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WO2013037228A1 - Procédé d'indication de mode silencieux, procédé d'émission de données et dispositif en mode silencieux - Google Patents

Procédé d'indication de mode silencieux, procédé d'émission de données et dispositif en mode silencieux Download PDF

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Publication number
WO2013037228A1
WO2013037228A1 PCT/CN2012/077477 CN2012077477W WO2013037228A1 WO 2013037228 A1 WO2013037228 A1 WO 2013037228A1 CN 2012077477 W CN2012077477 W CN 2012077477W WO 2013037228 A1 WO2013037228 A1 WO 2013037228A1
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WIPO (PCT)
Prior art keywords
silent
frequency band
field
silence
service set
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/077477
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English (en)
Chinese (zh)
Inventor
张兴新
王学寰
高磊
刘孟红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2013037228A1 publication Critical patent/WO2013037228A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a silent mode indication method, a data transmission method and apparatus in a silent mode.
  • the Basic Service Set is a basic component of a wireless LAN. It consists of a station (Station, hereinafter abbreviated as STA) that is within a certain coverage area and has some association.
  • STA station
  • the most basic form of site association in BSS is that terminals or sites communicate directly with each other in an ad hoc network. This most basic form of BSS is also known as the Independent Basic Service Set (IBSS). IBSS is not common in the site association form of BSS.
  • the common form of site association in BSS is that each STA is associated with a central site of a full-time management basic service set. This central site is called an access point (AP, Access). Point ), and the BSS built around the AP is called the BSS with infrastructure.
  • BSS with basic implementation can be interconnected by their APs through a Distributed System (DS) to enable communication between terminals in different BSSs with basic implementation.
  • DS Distributed System
  • DFSO Dynamic Frequency Selection Owner
  • the DFSO sends a Quiet Element (QE) to the STA of the BSS, and the QE indicates the corresponding parameters of the upcoming silence.
  • QE Quiet Element
  • the "Length” field (occupying 1 byte) is used to indicate how many octets there are after the length field;
  • the "Quiet Count” field (occupying 1 byte), used to indicate how many target beacon transmission times after the silent start time point of the silence time;
  • Quadet Period (occupying 1 byte), used to indicate whether the silence is periodic silence or non-periodic silence. When the value is "0", it indicates that the silence is a one-time silence. When the value is not 0, it indicates that the silence is periodic silence, and the period of silence is the multiple target beacon transmission time corresponding to the value;
  • the "Quiet Duration” field (occupying 2 bytes) is used to indicate the duration of a silent duration
  • “Quiet Offset” field (occupying 2 bytes), used to indicate how long after the silent time start time point is after the target beacon transmission time indicated by the Quiet Count field, the silence offset field corresponds to The duration is shorter than 1 target beacon transmission time interval.
  • the silent count field, the silent offset field, and the silence duration field together may indicate a silent start time, an end time, and a duration of the silent time.
  • the STA that receives the silent element will remain silent for the corresponding time according to the relevant parameters in the silent element, such as the contents of the "silent count, silence offset, and silence duration" fields.
  • the inventor of the present invention has found through long-term research and practice that the silent indication method provided by the above prior art has the drawback that once the STA receives the silence element, the STA will remain silent throughout the working frequency band, but in fact, not all silences are needed.
  • the measurement of interference and noise is performed on the entire operating band. In this case, part of the operating band that does not need to be measured is still usable. Therefore, the quiet indication method provided by the prior art does not have a high utilization rate of the operating band.
  • Embodiments of the present invention provide a silent mode indication method, a data transmission method and a device in a silent mode, to fully utilize frequency band resources, and improve a transmission rate of the system.
  • the embodiment of the invention provides a silent mode indication method, and the method includes: Sending a silent element message to a site within the basic service set, so that the site within the basic service set learns the quiet time available working frequency band according to the silent element message, does not send data during the silent time, or sends data by using the available working frequency band ;
  • the silence element message includes at least one frequency band field, the content of the frequency band field being used to indicate a quiet time of a station available working band or an unavailable working band within the basic service set.
  • An embodiment of the present invention provides a data transmission method in a silent mode, where the method includes: receiving, in a basic service set, a silent element message, where the silent element message includes at least one frequency band field, and the content of the frequency band field is used to indicate Silent time, the available service band or the unavailable working band of the site within the basic service set;
  • the station learns the quiet time available working frequency band according to the silence element message, does not transmit data at the silent time, or transmits data using the available working frequency band indicated by the frequency band field.
  • the embodiment of the present invention provides a silent mode indication device, where the device is a basic service set central site, and the device includes:
  • a sending module configured to send the silent element message to a site in the basic service set, so that the site in the basic service set learns the quiet time available working frequency band according to the silent element message, and does not send data or use during the silent time Data can be sent in the working frequency band;
  • the silence element message includes at least one frequency band field, the content of the frequency band field being used to indicate a quiet time of a station available working band or an unavailable working band within the basic service set.
  • the embodiment of the present invention provides a data transmission device in a silent mode, where the device is a basic service set site, and the device includes:
  • a receiving module configured to receive a silent element message, where the silent element message includes at least one frequency band field, where the content of the frequency band field is used to indicate a quiet time, a site available working frequency band or an unavailable working frequency band in the basic service set;
  • a data sending processing module configured to learn, according to the silent element message received by the receiving module, a quiet time available working frequency band, not transmitting data at the silent time or transmitting data by using an available working frequency band indicated by the frequency band field.
  • the silent mode indication method causes the intra-station in the basic service set to send data on the available working frequency band during the silent time, compared with the prior art indicating that the internal service set prohibits the use of the entire working frequency band in the silent service time. Make full use of the band resources and increase the transmission rate of the entire system.
  • FIG. 1 is a schematic diagram of a frame structure of a silent element message provided by the prior art
  • FIG. 2 is a schematic flowchart of a silent mode indication method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a frame structure of a silent element message according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a frame structure of a silent element message according to another embodiment of the present invention
  • FIG. 4 is a schematic diagram showing an indication of an available working frequency band in a silent element message using an 8-bit binary value provided by an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a frame structure of an extended silence element message according to another embodiment of the present invention
  • FIG. 6 is a schematic diagram of sending a silent element message to a site of a basic service set according to an embodiment of the present invention
  • FIG. 7 is a schematic flowchart of a data transmission method in a silent mode according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of a data transmission method in a silent mode according to another embodiment of the present invention
  • FIG. 9 is a silent mode according to an embodiment of the present invention
  • Schematic diagram of the indicating device
  • FIG. 10 is a schematic structural diagram of a silent mode indication device according to another embodiment of the present invention
  • FIG. 11 is a schematic structural diagram of a data transmission device in a silent mode according to an embodiment of the present invention
  • Schematic diagram of the data transmission system structure
  • An embodiment of the present invention provides a silent mode indication method, where an execution subject may be a DFSO of a dynamic bandwidth selection mechanism, and the DFSO is usually served by a basic service set central site or an access point (AP), without basic services.
  • a central site or access point When a central site or access point is set, it can also be served by a site within the basic service set.
  • the method includes transmitting a silent element message to a site within a basic service set such that a site within the basic service set learns a quiet time available working frequency band according to the silent element message, does not transmit data or uses an available working frequency band during the silent time Transmitting data, the silence element message includes at least one frequency band field, the content of the frequency band field being used to indicate a quiet time of a station available working frequency band or an unavailable working frequency band within the basic service set.
  • the execution subject may be a basic service set central station, for example, an access point (AP).
  • the silent mode indication method illustrated in FIG. 2 mainly includes the steps:
  • S201 Send a silent element message to a site in the basic service set, so that the site in the basic service set learns the quiet time available working frequency band according to the silent element message, does not send data during the silent time, or uses the available working frequency band to send data. .
  • the site within the basic service set can still use part of the operating band to transmit data on some of the available operating bands.
  • the original system used a working frequency band of 20MHz or 40MHz.
  • the maximum bandwidth of the working band can reach 160MHz.
  • part of the channel is affected by interference and noise, resulting in a decrease in system transmission rate.
  • the silent element message is sent to the site within the basic service set, that is, when part of the operating band of the system is affected by interference and noise, the DFSO of the basic service set is The interference and noise conditions on the part of the operating band are measured, and the silence element message indicates which bandwidths are available for the silence time.
  • the STA transmits data on the available frequency band, avoiding the waste of available frequency band resources caused by the full-band silence in the prior art.
  • the indication of the available working frequency band of the site in the silent time basic service set is encapsulated in the silent element message, and the indication of the available working frequency band is used to indicate which working frequency bands are available to the site in the basic service set during the silent time. , or indicate which operating bands are not available to the site within the basic service set for silent time.
  • the available working frequency band of the site within the basic service set is the entire working frequency. Part of the band, which is not available to the working band in the basic service set, for example, the working band (for example, the operating band affected by interference and noise) that the AP needs to measure within the basic service set constitutes the entire operating band.
  • S202 Receive data sent by the site in the basic service set using an available working frequency band.
  • the basic service set central station measures the unavailable operating band, for example, the operating band affected by interference and noise.
  • the silent element message may be sent to the intra-site service set by sending a broadcast frame, a multicast frame, or a unicast frame, where the broadcast frame may be a beacon frame (Beacon)
  • the multicast frame may be a multi-user data frame.
  • the unicast frame may be a probe response frame or a single-user data frame, that is, a broadcast beacon frame, a unicast probe response frame, and a single frame.
  • the foregoing silent element message encapsulating the indication of the available working frequency band is carried in the beacon frame, the probe response frame, the single-user data frame or the multi-user data frame, and sent To the site within the basic service set.
  • the silent element message is sent in the multicast frame or the unicast frame mode
  • the corresponding basic service set site is required to provide feedback.
  • the silence element message includes at least one band (Band) field, and the indication of the available working frequency band of the site within the quiet time basic service set is filled into the at least one band field.
  • band (Band) field occupying 1 byte
  • the one frequency band field and other fields in the silence element message for example, a Quiet Count field (occupying 1 byte), a Quiet Period field (occupying 1 byte), and a silence bias
  • the Quiet Offset field occupying 2 bytes
  • the Element ID field occupying 1 byte
  • the Quiet Duration field occupying 2 bytes
  • Length field occupying 1 byte
  • Silent count field, silent period field, silent offset field, silent identification field, silent duration field, and length field For FIG. 3a, if the silence indicated by the silence element message (indicated by the silent period field of the silence element message, for example, the field is "1") is periodic silence, the silent element message illustrated in FIG. 3a may also include The Quiet Times field (occupying 1 byte), as shown in Figure 3b. The content of the silence count field exemplified in Figure 3b is used to indicate how many times the periodic silence has passed to stop silence.
  • the frequency band field and the silence number field are not necessarily located after the silence offset field of the silent element message, and may be any position after the length field in the silent element message, FIG. 3a and attached Figure 3b is only an illustrative illustration.
  • the adding at least one frequency band field in the silence element message is to add a plurality of frequency band fields in the silence element message, implementing an indication of filling the at least one frequency band field as an indication of a site available working frequency band within the quiet time basic service set For example, when the silent element message adds a plurality of frequency band fields (each frequency band occupies 1 byte) and other group groups whose number of groups is equal to the number of the plurality of frequency band fields, the silent time basic service is used.
  • the plurality of indications of the working frequency band of the in-set station are respectively filled into the plurality of frequency band fields, wherein each of the other fields of the other field group includes a silent count field, a silent period field, a silence duration field, and a silence offset a field, that is, the extended silent element message includes other field groups whose number of groups is equal to the number of the plurality of frequency band fields, and each of the other fields of the other field group includes a silent count field, a silent period field, and a silent duration a time field and a silence offset field, the plurality of frequency band fields and the other field group forming a Silent elements of the message. As shown in FIG.
  • an extended silent element message may indicate multiple silences, that is, when multiple silences are indicated, only one silent element message needs to be sent to the site within the basic service set, which is reduced when indicating the same number of silences as compared with the prior art. The number of silent element messages is sent, which improves system efficiency and resource utilization.
  • the frequency band field field is not necessarily located after the silence offset field of the silent element message, and may be any position after the length field in the silent element message.
  • FIG. 5 is only an example description. .
  • the band field may be represented by a binary value, such as an 8-bit binary value, indicating a quiet time of the available service band or the unavailable working band in the basic service set, that is, the band field is filled with an 8-bit binary value.
  • Each 8-bit binary value corresponds to the available working frequency band or the unavailable working frequency band in the basic service set of the silent time.
  • Table 1 the brackets in the table indicate the corresponding binary values converted to decimal values), except for the decimal values 4 to 255 reserved for future reuse, the decimal values 0, 1, 2, and 3 indicate that no work is available.
  • the operating band is the entire operating band, the band outside the main 20 MHz (megahertz) channel, the band outside the main 40 MHz (megahertz) channel, and the secondary 80 MHz (megahertz) channel.
  • the decimal values 0, 1, and 2 indicate that there is no available operating band.
  • the main 80MHz (megahertz) channel is available and the auxiliary 80MHz (megahertz) channel is available.
  • the corresponding unavailable working frequency band is the entire working frequency band, respectively.
  • the decimal values 0 and 255 indicate that there is no available operating band and The main 80 MHz (megahertz) channel, at this time, the corresponding unavailable operating frequency band (for example, the frequency band that needs to be tested due to interference and noise) is the entire operating frequency band and the auxiliary 80 MHz (megahertz) channel, respectively.
  • the decimal values 0, 1, 2, 3, and 4 indicate There are no available operating bands, a primary 20MHz (megahertz) channel, a primary 40MHz (megahertz) channel, a primary 80MHz (megahertz) channel, and a secondary 80MHz (megahertz) channel, in which case the corresponding unavailable operating band (eg, subject to The frequency band that needs to be tested due to interference and noise effects) is the entire operating frequency band, the main 20MHz A frequency band other than the (megahertz) channel, a frequency band other than the main 40 MHz (megahertz) channel, a secondary 80 MHz (megahertz) channel, and a main 80 MHz (megahertz) channel.
  • the corresponding unavailable operating band eg, subject to The frequency band that needs to be tested due to interference and noise effects
  • the maximum supported channel bandwidth of the basic service set reaches 160 MHz (megahertz).
  • the 160 MHz channel can be a continuous 160 MHz channel or two consecutive 80 MHz channels.
  • the 160MHz channel is divided into two 80MHz channels, one of which is called the primary 80MHz channel and the other is called the secondary 80MHz channel;
  • the main 80MHz channel is divided into two 40MHz channels, one of which is called the main The 40MHz channel, the other is called the secondary 40MHz channel;
  • the main 40MHz channel is divided into two 20MHz channels, one of which is called the primary 20MHz channel and the other is called the secondary 20MHz channel.
  • the band field may also indicate, by means of a bitmap (Bitmap), the station available working band or the unavailable working band within the basic service set.
  • Bitmap Bitmap
  • an 8-bit binary value is used to indicate an indication of the available operating band, that is, a binary value is filled in the band field, and " ⁇ " in each binary value corresponds to the available working frequency band of the site in the basic service set.
  • "0" corresponds to the working frequency band of the site in the basic service set of the silent time, or, conversely, the "0" in each binary value corresponds to the available working frequency band of the site in the basic service set of the silent time, " ⁇ indicates the silent time accordingly.
  • the operating band is not available in the base service set site. For example, assuming the binary value of the band field is 11110000, it means that the first 4 channels of the silence time are available. It is easy to understand, there are other combinations, here is just an example.
  • the band field The content may also indicate that the site is not available in the basic service set, and accordingly, the operating band outside the unavailable operating band is the available operating band. Therefore, the site within the basic service set can know the available operating band based on the indication of the unavailable operating band.
  • the silent mode indication method exemplified in FIG. 2 above that since the silent element message can be sent to the inner service set site, the silent element message includes at least one frequency band field, and the content of the frequency band field is used to indicate the basic time of the silence time.
  • the working frequency band is available for the site within the service set. Therefore, the silent mode indication method provided by the embodiment of the present invention causes the intra-station in the basic service set to send data on the available working frequency band during the silent time, compared with the prior art indicating that the internal service set prohibits the use of the entire working frequency band in the silent service time. Make full use of the band resources and increase the transmission rate of the entire system.
  • Figure 6 is a schematic diagram of a message for sending a silent element to a site within a basic service set according to an embodiment of the present invention.
  • the access point AP acts as a DFSO, and can carry the silent element message in a beacon frame, a probe response frame, or a data frame Dataj3 ⁇ 4 (Data frame).
  • the site of the base service set sends a silent element message.
  • the base service set site 1 (STA1) and the basic service set site 2 (STA2) respectively save the silence element message after receiving the beacon frame
  • the corresponding parameter indicated by each field for example, the station 3 (STA3) in the basic service set sends a probe request frame to the AP, and after receiving the probe request frame, the AP feeds back the probe response frame to the STA3.
  • the AP informing the corresponding parameter represented by each field in the site 3 (STA3) silent element message in the basic monthly service set; for example, the AP may also be sent in the data frame of the station 2 (STA2) in the basic service set.
  • STA2 Carry a silent element message and request site 2 (STA2) feedback in the basic service set.
  • Site 2 ( STA2 ) in the basic service set feeds the Block Acknowledge frame (BA) or Acknowledge frame (ACK) to the AP. ), BA/ACK is used to feedback to the AP whether the corresponding data and information are correctly demodulated.
  • BA Block Acknowledge frame
  • ACK Acknowledge frame
  • the AP can only receive data and does not send data, that is, in the silent time, except for the basic service.
  • the AP does not send any data or feed back the received data, for example, send a probe response frame to the site within the basic service set; on the other hand, at silent time, basic
  • the service set site (STA) can also be barred from requesting the AP to Feedback from sites within the basic service set.
  • FIG. 7 is a schematic flowchart of a data transmission method in a silent mode according to an embodiment of the present invention, which mainly includes the following steps:
  • the site within the basic service set receives a silent element message.
  • the silent element message received by the site in the basic service set is extended by the original silence element message, and the extended silence element message includes at least one frequency band field, and the content of the frequency band field is used to indicate the silence time.
  • the available service band or the unavailable working band in the basic service set is as shown in FIG. 3 or FIG. 5, wherein the meaning of the available working band or the unavailable working band has been explained in the foregoing embodiment, and is not used here. Praise.
  • the function or meaning of the silent count field, the silent period field, the silence offset field, the silence identification field, the silence duration field, and the length field, etc. as exemplified in FIG. 3 or FIG. 5, respectively, and the silent count field mentioned in the background art of the present invention
  • the functions or meanings of the silent period field, the silent offset field, the silent identification field, the silence duration field, and the length field are the same, and are not mentioned here.
  • the extended silence element message is sent by the basic service set central site, e.g., the access point AP, by transmitting a broadcast frame, a multicast frame, or a unicast frame to the site within the basic service set.
  • a broadcast beacon frame e.g., a unicast probe response frame, a single user data frame, or a multicast multi-user data frame
  • the foregoing package has an indication of an available working frequency band.
  • the extended silence element message is carried in the beacon frame, probe response frame, single user data frame or multi-user data frame, and sent to the intra-service set in the basic service set.
  • the quiet element message is sent in the multicast frame or the unicast frame mode, in this embodiment, it may be performed when the number of sites in the basic service set is small or only one basic service set site is included. At the same time, the corresponding basic service set site is required to provide feedback.
  • the base service set site learns the quiet time available working frequency band according to the silent element message, and does not send data during the silent time or sends data by using the available working frequency band indicated by the frequency band field.
  • the term "transmission opportunity” refers to a certain access type (AC) of an STA or an AP, and a length of time for transmitting the AC is obtained. This duration is called a transmission opportunity ( Transmit Opportunity, TXOP).
  • TXOP Transmission Opportunity
  • the transmission opportunity obtained by the site in the basic service set overlaps with the silence time indicated by the silence count field, the silence offset field, and the silence duration field carried in the silent element message, The intra-sense service set station transmits data using the indicated available working frequency band at the overlapping time, otherwise, no data is transmitted at the silent time.
  • the access point AP serves as the DFSO of the basic service set, and broadcasts a silent element message by broadcasting a beacon frame, and arranges three silences.
  • Site 1 (STA1) in the basic service set, Site 2 (STA2) in the basic service set, and Site 3 (STA3) in the basic service set each save the silence element message (a silent element message) required for silence three times after receiving the beacon frame.
  • Site 1 (STA1) in the basic service set acquires a TXOP, and the TXOP partially overlaps with the first silent silence duration.
  • the base service set site 1 (STA1) obtains an opportunity to transmit data at an overlapping time at which the data is transmitted to the AP using the available working frequency band indicated by the available band (Band) field in the silence element message.
  • Site 2 (STA2) in the basic service set obtains a TXOP, and the TXOP partially overlaps with the silence duration of the second silence.
  • the base service set site 2 (STA2) obtains an opportunity to transmit data at an overlapping time at which the data is transmitted to the AP using the available working frequency band indicated by the available Band field in the silence element message.
  • the station transmits data using the full band.
  • the base service set 3 gets the TXOP, and the TXOP contains the third silent silence duration.
  • Site 3 (STA3) in the basic service set sends data to the AP at the quiet time using the available working band indicated by the Band (Band) field in the Silent Element message.
  • the AP in the embodiment of the data transmission method in the silent mode shown in FIG. 8, in the silent time, the AP can only receive data and does not send data, that is, the AP does not perform any data transmission during the silent time. Or feedback on the received data, for example, sending a probe response frame to a site within the basic service set, etc.
  • the base service set STA can also be It is forbidden to ask the AP to provide feedback to the site.
  • the data transmission method in the silent mode illustrated in FIG. 8 since the intra-base service set station can transmit data using the available working frequency band at the silent time according to the obtained transmission opportunity and the extended silent element message sent by the basic service set central station. . Therefore, the data transmission method in the silent mode provided by the embodiment of the present invention enables the station in the basic service set to transmit data in the available working frequency band during the silent time, fully utilizes the frequency band resource, and improves the transmission rate of the entire system.
  • FIG. 9 is a schematic structural diagram of a silent mode indication device according to an embodiment of the present invention.
  • the device may be a central site of a basic service set, such as an access point AP or the like.
  • the silent mode indicating device illustrated in FIG. 9 includes a sending module 901, configured to send a silent element message to a site within the basic service set, so that the site within the basic service set learns the silent time according to the obtained transmission opportunity and the silent element message.
  • An available working frequency band in which data is not transmitted or transmitted using an available working frequency band, the silent element message including at least one frequency band field, the content of the frequency band field being used to indicate a quiet time, the site within the basic service set is available Operating band or unavailable operating band.
  • the available working frequency band in the basic service set is part of the entire working frequency band, and it is not available in the working frequency band of the basic service set.
  • the working frequency band that the AP needs to measure in the basic service set constitutes the entire working frequency band.
  • the sending module 901 may send the silent element message to the intra-site service set by sending a broadcast frame, a multicast frame, or a unicast frame, where the broadcast frame may be The beacon frame, the multicast frame may be a multi-user data frame, and the unicast frame may be a probe response frame or a single-user data frame, that is, when an operating band that is not available (for example, an operating band affected by interference and noise) needs to be performed.
  • the foregoing extended silence element message encapsulating an indication of available working frequency band is carried in the beacon by means of a broadcast beacon frame, a unicast probe response frame, a single user data frame or a multicast multi-user data frame.
  • a frame, a probe response frame, a single user data frame, or a multi-user data frame is sent to the site within the basic service set.
  • each functional module is merely an example.
  • the foregoing functions may be considered according to requirements, such as configuration requirements of corresponding hardware or convenience of implementation of software.
  • the allocation is performed by different functional modules, that is, the internal structure of the silent mode indicating device is divided into different functional modules to complete all of the above description or Some features.
  • the corresponding functional modules in this embodiment may be implemented by corresponding hardware, or may be executed by corresponding hardware.
  • the foregoing sending module may have the foregoing basic service set.
  • the hardware that the internal station sends the silent element message function, such as the transmitter may also be a general processor or other hardware device capable of executing the corresponding computer program to perform the aforementioned functions (the various embodiments provided in the present specification may apply the above described principles).
  • the at least one band field may be padded to the at least one band field by adding at least one band field in the silence element message to the at least one band field.
  • the band field and silence duration fields and other fields in the silence element message form an extended silent element message, and other fields in the silence element message include a silence count field, a silent period field, a silence duration field, and a silence bias
  • the function or meaning of the shift field here the silent count field, the silent period field, the silence offset field, the silence identification field, the silence duration field, and the length field, respectively, and the silent count field, silent period mentioned in the background of the present invention, respectively Fields, Silent Offset Fields, Silent ID Fields, Silent Duration Fields, and Length Fields have the same function or meaning, and are not mentioned here.
  • At least one band (Band) field may be added to the silence element message (equivalent to adding one field), for example, only one band field is added.
  • the at least one frequency band field and other fields in the silence element message for example, Quiet Count, Quiet Period, Quiet Duration, Quiet Offset, Silence
  • the Element (Element ID) and Length (Length) fields form an extended silent element message.
  • the silent element message illustrated in FIG. 3a may also include The Quiet Times field, as shown in Figure 3b.
  • the content of the silence count field exemplified in Figure 3b is used to indicate how many times the periodic silence has passed to stop silence.
  • an embodiment of filling the at least one band field with an indication of the site available operating band within the quiet time basic service set may be
  • the silence element message adds a plurality of frequency band fields and other field groups whose number of groups is equal to the number of the plurality of frequency band fields, and respectively fills the plurality of indications of the available working frequency bands in the silent time basic service set to the plurality of Band field, where the other
  • Each group of other fields of the field group includes a silence count field, a silent period field, a silence duration field, and a silence offset field, that is, the extended silence element message includes the number of groups equal to the number of the plurality of frequency band fields.
  • each of the other fields of the other field group includes a silent count field, a silent period field, a silence duration field, and a silence offset field, and the added plurality of frequency band fields and the other field group form a An extended silent element message.
  • a silent count field As shown in FIG. 5, if two band fields, such as the Band 1 (Band) field and the Band 2 (Band2) field, are added in the Silent Element message, correspondingly, two other fields are added in the Silent Element message, including the silent count.
  • Quiet Countl Quiet Period1, Quiet Durationl, Quiet Offsetl field (the first group of other fields), and Quiet Count2, Quiet Period 2 ( Quiet Period 2 ), Quiet Duration 2, Quiet Offset 2 field (other groups in the second group).
  • the added frequency band field and the silence number field are not necessarily located after the silence offset field of the silence element message, and may be any position after the length field in the silence element message.
  • the band field may be represented by a binary value, such as an 8-bit binary value, indicating a quiet time of the available service band or the unavailable working band in the basic service set, that is, the band field is filled with an 8-bit binary value.
  • Each 8-bit binary value corresponds to the available working band or the unavailable working band of the site of the quiet time basic service set.
  • Table 1 the brackets in the table indicate the corresponding binary values converted to decimal values), except for the decimal values 4 to 255 reserved for future reuse, the decimal values 0, 1, 2, and 3 indicate that no one is available.
  • the operating band is the entire operating band, the band outside the main 20 MHz (megahertz) channel, the band outside the main 40 MHz (megahertz) channel, and the auxiliary 80 MHz (megahertz) channel.
  • the band field may also indicate, by a bitmap (Bitmap), the site available or unusable operating band within the basic service set.
  • Bitmap Bitmap
  • the value of the bit binary represents an indication of the available operating band, ie the binary field value is filled in the band field, and the "1" in each binary value corresponds to the working frequency band available to the station in the basic service set of the silent time,
  • “1” corresponds to the unusable working band of the site within the basic service set of the silent time. For example, assuming the binary value of the working band field is 11110000, it means that the first 4 channels of the silence time are available. It's easy to understand, there are other combinations, here is just an example.
  • the added multiple frequency band fields share one element ID and Length field with the other field groups, that is, the added multiple frequency band fields and the other The field group constitutes one of the extended silent element messages.
  • an extended silence element message may indicate multiple silences, that is, when multiple silences are indicated, only one silent element message needs to be sent to the site within the basic service set, which is reduced when indicating the same number of silences as compared with the prior art. The number of silent element messages is sent, which improves system efficiency and resource utilization.
  • the sending module 902 of the example shown in FIG. 9 is specifically configured to send the silent element message to a site of the basic service set by sending a broadcast frame, a multicast frame, or a unicast frame, where the broadcast frame may be a beacon.
  • a beacon frame may be a multi-user data frame.
  • the unicast frame may be a probe response frame or a single-user data frame, and may be a multicast frame or a unicast frame.
  • the case of sending the silent element message may be performed in the embodiment, when the number of sites in the basic service set is small or only one basic service set site is located, and at the same time, the corresponding basic service is required. In-set sites for feedback. Refer to Figure 6 and its text for details, and no further details are given here.
  • the silent mode indicating device illustrated in FIG. 9 further includes a data receiving module 1001, such as the silent mode indicating device provided by another embodiment of the present invention as shown in FIG.
  • the data receiving module 1001 is configured to receive data sent by the site within the basic service set using the available working frequency band.
  • the silent mode indicating device ie, AP
  • the site within the basic service set that receives the silent element message carrying the working band field can still be
  • the data can be transmitted on the working frequency band (ie, the operating frequency band that is not affected by interference and noise), and interacts with the silent mode indicating device (ie, the AP).
  • the data receiving module 1001 can receive the basic service set.
  • the internal site uses data that can be sent over the available working band.
  • FIG. 11 is a schematic structural diagram of a data transmission apparatus in a silent mode according to an embodiment of the present invention.
  • the device can be a station of a basic service set. For the convenience of description, only parts related to the embodiment of the present invention are shown.
  • the data transmission apparatus in the silent mode illustrated in Fig. 11 includes a receiving module 1101 and a data transmission processing module 1102, wherein:
  • the receiving module 1101 is configured to receive a silent element message.
  • the silence element message includes at least one frequency band field, where the content of the frequency band field is used to indicate a quiet working time of a site available working frequency band or an unavailable working frequency band in the basic service set, where the silent element message is Figure 3 or Figure 5 shows.
  • the data transmission processing module 1102 is configured to learn, according to the silence element message received by the receiving module 1101, that the quiet time can use the working frequency band, and the data is not transmitted during the silent time or the available working frequency band indicated by the frequency band field is used to transmit data.
  • the so-called "transmission opportunity” refers to a certain access type (AC) of the STA or AP, which obtains a period of time for transmitting the AC. This duration is called a transmission opportunity (Transmit). Opportunity, TX0P).
  • AC access type
  • TX0P transmission opportunity
  • the data transmission processing module 1102 transmits data using the available working frequency band indicated by the frequency band field at the overlapping time, otherwise, the silent count field, the silence offset field, and the silence duration field carried in the silent element message are jointly indicated. No data is sent during the silent period.
  • the access point ⁇ is used as the DFS0 of the basic service set, and a silence element message is sent by broadcasting a beacon frame, and three silences are arranged.
  • the receiving module 1101 in the basic service set site 1 (STA1) basic service set site 2 (STA2) and the basic service set site 3 (STA3) respectively stores the silence element message required for silence three times after receiving the beacon frame (one The corresponding parameter represented by each field in the silent element message).
  • the data transmission processing module 1102 of Site 1 (STA1) in the basic service set Prior to the first silence, the data transmission processing module 1102 of Site 1 (STA1) in the basic service set obtains TXOP, and the TXOP overlaps partially with the silence duration of the first silence.
  • Basic service The data transmission processing module 1102 of the set station 1 (STA1) obtains an opportunity to transmit data at the overlapping time, and transmits data to the AP using the available working frequency band indicated by the available band (Band) field in the silent element message at the silent time.
  • Site 2 (STA2) in the basic service set obtains a TXOP, and the TXOP partially overlaps with the quiet silence duration of the second silence.
  • the base service set site 2 (STA2) obtains an opportunity to transmit data at an overlapping time at which the data is transmitted to the AP using the available working frequency band indicated by the available band (Band) field in the silence element message.
  • the base service set station learns the silence time according to the obtained transmission opportunity and the silence element message, and may use the working frequency band, and after the data is sent by using the available working frequency band at the overlapping time, if the silent time is When finished, the data transmission processing module 1102 transmits data using the full band.
  • the data transmission processing module 1102 of the site 3 (STA3) in the basic service set obtains a TXOP, and the TXOP includes a silence duration of the third silence.
  • the data transmission processing module 1102 of the base station 2 (STA2) in the basic service set transmits data to the AP using the available working frequency band indicated by the available band (Band) field in the silence element message at the silent time.
  • Embodiments of the present invention also provide a data transmission system in silent mode, as shown in FIG.
  • the exemplary system of FIG. 12 includes the basic service set site 1202 illustrated in FIG. 11 and the basic service set central site 1201 and illustrated in FIG. 9 or FIG. 10, wherein:
  • the basic service set central site 1201 is configured to send a silent element message to the basic service set site 1202, where the silent element message includes at least one frequency band field, and the content of the working frequency band field is used to indicate the basic service of the silent time
  • the working frequency band is available to the in-set site 1202;
  • the basic service set site 1202 is configured to receive a silent element message sent by the basic service set central site 1201, obtain a working frequency band according to the silent element message, and do not send data or use the silent time
  • the available operating band indicated by the band field transmits data.
  • the silence element message includes at least one frequency band field, the content of the frequency band field being used to indicate a silence time of a site available working band or an unavailable working band within the basic service set.
  • the site within the basic service set receives a silence element message, the silence element message including at least one band field, the content of the band field being used to indicate a quiet working time of a site available working band within the basic service set;
  • the station learns the quiet time available working frequency band according to the silence element message, does not transmit data at the silent time, or transmits data using the available working frequency band indicated by the frequency band field.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read Only Memory
  • RAM Random Access Memory
  • magnetic disk or an optical disk and the like.
  • the silent mode indication method, the data transmission method, the device and the system in the silent mode are introduced in detail.
  • the principles and implementation manners of the present invention are described in the following examples. The description is only for helping to understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scopes. The contents of this specification are not to be construed as limiting the invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne, dans un de ses modes de réalisation, un procédé d'indication de mode silencieux, un procédé d'émission de données, un dispositif et système en mode silencieux, destinés à tirer pleinement parti des ressources en bandes de fréquence et à améliorer le débit d'émission du système. Le procédé comporte les étapes consistant à : envoyer un message d'élément silencieux à une station faisant partie de l'ensemble de service de base, de façon à permettre à la station de l'ensemble de service de base d'obtenir une bande de fréquence de travail disponible pendant la période silencieuse selon le message d'élément silencieux, aucune donnée n'étant émise pendant la période silencieuse et aucune bande de fréquence de travail disponible n'étant utilisée pour émettre des données. Selon la technique antérieure, la station de l'ensemble de service de base se voit interdire l'usage de la bande de fréquence de travail toute entière pendant la période silencieuse. Cependant, le procédé d'indication de mode silencieux selon le mode de réalisation de la présente invention permet à la station de l'ensemble de service de base d'émettre des données sur la bande de fréquence de travail disponible pendant la période silencieuse, tirant ainsi pleinement parti des ressources en bandes de fréquence et améliorant le débit d'émission du système tout entier.
PCT/CN2012/077477 2011-09-16 2012-06-25 Procédé d'indication de mode silencieux, procédé d'émission de données et dispositif en mode silencieux Ceased WO2013037228A1 (fr)

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CN109618415B (zh) * 2014-01-16 2021-02-05 电信科学技术研究院有限公司 一种d2d通信方法及设备
CN109729567B (zh) * 2017-10-27 2020-10-27 华为技术有限公司 一种消息处理方法和接入点设备以及消息处理设备
CN114830706B (zh) * 2020-11-27 2025-09-19 北京小米移动软件有限公司 通信方法和通信设备
CN114679795B (zh) * 2020-12-24 2025-03-25 华为技术有限公司 无线局域网中的通信方法、装置及系统
CN113395117B (zh) * 2021-06-15 2022-09-09 江苏科技大学 一种基于索引调制的多载波水声抗干扰通信方法
CN115696278A (zh) * 2021-07-21 2023-02-03 华为技术有限公司 处理广播信息的方法和装置

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