CN109688628A - Method for transmitting signals, relevant apparatus and system - Google Patents
Method for transmitting signals, relevant apparatus and system Download PDFInfo
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- CN109688628A CN109688628A CN201710981757.7A CN201710981757A CN109688628A CN 109688628 A CN109688628 A CN 109688628A CN 201710981757 A CN201710981757 A CN 201710981757A CN 109688628 A CN109688628 A CN 109688628A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
- H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
This application discloses a kind of method for transmitting signals, relevant apparatus and systems.The method can include: access point sends the first signal to the first equipment by the first bandwidth, and first signal is used for reserve channel；Described access point sends second signal by the second bandwidth, and the second signal is used to indicate the second equipment and keeps silent；Described access point sends data to first equipment by first bandwidth；Wherein, first bandwidth is different with second bandwidth, and first bandwidth is all covered on frequency domain by second bandwidth.Above scheme can avoid channel confliction.
Description
Technical field
This application involves fields of communication technology, in particular to method for transmitting signals, relevant apparatus and system.
Background technique
With the development of Internet of Things (internet of things, IoT) technology, more and more IoT equipment (IoT
Station, IoT STA), such as rfid device, infrared inductor, global positioning system, laser scanner, it requires to lead to
It crosses and is connected to the network and communicates.Wherein, IoT equipment accesses internet by Wireless Fidelity (wIreless-fidelity, WiFi)
And communicating is an important research direction.
WiFi is instantly (can such as to be slapped PC, handheld device using a kind of most wide wireless network transmission technology
Upper computer, mobile phone) etc. terminals wirelessly interconnect.Currently, largely use International Power electric using the equipment of WiFi
802.11 protocol families that sub- Engineering society (IEEE) is formulated, bandwidth of operation are 20MHz or so.And in the application scenarios of IoT, it is
The power consumption and design cost of IoT equipment are reduced, IoT equipment is usually operated on narrowband (2MHz or so).
Currently, how traditional WiFi equipment, two kinds of IoT equipment work are used in conjunction with WiFi frequency in the equipment of different bandwidth
Section the problem of urgent need to resolve.
Summary of the invention
This application provides a kind of method for transmitting signals, relevant apparatus and system, it can be avoided that bandwidth of operation is different to be set
Preparation gives birth to channel confliction.
In the application, the bandwidth of operation of the first equipment is the first bandwidth, and the bandwidth of operation of the second equipment is the second bandwidth.Tool
During body is realized, the first equipment can be work in the IoT equipment of 2MHz or so, and the second equipment can be work in 20MHz or so
WiFi equipment.
In the application, in downlink transfer, access point needs to send data in communication system in multiple first equipment
Some first equipment；In uplink, some first equipment in communication system in multiple first equipment needs to send
Data are to access point.In order to more clearly describe the application, subsequent the first equipment mentioned is some first equipment.
In a first aspect, applying this application provides a kind of method for transmitting signals in access point side, it may include: access point is logical
It crosses the first bandwidth and sends the first signal to the first equipment, first signal is used for reserve channel；Described access point passes through second
Bandwidth sends second signal, and the second signal is used to indicate the second equipment and keeps silent；Described access point passes through described first
Bandwidth sends data to first equipment；Wherein, first bandwidth is different with second bandwidth, and first bandwidth
It is all covered on frequency domain by second bandwidth.
Second aspect is applied this application provides a kind of method for transmitting signals in the first equipment side, it may include: first sets
Standby the first signal for receiving access point and sending, first signal are used for reserve channel；First equipment receives the access
The data that point is sent；Wherein, the bandwidth of operation of first equipment is the first bandwidth.
The method for transmitting signals for implementing first aspect and second aspect sends data to the first equipment in access point downlink
When, it can be avoided generation channel confliction.
With reference to first aspect and second aspect, in an alternative embodiment, the first signal, second signal can be realized to remove hair
Send frame (clear to send, CTS).Be described below in the alternative embodiment, the first signal, second signal structure and
Effect.
1, the first signal
It include the instruction information of the first duration, the duration field being embodied as in CTS frame in first signal.
Optionally, the value of the first duration is greater than or equal to since the first equipment has received the first signal, to the
One equipment has received the time between the data of access point transmission, it is ensured that during access point sends data to the first equipment, connects
Other first equipment in access point coverage area in addition to the first equipment are not take up channel.First is introduced in two kinds of situation below to continue
The specific value of time.
(1) access point first sends the first signal, sends second signal afterwards.In this case, the first signal is whole flow process
In initial frame, the value of the first duration therein is no more than send opportunity and limits time (transmission
Opportunity limit, TXOP limit), send opportunity limits the time as busy channel as defined in IEEE802.11 agreement
Maximum time.
In a specific embodiment, between the first duration=second signal (CTS frame)+data frame+ACK frame+interframe
Every time.Wherein, ACK frame is that the first equipment receives the acknowledgement frame that access point is sent to after data frame, the number of interframe space
Amount depends on the quantity of the frame of interaction in whole flow process, and, whether there is interframe space between the first signal and the second signal.
(2) access point first sends second signal, rear to send the first signal.
In a specific embodiment, the first duration=the second duration-second signal (CTS frame).
After access point sends the first signal by the first bandwidth, in access point coverage area in addition to the first equipment other the
One equipment can listen to the first signal, and keep silent within the first duration.
2, second signal
It include the instruction information of the second duration, the duration field being embodied as in CTS frame in second signal.
The value of second duration is greater than or equal to since the second equipment has listened to second signal, connects to the first equipment
Harvest the time between the data of access point transmission, it is ensured that during access point sends data to the first equipment, access point covering
Second equipment of range is not take up channel.Introduce the specific value of the second duration in two kinds of situation below.
(1) access point first sends the first signal, sends second signal afterwards.
Wherein, the second duration=first the-the first signal of duration (CTS frame).
(2) access point first sends second signal, rear to send the first signal.In this case, second signal is whole flow process
In initial frame, the value of the second duration therein is no more than send opportunity and limits the time.
In a specific embodiment, between the second duration=first signal (CTS frame)+data frame+ACK frame+interframe
Every time.
After access point sends second signal by the second bandwidth, the second equipment in access point coverage area can all be listened to
Second signal, also, keep silent within the second duration.
With reference to first aspect and second aspect, in an alternative embodiment, access point sends second signal by the second bandwidth
Before, first equipment is received the method also includes: described access point respond the third signal that first signal is sent.
Wherein, the first signal can realize that second signal, third signal can be realized to transmit claim frame (request to send, RTS)
For Clear to Send frame (CTS).Be described below in the alternative embodiment, the first signal, second signal, the structure of third signal with
And effect.
1, the first signal
It include the instruction information of the first duration, the duration field being embodied as in RTS frame in first signal.
In the alternative embodiment, the first signal is the initial frame in whole flow process, and the first duration therein takes
Value is no more than send opportunity limitation time (TXOP limit).
Optionally, the value of the first duration is greater than or equal to since the first equipment has received the first signal, to the
One equipment has received the time between the data of access point transmission.
In a specific embodiment, the first duration=third signal (CTS frame)+second signal (CTS frame)+data
Frame+ACK frame+interframe space time.The quantity of interframe space depends on the quantity of the frame of interaction in whole flow process.
After access point sends the first signal by the first bandwidth, in access point coverage area in addition to the first equipment other the
One equipment can listen to the first signal, and keep silent within the first duration.
2, third signal
It include the instruction information of third duration, the duration field being embodied as in RTS frame in third signal.
Wherein, third duration=first duration-third signal (CTS frame).In a specific embodiment,
The third duration=second signal (CTS frame)+data frame+ACK frame+interframe space time, the quantity of interframe space depends on
The quantity of the frame of interaction in whole flow process.
The first equipment respond the first signal, by the first bandwidth send third signal after and the first equipment it is non-each other hidden
Other first equipment of hiding website can listen to third signal, also, keep silent within the third duration.
3, second signal
It include the instruction information of the second duration, the duration field being embodied as in CTS frame in second signal.
Wherein, the second duration=first duration-third signal (CTS frame)+second signal (CTS frame).One
In specific embodiment, the second duration=data frame+ACK frame+interframe space time.The quantity of interframe space depends on
The quantity of the frame of interaction in whole flow process.
After access point sends second signal by the second bandwidth, all second equipment in access point coverage area all may be used
Second signal is listened to, also, keeps silent within the second duration.
In above-mentioned two alternative embodiment, interior other first equipment in addition to the first equipment of access point coverage area are connect
The second equipment in access point coverage area can all keep silent whithin a period of time, and during this period, access point can be to the first equipment
Data are sent, channel confliction is avoided.
The third aspect is applied this application provides a kind of method for transmitting signals in access point side, it may include: access point connects
The fourth signal of the first equipment transmission is received, the fourth signal is used for reserve channel；Described access point is in response to the 4th letter
Number, the first signal is sent to first equipment by the first bandwidth, first signal is used for reserve channel；Described access point
Second signal is sent by the second bandwidth, the second signal is used to indicate the second equipment and keeps silent；Wherein, the first band
It is wide different with second bandwidth, and first bandwidth is all covered on frequency domain by second bandwidth.
Fourth aspect is applied this application provides a kind of method for transmitting signals in the first equipment side, it may include: first sets
Standby to send fourth signal to access point, the fourth signal is used for reserve channel；First equipment receives described access point and rings
The first signal that fourth signal described in Ying Yu is sent, first signal are used for reserve channel；First equipment is by waiting
Time sends data to described access point；Wherein, the bandwidth of operation of first equipment is the first bandwidth.
Implement the method for transmitting signals of the third aspect and fourth aspect, goes send data to access point on the first device
When, it can be avoided generation channel confliction.
In conjunction with the third aspect and fourth aspect, in an alternative embodiment, fourth signal can be realized to transmit claim frame
(RTS), the first signal, second signal can be realized as Clear to Send frame.It is described below in the alternative embodiment, fourth signal,
The structure and effect of first signal, second signal.
1, fourth signal
It include the instruction information of the 4th duration, the duration field being embodied as in RTS frame in fourth signal.
In the alternative embodiment, fourth signal is the initial frame in whole flow process, and the 4th duration therein takes
Value is no more than send opportunity limitation time (TXOPlimit).
Optionally, the value of the 4th duration is greater than or equal to since access point has received fourth signal, to access
Point has received the time between the data of the first equipment transmission.
In a specific embodiment, the 4th duration=first signal (CTS frame)+second signal (CTS frame)+data
Frame+ACK frame+interframe space time.The quantity of interframe space depends on the quantity of the frame of interaction in whole flow process, and, the
Whether there is interframe space between one signal and second signal.
First equipment by the first bandwidth send fourth signal after and the first equipment each other non-concealed website other first
Equipment can listen to fourth signal, and keep silent within the 4th duration.
2, the first signal
It include the instruction information of the first duration, the duration field being embodied as in CTS frame in first signal.
The value of first duration be greater than or equal to since the first equipment has received the first signal, to the first equipment to
Access point has sent the time between data, it is ensured that during the first equipment sends data to access point, access point coverage area
Interior other second equipment in addition to the first equipment are not take up channel.Introduce specifically taking for the first duration in two kinds of situation below
Value.
(1) access point first sends the first signal, sends second signal afterwards.
Wherein, the first duration=the 4th the-the first signal of duration (CTS frame).
In a specific embodiment, between the first duration=second signal (CTS frame)+data frame+ACK frame+interframe
Every time.The quantity of interframe space depends on the quantity of the frame of interaction in whole flow process, and, the first signal and the second signal
Between whether have interframe space.
(2) access point first sends second signal, rear to send the first signal.
Wherein, the first duration=the 4th duration-second signal (CTS frame)-the first signal (CTS frame).
In a specific embodiment, the first duration=data frame+ACK frame+interframe space time.Interframe space
Quantity depend on whole flow process in interaction frame quantity.
After access point sends the first signal by the first bandwidth, in access point coverage area in addition to the first equipment other the
One equipment can listen to the first signal, also, keep silent within the first duration.
3, second signal
It include the instruction information of the second duration, the duration field being embodied as in CTS frame in second signal.
The value of second duration be greater than or equal to since the second equipment has received second signal, to the first equipment to
Access point has sent the time between data, it is ensured that during the first equipment sends data to access point, access point coverage area
The second interior equipment is not take up channel.Introduce the specific value of the second duration in two kinds of situation below.
(1) access point first sends the first signal, sends second signal afterwards.
Wherein, the second duration=the 4th the-the first signal of duration (CTS frame)-second signal (CTS frame).
In a specific embodiment, the first duration=data frame+ACK frame+interframe space time.Interframe space
Quantity depend on whole flow process in interaction frame quantity.
(2) access point first sends second signal, rear to send the first signal.
Wherein, the first duration=the 4th duration-second signal (CTS frame).
In a specific embodiment, between the first duration=first signal (CTS frame)+data frame+ACK frame+interframe
Every time.The quantity of interframe space depends on the quantity of the frame of interaction in whole flow process, and, the first signal and the second signal
Between whether have interframe space.
After access point sends second signal by the second bandwidth, the second equipment in access point coverage area can listen to the
Binary signal, also, keep silent within the second duration.
In conjunction with the third aspect and fourth aspect, in an alternative embodiment, fourth signal can be realized as quiet signal
(quietsignal, QS), the first signal, second signal can be realized as Clear to Send frame.It is described below in the alternative embodiment
In, fourth signal, the first signal, second signal structure and effect.
1, fourth signal
Specifically, fourth signal is embodied as QS, QS can be any one in sine wave, swept-frequency signal or busy signal.
Wherein, the information of fourth signal instruction has following several situations:
A, fourth signal indicates basic service set identification (BSScolor) belonging to the first equipment.
B, fourth signal indicates at least one of mark or the 4th duration of the first equipment.
Here, identical in the definition of the 4th duration and value and a upper alternative embodiment, it can refer to correlation and retouch
It states.
C, fourth signal indicates basic service set identification belonging to the first equipment, and, fourth signal indicates the first equipment
Mark or at least one of the 4th duration.
Wherein, above- mentioned information can pass through the frequency of sine wave, the initial frequency of swept-frequency signal or cutoff frequency, busy signal
Period or changing rule indicated.
Sent since fourth signal is the first equipment by the first bandwidth and the first equipment non-concealed website each other its
He can listen to fourth signal at the first equipment, also, keep whithin a period of time silent.
By above-mentioned a-c point it is found that may include the instruction information of the 4th duration in fourth signal, it is also possible to
It does not include the instruction information of the 4th duration.When in fourth signal including the instruction information of the 4th duration, and
After other first equipment of first equipment non-concealed website each other listen to fourth signal, being kept for the silent time is the 4th to continue
Time.When not having in fourth signal includes the instruction information of the 4th duration and the first equipment non-concealed website each other
After other first equipment listen to fourth signal, keep the silent time be can be the first preset time, this first it is default when
Between be greater than or equal to and other first equipment of the first equipment non-concealed website each other have listened to fourth signal to receiving point reception
The time between data that complete first equipment is sent guarantees and other first equipment of the first equipment non-concealed website each other will not
The busy channel during the first equipment sends data.
2, the first signal
3, second signal
It is intelligible, in the alternative embodiment, the structures of the first signal and the second signal and effect all with upper one
It is identical in alternative embodiment, it can refer to associated description.
In above-mentioned two alternative embodiment and other first equipment, access point of the first equipment non-concealed website each other
Other first equipment in addition to the first equipment in coverage area, the second equipment in access point coverage area all can be at one sections
Interior holding is silent, and during this period, the first equipment can send data to access point, avoids channel confliction.
In conjunction with the third aspect and fourth aspect, in an alternative embodiment, access point can be held under the instruction of the first equipment
Row sends the operation of second signal by the second bandwidth, there is following two indicating mode:
(1) pass through the flag bit instruction in fourth signal.
Specifically, when fourth signal is embodied as RTS frame, using existing field extension flag position, when flag bit takes
When the first value, it may be used to indicate access point and send second signal.Can use does not have the field of indicative significance as mark in RTS frame
Will position also can use the reserved extension field in RTS frame as flag bit.
(2) pass through the 5th signal designation.
Specifically, access point is sending the first signal to the first equipment by the first bandwidth, the first equipment hair is being received
After the 5th signal sent, then by the second bandwidth transmission second signal to the second equipment.Wherein, the 5th signal is used to indicate access
Point sends second signal.Wherein, the 5th signal can be realized as Clear to Send frame-opinion poll frame (CTS-POLL frame).
In conjunction with the third aspect and fourth aspect, the first equipment waits one after the first signal for receiving access point transmission
The section time sends data to access point again.It is illustrated by following two situation:
(1) access point first sends the first signal, retransmits second signal.
In this case, it after the first equipment sends fourth signal, after waiting 1 interframe space, can receive to the first letter
Number.After first equipment receives the first signal, that waits for a period of time is rear to access point transmission data.When the first signal and second
When signal is embodied as CTS frame and has interframe space between the two, waiting time=2 interframe space+second signal (CTS
Frame)；When the first signal and the second signal are embodied as CTS frame and do not have interframe space between the two, waiting time=1 frame
Between interval+second signal (CTS frame)；
(2) access point first sends second signal, retransmits the first signal.
In this case, after the first equipment sends fourth signal, 2 interframe space+second signals (CTS frame) are waited
After time, it can receive to the first signal.After first equipment receives the first signal, that waits for a period of time is rear to access point transmission
Data, waiting time=1 interframe space.
First alternative embodiment with reference to first aspect, in conjunction with the third aspect and fourth aspect, in an alternative embodiment,
The transmission sequence and sending method of first signal and second signal include following several:
(1) access point passes through the first bandwidth the first signal of transmission to the first equipment first, is then sent by the second bandwidth
Second signal gives the second equipment.
(2) access point passes through the second bandwidth transmission second signal to the second equipment first, is then sent by the first bandwidth
First signal gives the first equipment.
In (1) kind and (2) kind situation, when the first signal and the second signal are realized as CTS frame, the first signal
It may include interframe space between second signal, can not also include interframe space.When between the first signal and the second signal
When not including interframe space, reduces the time of information exchange, efficiency can be improved.
(3) when the first signal and the second signal are realized as CTS frame, the first signal is divided into two parts: leading part
(preamble) and frame main body (part in radio frames in addition to preamble), leading part is transmitted in the second signal
Before, frame main body is transmitted in after the second signal.
5th aspect, this application provides a kind of access points, for executing the signal of first aspect or third aspect description
Transmission method.Described access point can include: memory and the processor coupled with the memory, transmitter and receiver,
Wherein: the transmitter is used to send signal with to the first equipment or the second equipment, the receiver for receive the first equipment,
The signal that second equipment or other access points are sent, the memory are used to store the method for transmitting signals of first aspect description
Realize code, the processor executes first aspect or first party for executing the program code stored in the memory
Any one provided signal in the possible embodiment of the possible embodiment in face, the third aspect or the third aspect
Transmission method.Optionally, the access point of the 5th aspect can be chipset；Memory and processor can integrate in same core
On piece can also be separately positioned on different chips.
6th aspect, this application provides a kind of first equipment, for executing the letter of second aspect or fourth aspect description
Number transmission method.First equipment can include: memory and the processor coupled with the memory, transmitter and reception
Device, in which: the transmitter is used to send signal with to access point or other first equipment, and the receiver is for receiving access
The signal that point or other first equipment are sent, the memory are used to store the realization of the method for transmitting signals of second aspect description
Code, the processor is for executing the program code stored in the memory, i.e. execution second aspect or second aspect
Any one provided signal transmission in the possible embodiment of possible embodiment, fourth aspect or fourth aspect
Method.Optionally, the access point of the 6th aspect can be chipset；Memory and processor can integrate in same chip
On, it can also be separately positioned on different chips.
7th aspect, this application provides a kind of access points, including multiple functional modules, for executing first party accordingly
Any one in the possible embodiment of face or the possible embodiment of first aspect, the third aspect or the third aspect is mentioned
The method of confession.
Eighth aspect, this application provides a kind of first equipment, including multiple functional modules, for executing second accordingly
Any one institute in the possible embodiment of aspect or the possible embodiment of second aspect, fourth aspect or fourth aspect
The method of offer.
9th aspect, this application provides a kind of communication system, the communication system include: access point, the first equipment and
Second equipment.Wherein, described access point can be the access point that the 5th aspect or the 7th aspect describe, and the first equipment can be the
Six aspects or the first equipment of eighth aspect description.
Tenth aspect, provides a kind of computer readable storage medium, and realization the is stored on the readable storage medium storing program for executing
On the one hand or the program code of the method for transmitting signals of third aspect description, the program code include operation first aspect or third
The method for transmitting signals of aspect description executes instruction.
On the one hand tenth, provides a kind of computer readable storage medium, realization is stored on the readable storage medium storing program for executing
The program code of second aspect or the method for transmitting signals of fourth aspect description, the program code include operation second aspect or the
The method for transmitting signals that four aspects describe executes instruction.
12nd aspect, provide a kind of computer program product comprising instruction makes when run on a computer
Obtain the method for transmitting signals that computer executes above-mentioned first aspect or third aspect description.
13rd aspect, provide a kind of computer program product comprising instruction makes when run on a computer
Obtain the method for transmitting signals that computer executes above-mentioned second aspect or fourth aspect description.
Implement the application, can be avoided the different equipment of bandwidth of operation and channel confliction occurs.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the application communication system；
Fig. 2 is the structural schematic diagram of Clear to Send frame provided by the present application；
Fig. 3 is the structural schematic diagram of transmission claim frame provided by the present application；
Fig. 4 is the schematic diagram of concealed nodes provided by the present application and non-concealed node；
Fig. 5-Fig. 7 is the flow diagram of method for transmitting signals provided by the present application；
Fig. 8 is a kind of structural schematic diagram of access point provided by the present application；
Fig. 9 is a kind of structural schematic diagram of first equipment provided by the present application；
Figure 10 is a kind of structural schematic diagram of second equipment provided by the present application；
Figure 11 is a kind of functional block diagram of access point and the first equipment provided by the present application；
Figure 12 is a kind of functional block diagram of access point and the first equipment provided by the present application.
Specific embodiment
The term that presently filed embodiment part uses is only used for explaining the specific embodiment of the application, rather than
It is intended to limit the application.
First introduce this application involves wireless communication system.The wireless communication system is WLAN (wireless
Local area networks, WLAN) communication system, it is communicated using WiFi.It include wireless access point in the wireless system
Equipment (access point, AP) different with bandwidth of operation.Here, the different equipment of bandwidth of operation can there are many, for example,
It may include work in wireless system in the IoT equipment of 2MHz or so, work in the WiFi equipment of 20MHz or so, may also include work
Make the equipment etc. in other bandwidth.
Wherein, IoT equipment may include the objects such as rfid device, infrared inductor, global positioning system, laser scanner
Networked devices, WiFi equipment may include smart phone (such as Android phone, iOS mobile phone), tablet computer, laptop,
Palm PC, mobile internet device (MID, mobile internet device), wearable device (such as smartwatch
(iwatch etc.), Intelligent bracelet etc.) or other can pass through the equipment of WiFi connection network.
Schematically illustrating referring to Fig. 1, Fig. 1 includes AP in wireless system, and, the different equipment of two kinds of bandwidth of operation
The scene of (WiFi equipment and IoT equipment).
As shown in Figure 1, wherein AP and cable network carry out data connection, and data connection function can be by hardware or software
It realizes.Access point can be used to receive data and can transmit data in internet, can also realize the basis of wireless network
Website and bridge function provide the range of higher wireless security and extended wireless network service.AP can be fat AP (can be only
Vertical work, itself can configuration of the complete independently to antenna, mode, certification, encryption, data forwarding, management and strategy), it can also be with
It is that thin AP (can not work independently, need to connect wireless controller, itself is achievable to antenna, mode and the configuration of encryption, but recognizes
Card, data forwarding, management and the configuration of strategy needs are realized by wireless controller), wherein the wireless controller, it can be with
It is interchanger, router or server etc..
As shown in Figure 1, wherein WiFi equipment, IoT equipment can be mobile, fixed or portable.
WiFi equipment is and to be worked in the bandwidth of 20MHz or so using 802.11 protocol families, can be individual calculus
Machine, mobile phone, personal digital assistant (personal digital assistant, PDA) or other WiFi equipments.IoT equipment work
Make in narrowband (such as 2MHz bandwidth), can be rfid device, infrared inductor, global positioning system, laser scanner
Or other IoT equipment.
In this application, the bandwidth of operation of IoT equipment and the bandwidth of operation of WiFi equipment partly or entirely weigh on frequency domain
It is folded.Optionally, the bandwidth of operation of IoT equipment is all covered on frequency domain by the bandwidth of operation of WiFi equipment.For example, IoT equipment
The start-stop frequency range of bandwidth of operation can be 0-2MHz, and the start-stop frequency of WiFi equipment bandwidth of operation can be 0-20MHz.It should manage
Solution, WiFi equipment and IoT equipment can also work in other bandwidth.For example, IoT equipment can also work in 1MHz, 16MHz
Deng, the application to this with no restriction.Simultaneously in the application, 2MHz is worked to lift in 20MHz, IoT equipment with WiFi equipment work
Example explanation.Communication system shown in FIG. 1 can be implemented as basic service set (basic service set, BSS) network, extension
Services set (extent service set, ESS) network etc..
Based on wireless communication system shown in FIG. 1, it can be carried out data between WiFi equipment and AP, IoT equipment and AP
Transmission.Wherein, AP is known as downlink data transmission to the process that WiFi equipment or IoT equipment send data, and WiFi equipment or IoT are set
The standby process for sending data to AP is known as transmitting uplink data.In wireless communication system shown in Fig. 1, believe without dedicated uplink
Road and down channel, any one equipment (AP, WiFi equipment or IoT equipment) require to seize channel when sending data.Due to
Channel confliction may occur when seizing channel, say in detail below in different bandwidth for WiFi equipment and the work of IoT equipment
It is bright.
Referring to Fig. 1, channel confliction may occur for when IoT equipment uplink data sending.
Wherein, due to WiFi equipment and IoT collaborative share channel, IoT equipment before uplink sends data (data) to AP,
It is first by the process of (carrier sense multiple access with collision avoidance, CSMA/CA)
Detect whether each channel is idle, some available bandwidth is the channel idle of 2MHz if detecting, starts to transmit data.
During IoT equipment uplink transmission data, if there is WiFi equipment to want using the channel overlap with above-mentioned 2MHz
The channel transmission data of 20MHz, then WiFi equipment detects present channel (i.e. the channel of the 20MHz) also by CSMA/CA process
It is whether idle.
Carrier wave detection (carrier sence, CS) or energy measuring can be used in WiFi equipment during CSMA/CA
(energy detection, ED) judges whether present channel is idle.But since WiFi equipment and the work of IoT equipment are different
In bandwidth, when WiFi equipment is using CS detection channel, the lead flag in IoT device data transmission frame can not be identified
(preamble), it cannot know that present channel is occupied by preamble, therefore, WiFi equipment can only be detected by ED
Signal energy is received, judges whether present channel is idle.By ED detect channel when, when detect energy be greater than threshold value (as-
62dB), determine that present channel is occupied.But it is low in energy consumption when IoT equipment uplink transmission data, it not can guarantee energy and be greater than threshold value,
And the detection accuracy of ED is lower, therefore, WiFi equipment may think that the present channel free time, and present channel is begun to use to send number
According to causing channel confliction.
Similar, in downlink transmission data, the channel that bandwidth is 2MHz can be used to send data to IoT equipment for AP.If
There is WiFi equipment to want the channel data using the 20MHz of the channel overlap with above-mentioned 2MHz, then WiFi equipment passes through energy
Amount detection judges whether channel is idle.But it is low in energy consumption when AP is to IoT equipment transmission data, it not can guarantee energy greater than threshold value, because
This, WiFi equipment may think that the present channel free time, starts to send data, causes channel confliction.
It is above-mentioned it is found that in downstream transmission data, since WiFi equipment and the work of IoT equipment are in different bandwidth,
All can not effectively be detected by way of CS or ED other side whether busy channel, so as to cause channel confliction.
In order to avoid when transmitting data channel confliction occurs for WiFi equipment and IoT equipment, the side for separating frequency range can be used
Formula allows WiFi equipment and IoT equipment are worked in different frequency ranges respectively.After separating frequency range, the working frequency range of two kinds of equipment is not
The mode that can be overlapped, but separate frequency range can not dynamically use frequency according to the data transfer demands in wireless network coverage
Spectrum, reduces frequency spectrum utilization rate.
This application provides a kind of method for transmitting signals, work is in different bandwidth in the communication range that AP can be made to cover
IoT equipment, WiFi equipment all receive channel for occupied advertised information, enable to the WiFi of work on different bandwidths
Equipment and IoT equipment fair competition channel, avoid channel confliction.
In this application, IoT equipment can be described as the first equipment, and WiFi equipment can be described as the second equipment.The work of first equipment
It can be described as the first bandwidth as bandwidth, the bandwidth of operation of the second equipment can be described as the second bandwidth.It is not limited to IoT equipment, WiFi equipment,
First equipment, the second equipment can also be other work in two kinds of equipment of different bandwidth.
Wherein, the first bandwidth and the second bandwidth are partly or entirely overlapped on frequency domain, and optionally, the first bandwidth is on frequency domain
It is all covered by the second bandwidth.The application part indicates the first bandwidth and the second bandwidth using for 2MHz and 20HMz respectively.
The method for transmitting signals of the application is based on transmission request (request to send, RTS)/clear to send (clear
To send, CTS) mechanism.The technical term that RTS/CTS mechanism is related to is described below in the application in order to facilitate understanding.
(1) interframe space (interframe space, IFS)
IFS is a kind of time standard, is that the time between next beginning for sending frame is arrived in the end of upper transmission frame
Gap is one section of enforced idle time period in WLAN on transmission medium.This application involves following two IFS:
1, most short interFrameGap (short interframe space, SIFS).SIFS is the shortest time section of interframe,
For being spaced the frame for needing to make an immediate response, the length of SIFS is 16us.When equipment has obtained the channel right to use and needs to hold
When continuous control channel is to guarantee to complete Frame switch, SIFS will use.Common control frame such as acknowledgement frame ACK, RTS frame, CTS frame
Etc. requiring using SIFS.
2, distributed collaboration function interframe space (DCF interframe space, DIFS).DCF is a kind of using carrier wave
The distributed control mode of passive listening, the length of DIFS are the summation of SIFS and two systems time slot, i.e. DIFS (34us)=
SIFS (16us)+2*slottime (9us).Equipment in DCF operating mode sends data frame and control using DIFS
Frame.
(2) network allocation vector (network allocation vector, NAV)
In the application, virtual carrier sensing in wireless network communication is used in MAC layer (media access control, MAC)
Method determines the occupancy situation of channel.
The NAV variable of each plant maintenance itself timely updates NAV according to the estimated holding time to channel, and will most
New NAV value is put into duration (duration) field of mac frame to be sent.One is carried in the duration field to hold
Continuous time, the equipment for sending the frame on a certain channel are noticed oneself to the every other equipment for monitoring the channel and are estimated
Complete the transmission time for all frames that a data transmission is used.
All other equipment for listening to the frame then according to the duration carried in the duration field in the frame more
The newly NAV value of itself, it is believed that " virtually " listens to the channel will be occupied in the time indicated by duration field.Institute
There are the other equipment for receiving the frame to start the timer that a time value is the time indicated by duration field, is counted
When, only just prepare busy channel when channel idle and timer are 0 and sends data.
(3) CTS-to-self mechanism
In CTS-to-self mechanism, when an equipment prepares using channel, more by CTS-to-self frame
The NAV value of new other equipment.
Referring to fig. 2, upper portion illustrates the general formats of radio frames in Fig. 2, it may include following sections: preamble
(lead flag), PLCP (physical layer protocol parameter), MAC (mac frame), userdata (user data), CRC (verification domain).
Lower part referring to fig. 2, it illustrates the specific formats of the corresponding part MAC of general CTS frame.Wherein, Frame
Control field is frame control domain, and for Duration field for storing the duration, RA field is used to store the purpose of the frame
MAC Address, TA field are used to store the MAC Address for the website for sending the frame, and EXT is reserved extension field, and FCS field is verification
Domain.
CTS-to-self frame is considered as one of CTS frame, and RA field is set as sending the CTS-to-self
The MAC Address of the equipment of frame, Duration explanation of field channel is by occupied time.Other are all to listen to the CTS-
The other equipment of to-self frame update the NAV value of oneself with this.
(4) RTS/CTS mechanism
RTS/CTS mechanism is equivalent to a kind of Handshake Protocol, realizes by access point AP, to guarantee all wireless devices all
Channel be can receive by occupied advertised information.
In RTS/CTS mechanism, the equipment that send data sends the RTS frame that busy channel is requested, RTS frame to AP first
In contain channel i.e. for occupied Duration Information.All equipment that can listen to the RTS frame all can be when this continues
It is interior to be kept out of the way, that is, it is not take up channel.AP is responded after receiving RTS to whole network broadcast CTS frame.Send data
Equipment could use channel transmission data after receiving CTS.
For example, A sends RTS frame to B, show that A will send several data to B；After B receives RTS frame, Xiang Suoyou website
CTS frame is issued, shows to be ready for ready, A can send data, remaining website cannot temporarily send data；Then, A is sent to B
Data after B has received data, i.e., broadcast ACK acknowledgement frame to all websites, and all websites equality can listen to again, compete letter
Road.
The frame structure of RTS and CTS are introduced separately below.
1, the frame structure of RTS
Referring to Fig. 3, upper portion illustrates the general formats of radio frames in Fig. 3, it may include following sections: preamble
(lead flag), PLCP (physical layer protocol parameter), MAC, user data (user data), CRC (verification domain).
Referring to the middle section Fig. 3, it illustrates the specific structures of the corresponding part MAC of general RTS frame.Wherein, Frame
Control field is frame control domain, and for Duration field for storing the duration, RA field is used to store the purpose of the frame
MAC Address, TA field are used to store the MAC Address for the website for sending the frame, and EXT is reserved extension field, and FCS field is verification
Domain.
Wherein, the format of frame control domain (Frame Control) is as shown, To DS and From DS field shows the frame
Sending direction；Protocol Version is protocol version；Type is type field, and Subtype is subtype field, type field and
Subtype field indicates collectively out that the type of RTS frame is control frame；More Frag illustrates the case where frame is segmented, if also
Other frames；Retry is to retransmit domain, the re-transmission for frame；Powermanage is energy management domain, and More Data indicates whether
Receiving station is sent to there are one data frame；Whether Protected Frame designation date content is encrypted；Order is
Long frame fragment sequence number domain.
It is intelligible, it since RTS frame is control frame, and is short frame, To DS, From DS, More in frame control domain
Frag, Retry, More Data, Protected Frame, Order field in RTS frame all without indicative significance, in Fig. 3
Indicate that it does not have indicative significance by mark (0).
Specifically, the value of Duration field (unit is us) is used in transmission primaries data frame to be sent or management frame
All frames transmission time, it is true to transmit+one ACK of+one CTS frame of data frame or management frame to be sent under normal conditions
Recognize the time of+three SIFS frame periods of frame, if the result that Duration is calculated is not integer, carry is integer.Such as
It is 251us and 248us that 250.1us and 2413.7us, which can distinguish carry,.
2, the frame structure of CTS
Referring to fig. 2, CTS frame structure is identical with CTS-to-self frame structure, the difference is that, the content of RA field
For the content in the TA field in RTS frame corresponding with the CTS frame.Under normal conditions, the value of Duration field and the CTS frame
The value of Duration field in corresponding RTS frame cuts the time of transmission+one SIFS of the CTS frame.If Duration is counted
The result of calculation is not integer, then carry is integer.
(5) coverage area of access point
Specifically, the coverage area of access point is the coverage for the signal that access point issues.
In this application, access point can work in a variety of different bandwidth.When access point is sent using a certain bandwidth
When signal, the equipment equally to work in the bandwidth in coverage area can receive the signal.For example, when access point uses the
When one bandwidth sends signal, first equipment of the work in the first bandwidth can receive the signal in coverage area.
Intelligible, the coverage area of access point is not equal to the compass of competency of access point.In access point compass of competency
Equipment is all associated with the access point, and the equipment in access point coverage area is not necessarily associated with the access point.
(6) website and non-concealed website are hidden
In the application, any one the first equipment has a coverage area of itself, the coverage area of the first equipment be this
The coverage for the signal that one equipment issues.Other first equipment and first equipment within the coverage area of the first equipment
Non-concealed website each other, other first equipment except the coverage area of the first equipment and first equipment non-concealed station each other
Point.
It can be found in Fig. 4, the exemplary relation schematic diagram given between three the first equipment of Fig. 4, A, B, C work
One bandwidth, the coverage area of each first equipment of ellipse representation.
Wherein, A, B hide website each other.A, B is not in the coverage area of other side, and when A sends signal, B can not be detectd
Hear the signal；When B sends signal, A can not also listen to the signal.
Wherein, A, C non-concealed website each other.A, C is in the coverage area of other side, and when A sends signal, C can be detectd
Hear the signal；When C sends signal, A can also listen to the signal.
The method for transmitting signals of the application is introduced below by several embodiments.
(1) embodiment 1
In embodiment 1, the first equipment uplink transmits data to access point.Wherein, the first equipment is reserved by fourth signal
Channel, fourth signal are realized in the form of RTS frame.
Referring to Fig. 5, Fig. 5 is the process that the first equipment (IoT equipment) uplink that embodiment 1 provides transmits data to access point
Schematic diagram.The present embodiment may include following steps:
S101, the first equipment send fourth signal to access point by the first bandwidth, and fourth signal is used for reserve channel.
In step S101, send fourth signal the first equipment be communication system in multiple first equipment in, need and
Some first equipment of access point progress data interaction.In order to more clearly describe the present embodiment, the present embodiment is subsequent to be mentioned
The first equipment be send fourth signal the first equipment.
In the present embodiment, the effect of fourth signal is reserve channel.
Specifically, sent since the fourth signal is the first equipment by the first bandwidth, it works in the first bandwidth
Every other first equipment in and other first equipment of the first equipment non-concealed website each other can listen to the 4th letter
Number, and keep silent whithin a period of time, it is not take up channel.That is, to indicate above-mentioned and the first equipment non-each other hidden for fourth signal
Other first equipment of hiding website are not take up channel, send data booking channel for the first equipment.
Wherein, fourth signal may include the instruction information of the 4th duration, and the 4th duration was fourth signal reservation
The time of channel, i.e. fourth signal indicate that other first equipment of above-mentioned and the first equipment non-concealed website each other keep silent
Duration.
Wherein, in the present embodiment, fourth signal is the initial frame in whole flow process, when the 4th in fourth signal continues
Between specific value be no more than send opportunity limitation time (TXOPlimit), preset maximum time period be IEEE802.11 agreement
Defined maximum channel occupies duration.
Optionally, the value of the 4th duration has received fourth signal more than or equal to access point and has received to access point
The time between data that first equipment is sent, it is ensured that during the first equipment sends data to access point and the first equipment is mutual
Channel is not take up for other first equipment of non-concealed website.
It is above-mentioned it is found that the first equipment enabled to by the fourth signal that the first bandwidth is sent it is non-each other hidden with the first equipment
Other first equipment of hiding website are not take up channel within the 4th duration.
S102, access point send the first signal to the first equipment by the first bandwidth, send the second letter by the second bandwidth
Number give the second equipment.
In the present embodiment, the first signal is, in response to fourth signal, to be sent to first after access point receives fourth signal
The return information of equipment, the effect of the first signal are reserve channels.
Specifically, sent since first signal is access point by the first bandwidth, in access point coverage area
Work can listen to the first signal in all devices of the first bandwidth.Also, after listening to the first signal, access point covering
Other first equipment in range besides the first device keep silent whithin a period of time, are not take up channel.That is, the first letter
Other first equipment in number above-mentioned access point coverage area of instruction besides the first device are not take up channel, are the first equipment
Send data booking channel.
Wherein, the first signal may include the instruction information of the first duration, and the first duration was the reservation of the first signal
Other first equipment in the time of channel, i.e. the first signal designation above-mentioned access point coverage area besides the first device are protected
Hold the silent duration.
Optionally, the value of the first duration has received the first signal more than or equal to the first equipment and has received to access point
The time between data that complete first equipment is sent, it is ensured that during the first equipment sends data to access point, access point covering
Other first equipment in range besides the first device are not take up channel.
The specific value of first duration is according to the 4th in the fourth signal that access point receives in step S101
What the duration determined, and it is related to access point transmission sequence, the mode of the first signal and the second signal in step S102, it can
Referring to subsequent associated description.
Intelligible, other first equipment and the first equipment in access point coverage area in addition to the first equipment are non-each other
Other first equipment of website are hidden, the two may be identical, it is also possible to which different, the application is with no restrictions.
In the present embodiment, the effect of second signal is to indicate that the second equipment in access point coverage area keeps silent.
Specifically, sent since second signal is access point by the second bandwidth, in access point coverage area
All second equipment can listen to second signal, and keep silent whithin a period of time, be not take up channel.That is, the second letter
The second equipment in number instruction access point coverage area is not take up channel, sends data booking channel for first equipment.
Wherein, second signal may include the instruction information of the second duration, and the second duration was second signal reservation
The time of channel, i.e. second signal indicate that the second equipment in above-mentioned access point coverage area is kept for the silent duration.
Optionally, the value of the second duration has received the second signal more than or equal to the second equipment and has connect to access point
Harvest the time between the data of the first equipment transmission, it is ensured that during the first equipment sends data to access point, access point covers
The second equipment within the scope of lid is not take up channel.
The value of second duration is continued according to the 4th in the fourth signal that access point receives in step S101
What the time determined, and it is related to access point transmission sequence, the mode of the first signal and the second signal in step S102, it can refer to
Subsequent associated description.
S103, the first equipment send data to access point by the first bandwidth.
In the present embodiment, the first equipment is sent after fourth signal by the first bandwidth and the first equipment non-concealed station each other
Other first equipment of point keep silent within the 4th duration；After access point sends the first signal by the first bandwidth, connect
Other first equipment in access point coverage area in addition to the first equipment keep silent within the first duration；Access point passes through
After second bandwidth sends second signal, the second equipment in access point coverage area keeps silent within the second duration.The
It first is set during one equipment sends data to access point by the first bandwidth with other of the first equipment non-concealed website each other
Second equipment standby, in access point coverage area will not busy channel, avoid channel confliction.
Intelligible, embodiment 1 illustrates only in communication system that there are equipment (the first equipment that two kinds of bandwidth of operation are different
With the second equipment) scene, in the specific implementation, if there are when the different equipment of a variety of bandwidth of operation in communication system, this implementation
Example is equally applicable.
The following detailed description of referred in embodiment 1 fourth signal, the first signal, second signal.
1. fourth signal
(1) fourth signal is embodied as RTS frame
When fourth signal is embodied as RTS frame, TA field therein is arranged to the MAC Address of the first equipment, RA field quilt
It is set as the MAC Address of access point, indicates that the frame is sent from the first equipment to access point.
When fourth signal is embodied as RTS frame, Duration field therein indicated for the 4th duration.
In a specific embodiment, the value of Duration field can be with are as follows: sends time+transmission the of the first signal
Interval time between the time of binary signal+transmission data time+signal.Wherein, the first signal and the second signal can refer to
Subsequent associated description.Further, when the data that the first signal and the second signal are realized as CTS frame, the first equipment is sent are real
When being now data frame, the value of the Duration field in fourth signal (RTS frame) can be with are as follows: the first signal (CTS frame)+the second
Signal (CTS frame)++ n interframe spaces of data frame+ACK frame to be sent time.
Wherein, interframe space can be different in different scenes, can be SIFS, DIFS etc., the application is with no restrictions.
Whether the value of n according to the quantity of frame and can have interframe space to determine, for example, must have interframe space between two frames,
And in the case where data frame to be sent only one (corresponding ACK frame also only one), the value of n can be 4；In access point
Be sent to the CTS frame of the first equipment and be sent to the second equipment CTS frame between there is no an interframe space, and data frame to be sent is only
In the case where having one, the value of n can be 3.
(2) fourth signal realizes the detailed process of reserve channel
Fourth signal realizes the detailed process of reserve channel, i.e., first sets with other of the first equipment non-concealed website each other
After receiving fourth signal, silent concrete operations are kept.
In the present embodiment, after the first equipment sends fourth signal by the first bandwidth and the first equipment is non-concealed each other
Other first equipment of website can listen to fourth signal, and extract the 4th duration in fourth signal.Specifically, working as
When fourth signal is embodied as RTS frame and other first equipment of the first equipment non-concealed website each other can extract it is therein
Duration field, to know for the 4th duration.
The NAV value of itself can be updated to the 4th and continues by other first equipment of non-concealed website each other with the first equipment
Time starts the timer that a time is itself NAV value and countdown, and when timer is 0 and the first equipment is non-each other hidden
Other first equipment for hiding website just can busy channel transmission data.That is, with the first equipment each other non-concealed website other
After one equipment listens to fourth signal, all keep silent within the 4th duration, will not busy channel, avoid and the first equipment
Channel confliction occurs.
Optionally, when other first equipment with the first equipment non-concealed website each other are held according to the 4th in fourth signal
After the NAV value of itself is arranged in the continuous time, if not receiving the first signal of access point transmission after an interframe space
If, then after having listened to fourth signal, a time-out time (timeout) is waited, which is and the first equipment is mutual
For non-concealed website other first equipment listened to fourth signal to the first equipment to access point send data between time.
When access point first sends the first signal, when retransmiting second signal, first signal of time-out time=transmission when
Between+send second signal time+signal between interval time.When the first signal and the second signal are realized as CTS frame,
When the data that one equipment is sent are embodied as data frame, the time-out time=the first signal (CTS frame)+second signal (CTS frame)+
ARxPHYStartDelay+2 aSlotTime+ interframe space.Between the quantity of interframe space and the first signal, second signal
Whether there is interframe space related.When there is interframe space between the first signal and the second signal, the quantity of interframe space is 3；When
When between the first signal and the second signal either with or without interframe space, the quantity of interframe space is 2.Wherein,
ARXPHYStartDelay be from PPDU reach receiving station antenna at the beginning of to generate PHY-
The delay time of RXSTART.indication primitive, specific time span are not in the WLAN communication system of different systems
With.When a length of 9 microsecond of aSlotTime.
After waiting time-out time, if can be listened to other first equipment of the first equipment non-concealed website each other
The data that one equipment is sent to access point.At this point, maintaining itself with other first equipment of the first equipment non-concealed website each other
NAV value, until the first device end send data just start competitive channel.
After waiting time-out time, if not listening to other first equipment of the first equipment non-concealed website each other
The data that one equipment is sent to access point.Although illustrating the first device request channel reservation, actually and the channel is not used.
It is updated at this point, ignoring NAV caused by fourth signal with other first equipment of the first equipment non-concealed website each other.
It is above-mentioned it is found that the first equipment enabled to by the fourth signal that the first bandwidth is sent it is non-each other hidden with the first equipment
Other first equipment of hiding website are not take up channel within the 4th duration, avoid that channel confliction occurs with the first equipment.
2. the first signal
(1) first signal is embodied as CTS frame
When first signal is embodied as CTS frame, RA field therein is arranged to the MAC Address of the first equipment.It is intelligible,
When fourth signal is embodied as RTS frame, access point can obtain the MAC Address of the first equipment from the TA field in the RTS frame, and
The MAC Address for the first equipment that will acquire is put into the RA field of the first signal (CTS frame).
When first signal realizes CTS frame, Duration field therein indicated for the first duration.Duration field
Value is related to the 4th duration, the sequence of access point transmission the first signal and the second signal and mode in step S102, leads to
Cross following two situation explanation.
The first situation, access point first send the first signal, send second signal afterwards.The value of Duration field can be with
The time for sending first signal is subtracted for the 4th duration.
In a specific embodiment, the value of Duration field can be with are as follows: sends time+transmission of second signal
Interval time between the time of data+signal.Further, when the number that second signal is embodied as CTS frame, the first equipment is sent
When according to being embodied as data frame, the value of the Duration field in the first signal (CTS frame) can be with are as follows: and second signal (CTS frame)+
The time of data frame+ACK frame+n-1 to be sent interframe spaces.The value of interframe space and n can refer to associated description above.
Second situation, access point first send second signal, rear to send the first signal.The value of Duration field can be with
The time for sending the first signal and the second signal is subtracted for the 4th duration.
In a specific embodiment, the value of Duration field can be with are as follows: sends between time+signal of data
Interval time.Further, when the data that second signal is embodied as CTS frame, the first equipment is sent are embodied as data frame, the
The value of Duration field in one signal (CTS frame) can be with are as follows: data frame+ACK frame+n-2 to be sent interframe spaces
Time.The value of interframe space and n can refer to associated description above.
The detailed process of (2) first signals realization reserve channel
After access point sends the first signal by the first bandwidth, work is in the first bandwidth in access point coverage area
Equipment can listen to the first signal, and judge whether first signal is intended for oneself according to the RA field in the first signal
's.When the first signal is not destined to oneself, the NAV value of itself is arranged according to the first duration for equipment.
That is, it is to send that other first equipment in access point coverage area in addition to the first equipment, which can determine whether first signal not,
To oneself, and extract the first signal in the first duration.Specifically, when the first signal is embodied as CTS frame, access point
Other first equipment in coverage area in addition to the first equipment can extract duration field therein, with know first continue when
Between.
Other first equipment in access point coverage area in addition to the first equipment the NAV value of itself can be updated to this first
Duration starts the timer that a time is itself NAV value and countdown, when timer is 0, access point coverage area
Interior other first equipment in addition to the first equipment just can busy channel transmission data.That is, except first sets in access point coverage area
After other standby outer first equipment have listened to the first signal, all keep silent within the first duration, will not busy channel, keep away
Exempt from that channel confliction occurs with the first equipment.
It is put by above-mentioned (2) it is found that access point enables to access point to cover by the first signal that the first bandwidth is sent
Other first equipment within the scope of lid in addition to the first equipment are not take up channel within the first duration, avoid that channel punching occurs
It is prominent.
3. second signal
In the present embodiment, in step S102, access point can execute under the instruction of the first equipment to be sent out by the second bandwidth
The operation for sending second signal has following two indicating mode.
The first, is indicated by the flag bit in fourth signal.
Specifically, when fourth signal is embodied as RTS frame, using existing field extension flag position, when flag bit takes
When one value, it may be used to indicate access point and send second signal.Referring to Fig. 3, can use does not have the field of indicative significance in RTS frame
As flag bit, the reserved extension field in RTS frame also can use as flag bit.For example, 1 can be used in reserved extension field
A bit is as flag bit, when the flag bit takes 1, may be used to indicate access point and sends second signal.Wherein, the first value can
With pre-defined.
Second, pass through the 5th signal designation.
Specifically, access point is sending the first signal to the first equipment by the first bandwidth, the first equipment hair is being received
After the 5th signal sent, then by the second bandwidth transmission second signal to the second equipment.Wherein, the 5th signal is used to indicate access
Point sends second signal.
Wherein, the application does not limit the way of realization of the 5th signal.Optionally, the 5th signal can be realized as CTS-POLL
Frame.
In such a way that the first equipment sends the 5th signal, instruction access point sends second signal by the second bandwidth, can
So that information exchange process is more complete.
(1) second signal is embodied as CTS frame
When second signal is embodied as CTS frame, there are two types of set-up modes for RA field therein.The first, RA field therein
It can be set to the MAC Address of access point, second signal is embodied as the CTS-to-self frame in CTS frame at this time；Second
Kind, RA field therein can be set to empty MAC Address MAC Address (none) or be not present, and second signal is real at this time
It is now common CTS frame.RA field is set by above two mode, access point is with not having to the MAC for knowing all second equipment
Location, all second equipment in access point coverage area can also listen to the second signal.
When first signal realizes CTS frame, Duration field therein indicated for the second duration.Duration field
Value is related to the 4th duration, the sequence of access point transmission the first signal and the second signal and mode in step S102, leads to
Cross following two situation explanation.
The first situation, access point first send the first signal, send second signal afterwards.The value of Duration field can be with
The time for sending the first signal and the second signal is subtracted for the 4th duration.
In a specific embodiment, the value of Duration field can be with are as follows: sends between time+signal of data
Interval time.Further, when the data that the first signal is embodied as CTS frame, the first equipment is sent are embodied as data frame, the
The value of Duration field in binary signal (CTS frame) can be with are as follows: data frame+ACK frame+n-2 to be sent interframe spaces
Time.The value of interframe space and n can refer to associated description above.
Second situation, access point first send second signal, rear to send the first signal.The value of Duration field can be with
The time for sending the second signal is subtracted for the 4th duration.
In a specific embodiment, the value of Duration field can be with are as follows: sends time+transmission of the first signal
Interval time between the time of data+signal.Further, when the number that the first signal is embodied as CTS frame, the first equipment is sent
When according to being embodied as data frame, the value of the Duration field in second signal (CTS frame) can be with are as follows: and the first signal (CTS frame)+
The time of data frame+ACK frame+n-1 to be sent interframe spaces.The value of interframe space and n can refer to associated description above.
(2) second signal indicates that the second equipment keeps silent detailed process
In the present embodiment, access point by the second bandwidth send second signal after, in access point coverage area second
Equipment can listen to second signal, and extract the second duration in second signal.Specifically, when second signal is realized
When for CTS frame, the second equipment in access point coverage area can extract duration field therein, with know second continue when
Between.
The NAV value of itself can be updated to second duration, starting one by the second equipment in access point coverage area
A time is the timer of itself NAV value and countdown, and when timer is 0, the second equipment in access point coverage area is
It can busy channel transmission data.That is, after the second equipment in access point coverage area has listened to second signal, when second continues
In all keep silent, will not busy channel, avoid and channel confliction occur for the first equipment.
By above-mentioned 3rd point it is found that access point enables to access point to cover by the second signal that the second bandwidth is sent
The second equipment in range is not take up channel within the second duration, avoids that channel confliction occurs.
4. the transmission sequence and sending method of the first signal and second signal
The transmission sequence of the first signal and the second signal and sending method may include following several in the application:
(1) access point passes through the first bandwidth the first signal of transmission to the first equipment first, is then sent by the second bandwidth
Second signal gives the second equipment.
(2) access point passes through the second bandwidth transmission second signal to the second equipment first, is then sent by the first bandwidth
First signal gives the first equipment.
Specifically, in the first and second situation, when the first signal and the second signal are realized as CTS frame, the
It may include interframe space between one signal and second signal, can not also include interframe space.When the first signal and second are believed
When not including interframe space between number, reduces the time of information exchange, efficiency can be improved.
(3) when the first signal and the second signal are realized as CTS frame, the first signal is divided into two parts: leading part
(preamble) and frame main body (part in radio frames in addition to preamble), leading part is transmitted in the second signal
Before, frame main body is transmitted in after the second signal.
Specifically, sending leading part first, the first equipment may make to receive access point as early as possible for third signal
It responds, accelerates response speed.
Intelligible, under above-mentioned several transmission sequences and sending method, in the first signal the first duration, the second letter
The value of the second duration in number is different, can refer to the associated description previously for the first signal, second signal.
5. the specific opportunity that the first equipment sends data to access point
In the present embodiment, the first equipment waits for a period of time again after the first signal for receiving access point transmission to connecing
Access point sends data.It is illustrated by following two situation:
(1) access point first sends the first signal, retransmits second signal.
In this case, it after the first equipment sends fourth signal, after waiting 1 interframe space, can receive to the first letter
Number.After first equipment receives the first signal, that waits for a period of time is rear to access point transmission data.When the first signal and second
When signal is embodied as CTS frame and has interframe space between the two, waiting time=2 interframe space (can be SIFS)+the
Binary signal (CTS frame)；When the first signal and the second signal are embodied as CTS frame and do not have interframe space between the two, the waiting
Time=1 interframe space (can be SIFS)+second signal (CTS frame)；
(2) access point first sends second signal, retransmits the first signal.
In this case, after the first equipment sends fourth signal, 2 interframe space+second signals (CTS frame) are waited
After time, it can receive to the first signal.After first equipment receives the first signal, that waits for a period of time is rear to access point transmission
Data, waiting time=1 interframe space (can be SIFS).
(2) embodiment 2
In embodiment 2, the first equipment uplink transmits data to access point.Wherein, the first equipment is reserved by fourth signal
Channel.
Embodiment 2 and embodiment 1 the difference is that, fourth signal be embodied as quiet signal (quiet signal,
QS)。
In embodiment 2, QS can carry different information, when the information difference that QS is carried, the first signal and the second letter
The value of each field is different in number.
Likewise, reference can be made to flow diagram shown in fig. 5.The present embodiment may include following steps:
S101, the first equipment send fourth signal to access point by the first bandwidth, and fourth signal is used for reserve channel.
The first equipment of fourth signal is sent in step S101 to need and connecing in multiple first equipment in communication system
Some first equipment of access point progress data interaction.
In order to more clearly describe the present embodiment, subsequent the first equipment mentioned of the present embodiment is to send fourth signal
First equipment.
In the present embodiment, the effect of fourth signal is reserve channel.
Specifically, sent since the fourth signal is the first equipment by the first bandwidth, it works in the first bandwidth
Every other first equipment in and other first equipment of the first equipment non-concealed website each other can listen to the 4th letter
Number, and keep silent whithin a period of time, it is not take up channel.That is, to indicate above-mentioned and the first equipment non-each other hidden for fourth signal
Other first equipment of hiding website are not take up channel, send data booking channel for the first equipment.
Wherein, fourth signal may include the instruction information of the 4th duration, it is also possible to include the 4th lasting
The instruction information of time, can refer to the associated description subsequently with respect to fourth signal in the present embodiment.When including the in fourth signal
When the instruction information of four duration, the 4th duration was the time of fourth signal reserve channel, i.e., in fourth signal instruction
It states and is kept for the silent duration with other first equipment of the first equipment non-concealed website each other.Wherein, the 4th duration
Specific value be it is identical in the first equipment and embodiment 1, can refer to associated description.
It is above-mentioned it is found that the first equipment enabled to by the fourth signal that the first bandwidth is sent it is non-each other hidden with the first equipment
Other first equipment of hiding website are not take up channel within the 4th duration.
S102, access point send the first signal to the first equipment by the first bandwidth, send the second letter by the second bandwidth
Number give the second equipment.
Specifically, access point after receiving the fourth signal in step S101, judges basic clothes belonging to the first equipment
Whether business set identifier is identical with the basic service set identification of access point itself.Wherein, basic service set mark belonging to the first equipment
Knowledge can be indicated by above-mentioned fourth signal, can refer to the associated description subsequently with respect to fourth signal in the present embodiment.
The identical situation of the basic service set identification of the basic service set identification belonging to the first equipment and access point itself
Under, access point then passes through the first bandwidth and sends the first signal, sends second signal by the second bandwidth.
In the present embodiment, the first signal may include the instruction information of the first duration, and second signal may include second holding
The instruction information of continuous time.Wherein, the effect of the first signal, the effect of the first duration, the effect of second signal, second are held
It is identical in step S102 in the effect and embodiment 1 of continuous time, it can refer to associated description, this will not be repeated here.
S103, the first equipment send data to access point by the first bandwidth.
In the present embodiment, the first equipment is sent after fourth signal by the first bandwidth and the first equipment non-concealed station each other
Other first equipment of point keep silent whithin a period of time；After access point sends the first signal by the first bandwidth, access point
Other first equipment in coverage area in addition to the first equipment keep silent within the first duration；Access point passes through second
After bandwidth sends second signal, the second equipment in access point coverage area keeps silent within the second duration.At this point, the
One equipment sends data to access point by the first bandwidth, other equipment will not busy channel, avoid channel confliction.
The following detailed description of referred in embodiment 2 fourth signal, the first signal, second signal.
1. fourth signal
(1) information of fourth signal instruction
In the present embodiment, the information of fourth signal instruction has following several situations.
A, fourth signal indicates basic service set identification (BSS color) belonging to the first equipment.
Intelligible, the range of transmission that such case is more applicable for the first equipment not only includes belonging to first equipment
Access point further includes the scene of other access points.Basic service set identification belonging to the first equipment is indicated in fourth signal, it can
So that the multiple access points for receiving or listening to fourth signal confirm whether the fourth signal is intended for oneself.
B, fourth signal indicates at least one of mark or the 4th duration of the first equipment.
Wherein, the mark of the first equipment can be complete mark, be also possible to portion identification, the application is without limitation.
Wherein, identical in the definition of the 4th duration and value and embodiment 1, it can refer to associated description, do not go to live in the household of one's in-laws on getting married herein
It states.
Intelligible, the range of transmission that such case is more applicable for the first equipment only includes connecing belonging to first equipment
The scene of access point.
C, fourth signal indicates basic service set identification belonging to the first equipment, and, fourth signal indicates the first equipment
Mark or at least one of the 4th duration.
By above-mentioned a-c point it is found that may include the instruction information of the 4th duration in fourth signal, it is also possible to
It does not include the instruction information of the 4th duration.
When in fourth signal including the instruction information of the 4th duration and the first equipment non-concealed website each other
After other first equipment listen to fourth signal, being kept for the silent time was the 4th duration.
When not having in fourth signal includes the instruction information of the 4th duration and the first equipment non-concealed website each other
Other first equipment listen to fourth signal after, keep the silent time be can be the first preset time, this is first default
Time be greater than or equal to and the first equipment other first equipment of non-concealed website have been listened to fourth signal and have been connect to receiving point each other
Harvest the first equipment transmission data between time, guarantee and the first equipment each other non-concealed website other first equipment not
Meeting busy channel during the first equipment sends data.
(2) fourth signal is embodied as QS
Specifically, the form of QS is wave, the form for sending QS is smaller to interfering caused by the signal transmission in the second bandwidth.
In the present embodiment, QS can be specific frequency sine wave (sine wave), swept-frequency signal (frequency chirp) or busy
Any one in signal (busy tone).
When fourth signal is the sine wave of specific frequency, basic service set identification belonging to the first equipment, and, first
At least one of the mark of equipment or the 4th duration can be indicated by the frequency of sine wave.
When fourth signal is swept-frequency signal, basic service set identification belonging to the first equipment, and, the mark of the first equipment
At least one of knowledge or the 4th duration can pass through at least one of the initial frequency of swept-frequency signal or cutoff frequency
Instruction.
For example, the initial frequency of specific swept-frequency signal and the information of the corresponding instruction of cutoff frequency can be pre-defined.
For example, can define the information of corresponding instruction are as follows: belonging to the first equipment when the start-stop frequency of swept-frequency signal is respectively F1, F2
Basic service set identification is BSS color 1, the first equipment be identified as STA ID 1, the 4th duration was T1.
When fourth signal is busy signal, basic service set identification belonging to the first equipment, and, the mark of the first equipment
Or the 4th at least one of duration can be indicated by least one of the period of busy signal or changing rule.
(3) fourth signal realizes the detailed process of reserve channel
In the present embodiment, after the first equipment sends fourth signal by the first bandwidth and the first equipment is non-concealed each other
Other first equipment of website can listen to fourth signal.
If indicating other first equipment of the 4th duration and the first equipment non-concealed website each other in fourth signal
The NAV value of itself can be updated to for the 4th duration, start the timer that a time is itself NAV value and countdown,
Timer be 0 when and the first equipment each other non-concealed website other first equipment just can busy channel transmission data.That is,
After listening to fourth signal with other first equipment of the first equipment non-concealed website each other, all kept within the 4th duration
Silence, will not busy channel, avoid and the first equipment occur channel confliction.
If first being set in fourth signal without other of the 4th duration of instruction and the first equipment non-concealed website each other
Standby the first preset time that the NAV value of itself can be updated in above-mentioned (1) point, and start timer countdown.That is, with
After other first equipment of one equipment non-concealed website each other listen to fourth signal, all keep quiet in the first preset time
It is silent, will not busy channel, avoid and channel confliction occur for the first equipment.
Optionally, when itself is arranged according to fourth signal in other first equipment with the first equipment non-concealed website each other
After NAV value, a time-out time (timeout) is waited, the value of the time-out time and effect can refer to the 4th in embodiment 1
The associated description of signal.
2. the first signal
(1) first signal is embodied as CTS frame
First signal is embodied as the indicative significance and embodiment 1 for each field and each field for including when CTS frame
In it is identical.The difference is that the first signal is real in the fourth signal (QS) that access point receives when the information difference of instruction
When being now CTS frame, the value of each field is different, as follows:
A, when carrying mark (full identity or the portion identification) of the first equipment in fourth signal, the first signal (CTS
Frame) in RA field be arranged to the mark of the first equipment.
Specifically, equipment of the work in the first bandwidth in access point coverage area can listen to the first signal (CTS
Frame).Since the RA field in the first signal (CTS frame) is arranged to the mark of the first equipment, each equipment all extractable first
RA field in signal (CTS frame) then responds first signal (CTS frame) to access point and sends data if the mark of itself.
If not the mark of itself, then according to the NAV value of the first signal update itself.It is apparent that the first equipment responds the first signal
(CTS frame) sends data to access point, and interior other first equipment in addition to the first equipment of access point coverage area are according to the first letter
Number update the NAV value of itself.
B, when not having to carry the mark of the first equipment in fourth signal, the RA field in the first signal (CTS frame) has following
Two kinds of facilities.
The first situation, the RA field in the first signal (CTS frame) can be set to access point itself MAC Address,
It MAC Address (none) or the MAC Address that is not present that one empty.
Second situation, the RA field in the first signal (CTS frame) are arranged to the mark of the first equipment.Here, due to
Do not have to carry the mark of the first equipment in fourth signal, other information can be transmitted to notify the first equipment of access point in the first equipment
Mark.
C, when fourth signal indicated for four duration, the value of the duration field in the first signal (CTS frame) and
Duration field value in the first signal in embodiment 1 in step S102 is identical, can refer to associated description, does not go to live in the household of one's in-laws on getting married herein
It states.
D, when fourth signal did not indicate for four duration, duration field in the first signal (CTS frame) is taken
Value can be the second preset time, which has received the first signal more than or equal to the first equipment and connect to receiving point
The time between the data of the first equipment transmission is harvested, other for guaranteeing in access point coverage area in addition to the first equipment first are set
It is standby will not during the first equipment sends data busy channel.Optionally, the first signal is first sent in access point, retransmits second
In the case where signal, the relationship for the first preset time being mentioned in (1) in the second preset time and above-mentioned 1st fourth signal
Are as follows: the second preset time=first the-the first signal of preset time (CTS frame) time.
The detailed process of (2) first signals realization reserve channel
Specifically, the operation of (2) point and the first signal in embodiment 1 realize that the detailed process of reserve channel is identical,
That is, access point enables to other in access point coverage area in addition to the first equipment by the first signal that the first bandwidth is sent
First equipment is not take up channel within the first duration, avoids that channel confliction occurs.It can refer to the associated description of embodiment 1.
3. second signal
(1) second signal is embodied as CTS frame
When second signal is embodied as CTS frame, step S102 second signal is real in the setting and embodiment 1 of RA field therein
It is identical when being now CTS frame, it can refer to associated description.
When second signal is embodied as CTS frame, the value of duration field therein has following two situation:
The first, when indicating for four duration in the fourth signal that access point receives, duration field is taken
Value and step S102 second signal in embodiment 1 are embodied as identical when CTS frame, can refer to associated description.
Second, when indicating for four duration in the fourth signal that access point receives, duration field is taken
Value can be third preset time.Optionally, which has received second signal more than or equal to the second equipment and has arrived
Receiving point has received the time between the data of the first equipment transmission, guarantees that the second equipment will not send the data phase in the first equipment
Between busy channel.Optionally, when access point first sends the first signal, in the case where retransmiting second signal, third preset time
The relationship for the first preset time being mentioned in (1) in above-mentioned 1st fourth signal are as follows: third preset time=the first is default
When m- first signal (CTS frame)-second signal (CTS frame) time.
(2) second signal indicates that the second equipment keeps silent detailed process
Specifically, second signal indicates that second in access point coverage area sets in the operation and embodiment 1 of (2) point
The standby detailed process for keeping silence is identical, can refer to associated description.In the present embodiment, access point sent by the second bandwidth the
Binary signal enables to the second equipment in access point coverage area to be not take up channel within the second duration, avoids believing
Road conflict.
4. the transmission sequence and sending method of the first signal and second signal
In the present embodiment, identical in the transmission sequence and sending method and embodiment 1 of the first signal and the second signal, it can
Referring to associated description.
5. the specific opportunity that the first equipment sends data to access point
In the present embodiment, the first equipment is sent identical in the specific opportunity and embodiment 1 of data to access point, can refer to
Associated description.
(3) embodiment 3
In embodiment 3, access point downlink is to the first equipment transmission data.Wherein, access point by send the first signal and
Second signal carrys out reserve channel.
Referring to Fig. 6, embodiment 3 may include following steps:
S201, access point send the first signal to the first equipment by the first bandwidth.
In step S201, access point need to send data in communication system in multiple first equipment some first set
It is standby.In order to more clearly describe the present embodiment, subsequent the first equipment mentioned of the present embodiment is some first equipment.
In the present embodiment, the effect of the first signal is reserve channel.
Specifically, sent since first signal is access point by the first bandwidth, in access point coverage area
Equipment of all working in the first bandwidth can listen to the first signal, and judge whether first signal is intended for oneself
's.If being intended for oneself, the data that access point is sent are received after waiting for a period of time；If not it is sent to oneself,
Then keep silent according to the first signal.
Since the first signal is to be sent from access point to the first equipment, the first equipment is followed by waiting for a period of time
The data that access point is sent are received, reference can be made to step S203, interior other first equipment in addition to the first equipment of access point coverage area
Keep silent according to the first signal.That is, in the above-mentioned access point coverage area of the first signal designation in addition to the first equipment other the
One equipment is not take up channel, sends data booking channel to the first equipment for access point.
Wherein, the first signal may include the instruction information of the first duration, and the first duration was the reservation of the first signal
Other first equipment in the time of channel, i.e. the first signal designation above-mentioned access point coverage area in addition to the first equipment keep quiet
The silent duration.
Optionally, the value of the first duration has received the first signal more than or equal to the first equipment and has connect to the first equipment
Harvest the time between the data of access point transmission, it is ensured that during access point sends data to the first equipment, access point covering
Other first equipment in range in addition to the first equipment are not take up channel.The value and step S201-S202 of first duration
Middle access point sends the sequence of the first signal and the second signal, mode correlation, can refer to subsequent associated description.
In the present embodiment, if access point first sends the first signal, second signal is retransmited, then the first signal is entire
Initial frame in process, the specific value of the first duration in the first signal are no more than send opportunity and limit time (TXOP
Limit), preset maximum time period is that maximum channel as defined in agreement occupies duration.
It is above-mentioned it is found that access point is enabled in access point coverage area by the first signal that the first bandwidth is sent except the
Other first equipment outside one equipment are not take up channel within the first duration, avoid that channel confliction occurs.
S202, access point send second signal by the second bandwidth, and second signal is used to indicate the second equipment and keeps silent.
In the present embodiment, the effect of second signal is to indicate that the second equipment in access point coverage area keeps silent.
Specifically, sent since second signal is access point by the second bandwidth, in access point coverage area
All second equipment can listen to second signal, and keep silent whithin a period of time, be not take up channel.That is, the second letter
The second equipment in number instruction access point coverage area is not take up channel, sends data booking channel for first equipment.
Wherein, second signal may include the instruction information of the second duration, and the second duration was second signal reservation
The time of channel, i.e. second signal indicate that the second equipment in access point coverage area is kept for the silent duration.
Optionally, the value of the second duration has received the second signal to the first equipment more than or equal to the second equipment
The time between the data of access point transmission is received, it is ensured that during access point sends data to the first equipment, access point covers
The second equipment within the scope of lid is not take up channel.
In the present embodiment, if access point first sends the first signal, second signal is retransmited, then second signal is entire
Initial frame in process, the specific value of the second duration in second signal are no more than send opportunity and limit time (TXOP
Limit), preset maximum time period is that maximum channel as defined in agreement occupies duration.
Access point sends the first signal and the second signal in the specific value and step S201, S202 of second duration
Sequentially, mode is related, can refer to subsequent associated description.
Intelligible, the application does not limit the sequencing that step S201 and step S202 is executed.Access point sends first
The sequence and mode of signal and second signal can refer to the associated description in embodiment 1, and this will not be repeated here.
S203, access point send data to the first equipment by the first bandwidth.
Specifically, after access point sends the first signal by the first bandwidth, in access point coverage area in addition to the first equipment
Other first equipment keep silent within the first duration；After access point sends second signal by the second bandwidth, access
The second equipment in point coverage area keeps silent within the second duration.During access point sends data to the first equipment,
Other first equipment in addition to the first equipment, the second equipment in access point coverage area will not occupy in access point coverage area
Channel avoids channel confliction.
Intelligible, embodiment 3 illustrates only in communication system there are the scene of the different equipment of two kinds of bandwidth of operation, tool
During body is realized, if the present embodiment is equally applicable there are when a variety of bandwidth of operation different equipment in communication system.
The following detailed description of referred in embodiment 3 the first signal, second signal.
1. the first signal
(1) first signal is embodied as CTS frame
When first signal is embodied as CTS frame, RA field therein is arranged to the MAC Address of the first equipment.
When first signal realizes CTS frame, Duration field therein indicated for the first duration.Duration field
4th duration in value and step S201, S202, access point send the sequence and mode phase of the first signal and the second signal
It closes, is illustrated by following two situation.
The first situation, access point first send the first signal, send second signal afterwards.
In a specific embodiment, the value of Duration field can be with are as follows: sends time+transmission of second signal
Interval time between the time of data+signal.Further, when the number that second signal is embodied as CTS frame, the first equipment is sent
When according to being embodied as data frame, the value of the Duration field in the first signal (CTS frame) can be with are as follows: and second signal (CTS frame)+
The time of data frame+ACK frame+m to be sent interframe spaces.Wherein, interframe space can refer to associated description above, the value of m
According to the quantity of frame and whether there can be interframe space to determine.For example, must have interframe space between two frames, and pending
Send data frame in the case where only one, the value of m can be 3；There is no interframe space between the first signal and the second signal,
And data frame to be sent, in the case where only one, the value of m can be 2.
Second situation, access point first send second signal, rear to send the first signal.
In a specific embodiment, the value of Duration field can be with are as follows: the second duration subtracted transmission
The time of binary signal.Second duration can refer to the associated description subsequently with respect to second signal.
The detailed process of (2) first signals realization reserve channel
Other in the detailed process of first signal reserve channel, i.e. access point coverage area in addition to the first equipment first are set
After receiving the first signal, silent concrete operations are kept.
In the present embodiment, after access point sends the first signal by the first bandwidth, work exists in access point coverage area
Equipment in first bandwidth can listen to the first signal, and whether judge first signal according to the RA field in the first signal
It is intended for oneself.When the first signal is not destined to oneself, the NAV value of itself is arranged according to the first duration for equipment.
That is, it is to send that other first equipment in access point coverage area in addition to the first equipment, which can determine whether first signal not,
To oneself, and extract the first signal in the first duration.Specifically, when the first signal is embodied as CTS frame, access point
Other first equipment in coverage area in addition to the first equipment can extract duration field therein, with know first continue when
Between.
Other first equipment in access point coverage area in addition to the first equipment the NAV value of itself can be updated to this first
Duration starts the timer that a time is itself NAV value and countdown, when timer is 0, access point coverage area
Interior other first equipment in addition to the first equipment just can busy channel transmission data.That is, except first sets in access point coverage area
After other standby outer first equipment listen to the first signal, all keep silent within the first duration, will not busy channel, keep away
Exempt from that channel confliction occurs during access point sends data to the first equipment.
2. second signal
(1) second signal is embodied as CTS frame
When second signal is embodied as CTS frame, there are two types of set-up modes for RA field therein.The first, RA field therein
It can be set to the MAC Address of access point, second signal is embodied as the CTS-to-self frame in CTS frame at this time；Second
Kind, RA field therein can be set to empty MAC Address MAC Address (none) or be not present, and second signal is real at this time
It is now common CTS frame.RA field is set by above two mode, access point is with not having to the MAC for knowing all second equipment
Location, all second equipment in access point coverage area can also listen to the second signal.
When first signal realizes CTS frame, Duration field therein indicated for the second duration.Duration field
Value is related to the sequence of access point transmission the first signal and the second signal and mode in step S201, S202, passes through following two
Kind situation explanation.
The first situation, access point first send the first signal, send second signal afterwards.The value of Duration field can be with
The time for sending the second signal is subtracted for the first duration.
In a specific embodiment, the value of Duration field can be with are as follows: sends between time+signal of data
Interval time.Further, when the data that the first signal is embodied as CTS frame, the first equipment is sent are embodied as data frame, the
The value of Duration field in binary signal (CTS frame) can be with are as follows: data frame+ACK frame+m-1 to be sent interframe spaces
Time.The value of interframe space and m can refer to associated description above.
Second situation, access point first send second signal, rear to send the first signal.
In a specific embodiment, the value of Duration field can be with are as follows: sends time+transmission of the first signal
Interval time between the time of data+signal.Further, when the number that the first signal is embodied as CTS frame, the first equipment is sent
When according to being embodied as data frame, the value of the Duration field in second signal (CTS frame) can be with are as follows: and the first signal (CTS frame)+
The time of data frame+ACK frame+j to be sent interframe spaces.Wherein, interframe space can refer to associated description above, the value of j
It is determined according to the quantity of data frame to be sent.For example, must have interframe space between two frames, and data frame to be sent only has
In the case where one, the value of j can be 3；There is no interframe space, and data to be sent between the first signal and the second signal
For frame in the case where only one, the value of j can be 2.
(2) second signal indicates that the second equipment keeps silent concrete operations
Specifically, it is identical in the detailed process and embodiment 1 of second signal realization indicative function, it can refer to associated description.
3. the specific opportunity that access point sends data to the first equipment
In the present embodiment, the first equipment waits for a period of time again after the first signal for receiving access point transmission to connecing
Access point sends data.By following two situation, CTS frame is embodied as with the first signal and the second signal and has interframe between the two
Interval is illustrated:
(1) access point first sends the first signal, retransmits second signal.
In this case, after the first equipment receives the first signal, that waits for a period of time is rear to access point transmission number
According to waiting time=2 interframe space (can be SIFS)+second signal (CTS frame).
(2) access point first sends second signal, retransmits the first signal.
In this case, after the first equipment receives the first signal, that waits for a period of time is rear to access point transmission number
According to waiting time=1 interframe space (can be SIFS).
(4) embodiment 4
In embodiment 4, access point downlink is to the first equipment transmission data.Wherein, access point by send the first signal and
Second signal carrys out reserve channel, and the first equipment is by sending third signal reserve channel.
Referring to Fig. 7, embodiment 4 may include following steps:
S301, access point send the first signal to the first equipment by the first bandwidth, and the first signal is used for reserve channel.
In step S301, access point need to send data in communication system in multiple first equipment some first set
It is standby.In order to more clearly describe the present embodiment, subsequent the first equipment mentioned of the present embodiment is some first equipment.
In the present embodiment, the effect of the first signal is reserve channel.
Specifically, sent since first signal is access point by the first bandwidth, in access point coverage area
Work can listen to the first signal in all devices of the first bandwidth.Also, after listening to the first signal, access point covering
Other first equipment in range besides the first device keep silent whithin a period of time, are not take up channel.That is, the first letter
Other first equipment in number above-mentioned access point coverage area of instruction besides the first device are not take up channel, are the first equipment
Send data booking channel.
Wherein, the first signal may include the instruction information of the first duration, and the first duration was the reservation of the first signal
Other first equipment in the time of channel, i.e. the first signal designation above-mentioned access point coverage area besides the first device are protected
Hold the silent duration.
Wherein, in the present embodiment, the first signal is the initial frame in whole flow process, when first in the first signal continues
Between specific value be no more than send opportunity limitation time (TXOPlimit), preset maximum time period be agreement as defined in maximum
Channel occupancy duration.
Optionally, the value of the first duration has received the first signal more than or equal to the first equipment and has connect to the first equipment
Harvest the time between the data of access point transmission, it is ensured that during access point sends data to the first equipment, access point covering
Other first equipment in range besides the first device are not take up channel.
It is above-mentioned it is found that access point by the first signal that the first bandwidth is sent enable in access point coverage area in addition to
Other first equipment except first equipment are not take up channel within the first duration, avoid that channel confliction occurs.
S302, the first equipment send third signal to access point by the first bandwidth in response to the first signal.
In the present embodiment, third signal is after the first equipment receives the first signal, to be sent to and connect in response to the first signal
The return information of access point.
Optionally, since first signal is the first equipment by the transmission of the first bandwidth, and the first equipment is each other
Other first equipment of non-concealed website can listen to the first signal, and keep silent whithin a period of time, be not take up channel.
That is, third signal designation is above-mentioned and other first equipment of the first equipment non-concealed website each other are not take up channel, set for first
Preparation send data booking channel.
Wherein, third signal may include the instruction information of third duration.The third duration is greater than or equal to access
Point has received third signal and has received time between the data that access point is sent to the first equipment, it is ensured that in access point to first
During equipment sends data and other first equipment of the first equipment non-concealed website each other are not take up channel.
The specific value of third duration is in the first signal received according to the first equipment in step S301
What one duration determined, it can refer to the associated description subsequently with respect to third signal.
S303, access point send second signal to the second equipment by the second bandwidth, and second signal is used to indicate second and sets
It is standby to keep silent.
In the present embodiment, the effect of second signal is to indicate that the second equipment in access point coverage area keeps silent.
Specifically, sent since second signal is access point by the second bandwidth, in access point coverage area
All second equipment can listen to second signal, and keep silent whithin a period of time, be not take up channel.That is, the second letter
The second equipment in number instruction access point coverage area is not take up channel, sends data booking channel for first equipment.
Wherein, second signal may include the instruction information of the second duration, and the second duration was second signal reservation
The time of channel, i.e. second signal indicate that the second equipment in access point coverage area is kept for the silent duration.
Optionally, the value of the second duration has received the second signal to the first equipment more than or equal to the second equipment
The time between the data of access point transmission is received, it is ensured that during access point sends data to the first equipment, access point covers
The second equipment within the scope of lid is not take up channel.
The specific value of second duration is in the first signal received according to the first equipment in step S301
What one duration determined, it can refer to subsequent associated description.
S304, access point send data to the first equipment by the first bandwidth.
Specifically, access point after sending the first signal by the first bandwidth, may make in access point coverage area except the
Other first equipment outside one equipment keep silent within the first duration；Access point sends second signal by the second bandwidth
Afterwards, the second equipment in access point coverage area may make to keep silent within the second duration.It is set in access point to first
During preparation send data, in other first equipment, access point coverage area in access point coverage area in addition to the first equipment
Second equipment all will not busy channel, avoid channel confliction.
Intelligible, embodiment 4 illustrates only in communication system there are the scene of the different equipment of two kinds of bandwidth of operation, tool
During body is realized, if the present embodiment is equally applicable there are when a variety of bandwidth of operation different equipment in communication system.
The following detailed description of the first signal, the third signal, second signal referred in embodiment 4.
1. the first signal
(1) first signal is embodied as RTS frame
When first signal is embodied as RTS frame, TA field therein is arranged to the MAC Address of access point, and RA field is set
It is set to the MAC Address of the first equipment, indicates that the frame is sent from access point to the first equipment.
When first signal is embodied as RTS frame, Duration field therein indicated for the first duration.
In a specific embodiment, the value of Duration field can be with are as follows: sends time+transmission the of third signal
Interval time between the time of binary signal+transmission data time+signal.Wherein, third signal and second signal can refer to
The associated description of subsequent step S302-S303.
Further, when the data that third signal and second signal are realized as CTS frame, access point is sent are embodied as data
When frame, the value of the Duration field in the first signal (RTS frame) can be with are as follows: third signal (CTS frame)+second signal (CTS
Frame)+data frame+ACK frame+i to be sent interframe space time.
Wherein, interframe space can be different in different scenes, can be SIFS, DIFS etc., the application is with no restrictions.
The value of i can determine according to the quantity of frame, for example, data frame to be sent only one in the case where, the value of i can be 4.
The detailed process of (2) first signals realization reserve channel
In the present embodiment, after access point sends the first signal by the first bandwidth,
After access point sends the first signal by the first bandwidth, work is in the first bandwidth in access point coverage area
Equipment can listen to the first signal, and judge whether first signal is intended for oneself according to the RA field in the first signal
's.When the first signal is not destined to oneself, the NAV value of itself is arranged according to the first duration for equipment.
That is, it is to send that other first equipment in access point coverage area in addition to the first equipment, which can determine whether first signal not,
To oneself, and extract the first signal in the first duration.Specifically, when the first signal is embodied as RTS frame, access point
Other first equipment in coverage area in addition to the first equipment can extract duration field therein, with know first continue when
Between.
Other first equipment in access point coverage area in addition to the first equipment the NAV value of itself can be updated to this first
Duration starts the timer that a time is itself NAV value and countdown, when timer is 0, access point coverage area
Interior other first equipment in addition to the first equipment just can busy channel transmission data.That is, except first sets in access point coverage area
After other standby outer first equipment listen to the first signal, all keep silent within the first duration, will not busy channel, keep away
Exempt from and access that channel confliction occurs when sending data.
Optionally, when other first equipment in access point coverage area in addition to the first equipment are according in the first signal
After the NAV value of itself was arranged in one duration, if not receiving the of the first equipment response after an interframe space
If three signals, then a time-out time (timeout) is waited, which is that the first equipment is removed in access point coverage area
Other outer first equipment listened to the first signal to access point received the first equipment transmission data between time.It is optional
, the interval time between the time-out time=transmission third signal time+transmission second signal time+signal.When
When the data that three signals and second signal are realized as CTS frame, access point is sent are embodied as data frame, the time-out time=third
Signal (CTS frame)+second signal (CTS frame)+aRxPHYStartDelay+2 aSlotTime+3 interframe spaces.
After waiting time-out time, under normal circumstances, other in access point coverage area in addition to the first equipment first are set
It is standby to listen to the data that access point is sent to the first equipment.At this point, its in access point coverage area in addition to the first equipment
His the first equipment maintains the NAV value of itself, until the data that the first equipment has received access point transmission just start competitive channel.
After waiting time-out time, if other first equipment in access point coverage area in addition to the first equipment are not listened to
The data sent to access point to the first equipment.Although illustrating that access point requests channel reservation, actually and the letter is not used
Road.At this point, the NAV value of other first device clears itself in access point coverage area in addition to the first equipment, that is, by NAV value
It is set to 0, starts competitive channel.
2. third signal
(1) third signal is embodied as CTS frame.
When third signal is embodied as CTS frame, RA field therein is arranged to the MAC Address of access point.It is intelligible, when
When first signal is embodied as RTS frame, access point can obtain the MAC Address of access point from the TA field in the RTS frame, and will obtain
The MAC Address for the access point got is put into the RA field of third signal (CTS frame).
When third signal realizes CTS frame, Duration field therein indicates the third duration.Duration field
Value can subtract the time for sending the third signal for the first duration.
In a specific embodiment, third duration=transmission second signal time+transmission data time+letter
Interval time between number.
Further, when the data that second signal is embodied as CTS frame, access point is sent are embodied as data frame, third letter
The value of Duration field in number (CTS frame) can be with are as follows: second signal (CTS frame)+data frame+ACK frame to be sent+i-1
The time of a interframe space.The value of interframe space and i can refer to associated description above.
(2) third signal realizes the detailed process of reserve channel
Third signal realizes the detailed process of reserve channel, i.e., first sets with other of the first equipment non-concealed website each other
After receiving third signal, silent concrete operations are kept.
In the present embodiment, after the first equipment sends third signal by the first bandwidth and the first equipment is non-concealed each other
Other first equipment of website can listen to third signal, and extract the 4th duration in third signal.Specifically, working as
When third signal is embodied as CTS frame and other first equipment of the first equipment non-concealed website each other can extract it is therein
Duration field, to know the third duration.
The NAV value of itself can be updated to the third and continues by other first equipment of non-concealed website each other with the first equipment
Time starts the timer that a time is itself NAV value and countdown, and when timer is 0 and the first equipment is non-each other hidden
Other first equipment for hiding website just can busy channel transmission data.That is, with the first equipment each other non-concealed website other
After one equipment has listened to third signal, all keep silent within the third duration, will not busy channel, avoid and the first equipment
Channel confliction occurs.
3. second signal
(1) second signal is embodied as CTS frame
When second signal is embodied as CTS frame, there are two types of set-up modes for RA field therein.The first, RA field therein
It can be set to the MAC Address of access point, second signal is embodied as the CTS-to-self frame in CTS frame at this time；Second
Kind, RA field therein can be set to empty MAC Address MAC Address (none) or be not present, and second signal is real at this time
It is now common CTS frame.RA field is set by above two mode, access point is with not having to the MAC for knowing all second equipment
Location, all second equipment can also listen to the second signal.
When first signal realizes CTS frame, Duration field therein indicated for the second duration.Duration field
Value can subtract the time for sending third signal and the second signal for the first duration.
In a specific embodiment, the interval time between third duration=transmission data time+signal.
Further, the Duration when the data that access point is sent are embodied as data frame, in second signal (CTS frame)
The value of field can be with are as follows: the time of data frame+ACK frame+i-2 to be sent interframe spaces.The value of interframe space and i can
Referring to associated description above.
(2) second signal indicates that the second equipment keeps silent concrete operations
Specifically, it is identical in the detailed process and embodiment 1 of second signal realization indicative function, it can refer to associated description.
The foregoing detailed description data processing method of the application, for the ease of better implementing the above-mentioned side of the application
Correspondingly the relevant apparatus of the application is provided below in method.
The access point 10 of some embodiments of the present application offer is shown with reference to Fig. 8, Fig. 8.Access point 10 may be implemented into
Access point in Fig. 1.As shown in figure 8, access point 10 can include: communication interface 103, one or more access point processor 101,
Transmitter 107, receiver 109, coupler 111, antenna 113 and memory 105.These components can pass through bus or other sides
Formula connection, Fig. 8 by bus for being connected.Wherein:
Communication interface 103 can be used for access point 10 and other communication equipments, for example, WiFi equipment, IoT equipment or other connect
Access point and network are communicated.In the specific implementation, communication interface 103 can be network communication interface, such as LTE (4G) leads to
Letter interface, 5G or following communication interface, cellular network interface, WLAN interface newly eated dishes without rice or wine etc..Wireless communication interface is not limited to,
Access point 10 can be configured with wired communication interface (such as Ethernet interface) to support wire communication.
Antenna 113 can be used for the electromagnetic wave being converted into the electromagnetic energy in transmission line in free space, or will be freely empty
Between in electromagnetic wave be converted into the electromagnetic energy in transmission line.Coupler 111 can be used for messenger being divided into multichannel, distribute to multiple
Receiver 109.
Transmitter 107 can be used for carrying out transmitting processing to the signal that access point processor 101 exports, for setting to WiFi
Standby, IoT equipment or other access points emit signal.Receiver 109 can be used for carrying out receiving area to 113 received signal of antenna
Reason, for receiving the signal of WiFi equipment, IoT equipment or the transmitting of other access points.In some embodiments of the present application, transmitting
Device 107 and receiver 109 can regard a radio modem as.In access point 10, transmitter 107 and receiver 109
Quantity may each be one or more.
Memory 105 is coupled with access point processor 101, for storing various software programs and/or multiple groups instruction.Specifically
In realization, memory 105 may include the memory of high random access, and may also comprise nonvolatile memory, such as one
A or multiple disk storage equipments, flash memory device or other non-volatile solid-state memory devices.Memory 105 can store operation
System (following abbreviation systems), such as the embedded OSs such as uCOS, VxWorks, RTLinux.Memory 105 can also be deposited
Network communication program is stored up, which can be used for and one or more optional equipments, one or more terminal devices, and one
A or multiple access points are communicated.
In some embodiments of the present application, one or more embodiments that memory 105 can be used for storing the application are mentioned
Realization program of the method for transmitting signals of confession in 10 side of access point.The signal that one or more embodiments about the application provide
The realization of transmission method, please refers to subsequent embodiment.
Access point processor 101 can be used for carrying out foundation and dismounting of wireless channel management and communication link etc..It can be
General processor, such as central processing unit (central processing unit, CPU), processor 101 may also include hardware
Chip, above-mentioned hardware chip can be the combination of one or more of: specific integrated circuit (application specific
Integrated circuit, ASIC), field programmable gate array (field programmable gate array,
FPGA), Complex Programmable Logic Devices (complex programmable logic device, CPLD).Processor 101 can
The data that processing receiver 109 receives, processor 601, which can also be handled, will be sent to transmitter 107 for use by antenna 113
The data of transmission.
In the embodiment of the present invention, access point processor 101 can be used for reading and executing computer-readable instruction.Specifically,
Access point processor 101 can be used for calling the program being stored in memory 105, such as one or more embodiments of the application
The method for transmitting signals of offer and executes the instruction that the program includes in the realization program of 10 side of access point.
In the specific implementation, access point 10 may be embodied as wireless transceiver, a basic service set (BSS), an extension
Services set (ESS), fat AP, thin AP etc..
It should be noted that access point 10 shown in Fig. 8 is only a kind of implementation of the embodiment of the present invention, practical application
In, access point 10 can also include more or fewer components, here with no restriction.
Show with reference to Fig. 9, Fig. 9 structure for showing the first equipment (IoT equipment) 20 of some embodiments of the present application offer
It is intended to.The IoT equipment in Fig. 1 may be implemented into first equipment 20.As shown in figure 9, the first equipment 20 can include: communication interface
203, one or more processors 201, transmitter 207, receiver 209, coupler 211, antenna 213 and memory 205.These
Component can be connected by bus or other way, and Fig. 9 by bus for being connected.Wherein:
Communication interface 203 can be used for the first equipment 20 and other communication equipments, such as access point, WiFi equipment and net
Network is communicated.In the specific implementation, communication interface 203 can be network communication interface, for example, LTE (4G) communication interface, 5G or
Communication interface, cellular network interface, WLAN interface that person will newly eat dishes without rice or wine in future etc..It is not limited to wireless communication interface, the first equipment 20
Wired communication interface (such as Ethernet interface) be can be configured with to support wire communication.
Antenna 213 can be used for the electromagnetic wave being converted into the electromagnetic energy in transmission line in free space, or will be freely empty
Between in electromagnetic wave be converted into the electromagnetic energy in transmission line.Coupler 211 can be used for messenger being divided into multichannel, distribute to multiple
Receiver 209.
Transmitter 207 can be used for carrying out transmitting processing to the signal that processor 201 exports, for setting to WiFi equipment, IoT
Standby or other access points emit signal.Receiver 209 can be used for carrying out reception processing to 213 received signal of antenna, for connecing
Receive the signal of WiFi equipment, IoT equipment or the transmitting of other access points.In some embodiments of the present application, transmitter 207 and connect
A radio modem can be regarded as by receiving device 209.In the first equipment 20, the quantity of transmitter 207 and receiver 209
To be one or more.
Memory 205 is coupled with processor 201, for storing various software programs and/or multiple groups instruction.Specific implementation
In, memory 205 may include the memory of high random access, and may also comprise nonvolatile memory, such as one or
Multiple disk storage equipments, flash memory device or other non-volatile solid-state memory devices.Memory 205 can store an operating system
(following abbreviation systems), such as the embedded OSs such as uCOS, VxWorks, RTLinux.Memory 205 can also store net
Network signal procedure, the network communication program can be used for one or more optional equipments, one or more terminal devices, one or
Multiple access points are communicated.
In some embodiments of the present application, one or more embodiments that memory 205 can be used for storing the application are mentioned
Realization program of the method for transmitting signals of confession in 20 side of the first equipment.The letter that one or more embodiments about the application provide
The realization of number transmission method, please refers to subsequent embodiment.
Processor 201 can be used for carrying out foundation and dismounting of wireless channel management and communication link etc..It can be general place
Device, such as central processing unit (central processing unit, CPU) are managed, processor 201 may also include hardware chip, on
Stating hardware chip can be the combination of one or more of: specific integrated circuit (application specific
Integrated circuit, ASIC), field programmable gate array (field programmable gate array,
FPGA), Complex Programmable Logic Devices (complex programmable logic device, CPLD).Processor 201 can
The data that processing receiver 209 receives, processor 601, which can also be handled, will be sent to transmitter 207 for use by antenna 213
The data of transmission.
In the embodiment of the present invention, processor 201 can be used for reading and executing computer-readable instruction.Specifically, processor
201 can be used for calling the program that is stored in memory 205, such as the signal that provides of one or more embodiments of the application passes
Transmission method and executes the instruction that the program includes in the realization program of 20 side of the first equipment.
It should be noted that the first equipment 20 shown in Fig. 9 is only a kind of implementation of the embodiment of the present invention, actually answer
In, the first equipment 20 can also include more or fewer components, here with no restriction.
The structure of the second equipment (WiFi equipment) 30 of some embodiments of the present application offer is provided with reference to Figure 10, Figure 10
Schematic diagram.The second equipment in Fig. 1 may be implemented into second equipment 30.As shown in Figure 10, the second equipment 30 can include: communication connects
Mouth 303, one or more processors 301, transmitter 307, receiver 309, coupler 311, antenna 313 and memory 305.This
A little components can be connected by bus or other way, and Figure 10 by bus for being connected.Wherein:
Communication interface 303 can be used for the second equipment 30 and other communication equipments, such as access point, IoT equipment and network
It is communicated.In the specific implementation, communication interface 303 can be network communication interface, for example, LTE (4G) communication interface, 5G or
Communication interface, cellular network interface, the WLAN interface etc. that future newly eats dishes without rice or wine.It is not limited to wireless communication interface, the second equipment 30 is also
Wire communication can be supported configured with wired communication interface (such as Ethernet interface).
Antenna 313 can be used for the electromagnetic wave being converted into the electromagnetic energy in transmission line in free space, or will be freely empty
Between in electromagnetic wave be converted into the electromagnetic energy in transmission line.Coupler 311 can be used for messenger being divided into multichannel, distribute to multiple
Receiver 309.
Transmitter 307 can be used for carrying out transmitting processing to the signal that processor 301 exports, for setting to WiFi equipment, IoT
Standby or other access points emit signal.Receiver 309 can be used for carrying out reception processing to 313 received signal of antenna, for connecing
Receive the signal of WiFi equipment, IoT equipment or the transmitting of other access points.In some embodiments of the present application, transmitter 307 and connect
A radio modem can be regarded as by receiving device 309.In the second equipment 30, the quantity of transmitter 307 and receiver 309
To be one or more.
Memory 305 is coupled with processor 301, for storing various software programs and/or multiple groups instruction.Specific implementation
In, memory 305 may include the memory of high random access, and may also comprise nonvolatile memory, such as one or
Multiple disk storage equipments, flash memory device or other non-volatile solid-state memory devices.Memory 305 can store an operating system
(following abbreviation systems), such as the embedded OSs such as uCOS, VxWorks, RTLinux.Memory 305 can also store net
Network signal procedure, the network communication program can be used for one or more optional equipments, one or more terminal devices, one or
Multiple access points are communicated.
In some embodiments of the present application, one or more embodiments that memory 305 can be used for storing the application are mentioned
Realization program of the method for transmitting signals of confession in 30 side of the second equipment.The letter that one or more embodiments about the application provide
The realization of number transmission method, please refers to subsequent embodiment.
Processor 301 can be used for carrying out foundation and dismounting of wireless channel management and communication link etc..It can be general place
Device, such as central processing unit (central processing unit, CPU) are managed, processor 301 may also include hardware chip, on
Stating hardware chip can be the combination of one or more of: specific integrated circuit (application specific
Integrated circuit, ASIC), field programmable gate array (field programmable gate array,
FPGA), Complex Programmable Logic Devices (complex programmable logic device, CPLD).Processor 301 can
The data that processing receiver 309 receives, processor 601, which can also be handled, will be sent to transmitter 307 for use by antenna 313
The data of transmission.
In the embodiment of the present invention, processor 301 can be used for reading and executing computer-readable instruction.Specifically, processor
301 can be used for calling the program that is stored in memory 305, such as the signal that provides of one or more embodiments of the application passes
Transmission method and executes the instruction that the program includes in the realization program of 30 side of the second equipment.
It should be noted that the second equipment 30 shown in Fig. 10 is only a kind of implementation of the embodiment of the present invention, it is practical
In, the second equipment 30 can also include more or fewer components, here with no restriction.
It is a kind of access point provided by the present application and a kind of structural schematic diagram of first equipment referring to Figure 11, Figure 11.Access
Point 40 can be the described access point in preceding method embodiment 3 or 4, and the first equipment 50 can be preceding method embodiment 3 or 4
In first equipment.
Firstly, as shown in figure 11, access point 40 can include: generation unit 401, transmission unit 402, wherein
Generation unit 401, for generating the first signal and the second signal；Wherein, first signal is used for reserve channel,
Second signal is used to indicate the second equipment and keeps silent；
Transmission unit 402 sends the by the second bandwidth for sending the first signal to the first equipment by the first bandwidth
Binary signal；
Transmission unit 402 is also used to send data to the first equipment by the first bandwidth；
Wherein, the first bandwidth and the second bandwidth difference, and the first bandwidth and the second bandwidth partly or entirely weigh on frequency domain
It is folded.Optionally, the first bandwidth is all covered on frequency domain by the second bandwidth.
In an alternative embodiment, access point 40 further include: receiving unit 403, receiving unit 403 is for receiving the first equipment
Respond the third signal of the first signal transmission.
Secondly, as shown in figure 11, the first equipment 50 can include: receiving unit 501, wherein
Receiving unit 501, for receiving the first signal of access point transmission, the first signal is used for reserve channel；It is also used to
Receive the data that access point is sent；Wherein, the bandwidth of operation of the first equipment is the first bandwidth.
In an alternative embodiment, the first equipment 50 may also include generation unit 502, transmission unit 503, wherein
Generation unit 502, for generating third signal, third signal is for responding the first signal；
Transmission unit 503, for sending third signal to access point.
Here, the first signal, second signal, the specific implementation of third signal and effect can refer to embodiment of the method 3 and 4
Associated description；It should be understood that the specific implementation for each functional unit for including about access point 40, the first equipment 50 include
The specific implementation of each functional unit can refer to preceding method embodiment 3 or 4, and which is not described herein again.
It is a kind of access point provided by the present application and a kind of structural schematic diagram of first equipment referring to Figure 12, Figure 12.Access
Point 60 can be the described access point in preceding method embodiment 1 or 2, and the first equipment 70 can be preceding method embodiment 1 or 2
In first equipment.
Firstly, as shown in figure 12, access point 60 can include: generation unit 601, receiving unit 602, transmission unit 603,
In,
Receiving unit 602, for receiving the fourth signal of the first equipment transmission, fourth signal is used for reserve channel；
Generation unit 601, for generating the first signal and the second signal；Wherein, the first signal be used for reserve channel, second
Signal is used to indicate the second equipment and keeps silent；
Transmission unit 603 sends the first signal to the first equipment by the first bandwidth for responding the fourth signal,
It is also used to send second signal by the second bandwidth；
Wherein, the first bandwidth and the second bandwidth difference, and the first bandwidth and the second bandwidth partly or entirely weigh on frequency domain
It is folded.Optionally, the first bandwidth is all covered on frequency domain by the second bandwidth.
Secondly, as shown in figure 12, the first equipment 70 can include: generation unit 701, transmission unit 702, receiving unit 703,
Wherein,
Generation unit 701, for generating fourth signal, fourth signal is used for reserve channel；
Transmission unit 702, for sending fourth signal to access point；
Receiving unit 703, the first signal sent for receiving access point in response to fourth signal, the first signal is for pre-
About channel；
Transmission unit 702, was also used to by the waiting time, sent data to described access point；
Wherein, the bandwidth of operation of the first equipment is the first bandwidth.
Here, fourth signal, the first signal, the specific implementation of second signal and effect can refer to embodiment of the method 1 and 2
Associated description；It should be understood that the specific implementation for each functional unit for including about access point 60, the first equipment 70 include
The specific implementation of each functional unit can refer to preceding method embodiment 1 or 2, and which is not described herein again.
In addition, the wireless communication system can be shown in FIG. 1 logical present invention also provides a kind of wireless communication system
Letter system, it may include: access point, the first equipment and the second equipment.Wherein, described access point can be Fig. 5, Fig. 6 or Fig. 7 difference
Access point in corresponding embodiment of the method, first equipment can be the corresponding embodiment of the method for Fig. 5, Fig. 6 or Fig. 7
In the first equipment, second equipment can be the second equipment in the corresponding embodiment of the method for Fig. 5, Fig. 6 or Fig. 7.
In the specific implementation, described access point can be access point 10 shown in Fig. 8, first equipment can be Fig. 9 institute
The first equipment 20 shown, second equipment can be the second equipment 30 shown in Fig. 10.Described access point, the first equipment can also
To be access point 40 shown in Figure 11 and the first equipment 50 respectively.Described access point, the first equipment can also be Figure 12 institute respectively
The access point 60 shown and the first equipment 70.
Specific implementation about described access point, the first equipment and the second equipment can refer to embodiment of the method, here no longer
It repeats.
To sum up, implement the application, channel confliction occurs for the equipment that can be avoided work in different bandwidth.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program
Product includes one or more computer instructions.When loading on computers and executing the computer program instructions, all or
It partly generates according to process described herein or function.The computer can be general purpose computer, special purpose computer, meter
Calculation machine network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or
It is transmitted from a computer readable storage medium to another computer readable storage medium, for example, the computer instruction can
To pass through wired (such as coaxial cable, optical fiber, digital subscriber from a web-site, computer, server or data center
Line) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or data center into
Row transmission.The computer readable storage medium can be any usable medium or include one that computer can access
Or the data storage devices such as integrated server, data center of multiple usable mediums.The usable medium can be magnetic medium,
(for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid State
Disk) etc..
Claims (54)
1. a kind of method for transmitting signals characterized by comprising
Access point sends the first signal to the first equipment by the first bandwidth, and first signal is used for reserve channel；
Described access point sends second signal by the second bandwidth, and the second signal is used to indicate the second equipment and keeps silent；
Described access point sends data to first equipment by first bandwidth；
Wherein, first bandwidth and second bandwidth are different, and first bandwidth on frequency domain by second bandwidth
All coverings.
2. the method as described in claim 1, which is characterized in that first signal is transmission claim frame,
Before described access point sends second signal by the second bandwidth, the method also includes:
Described access point receives first equipment and responds the third signal that first signal is sent.
3. the method as described in claim 1, which is characterized in that first signal is Clear to Send frame.
4. a kind of method for transmitting signals characterized by comprising
Access point receives the fourth signal that the first equipment is sent, and the fourth signal is used for reserve channel；
Described access point sends the first signal to first equipment in response to the fourth signal, by the first bandwidth, described
First signal is used for reserve channel；
Described access point sends second signal by the second bandwidth, and the second signal is used to indicate the second equipment and keeps silent；
Wherein, first bandwidth and second bandwidth are different, and first bandwidth on frequency domain by second bandwidth
All coverings.
5. method as claimed in claim 4, which is characterized in that described access point by the second bandwidth send second signal it
Before, the method also includes:
Described access point receives the 5th signal that first equipment is sent, and the 5th signal is used to indicate described access point hair
Send the second signal.
6. method as described in claim 4 or 5, which is characterized in that the fourth signal is transmission claim frame.
7. method as claimed in claim 6, which is characterized in that the fourth signal includes the instruction letter of the 4th duration
Breath, the 4th duration are the time that the fourth signal is used for reserve channel, and the 4th duration is for described
Access point determines the second duration in the first duration and the second signal in first signal；
Wherein, first duration is the time of the first signal reserve channel, and second duration is used for institute
It states the second equipment and determines the duration for keeping silent.
8. such as the described in any item methods of claim 6-7, which is characterized in that include flag bit in the fourth signal, be used for
Indicate that described access point sends the second signal when the flag bit takes the first value.
9. method as described in claim 4 or 5, which is characterized in that the fourth signal is quiet signal, the peace and quiet signal
For any one in sine wave, swept-frequency signal or busy signal.
10. method as claimed in claim 9, which is characterized in that basic service set identification belonging to first equipment by with
At least one of lower instruction: the frequency of the fourth signal, the initial frequency of the fourth signal or cutoff frequency, the 4th letter
Number period or changing rule；
Described access point sends the first signal to the first equipment by the first bandwidth, and described access point sends the by the second bandwidth
Binary signal specifically includes: described access point judge basic service set identification belonging to first equipment whether with the access
The basic service set identification of point is identical；If they are the same, then first letter is sent to first equipment by first bandwidth
Number, the second signal is sent by second bandwidth.
11. the method as described in claim 9 or 10, which is characterized in that
The mark of first equipment or the 4th duration are by least one of following instruction: the frequency of the fourth signal, institute
State the variation rule of the initial frequency of fourth signal or the frequency of cutoff frequency, the period of the fourth signal or the fourth signal
Rule；
Wherein, the mark of first equipment determines the reception address in first signal for described access point；
Wherein, the 4th duration is the time that the fourth signal is used for reserve channel, and the 4th duration is used
The second duration in the first duration and the second signal that described access point determines in first signal, institute
The time that the first duration was the first signal reserve channel is stated, second duration is true for second equipment
It is fixed to be kept for the silent duration.
12. such as the described in any item methods of claim 3-11, which is characterized in that the reception address quilt in first signal
It is set as the address of first equipment, the reception address in the second signal is arranged to the address of described access point.
13. such as the described in any item methods of claim 3-12, which is characterized in that described access point is sending first letter
The second signal is sent at the end of number, alternatively, described access point sends described first at the end of sending the second signal
Signal.
14. such as the described in any item methods of claim 3-12, which is characterized in that first signal include first part and
Second part, the first part are used to indicate first equipment transmission data, and the second part is used to indicate described
The duration of one equipment transmission data；
The first part is transmitted in front of the second signal, the second part be transmitted in the second signal it
Afterwards.
15. the method as described in any one of claim 3-14, which is characterized in that
First signal includes the instruction information of the first duration, and first duration is first signal reservation
The time of channel；
The second signal includes the instruction information of the second duration, and second duration is true for second equipment
It is fixed to be kept for the silent duration.
16. a kind of method for transmitting signals characterized by comprising
First equipment sends fourth signal to access point, and the fourth signal is used for reserve channel；
First equipment receives the first signal that described access point is sent in response to the fourth signal, and first signal is used
In reserve channel；
First equipment passes through the waiting time, sends data to described access point；
Wherein, the bandwidth of operation of first equipment is the first bandwidth.
17. the method described in claim 16, which is characterized in that
The waiting time is the transmission time that two interframe spaces add second signal；Alternatively,
The waiting time is the transmission time that an interframe space adds second signal；Alternatively,
The waiting time is an interframe space；
Wherein, to be described access point be sent to the second equipment by the second bandwidth to the second signal, and the second signal is used
Keep silent in instruction second equipment；First bandwidth is all covered on frequency domain by second bandwidth.
18. such as the described in any item methods of claim 16-17, which is characterized in that first equipment receives described access point
After the first signal sent in response to the fourth signal, further includes:
First equipment sends the 5th signal to described access point, and the 5th signal is used to indicate described access point by the
Two bandwidth send second signal；
Wherein, the second signal is used to indicate the second equipment and keeps silent, and the bandwidth of operation of second equipment is the second band
Width, first bandwidth are all covered on frequency domain by second bandwidth.
19. such as the method for any one of claim 16-18, which is characterized in that the fourth signal is transmission claim frame.
20. method as claimed in claim 19, which is characterized in that the fourth signal includes the instruction letter of the 4th duration
Breath, the 4th duration are the time that the fourth signal is used for reserve channel, and the 4th duration is for described
Access point determines that the first duration in first signal, first duration are the first signal reserve channel
Time.
21. such as the described in any item methods of claim 19-20, which is characterized in that it include flag bit in the fourth signal,
For indicating that described access point sends second signal when the flag bit takes the first value；
Wherein, the second signal is used to indicate the second equipment and keeps silent, and the bandwidth of operation of second equipment is the second band
Width, first bandwidth are all covered on frequency domain by second bandwidth.
22. such as the described in any item methods of claim 16-18, which is characterized in that the fourth signal is quiet signal, institute
Stating quiet signal is any one in sine wave, swept-frequency signal or busy signal.
23. method as claimed in claim 22, which is characterized in that basic service set identification belonging to first equipment by with
At least one of lower instruction: the frequency of the fourth signal, the initial frequency of the fourth signal or cutoff frequency, the 4th letter
Number period or changing rule；
Wherein, basic service set identification described in first equipment is confirmed whether and described access point for described access point
Basic service set identification is identical, and if they are the same, then first equipment receives first signal that described access point is sent.
24. the method as described in claim 22 or 23, which is characterized in that
The mark of first equipment or the 4th duration are by least one of following instruction: the frequency of the fourth signal, institute
State the variation rule of the initial frequency of fourth signal or the frequency of cutoff frequency, the period of the fourth signal or the fourth signal
Rule；
Wherein, the mark of first equipment determines the reception address in first signal for described access point；
Wherein, the 4th duration is the time that the fourth signal is used for reserve channel, and the 4th duration is used
Determine that the first duration in first signal, first duration are that first signal is pre- in described access point
The about time of channel.
25. such as the described in any item methods of claim 16-24, which is characterized in that the reception address quilt in first signal
It is set as the address of first equipment.
26. such as the described in any item methods of claim 16-25, which is characterized in that when first signal includes first lasting
Between instruction information, first duration be the first signal reserve channel time.
27. a kind of access point characterized by comprising generation unit, transmission unit, wherein
The generation unit, for generating the first signal and the second signal；Wherein, first signal is used for reserve channel, institute
It states second signal and is used to indicate the second equipment holding silence；
The transmission unit is sent for sending first signal to the first equipment by the first bandwidth by the second bandwidth
The second signal；
The transmission unit is also used to send data to first equipment by first bandwidth；
Wherein, first bandwidth and second bandwidth are different, and first bandwidth on frequency domain by second bandwidth
All coverings.
28. access point as claimed in claim 27, which is characterized in that first signal is transmission claim frame, the access
Point further include: receiving unit, the receiving unit are used to receive first equipment and respond the third that first signal is sent
Signal.
29. access point as claimed in claim 27, which is characterized in that first signal is Clear to Send frame.
30. a kind of access point characterized by comprising generation unit, receiving unit, transmission unit, wherein
The receiving unit, for receiving the fourth signal of the first equipment transmission, the fourth signal is used for reserve channel；
The generation unit, for generating the first signal and the second signal；Wherein, first signal is used for reserve channel, institute
It states second signal and is used to indicate the second equipment holding silence；
The transmission unit sends described first to first equipment by the first bandwidth for responding the fourth signal
Signal is also used to send the second signal by the second bandwidth,；
Wherein, first bandwidth and second bandwidth are different, and first bandwidth on frequency domain by second bandwidth
All coverings.
31. access point as claimed in claim 30, which is characterized in that the receiving unit is also used to receive first equipment
The 5th signal sent, the 5th signal are used to indicate described access point and send the second signal.
32. the access point as described in claim 30 or 31, which is characterized in that the fourth signal is transmission claim frame.
33. access point as claimed in claim 32, which is characterized in that the fourth signal includes the instruction of the 4th duration
Information, the 4th duration are the time that the fourth signal is used for reserve channel, and the 4th duration is used for institute
It states generation unit and determines the second duration in the first duration and the second signal in first signal；
Wherein, first duration is the time of the first signal reserve channel, and second duration is used for institute
It states the second equipment and determines the duration for keeping silent.
34. such as the described in any item access points of claim 32-33, which is characterized in that include mark in the fourth signal
Position, for indicating that the transmission unit sends the second signal when the flag bit takes the first value.
35. the access point as described in claim 30 or 31, which is characterized in that the fourth signal is quiet signal, the peace
Quiet signal is any one in sine wave, swept-frequency signal or busy signal.
36. access point as claimed in claim 35, which is characterized in that basic service set identification belonging to first equipment by
At least one instruction below: the frequency of the fourth signal, the initial frequency of the fourth signal or cutoff frequency, the described 4th
The period of signal or changing rule；
Described access point further include: judging unit, the judging unit is for judging basic service belonging to first equipment
Whether set identifier is identical with the basic service set identification of described access point；If they are the same, then the transmission unit passes through described first
Bandwidth sends first signal to first equipment, sends the second signal by second bandwidth.
37. the access point as described in claim 35 or 36, which is characterized in that
The mark of first equipment or the 4th duration are by least one of following instruction: the frequency of the fourth signal, institute
State the variation rule of the initial frequency of fourth signal or the frequency of cutoff frequency, the period of the fourth signal or the fourth signal
Rule；
Wherein, the mark of first equipment determines the reception address in first signal for the generation unit；
Wherein, the 4th duration is the time that the fourth signal is used for reserve channel, and the 4th duration is used
The second duration in the first duration and the second signal that the generation unit determines in first signal,
First duration is the time of the first signal reserve channel, and second duration is used for second equipment
Determine the duration for keeping silent.
38. such as the described in any item access points of claim 29-37, which is characterized in that the reception address in first signal
It is arranged to the address of first equipment, the reception address in the second signal is arranged to the address of described access point.
39. such as the described in any item access points of claim 29-38, which is characterized in that the transmission unit is sending described the
The second signal is sent at the end of one signal, alternatively, the transmission unit sends institute at the end of sending the second signal
State the first signal.
40. such as the described in any item access points of claim 29-38, which is characterized in that first signal includes first part
And second part, the first part are used to indicate first equipment transmission data, the second part is used to indicate described
The duration of first equipment transmission data；
The first part is transmitted in front of the second signal, the second part be transmitted in the second signal it
Afterwards.
41. such as the described in any item access points of claim 29-40, which is characterized in that
First signal includes the instruction information of the first duration, and first duration is first signal reservation
The time of channel；
The second signal includes the instruction information of the second duration, and second duration is true for second equipment
It is fixed to be kept for the silent duration.
42. a kind of first equipment characterized by comprising generation unit, receiving unit, transmission unit, wherein
The generation unit, for generating fourth signal, the fourth signal is used for reserve channel；
The transmission unit, for sending the fourth signal to access point；
The receiving unit, the first signal sent for receiving described access point in response to the fourth signal, described first
Signal is used for reserve channel；
The transmission unit, was also used to by the waiting time, sent data to described access point；
Wherein, the bandwidth of operation of first equipment is the first bandwidth.
43. the first equipment as described in claim 1, which is characterized in that
The waiting time is the transmission time that two interframe spaces add second signal；Alternatively,
The waiting time is the transmission time that an interframe space adds second signal；Alternatively,
The waiting time is an interframe space；
Wherein, to be described access point be sent to the second equipment by the second bandwidth to the second signal, and the second signal is used
Keep silent in instruction second equipment；First bandwidth is all covered on frequency domain by second bandwidth.
44. such as described in any item first equipment of claim 42-43, which is characterized in that
The generation unit, is also used to generate the 5th signal, and the 5th signal is used to indicate described access point and passes through the second band
Width sends second signal；
The transmission unit is also used to send the 5th signal to described access point；
Wherein, the second signal is used to indicate the second equipment and keeps silent, and the bandwidth of operation of second equipment is the second band
Width, first bandwidth are all covered on frequency domain by second bandwidth.
45. such as described in any item first equipment of claim 42-44, which is characterized in that the fourth signal is transmission request
Frame.
46. the first equipment as claimed in claim 45, which is characterized in that the fourth signal includes the finger of the 4th duration
Show information, the 4th duration is the time that the fourth signal is used for reserve channel, and the 4th duration is used for
Described access point determines that the first duration in first signal, first duration are first signal reservation
The time of channel.
47. such as described in any item first equipment of claim 45-46, which is characterized in that include mark in the fourth signal
Position, for indicating that described access point sends second signal when the flag bit takes the first value；
Wherein, the second signal is used to indicate the second equipment and keeps silent, and the bandwidth of operation of second equipment is the second band
Width, first bandwidth are all covered on frequency domain by second bandwidth.
48. such as described in any item first equipment of claim 42-44, which is characterized in that the fourth signal is quiet letter
Number, the peace and quiet signal is any one in sine wave, swept-frequency signal or busy signal.
49. the first equipment as claimed in claim 48, which is characterized in that basic service set identification belonging to first equipment
By at least one of following instruction: the frequency of the fourth signal, the initial frequency of the fourth signal or cutoff frequency, described the
The period of four signals or changing rule；
Wherein, basic service set identification described in first equipment is confirmed whether and described access point for described access point
Basic service set identification is identical, and if they are the same, then first equipment receives first signal that described access point is sent.
50. the first equipment as described in claim 48 or 49, which is characterized in that
The mark of first equipment or the 4th duration are by least one of following instruction: the frequency of the fourth signal, institute
State the variation rule of the initial frequency of fourth signal or the frequency of cutoff frequency, the period of the fourth signal or the fourth signal
Rule；
Wherein, the mark of first equipment determines the reception address in first signal for described access point；
Wherein, the 4th duration is the time that the fourth signal is used for reserve channel, and the 4th duration is used
Determine that the first duration in first signal, first duration are that first signal is pre- in described access point
The about time of channel.
51. such as described in any item first equipment of claim 42-50, which is characterized in that reception in first signal
Location is arranged to the address of first equipment.
52. such as described in any item first equipment of claim 42-51, which is characterized in that first signal is held including first
The instruction information of continuous time, first duration are the time of the first signal reserve channel.
53. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes such as
The described in any item methods of claim 1-15.
54. a kind of computer readable storage medium, including instruction, when run on a computer, so that computer executes such as
The described in any item methods of claim 16-26.
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