CN103096351B - WIFI parameter determination method and device, method for transmitting signals and system - Google Patents
WIFI parameter determination method and device, method for transmitting signals and system Download PDFInfo
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Abstract
Embodiments provide Wi-Fi parameter determination method and device, it is applied to the orthogonal channel using medium radio frequency to reveal in the propagation medium of principle, determine that the thresholding of each orthogonal channel launches power successively, making with thresholding transmitting power when present channel launches signal, the signal received from the adjacent channel of present channel disclosure satisfy that default condition；Determine that each orthogonal channel uses respective thresholding to launch the carrier sense thresholding of power transmission signal at other channel successively, because the determination principle that the thresholding of each channel launches power is not affect the signal receiving quality in adjacent channel, the determination principle of each channel is the jamming power sum more than other channel described, therefore, same employing medium radio frequency is revealed in the propagation medium of principle and can there is orthogonal channel, it is thus possible to significantly reduce cost required during transmission multiple signals.
Description
Technical field
The present invention relates to the communications field, particularly relate to WIFI parameter determination method and device, method for transmitting signals and system.
Background technology
Along with the development of track traffic, track train needs the quantity of information mutual with ground day by day to increase, and at present, track train and ground use WIFI mode to communicate.In order to ensure the transmission quality of signal, generally select waveguide as telecommunication media.Due to the characteristic of waveguide cavity, signal decay in waveguide cavity is the least, therefore, even if use orthogonal channel, because the decay of signal is the least, so the secondary lobe leakage power of signal can produce serious monkey chatter, it is seen that, same waveguide also cannot transmit multiple signals, so, face the situation that track train needs the quantity of information mutual with ground day by day to increase, multiple signals to be transmitted, it is accomplished by using many waveguides, thus causes the increase of cost.
Summary of the invention
In view of this, a kind of WIFI parameter determination method and device, method for transmitting signals and device are embodiments provided, it is therefore intended that solve the problem that a waveguide cannot transmit multiple signals simultaneously.
To achieve these goals, techniques below scheme is embodiments provided:
A kind of WIFI parameter determination method, is applied to the propagation medium using medium radio frequency to reveal principle, and described propagation medium includes N number of orthogonal channel, and wherein, described N is integer, and N >=2, and described method includes:
Thresholding when launching signal in true directional channel n successively launches power PnSo that with described thresholding transmitting power when channel n launches signal, meet default condition from the quality with the signal received described channel adjacent for channel n；
Determine successively with respective thresholding launch power in other channel, launch signal time, the carrier sense thresholding Q of channel nnSo that the carrier sense thresholding of described channel n is more than the jamming power sum of other channel described, wherein, and described n=1,2 ... N.
Preferably, thresholding when launching signal in described true directional channel n successively is launched power and is included:
Successively each channel is performed following steps, until traveling through described N number of channel:
In channel i, signal is launched with default power；
Receive and the signal on described channel adjacent for channel i；
When the quality with the signal on described channel adjacent for channel i received is unsatisfactory for the condition preset, adjust in described channel i, launch the transmitting power of signal, until described in the quality with the signal on described channel adjacent for channel i that receives meet default condition；
Transmitting power when the quality of the signal on described that receive and described channel adjacent for channel i is met default condition deducts the result of the first default performance number and launches power as the thresholding launching signal to channel i, and wherein, described i is integer, and i≤N.
Preferably, described determine successively with respective thresholding launch power in other channel, launch signal time, the carrier sense thresholding of channel n includes:
Successively each channel is performed following steps, until traveling through described N number of channel:
Detect when launching signal with respective thresholding transmitting power in other channel, the signal power received in channel i；
The power of the signal received in described channel i is added the result carrier sense thresholding as described channel i of the second performance number preset.
Preferably, described default condition includes:
The packet loss of signal is less than the value preset.
A kind of method for transmitting signals, including:
Power P is launched with default thresholdingnLaunching signal in the channel n of the propagation medium using medium radio frequency to reveal principle, described default thresholding launches power PnThe quality of the signal for making and receive on described channel adjacent for channel n meets the transmitting power of default condition, the signal in orthogonal launched in described N number of channel；
With default carrier sense thresholding QnReceive the signal of described channel n, described default carrier sense thresholding QnMore than with respective thresholding launch power in other channel, launch signal time, the jamming power sum of other channel described, wherein, described n=1,2 ... N, described N are integer, and N >=2.
6, method according to claim 5, it is characterised in that described with default thresholding transmitting power PnIn described channel n, launch signal include:
Combiner is used to carry out described signal closing road；
Coaxial converter is used the input signal of described combiner to be imported in described propagation medium.
A kind of WIFI parameter determination device, is applied to the propagation medium using medium radio frequency to reveal principle, and described propagation medium includes N number of orthogonal channel, and wherein, described N is integer, and N >=2, and described device includes:
Thresholding launches power determination module, and thresholding when launching signal in true directional channel n successively launches power PnSo that with described thresholding transmitting power when channel n launches signal, meet default condition from the quality with the signal received described channel adjacent for channel n；
Carrier sense thresholding determines module, when launching signal with respective thresholding transmitting power for determining successively in other channel, and the carrier sense thresholding Q of channel nnSo that the carrier sense thresholding of described channel n is more than the jamming power sum of other channel described, wherein, and described n=1,2 ... N.
Preferably, described thresholding transmitting power determination module includes:
First loop control module, for successively each channel being performed following steps, until traveling through described N number of channel:
Transmitter unit, for launching signal with default power in channel i；
Receive unit, for receiving and the signal on described channel adjacent for channel i；
Adjustment unit, during for being unsatisfactory for, when the quality with the signal on described channel adjacent for channel i received, the condition preset, adjust in described channel i, launch the transmitting power of signal, until described in the quality with the signal on described channel adjacent for channel i that receives meet default condition；
First computing unit, power of launching during for the quality of the signal on described that receive and described channel adjacent for channel i is met default condition deducts the result of the first default performance number as the thresholding transmitting power launching signal to channel i, wherein, described i is integer, and i≤N.
Preferably, described carrier sense thresholding determines that module includes:
Second loop control unit, for successively each channel being performed following steps, until traveling through described N number of channel:
Detector unit, for detection when launching signal with respective thresholding transmitting power in other channel, the signal power received in channel i；
Second computing unit, the power of the signal for receiving in described channel i adds the result carrier sense thresholding as described channel i of the second performance number preset.
A kind of signal transmission system, including:
Transmitter unit, for launching power P with default thresholdingnLaunching signal in the channel n of the propagation medium using medium radio frequency to reveal principle, described default thresholding launches power PnThe quality of the signal for making and receive on described channel adjacent for channel n meets the transmitting power of default condition, the signal in orthogonal launched in described N number of channel；
Receive unit, for default carrier sense thresholding QnReceive the signal of described channel n, described default carrier sense thresholding QnMore than with respective thresholding launch power in other channel, launch signal time, the jamming power sum of other channel described, wherein, described n=1,2 ... N, described N are integer, and N >=2.
nullThe WIFI parameter determination method of embodiment of the present invention offer and device，It is applied to the orthogonal channel using medium radio frequency to reveal in the propagation medium of principle，Determine that the thresholding of each orthogonal channel launches power successively，Make to launch power when present channel launches signal with described thresholding，The signal received from the adjacent channel of present channel disclosure satisfy that default condition，And，Determine that each orthogonal channel uses respective thresholding to launch the carrier sense thresholding of power transmission signal at other channel successively，Because the determination principle that the thresholding of each channel launches power is not affect the signal receiving quality in adjacent channel，The carrier sense thresholding of each channel determines under conditions of the interference being able to receive that other channels all，Principle is the jamming power sum more than other channel described，So，On the one hand can reduce and use medium radio frequency to reveal the interference that the leakage power of the orthogonal channel in the propagation medium of principle causes，On the other hand，It can be avoided that the channel that leakage power causes is kept out of the way，Therefore，Same employing medium radio frequency is revealed in the propagation medium of principle and can there is orthogonal channel，The most same propagation medium can transmit orthogonal signalling simultaneously，So that multiple signals can transmit in a propagation medium，Reception antenna quantity at propagation medium pipe opposite side can also be reduced to one，It is thus able to significantly reduce cost required during transmission multiple signals.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart that a kind of messaging parameter disclosed in the embodiment of the present invention determines method；
Fig. 2 is the schematic diagram of the application scenarios that a kind of messaging parameter disclosed in the embodiment of the present invention determines method；
Fig. 3 is the flow chart that the embodiment of the present invention another messaging parameter disclosed determines method；
Fig. 4 is the flow chart of a kind of method for transmitting signals disclosed in the embodiment of the present invention；
Fig. 5 is the structural representation that a kind of messaging parameter disclosed in the embodiment of the present invention determines device；
Fig. 6 is the structural representation of a kind of signal transmission system disclosed in the embodiment of the present invention.
Detailed description of the invention
The embodiment of the invention discloses a kind of WIFI parameter determination method and device, purpose is to transmit in same employing medium radio frequency reveals the propagation medium of principle so that orthogonal signalling and not disturbed by secondary lobe, its central inventive point is, determine the messaging parameter of orthogonal channel in propagation medium, when making to launch signal in each channel, do not affect the quality of the signal of adjacent channel, and the carrier sense thresholding of each channel is higher than the jamming power sum of other all channels；Meanwhile, the embodiment of the invention also discloses a kind of method for transmitting signals and system, use above-mentioned determine after messaging parameter, in same employing medium radio frequency reveals the propagation medium of principle, transmit orthogonal signalling.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
A kind of WIFI parameter determination method disclosed in the embodiment of the present invention, is applied to the propagation medium using medium radio frequency to reveal principle, and described employing medium radio frequency is revealed the propagation medium of principle and included N number of orthogonal channel, wherein, described N is integer, and N >=2, as it is shown in figure 1, described method includes:
S101: thresholding when launching signal in true directional channel n successively launches power, make to launch power when channel n launches signal with described thresholding, from meeting default condition with the quality of signal received described channel adjacent for channel n, wherein, described n=1,2 ... N；
The condition wherein preset can be that the packet loss of signal is less than the value preset.
The purpose of this step is, determines and launches power to the thresholding of each signal channel launched, during so that launch signal in any one channel, does not interferes with the quality of the signal received from channel adjacent thereto.
It should be noted that described thresholding launches power is directed to maximum transmission power when present channel launches signal, say, that when launching signal in present channel, launch power and can not launch power more than the thresholding that determines.
S102: determine successively and launch power Q with respective thresholdingnWhen launching signal in other channel, the carrier sense thresholding of channel n so that the carrier sense thresholding of described channel n is more than the jamming power sum of other channel described, wherein, described n=1,2 ... N.
The purpose of this step is, to with any one channel in N number of orthogonal channel, when launching power transmission signal with each self-corresponding thresholding in other N-1 channel, determine the carrier sense thresholding of present channel, make the carrier sense thresholding jamming power sum more than other channel described of present channel, it is ensured that adjacent channel does not results in keeping out of the way of present channel.
WIFI parameter determination method described in the present embodiment, determine respectively and use medium radio frequency to reveal the messaging parameter of orthogonal channel in the propagation medium of principle, power is launched including the thresholding launching signal in each channel, and the carrier sense thresholding of each channel, make not interfere with the quality of the signal in adjacent channel when present channel launches signal, when other channel all transmits signal, present channel will not be interfered and produce and keep out of the way, therefore, method described in the present embodiment is it can be avoided that use medium radio frequency to reveal interfering with each other between the N number of orthogonal channel in the propagation medium of principle.
The propagation medium using medium radio frequency to reveal principle described in the embodiment of the present invention can be waveguide, it is also possible to for revealing cable, does not limits, for convenience of description, is the most all described as a example by waveguide.
The embodiment of the present invention another WIFI parameter determination method disclosed, is applied to following scene:
As shown in Figure 2, use the WIFI signal interacted between same waveguide track train and ground, A, B, C end being wherein connected with waveguide by combiner and coaxial converter be hold, the D being connected with waveguide data by WIFI mode is car end, the N number of channel quadrature in waveguide.Wherein, ground end passes sequentially through combiner and is connected with one end of waveguide with waveguide coaxial converter, ring flange, and the other end of waveguide arranges leakage load and is connected with other waveguide.
As it is shown on figure 3, described method includes:
S301: launching signal in channel i with default power, wherein, described i is integer, and the i that i≤N(appears below is the most identical, repeats no more)；
Here, the maximum transmission power that the power preset can be able to reach with preferred emission equipment.
S302: receive and the signal on described channel adjacent for channel i；
Wherein, the possible only one of which of adjacent with channel i channel, it is also possible to have more than one.
S303: judge the condition preset the most satisfied with the signal on described channel adjacent for channel i quality that be that receive, if it is, perform S305, if it does not, perform S304；
Wherein, the condition preset can be that the packet loss of signal is less than the value preset, and the packet loss of such as signal is less than in signal the 1% of packet total amount.
S304: adjust the transmitting power launching signal in described channel i, returns and performs S303；
If the maximum transmission power that preferred emission power is transmitting equipment, the transmitting power launching signal in described channel i can be reduced according to default step value.
S305: the power of the launching when quality of the signal on described that receive and described channel adjacent for channel i is met default condition deducts the result of the first default performance number as the thresholding transmitting power launching signal to channel i.
Wherein, described the first default performance number is preferably the protection interval preset.
That is: if the transmitting power when quality with the signal on described channel adjacent for channel i received meets default condition is Pi, then by Pi-Δ 1 launches power as the thresholding launching signal to channel i, and wherein, Δ 1 is the protection interval preset, and Δ 1 can be 10log (N-1).
It should be noted that in actual applications, an adjustable attenuator can be concatenated in the port front end of channel i, launch power P at the thresholding being calculated port by method as defined aboveiAfter, by adjusting adjustable attenuator, it is achieved it is P that the signal to channel i transmitting enters the power of waveguidei-Δ1。
S306: judge whether to travel through N number of channel, if it is, perform S307, if it does not, perform S301；
After traveling through N number of channel, it is possible to determine that the thresholding of any one signal channel launched in N number of channel launches power.
S307: detect when launching signal with respective thresholding transmitting power in other channel, the signal power received in channel i；
That is: selecting any one channel i, the thresholding determined with each channel is launched power emission and is launched signal, the power of the signal received in the channel that detection is selected in all of channel in addition to this selected channel.
S308: the power of the signal received in described channel i is added the result carrier sense thresholding as described channel i of the second performance number preset.
Wherein, the second performance number preset is preferably the power protection interval preset.
That is: if the power of the signal received in channel i is Qi, then the carrier sense thresholding of channel i is Qi+ Δ 2, wherein, Δ 2 is the protection interval preset, such as Δ 2=3dBm.
S309: judge whether to travel through N number of channel, if it is, terminate, if it does not, perform S307.
After traveling through N number of channel, it is possible to determine the carrier sense thresholding of each channel.
As a example by Fig. 2, the present embodiment determines the process of messaging parameter particularly as follows:
One signal source is linked into port A, and it is configured to channel 1, in channel 1, signal is launched continuously with maximum transmission power P=15dBm, simultaneously, peak power is used to launch packet in the channel 6 adjacent with channel 1 in reference point D, receive the packet on channel 6, whether the packet loss of the signal on channel 6 that detection receives is less than the value preset, if not, stepping reduces the transmitting power of the signal source of port A, until the packet loss of the signal received from channel 6 is less than the value preset, when assuming the transmitting power reduction of signal source to P=-2dBm, packet loss is less than the value preset, then by P1=-2dBm-Δ 1 launches power, such as, P as the thresholding of channel 11=-2dBm-10log102=-5dBm, wherein Δ 1 is an example of the first performance number preset.
It should be noted that, in Fig. 2, the channel adjacent with channel 1 only has channel 6, if it is adjacent with channel 1 when also having other channel, then need to use above-mentioned steps, determine that the thresholding of another adjacent channel launches power, two thresholdings are launched the thresholding transmitting power as channel 1 of the minima-Δ 1 in power, it is to say, the thresholding launching signal in channel 1 launches power should be ensured that the signal not transmitted any one adjacent channel impacts.
Similarly, it is assumed that the thresholding transmitting power recording channel 11 is P11=-8dBm, at port A with P1=-5dBm launches signal, at port C with P11=-8dBm launches signal, the power of the signal on channel 6 that now detection port B receives, it is assumed that the power of the channel that port B receives is-70dBm, then the carrier sense thresholding of channel 6 is defined as Q6=-70dBm+Δ2=-70dBm+3dBm=-67dBm.In like manner, the carrier sense thresholding of channel 1 and channel 11 can be determined respectively.
Messaging parameter described in the present embodiment determines method, it is determined by the orthogonal channel that waveguide is positive thresholding that launch signal, that other channel is not interfered and launches power, and can receive from orthogonal channel newly to, the carrier sense thresholding of the channel kept out of the way will not be produced again because of the interference of other channel, it can be avoided that interfering between orthogonal channel in waveguide, therefore, it can be avoided that the side interference between orthogonal signalling in waveguide cavity, so that use multiple orthogonal channel to be possibly realized in same waveguide
A kind of method for transmitting signals disclosed in the embodiment of the present invention, as shown in Figure 4, including:
S401: launch power P with default thresholdingnSignal is launched in the channel n of waveguide；
Described default thresholding launches power PnThe quality of the signal for making and receive on described channel adjacent for channel n meets the transmitting power of default condition, the signal in orthogonal launched in described N number of channel；
It is to say, launch N road orthogonal signalling in waveguide, launch the thresholding that every road orthogonal signalling use and launch power and preset, for making not interfere with to the signal of arbitrary channels transmit the reception of signal in adjacent channel.
Such as, as shown in Figure 2, communication-based train control (CommunicationBasedTrainControl is launched in channel 1, CBTC) signal, passenger information system (PassengerInformationSystem is launched in channel 6, PIS) signal, wherein, the power launching CBTC signal is P1, the transmitting power launching PIS signal is P6, P1Thresholding for making the signal received from channel 6 meet default condition launches power, P6Thresholding for making the signal received from channel 1 and channel 11 meet default condition launches power.
Wherein, to the thresholding determining method of launch power of each signal channel launched as described in above-described embodiment, repeat no more here.
In the present embodiment, it is preferable that when different signal channel launcheds, use combiner that described signal carries out closing road, and use waveguide coaxial converter the input signal of described combiner to be imported in described waveguide.
S402: with default carrier sense thresholding QnReceive the signal of described channel n, described default carrier sense thresholding QnMore than with respective thresholding launch power in other channel, launch signal time, the jamming power sum of other channel described, wherein, described n=1,2 ... N, described N are integer, and N >=2.
In the present embodiment, each channel receives signal with default carrier sense thresholding, the carrier sense thresholding preset is more than when other channel launches power transmission signal with respective thresholding, present channel is disturbed the summation of signal, that is:, when receiving the signal in waveguide, different channels uses the carrier sense thresholding that above-described embodiment determines.
Such as, as in figure 2 it is shown, at port A with P1=-5dBm launches signal, at port C with P11When=-8dBm launches signal, channel 6 intercepts signal with the carrier sense thresholding of-70dBm.
Method for transmitting signals described in the present embodiment, orthogonal signalling are transmitted in same waveguide, unlike the prior art, the thresholding transmitting power launching orthogonal signalling in waveguide is the transmitting power so that meeting default condition with the quality of the signal received on described channel adjacent for channel n, from channel, receive the carrier sense thresholding of signal launch power to when other channel launches signal more than with respective thresholding, the jamming power sum of other channel described, it is thus possible to avoid when ground end launches signal, reception to the signal of adjacent channel interferes, avoid when Channel Received Signal simultaneously, receive the interference of signal in different channels, it is achieved thereby that the transmission that multichannel orthogonal signalling are in same waveguide, multiple signals are made to need not use many waveguides, reduce the cost of transmission multiple signals.
Corresponding with said method embodiment, the embodiment of the invention also discloses a kind of messaging parameter and determine device, be applied to waveguide, described waveguide includes N number of orthogonal channel, and wherein, described N is integer, and N >=2, as it is shown in figure 5, described device includes:
Thresholding launches power determination module 501, and thresholding when launching signal in true directional channel n successively launches power PnSo that with described thresholding transmitting power when channel n launches signal, meet default condition from the quality with the signal received described channel adjacent for channel n；
Carrier sense thresholding determines module 502, when launching signal with respective thresholding transmitting power for determining successively in other channel, and the carrier sense thresholding Q of channel nnSo that the carrier sense thresholding of described channel n is more than the jamming power sum of other channel described, wherein, and described n=1,2 ... N.
Further, described thresholding transmitting power determination module includes:
First loop control module, for successively each channel being performed following steps, until traveling through described N number of channel:
Transmitter unit, for launching signal with default power in channel i；
Receive unit, for receiving and the signal on described channel adjacent for channel i；
Adjustment unit, during for being unsatisfactory for, when the quality with the signal on described channel adjacent for channel i received, the condition preset, adjust in described channel i, launch the transmitting power of signal, until described in the quality with the signal on described channel adjacent for channel i that receives meet default condition；
First computing unit, power of launching during for the quality of the signal on described that receive and described channel adjacent for channel i is met default condition deducts the result of the first default performance number as the thresholding transmitting power launching signal to channel i, wherein, described i is integer, and i≤N.
Further, described carrier sense thresholding determines that module includes:
Second loop control unit, for successively each channel being performed following steps, until traveling through described N number of channel:
Detector unit, for detection when launching signal with respective thresholding transmitting power in other channel, the signal power received in channel i；
Second computing unit, the power of the signal for receiving in described channel i adds the result carrier sense thresholding as described channel i of the second performance number preset.
Device described in the present embodiment can determine the messaging parameter of orthogonal channel in waveguide respectively, power is launched including the thresholding launching signal in each channel, and the carrier sense thresholding of each channel, make not interfere with the quality of the signal in adjacent channel when present channel launches signal, when other channel all transmits signal, present channel will not be interfered and produce and keep out of the way, and therefore, method described in the present embodiment is it can be avoided that interfering with each other between N number of orthogonal channel in waveguide.
The embodiment of the invention also discloses a kind of signal transmission system, as shown in Figure 6, including:
Transmitter unit 601, for launching power P with default thresholdingnLaunching signal in the channel n of waveguide, described default thresholding launches power PnThe quality of the signal for making and receive on described channel adjacent for channel n meets the transmitting power of default condition, the signal in orthogonal launched in described N number of channel；
Receive unit 602, for default carrier sense thresholding QnReceive the signal of described channel n, described default carrier sense thresholding QnMore than with respective thresholding launch power in other channel, launch signal time, the jamming power sum of other channel described, wherein, described n=1,2 ... N, described N are integer, and N >=2.
In the track train system with ground communication, specifically arranging of system described in the present embodiment can be as shown in Figure 2, the signal that described transmitter unit can be held with including launches equipment, it is launched power to the thresholding that different signal channel launcheds is used and can ensure that the signal of adjacent channel reception is not interfered by the signal of transmitting, receiving the signal receiver that can hold with including of unit, the carrier sense thresholding of its never co-channel reception signal ensures reception not the disturbing by the signal in other channel of present channel signal.Therefore, the signal transmission system described in the present embodiment, it is possible to use waveguide multichannel orthogonal signalling.
If the function described in the present embodiment method is using the form realization of SFU software functional unit and as independent production marketing or use, a calculating device-readable can be stored in and take in storage medium.Based on such understanding, part or the part of this technical scheme that prior art is contributed by the embodiment of the present invention can embody with the form of software product, this software product is stored in a storage medium, including some instructions with so that a calculating equipment (can be personal computer, server, mobile computing device or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium includes: the various media that can store program code such as USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CDs.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and between each embodiment, same or similar part sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.Multiple amendment to these embodiments will be apparent from for those skilled in the art, and generic principles defined herein can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (10)
1. a WIFI parameter determination method, it is characterised in that being applied to the propagation medium using medium radio frequency to reveal principle, described propagation medium includes N number of orthogonal channel, and wherein, described N is integer, and N >=2, and described method includes:
Thresholding when launching signal in true directional channel n successively launches power PnSo that with described thresholding transmitting power when channel n launches signal, from meeting default condition with the quality of the signal received described channel adjacent for channel n, wherein, described thresholding transmitting power is directed to maximum transmission power during present channel transmitting signal；
Determine the carrier sense thresholding Q launching channel n when power launches signal in other channel with respective thresholding successivelynSo that the carrier sense thresholding of described channel n is more than the jamming power sum of other channel described, wherein, and described n=1,2 ... N.
Method the most according to claim 1, it is characterised in that thresholding when launching signal in described true directional channel n successively is launched power and included:
Successively each channel is performed following steps, until traveling through described N number of channel:
In channel i, signal is launched with default power；
Receive and the signal on described channel adjacent for channel i；
When the quality with the signal on described channel adjacent for channel i received is unsatisfactory for the condition preset, adjust in described channel i, launch the transmitting power of signal, until described in the quality with the signal on described channel adjacent for channel i that receives meet default condition；
Transmitting power when the quality of the signal on described that receive and described channel adjacent for channel i is met default condition deducts the result of the first default performance number and launches power as the thresholding launching signal to channel i, and wherein, described i is integer, and i≤N.
Method the most according to claim 1 and 2, it is characterised in that the carrier sense thresholding of the described channel n determined successively when launching signal in other channel with respective thresholding transmitting power includes:
Successively each channel is performed following steps, until traveling through described N number of channel:
Detect when launching the signal power received in channel i when power launches signal in other channel with respective thresholding；
The power of the signal received in described channel i is added the result carrier sense thresholding as described channel i of the second performance number preset.
Method the most according to claim 1, it is characterised in that described default condition includes:
The packet loss of signal is less than the value preset.
5. a method for transmitting signals, it is characterised in that including:
Power P is launched with default thresholdingnLaunching signal in the channel n of the propagation medium using medium radio frequency to reveal principle, described default thresholding launches power PnThe quality of the signal for making and receive on described channel adjacent for channel n meets the transmitting power of default condition, the signal in orthogonal launched in N number of channel, and wherein, described thresholding transmitting power is directed to maximum transmission power during present channel transmitting signal；
With default carrier sense thresholding QnReceive the signal of described channel n, described default carrier sense thresholding QnMore than with respective thresholding launch power in other channel, launch signal time, the jamming power sum of other channel described, wherein, described n=1,2 ... N, described N are integer, and N >=2.
Method the most according to claim 5, it is characterised in that described with default thresholding transmitting power PnIn described channel n, launch signal include:
Combiner is used to carry out described signal closing road；
Coaxial converter is used the input signal of described combiner to be imported in described propagation medium.
7. a WIFI parameter determination device, it is characterised in that being applied to the propagation medium using medium radio frequency to reveal principle, described propagation medium includes N number of orthogonal channel, and wherein, described N is integer, and N >=2, and described device includes:
Thresholding launches power determination module, and thresholding when launching signal in true directional channel n successively launches power PnSo that with described thresholding transmitting power when channel n launches signal, from meeting default condition with the quality of the signal received described channel adjacent for channel n, wherein, described thresholding transmitting power is directed to maximum transmission power during present channel transmitting signal；
Carrier sense thresholding determines module, for determining the carrier sense thresholding Q launching channel n when power launches signal in other channel with respective thresholding successivelynSo that the carrier sense thresholding of described channel n is more than the jamming power sum of other channel described, wherein, and described n=1,2 ... N.
Device the most according to claim 7, it is characterised in that described thresholding is launched power determination module and included:
First loop control module, for successively each channel being performed following steps, until traveling through described N number of channel:
Transmitter unit, for launching signal with default power in channel i；
Receive unit, for receiving and the signal on described channel adjacent for channel i；
Adjustment unit, during for being unsatisfactory for, when the quality with the signal on described channel adjacent for channel i received, the condition preset, adjust in described channel i, launch the transmitting power of signal, until described in the quality with the signal on described channel adjacent for channel i that receives meet default condition；
First computing unit, power of launching during for the quality of the signal on described that receive and described channel adjacent for channel i is met default condition deducts the result of the first default performance number as the thresholding transmitting power launching signal to channel i, wherein, described i is integer, and i≤N.
Device the most according to claim 7, it is characterised in that described carrier sense thresholding determines that module includes:
Second loop control unit, for successively each channel being performed following steps, until traveling through described N number of channel:
Detector unit, for detection when launching the signal power received in channel i when power launches signal in other channel with respective thresholding；
Second computing unit, the power of the signal for receiving in described channel i adds the result carrier sense thresholding as described channel i of the second performance number preset.
10. a signal transmission system, it is characterised in that including:
Transmitter unit, for launching power P with default thresholdingnLaunching signal in the channel n of the propagation medium using medium radio frequency to reveal principle, described default thresholding launches power PnThe quality of the signal for making and receive on described channel adjacent for channel n meets the transmitting power of default condition, the signal in orthogonal launched in N number of channel, and wherein, described thresholding transmitting power is directed to maximum transmission power during present channel transmitting signal；
Receive unit, for default carrier sense thresholding QnReceive the signal of described channel n, described default carrier sense thresholding QnMore than with respective thresholding launch power in other channel, launch signal time, the jamming power sum of other channel described, wherein, described n=1,2 ... N, described N are integer, and N >=2.
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