CN108306713A - A kind of information transferring method and device of wireless communication system - Google Patents
A kind of information transferring method and device of wireless communication system Download PDFInfo
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- CN108306713A CN108306713A CN201810054250.1A CN201810054250A CN108306713A CN 108306713 A CN108306713 A CN 108306713A CN 201810054250 A CN201810054250 A CN 201810054250A CN 108306713 A CN108306713 A CN 108306713A
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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
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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Abstract
The present invention provides a kind of information transferring method of wireless communication system and device, this method includes：Obtain initial modulation and coding strategy MCS index values used by present channel transmission data；The transmission mode of control information and data information is selected according to the initial MCS index values, and the transmission to the control information and data information is realized using selected transmission mode.The present invention can be adaptive the initial MCS index values according to current channel condition, to reach the reliability for improving information transmission, promote the target of utilization rate of air interface resource to select the sending mode of control information and data information.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to the information transferring methods and dress of a kind of wireless communication system
It sets.
Background technology
Currently, main wireless communication system standard, including WLAN (WirelessLocal Area in the world
NetWork, WLAN) system, LTE (Long Term Evolution, long term evolution) system, WiMAX (Worldwide
Interoperability for Microwave Access, worldwide interoperability for microwave accesses) system, WCDMA (Wideband
Code Division Multiple Access, wideband code division multiple access) system and TD-SCDMA (Time Division-
Synchronous Code Division Multiple Access, TD SDMA) system etc., based on above-mentioned each
The various wireless communication network of kind standard, has been widely applied in the every field of our production and living, such as mobile communication, nothing
Line local area network communication, wireless network passback etc., routine work with live in bring to us it is many convenient, and in order to
The utilization rate of air interface resource of wireless transmission is improved, the whole network handling capacity is promoted, the wireless network of various standards has been all made of centainly
Link adaptation techniques, including according to link condition, change frame aggregation degree, modulation coding scheme etc., with according to present channel
Environment, dynamic adjust the methods of Radio Link transmission data, reach the maximization of resource utilization.
By development and application for many years, WLAN technologies are highly developed.The price of WLAN chips is very low, WLAN at
For one of current most common broadband access technology.802.11 WLAN standards of IEEE (WLAN) use CSMA/CA
(Carrier Sense Multiple Access with Collision Avoidance, csma/conflict
Prevent) multiple access protocol, but CSMA/CA agreements are mainly vied each other by each access node for the access of multi-user
Mode carried out wireless communication to obtain interface-free resources, and resource overhead when competing is larger, causes whole resource utilization
Relatively low, transmission Mean Speed declines more compared with the Theoretical Rate eated dishes without rice or wine.
In traditional wireless communication system, MAC layer uses frame aggregation and block confirmation technology, to promote MAC layer
Performance, wherein techniques of frame aggregation are to improve to propose for MAC layer in 802.11n standards, by multiple data polymerization
To data incline it is inner be transmitted, reduce unnecessary overhead, the whole efficiency for making MAC layer and eating dishes without rice or wine is carried
It rises.802.11 standards are after repeatedly revising, and physical layer can reach very high rate, but there is no notable for throughput of system
Raising, the mainly not substantive promotion of the efficiency of MAC layer.Main reason is that data frame passes through media access controller
When MAC layer and physical interface transceiver PHY layer, add various prefixes, include MAC header, PHY, all types of interframe spaces,
The expenses such as acknowledgement frame cause invalid expense excessive.At standard formulation initial stage, people just have appreciated that aggregation strategy can improve
Efficiency of transmission just proposes frame aggregation mechanism when IEEE802.11n.By the way that the identical data frame aggregation of destination address is arrived
It is transmitted in one data frame, so reducing unnecessary repetition expense, shortens the stand-by period that expense is brought.
IEEE802.11n defines two kinds of polymerization methods：One kind being referred to as service data unit polymerization methods, and another kind is protocol data
Unit polymerization methods, it is first right when upper layer hands down MSDU (MAC Service Data Unit, MAC Service Data Unit)
MSDU is polymerize to obtain A-MSDU (Aggregate MAC Service Data Unit polymerize MAC Service Data Unit),
It can be seen that A-MSDU is located at the top of MAC layer.It obtains using queue processing, assignment, fragment and adding after polymerization MSDU
After adding the prefixes such as MAC header and CRC, data are just transmitted to MAC layer bottom end to form A-MPDU (Aggregate MAC
Protocol Data Unit, aggregation protocol data cell).A-MPDU is transmitted to physical layer addition PHY and forms PSDU
(presentation Service Data Unit, PSDU presentation service data unit), by physical layer process then with frequency
Mode is sent.
Polymerization MSDU is expressed as A-MSDU.In A-MSDU mechanism, the MAC service data sheet that gets off from upper layer transport
Member is cumulatively added and is put into a Medium Access Control (MAC) Protocol Data Unit.Compared with A-MSDU, A-MPDU flowcollector aggregation scheme FlowCollectors are a difference in that
MPDU is in MAC layer bottom end in logic, and PSDU is obtained after polymerization and continues to be transmitted to physical layer.
In standard WiFi systems, block confirmation request BAR frames, block confirm the effect block affirmation mechanism of the control frames such as BA frames,
Refer to that need to reply block acknowledgement frame to sending device, wherein the BA when receiving device receives the PPDU using A-MPDU structures
Include the domain block acknowledgement bit table (i.e. BABitmap) in frame, whether all need to feed back of every correspondence in the domains BABitmap is correctly connect
One in the MPDU of receipts.Due to block confirmation request frame, importance of block acknowledgement frame during data frame transfer confirms, the frame
Requirement higher for transmission reliability all can be because to all MPDU of entire link if there is the error of transmission of BAR and BA frames
It causes to retransmit not receive confirmation message, has large effect to MAC layer and the efficiency eated dishes without rice or wine.
Invention content
In view of the above problems, it is proposed that the present invention overcoming the above problem in order to provide one kind or solves at least partly
State the information transferring method and device of the wireless communication system of problem.
One aspect of the present invention provides a kind of information transferring method of wireless communication system, including：
Obtain initial modulation and coding strategy MCS index values used by present channel transmission data information；
The transmission mode of control information and data information is selected according to the initial MCS index values, and using selected
Transmission mode realizes the transmission to the control information and data information.
Optionally, described that the transmission mode of control information and data information is selected according to the initial MCS index values, and adopt
Include to the transmission of the control information and data information with the realization of selected transmission mode：
By the initial MCS index values and preset first threshold MCSth1With preset second threshold MCSth2Compared
Compared with, wherein MCSth1Less than MCSth2；
If the initial MCS index values are less than or equal to the MCSth1, then by the data information and the first predetermined number
Control information polymerize, to after polymerization the data information and control information be transmitted.
Optionally, described that the transmission mode of control information and data information is selected according to the initial MCS index values, and adopt
Further include to the transmission of the control information and data information with the realization of selected transmission mode：
If the initial MCS index values are more than the MCSth1, and the initial MCS index values are less than or equal to described
MCSth2, then compare the first time interval resource occupancy T1 and the second time interval resource occupancy T2, when the T1 is more than the T2,
The data information is polymerize with the control information of the second predetermined number, to the data information and control letter after polymerization
Breath is transmitted；When the T1 is less than or equal to the T2, then the control information and the data information are respectively adopted
Preset MCS index values, the initial MCS index values are transmitted respectively, wherein the preset MCS index values be less than or
Equal to the initial MCS index values；
Wherein, the T1 is the time slot money when control information and data information is transmitted under the mode not polymerizeing
Source occupancy, when the T2 is that the control information and data information of second predetermined number is transmitted under the mode of polymerization
Time interval resource occupancy.
Optionally, described that the transmission mode of control information and data information is selected according to the initial MCS index values, and adopt
Further include to the transmission of the control information and data information with the realization of selected transmission mode：
If the initial MCS index values are more than the MCSth2, then compare T1 and third time interval resource occupancy T3, work as institute
When stating T1 more than the T3, the data information is polymerize with the control information of third predetermined number, to the institute after polymerization
It states data information and control information is transmitted；When the T1 is less than or equal to the T3, then to the control information and institute
State that preset MCS index values are respectively adopted in data information, the initial MCS index values are transmitted respectively, wherein described default
MCS index values be less than or equal to the initial MCS index values；
Wherein, the T3 is that the control information and data information of the third predetermined number is passed under the mode of polymerization
Time interval resource occupancy when defeated.
Optionally, it before the initial MCS index values used by the acquisition present channel transmission data information, also wraps
It includes：
Control information and data information whether is existed simultaneously in the current data information to be sent of monitoring.
One aspect of the present invention provides a kind of information transferring method of wireless communication system, including：
Acquisition module is suitable for initial modulation used by obtaining present channel transmission data information and coding strategy MCS
Index value；
Transmission module is suitable for selecting the transmission mode of control information and data information according to the initial MCS index values,
And the transmission to the control information and data information is realized using selected transmission mode.
Optionally, the transmission module, including：
Comparison sub-module is suitable for the initial MCS index values and preset first threshold MCSth1With preset second
Threshold value MCSth2It is compared, wherein MCSth1Less than MCSth2；
First transmission submodule is suitable for being less than or equal to the MCS when the initial MCS index valuesth1When, it will be described
Data information is polymerize with the control information of the first predetermined number, is carried out with control information to the data information after polymerization
Transmission.
Optionally, the transmission module further includes：
Second transmission submodule is suitable for being more than the MCS when the initial MCS index valuesth1, and the initial MCS ropes
Draw value and is less than or equal to the MCSth2When, compare the first time interval resource occupancy T1 and the second time interval resource occupancy T2, works as institute
When stating T1 more than the T2, the data information is polymerize with the control information of the second predetermined number, to the institute after polymerization
It states data information and control information is transmitted；When the T1 is less than or equal to the T2, then to the control information and institute
State that preset MCS index values are respectively adopted in data information, the initial MCS index values are transmitted respectively, wherein described default
MCS index values be less than or equal to the initial MCS index values；
Wherein, the T1 is the time slot money when control information and data information is transmitted under the mode not polymerizeing
Source occupancy, when the T2 is that the control information and data information of second predetermined number is transmitted under the mode of polymerization
Time interval resource occupancy.
Optionally, the transmission module further includes：
Third transmits submodule, is suitable for being more than the MCS when the initial MCS index valuesth2When, compare T1 and third
Time interval resource occupancy T3, when the T1 is more than the T3, by the control information of the data information and third predetermined number
It is polymerize, the data information after polymerization is transmitted with control information；When the T1 is less than or equal to the T3,
Preset MCS index values then are respectively adopted to the control information and the data information, the initial MCS index values divide
Supplementary biography is defeated, wherein the preset MCS index values are less than or equal to the initial MCS index values；
Wherein, the T3 is that the control information and data information of the third predetermined number is passed under the mode of polymerization
Time interval resource occupancy when defeated.
Wherein, described device further includes：
Monitoring modular, initial MCS used by being suitable for obtaining present channel transmission data information in the acquisition module
Before index value, monitor in current data information to be sent whether exist simultaneously control information and data information；
The acquisition module, it is particularly applicable to work as monitoring modular in current data information to be sent while monitoring to control
When information and data information, the operation of initial MCS index values used by obtaining present channel transmission data information is executed.
The information transferring method and device of wireless communication system provided in an embodiment of the present invention, exist according to current channel condition
Used initial MCS index values determine the channel status of present channel environment when transmission data information, further according to channel
State selects the sending mode of control information and data information, reduces the resource overhead of MAC layer, improves air-interface efficiency,
The transmission reliability for also ensureing control information simultaneously, improves the overall throughput performance of network.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, below the special specific implementation mode for lifting the present invention.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is a kind of flow chart of the information transferring method of wireless communication system of the embodiment of the present invention；
When Fig. 2 is channel status difference in the embodiment of the present invention, the polymerization schematic diagram of control frame and data frame；
When Fig. 3 is that channel status is general in the embodiment of the present invention, the polymerization schematic diagram of control frame and data frame；
Fig. 4 is the data transmission format signal using control frame when not polymerization methods and data frame in the embodiment of the present invention
Figure；
When Fig. 5 is that channel status is good in the embodiment of the present invention, the polymerization schematic diagram of control frame and data frame；
Fig. 6 is a kind of structural schematic diagram of the information carrying means of wireless communication system of the embodiment of the present invention.
Specific implementation mode
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific terminology), there is meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless by specific definitions, otherwise will not be explained with the meaning of idealization or too formal.
In standard WiFi systems, block confirmation request BAR frames, block confirm the effect of the control frames such as BA frames, are to realize that block is true
Recognize mechanism, block affirmation mechanism refers to that need to be replied to sending device when receiving device receives the PPDU using A-MPDU structures
Block acknowledgement frame, wherein include block acknowledgement bit table (English in the BA frames：BA Bitmap) domain, every in the domains BA Bitmap is right
It all should need to feed back one in the MPDU whether being correctly received.Since block confirmation request frame, block acknowledgement frame are passed in data frame
Importance during defeated confirmation, requirement higher of the frame for transmission reliability, if there is the error of transmission of BAR and BA frames,
All MPDU of entire link can be caused to retransmit because of confirmation message is not received, had to MAC layer and the efficiency eated dishes without rice or wine
Large effect.
For this purpose, the standard method of WiFi, is to be polymerize BAR or BA frames, aggregate frame together with the data frame of the STA
As an independent data packet, can only be sent using identical MCS.Aggregate frame uses identical modulation coding scheme MCS
It is sent, this method can effectively reduce interframe space, promote the efficiency of MAC layer.But since BAR frames or BA frames are as control
Frame, to the reliability requirement higher of transmission, if the MCS according to data frame is sent, in order to ensure the efficiency of data frame transmission,
MCS selections are higher, will certainly reduce the transmission accuracy of control frame, cause the error rate of BAR or BA frames to be promoted, according to minimum
MCS ensure the transmission accuracy of BAR or BA frames, the MCS of data frame part is equally very low, has to the transmission rate of data
Large effect.
Standard method also provides a kind of method, be by the control frame of this type of BAR or BA frames, not with data frame aggregation, in
Between separation standard interframe space SIFS, control frame and data frame be respectively adopted itself most suitable MCS and sent, but this
Mode can cause certain time interval resource to waste.
In order to avoid the above situation generates, while ensureing control frame transmission reliability, data portion will not be influenced
The information transferring method of transmission rate, wireless communication system provided in an embodiment of the present invention is that one kind can be according to channel condition certainly
The method for adapting to the transmission mode of selection transmission control information and data information is carried with reaching the reliability for improving information transmission
Rise the target of utilization rate of air interface resource.
Fig. 1 diagrammatically illustrates the flow chart of the information transferring method of the wireless communication system of one embodiment of the invention.
The information transferring method of wireless communication system provided in this embodiment is suitable for access point apparatus AP or terminal device RT is executed.
Referring to Fig.1, the information transferring method of the wireless communication system of the embodiment of the present invention specifically includes following steps：
S11, initial modulation and coding strategy MCS index values used by present channel transmission data information are obtained.
In a wireless communication system, whether monitoring AP RT terminals currently exist simultaneously control in data information to be sent
Information and data information, if monitoring, AP RT terminals need transmission data frame and control frame simultaneously, obtain currently transmitted
Initial MCS index values used by data information, for subsequently according to the initial adaptively selected transmission control letter of MCS index values
The transmission mode of breath and data information.
S12, the transmission mode that control information and data information is selected according to the initial MCS index values, and selected by use
The transmission mode selected realizes the transmission to the control information and data information.
In the embodiment of the present invention, the channel status of channel circumstance is divided into poor, general and good three grades, these three
It is used when grade needs data frame currently transmitted according to access point apparatus AP in wireless communication system or terminal device RT
Initial MCS index values size determines.Wherein, the tool of the channel status of present channel environment is determined according to initial MCS index values
Body realization method is as follows：By the initial MCS index values and preset first threshold MCSth1With preset second threshold MCSth2
It is compared, wherein MCSth1Less than MCSth2；If the initial MCS index values are less than or equal to the MCSth1, it is determined that when
The channel status of preceding channel circumstance is poor；If the initial MCS index values are more than the MCSth1, and the initial MCS index values are small
In or equal to the MCSth2, it is determined that the channel status of present channel environment is general；If the initial MCS index values are more than institute
State MCSth2, it is determined that the channel status of present channel environment is good.
Wherein, MCSth1And MCSth2It can be set according to the practical application scene of wireless communication system, to this present invention
It is not specifically limited.
It is intelligible, it can also be according to the demand of the practical application scene of wireless communication system, by the way that more thresholds are arranged
The channel status of channel circumstance is divided into multiple grades, and then realizes more accurately information transmission and control by value.
Transmission mode in the embodiment of the present invention includes aggregation transfer pattern and not aggregation transfer pattern.Wherein, it does not polymerize
Transmission mode refers to is respectively adopted preset MCS index values, the initial MCS ropes to the control information and the data information
Draw value to be transmitted respectively, wherein the preset MCS index values are less than or equal to the initial MCS index values.It specifically can be with
Using minimum MCS index values, i.e. MCS0 is transmitted the control information.Aggregation transfer pattern refer to by data information with
The control information of predetermined number is polymerize, and is transmitted with control information to the data information after polymerization.
In the embodiment of the present invention, step S12 specifically includes following several realization situations：
If the initial MCS index values are less than or equal to the MCSth1, then by the data information and the first predetermined number
Control information polymerize, to after polymerization the data information and control information be transmitted.
In practical applications, if initial MCS index values<=MCSth1, it is believed that channel condition is poor, and MCS chooses relatively low
, it is polymerize at this time, the first predetermined number could be provided as 1, i.e., only needs to send a control frame according to current MCS, and
Complete data packet is formed with data frame aggregation to be sent, at this time the polymerization schematic diagram of control frame and data frame, referring to Fig. 2.
If the initial MCS index values are more than the MCSth1, and the initial MCS index values are less than or equal to described
MCSth2, then compare the first time interval resource occupancy T1 and the second time interval resource occupancy T2, when the T1 is more than the T2,
The data information is polymerize with the control information of the second predetermined number, to the data information and control letter after polymerization
Breath is transmitted；When the T1 is less than or equal to the T2, then the control information and the data information are respectively adopted
Preset MCS index values, the initial MCS index values are transmitted respectively, wherein the preset MCS index values be less than or
Equal to the initial MCS index values.Wherein, the T1 is that the control information and data information carries out under the mode not polymerizeing
Time interval resource occupancy when transmission, the T2 are the control information and data information of second predetermined number in the side of polymerization
Time interval resource occupancy when being transmitted under formula.
In practical applications, if MCSth1<Initial MCS index values<=MCSth2, it is believed that channel condition is fine, carries out at this time
Polymerization, the second predetermined number could be provided as 2, i.e., only need to repeat to send control frame twice according to initial MCS index values, and will
Two control frames form complete data packet with data frame aggregation and are sent, at this time the polymerization schematic diagram of control frame and data frame,
Referring to Fig. 3；It should be noted that due to repeating transmission control frame, the reduction of MAC layer resource utilization is equally caused, is needed at this time
It is compared with the mode not polymerizeing, wherein the data format of control frame and data frame is as shown in figure 4, specific comparison when not polymerizeing
Mode is as follows：If under the mode that control frame and data frame do not polymerize, it is T1 that time interval resource, which occupies, wherein：
T1=control frames bit number/MCS0 (in the case of MCS0)+SIFS；
Wherein SIFS standard interframe spaces between frame and data frame in order to control.
If control frame and data frame aggregation, and control frame uses 2 times of repetition sending method, then the time slot in the case of polymerizeing
Resource occupation is T2, wherein：
T2=2* control frames bit number/initial MCS (in the case of initial MCS)：
If T1>T2, then using the pattern transmission control frame and data frame of polymerization, if T1<=T2, then using the side not polymerizeing
Formula transmission control frame and data frame.
If the initial MCS index values are more than the MCSth2, then compare T1 and third time interval resource occupancy T3, work as institute
When stating T1 more than the T3, the data information is polymerize with the control information of third predetermined number, to the institute after polymerization
It states data information and control information is transmitted；When the T1 is less than or equal to the T3, then to the control information and institute
State that preset MCS index values are respectively adopted in data information, the initial MCS index values are transmitted respectively, wherein described default
MCS index values be less than or equal to the initial MCS index values.Wherein, the T3 is that the control of the third predetermined number is believed
Time interval resource occupancy when breath and data information are transmitted under the mode of polymerization.
In practical applications, if MCSth2<Initial MCS index values, it is believed that channel condition is good, and initial MCS index values are chosen
It is higher, it is polymerize at this time, third predetermined number could be provided as 3, i.e., only needs to repeat to send 3 secondary controls according to current MCS
Frame processed, the polymerization schematic diagram of control frame and data frame, forms referring to Fig. 5, and by continuous three control frame with data frame aggregation at this time
Complete data packet is sent；It should be noted that due to repeating transmission control frame, MAC layer resource utilization is equally caused to drop
It is low, it needs to be compared with the mode not polymerizeing at this time, way of contrast is as follows：If the mode that control frame and data frame do not polymerize
Under, it is T1 that time interval resource, which occupies, wherein：
T1=control frames bit number/MCS0 (in the case of MCS0)+SIFS；
Wherein SIFS standard interframe spaces between frame and data frame in order to control.
If control frame and data frame aggregation, and control frame uses 3 times of repetition sending method, then the time slot in the case of polymerizeing
Resource occupation is T3, wherein：
T3=3* control frames bit number/MCS (in the case of MCS)；
If T1>T3, then using the pattern transmission control frame and data frame of polymerization, if T1<=T3, then using the side not polymerizeing
Formula transmission control frame and data frame.
Finally, according to the pattern of selected transmission control frame and data frame, the group package operation of MPDU is carried out, and will complete
Packet be sent to physical layer.
Further, when the mode that selection does not polymerize is transmitted the control information and data information, specifically may be used
With using minimum MCS index values, i.e. MCS0 is transmitted the control information.
In practical application, the communication based on the communication equipment of WiFi Standard MAC layer agreements, or based on TDMA standards is set
It is standby, in order to improve the resource utilization of MAC layer, it will usually use the technology of frame aggregation, including A-MSDU's and A-MPDU is poly-
It closes, while in order to reduce interframe space expense, some control frames, such as BAR/BA frames can also be gathered together with data frame
It closes, promotes the resource efficiency of MAC.But the requirement higher due to control frame to reliability, if with after data frame aggregation, it is necessary to number
According to the identical MCS modulation coding schemes of frame, the reliability requirement of control frame is influenced.The embodiment of the present invention is obtained according to current MCS
It wins the confidence link circuit condition, and selects the sending mode of data frame and control frame according to channel link situation, MAC is reduced to reach
Layer expense, promotes air-interface efficiency, ensures the transmission reliability purpose of control frame.
In the embodiment of the present invention, AP or RT terminals when sending data, need together if occurring data frame and control frame
When transmission, then AP nodes or RT terminal nodes, can dynamically judge control according to the selected MCS of present channel environment
Frame and data frame are sent using which kind of pattern, if channel condition is general or good, the efficiency of control frame and data frame aggregation,
Higher than the efficiency that control frame and data frame do not polymerize, while control frame carries out transmission repeatedly, multiple identical control frame
Content is polymerize with data frame, and the MPDU for forming completion is sent, to avoid due to using control frame caused by higher MCS
Higher transmitted error rate ensures the transmission reliability of control frame.In addition to the resource efficiency of MAC layer is ensured, if due to weight
The multiple time interval resource expense for repeatedly sending control and bringing, the money of time slot when polymerizeing is not done more than transmission control frame respectively and data frame
Source expense, then no longer polymerize, and is changed to send the pattern that control frame and data frame are sent respectively, control frame
MCS chooses minimum MCS0, and while ensureing transmission reliability, it is excessive also to avoid repeatedly sending the time interval resource expense brought,
The problem of reducing the resource utilization of MAC layer.
For embodiment of the method, for simple description, therefore it is all expressed as a series of combination of actions, but this field
Technical staff should know that the embodiment of the present invention is not limited by the described action sequence, because implementing according to the present invention
Example, certain steps can be performed in other orders or simultaneously.Next, those skilled in the art should also know that, specification
Described in embodiment belong to preferred embodiment, necessary to the involved action not necessarily embodiment of the present invention.
Fig. 6 diagrammatically illustrates the structural representation of the information carrying means of the wireless communication system of one embodiment of the invention
Figure.The information carrying means of wireless communication system provided in this embodiment can be configured in access point apparatus AP or terminal is set
Standby RT.With reference to Fig. 6, the information carrying means of the wireless communication system of the embodiment of the present invention specifically include acquisition module 201 and
Transmission module 202, wherein：
The acquisition module 201, is suitable for initial modulation used by obtaining present channel transmission data information and compiles
Code strategy MCS index values；
The transmission module 202 is suitable for selecting control information and data information according to the initial MCS index values
Transmission mode, and the transmission to the control information and data information is realized using selected transmission mode.
In embodiments of the present invention, transmission module 202 specifically include comparison sub-module and the first transmission submodule, described
Comparison sub-module, be suitable for the initial MCS index values and preset first threshold MCSth1With preset second threshold
MCSth2It is compared, wherein MCSth1Less than MCSth2.Specifically, described in being less than or equal to when the initial MCS index values
MCSth1When, determine that the channel status of present channel environment is poor；When the initial MCS index values are more than the MCSth1, and it is described
Initial MCS index values are less than or equal to the MCSth2When, determine that the channel status of present channel environment is general；When described initial
MCS index values are more than the MCSth2When, determine that the channel status of present channel environment is good.
Transmission mode in the embodiment of the present invention includes aggregation transfer pattern and not aggregation transfer pattern.Wherein, it does not polymerize
Transmission mode refers to is respectively adopted preset MCS index values, the initial MCS ropes to the control information and the data information
Draw value to be transmitted respectively, wherein the preset MCS index values are less than or equal to the initial MCS index values.It specifically can be with
Using minimum MCS index values, i.e. MCS0 is transmitted the control information.Aggregation transfer pattern refer to by data information with
The control information of predetermined number is polymerize, and is transmitted with control information to the data information after polymerization.
The first transmission submodule, is suitable for being less than or equal to the MCS when the initial MCS index valuesth1When,
The data information is polymerize with the control information of the first predetermined number, to the data information and control letter after polymerization
Breath is transmitted.
In a specific embodiment, transmission module 202 further include specifically：
Second transmission submodule is suitable for being more than the MCS when the initial MCS index valuesth1, and the initial MCS ropes
Draw value and is less than or equal to the MCSth2When, compare the first time interval resource occupancy T1 and the second time interval resource occupancy T2, works as institute
When stating T1 more than the T2, the data information is polymerize with the control information of the second predetermined number, to the institute after polymerization
It states data information and control information is transmitted；When the T1 is less than or equal to the T2, then to the control information and institute
State that preset MCS index values are respectively adopted in data information, the initial MCS index values are transmitted respectively, wherein described default
MCS index values be less than or equal to the initial MCS index values.Wherein, the T1 is that the control information and data information exists
Time interval resource occupancy when being transmitted under the mode not polymerizeing, the T2 be second predetermined number control information and
Time interval resource occupancy when data information is transmitted under the mode of polymerization.
In a specific embodiment, transmission module 202 further include specifically：
Third transmits submodule, is suitable for being more than the MCS when the initial MCS index valuesth2When, compare T1 and third
Time interval resource occupancy T3, when the T1 is more than the T3, by the control information of the data information and third predetermined number
It is polymerize, the data information after polymerization is transmitted with control information；When the T1 is less than or equal to the T3,
Preset MCS index values then are respectively adopted to the control information and the data information, the initial MCS index values divide
Supplementary biography is defeated, wherein the preset MCS index values are less than or equal to the initial MCS index values.Wherein, the T3 is described
Time interval resource occupancy when the control information and data information of third predetermined number is transmitted under the mode of polymerization.
Further, when the mode that selection does not polymerize is transmitted the control information and data information, specifically may be used
With using minimum MCS index values, i.e. MCS0 is transmitted the control information.
In embodiments of the present invention, described device further includes attached monitoring modular not shown in the figure, which is applicable in
Before the initial MCS index values used by obtaining present channel transmission data information in acquisition module 201, monitoring is current pending
It send and whether exists simultaneously control information and data information in data information；
The acquisition module 201, it is particularly applicable to work as monitoring modular in current data information to be sent while monitoring
When control information and data information, the operation of initial MCS index values used by obtaining present channel transmission data information is executed.
For device embodiments, since it is basically similar to the method embodiment, so fairly simple, the correlation of description
Place illustrates referring to the part of embodiment of the method.
The apparatus embodiments described above are merely exemplary, wherein the unit illustrated as separating component can
It is physically separated with being or may not be, the component shown as unit may or may not be physics list
Member, you can be located at a place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of module achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case of, you can to understand and implement.
Compared with prior art, the information transferring method of wireless communication system provided in an embodiment of the present invention and device have
Following advantages and beneficial effects：
The information transferring method and device of wireless communication system provided in an embodiment of the present invention, can current channel condition exist
Used initial MCS index values determine the channel status of present channel environment when transmission data information, further according to channel
State selects the sending mode of control information and data information, reduces the resource overhead of MAC layer, improves air-interface efficiency,
The transmission reliability for also ensureing control information simultaneously, improves the overall throughput performance of network.
In embodiments of the present invention, it should be understood that disclosed device and method, it can be real by another way
It is existing.For example, apparatus embodiments described above are merely indicative, for example, the division of the unit or unit, only
A kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, equipment or unit
It connects, can be electrical or other forms.
Each functional unit in embodiments of the present invention can be integrated in a processing unit or each unit also may be used
To be independent physical module.If the integrated unit is realized in the form of SFU software functional unit and as independent production
Product are sold or in use, can be stored in a computer read/write memory medium.Based on this understanding, the present invention is implemented
The all or part of the technical solution of example can be expressed in the form of software products, which is stored in one
In a storage medium, including some instructions are used so that a computer equipment, such as can be personal computers, server,
Or network equipment etc. or processor (processor) execute all or part of step of each embodiment the method for the present invention
Suddenly.And storage medium above-mentioned includes：General serial bus USB (Universal Serial Bus flash drive),
Mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access
Memory, RAM), the various media that can store program code such as magnetic disc or CD.
It will be appreciated by those of skill in the art that although some embodiments in this include included in other embodiments
Certain features rather than other feature, but the combination of the feature of different embodiments means to be within the scope of the present invention simultaneously
And form different embodiments.For example, in the following claims, the one of arbitrary of embodiment claimed all may be used
It is used in a manner of in any combination.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of information transferring method of wireless communication system, which is characterized in that including：
Obtain initial modulation and coding strategy MCS index values used by present channel transmission data information；
The transmission mode of control information and data information is selected according to the initial MCS index values, and uses selected transmission
Pattern realizes the transmission to the control information and data information.
2. according to the method described in claim 1, it is characterized in that, described according to the initial MCS index values selection control letter
The transmission mode of breath and data information, and the biography to the control information and data information is realized using selected transmission mode
It is defeated to include：
By the initial MCS index values and preset first threshold MCSth1With preset second threshold MCSth2It is compared,
In, MCSth1Less than MCSth2；
If the initial MCS index values are less than or equal to the MCSth1, then by the control of the data information and the first predetermined number
Information processed is polymerize, and is transmitted with control information to the data information after polymerization.
3. according to the method described in claim 2, it is characterized in that, described according to the initial MCS index values selection control letter
The transmission mode of breath and data information, and the biography to the control information and data information is realized using selected transmission mode
It is defeated to further include：
If the initial MCS index values are more than the MCSth1, and the initial MCS index values are less than or equal to the MCSth2,
Then compare the first time interval resource occupancy T1 and the second time interval resource occupancy T2, it, will be described when the T1 is more than the T2
Data information is polymerize with the control information of the second predetermined number, is carried out with control information to the data information after polymerization
Transmission；When the T1 is less than or equal to the T2, then the control information and the data information are respectively adopted preset
MCS index values, the initial MCS index values are transmitted respectively, wherein the preset MCS index values are less than or equal to institute
State initial MCS index values；
Wherein, the T1 is that the time interval resource when control information and data information is transmitted under the mode not polymerizeing accounts for
Dosage, the T2 be the control information and data information of second predetermined number when being transmitted under the mode of polymerization when
Gap resource occupation amount.
4. according to the method described in claim 2, it is characterized in that, described according to the initial MCS index values selection control letter
The transmission mode of breath and data information, and the biography to the control information and data information is realized using selected transmission mode
It is defeated to further include：
If the initial MCS index values are more than the MCSth2, then compare T1 and third time interval resource occupancy T3, as the T1
When more than the T3, the data information is polymerize with the control information of third predetermined number, to the number after polymerization
It is believed that breath and control information are transmitted；When the T1 is less than or equal to the T3, then to the control information and the number
It is believed that preset MCS index values are respectively adopted in breath, the initial MCS index values are transmitted respectively, wherein described preset
MCS index values are less than or equal to the initial MCS index values；
Wherein, when the T3 is transmitted for the control information and data information of the third predetermined number under the mode of polymerization
Time interval resource occupancy.
5. according to the method described in claim 1, it is characterized in that, being used in the acquisition present channel transmission data information
Initial MCS index values before, further include：
Control information and data information whether is existed simultaneously in the current data information to be sent of monitoring.
6. a kind of information carrying means of wireless communication system, which is characterized in that including：
Acquisition module is suitable for initial modulation used by obtaining present channel transmission data information and coding strategy MCS indexes
Value；
Transmission module is suitable for selecting the transmission mode of control information and data information according to the initial MCS index values, and adopts
The transmission to the control information and data information is realized with selected transmission mode.
7. device according to claim 6, which is characterized in that the transmission module, including：
Comparison sub-module is suitable for the initial MCS index values and preset first threshold MCSth1With preset second threshold
MCSth2It is compared, wherein MCSth1Less than MCSth2；
First transmission submodule is suitable for being less than or equal to the MCS when the initial MCS index valuesth1When, by the data
Information is polymerize with the control information of the first predetermined number, is passed with control information to the data information after polymerization
It is defeated.
8. device according to claim 7, which is characterized in that the transmission module further includes：
Second transmission submodule is suitable for being more than the MCS when the initial MCS index valuesth1, and the initial MCS index values
Less than or equal to the MCSth2When, compare the first time interval resource occupancy T1 and the second time interval resource occupancy T2, as the T1
When more than the T2, the data information is polymerize with the control information of the second predetermined number, to the number after polymerization
It is believed that breath and control information are transmitted；When the T1 is less than or equal to the T2, then to the control information and the number
It is believed that preset MCS index values are respectively adopted in breath, the initial MCS index values are transmitted respectively, wherein described preset
MCS index values are less than or equal to the initial MCS index values；
Wherein, the T1 is that the time interval resource when control information and data information is transmitted under the mode not polymerizeing accounts for
Dosage, the T2 be the control information and data information of second predetermined number when being transmitted under the mode of polymerization when
Gap resource occupation amount.
9. device according to claim 7, which is characterized in that the transmission module further includes：
Third transmits submodule, is suitable for being more than the MCS when the initial MCS index valuesth2When, compare T1 and third time slot
Resource occupation amount T3 carries out the control information of the data information and third predetermined number when the T1 is more than the T3
Polymerization is transmitted the data information after polymerization with control information；It is when the T1 is less than or equal to the T3, then right
Preset MCS index values are respectively adopted in the control information and the data information, the initial MCS index values are passed respectively
It is defeated, wherein the preset MCS index values are less than or equal to the initial MCS index values；
Wherein, when the T3 is transmitted for the control information and data information of the third predetermined number under the mode of polymerization
Time interval resource occupancy.
10. device according to claim 6, which is characterized in that described device further includes：
Monitoring modular, initial MCS indexes used by being suitable for obtaining present channel transmission data information in the acquisition module
Before value, monitor in current data information to be sent whether exist simultaneously control information and data information；
The acquisition module, it is particularly applicable to work as monitoring modular in current data information to be sent while monitoring control information
When with data information, the operation of initial MCS index values used by obtaining present channel transmission data information is executed.
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