CN114698075A - Information sending method and device between WLAN (Wireless local area network) devices - Google Patents
Information sending method and device between WLAN (Wireless local area network) devices Download PDFInfo
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Abstract
The invention discloses an information sending method and device. The method comprises the following steps: the first device determines a first transmission power used for transmitting first data information to the second device, determines a second transmission power according to the first transmission power, wherein the second transmission power is smaller than or equal to the first transmission power, and then transmits first information to the second device by using the second transmission power, wherein the first information comprises at least one of control information and management information. The first equipment determines the transmission power of the control information or the management information according to the transmission power of the data information, so that the transmission power of the data information is the upper limit of the transmission power of the control information or the management information, the transmission power of the control information or the management information sent by the first equipment is effectively reduced, and the mutual interference generated when wireless signals are sent among the equipment is further reduced.
Description
Technical Field
The present invention relates to the field of wireless communication, and more particularly, to an information sending method and apparatus between WLAN devices.
Background
A Wireless Local Area Network (WLAN) is a Network formed by replacing part or all of transmission media in a wired Local Area Network with Wireless channels of various radio waves (such as laser, infrared, radio frequency, and the like). The most common WLAN technology is Wi-Fi, which is a wireless local area network based on IEEE 802.11 series standards and using high-frequency radio frequency (e.g. radio wave in 2.4GHz, 5GHz, 60GHz, etc.) as a transmission medium. In addition to Wi-Fi, WLAN includes Bluetooth (Bluetooth), Zigbee, Licensed-Assisted Access (LAA), and other wireless transmission technologies.
A typical WLAN system includes a Station (STA) and an Access Point (AP), where the STA accesses the network through the AP. The STA is a device for implementing a wireless access function, and for example, a mobile phone, a computer, an intelligent television, a PAD, a video box, and the like all integrate the STA function at present. The AP is a Device for accessing the STA to the Network, and for example, a wireless router, a Subscriber Premise equipment (CPE) for a partial Digital Subscriber Line (DSL), a Cable Modem (CM), an Optical Network Unit (ONU), and the like all integrate functions of the AP.
In the same WLAN system, a plurality of STAs generally access the network through the AP, and the STAs and the AP, or the STAs or the APs interfere with each other when transmitting wireless signals.
Disclosure of Invention
In view of this, the present application provides an information sending method and apparatus between WLAN devices, which aim to reduce mutual interference when different devices in a WLAN system send wireless signals.
In a first aspect, an information sending method is provided, where the method includes: the first device determines a second transmission power according to the first transmission power, wherein the first transmission power is used for the first device to send first data information to the second device, the second transmission power is smaller than or equal to the first transmission power, and then the first device sends first information to the second device by using the second transmission power, and the first information comprises at least one of control information and management information. The first equipment determines the transmission power of the control information or the management information according to the transmission power of the data information, so that the transmission power of the data information is the upper limit of the transmission power of the control information or the management information, the transmission power of the control information or the management information sent by the first equipment is effectively reduced, and the mutual interference generated when wireless signals are sent among the equipment is further reduced. It is to be understood that the first device may only make the transmission power of the control information less than or equal to the transmission power of the data information, or may only make the transmission power of the management information less than or equal to the transmission power of the data information, or may make the transmission power of both the control information and the management information less than or equal to the transmission power of the data information, which may be specifically selected according to the corresponding requirements. Of course, the transmission power of the control information and the management information is smaller than or equal to the transmission power of the data information, so that the interference can be better reduced.
In a possible implementation manner, the bandwidth occupied by the first information is less than or equal to the bandwidth occupied by the first data information, and the second transmission power is less than or equal to the first transmission power. Therefore, on the premise of avoiding the power of the first information unit bandwidth from being too large, that is, on the premise of avoiding the power spectral density of the control information and the management information from being too large, the transmission power of the control information and the management information is simultaneously reduced, and the purpose of suppressing the interference between different WIFI devices is further achieved simultaneously. In one approach, P2 ═ P1 × BW2/BW1, where P2 represents the second transmit power, P1 represents the first transmit power, BW2 represents the bandwidth of the first information, and BW1 represents the bandwidth of the first data information. By making the power spectral density of the first information (i.e. the control information or the management information) equal to the power spectral density of the first data information, interference equality over a certain bandwidth range, or over a certain WIFI channel, can be achieved.
In a possible implementation manner, the MCS index value used by the first device to send the first information is lower than or equal to the MCS index value used by the first device to send the first data information, and the second transmission power is less than or equal to the first transmission power. Because the signal-to-noise ratio that low order MCS needs is lower, consequently lower signal transmission power can satisfy the required signal-to-noise ratio of low order MCS to can guarantee the same stability simultaneously under the prerequisite that reduces the interference between WIFI equipment.
In one possible implementation, the method further includes: the method comprises the steps that first equipment determines first beam forming parameters adopted by first data information sent to second equipment; the first device sending the first information to the second device by using the second transmission power includes: the first device sends the first information to the second device by using the second transmitting power and the first beam forming parameter. The interference to other peripheral equipment when the first equipment sends the first information is reduced, and meanwhile, the signal strength when the first information reaches the second equipment is improved, and the reliability of the first information transmission is further improved.
In one possible implementation, the method further includes: the first device sends the first data information to the second device by adopting the first transmission power, and stores the first transmission power.
In one possible implementation, the control information includes at least one of an acknowledgement frame (ACK frame), a block acknowledgement frame (BA frame), a request to send frame (RTS frame), and a clear to send frame (CTS frame).
In one possible implementation, the management information includes at least one of an Authentication (Authentication) frame, a de-Authentication (Deauthentication) frame, and a Disassociation (Disassociation) frame.
In a second aspect, an information sending apparatus is provided, where the apparatus includes a processing module and a transceiver module, where the processing module is configured to determine a second transmit power according to a first transmit power, where the first transmit power is a transmit power used by the information sending apparatus to send first data information to a second device, and the second transmit power is less than or equal to the first transmit power; the transceiver module is configured to transmit first information to the second device using the second transmit power, where the first information includes at least one of control information and management information. The information sending device determines the sending power of the control information or the management information according to the sending power of the data information, so that the sending power of the data information is the upper limit of the sending power of the control information or the management information, the sending power of the device for sending the control information or the management information is effectively reduced, and further the mutual interference generated when wireless signals are sent among all devices is reduced. It is to be understood that the apparatus may only make the transmission power of the control information less than or equal to the transmission power of the data information, or may only make the transmission power of the management information less than or equal to the transmission power of the data information, or may make the transmission power of both the control information and the management information less than or equal to the transmission power of the data information, which may be specifically selected according to the corresponding requirements. Of course, the transmission power of the control information and the management information is smaller than or equal to the transmission power of the data information, so that the interference can be better reduced.
In a possible implementation manner, the MCS index value used by the transceiver module to send the first information is lower than or equal to the MCS index value used by the transceiver module to send the first data information, and the second transmission power is smaller than or equal to the first transmission power. Because the signal-to-noise ratio that low order MCS needs is lower, consequently lower signal transmission power can satisfy the required signal-to-noise ratio of low order MCS to can guarantee the same stability simultaneously under the prerequisite that reduces the interference between WIFI equipment.
In a possible implementation manner, the processing module is further configured to determine a first beamforming parameter used for sending the first data information to the second device; the transceiver module is further configured to transmit the first information to the second device using the second transmit power and the first beamforming parameter.
It is understood that details of the control information and the management information and other details can refer to the related description in the first aspect, and are not described herein again, and have the corresponding advantages described above.
In a third aspect, an information sending apparatus is provided, where the apparatus may be a first device or a chip in the first device. The apparatus has the function of implementing the first aspect described above in relation to the first device. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units corresponding to the above functions.
In one possible implementation manner, when the apparatus is a first device, the first device includes: a processor and a transceiver, the processor being configured to support the first device to perform respective functions of the above-described method, such as respective determining functions and other processing functions. The transceiver is used for supporting communication between the first device and the second device and transmitting corresponding information to the second device. Optionally, the first device may further comprise a memory, coupled to the processor, that stores program instructions and data corresponding to the first device.
The processor mentioned in any of the above mentioned embodiments may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the spatial multiplexing method in the above mentioned aspects.
In a fourth aspect, a computer-readable storage medium having instructions stored therein is provided, the instructions being executable by one or more processors on a processing circuit. When run on a computer, cause the computer to perform the method of the first aspect described above or any possible implementation thereof.
In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect described above or any possible implementation thereof. The computer program product may be stored in whole or in part on a storage medium packaged in the processor, or may be stored in whole or in part in a storage medium packaged outside the processor.
In a sixth aspect, a wireless communication system is provided, the system comprising the first device and the second device according to any of the above aspects.
In a seventh aspect, a communication apparatus for a WLAN device is provided, where the communication apparatus is configured to determine a second transmission power according to a first transmission power, where the first transmission power is used by the WLAN device to send first data information to a second device, and the second transmission power is less than or equal to the first transmission power; the communication device is further configured to output a second transmit power, the second transmit power being used to transmit the first information, the first information including at least one of control information and management information. The communication device may be a Media Access Control (MAC) chip or a baseband chip. Or a device including both the MAC chip and the baseband chip, for example, a WiFi chip including the MAC chip and the baseband chip may be used. In one implementation, the communication device outputs the second transmission power to the rf module, and the rf module transmits the first information using the second transmission power. It will be appreciated that the radio frequency module may exist independently of the communication device or may be integrated within the communication device.
Drawings
FIG. 1a is an exemplary diagram of a WLAN system according to an embodiment of the present invention;
FIG. 1b is another exemplary diagram of a WLAN system according to an embodiment of the present invention;
fig. 2 is an exemplary diagram of an information sending method according to an embodiment of the present invention;
fig. 3 is an exemplary flowchart of an information sending method according to another embodiment of the present invention;
fig. 4a is an exemplary flowchart of an information sending method according to another embodiment of the present invention;
fig. 4b is an exemplary flow chart of a method for sending a message according to another embodiment of the present invention;
FIG. 5a is a flowchart illustrating an example application scenario of FIG. 4 a;
FIG. 5b is a flowchart illustrating an example application scenario of FIG. 4 b;
FIG. 6 is an exemplary block diagram of an information sending device according to an embodiment of the invention;
fig. 7 is an exemplary block diagram of a communication device in accordance with an embodiment of the present invention.
Detailed Description
The scenario described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not limit the technical solution of the embodiment of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application belong to the protection scope of the present application.
First, some terms in the present application are explained to facilitate understanding by those skilled in the art.
1) A Station (STA) is a device having a wireless connection function and capable of providing voice and/or data connectivity to a user, and may also be referred to as a terminal device, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. Currently, some examples of sites include: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), a vehicle-mounted device, and the like.
2) An Access Point (AP) is a device for accessing a station to a wireless network in a communication system, and may also be referred to as a Radio Access Network (RAN) node (or device), a base station, and the like. Currently, some examples of access points are: a gbb, a Transmission Reception Point (TRP), an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), or a Wi-Fi access point device, or a home gateway device, or an Optical Network Unit (ONU) having a function of accessing a station to a wireless network, or an ONU that may also be referred to as a Wi-Fi access point legacy ONU, or other devices capable of accessing a station to a wireless network, or other interface devices capable of operating in a wireless environment.
3) Modulation and Coding Scheme (MCS), MCS Coding table is an expression proposed by IEEE 802.11 related standards to characterize the communication rate of WLAN. The MCS coding table uses various possible combinations of modulation modes and coding modes as table columns, and uses MCS index values as rows to form a rate table. Therefore, each MCS index value corresponds to a physical transmission rate under a set of parameters, and table 1 below lists an example of an MCS rate table with a bandwidth of 20MHz (see IEEE 802.11 related standard for a description of the overall rate).
TABLE 1 MCS corresponding speed table (20MHz)
It should be noted that the MCS index table shown in table 1 is only an example, and other forms are also possible.
4) Data information: the data information may also be referred to as a data frame, and is one type of information transmitted between devices in the embodiments described below. The first data information and the second data information in the following embodiments are applicable to distinguish similar objects, and are not used for describing a specific order or a sequential order. It is to be understood that the objects so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than described of illustrated herein. For the detailed description of the data information, reference may be made to the IEEE 802.11 series of related standards, which are not described in detail herein.
5) Control information: the control information may also be referred to as a control frame, and is one type of information transmitted between devices in the embodiments described below. The control information may include, for example, an Acknowledgement (ACK) frame, a Block Acknowledgement (BA) frame, a request-to-send (RTS) frame, a clear-to-send (CTS) frame, and the like. The control information may also include other types of frames, which may specifically refer to IEEE 802.11 series related standards, and will not be described herein again.
6) Management information: the management information may also be referred to as a management frame, and is one type of information transmitted between devices in the following embodiments. The management information may include, for example, an Authentication (Authentication) frame, a de-Authentication (Deauthentication) frame, a de-association (Disassociation) frame, and the like. The management information may also include other types of frames, which may specifically refer to IEEE 802.11 series related standards, and will not be described herein again.
7) The first information: the first information includes at least one of control information and management information. In one case, the first information includes only control information, in another case, the first information includes only management information, and in another case, the first information includes both control information and management information.
8) And second information: the second information includes at least one of control information and management information. In one case, the second information includes only control information, in another case, the second information includes only management information, and in another case, the second information includes both control information and management information.
9) And third information: the third information includes at least one of control information and management information. In one case, the third information includes only control information, in another case, the third information includes only management information, and in another case, the third information includes both the control information and the management information.
It is to be understood that the first information, the second information and the third information are applicable to distinguish similar objects, and are not used for describing a specific order or sequence. It is to be understood that the objects so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than described of illustrated herein.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical solutions of the embodiments of the present invention described below can be applied to a WLAN system. The WLAN system may include one or more APs, and one or more STAs, the "plurality" being at least two. As shown in fig. 1a, the system includes an AP1 and a STA1, STA1 being a station associated with AP 1. As shown in fig. 1b, the system includes two APs, AP2 and AP3, and further includes three STAs, STA2, STA3 and STA4, STA2 is a station associated with AP2, STA3 and STA4 are stations associated with AP3, and wireless communication is enabled between AP2 and AP 3. It is understood that the number of APs and STAs in the WLAN system is only exemplary and is not a limitation of the embodiments of the present application.
The first device described below may be the AP or the STA. The second device described below may be the AP or the STA. For example, in one embodiment, the first device is an AP1 and the second device is a STA 1. In another embodiment, the first device is a STA1 and the second device is an AP 1. In another embodiment, the first device is AP2 and the second device is AP 3. In yet another embodiment, the first device is STA1 and the second device is STA2, such as cell phone clone, cell phone screen projection, etc.
The information transmitted by the first device to the second device may include data information, control information, and management information.
When the first device sends information to the second device, the MCS index value adopted by the information is determined, the transmitting power adopted by the information is determined, and then the information is sent according to the coding modulation mode and the transmitting power corresponding to the determined MCS index value.
The lower the MCS index value used by the first device to transmit information, the greater the transmit power used by the first device to transmit the information. The first device may send the control information and the management information using a lower MCS index value, for example, the index value of the MCS may be 0 to 2, so the first device may always send the control information and the management information with a higher transmission power, and thus may generate interference to other surrounding devices.
In order to solve the problem, an embodiment of the present application provides an information sending method, where a first device determines a first transmission power used for sending data information to a second device, and then determines a second transmission power according to the first transmission power, where the second transmission power is smaller than or equal to the first transmission power, and then sends control information or management information to the second device using the second transmission power. And then the transmitting power of the first equipment for transmitting the control information and the management information to the second equipment is smaller than the transmitting power of the first equipment for transmitting the data information to the second equipment, so that the interference generated to other peripheral equipment when the first equipment transmits the control information or the management information can be effectively reduced.
Embodiments of the present application are further described below in conjunction with the more figures. Fig. 2 shows an information sending method provided in an embodiment of the present application. The method comprises the following steps:
step S101, the first device determines a first transmission power used for transmitting the first data information to the second device.
The first device determines the MCS index value used for sending the first data information first, and it may be understood that the MCS index value may be determined in an existing manner, which is not described herein again. Then, the first device determines the first transmission power according to the MCS index value, for example, a table corresponding to the MCS index value and the first transmission power is stored in the first device, and the first device searches for the first transmission power corresponding to the MCS index value by table lookup. In one example, in the correspondence table, the lower the MCS index value is, the higher the first transmission power is.
The first device may also determine the first transmit power using other heuristics. For example, the first device respectively sends the first information by using different transmission powers, and determines the transmission power with the minimum corresponding first information packet error rate as the first transmission power.
Step S102, the first device determines a second transmission power according to the first transmission power, wherein the second transmission power is smaller than or equal to the first transmission power.
The second transmission power can be equal to the first transmission power, the transmission power of the control information, the management information and the data information is the same, the control is simpler, and meanwhile the purpose of suppressing interference among different WIFI devices is achieved.
The second transmission power can be smaller than the first transmission power, and the purpose of better reducing interference between WIFI devices can be achieved by enabling the transmission power of the control information and the management information to be smaller than that of the data information.
The bandwidth occupied by the first information may be less than or equal to the bandwidth occupied by the first data information, and the second transmission power is less than or equal to the first transmission power. Therefore, on the premise of avoiding the power of the first information unit bandwidth from being too large, that is, on the premise of avoiding the power spectral density of the control information and the management information from being too large, the transmission power of the control information and the management information is simultaneously reduced, and the purpose of suppressing the interference between different WIFI devices is further achieved simultaneously. In one example, P2 ═ P1 × BW2/BW1, where P2 represents the second transmit power, P1 represents the first transmit power, BW2 represents the bandwidth of the first information, and BW1 represents the bandwidth of the first data information. In this example, the power spectral density of the first information (i.e., the control information or the management information) is made equal to the power spectral density of the first data information, thereby enabling interference equivalence over a certain bandwidth range, or over a certain WIFI channel.
In another embodiment, the MCS index value used by the first device to transmit the first information is lower than or equal to the MCS index value used by the first device to transmit the first data information, and the second transmit power is less than or equal to the first transmit power. Because the signal-to-noise ratio that low order MCS needs is lower, consequently lower signal transmission power can satisfy the required signal-to-noise ratio of low order MCS to can guarantee the same stability simultaneously under the prerequisite that reduces the interference between WIFI equipment.
Step S103, the first device sends first information to the second device by adopting the second transmitting power, wherein the first information comprises at least one of control information and management information.
In this embodiment, the first device uses the transmission power for sending the data information as the upper limit for sending the control information, or uses the transmission power for sending the data information as the upper limit for sending the management information, so as to effectively reduce the transmission power for the control information and/or the transmission power for the management information, and further reduce interference generated by the first device on other peripheral devices when sending the control information or the management information.
In an embodiment, referring to fig. 3, the method further comprises:
step S104, the first device determines a first beam forming parameter adopted by the first device for sending the first data information to the second device;
beamforming (beamforming) is a method of spatial filtering at the transmitting end to improve the signal-to-noise ratio (SNR) at the receiving end of the target. The detailed description of beamforming can refer to related standards of IEEE 802.11 series, and is not repeated herein. The beamforming parameters are a set of directional matrices (steering matrices) that can be measured explicitly or implicitly. For the detailed description of the Beamforming parameters, reference may be made to the Transmit Beamforming related section in the related standards of the IEEE 802.11 series, which is not repeated herein.
Step S103 includes: the first device sends the first information to the second device by using the second transmitting power and the first beam forming parameter. Since the first device transmits the first information by using the first beamforming parameter, which is the beamforming parameter used for transmitting the first data information, the energy of the transmitted beam can be directed to the receiving device (i.e. the second device) when the first information is transmitted, so that a higher signal-to-noise ratio can be obtained at the receiving device. In this embodiment, while reducing interference to other peripheral devices when the first device transmits the first information, the signal strength when the first information reaches the second device can be improved, thereby improving the reliability of the transmission of the first information.
In an embodiment, referring to fig. 4a and 4b, the method further comprises:
step S105, the first device transmits the first data information to the second device by using the first transmission power.
In one example, referring to fig. 4a, step S105 precedes step S103, and step S105 includes: the first equipment adopts the first transmission power to send the first data information to the second equipment, and saves the first transmission power. It should be noted that the order of step S102 and step S105 is not limited, and step S102 may be located before step S105, and step S102 may be located after step S105. Referring to fig. 5a, fig. 5a is a flowchart illustrating an example application scenario of fig. 4a, where the information sending method includes:
in step S201, the first device determines a first transmission power used for transmitting the first data information to the second device.
Step S202, the first device sends the first data information to the second device by adopting the first transmission power, and saves the first transmission power.
In step S203, the first device receives second information fed back by the second device, where the second information is at least one of control information or management information. The second information may be, for example, an ACK frame or a BA frame, which indicates whether the second device correctly receives the first data information.
Step S204, the first device determines a second transmission power according to the saved first transmission power, wherein the second transmission power is smaller than or equal to the first transmission power.
In step S205, the first device receives the second data information sent by the second device.
In step S206, the first device sends first information to the second device using the second transmission power, where the first information may be, for example, an ACK frame or a BA frame, and is used to indicate whether the first device correctly receives the second data information.
Details of each step in this example may refer to descriptions in the above embodiments, and are not described herein again, and have corresponding beneficial effects in the above embodiments.
In another example, referring to fig. 4b, step S105 follows step S103. Referring to fig. 5b, fig. 5b is a flowchart illustrating an example application scenario of fig. 4b, where the information sending method includes:
in step S301, the first device determines a first transmission power used for transmitting the first data information to the second device.
Step S302, the first device determines a second transmission power according to the first transmission power, wherein the second transmission power is less than or equal to the first transmission power.
In step S303, the first device sends first information to the second device by using the second transmission power, where the first information may be, for example, an RTS frame, and is used for the first device to request the second device to send data.
Step S304, the first device receives third information fed back by the second device, where the third information is at least one of control information or management information. The third information may be, for example, a CTS frame, for instructing the second device to allow the first device to transmit data.
Step S305, the first device transmits the first data information to the second device by using the first transmission power.
Step S306, the first device receives second information fed back by the second device, where the second information is at least one of control information or management information. The second information may be, for example, an ACK frame or a BA frame, which indicates whether the second device correctly receives the first data information.
In this example, step S301 may be performed simultaneously with step S302, or may be performed sequentially, that is, the step of determining the transmission power of the data information may be performed simultaneously with the step of determining the transmission power of the control information or the management information, or the transmission power of the data information is determined first, and then the transmission power of the control information or the management information is determined, which is the smallest change with respect to the existing information transmission procedure.
Details of each step in this example may refer to descriptions in the above embodiments, and are not described herein again, and have corresponding beneficial effects in the above embodiments.
Fig. 6 is a schematic block diagram of an information sending apparatus according to an embodiment of the present invention. The apparatus 400 may correspond to the first device described in the above embodiments and may have any of the functions of the first device in the above method embodiments. The apparatus 400 in the embodiment of the present application may be the first device, or may be a chip in the first device. The apparatus 400 may include a processing module 410 and a transceiver module 420, and optionally, the apparatus 400 may further include a storage module 430.
For example, the processing module 410 may be configured to determine the first transmit power and the second transmit power described in the above embodiments, and may also be configured to determine the first beamforming parameter. For example, the processing module 410 may perform the saving operations in steps S101, S102, S104, S201, S202, S204, S301, S302, and the like in the above-described respective embodiments. The storage module may also be configured to perform the saving operation in S202.
The transceiver module 420 is configured to perform a transmitting operation and a receiving operation. For example, the transceiver module 420 may be configured to perform the transmitting operations in steps S103, S105, and S202, S203, S205, S206, S303, S304, S305, and S306, and the like in the above embodiments.
It should be understood that the apparatus 400 according to the embodiment of the present application may correspond to the first device in each of the methods of the foregoing embodiments, and each of the modules in the apparatus 400 is not described herein again for brevity in order to implement the corresponding steps of each of the methods.
Alternatively, the apparatus 400 may be configured as a general purpose processing system, such as a chip, and the processing module 410 may include: one or more processors providing processing functionality; the transceiver module 420 may be, for example, an input/output interface, a pin or a circuit, and the input/output interface may be used to take charge of information interaction between the chip system and the outside, for example, the input/output interface may output the transmission control information generated by the first access point AP to other modules outside the chip for processing. The processing module 410 may execute computer-executable instructions stored in the memory module to implement the functionality of the first device in the above-described method embodiments. In an example, the storage module 430 optionally included in the apparatus 400 may be a storage unit within a chip, such as a register, a cache, and the like, and the storage module 430 may also be a storage unit located outside the chip, such as a read-only memory (ROM) or another type of static storage device that can store static information and instructions, a Random Access Memory (RAM), and the like.
The present invention further provides a communication device 500, and fig. 7 is a schematic block diagram of a communication device in an embodiment of the present invention. The communication device 500 may be the first device described in the above embodiments, and the communication device 500 may be configured to perform part or all of the functions of the first device in the above method embodiments. The communication device 500 may include: processor 510, baseband circuitry 530, rf circuitry 540, and antenna 550, optionally, the communication device 500 may also include memory 520. The various components of the communication device 500 are coupled together by a bus 560, where the bus system 560 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled in the figure as the bus system 560.
The processor 510 may be configured to perform the processing procedure related to the first device in the above method embodiments, for example, to determine the first transmit power and the second transmit power described in the above embodiments, and may also be configured to determine the first beamforming parameter, and the like. The processor 510 may also be used for other processes of the techniques described herein, may also run an operating system, be responsible for managing the bus, and may execute programs or instructions stored in memory, etc.
In one example, the transceiver module 420 in fig. 6 may include a baseband circuit 530, a radio frequency circuit 540, an antenna 550; the processing module 410 may be a processor 510; in another example, the transceiver module 420 in fig. 6 may include only the antenna 550 in fig. 7, and the processing module 410 may include both the processor 510, the rf circuit 540, and the baseband circuit 530; in yet another example, the processing module 410 in fig. 6 may include a processor 510 and a baseband circuit 530; transceiver module 420 may include radio frequency circuitry 540 and antenna 550.
It will be appreciated that fig. 7 only shows a simplified design of the first device. For example, in practical applications, the first device may comprise any number of transmitters, receivers, processors, memories, etc., and all first devices that may implement the present invention are within the scope of the present invention.
Embodiments of the present application also provide a computer storage medium having instructions stored therein, the instructions being executable by one or more processors on a processing circuit. Which when run on a computer causes the computer to perform the methods of the various aspects described above.
Embodiments of the present application further provide a chip system, which includes a processor, configured to support the distributed unit, the centralized unit, and the first device to implement the functions involved in the foregoing embodiments, such as generating or processing data and/or information involved in the foregoing methods.
In one possible design, the system-on-chip may further include a memory for storing necessary program instructions and data for the distributed unit, the centralized unit, and the first access point or the second access point. The chip system may be constituted by a chip, or may include a chip and other discrete devices.
The embodiments of the present application further provide a processor, coupled to the memory, for performing the method and functions related to the first device in any of the embodiments.
Embodiments of the present application further provide a computer program product containing instructions, which when executed on a computer, cause the computer to perform the method and functions related to the first device in any of the above embodiments.
An embodiment of the present application further provides a wireless communication system, which includes the first device and the second device mentioned in the foregoing embodiments.
The embodiment of the present application further provides a communication apparatus for a WLAN device, where the communication apparatus is configured to determine a second transmission power according to a first transmission power, where the first transmission power is a transmission power used by the WLAN device to send a first data message to a second device, and the second transmission power is less than or equal to the first transmission power; the communication device is further configured to output a second transmit power, the second transmit power being used to transmit the first information, the first information including at least one of control information and management information. The communication device may be a Media Access Control (MAC) chip or a baseband chip. Or a device including both the MAC chip and the baseband chip, for example, a WiFi chip including the MAC chip and the baseband chip may be used. In one implementation, the communication device outputs the second transmission power to the rf module, and the rf module transmits the first information using the second transmission power. It will be appreciated that the radio frequency module may exist independently of the communication device or may be integrated within the communication device. The WLAN device may be the STA or the AP. Alternatively, the WLAN device may be the first device or the second device.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the present application are generated, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk), among others.
In summary, the above description is only an example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (20)
1. An information sending method between WLAN devices, the method comprising:
the method comprises the steps that a first device determines a second transmission power according to a first transmission power, wherein the first transmission power is adopted by the first device to send first data information to a second device, and the second transmission power is smaller than or equal to the first transmission power;
and the first equipment adopts the second transmission power to send first information to the second equipment, wherein the first information comprises at least one of control information and management information.
2. The method of claim 1, wherein the bandwidth occupied by the first information is less than or equal to the bandwidth occupied by the first data information, and the second transmit power is less than or equal to the first transmit power.
3. The method of claim 2, wherein P2 is P1 is BW2/BW1, wherein P2 represents the second transmit power, P1 represents the first transmit power, BW2 represents a bandwidth of the first information, and BW1 represents a bandwidth of the first data information.
4. The method of any of claims 1 to 3, wherein the first device transmits the first information with a Modulation and Coding Scheme (MCS) index value that is lower than or equal to the MCS index value with which the first device transmits the first data information, and wherein the second transmit power is less than or equal to the first transmit power.
5. The method of any of claims 1 to 4, further comprising:
the first device determines a first beam forming parameter adopted by the first device for sending the first data information to the second device;
the sending, by the first device, the first information to the second device by using the second transmission power includes: and the first equipment adopts the second transmitting power and the first beam forming parameter to send the first information to the second equipment.
6. The method of any of claims 1 to 5, further comprising:
and the first equipment adopts the first transmission power to send first data information to the second equipment, and stores the first transmission power.
7. The method of any one of claims 1 to 6, wherein the control information comprises at least one of an acknowledgement frame (ACK frame), a block acknowledgement frame (BA frame), a request to send frame (RTS frame), and a clear to send frame (CTS frame).
8. The method of any of claims 1 to 6, wherein the management information comprises at least one of an Authentication (Authentication) frame, a de-Authentication (Deauthentication) frame, and a de-association (Disassociation) frame.
9. An information transmitting apparatus for a WLAN, the apparatus comprising:
the processing module is used for determining second transmission power according to first transmission power, wherein the first transmission power is adopted by first equipment for sending first data information to second equipment, and the second transmission power is smaller than or equal to the first transmission power;
and the transceiver module is configured to send first information to the second device using the second transmission power, where the first information includes at least one of control information and management information.
10. The apparatus of claim 9, wherein the first information occupies a bandwidth that is less than or equal to a bandwidth occupied by the first data information, and the second transmit power is less than or equal to the first transmit power.
11. The apparatus of claim 10, wherein P2 ═ P1 ═ BW2/BW1, wherein P2 represents the second transmit power, P1 represents the first transmit power, BW2 represents the bandwidth of the first information, and BW1 represents the bandwidth of the first data information.
12. The apparatus of any of claims 9 to 11, wherein a modulation and coding scheme, MCS, index value used by the first device to send the first information is lower than or equal to an MCS index value used by the first device to send the first data information, and the second transmit power is less than or equal to the first transmit power.
13. The apparatus of any of claims 9 to 12,
the processing module is further configured to determine a first beamforming parameter used for sending the first data information to the second device;
the transceiver module is further configured to send the first information to the second device by using the second transmit power and the first beamforming parameter.
14. The apparatus of any one of claims 9 to 13,
the transceiver module is further configured to transmit first data information to the second device using the first transmit power;
the apparatus also includes a storage module configured to store the first transmit power.
15. The apparatus of any one of claims 9 to 14, wherein the control information comprises at least one of an acknowledgement frame (ACK frame), a block acknowledgement frame (BA frame), a request to send frame (RTS frame), and a clear to send frame (CTS frame).
16. The apparatus of any of claims 9 to 15, wherein the management information comprises at least one of an Authentication (Authentication) frame, a de-Authentication (Deauthentication) frame, and a de-association (Disassociation) frame.
17. A communication apparatus for a WLAN device, wherein the communication apparatus is configured to determine a second transmission power according to a first transmission power, where the first transmission power is used by the WLAN device to send a first data message to a second device, and the second transmission power is smaller than or equal to the first transmission power;
the communication device is further configured to output the second transmit power, which is used to transmit first information, the first information including at least one of control information and management information.
18. The communications apparatus of claim 17, P2 ═ P1 ═ BW2/BW1, wherein P2 represents the second transmit power, P1 represents the first transmit power, BW2 represents the bandwidth of the first information, and BW1 represents the bandwidth of the first data information.
19. A WLAN system comprising an information transmission apparatus according to any one of claims 9 to 16 and a second device according to any one of claims 9 to 16.
20. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 8.
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