As mentioned above, take the 801.11ac agreement as example, in L-SIG, Rate (speed) field one has 4 bits, can represent 2
4=16 kinds of states, but only used at present wherein 8 kinds of message transmission rates of 8 kinds of states (1101,1111,0101,0111,1001,1011,0001,0011) expression.Be not utilized 8 in mode bit can be used for explicitly and indicate whether this packet is NDP.For example, the Rate field of " 0000 " can represent that this packet is NDP.
As another example, the Group ID among the VHT-SIG-A (group sign) is 6 bits altogether, and wherein Group ID=1 is reserved state at present, therefore can be set to 1 by Group ID and carry out the NDP indication.
As another example, can utilize Length (length) reserved state among the VHT-SIG-B to indicate NDP.Length among the VHT-SIG-B is that full 0 is reserved state, and can indicate this packet with this state is NDP.
The embodiment of the invention by the frame fragment of packet modulation system or the reservation bit of packet in the indication information designation data bag that carries whether be the sky packet, need not to contrast bit pattern, thereby reduced the complexity that empty packet detects.
In the situation of the different modulating mode designation data bag type of two symbols that utilize the VHT-SIG-A frame fragment, transmitting terminal and receiving terminal all need not to process the VHT-SIG-B part, receiving terminal only need judge that the modulation system of two symbols of VHT-SIG-A gets final product, omit the processes such as demodulation, decoding, can reduce the processing complexity.
On the other hand, in the situation of the modulation system designation data bag type of utilizing the VHT-SIG-B frame fragment, only need to judge that the modulation system of VHT-SIG-B gets final product when receiving terminal is processed, not need the processes such as demodulation, decoding, can reduce the processing complexity.
The scheme of above-mentioned modulation system designation data bag type by frame fragment can also and current bit pattern detection scheme unite use, can further reduce the probability of NDP erroneous judgement.
In addition, in the situation of utilizing reservation bit or reserved state position explicitly designation data bag type, receiving terminal only need be resolved corresponding reservation bit or reserved state position, also can reduce the processing complexity.
Fig. 4 is the block diagram of the data communications equipment of one embodiment of the invention.An example of the data communications equipment 40 of Fig. 4 is transmitting terminal, comprises generation unit 41 and transmitting element 42.
Whether the embodiment of the invention is the sky packet by the modulation system of the frame fragment of packet or the reservation bit of packet or the indication information designation data bag that carry the reserved state position, need not to contrast bit pattern, thereby has reduced the complexity that empty packet detects.
The various piece of data communications equipment 40 can be carried out each process of method shown in Figure 2, for avoiding repetition, is not described in detail.
For example, as an embodiment, the packet that generation unit 41 generates can meet the 802.11ac agreement.The modulation system of the first symbol of the VHT-SIG-A frame fragment of this packet is BPSK, and the modulation system of the second symbol of VHT-SIG-A frame fragment is QBPSK, to indicate this packet as NDP.Referring to Fig. 1, the first symbol 11 can be corresponding to the 20-24 μ s (VHT-SIG-A1) in the packet, and second symbol 12 can be corresponding to the 24-28 μ s (VHT-SIG-A2) in the packet.This moment, transmitting terminal and receiving terminal all need not to process the VHT-SIG-B part, and receiving terminal only need judge that the modulation system of two symbols of VHT-SIG-A gets final product, and has omitted the processes such as demodulation, decoding, can reduce the processing complexity.
Alternatively, as another embodiment, the packet that generation unit 41 generates can meet the 802.11ac agreement.The modulation system of the VHT-SIG-B frame fragment of this packet is QBPSK, to indicate this packet as the sky packet.Only need to judge that the modulation system of VHT-SIG-B get final product when receiving terminal is processed this moment, do not need the processes such as demodulation, decoding, can reduce the processing complexity.
The scheme of above-mentioned modulation system designation data bag type by frame fragment can also and current bit pattern detection scheme unite use, can further reduce the probability of NDP erroneous judgement.
Alternatively, as another embodiment, the packet that generation unit 41 generates can utilize the type of the reservation bit explicitly designation data bag in the packet.Take the 801.11ac agreement as example, the B2 position of VHT-SIG-A1 and the B9 position of B23 position and VHT-SIG-A2 etc. are reservation bit in the B4 position of L-SIG, the VHT-SIG-A signaling at present, can utilize the one or more bits in these reservation bits to come explicitly designation data bag type.In addition, can utilize the type of the reserved state position explicitly designation data bag in the packet.At this moment, receiving terminal only need be resolved corresponding reservation bit or reserved state position, also can reduce the processing complexity.
Fig. 5 is the block diagram of the data communications equipment of one embodiment of the invention.An example of the data communications equipment 50 of Fig. 5 is receiving terminal, comprises receiving element 51 and determining unit 52.
Receiving element 51 receive data bags.Determining unit 52 determines according to the modulation system of the frame fragment of the packet of receiving element 51 receptions or the indication information that carries according to reservation bit or the reserved state position of this packet whether this packet is NDP.
The various piece of data communications equipment 50 can be carried out each process of method shown in Figure 3, for avoiding repetition, is not described in detail.
For example, as an embodiment, the packet that receiving element 51 receives can meet the 802.11ac agreement.Determining unit 52 can be according to the first symbol of the VHT-SIG-A frame fragment of packet and the modulation system of second symbol, and whether the specified data bag is the sky packet.Referring to Fig. 1, the first symbol 11 can be corresponding to the 20-24 μ s in the packet, and second symbol 12 can be corresponding to the 24-28 μ s in the packet.
For example, if the modulation system of the first symbol 11 is BPSK, the modulation system of second symbol 12 is QBPSK, and then determining unit 52 can determine that this packet is empty packet.This moment, transmitting terminal and receiving terminal all need not to process the VHT-SIG-B part, and receiving terminal only need judge that the modulation system of two symbols of VHT-SIG-A gets final product, and has omitted the processes such as demodulation, decoding, can reduce the processing complexity.
Alternatively, as another embodiment, the packet that receiving element 51 receives can meet the 802.11ac agreement.Determining unit 52 can be according to the modulation system of the VHT-SIG-B frame fragment of packet, and whether the specified data bag is the sky packet.For example, if the modulation system of VHT-SIG-B is QBPSK, but then determining unit 52 specified data bags are empty packet.Only need to judge that the modulation system of VHT-SIG-B get final product when receiving terminal is processed this moment, do not need the processes such as demodulation, decoding, can reduce the processing complexity.
The scheme of above-mentioned modulation system designation data bag type by frame fragment can also and current bit pattern detection scheme unite use, can further reduce the probability of NDP erroneous judgement.
Alternatively, as another embodiment, the packet that receiving element 51 receives can utilize the type of the reservation bit explicitly designation data bag in the packet.Take the 801.11ac agreement as example, the B2 position of VHT-SIG-A1 and the B9 position of B23 position and VHT-SIG-A2 etc. are reservation bit in the B4 position of L-SIG, the VHT-SIG-A signaling at present, can utilize the one or more bits in these reservation bits to come explicitly designation data bag type.In addition, can utilize the type of the reserved state position explicitly designation data bag in the packet.At this moment, 52 of determining units need to resolve corresponding reservation bit or reserved state position, thereby whether the specified data bag is NDP, so also can reduce the processing complexity.
Communication system according to the embodiment of the invention can comprise above-mentioned data communications equipment 40 or 50.
Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The those skilled in the art can be well understood to, and is the convenience described and succinct, and the specific works process of the system of foregoing description, device and unit can with reference to the corresponding process among the preceding method embodiment, not repeat them here.
In several embodiment that the application provides, should be understood that disclosed system, apparatus and method can realize by another way.For example, device embodiment described above only is schematic, for example, the division of described unit, only be that a kind of logic function is divided, during actual the realization other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, the shown or coupling each other discussed or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
Described unit as separating component explanation can or can not be physically to separate also, and the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select according to the actual needs wherein some or all of unit to realize the purpose of present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing unit, also can be that the independent physics of unit exists, and also can be integrated in the unit two or more unit.
If described function realizes with the form of SFU software functional unit and during as independently production marketing or use, can be stored in the computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or the part of this technical scheme can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), the various media that can be program code stored such as random access memory (RAM, Random Access Memory), magnetic disc or CD.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (16)
1. a data communications method is characterized in that, comprising:
The receive data bag;
According to the modulation system of the frame fragment of described packet or the indication information that carries according to reservation bit or the reserved state position of described packet, determine whether described packet is the sky packet.
2. the method for claim 1 is characterized in that, the modulation system of described frame fragment according to described packet determines that whether described packet is the sky packet, comprising:
According to the first symbol of the very high-throughput signaling VHT-SIG-A frame fragment of described packet and the modulation system of second symbol, determine whether described packet is the sky packet.
3. method as claimed in claim 2 is characterized in that, the first symbol of described very high-throughput signaling VHT-SIG-A frame fragment according to described packet and the modulation system of second symbol determine that whether described packet is the sky packet, comprising:
If the modulation system of described the first symbol is binary phase shift keying BPSK, the modulation system of described second symbol is quadrature binary phase shift keying QBPSK, determines that then described packet is empty packet.
4. the method for claim 1 is characterized in that, the modulation system of described frame fragment according to described packet determines that whether described packet is the sky packet, comprising:
According to the modulation system of the very high-throughput signaling VHT-SIG-B frame fragment of described packet, determine whether described packet is the sky packet.
5. method as claimed in claim 4 is characterized in that, the modulation system of described very high-throughput signaling VHT-SIG-B frame fragment according to described packet determines that whether described packet is the sky packet, comprising:
If the modulation system of VHT-SIG-B is QBPSK, determine that then described packet is empty packet.
6. a data communications method is characterized in that, comprising:
Generated data bag, the indication information that carries in the modulation system of the frame fragment of described packet or the reservation bit of described packet indicate whether described packet is the sky packet;
Send described packet to receiving terminal.
7. method as claimed in claim 6 is characterized in that, described generated data bag comprises:
The generated data bag, the modulation system of the first symbol of the very high-throughput signaling VHT-SIG-A frame fragment of described packet is binary phase shift keying BPSK, the modulation system of the second symbol of described VHT-SIG-A frame fragment is quadrature binary phase shift keying QBPSK, to indicate described packet as the sky packet.
8. method as claimed in claim 6 is characterized in that, described generated data bag comprises:
The generated data bag, the modulation system of the very high-throughput signaling VHT-SIG-B frame fragment of described packet is QBPSK, to indicate described packet as the sky packet.
9. a data communications equipment is characterized in that, comprising:
Receiving element is used for the receive data bag;
Determining unit is used for the modulation system of frame fragment of the packet that receives according to described receiving element or the indication information that carries according to reservation bit or the reserved state position of described packet, determines whether described packet is the sky packet.
10. equipment as claimed in claim 9, it is characterized in that, described determining unit specifically is used for determining according to the first symbol of the very high-throughput signaling VHT-SIG-A frame fragment of described packet and the modulation system of second symbol whether described packet is the sky packet.
11. equipment as claimed in claim 10, it is characterized in that, if it is binary phase shift keying BPSK that described determining unit specifically is used for the modulation system of described the first symbol, the modulation system of described second symbol is quadrature binary phase shift keying QBPSK, determines that then described packet is empty packet.
12. equipment as claimed in claim 9 is characterized in that, described determining unit specifically is used for the modulation system according to the very high-throughput signaling VHT-SIG-B frame fragment of described packet, determines whether described packet is the sky packet.
13. equipment as claimed in claim 12 is characterized in that, is QBPSK if described determining unit specifically is used for the modulation system of VHT-SIG-B, determines that then described packet is empty packet.
14. a data communications equipment is characterized in that, comprising:
Generation unit is used for the generated data bag, and the indication information that the modulation system of the frame fragment of described packet or the reservation bit of described packet or reserved state are carried indicates whether described packet is the sky packet;
Transmitting element is used for sending the packet that described generation unit generates to receiving terminal.
15. equipment as claimed in claim 14, it is characterized in that, described generation unit specifically is used for the generated data bag, the modulation system of the first symbol of the very high-throughput signaling VHT-SIG-A frame fragment of described packet is binary phase shift keying BPSK, the modulation system of the second symbol of described VHT-SIG-A frame fragment is quadrature binary phase shift keying QBPSK, to indicate described packet as the sky packet.
16. equipment as claimed in claim 14 is characterized in that, described generation unit specifically is used for the generated data bag, and the modulation system of the very high-throughput signaling VHT-SIG-B frame fragment of described packet is QBPSK, to indicate described packet as the sky packet.
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