CN110035457A - Wireless communications method and its equipment - Google Patents
Wireless communications method and its equipment Download PDFInfo
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- CN110035457A CN110035457A CN201811234760.3A CN201811234760A CN110035457A CN 110035457 A CN110035457 A CN 110035457A CN 201811234760 A CN201811234760 A CN 201811234760A CN 110035457 A CN110035457 A CN 110035457A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
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Abstract
The application provides a kind of method and apparatus of wireless communication." GI+LTF size " field is redefined to indicate the Combination nova of GI duration Yu HE-LTF size.When the two, the value of other existing fields is combined when indicating invalid scene, since the two values answer mutual exclusion, thus is indicated and is redefined.Specifically, DCM field and STBC field are each arranged to " enable " mode, as the instruction for redefining " GI+LTF size " field.Once receiving this PPDU, receiver is not enabled for the PPDU to be resolved to DCM and STBC.The specific combination of DCM value and STBC value is translated into " GI+LTF size " field and is redefined to indicate the instruction of GI duration with the Combination nova of HE-LTF size by receiver.The application overcomes bit length to limit, and provides the instruction of additional mode, and does not change existing PPDU structure.
Description
Technical field
The present invention relates to network communication fields, more particularly to the communication protocol field in Wi-Fi network communication.
Background technique
In efficient wireless communication, physical layer convergence protocol (Physical Layer Convergence
Protocol, PLCP) protocol Data Unit (Presentation Protocol Data Unit, PPDU) lead code
(preamble) efficient (high efficiency, HE) long training field (long training field, LTF) may be contained
(HE-LTF) symbol, the symbol can be used for carrying out channel estimation at receiver.For example, receiver can be estimated based on HE-LTF
One group between constellation mapper and receiver chain multiple-input and multiple-output (multiple input multiple output,
MIMO) channel.Alternatively, if PPDU uses space-time block coding (Space Time Block Coding, STBC), then HE-
LTF provides the method for the mimo channel between estimation STBC encoder output and receiver chain for receiver.
IEEE802.11ax standards and specifications define the duration of HE-LTF by compress mode, to optimize various fields
The performance of scape.HE physical layer can support 3.2 μ s (compression of 1x HE-LTF 1/4), 6.4 μ s (compression of 2x HE-LTF 1/2) and
The LTF symbol duration of 12.8 μ s (4x HE-LTF is uncompressed).
It between the symbol of HE-LTF, is inserted into protection interval (guard interval, GI), the protection interval is for preventing
Such as in channel echo or reflection caused by intersymbol interference (inter-symbol interference, ISI).It is according with
GI is inserted between number can be solved echo or reflection problems before transmitting in next symbol.
Long GI between symbol can effectively prevent ISI, but due to increasing free time, also inevasible increasing
Resource overhead is added.On the other hand, short GI can increase the handling capacity of data transmission, however if GI is too short, the quantity meeting of ISI
Increase, so as to cause throughput of transmissions is reduced.
For meeting the communication of IEEE820.11n/ac/ax standards and specifications, beam forming has been current most normal
Communication transmission mode.In beam forming, the channel state information of compression (channel state information,
CSI) feedback has abandoned the common angles (common angle) of each feedback vector.Therefore, in the scene of beam forming, for
Single user (single user, SU) MIMO and multi-user (multi-user, MU) MIMO, due between different subcarriers
Phase ambiguity (ambiguity), 1x and 2x HE-LTF cannot be sometimes successfully inserted into 4x HE-LTF.Specifically, because
For numerous different channels, phase alignment does not ensure that the channel of interpolation is matched with actual channel.For some channels, channel
Phase itself does not match with the alignment phase of introducing.In phase alignment it cannot be guaranteed that the case where channel is properly inserted into
Under, common solution is using 4x LTF.
According to IEEE 802.11ax, 2 bits in PPDU lead code are assigned to " GI+LTF size " field, with fixed
Adopted HE-LTF size be combined with 4 kinds of possibility of GI duration.That is, " GI+LTF size "=0 indicate 1x HE-LTF with
And 0.8 μ s GI；The GI of the expression of " GI+LTF size "=1 2x HE-LTF and 0.8 μ s；" GI+LTF size "=2 indicate 2x
The GI of HE-LTF and 1.6 μ s；The GI of the expression of " GI+LTF size "=3 4x HE-LTF and 3.2 μ s.By " GI+LTF size "
This 4 kinds of modes indicated are not the optimum combinations for all types PPDU transmission.In order to use 4x HE-LTF, payload
(payload) in all orthogonal frequency division multiplexing (orthogonal frequency-division multiple access,
OFDMA) symbol must use the GI of 3.2 μ s.However, channel time delay expands for the example of most of SU MIMO or MU MIMO
Exhibition is shorter than 3.2 μ s.Compared to the GI of 0.8 μ s, reduce data transmission rate to be up to about 21% using the GI of 3.2 μ s.
Unfortunately, all lead code bits of existing PPDU structure have been used for or are preserved for specific instruction, by this
Kind limitation, is difficult to introduce any additional HE-LTF/GI mode, cannot because " GI+LTF size " field only has 2 bits
Indicate 4 kinds or more of combination option.
Summary of the invention
Therefore, presently disclosed embodiment is directed toward a kind of mechanism, and the bit length of " GI+LTF size " field is overcome to limit
System, and the instruction of GI duration with one or more additional modes of HE-LTF size are provided in PLCP PPDU, without
Any change to existing PPDU structure.
Embodiments herein combines the field (" GI+LTF size " field) for being used to indicate GI/HE-LTF mode, again
Two existing fields in PPDU lead code are defined, the new model as GI duration and HE-LTF size is (or here
Referred to as " GI/HE-LTF mode ") instruction.Specifically, the value that the two fields are set is by being grouped together traditionally
It indicates it is not possible that or invalid scene.When receiver receives PPDU, the specific combination of the two field values is interpreted GI/HE-
The instruction (or a part of instruction) of the new model of LTF, and be ignored by the original meaning that these values individually indicate.
In some embodiments, Shuangzi carrier modulation (the Dual Sub-Carrier in PPDU lead code
Modulation, DCM) field and STBC field be used to introduce the new model of GI/HE-LTF size, and which cannot be by " GI+
Any value of LTF size " field individually indicates.New model can be GI the 1x HE LTF of 4x HE LTF and 0.8 μ s
And 0.4 μ s GI etc..In order to indicate that this new model, DCM field and STBC field are all set to 1 (being enabled), and
And for example, " GI+LTF size " field is arranged to 3.Since for PPDU, DCM and STBC cannot be enabled, so
Receiver, which is configured as resolving to PPDU into DCM and STBC, not to be enabled.More precisely, receiver is by DCM=1 and STBC=
1 specific combination is construed to the instruction that " GI+LTF size " field is redefined.If " GI+LTF size " field is set
It is 3, the GI of itself instruction 4x LTF and 3.2 μ s, then receiver is processed into the new mould of the GI of 4x LTF and 0.8 μ s
The instruction of formula.
Therefore, according to an embodiment of the present application, by the way that the particular value of two other existing fields to be combined, Ke Yiyou
The GI/HE-LTF mode that cannot be individually indicated by " GI+LTF size " field is indicated sharply.This mode advantageously effectively makes
With the existing field in PPDU lead code, and extend the instruction ability of these fields.Therefore, introduce to new operation mode or
The instruction of other specifications, without require that changing any format or structure in existing PPDU lead code.
The application by combination PPDU lead code in other existing fields particular value, thus provide the GI duration with
The instruction of one or more additional modes of HE-LTF size changes existing PPDU structure without any.Advantageously make it possible to
Effectively using the existing field in PPDU lead code, and extend the instruction ability of these fields.
Aforementioned is summary of the invention, therefore, only necessarily includes the simplification illustrated, summarizes and saved to details
Slightly.It will be appreciated by persons skilled in the art that the content of present invention is only signal, it is no intended to the limitation of any mode.Such as
It is limited only by the claims that follow, other aspects, creative feature and beneficial effects of the application, it will be illustrated non-below
It is become apparent in restrictive specific embodiment.
Detailed description of the invention
Embodiments herein may be better understood, wherein phase by reading following specific descriptions in conjunction with following attached drawing
Identical element is specified with quotation mark.
Fig. 1 shows showing for the GI/HE-LTF mode that redefines according to the embodiment of the present application for indicating PPDU
Example property HE SU PPDU field.
It includes the generation PPDU for redefining " GI+LTF size " field that Fig. 2, which is depicted according to the embodiment of the present application,
The flow chart of exemplary flow.
Fig. 3 depicts the PPDU for having " GI+LTF size " field redefined according to the parsing of the embodiment of the present application
Exemplary flow flow chart.
Fig. 4 is shown according to the embodiment of the present application for generating the PPDU with the GI/HE-LTF mode redefined
Example wireless communication device configuration structural schematic diagram.
Fig. 5 be show according to the embodiment of the present application for parse receive with the GI/HE-LTF mould redefined
The structural schematic diagram of the configuration of the example wireless communication device of the PPDU of formula.
Specific embodiment
Preferred embodiment of the present application is described in detail below, example is shown in following attached drawing.Although this
Application will be described in conjunction with the preferred embodiments, but it is understood that, it is not intended to and the application is limited to these implementations
Example.On the contrary, the application is intended to cover substitution, modification or equivalent, can be included in as defined in appended claims originally
In the spirit and scope of application.In addition, many specific details are illustrated in the following specific descriptions of the embodiment of the present application, with
Just the application is understood thoroughly.However, it will be appreciated by the appropriately skilled person that the application can be implemented without these specific
Details.In other examples, well known method, program, component and circuit are without being described in detail, unnecessarily to obscure this
Apply for the aspect of embodiment.Although for clarity, a kind of method can be described as multiple steps of sequence, label without
It need to indicate the sequence of these steps.It should be understood that some steps can be skipped, it is parallel to execute or without keeping stringent sequence
Column sequentially execute.Show that the attached drawing of the embodiment of the present application is semi-graphic, and will be without scaling, and specifically, one
A little sizes and are displayed magnified in the accompanying drawings to clearly show.Similarly, although describing the view in attached drawing for convenience
Usually show similar direction, but this description in attached drawing is arbitrary for major part.Usual the application can be with
It is operated in any way.
The mechanism of short protection interval (GI) instruction in efficient WLAN
Generally speaking, embodiments herein provides a kind of machine of instruction ability for extending existing PPDU preamble field
System.In some embodiments, " GI+LTF size " field is redefined to indicate the new of GI duration and HE-LTF size
Mode (or the mode redefined).When the value of two other existing fields is combined to indicate invalid scene (invalid
When scenario), because the two values should be when being mutual exclusion (mutually exclusive), it is this again fixed to indicate
Justice.
The PLCP PPDU structure in conjunction with defined in 802.11 race of IEEE carries out specifically embodiments herein
It is bright.However, the application is also not necessarily limited to any particular industry standard or rule neither limited to any particular data packet format or structure
Model.
Fig. 1 is shown according to the embodiment of the present application for indicating the additional GI/HE-LTF mould redefined of PPDU
The exemplary HE SU PPDU field of formula.As defined in IEEE 802.11ax standard and specification, it is assumed that " GI+LTF size "
Field has 2 bits, and as shown in table 1, the field itself, can only indicate that 4 kinds of GI duration and LTF size are solid
Fixed combination.
Table 1
DCM field has 1 bit, and for indicating: modulation and encoding scheme (Modulation and for instruction
Coding Scheme, MCS), whether DCM is applied to data field.When DCM field is arranged to 1, indicate that DCM is answered
With (being enabled)；And when DCM field is arranged to 0, indicate that DCM is not applied.DCM is only applied to MCS0, MCS
1, MCS 3 and MCS 4.STBC field has 1 bit, and compiles when the field is arranged to 1 commonly used in block when expression sky
Code (STBC) is used on PPDU.If STBC is applied, DCM is not applied.In this example, GI+LTF size field
111, DCM field 112 and STBC field 113 are included in the HE-SIG-A field 110 being comprised in PPDU lead code.
As discussed above, it is desired to the GI duration can be used to combine with other of LTF size, for example, 4x HE-LTF and GI
Duration is shorter than 3.2 μ s.According to an embodiment of the present application, as described in Figure 1, DCM field 112 and STBC field 113 are set
It is set to 1, to indicate the group other than " GI+LTF size " field 111 is redefined instruction 4 kinds of combinations shown in the table 1
It closes.Therefore, the HE-LTF field 120 in PPDU is configured as indicated combination.
It enables to be mutual exclusion with STBC since DCM is enabled for PPDU, receiver is configured as that DCM=1 will be carried
DCM and STBC is resolved to the PPDU of STBC=1 not to be enabled.More precisely, receiver is advantageously by DCM=1 and STBC
=1 combination interpretation is the instruction that " GI+LTF size " field is redefined.For example, if " GI+LTF size " field is set
Be set to 3 (as shown in the figure), the GI of itself original representation 4x LTF and 3.2 μ s, but receiver be construed as 4x LTF with
And 0.8 μ s GI new model instruction.If " GI+LTF size " field is arranged to 0, itself original representation 1x LTF
And 0.8 μ s GI, but receiver is construed as the instruction of the new model of the GI of 1x LTF and 0.4 μ s.It is understood that
It is that, in the case where not departing from scope of the present application, any other defining mode again of GI duration and LTF size can
To be indicated by DCM field, STBC field and " GI+LTF size " field.In addition, the application be not limited to using DCM field and
STBC field, to indicate that " GI+LTF size " field redefines.In order to implement the present invention, also can be used initially allocated
It is used to indicate the various appropriate fields of other specifications.
Therefore, according to an embodiment of the present application, pass through the particular value of two other existing fields of combination, it can be advantageous to refer to
Show the GI/HE-LTF mode that cannot be individually indicated by " GI+LTF size " field.This mode advantageously makes it possible to effectively use
Existing field in PPDU lead code, and extend the instruction ability of these fields.Therefore, can introduce new operation mode or its
The instruction that he standardizes, without require that changing any existing format or structure in PPDU lead code.
It includes the generation PPDU for redefining " GI+LTF size " field that Fig. 2, which is depicted according to the embodiment of the present application,
The flow chart of exemplary flow 200.Process 200 can be executed by the associated component in transmitter device, for example, wireless access point
(access point, AP) stands (station, STA) or non-AP STA.In the present example it is assumed that " GI+LTF size " field,
DCM field and STBC field are assigned the identical instruction function described referring to Fig.1.
In 201, determine using the GI/HE-LTF mode of PPDU redefined (for example, 4x HE-LTF and 0.8 μ s
GI), which is not included on can be individually by the mode represented by " GI+LTF size " field of 2 bits.For example, because
The mode that PPDU will be transmitted in MIMO transmission, thus this is selected to redefine.However, the application is not limited to this answer
With.
In 202, according to redefining, the value redefined is set by " GI+LTF size " field, to indicate HE-
The expectation of LTF size selects.For example, in this example, " GI+LTF size " field is arranged to 3,4x LTF is indicated.?
In 203, DCM field is set to indicate that enabled (for example, DCM=1) of the DCM in the payload of PPDU, and STBC word
Section is set to indicate that enabled (for example, STBC=1) of the STBC in the payload of PPDU.Due to the DCM in payload
It is enabled and STBC it is enabled be invalid scene, thus enabled state setting indicates that the DCM and STBC of payload are not made
Can, but rather indicate that the value in " GI+LTF size " field is used to indicate the new model of GI/HE-LTF combination.In this example, exist
When DCM=1 and STBC=1, " GI+LTF size "=3 indicate the GI of 4x LTF and 3.2 μ s not according to original definition, and
It is according to the GI for redefining expression 4x LTF and 0.8 μ s.In another example in DCM=1 and STBC=1, " GI+LTF size "
=0 can serve to indicate that the GI etc. of 1x LTF and 0.4 μ s.
Therefore, in 204, by using the mode that redefines (for example, GI of 4x LTF and 0.8 μ s), PPDU is generated
HE-LTF field.In 205, pass through wireless network transmissions PPDU in SU MIMO transmission.The application can be used for other
The transmission of appropriate type, for example, MU-MIMO transmission.
Fig. 3 depicts the PPDU for having " GI+LTF size " field redefined according to the parsing of the embodiment of the present application
Exemplary flow 300 flow chart.Process 300 can be executed by the associated component in receiver apparatus, for example, AP STA or
The non-AP STA of person.For example, received PPDU is generated from the PPDU referring to described in Fig. 2 and transmission process.In this example, false
If " GI+LTF size " field, DCM field and STBC field are assigned the identical instruction function described referring to Figures 1 and 2.
In 301, PPDU data packet is received at receiver.In 302, receiver detects in PPDU lead code
The DCM that DCM field is configured in the payload of instruction PPDU enables (for example, DCM=1) and STBC field is configured to
Indicate enabled (for example, the STBC=1) of the STBC in the payload of PPDU.In response, PPDU is resolved to DCM by receiver
It is not enabled with STBC.In 303, redefined according to " GI+LTF size " field, receiver also determines that the field is
It is no to be configured to virtual value.For example, in this example, in DCM=1 and STBC=1, only " GI+LTF size "=3 are effective
Value.In this way, in 304, if detecting that " GI+LTF size " field is not set to virtual value, declaring PPDU mistake.
In 305, if " GI+LTF size " field list is shown with valid value, receiver, especially channel estimator, by using again
The GI/HE-LTF mode of definition, for example, the GI of 4x LTF and 0.8 μ s, parse HE-LTF field.Payload data is solved
Analysis is that DCM and STBC is not enabled.
Process 200 and process 300 may be implemented as software logic, hardware logic, firmware logic or combinations thereof.
Fig. 4 is shown according to the embodiment of the present application for generating the PPDU with the GI/HE-LTF mode redefined
Example wireless communication device 400 configuration structural schematic diagram.Equipment 400 can be AP STA or non-AP STA, and can
PPDU is transferred to another equipment by Wireless LAN.Equipment 400 be configured as using GI duration for redefining and
HE-LTF size generates PPDU, and wherein the GI duration redefined and HE-LTF size cannot be individually by " GI+LTF
Size " field indicates.
Equipment 400 can be the calculating equipment or the network equipment of general purpose computer and any other type, including main process task
Device 430, memory 420 and be coupled to antenna 401-404 array transceiver 440.Transceiver 440 includes signal processor
410, various modules with transmission path, transmission path is used to generate each part or any other type of PPDU
Communications unit.For example, signal processor 410 include transmission first in first out (transmit First-In-First-Out,
TX FIFO) 411, encoder 412, scrambler 413, interleaver 414, constellation mapper 415, Inverse Discrete Fourier Transform device
(inversed discrete Fourier transformer, IDFT) 417 and GI and window are inserted into module 416.
Memory 420 is stored with PPDU format 4 21 comprising has " GI+HE-LTF size " field redefined
Format.PPDU generation module 422 is stored with processor-executable instruction, for according to PPDU format 4 21 generate data sequence and
The configuration of the other parts of PPDU.As described in specific in conjunction with Fig. 1 and Fig. 2, PPDU generation module 422 can be determined using again
The GI/HE-LTF mode of definition, and signal processor 410 correspondingly generates lead code and HE-LTF field.
Fig. 5 be show according to the embodiment of the present application for parse receive with the GI/HE-LTF mould redefined
The structural schematic diagram of the configuration of the example wireless communication device 500 of the PPDU of formula.Equipment 500 can be AP STA or non-AP
STA, and PPDU can be transferred to by another equipment by Wireless LAN.Equipment 500 is configured as continuing using the GI redefined
The combination of time and HE-LTF size parse the PPDU received, which cannot be individually by " GI+LTF size " field come table
Show.
Equipment 500 can be the calculating equipment or the network equipment of general purpose computer and any other type, including main process task
Device 530, memory 520 and be coupled to antenna 501-504 array transceiver 540.Transceiver 540 includes signal processor
510, the various modules with transmission path, transmission path is for handling PPDU or the communications list of any other type
Member.For example, signal processor 510 include receive first in first out (receive First-In-First-Out, RX FIFO) 511,
Synchronizer 512, channel estimator and balanced device (equalizer) 513, decoder 514, demapper 515, deinterleaver 516,
Fast Fourier transformer (fast Fourier transformer, FFT) 517 and descrambler 518.
Memory 520 is stored with PPDU format 521, and PPDU format 521 includes for redefining " GI+HE-LTF size "
The format of field.PPDU processing module 522 is stored with processor-executable instruction, for parsing PPDU according to PPDU format 521
Different piece (including lead code).As described in specific in conjunction with Fig. 1 and Fig. 3, as long as signal processor 510 detects DCM word
Section, STBC field indicate the GI/HE-LTF mode redefined together with " GI+HE-LTF size " field combination, then signal
Processor 510 correspondingly handles lead code and HE-LTF field based on the instruction from PPDU processing module 522.
It is understood that the signal processor in Fig. 4 and Fig. 5 may include it is known in the art it is of broad scope other
Appropriate component.Different components can be implemented with any appropriate ways known in the art, and hardware logic, software can be used
Logic or a combination thereof is implemented.In addition, in some embodiments, the transceiver 410 in Fig. 4 also may include as combined Fig. 5
In the RX path of transceiver 510 in component, and and vice versa.
Although this application discloses some preferred embodiments and method, according to disclosed above, to those skilled in the art
It is evident that can be deformed in the case where not departing from spirit and scope to these embodiments and methods
Or modification.The application is intended to the only content required by the regulation of applicable law and principle and appended claims and limits.
Claims (25)
1. a kind of wireless communications method, which is characterized in that this method comprises:
The first field of physical layer convergence protocol PLCP protocol Data Unit PPDU is set, to indicate selected efficient long training
Field HE-LTF mode；
According to first field:
The enabled of Shuangzi carrier modulation DCM on data field of the second field of the PPDU to indicate the PPDU is set；With
And
The enabled of space-time block coding STBC on the data field of the third field of the PPDU to indicate the PPDU is set,
Wherein second field of the PPDU is set to indicate that the DCM's is enabled；And
Transmit the PPDU.
2. method as described in claim 1, which is characterized in that the selected HE-LTF mode includes 4x HE-LTF mould
Formula is provided with first field and setting second field and with the third field first field is also indicated
Less than the protection interval GI of 3.2 μ s.
3. method as described in claim 2, which is characterized in that setting first field and be arranged second field and
The third field makes first field also indicate the protection interval of 0.8 μ s.
4. method as described in claim 1, which is characterized in that first field, second field and the third
Field is included in the HE-SIG-A field of the PPDU.
5. method as described in claim 1, which is characterized in that
It is arranged described in the obtained combinations of first field, second field and the third field neither indicate as multiple
The upper DCM of PPDU is enabled not to indicate that STBC is enabled yet.
6. method as described in claim 1, which is characterized in that the transmission is included in single user transmission described in transmission
PPDU。
7. a kind of wireless communications method, which is characterized in that this method comprises:
Receive physical layer convergence protocol PLCP protocol Data Unit PPDU；
In response to the reception, the first field instruction efficient long training field HE-LTF of 4x in the PPDU is determined；
In response to the reception, determine that the second field in the PPDU indicates Shuangzi carrier wave tune on the data field of the PPDU
DCM's processed is enabled；And
In response to the reception, block when the third field in the PPDU indicates the data field overhead of the PPDU is determined
The enabled of STBC is encoded, wherein second field of the PPDU indicates that the DCM's on the data field is enabled；And
The HE-LTF field of the PPDU is parsed by using the protection interval GI less than 3.2 μ s based on multiple determinations.
8. method as described in claim 7, which is characterized in that the parsing includes by using the protection for being equal to 0.8 μ s
Interval parses the PPDU.
9. method as described in claim 7, which is characterized in that further include:
It determines:
First field in the PPDU indicates non-4x HE-LTF mode；
Second field in the PPDU indicates that the DCM's on the data field of the PPDU is enabled；And
The third field in the PPDU indicates that the STBC's on the data field of the PPDU is enabled；And
Declare the mistake of the PPDU.
10. method as described in claim 7, which is characterized in that the parsing includes:
Based on the determination, the PPDU is resolved into DCM and STBC and is not applied to the PPDU.
11. a kind of wireless telecom equipment, for network transmission protocol data cell PPDU by wireless communication, which is characterized in that
The equipment includes:
Memory；
Processor is coupled to the memory；
Antenna；And
Transceiver, the transceiver include signal processor, and are coupled to the processor, the memory and the day
Line, the transceiver are used for:
The first field of physical layer convergence protocol PLCP protocol Data Unit PPDU is set, to indicate selected efficient long training
Field HE-LTF mode；
The enabled of Shuangzi carrier modulation DCM on data field of the second field of the PPDU to indicate the PPDU is set；
The enabled of space-time block coding STBC on the data field of the third field of the PPDU to indicate the PPDU is set,
Wherein second field of the PPDU is set to indicate that the DCM's is enabled；And
The PPDU is sent to the antenna, to transmit on the cordless communication network.
12. equipment as described in claim 11, which is characterized in that the selected HE-LTF mode includes 4x HE-LTF
Mode.
13. equipment as described in claim 11, which is characterized in that first field also indicates the protection less than 3.2 μ s
Interval.
14. equipment as described in claim 11, which is characterized in that first field also indicates the protection interval of 0.8 μ s.
15. equipment as described in claim 11, which is characterized in that first field, second field and described
Three fields are included in the lead code of the PPDU, and obtained first field, second word is arranged by multiple
The combination of section and the third field neither indicates that DCM is enabled nor indicates that STBC is enabled on the PPDU.
16. equipment as described in claim 11, which is characterized in that the PPDU is transmitted in single user transmission.
17. a kind of wireless telecom equipment receives protocol Data Unit PPDU for equipment by wireless communication, which is characterized in that
The equipment includes:
Memory；
Processor is coupled to the memory；And
Transceiver, including signal processor, and be used for:
Receive the physical layer convergence protocol PLCP protocol Data Unit PPDU for passing through wireless network transmissions；
In response to receiving the PPDU, the first field detected in the PPDU indicates selected efficient long training field HE-
LTF mode；
In response to receiving the PPDU, detects the second field in the PPDU and indicate that Shuangzi carries on the data field of the PPDU
Wave modulates the enabled of DCM；And
In response to receiving the PPDU, determine that the third field in the PPDU indicates the space-time block coding STBC's of the PPDU
It is enabled, wherein second field of the PPDU indicates that the DCM's on the data field is enabled；And
Based on first field, second field and the third field, by using the protection interval less than 3.2 μ s
GI parses the PPDU.
18. equipment as described in claim 17, which is characterized in that the transceiver is used for by using equal to 0.8 μ s's
Protection interval parses the PPDU.
19. equipment as described in claim 17, which is characterized in that selected HE LTF mode includes 4x HE LTF mould
Formula.
20. equipment as described in claim 17, which is characterized in that the transceiver is also used to determine:
First field in the PPDU indicates non-4x HE-LTF mode；
Second field in the PPDU indicates that the DCM's on the data field of the PPDU is enabled；And
The third field in the PPDU indicates that the STBC's on the data field of the PPDU is enabled, wherein institute
Second field for stating PPDU indicates that the DCM's on the data field is enabled；And
Based on first field, second field and the third field, the mistake of the PPDU is declared.
21. equipment as described in claim 17, which is characterized in that the transceiver is also used to, based on the determination, by institute
It states PPDU and resolves to the DCM and STBC on the data field and be not enabled.
22. a kind of wireless communications method, which is characterized in that this method comprises:
Receive physical layer convergence protocol PLCP protocol Data Unit PPDU；
Determine that the Shuangzi carrier modulation DCM field in the received PPDU indicates the DCM's on the data field of the PPDU
It is enabled, and determine that the space-time block coding STBC field in the received PPDU indicates on the data field of the PPDU
STBC it is enabled；
Determine whether the protection interval in the received PPDU+long training field GI+LTF size field is configured to effective
Value；And
If the GI+LTF size field in the PPDU is configured to virtual value, by using the GI that redefines and
LTF mode parses the efficient long training field HE-LTF field of the PPDU.
23. the method as described in claim 22, which is characterized in that the virtual value indicates the GI+LTF size field
Value is 3.
24. the method as described in claim 23, which is characterized in that the big small mode instruction of the GI redefined and LTF
The GI of 4x HE-LTF mode and 0.8 μ s.
25. the method as described in claim 22, which is characterized in that if it is determined that the GI+ in the received PPDU
LTF size field is configured to insignificant values, then declares the mistake of the PPDU.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| US15/794,981 | 2017-10-26 | ||
| US15/794,981 US10979178B2 (en) | 2016-11-04 | 2017-10-26 | Mechanism for short guard interval indication in high efficiency WLAN |
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| CN110035457A true CN110035457A (en) | 2019-07-19 |
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| CN201811234760.3A Withdrawn CN110035457A (en) | 2017-10-26 | 2018-10-23 | Wireless communications method and its equipment |
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| TWI692954B (en) | 2020-05-01 |
| TW201918042A (en) | 2019-05-01 |
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