CN105101347A - Communication method and device of wireless local network - Google Patents
Communication method and device of wireless local network Download PDFInfo
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Abstract
The embodiment of the invention discloses a communication method of a wireless local network. The method includes: receiving signals sent by a first type of device and obtaining a received signal strength indicated value of the first type of device; receiving signals communicated between at least two second type of devices and obtaining the received signal strength indicated value of each of the second type of devices; obtaining the maximum value in the received signal strength indicated value of each of the second type of devices; and delaying the response to the first type of device if the received signal strength indicated value of the first type of device is less than or equal to the maximum value. Accordingly the embodiment of the invention also discloses a communication device of the wireless local network. Through the embodiment of the invention, when a terminal is in response to the communication of an initiator, the devices in communication are not interfered; the frequency spectrum utilization rate is improved; and thus the area throughput is improved.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a communication method and device for a wireless local area network.
Background
With the advancement of information communication technologies, various wireless communication technologies have been recently developed. Among these wireless communication technologies, a Wireless Local Area Network (WLAN) is a technology that can wirelessly access the internet in a home or business or in an area providing a specific service by using a portable terminal such as a smart mobile terminal, a tablet computer, a portable multimedia player, etc. In the existing Wi-Fi technology, due to co-channel interference, when a certain station STA communicates with an access point AP in an OBSS (overlapping basic service set), other devices cannot communicate, which results in a low spectrum utilization rate.
Currently, the 802.11 protocol group forms a research group of the next generation Wi-Fi technology, high efficiency wireless local area network (HEW), and improves the utilization rate of a spectrum by TPC (transmit power control) and DSC (receiver sensitivity control). However, in the communication system where the new and old devices coexist, if a responder of the new device interferes with the communication of the old device when responding to the communication of the initiator, the responder does not respond to the communication of the initiator, which reduces the spectrum utilization rate.
Disclosure of Invention
The embodiment of the invention provides a communication method of a wireless local area network, which can improve the utilization rate of a frequency spectrum, thereby improving the throughput of a region.
A first aspect of an embodiment of the present invention provides a communication method for a wireless local area network, including:
receiving a signal sent by a first type device and acquiring a received signal strength indicating value of the first type device, wherein the first type device supports a transmission power control mechanism and a receiver sensitivity control mechanism;
receiving signals communicated between at least two second-type devices and obtaining a received signal strength indicating value of each second-type device, wherein the second-type devices support or do not support the transmission power control mechanism and the receiver sensitivity control mechanism;
obtaining a maximum value of the received signal strength indication values of the second type devices;
and if the received signal strength indicating value of the first type equipment is smaller than or equal to the maximum value, delaying to respond to the first type equipment.
In a first possible implementation manner of the first aspect, before the delaying responding to the first type device, the method further includes:
and detecting a frame header of the signal sent by the first type equipment, and confirming that a delay response identifier exists in the frame header.
In a second possible implementation manner of the first aspect, the delaying responding to the first type device includes:
acquiring communication time length between the at least two second-type devices according to the signals of the communication between the at least two second-type devices;
the communication duration is taken as a latency time for responding to the first type device.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the obtaining, according to the signal for communication between the at least two second-type devices, a communication duration between the at least two second-type devices includes:
acquiring the communication time length through a time length sub-field of an MAC header part of a communication frame sent by the communication between the at least two second-type devices; or,
and acquiring the communication time length through a physical header of a communication frame sent by the communication between the at least two second-type devices.
With reference to the first aspect or any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner, after the delay waiting, at least one time slot is waited for to respond to the first type device.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the time slot includes sifs (shortinterframe space) or difs (distributedlnterframe space).
In a sixth possible implementation manner of the first aspect, the method further includes:
and acquiring a difference value between the preset signal emission intensity and the maximum value, and responding to the first type equipment by taking the difference value as the adjusted emission power.
Correspondingly, a second aspect of the embodiments of the present invention further provides a communication device for a wireless local area network, including:
a first signal strength indicated value receiving module, configured to receive a signal sent by a first type device and obtain a received signal strength indicated value of the first type device, where the first type device supports a transmission power control mechanism and a receiver sensitivity control mechanism;
a second signal strength indicating value receiving module, configured to receive a signal communicated between at least two second-type devices and obtain a received signal strength indicating value of each second-type device, where the second-type device supports or does not support the transmission power control mechanism and the receiver sensitivity control mechanism;
an obtaining module, configured to obtain a maximum value of received signal strength indication values of the second type devices received by the second signal strength indication value receiving module;
and the response module is used for delaying the response of the first type equipment if the received signal strength indicating value of the first type equipment is less than or equal to the maximum value.
In a first possible implementation manner of the second aspect, the method further includes:
and the detection module is used for detecting whether a delay response identifier exists in a frame header of a signal sent by the first type equipment, and if so, triggering the response module to delay and respond to the first type equipment when a received signal strength indicating value of the first type equipment is smaller than or equal to the maximum value.
In a second possible implementation manner of the second aspect, the response module includes:
a communication duration obtaining unit, configured to obtain a communication duration between the at least two second-type devices according to a signal of communication between the at least two second-type devices;
a response unit, configured to use the communication duration as a waiting time for responding to the first type device.
With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner, the communication duration obtaining unit includes:
a first communication duration obtaining subunit, configured to obtain the communication duration through a duration sub-field of an MAC header portion of a communication frame sent by the at least two second-type devices; or,
and the second communication duration acquisition subunit acquires the communication duration through a physical header of a communication frame sent by the communication between the at least two second-type devices.
With reference to the second aspect or any one of the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner, the response module is further configured to, after the delay waiting, further:
and waiting for at least one time slot to respond to the first type device.
With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the time slot includes SIFS or DIFS.
In a fifth possible implementation manner of the second aspect, the method further includes:
and the power control module is used for acquiring a difference value between the preset signal emission intensity and the maximum value, and taking the difference value as the adjusted emission power to respond to the first type equipment.
The embodiment of the invention has the following beneficial effects: the terminal can compare the received signal strength indicated value of the first type device with the maximum value in the received signal strength indicated values of the second type devices, and if the received signal strength indicated value of the first type device is smaller than or equal to the maximum value, the terminal responds to the first type device in a delayed manner, so that the terminal does not cause interference to the device which is communicating when responding to the communication of the initiator, the frequency spectrum utilization rate is improved, and the area throughput is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a communication method of a wireless local area network according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating another communication method of a wireless local area network according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication device of a wireless local area network according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a response module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a communication duration obtaining unit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a communication method of a wireless local area network according to an embodiment of the present invention. The communication method of the wireless local area network provided by the embodiment of the invention can be realized on terminals such as an intelligent mobile terminal, a tablet computer, a portable multimedia player and the like which support a transmission power control mechanism and a receiver sensitivity control mechanism. The communication flow of the wireless local area network in the embodiment shown in fig. 1 may include:
s110, receiving a signal sent by a first type device and obtaining a received signal strength indication value of the first type device, where the first type device supports a transmission power control mechanism and a receiver sensitivity control mechanism.
Specifically, the terminal may monitor a channel, so as to receive a signal sent by the first type device, and obtain a received signal strength indicator of the first type device according to the signal.
S120, receiving a signal communicated between at least two second-type devices and obtaining a received signal strength indicator of each second-type device, where the second-type devices may or may not support the transmission power control mechanism and the receiver sensitivity control mechanism.
Specifically, the terminal may monitor the channel, so as to receive signals of at least two second-type devices, and obtain the received signal strength indication value of each second-type device according to the received signals of the second-type devices, where the device supporting the transmission power control mechanism and the receiver sensitivity control mechanism is a new device, and the device not supporting the transmission power control mechanism or the receiver sensitivity control mechanism is an old device.
It should be noted that, in the embodiment of the present invention, the terminal acquires the signal of the first type device first and then acquires the signals of the at least two second type devices, and in other optional embodiments, the terminal may also acquire the signals of the at least two second type devices first and then acquire the signal of the first type device, or the terminal receives the signals in sequence according to the sequence of the detected signals, for example, the terminal detects the signal of the first type device first and then detects the signal of the second type device, and then the terminal receives the signal of the first type device first and then receives the signal of the second type device.
S130, obtaining a maximum value of the received signal strength indication values of the second type devices.
Specifically, when the terminal acquires the signal strength indicating values of at least two second-type devices, the terminal may compare the received signal strength indicating values, so as to acquire a maximum value among the received signal strength indicating values of the second-type devices.
S140, if the received signal strength indicator of the first type device is less than or equal to the maximum value, delaying to respond to the first type device.
Specifically, when the terminal obtains a maximum value among the received signal strength indicating values of the second type devices, the terminal may compare the received signal strength indicating value of the first type device with the maximum value;
if the indication of the received signal strength of the first type device is less than or equal to the maximum value, it can be said that the distance between the terminal and the first type device is greater than or equal to the distance between the terminal and at least one second type device, and at this time, if the terminal directly responds to the communication of the first type device, the signal sent by the terminal to the first type device may cause interference to the communication of the second type device, and the terminal delays to respond to the first type device;
optionally, the terminal may obtain the communication duration between the at least two second-type devices according to the signal of the communication between the at least two second-type devices, and use the communication duration as the waiting time for responding to the first-type device, that is, the terminal may respond to the first-type device after the communication of each second-type device is ended, so as to avoid interference to the communication of the second-type devices.
Further, the terminal may wait for at least one time slot after the communication of the second type device is ended to respond to the communication of the first type device.
If the indication of the received signal strength of the first type device is greater than the maximum value, it may be indicated that the distance between the terminal and the first type device is less than the distance between the terminal and each of the second type devices, that is, the signal sent by the terminal to the first type device does not interfere with the communication of the second type device, and then the terminal directly responds or waits for at least one time slot to respond to the first type device.
The time slot may include SIFS or DIFS, SIFS and DIFS may provide access control of different priorities, and DIFS is a distributed inter-frame slot with the lowest priority for latency of asynchronous frame contention access; the SIFS has the highest priority for operations that require immediate response.
In the embodiment of the invention, the terminal can compare the received signal strength indicated value of the first type device with the maximum value in the received signal strength indicated values of the second type devices, and if the received signal strength indicated value of the first type device is smaller than or equal to the maximum value, the first type device is delayed to respond, so that the terminal does not cause interference to the device which is communicating when responding to the communication of the initiator, the frequency spectrum utilization rate is improved, and the regional throughput is improved.
Referring to fig. 2, fig. 2 is a flowchart illustrating another communication method of a wireless local area network according to an embodiment of the present invention. The communication method of the wireless local area network provided by the embodiment of the invention can be realized on terminals such as an intelligent mobile terminal, a tablet computer, a portable multimedia player and the like which support a transmission power control mechanism and a receiver sensitivity control mechanism. The communication flow of the wireless local area network in the embodiment shown in fig. 2 may include:
s201, receiving a signal sent by a first type device and obtaining a received signal strength indication value of the first type device, where the first type device supports a transmission power control mechanism and a receiver sensitivity control mechanism.
Specifically, the terminal may monitor a channel, so as to receive a signal sent by the first type device, and obtain a received signal strength indicator of the first type device according to the signal.
S202, receiving a signal communicated between at least two second-type devices and obtaining a received signal strength indication value of each second-type device, where the second-type devices may or may not support the transmission power control mechanism and the receiver sensitivity control mechanism.
Specifically, the terminal may monitor the channel, so as to receive signals of at least two second-type devices, and obtain the received signal strength indication value of each second-type device according to the received signals of the second-type devices, respectively.
S203, obtaining a maximum value of the received signal strength indication values of the second type devices.
Specifically, when the terminal acquires the signal strength indicating values of at least two second-type devices, the terminal may compare the received signal strength indicating values, so as to acquire a maximum value among the received signal strength indicating values of the second-type devices.
S204, judging whether the received signal strength indicating value of the first type equipment is larger than the maximum value.
Specifically, when the terminal obtains a maximum value from the received signal strength indicating values of the second type devices, the terminal may compare the received signal strength indicating value of the first type device with the maximum value, so as to determine whether the received signal strength indicating value of the first type device is greater than the maximum value, and if the received signal strength indicating value of the first type device is greater than the maximum value, it may be said that the distance between the terminal and the first type device is smaller than the distance between the terminal and each of the second type devices, that is, the signal sent by the terminal to the first type device does not interfere with the communication of the second type device, then step S209 is executed; if the received signal strength indicator value of the first type device is not greater than the maximum value, i.e. the received signal strength indicator value of the first type device is less than or equal to the maximum value, step S205 is performed.
And S205, if not, detecting whether a delay response identifier exists in a frame header of the signal sent by the first type device.
The delay response flag indicates that the first type device allows delay response, if the received signal strength indicated value of the first type device is not greater than the maximum value, that is, the received signal strength indicated value of the first type device is less than or equal to the maximum value, the terminal may detect whether the delay response flag exists in a frame header of a signal sent by the first type device, and if the delay response flag exists, it indicates that the first type device allows delay response communication, then step S207 is executed; if not, indicating that the first type device does not allow the delayed response communication, step S206 is performed.
It should be noted that, in the embodiment of the present invention, when determining that the received signal strength indication value of the first type device is not greater than the maximum value, the terminal detects whether a delay response identifier exists in a frame header of a signal sent by the first type device, and in other optional embodiments, when receiving the signal sent by the first type device, the terminal may detect whether a delay response identifier exists in a frame header of the signal sent by the first type device.
S206, if not, the first type equipment is not responded.
And if the terminal detects that the delay response identification does not exist in the frame header of the signal sent by the first type equipment, the terminal does not respond to the communication of the first type equipment.
And S207, if so, acquiring the communication time length between the at least two second-type devices according to the communication signal between the at least two second-type devices.
Optionally, a duration sub-field of a MAC (media access control) header portion of a communication frame sent by the inter-device communication of the second type may carry a duration required by the device of the second type for the current communication, and therefore, the terminal may obtain the communication duration from the duration sub-field of the MAC header portion of the communication frame.
In another optional implementation manner, the physical header of the communication frame sent between communications of the second type device may carry the time length required by the second type device for the current communication, and therefore, the terminal may obtain the communication time length from the physical header of the communication frame.
It should be noted that, in this embodiment of the present invention, the terminal acquires the communication duration of the second type device after detecting that the delay response identifier exists in the frame header of the signal sent by the first type device, and in other optional embodiments, the terminal may acquire the communication duration of the second type device when receiving at least two signals of the second type device, or acquire the communication duration of the second type device at any time before executing step S209.
S208, the communication duration is taken as the waiting duration of the first type equipment.
The terminal may use the obtained communication duration as a waiting duration for responding to the first type device, that is, in order not to interfere with the communication of the second type device, the terminal does not respond to the first type device within the duration, the terminal only responds to the first type device when the waiting duration reaches the communication duration, that is, the communication of the second type device is ended, the terminal further determines whether the first type device allows a delay response or not on the basis of determining that the received signal strength indicating value of the first type device is less than or equal to the maximum value, and after determining that the first type device allows the delay response, the terminal responds to the first type device after the communication of the second type device is ended according to the communication duration of the second type device, if the first type device does not allow the delay response, the terminal does not respond to the first type device, and the terminal does not transmit a useless signal by using the spectrum resource, further, the resource utilization rate is improved.
The time slot may include SIFS or DIFS, SIFS and DIFS may provide access control of different priorities, and DIFS is a distributed inter-frame slot with the lowest priority for latency of asynchronous frame contention access; the SIFS has the highest priority for operations that require immediate response.
Optionally, when the waiting duration reaches the communication duration, the terminal may wait for at least one time slot to respond to the first type device.
S209, obtaining a difference value between the preset signal emission intensity and the maximum value, and taking the difference value as the adjusted emission power to respond to the first type equipment.
Specifically, the terminal may obtain a difference between the preset signal emission intensity and the maximum value, and respond to the first type device with the difference as the adjusted emission power, so that the adjusted emission power responds to the first type device without causing interference to communication of the second type device, thereby improving the spectrum utilization rate.
It should be noted that, in other alternative embodiments, when the waiting time of the terminal reaches the communication time, the terminal may also directly respond to the first type device with the preset signal transmission strength.
In the embodiment of the invention, the terminal can further judge whether the first type device allows the delayed response or not on the basis of determining that the received signal strength indicating value of the first type device is smaller than or equal to the maximum value, and after determining that the first type device allows the delayed response, the terminal responds to the first type device after the communication of the second type device is finished according to the communication time length of the second type device, so that the resource utilization rate is improved.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a communication device of a wireless local area network according to an embodiment of the present invention. The communication device of the wireless local area network provided by the embodiment of the invention can comprise terminals such as an intelligent mobile terminal, a tablet computer, a portable multimedia player and the like which support a transmission power control mechanism and a receiver sensitivity control mechanism. The communication device 30 of the wireless local area network in the embodiment of the present invention shown in fig. 3 may at least include a first signal strength indicator value receiving module 31, a second signal strength indicator value receiving module 32, an obtaining module 33, and a response module 34, where:
a first signal strength indication value receiving module 31, configured to receive a signal sent by a first type device and obtain a received signal strength indication value of the first type device, where the first type device supports a transmission power control mechanism and a receiver sensitivity control mechanism.
A second signal strength indication value receiving module 32, configured to receive signals communicated between at least two second-type devices and obtain received signal strength indication values of the second-type devices, where the second-type devices may or may not support the transmission power control mechanism and the receiver sensitivity control mechanism.
An obtaining module 33, configured to obtain a maximum value of the received signal strength indicator values of the respective second type devices received by the second signal strength indicator value receiving module 32.
In a specific implementation, when the second signal strength indication value receiving module 32 obtains received signal strength indication values of at least two second-type devices, the obtaining module 33 may compare the received signal strength indication values, so as to obtain a maximum value in the received signal strength indication values of the second-type devices.
A response module 34, configured to delay responding to the first type device if the rssi value of the first type device is less than or equal to the maximum value.
In a specific implementation, the response module 34 may compare the rssi value of the first type device with a maximum value, and if the rssi value of the first type device is smaller than or equal to the maximum value, the response module 34 delays to respond to the first type device.
As shown in fig. 4, the response module 34 may further include a communication duration obtaining unit 341 and a response unit 342, where:
a communication duration obtaining unit 341, configured to obtain a communication duration between the at least two second type devices according to a signal of communication between the at least two second type devices; a responding unit 342, configured to take the communication duration as a waiting time for responding to the first type device.
Further, the communication duration obtaining unit 341 may further include, as shown in fig. 5, a first communication duration obtaining subunit 3411, a second communication duration obtaining subunit 3412, and a connecting unit 3413, where:
the first communication duration obtaining subunit 3411 obtains the communication duration through a duration sub-field of the MAC header portion of the communication frame sent by the at least two second-type inter-device communications.
The second communication duration obtaining subunit 3412 obtains the communication duration through a physical header of a communication frame sent by the at least two pieces of inter-device communication of the second type.
In a specific implementation, if the received signal strength indication value of the first type device is less than or equal to the maximum value, the communication duration obtaining unit 341 may obtain a communication duration of communication between the second type devices according to a signal of the second type device, and the response unit 342 responds to the first type device when the waiting time is equal to the communication duration, that is, after the communication between the second type devices is ended, the response unit 342 responds to the first type device.
The connection unit 3413 is configured to connect the first communication duration obtaining subunit 3411 with the second communication duration obtaining subunit 3412, and the connection unit 3413 may be a normal connection unit.
Optionally, the response module 34 may further wait at least one time slot to respond to the first type device when the waiting time reaches the communication duration, where the time slot may include SIFS or DIFS. SIFS and DIFS can provide access control with different priorities, wherein the DIFS is a distributed interframe space, the priority is the lowest, and the DIFS is used for time delay of asynchronous frame competition access; the SIFS has the highest priority for operations that require immediate response.
Further, the communication device 30 of the wireless local area network may further include a detecting module 35, configured to detect whether a delay response identifier exists in a frame header of a signal sent by the first type device, and if so, when a received signal strength indicating value of the first type device is smaller than or equal to the maximum value, trigger the responding module 34 to delay respond to the first type device.
In a specific implementation, when the first signal strength indicating value receiving module 31 receives a signal sent by the first type device, or the comparison result of the obtaining module 33 is that the received signal strength indicating value of the first type device is smaller than or equal to the maximum value, the detecting module 35 may detect whether a delay response identifier exists in a frame header of the signal of the first type device, and if the detecting module 35 detects that the delay response identifier exists in the frame header of the signal sent by the first type device, the triggering module 34 delays to respond to the first type device.
Further optionally, the communication device 30 of the wireless local area network may further include a power control module 36, configured to obtain a difference between a preset signal transmission strength and the maximum value, and use the difference as the adjusted transmission power to respond to the first type device.
In the embodiment of the present invention, the response module may compare the received signal strength indicated value of the first type device with a maximum value in the received signal strength indicated values of the second type devices, and if the received signal strength indicated value of the first type device is smaller than or equal to the maximum value, the response module delays the first type device, so that when the terminal responds to the communication of the initiator, the terminal does not cause interference to the device in communication, and the spectrum utilization rate is improved, thereby improving the area throughput.
The signal strength indicated value acquisition module can receive signals communicated between at least two second-type devices and acquire the received signal strength indicated values of the signals, and the first power adjustment module can adjust the signal transmitting power required by communication with the target device according to the received signal strength indicated values, so that the at least two second-type devices cannot sense that a channel is busy, the access delay of old devices is avoided, and the experience of old device users is enhanced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as a program listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (14)
1. A communication method of a wireless local area network, comprising:
receiving a signal sent by a first type device and acquiring a received signal strength indicating value of the first type device, wherein the first type device supports a transmission power control mechanism and a receiver sensitivity control mechanism;
receiving signals communicated between at least two second-type devices and obtaining a received signal strength indicating value of each second-type device, wherein the second-type devices support or do not support the transmission power control mechanism and the receiver sensitivity control mechanism;
obtaining a maximum value of the received signal strength indication values of the second type devices;
and if the received signal strength indicating value of the first type equipment is smaller than or equal to the maximum value, delaying to respond to the first type equipment.
2. The method of claim 1, wherein the delaying responds to the first type of device before, further comprising:
and detecting a frame header of the signal sent by the first type equipment, and confirming that a delay response identifier exists in the frame header.
3. The method of claim 1, wherein the delaying the response of the first type device comprises:
acquiring communication time length between the at least two second-type devices according to the signals of the communication between the at least two second-type devices;
the communication duration is taken as a latency time for responding to the first type device.
4. The method as claimed in claim 3, wherein said obtaining the duration of communication between said at least two second-type devices according to the signal of communication between said at least two second-type devices comprises:
acquiring the communication time length through a time length sub-field of an MAC header part of a communication frame sent by the communication between the at least two second-type devices; or,
and acquiring the communication time length through a physical header of a communication frame sent by the communication between the at least two second-type devices.
5. The method of any of claims 1 to 4, wherein after the latency wait, at least one time slot is waited for to respond to the first type device.
6. The method of claim 5, wherein the time slot comprises a SIFS or a DIFS.
7. The method of claim 1, further comprising:
and acquiring a difference value between the preset signal emission intensity and the maximum value, and responding to the first type equipment by taking the difference value as the adjusted emission power.
8. A communication device of a wireless local area network, comprising:
a first signal strength indicated value receiving module, configured to receive a signal sent by a first type device and obtain a received signal strength indicated value of the first type device, where the first type device supports a transmission power control mechanism and a receiver sensitivity control mechanism;
a second signal strength indicating value receiving module, configured to receive a signal communicated between at least two second-type devices and obtain a received signal strength indicating value of each second-type device, where the second-type device supports or does not support the transmission power control mechanism and the receiver sensitivity control mechanism;
an obtaining module, configured to obtain a maximum value of received signal strength indication values of the second type devices received by the second signal strength indication value receiving module;
and the response module is used for delaying the response of the first type equipment if the received signal strength indicating value of the first type equipment is less than or equal to the maximum value.
9. The apparatus of claim 8, further comprising:
and the detection module is used for detecting whether a delay response identifier exists in a frame header of a signal sent by the first type equipment, and if so, triggering the response module to delay and respond to the first type equipment when a received signal strength indicating value of the first type equipment is smaller than or equal to the maximum value.
10. The device of claim 8, wherein the response module comprises:
a communication duration obtaining unit, configured to obtain a communication duration between the at least two second-type devices according to a signal of communication between the at least two second-type devices;
a response unit, configured to use the communication duration as a waiting time for responding to the first type device.
11. The apparatus according to claim 10, wherein the communication duration acquisition unit includes:
a first communication duration obtaining subunit, configured to obtain the communication duration through a duration sub-field of an MAC header portion of a communication frame sent by the at least two second-type devices; or,
and the second communication duration acquisition subunit acquires the communication duration through a physical header of a communication frame sent by the communication between the at least two second-type devices.
12. The device of any of claims 8 to 11, wherein the response module, after the delayed wait, is further to:
and waiting for at least one time slot to respond to the first type device.
13. The apparatus of claim 12, wherein the time slot comprises a SIFS or a DIFS.
14. The apparatus of claim 8, further comprising:
and the power control module is used for acquiring a difference value between the preset signal emission intensity and the maximum value, and taking the difference value as the adjusted emission power to respond to the first type equipment.
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