CN106912108A - Update or change the method and device of NAV - Google Patents

Update or change the method and device of NAV Download PDF

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Publication number
CN106912108A
CN106912108A CN201510971059.XA CN201510971059A CN106912108A CN 106912108 A CN106912108 A CN 106912108A CN 201510971059 A CN201510971059 A CN 201510971059A CN 106912108 A CN106912108 A CN 106912108A
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China
Prior art keywords
link
node
nav
ppdu
receiving terminal
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CN201510971059.XA
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CN106912108B (en
Inventor
杨懋
李波
马驰翔
罗俊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201510971059.XA priority Critical patent/CN106912108B/en
Priority to PCT/CN2016/107210 priority patent/WO2017107736A1/en
Publication of CN106912108A publication Critical patent/CN106912108A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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]

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

Abstract

The invention discloses a kind of method and device for updating or changing NAV, it is related to message area, the transmission opportunity of SR data can be improved.Methods described includes：The node of the first link first listens to the physical layer convergence process protocol Data Unit PPDU that the node in Overlapping Basic Service Set OBSS sends, wherein, the node in OBSS includes：The receiving terminal node of the sender node of the second link and the second link, the first link is space reuse link, and the second link is the link for being communicated, then according to PPDU, and/or PPDU receiving power, update or modification network allocation vector NAV.The present invention updates or modification NAV suitable for the sender node of SR links and the receiving terminal node of SR links.

Description

Update or change the method and device of NAV
Technical field
The present invention relates to areas of information technology, more particularly to a kind of method and device for updating or changing NAV.
Background technology
With the development of information technology, WLAN (English full name：Wireless Local Area Networks, English abbreviation：WLAN) also develop therewith, the existing wlan system based on 802.11ac is adjusted using OFDM Mode processed, in medium access control (English full name：Media Access Control, english abbreviation：MAC) Layer does not consider to be based on space reuse (English full name：Spatial Reuse, english abbreviation：SR data) are passed It is defeated, therefore when number of users is than comparatively dense, in order to send data between user, the collision rate of competition will be big It is big to improve, it is therefore desirable to consider the data transfer of SR, and update network allocation vector (English full name： Network Allocation Vector, english abbreviation：NAV), it is to improve data transmission efficiency and lifting System performance.
At present, a kind of method for updating or updating NAV, when node receives this Basic Service Set, (English is complete Claim：Basic Service Set, english abbreviation：What the node in BSS) sent allows to send (English full name： Clear to Send, english abbreviation：CTS) the corresponding receiving power of message is less than preset threshold value, and receives (English full name is sent from the request that the node in non-BSS sends：Request to Send, english abbreviation： RTS) the corresponding receiving power of message is less than above-mentioned preset threshold value, then the node in this BSS updates NAV again.
However, when NAV is updated by the above method, when node receives the receiving power of above two message Respectively less than preset threshold value when, transmitting terminal and receiving terminal are updated and update NAV again, due in intensive field Wireless Fidelity (the English full name of scape：Wireless Fidelity, english abbreviation：WiFi) in system, above-mentioned two The probability that the receiving power of kind message is respectively less than preset threshold value is less than the probability that can carry out SR data transfers, because This, when meeting by above-mentioned condition, updates NAV, so as to cause the chance of SR data transfers relatively low.
The content of the invention
The present invention provides a kind of method and device for updating or changing NAV, can improve the transmission of SR data Chance.
In a first aspect, the embodiment of the invention provides a kind of method for updating or changing NAV, methods described Including：
The node of the first link monitors the physical layer convergence mistake that the node in Overlapping Basic Service Set OBSS sends Journey protocol Data Unit PPDU, the node in the OBSS includes：The sender node of the second link and The receiving terminal node of two links, first link is space reuse link, and second link is to enter The link of row communication；
The node of first link according to the PPDU, and/or the PPDU receiving power, update or Person's modification network allocation vector NAV.
With reference in a first aspect, in the first possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
If the sender node of first link listens to the first of the sender node transmission of the second link PPDU, the then NAV that the sender node holding of first link has been set does not update, a PPDU Including：Request sends RTS frames and data Data frames.
With reference to the first possible implementation of first aspect, in second possible realization of first aspect In mode,
The step of sender node of first link keeps the NAV for having set not update, also includes afterwards：
If the receiving terminal node that the sender node of first link listens to second link send the Two PPDU, then the sender node of the first link according to receive the corresponding receiving power of the 2nd PPDU with Magnitude relationship between preset threshold value, and during the 2nd PPDU carries duration Duration field Value and current NAV values between magnitude relationship, it is determined whether update NAV, the 2nd PPDU includes： Allow to send CTS frames/enhanced and allow to send ECTS frames, receive and confirm ACK frames or uplink data frames, institute Duration fields are stated for indicating the length of transmission opportunity duration TxOP.
With reference to second possible implementation of first aspect, in the third possible realization of first aspect In mode,
The sender node of first link according to receive the corresponding receiving power of the 2nd PPDU with it is pre- Put the magnitude relationship between threshold value, and during the 2nd PPDU carries duration Duration field Magnitude relationship between value and current NAV values, it is determined whether the step of updating NAV, specifically includes：
If the corresponding receiving powers of the 2nd PPDU of the reception are more than the preset threshold value, and described second PPDU carries value the working as more than the sender node of first link in duration Duration field Preceding NAV values, then the sender node of first link update during the NAV is the Duration fields Value.
With reference in a first aspect, in the 4th kind of possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
The sender node of first link sends according to the sender node of second link for listening to A PPDU, and in a PPDU carry duration Duration field in value with it is current Magnitude relationship between NAV values, it is determined whether update the NAV, the Duration fields are used to indicate to pass The length of defeated chance duration TxOP.
With reference to the 4th kind of possible implementation of first aspect, in the 5th kind of possible realization side of first aspect In formula,
The sender node of first link sends according to the sender node of second link for listening to A PPDU, and in a PPDU carry duration Duration field in value with it is current Magnitude relationship between NAV values, it is determined whether the step of updating the NAV, specifically includes：
If the sender node of first link is sent out according to the sender node of second link for listening to Sender node of the value more than first link in the PPDU for sending, and the Duration fields Current NAV values, then it is the Duration fields that the sender node of first link updates the NAV In value.
With reference to the 5th kind of possible implementation of first aspect, in the 6th kind of possible realization side of first aspect In formula,
If the sender node of first link is according to the transmission end segment of second link for listening to The PPDU that point sends, and transmitting terminal of the value more than first link in the Duration fields The current NAV values of node, then it is the Duration that the sender node of first link updates the NAV The step of value in field, also include afterwards：
If the receiving terminal node that the sender node of first link listens to second link send the Two PPDU, then the sender node of first link is according to the corresponding reception work(of reception the 2nd PPDU Magnitude relationship between rate and preset threshold value, it is determined whether the NAV after modification renewal.
With reference to the 5th kind of possible implementation of first aspect, in the 7th kind of possible implementation of first aspect In,
The sender node of first link according to receive the corresponding receiving power of the 2nd PPDU with it is pre- Put the magnitude relationship between threshold value, it is determined whether the step of changing the NAV after updating, specifically include：
If the corresponding receiving powers of the 2nd PPDU that receive are less than the preset threshold value, described first The sender node of link changes the NAV after the renewal.
With reference in a first aspect, in the 8th kind of possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
The sender node of first link sends according to the sender node of second link for listening to A PPDU, it is very first time length to update the NAV, and the very first time length is the 2nd PPDU Transmission time and the short interFrameGap SIFS sums of the two, the SIFS is the transmission of first link End node listens to a PPDU and listens to the 2nd PPDU time intervals therebetween.
With reference to the 8th kind of possible implementation of first aspect, in the 9th kind of possible realization side of first aspect In formula,
The sender node of first link sends according to the sender node of second link for listening to A PPDU, the step of to update the NAV be very first time length, also include afterwards：
If the first link sender node listen to second link receiving terminal node send second PPDU, then the sender node of first link is according to the corresponding receiving powers of reception the 2nd PPDU Magnitude relationship between preset threshold value, it is determined whether change the NAV after having updated.
With reference to the 9th kind of possible implementation of first aspect, in the tenth kind of possible realization of first aspect In mode,
The sender node of first link according to receive the corresponding receiving power of the 2nd PPDU with it is pre- Put the magnitude relationship between threshold value, it is determined whether the step of changing the NAV after having updated, specifically include：
If the corresponding receiving powers of the 2nd PPDU that receive are less than the preset threshold value, described first NAV after having been updated described in the sender node modification of link.
With reference in a first aspect, in a kind of the tenth possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
If what the sender node that the sender node of first link does not hear second link sent First PPDU, listens only to the 2nd PPDU that the receiving terminal node of second link sends, then and described the The sender node of one link is according to receiving the corresponding receiving powers of the 2nd PPDU and preset threshold value Value and first chain in the duration Duration field that magnitude relationship and the 2nd PPDU are carried Magnitude relationship between the current NAV values of the node on road, it is determined whether update the NAV.
With reference to a kind of the tenth possible implementation of first aspect, the 12nd kind in first aspect may realize In mode,
The sender node of first link according to receive the corresponding receiving powers of the 2nd PPDU with Value in the duration Duration field that the magnitude relationship of preset threshold value and the 2nd PPDU are carried with Magnitude relationship between the current NAV values of the sender node of first link, it is determined whether update described The step of NAV, specifically include：
If the corresponding receiving powers of the 2nd PPDU that receive are more than the preset threshold value, and described the Value in the duration Duration field that two PPDU are carried is current more than the node of first link NAV values, then the sender node of first link update the NAV.
With reference in a first aspect, in the 13rd kind of possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
If what the receiving terminal node that the sender node of first link listens to second link sent touches Hair frame, then the sender node of first link according to receive the corresponding receiving power of the trigger frame with it is pre- Put the magnitude relationship of threshold value, it is determined whether update NAV.
With reference to the 13rd kind of possible implementation of first aspect, the 14th kind in first aspect is possible In implementation,
The sender node of first link is according to the corresponding receiving power of the reception trigger frame and preset threshold The magnitude relationship of value, it is determined whether the step of updating NAV, specifically includes：
If the corresponding receiving power of the trigger frame that receives is more than the preset threshold value, first chain The sender node on road updates the NAV；
If the corresponding receiving power of the trigger frame that receives is not more than the preset threshold value, described first The sender node of link keeps the NAV for having set not update.
With reference to the 14th kind of possible implementation of first aspect, the 15th kind in first aspect is possible In implementation,
The sender node of first link is according to the corresponding receiving power of the reception trigger frame and preset threshold The magnitude relationship of value, it is determined whether the step of updating NAV, also includes afterwards：
The sender node of first link listens to the first of the sender node transmission of second link PPDU, the then NAV after the sender node holding of first link has updated is not changed.
With reference in a first aspect, in the 16th kind of possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
If what the receiving terminal node that the receiving terminal node of first link listens only to second link sent 2nd PPDU, then according to receiving, the 2nd PPDU is corresponding to be connect the receiving terminal node of first link Receive the duration Duration field that power is carried with the magnitude relationship and the 2nd PPDU of preset threshold value In value and first link receiving terminal node current NAV values between magnitude relationship, it is determined whether The NAV is updated, the 2nd PPDU includes：Clear to send CTS frames/enhanced allow to send ECTS frames, Receive and confirm ACK frames.
With reference to the 16th kind of possible implementation of first aspect, the 17th kind in first aspect is possible In implementation,
The receiving terminal node of first link according to receive the corresponding receiving powers of the 2nd PPDU with Value in the duration Duration field that the magnitude relationship of preset threshold value and the 2nd PPDU are carried with Magnitude relationship between the current NAV values of the receiving terminal node of first link, it is determined whether update described The step of NAV, specifically include：
If the corresponding receiving powers of the 2nd PPDU that receive are more than the preset threshold value, and described the Value in the duration Duration field that two PPDU are carried is more than the receiving terminal node of first link Current NAV values, then the receiving terminal node renewal NAV of first link.
With reference in a first aspect, in the 18th kind of possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
If the sender node that the receiving terminal node of first link listens to second link send the One PPDU, the then NAV that the receiving terminal node holding of first link has been set does not update, and described first PPDU includes：Request sends RTS frames and data Data frames.
With reference to the 18th kind of possible implementation of first aspect, the 19th kind in first aspect is possible In implementation,
The step of receiving terminal node of first link keeps the NAV for having set not update, also includes afterwards：
If the receiving terminal node of first link listens to the second of the receiving terminal transmission of second link PPDU, then the receiving terminal node of first link is according to the corresponding receiving powers of reception the 2nd PPDU Magnitude relationship between preset threshold value, and the duration Duration field that the 2nd PPDU is carried In value and first link receiving terminal node current NAV values between magnitude relationship, it is determined whether NAV is updated, the 2nd PPDU includes：Allowing to send CTS frames/enhanced allows to send ECTS frames, connects Receive and confirm ACK frames or uplink data frames, the Duration fields are used to indicate transmission opportunity duration TxOP Length.
With reference to the 19th kind of possible implementation of first aspect, the 20th kind in first aspect is possible In implementation,
The receiving terminal node of first link according to receive the corresponding receiving power of the 2nd PPDU with it is pre- Put the magnitude relationship between threshold value, and in the duration Duration fields that carry of the 2nd PPDU Magnitude relationship between the current NAV values of the receiving terminal node of value and first link, it is determined whether update The step of NAV, specifically include：
If the corresponding receiving powers of the 2nd PPDU of the reception are more than the preset threshold value, and described second Value working as more than the receiving terminal node of first link in the duration Duration field that PPDU is carried Preceding NAV values, then the receiving terminal node of first link update during the NAV is the Duration fields Value.
With reference in a first aspect, in a kind of the 20th possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
The receiving terminal node of first link sends according to the sender node of second link for listening to A PPDU, and in a PPDU carry duration Duration field in value with it is described Magnitude relationship between the current NAV values of the receiving terminal node of the first link, it is determined whether update the NAV, The Duration fields are used to indicate the length of transmission opportunity duration TxOP.
With reference to a kind of the 20th possible implementation of first aspect, in the 22nd kind of possibility of first aspect Implementation in,
The receiving terminal node of first link sends according to the sender node of second link for listening to A PPDU, and in a PPDU carry duration Duration field in value with it is described Magnitude relationship between the current NAV values of the receiving terminal node of the first link, it is determined whether update the NAV The step of, specifically include：
If the receiving terminal node of first link is sent out according to the sender node of second link for listening to Receiving terminal node of the value more than first link in the PPDU for sending, and the Duration fields Current NAV values, then it is the Duration fields that the receiving terminal node of first link updates the NAV In value.
With reference to a kind of the 20th possible implementation of first aspect, in the 23rd kind of possibility of first aspect Implementation in,
The receiving terminal node of first link sends according to the sender node of second link for listening to A PPDU, and in a PPDU carry duration Duration field in value with it is described Magnitude relationship between the current NAV values of the receiving terminal node of the first link, it is determined whether update the NAV The step of, also include afterwards：
If the receiving terminal node that the receiving terminal node of first link listens to second link send the Two PPDU, then the receiving terminal node of first link is according to the corresponding reception work(of reception the 2nd PPDU Magnitude relationship between rate and preset threshold value, it is determined whether change the NAV after having updated.
It is possible in the 24th kind of first aspect with reference to the 23rd kind of possible implementation of first aspect In implementation,
The receiving terminal node of first link according to receive the corresponding receiving power of the 2nd PPDU with it is pre- Put the magnitude relationship between threshold value, it is determined whether the step of changing the NAV after having updated, specifically include：
If the corresponding receiving powers of the 2nd PPDU that receive are less than the preset threshold value, described first NAV after having been updated described in the receiving terminal node modification of link.
With reference in a first aspect, in the 25th kind of possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
The receiving terminal node of first link sends according to the sender node of second link for listening to A PPDU, it is very first time length to update the NAV, and the very first time length is the 2nd PPDU Transmission time and the short interFrameGap SIFS sums of the two, the SIFS is the reception of first link End node listens to a PPDU and listens to the 2nd PPDU time intervals therebetween.
It is possible in the 26th kind of first aspect with reference to the 25th kind of possible implementation of first aspect In implementation,
The receiving terminal node of first link sends according to the sender node of second link for listening to A PPDU, after updating the step of the NAV is very first time length, also include：
If the receiving terminal node that the receiving terminal node of first link listens to second link send the Two PPDU, then the receiving terminal node of first link is according to the corresponding reception work(of reception the 2nd PPDU Magnitude relationship between rate and preset threshold value, it is determined whether change the NAV after having updated.
It is possible in the 27th kind of first aspect with reference to the 26th kind of possible implementation of first aspect In implementation,
The receiving terminal node of first link according to receive the corresponding receiving power of the 2nd PPDU with it is pre- Put the magnitude relationship between threshold value, it is determined whether the step of changing the NAV after having updated, specifically include：
If the corresponding receiving powers of the 2nd PPDU that receive are less than the preset threshold value, described first NAV after having been updated described in the receiving terminal node modification of link.
With reference in a first aspect, in the 28th kind of possible implementation of first aspect,
The node of first link according to the PPDU, and/or the PPDU receiving power, update or The step of person modification network allocation vector NAV, specifically include：
If what the receiving terminal node that the receiving terminal node of first link listens to second link sent touches Hair frame, then the receiving terminal node of first link according to receive the corresponding receiving power of the trigger frame with it is pre- Put the magnitude relationship of threshold value, it is determined whether update NAV.
In with reference to the 28th kind of possible implementation of first aspect, in the 29th kind of possibility of first aspect Implementation in,
The receiving terminal node of first link is according to the corresponding receiving power of the reception trigger frame and preset threshold The magnitude relationship of value, it is determined whether the step of updating NAV, specifically includes：
If the corresponding receiving power of the trigger frame that receives is more than the preset threshold value, first chain The receiving terminal node on road updates the NAV；
If the corresponding receiving power of the trigger frame that receives is not more than the preset threshold value, described first The receiving terminal node of link keeps the NAV for having set not update.
With reference to the 29th kind of possible implementation of first aspect, in the 30th kind of possible reality of first aspect In existing mode,
The receiving terminal node of first link is according to the corresponding receiving power of the reception trigger frame and preset threshold The magnitude relationship of value, it is determined whether the step of updating NAV, also includes afterwards：
The receiving terminal node of first link listens to the first of the sender node transmission of second link PPDU, the then NAV after the receiving terminal node holding of first link has updated is not changed.
With reference to first aspect, the first possible implementation is to the 30th kind of possible implementation of first aspect Any one possible implementation, in a kind of the 30th possible implementation of first aspect,
The preset threshold value is -82dBm, clean channel estimating CCA threshold values, the detection of Overlapping Basic Service Set bag Any one in thresholding OBSS packet detection level and signal sensitivity.
With reference to the 16th kind of possible implementation of first aspect to the 30th kind of possible realization side of first aspect Formula, in a kind of the 30th possible implementation of first aspect,
Methods described also includes：
If the receiving terminal node of first link changes the NAV, when the receiving terminal of first link Node receives the data frame that the sender node of the first link sends, the receiving terminal node of first link ACK frames are sent to the sender node of first link；
If the receiving terminal node of first link does not change the NAV, when the reception end segment of the first link During the data frame that the sender node that point receives the first link sends, the receiving terminal node of first link The ACK frames are not sent to the sender node of first link.
Second aspect, the embodiment of the invention provides a kind of device for updating or changing NAV, described device Including：
Monitoring unit, in the node of the first link, for monitoring the section in Overlapping Basic Service Set OBSS The physical layer convergence process protocol Data Unit PPDU that point sends, the node in the OBSS includes：Second The receiving terminal node of the sender node of link and the second link, first link is space reuse link, Second link is the link for being communicated；
Update or modification unit, in the node of first link, for according to the PPDU, and / or the PPDU receiving power, update or modification network allocation vector NAV.
With reference to second aspect, in the first possible implementation of second aspect,
The renewal or modification unit are specifically included：First updates or modified module；
Described first updates or modified module, in the sender node of first link, for working as During the PPDU that the sender node that the sender node of first link listens to the second link sends, The NAV that holding has been set does not update, and a PPDU includes：Request sends RTS frames and data Data Frame.
With reference to the first possible implementation of second aspect, in second possible realization of second aspect In mode,
The renewal or modification unit are specifically included：First determining module：
First determining module, positioned at the sender node of the first link, for when first link During two PPDU that the receiving terminal node that sender node listens to second link sends, according to reception institute State the magnitude relationship between the corresponding receiving powers of the 2nd PPDU and preset threshold value, and the 2nd PPDU Carry the magnitude relationship between the value in duration Duration field and current NAV values, it is determined whether more New NAV, the 2nd PPDU include：Allowing to send CTS frames/enhanced allows to send ECTS frames, receives Confirm ACK frames or uplink data frames, the Duration fields are used to indicate transmission opportunity duration TxOP's Length.
With reference to second possible implementation of second aspect, in the third possible realization of second aspect In mode,
First determining module, in the sender node of first link, specifically for when described The corresponding receiving powers of the 2nd PPDU are received to be carried more than the preset threshold value, and the 2nd PPDU During the current NAV values of the sender node that the value in duration Duration field is more than first link, It is the value in the Duration fields to update the NAV.
With reference to second aspect, in the 4th kind of possible implementation of second aspect,
First determining module, in the sender node of first link, is additionally operable to what basis was listened to The PPDU that the sender node of second link sends, and holding of being carried in a PPDU The magnitude relationship between value and current NAV values in continuous time Duration field, it is determined whether update described NAV, the Duration fields are used to indicate the length of transmission opportunity duration TxOP.
With reference to the 4th kind of possible implementation of second aspect, in the 5th kind of possible realization side of second aspect In formula,
First determining module, in the sender node of first link, specifically for when described The sender node of the first link sent according to the sender node of second link for listening to first Value in PPDU, and the Duration fields is current more than the sender node of first link During NAV values, it is the value in the Duration fields to update the NAV.
With reference to the 5th kind of possible implementation of second aspect, in the 6th kind of possible realization side of second aspect In formula,
First determining module, in the sender node of first link, is additionally operable to when described the During two PPDU that the receiving terminal node that the sender node of one link listens to second link sends, root According to the magnitude relationship received between the corresponding receiving powers of the 2nd PPDU and preset threshold value, it is determined whether repair Change the NAV after updating.
With reference to the 5th kind of possible implementation of second aspect, in the 7th kind of possible implementation of second aspect In,
First determining module, in the sender node of first link, specifically for when described When receiving the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, after changing the renewal NAV。
With reference to second aspect, in the 8th kind of possible implementation of second aspect,
Described first updates or modified module, specific to use in the sender node of first link In the PPDU that the sender node according to second link for listening to sends, updating the NAV is Very first time length, the very first time length is the transmission time and the short interFrameGap of the 2nd PPDU SIFS sums of the two, the SIFS be first link sender node listen to a PPDU with Listen to the 2nd PPDU time intervals therebetween.
With reference to the 8th kind of possible implementation of second aspect, in the 9th kind of possible realization side of second aspect In formula,
First determining module, in the sender node of first link, is additionally operable to work as institute first During two PPDU that the receiving terminal node that the sender node of link listens to second link sends, according to Receive the magnitude relationship between the corresponding receiving powers of the 2nd PPDU and preset threshold value, it is determined whether modification NAV after having updated.
With reference to the 9th kind of possible implementation of second aspect, in the tenth kind of possible realization of second aspect In mode,
First determining module, in the sender node of first link, specifically for when described When receiving the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, after having been updated described in modification NAV。
With reference to second aspect, in a kind of the tenth possible implementation of second aspect,
First determining module, in the sender node of first link, is additionally operable to when the first link Sender node does not hear the PPDU that the sender node of second link sends, and listens only to institute It is corresponding according to the 2nd PPDU is received when stating two PPDU of receiving terminal node transmission of the second link Receiving power and preset threshold value magnitude relationship and the duration Duration that carry of the 2nd PPDU Magnitude relationship between the current NAV values of the node of value and first link in field, it is determined whether more The new NAV.
With reference to a kind of the tenth possible implementation of second aspect, the 12nd kind in second aspect may realize In mode,
First determining module, in the sender node of first link, specifically for when described The corresponding receiving powers of the 2nd PPDU are received to be taken more than the preset threshold value, and the 2nd PPDU During the current NAV values of the node that the value in the duration Duration field of band is more than first link, more The new NAV.
With reference to second aspect, in the 13rd kind of possible implementation of second aspect,
First determining module, positioned at the sender node of first link, for when first chain During the trigger frame that the receiving terminal node that the sender node on road listens to second link sends, according to reception The magnitude relationship of the corresponding receiving power of the trigger frame and preset threshold value, it is determined whether update NAV.
With reference to the 13rd kind of possible implementation of second aspect, the 14th kind in second aspect is possible In implementation,
First determining module, in the sender node of first link, specifically for when described When receiving the corresponding receiving power of the trigger frame more than the preset threshold value, the NAV is updated；
First determining module, in the sender node of first link, specifically for when described When receiving the corresponding receiving power of the trigger frame and being not more than the preset threshold value, the NAV that holding has been set is not Update.
With reference to the 14th kind of possible implementation of second aspect, the 15th kind in second aspect is possible In implementation,
First updates or modified module, in the sender node of first link, for when described During the PPDU that the sender node that the sender node of the first link listens to second link sends, NAV after holding has updated is not changed.
With reference to second aspect, in the 16th kind of possible implementation of second aspect,
The renewal or modification unit are specifically included：Second determining module；
Second determining module, in the receiving terminal node of first link, is additionally operable to when described the During two PPDU that the receiving terminal node that the receiving terminal node of one link listens only to second link sends, According to the magnitude relationship for receiving the corresponding receiving powers of the 2nd PPDU and preset threshold value and described the Value and the receiving terminal node of first link in the duration Duration field that two PPDU are carried are worked as Magnitude relationship between preceding NAV values, it is determined whether update the NAV, the 2nd PPDU includes：Remove Send CTS frames/enhanced and allow to send ECTS frames, receive and confirm ACK frames.
With reference to the 16th kind of possible implementation of second aspect, the 17th kind in second aspect is possible In implementation,
Second determining module, in the receiving terminal node of first link, specifically for when described The corresponding receiving powers of the 2nd PPDU are received to be taken more than the preset threshold value, and the 2nd PPDU Current NAV of the value more than the receiving terminal node of first link in the duration Duration field of band During value, the NAV is updated.
With reference to second aspect, in the 18th kind of possible implementation of second aspect,
Second renewal or modification unit are specifically included：Second updates or modified module；
Described second updates or modified module, in the receiving terminal node of first link, for working as The receiving terminal node of first link listens to the first of the sender node transmission of second link During PPDU, the NAV that holding has been set does not update, and a PPDU includes：Request send RTS frames with And data Data frames.
With reference to the 18th kind of possible implementation of second aspect, the 19th kind in second aspect is possible In implementation,
Second determining module, in the receiving terminal node of first link, for when described first During two PPDU that the receiving terminal that the receiving terminal node of link listens to second link sends, according to reception Magnitude relationship between the corresponding receiving power of 2nd PPDU and preset threshold value, and described second Value in the duration Duration field that PPDU is carried is current with the receiving terminal node of first link Magnitude relationship between NAV values, it is determined whether update NAV, the 2nd PPDU includes：Allow to send CTS Frame/enhanced allows to send ECTS frames, receive and confirm ACK frames or uplink data frames, the Duration words Section is used to indicate the length of transmission opportunity duration TxOP.
With reference to the 19th kind of possible implementation of second aspect, the 20th kind in second aspect is possible In implementation,
Second determining module, in the receiving terminal node of first link, specifically for when described The corresponding receiving powers of the 2nd PPDU are received more than the preset threshold value, and the 2nd PPDU is carried During the current NAV values of the receiving terminal node that the value in duration Duration field is more than first link, It is the value in the Duration fields to update the NAV.
With reference to second aspect, in a kind of the 20th possible implementation of second aspect,
Second determining module, in the receiving terminal node of first link, for according to the institute for listening to State the second link sender node send a PPDU, and in a PPDU carry continue It is big between the current NAV values of the receiving terminal node of value and first link in time Duration field Small relation, it is determined whether update the NAV, the Duration fields are used to indicate transmission opportunity duration TxOP Length.
With reference to a kind of the 20th possible implementation of second aspect, in the 22nd kind of possibility of second aspect Implementation in,
Second determining module, positioned at the receiving terminal node of first link, specifically for when described The receiving terminal node of one link sent according to the sender node of second link for listening to first Value in PPDU, and the Duration fields is current more than the receiving terminal node of first link During NAV values, it is the value in the Duration fields to update the NAV.
With reference to a kind of the 20th possible implementation of second aspect, in the 23rd kind of possibility of second aspect Implementation in,
Second determining module, in the receiving terminal node of first link, is additionally operable to when described the During two PPDU that the receiving terminal node that the receiving terminal node of one link listens to second link sends, root According to the magnitude relationship received between the corresponding receiving powers of the 2nd PPDU and preset threshold value, it is determined whether repair Change the NAV after having updated.
It is possible in the 24th kind of second aspect with reference to the 23rd kind of possible implementation of second aspect In implementation,
Second determining module, in the receiving terminal node of first link, specifically for when described When receiving the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, after having been updated described in modification NAV。
With reference to second aspect, in the 25th kind of possible implementation of second aspect,
Second updates or modified module, in the receiving terminal node of first link, for according to prison The PPDU that the sender node of second link heard sends, it is the very first time to update the NAV Length, the very first time length be the 2nd PPDU transmission time and both short interFrameGap SIFS it A PPDU is listened to the receiving terminal node that, the SIFS is first link and listen to described 2nd PPDU time intervals therebetween.
It is possible in the 26th kind of second aspect with reference to the 25th kind of possible implementation of second aspect In implementation,
Second determining module, in the receiving terminal node of first link, is additionally operable to when described the During two PPDU that the receiving terminal node that the receiving terminal node of one link listens to second link sends, root According to the magnitude relationship received between the corresponding receiving powers of the 2nd PPDU and preset threshold value, it is determined whether repair Change the NAV after having updated.
It is possible in the 27th kind of second aspect with reference to the 26th kind of possible implementation of second aspect In implementation,
Second determining module, in the receiving terminal node of first link, specifically for when described When receiving the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, after having been updated described in modification NAV。
With reference to second aspect, in the 28th kind of possible implementation of second aspect,
Second determining module, in the receiving terminal node of first link, is additionally operable to when first chain During the trigger frame that the receiving terminal node that the receiving terminal node on road listens to second link sends, according to reception The magnitude relationship of the corresponding receiving power of the trigger frame and preset threshold value, it is determined whether update NAV.
In with reference to the 28th kind of possible implementation of second aspect, in the 29th kind of possibility of second aspect Implementation in,
Second determining module, in the receiving terminal node of first link, specifically for when described When receiving the corresponding receiving power of the trigger frame more than the preset threshold value, then the NAV is updated；
Second determining module, in the receiving terminal node of first link, specifically for when described When receiving the corresponding receiving power of the trigger frame and being not more than the preset threshold value, the NAV that holding has been set is not Update.
With reference to the 29th kind of possible implementation of second aspect, in the 30th kind of possible reality of second aspect In existing mode,
Described second updates or modified module, in the receiving terminal node of first link, is additionally operable to The PPDU that the sender node of second link sends is listened to, then the receiving terminal of first link Node keeps the NAV after having updated not change.
With reference to second aspect, the first possible implementation is to the 30th kind of possible implementation of second aspect Any one possible implementation, in a kind of the 30th possible implementation of second aspect,
The preset threshold value is -82dBm, clean channel estimating CCA threshold values, the detection of Overlapping Basic Service Set bag Any one in thresholding OBSS packet detection level and signal sensitivity.
With reference to the 16th kind of possible implementation of second aspect to the 30th kind of possible realization side of second aspect Formula, in a kind of the 30th possible implementation of second aspect,
Described device also includes：Transmitting element；
The transmitting element, in the receiving terminal node of first link, for when first link Receiving terminal node when changing the NAV, and when the receiving terminal node of first link receives the first chain During the data frame that the sender node on road sends, ACK frames are sent to the sender node of first link；
The transmitting element, in the receiving terminal node of first link, is additionally operable to when first chain When the receiving terminal node on road does not change the NAV, and when the receiving terminal node of the first link receives the first chain During the data frame that the sender node on road sends, do not send described to the sender node of first link ACK frames.
The third aspect, the embodiment of the invention provides a kind of device for updating or changing NAV, including：
Processor, in the node of the first link, for monitoring the node in Overlapping Basic Service Set OBSS The physical layer convergence process protocol Data Unit PPDU of transmission, the node in the OBSS includes：Second chain The receiving terminal node of the sender node on road and the second link, first link is space reuse link, institute It is the link for being communicated to state the second link；
The processor, in the node of first link, for according to the PPDU and/or described The receiving power of PPDU, updates or modification network allocation vector NAV.
With reference to the third aspect, in the first possible implementation of the third aspect,
The processor, in the sender node of first link, specifically for when first chain During the PPDU that the sender node that the sender node on road listens to the second link sends, holding has been set NAV do not update, a PPDU includes：Request sends RTS frames and data Data frames.
With reference to the first possible implementation of the third aspect, in second possible realization of the third aspect In mode,
The processor, positioned at the sender node of the first link, specifically for when the hair of first link During two PPDU that the receiving terminal node that sending end node listens to second link sends, according to receiving Magnitude relationship between the corresponding receiving powers of 2nd PPDU and preset threshold value, and the 2nd PPDU takes With the magnitude relationship between the value in duration Duration field and current NAV values, it is determined whether update NAV, the 2nd PPDU includes：Allowing to send CTS frames/enhanced allows to send ECTS frames, receives true Recognize ACK frames or uplink data frames, the Duration fields are used to indicate the length of transmission opportunity duration TxOP Degree.
With reference to second possible implementation of the third aspect, in the third possible realization of the third aspect In mode,
The processor, in the sender node of first link, specifically for receiving the when described When the corresponding receiving powers of two PPDU carry lasting more than the preset threshold value, and the 2nd PPDU Between value in Duration fields more than the sender node of first link current NAV values when, renewal institute It is the value in the Duration fields to state NAV.
With reference to the third aspect, in the 4th kind of possible implementation of the third aspect,
The processor, in the sender node of first link, is additionally operable to according to the institute for listening to State the second link sender node send a PPDU, and in a PPDU carry continue The magnitude relationship between value and current NAV values in time Duration field, it is determined whether update described NAV, the Duration fields are used to indicate the length of transmission opportunity duration TxOP.
With reference to the 4th kind of possible implementation of the third aspect, in the 5th kind of possible realization side of the third aspect In formula,
The processor, in the sender node of first link, specifically for when first chain The PPDU that the sender node on road sends according to the sender node of second link for listening to, and And the value in the Duration fields more than first link sender node current NAV values when, more The new NAV is the value in the Duration fields.
With reference to the 5th kind of possible implementation of the third aspect, in the 6th kind of possible realization side of the third aspect In formula,
The processor, in the sender node of first link, is additionally operable to when first link Sender node listen to second link receiving terminal node send two PPDU when, according to reception Magnitude relationship between the corresponding receiving power of 2nd PPDU and preset threshold value, it is determined whether modification updates NAV afterwards.
With reference to the 5th kind of possible implementation of the third aspect, in the 7th kind of possible implementation of the third aspect In,
The processor, in the sender node of first link, specifically for when the reception institute When stating the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, the NAV after the renewal is changed.
With reference to the third aspect, in the 8th kind of possible implementation of the third aspect,
The processor, in the sender node of first link, listens to specifically for basis The PPDU that the sender node of second link sends, it is very first time length to update the NAV, The very first time length is the transmission time and the short interFrameGap SIFS sums of the two of the 2nd PPDU, institute The sender node that SIFS is first link is stated to listen to a PPDU and listen to described second PPDU time intervals therebetween.
With reference to the 8th kind of possible implementation of the third aspect, in the 9th kind of possible realization side of the third aspect In formula,
The processor, in the sender node of first link, be additionally operable to when the first link During two PPDU that the receiving terminal node that sender node listens to second link sends, according to reception institute State the magnitude relationship between the corresponding receiving powers of the 2nd PPDU and preset threshold value, it is determined whether modification has updated NAV afterwards.
With reference to the 9th kind of possible implementation of the third aspect, in the tenth kind of possible realization of the third aspect In mode,
The processor, in the sender node of first link, specifically for when the reception institute When stating the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, the NAV after having been updated described in modification.
With reference to the third aspect, in a kind of the tenth possible implementation of the third aspect,
The processor, in the sender node of first link, is additionally operable to the hair when the first link Sending end node does not hear the PPDU that the sender node of second link sends, and listens only to described During two PPDU that the receiving terminal node of the second link sends, according to receiving, the 2nd PPDU is corresponding The duration Duration word that receiving power is carried with the magnitude relationship and the 2nd PPDU of preset threshold value Magnitude relationship between the current NAV values of the node of value and first link in section, it is determined whether update The NAV.
With reference to a kind of the tenth possible implementation of the third aspect, the 12nd kind in the third aspect may realize In mode,
The processor, in the sender node of first link, specifically for being received when described The corresponding receiving power of 2nd PPDU is more than the preset threshold value, and holding of carrying of the 2nd PPDU During the current NAV values of the node that the value in continuous time Duration field is more than first link, update described NAV。
With reference to the third aspect, in the 13rd kind of possible implementation of the third aspect,
The processor, positioned at the sender node of first link, for when the hair of first link It is described tactile according to receiving during the trigger frame that the receiving terminal node that sending end node listens to second link sends The magnitude relationship of the corresponding receiving power of hair frame and preset threshold value, it is determined whether update NAV.
With reference to the 13rd kind of possible implementation of the third aspect, the 14th kind in the third aspect is possible In implementation,
The processor, in the sender node of first link, specifically for when the reception institute When stating the corresponding receiving power of trigger frame more than the preset threshold value, the NAV is updated；
The processor, in the sender node of first link, specifically for when the reception institute When stating the corresponding receiving power of trigger frame and being not more than the preset threshold value, the NAV that holding has been set does not update.
With reference to the 14th kind of possible implementation of the third aspect, the 15th kind in the third aspect is possible In implementation,
The processor, in the sender node of first link, is additionally operable to when first link Sender node when listening to the PPDU that the sender node of second link sends, keep more NAV after new is not changed.
With reference to the third aspect, in the 16th kind of possible implementation of the third aspect,
The processor, in the receiving terminal node of first link, is additionally operable to when first link Receiving terminal node when listening only to two PPDU that the receiving terminal node of second link sends, according to connecing Receive the magnitude relationship and the 2nd PPDU of the corresponding receiving powers of the 2nd PPDU and preset threshold value The current NAV of value in the duration Duration field of carrying and the receiving terminal node of first link Magnitude relationship between value, it is determined whether update the NAV, the 2nd PPDU includes：Clear to send CTS Frame/enhanced allows to send ECTS frames, receive and confirm ACK frames.
With reference to the 16th kind of possible implementation of the third aspect, the 17th kind in the third aspect is possible In implementation,
The processor, in the receiving terminal node of first link, specifically for being received when described The corresponding receiving power of 2nd PPDU is more than the preset threshold value, and holding of carrying of the 2nd PPDU During the current NAV values of the receiving terminal node that the value in continuous time Duration field is more than first link, more The new NAV.
With reference to the third aspect, in the 18th kind of possible implementation of the third aspect,
The processor, in the receiving terminal node of first link, is additionally operable to when first link Receiving terminal node listen to second link sender node send a PPDU when, holding set The NAV for putting does not update, and a PPDU includes：Request sends RTS frames and data Data frames.
With reference to the 18th kind of possible implementation of the third aspect, the 19th kind in the third aspect is possible In implementation,
The processor, in the receiving terminal node of first link, is additionally operable to when first link Receiving terminal node listen to second link receiving terminal send two PPDU when, according to receive described in Magnitude relationship between the corresponding receiving powers of 2nd PPDU and preset threshold value, and the 2nd PPDU takes The current NAV values of value in the duration Duration field of band and the receiving terminal node of first link Between magnitude relationship, it is determined whether update NAV, the 2nd PPDU includes：Allow to send CTS frames/ It is enhanced to allow to send ECTS frames, receive confirmation ACK frames or uplink data frames, the Duration fields Length for indicating transmission opportunity duration TxOP.
With reference to the 19th kind of possible implementation of the third aspect, the 20th kind in the third aspect is possible In implementation,
The processor, in the receiving terminal node of first link, specifically for receiving the when described The corresponding receiving powers of two PPDU be more than the preset threshold value, and the 2nd PPDU carry it is lasting when Between value in Duration fields more than the receiving terminal node of first link current NAV values when, renewal institute It is the value in the Duration fields to state NAV.
With reference to the third aspect, in a kind of the 20th possible implementation of the third aspect,
The processor, in the receiving terminal node of first link, is additionally operable to according to the institute for listening to State the second link sender node send a PPDU, and in a PPDU carry continue It is big between the current NAV values of the receiving terminal node of value and first link in time Duration field Small relation, it is determined whether update the NAV, the Duration fields are used to indicate transmission opportunity duration TxOP Length.
With reference to a kind of the 20th possible implementation of the third aspect, in the 22nd kind of possibility of the third aspect Implementation in,
The processor, positioned at the receiving terminal node of first link, specifically for when first link The PPDU that is sent according to the sender node of second link for listening to of receiving terminal node, and During the current NAV values of the receiving terminal node that the value in the Duration fields is more than first link, update The NAV is the value in the Duration fields.
With reference to a kind of the 20th possible implementation of the third aspect, in the 23rd kind of possibility of the third aspect Implementation in,
The processor, in the receiving terminal node of first link, is additionally operable to when first link Receiving terminal node listen to second link receiving terminal node send two PPDU when, according to reception Magnitude relationship between the corresponding receiving power of 2nd PPDU and preset threshold value, it is determined whether modification is more NAV after new.
It is possible in the 24th kind of the third aspect with reference to the 23rd kind of possible implementation of the third aspect In implementation,
The processor, in the receiving terminal node of first link, specifically for when the reception institute When stating the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, the NAV after having been updated described in modification.
With reference to the third aspect, in the 25th kind of possible implementation of the third aspect,
The processor, in the receiving terminal node of first link, is additionally operable to according to the institute for listening to The PPDU that the sender node of the second link sends is stated, it is very first time length, institute to update the NAV Transmission time and the short interFrameGap SIFS sums of the two that very first time length is the 2nd PPDU are stated, it is described SIFS is that the receiving terminal node of first link listens to a PPDU and listens to described second PPDU time intervals therebetween.
It is possible in the 26th kind of the third aspect with reference to the 25th kind of possible implementation of the third aspect In implementation,
The processor, in the receiving terminal node of first link, is additionally operable to when first link Receiving terminal node listen to second link receiving terminal node send two PPDU when, according to reception Magnitude relationship between the corresponding receiving power of 2nd PPDU and preset threshold value, it is determined whether modification is more NAV after new.
It is possible in the 27th kind of the third aspect with reference to the 26th kind of possible implementation of the third aspect In implementation,
The processor, in the receiving terminal node of first link, specifically for when the reception institute When stating the corresponding receiving powers of the 2nd PPDU less than the preset threshold value, the NAV after having been updated described in modification.
With reference to the third aspect, in the 28th kind of possible implementation of the third aspect,
The processor, in the receiving terminal node of first link, is additionally operable to when first link Receiving terminal node listen to second link receiving terminal node send trigger frame when, according to receive institute State the magnitude relationship of the corresponding receiving power of trigger frame and preset threshold value, it is determined whether update NAV.
In with reference to the 28th kind of possible implementation of the third aspect, in the 29th kind of possibility of the third aspect Implementation in,
The processor, in the receiving terminal node of first link, specifically for when the reception institute When stating the corresponding receiving power of trigger frame more than the preset threshold value, then the NAV is updated；
The processor, in the receiving terminal node of first link, specifically for when the reception institute When stating the corresponding receiving power of trigger frame and being not more than the preset threshold value, the NAV that holding has been set does not update.
With reference to the 29th kind of possible implementation of the third aspect, in the 30th kind of possible reality of the third aspect In existing mode,
The processor, in the receiving terminal node of first link, is additionally operable to listen to described second The PPDU that the sender node of link sends, the then receiving terminal node holding of first link has updated NAV afterwards is not changed.
With reference to the third aspect, the first possible implementation is to the 30th kind of possible implementation of the third aspect Any one possible implementation, in a kind of the 30th possible implementation of the third aspect,
The preset threshold value is -82dBm, clean channel estimating CCA threshold values, the detection of Overlapping Basic Service Set bag Any one in thresholding OBSS packet detection level and signal sensitivity.
With reference to the 16th kind of possible implementation of the third aspect to the 30th kind of possible realization side of the third aspect Formula, in a kind of the 30th possible implementation of the third aspect,
Described device also includes：Transceiver；
The transceiver, in the receiving terminal node of first link, for when first link When receiving terminal node changes the NAV, and when the receiving terminal node of first link receives the first link Sender node send data frame when, to first link sender node send ACK frames；
The transceiver, in the receiving terminal node of first link, is additionally operable to when first link Receiving terminal node when not changing the NAV, and when the receiving terminal node of the first link receives the first link Sender node send data frame when, do not send the ACK to the sender node of first link Frame.
Renewal or the method and device of modification NAV that the present invention is provided, the node of the first link are first listened to The physical layer convergence process protocol Data Unit PPDU that node in Overlapping Basic Service Set OBSS sends, its In, the node in OBSS includes：The receiving terminal node of the sender node of the second link and the second link, the One link is space reuse link, and the second link is the link for being communicated, then according to PPDU, and / or PPDU receiving power, update or modification network allocation vector NAV.With at present by prior art Method updates NAV and compares, and the node of space reuse link of the present invention is communicated according to whether receiving Link sender node send PPDU and the link for communicating receiving terminal node send PPDU, and can be according to the sender node for receiving the link for communicating or the link for communicating The corresponding receiving powers of PPDU that send of receiving terminal node, update or modification NAV, rather than working as space When the sender node for reusing link is respectively less than preset threshold value, NAV can be just updated or change, so that can To reduce the node updates of space reuse link or the probability of modification NAV, and then space reuse can be improved The chance of data transfer.
Brief description of the drawings
In order to illustrate more clearly of technical scheme of the invention or of the prior art, below will be to the present invention or existing The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, it is attached in describing below Figure is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying creation Property work on the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the method flow diagram of renewal or modification NAV in the embodiment of the present invention；
Fig. 2 is another method flow diagram for updating or changing NAV in the embodiment of the present invention；
Fig. 3 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Fig. 4 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Fig. 5 is a kind of schematic diagram for updating or changing NAV of the embodiment of the present invention；
Fig. 6 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Fig. 7 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Fig. 8 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Fig. 9 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 10 is another schematic diagram for updating or changing NAV in the embodiment of the present invention；
Figure 11 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 12 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 13 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 14 is the schematic diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 15 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 16 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 17 is the schematic diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 18 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 19 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 20 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 21 is the schematic diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 22 is the method flow diagram of another renewal or modification NAV in the embodiment of the present invention；
Figure 23 is a kind of renewal of the embodiment of the present invention or the schematic device of modification NAV；
Figure 24 is another schematic device for updating or changing NAV of the embodiment of the present invention；
Figure 25 is another structural representation for updating or changing NAV of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the invention, rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation Property work under the premise of all other embodiment for being obtained, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of method for updating or changing NAV, it is possible to increase SR data transfers Chance, as shown in figure 1, methods described includes：
101st, the node of the first link monitors the physical layer remittance that the node in Overlapping Basic Service Set OBSS sends Collecting process protocol Data Unit PPDU.
Wherein, Overlapping Basic Service Set (English full name：Overlap Basic Service Set, english abbreviation： OBSS the node in) includes：The receiving terminal node of the sender node of the second link and the second link, first Link is space reuse link, and the second link is the link for being communicated.
Wherein, the node of the second link includes：The sender node and ongoing chains of existing ongoing links The receiving terminal node on road, ongoing links are the link for being communicated.
For the embodiment of the present invention, ongoing links in the presence of, other links are to carry out Information transfer.Under space reuse technology, the second link under certain conditions, can carry out parallel transmission, This second link is exactly SR links.
For the embodiment of the present invention, when channel idle, competition first, to the link of channel, is ongoing Link.
For the embodiment of the present invention, sender node and receiving terminal node and the ongoing links of SR links Sender node and receiving terminal node, concentrate positioned at the different basic services of there is overlap two.
102nd, the node of the first link is according to PPDU, and/or PPDU receiving power, update or modification net Network allocation vector NAV.
For the embodiment of the present invention, NAV is used in virtual carrier monitoring, and it functions as a counter, Wherein, NAV be used for virtual reflection channel it is busy with it is not busy, wherein, it is busy that NAV is non-zero, and 0 is not busy.At this In inventive embodiments, modification NAV is that the NAV is reset into 0, wherein, it is what the NAV was set to update NAV Parallel transmission is not allowed in time, NAV is reset to 0, characterizing the link can be with parallel transmission.
For the embodiment of the present invention, SR link transmitting terminals node is according to whether ongoing in listening to OBSS The PPDU that the node of link transmitting terminal node and/or ongoing link receiving terminals sends, and ought receive The PPDU that the node of ongoing link transmitting terminals node and/or ongoing link receiving terminals sends in OBSS, can With the receiving power according to the PPDU for receiving the transmission of ongoing link transmitting terminals node and/or reception ongoing The corresponding receiving powers of PPDU that link receiving terminal node sends, it is determined whether update or modification NAV.
For the embodiment of the present invention, modification NAV is the NAV to be reset into 0 or NAV is revised as into renewal Preceding value.Wherein, the value before the renewal be the first link node receive the second link node send PPDU before, the corresponding values of NAV of the node of the first link.
Renewal provided in an embodiment of the present invention or the method for modification NAV, the transmitting terminal of spatial reuse SR links Node first listens to the physical layer convergence process protocol data that the node in Overlapping Basic Service Set OBSS sends Unit PPDU, the node in OBSS includes：The sender node and ongoing chains of existing ongoing links The receiving terminal node on road, then according to the sender node and ongoing links of the ongoing links for listening to Receiving terminal node send PPDU, and/or PPDU receiving power, update or modification network allocation arrow Amount NAV.Compared with NAV is updated by the method for prior art at present, the hair of embodiment of the present invention SR links Sending end node is according to whether PPDU the and ongoing links for receiving the transmission of ongoing link transmitting terminals are received The PPDU for sending is held, and can be received according to ongoing link transmitting terminals or ongoing links is received Hold send the corresponding receiving powers of PPDU, update or modification NAV, rather than when SR link transmitting terminals it is equal During less than preset threshold value, can just update or change NAV, such that it is able to SR link transmitting terminals update or The probability of NAV is changed, and then the chance of SR data transfers can be improved.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 1, step 102, The node of the first link according to PPDU, and/or PPDU receiving power, update or modification network allocation arrow Amount NAV, specifically includes step 201 as shown in Figure 2.
If the 201, the node of the first link listens to the PPDU that the sender node of the second link sends, Then the sender node of the first link keeps the NAV for having set not update.
Wherein, a PPDU includes：Request sends RTS frames and data Data frames.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 2, step 201, If the node of the first link listens to the PPDU that the sender node of the second link sends, the first link Sender node the step of keep the NAV that has set not update, step as shown in Figure 3 is also included afterwards 301。
If the 301, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, Then the node of the first link is according to the size received between the corresponding receiving powers of the 2nd PPDU and preset threshold value Relation, and the 2nd PPDU is carried between the value in duration Duration field and current NAV values Magnitude relationship, it is determined whether update NAV.
Wherein, the 2nd PPDU includes：Allow to send CTS frames, receive and confirm ACK frames or uplink data frames, Duration fields are used to indicate transmission opportunity duration (English full name：Transmission opportunity, English Abbreviation：TxOP length), wherein, the length of TXOP characterizes the transmission time of second link, herein In transmission period, other links are not available for information transfer.
Wherein, preset threshold value is -82dBm, clean channel estimating (English full name：Clear Channel Assessment, english abbreviation：CCA) threshold value, Overlapping Basic Service Set bag detection threshold OBSS packet Any one in detection level and signal sensitivity.
For the embodiment of the present invention, when the sender node of the first link first listens to the transmission to the second link During the PPDU that end node sends, the sender node of the first link keeps updated NAV, then when When listening to two PPDU that the receiving terminal node of the second link sends, the sender node of the first link according to Receive the corresponding receiving powers of the 2nd PPDU, it is determined whether update NAV.
For example, a PPDU can be RTS, the 2nd PPDU can confirm that character (English full name： Acknowledgement, english abbreviation：ACK), when the sender node of the first link receives the second chain During the RTS that road transmitting terminal sends, do not update and do not change NAV, when the sender node of the first link is received During the CTS that the second link receiving terminal node sends, determine whether to update according to the corresponding receiving powers of CTS are received Or modification NAV.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 3, step 301, If the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, the first link Node according to the magnitude relationship received between the corresponding receiving powers of the 2nd PPDU and preset threshold value, Yi Ji Two PPDU carry the magnitude relationship between the value in duration Duration field and current NAV values, really It is fixed whether to update NAV, can specifically include step 401 as shown in Figure 4.
If the 401, the node of the first link listens to second of the second link receiving terminal transmission in OBSS PPDU, then when the corresponding receiving powers of the 2nd PPDU of reception are more than preset threshold value, and the 2nd PPDU is carried Have value in duration Duration field more than the sender node of the first link current NAV values when, the The node updates NAV of one link is the value in Duration fields.
For the embodiment of the present invention, if the second link receiving terminal sends during the node of the first link listens to OBSS The 2nd PPDU, then be more than preset threshold value, and second when receiving the corresponding receiving powers of the 2nd PPDU The value that PPDU is carried in duration Duration field is not more than the current NAV values of the node of the first link When, the node of the first link does not update NAV.
For the embodiment of the present invention, if the node of the first link listens to the second of the second link receiving terminal transmission PPDU, then be not more than preset threshold value when receiving the corresponding receiving powers of the 2nd PPDU, then the section of the first link Point does not update NAV.
For the embodiment of the present invention, when the sender node that the node of the first link listens to the second link sends A PPDU when, the node of the first link does not update NAV, if listening to the receiving terminal node of the second link Send the 2nd PPDU, then the node of the first link according to receive the 2nd PPDU receiving power, it is determined that Whether NAV is updated, as shown in Figure 5.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 1, step 102, The node of the first link according to PPDU, and/or PPDU receiving power, update or modification network allocation arrow Amount NAV, specifically includes step 601 as shown in Figure 6.
601st, the node of the first link sent according to the sender node of the second link for listening to first Between value and current NAV values in the duration Duration field carried in PPDU, and a PPDU Magnitude relationship, it is determined whether update NAV.
Wherein, Duration fields are used to indicate the length of transmission opportunity duration TxOP.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 6, step 601, A PPDU, Yi Ji that the node of the first link sends according to the sender node of the second link for listening to The magnitude relationship between value and current NAV values in the duration Duration field carried in one PPDU, Determine whether to update NAV, specifically include step 701 as shown in Figure 7.
If the 701st, the node of the first link sent according to the sender node of the second link for listening to first Value in PPDU, and Duration fields is more than the current NAV values of the node of the first link, then the first chain The node updates NAV on road is the value in Duration fields.
For the embodiment of the present invention, if the node of the first link is according to the transmission end segment of the second link for listening to The PPDU that point sends, and value in Duration fields is not more than the current of the node of the first link NAV values, then the node of the first link do not update the NAV values.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 7, step 701, If the PPDU that the node of the first link sends according to the sender node of the second link for listening to, and Value in Duration fields is more than the current NAV values of the node of the first link, then the node updates of the first link NAV is the value in Duration fields, and step 801 as shown in Figure 8 is also included afterwards.
If the 801, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, Then the node of the first link is according to the size received between the corresponding receiving powers of the 2nd PPDU and preset threshold value Relation, it is determined whether change the NAV after having updated.
For the embodiment of the present invention, the NAV after modification has updated is that NAV is reset into 0 or NAV is changed It is the value before renewal.Wherein, the value before the renewal is that the node of the first link receives the second link Before the PPDU that sender node sends, the corresponding values of NAV of the node of the first link.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 8, step 801, If the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, the first link Node according to the magnitude relationship received between the corresponding receiving powers of the 2nd PPDU and preset threshold value, it is determined that being The no NAV changed after having updated, can specifically include step 901 as shown in Figure 9.
If the 901, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, Then when the corresponding receiving powers of the 2nd PPDU are received less than preset threshold value, the node of the first link has been changed more NAV after new.
For the embodiment of the present invention, if the receiving terminal node that the node of the first link listens to the second link sends The 2nd PPDU, then when the node of the first link receives the corresponding receiving powers of the 2nd PPDU not less than pre- When putting threshold value, the node of the first link keeps the NAV after having updated, and does not modify.Wherein, the first chain NAV after the node modification on road has updated is after NAV after having updated resets to 0 or updated this NAV be revised as update before value.Wherein, the value before the renewal is that the node of the first link is received Before the PPDU that the sender node of the second link sends, the NAV of the node of the first link is corresponding Value.
For example, the node of the first link receive the second link sender node send a PPDU it Before, the corresponding values of NAV of the first link are 2, and the value of NAV is 5 after renewal, then as the 2nd PPDU of reception When corresponding receiving power is less than preset threshold value, the NAV is reset to 0 or should by the node of the first link NAV is revised as receiving the value before a PPDU of the sender node transmission of the second link, as 2.
For example, the RTS frames that the node of the first link sends according to the sender node of the second link, then basis The magnitude relationship between value and current NAV values in the duration Duration field carried in RTS frames, really Whether fixed to update NAV, then the node of the first link sends according to the receiving terminal node for receiving the second link Magnitude relationship between the corresponding receiving power of CTS frames and preset threshold value, it is determined whether change the NAV.
For the embodiment of the present invention, when the sender node that the node of the first link listens to the second link sends A PPDU when, value in the Duration fields that the node of the first link is carried according to a PPDU with work as Magnitude relationship between preceding NAV values determines whether to update NAV, if listening to the receiving terminal node of the second link Send the 2nd PPDU, then the node of the first link according to receive the 2nd PPDU receiving power, it is determined that Whether NAV is changed, as shown in Figure 10.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 1, step 102, The node of the first link according to PPDU, and/or PPDU receiving power, update or modification network allocation arrow Amount NAV, specifically includes step 1101 as shown in figure 11.
1101st, the node of the first link sent according to the sender node of the second link for listening to first PPDU, renewal NAV are very first time length.
Wherein, very first time length is the transmission time and short interFrameGap SIFS sums of the two of the 2nd PPDU, SIFS be the first link node listen to a PPDU and listen to the 2nd PPDU times therebetween between Every.
Wherein, a PPDU includes：Request sends RTS frames and data Data frames.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in figure 11, step 1101st, the PPDU that the node of the first link sends according to the sender node of the second link for listening to, Renewal NAV is very first time length, and step 1201 as shown in figure 12 is also included afterwards.
If the 1201, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, Then the node of the first link is according to the size received between the corresponding receiving powers of the 2nd PPDU and preset threshold value Relation, it is determined whether change the NAV after having updated.
Wherein, the 2nd PPDU includes：Allow to send CTS frames, receive and confirm ACK frames or uplink data frames.
For the embodiment of the present invention, the NAV after modification has updated is that the NAV is reset into 0 or by the NAV Value before being revised as updating.Wherein, the value before the renewal is that the node of the first link receives the second chain Before the PPDU that the sender node on road sends, the corresponding values of NAV of the node of the first link.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in figure 12, step If the 1201, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, the The node of one link according to the magnitude relationship received between the corresponding receiving powers of the 2nd PPDU and preset threshold value, Determine whether to change the NAV after having updated, specifically include step 1301 as shown in figure 13.
If the 1301, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link sends, Then when the corresponding receiving powers of the 2nd PPDU are received less than preset threshold value, the node of the first link has been changed more NAV after new.
For the embodiment of the present invention, if the receiving terminal node that the node of the first link listens to the second link sends The 2nd PPDU, then when receiving the corresponding receiving powers of the 2nd PPDU and being not less than preset threshold value, the first chain The node on road does not change the NAV after having updated.
For the embodiment of the present invention, when the sender node that the node of the first link listens to the second link sends A PPDU when, the node updates NAV of the first link is between the transmission time and short interframe of the 2nd PPDU Every SIFS sums of the two, if the 2nd PPDU that the receiving terminal node for listening to the second link sends, the first chain The node on road is according to the receiving power for receiving the 2nd PPDU, it is determined whether modification NAV, as shown in figure 14.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 1, step 102, The node of the first link according to PPDU, and/or PPDU receiving power, update or modification network allocation arrow Amount NAV, specifically includes step 1501 as shown in figure 15.
If the 1501, the node of the first link does not hear the first of the sender node transmission of the second link PPDU, listens only to the 2nd PPDU sent to the receiving terminal node of the second link, then the node of the first link Taken with the magnitude relationship and the 2nd PPDU of preset threshold value according to the corresponding receiving powers of the 2nd PPDU are received Size between the current NAV values of the node of value and the first link in the duration Duration field of band Relation, it is determined whether update NAV.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in figure 15, step If the 1501, the node of the first link does not hear the PPDU that the sender node of the second link sends, only The 2nd PPDU that the receiving terminal node of the second link sends is listened to, then the node of the first link is according to receiving Magnitude relationship between the corresponding receiving powers of 2nd PPDU and preset threshold value, it is determined whether update NAV, tool Body includes step 1601 as shown in figure 16.
If the 1601, receiving the corresponding receiving powers of the 2nd PPDU to be taken more than preset threshold value, and the 2nd PPDU Value in the duration Duration field of band is more than the current NAV values of the node of the first link, then the first chain The node updates NAV on road.
For the embodiment of the present invention, if receiving the corresponding receiving powers of the 2nd PPDU no more than preset threshold value, Or the 2nd PPDU carry duration Duration field in value be not more than the first link node work as Preceding NAV values, the then NAV that the node holding of the first link has been set, do not update NAV.
For the embodiment of the present invention, when the node of the first link only receives the receiving terminal node hair of the second link The 2nd PPDU for sending, and do not hear the PPDU that the sender node of the second link sends, then first The duration that the node of link is carried according only to the receiving power for receiving the 2nd PPDU and the 2nd PPDU The magnitude relationship of the current NAV values of the node of value and the first link in Duration fields, it is determined whether update NAV, as shown in figure 17.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 1, step 102, The node of the first link according to PPDU, and/or PPDU receiving power, update or modification network allocation arrow Amount NAV, specifically includes step 1801 as shown in figure 18.
If the 1801, the sender node of the first link listens to the triggering that the receiving terminal node of the second link sends Frame, then the sender node of the first link is big with preset threshold value according to the corresponding receiving power of trigger frame is received Small relation, it is determined whether update NAV.
For the embodiment of the present invention, trigger frame is that the receiving terminal node of the second link sends, the first link Node can listen to the second link receiving terminal node send trigger frame, then the node of the first link according to Receive the receiving power and preset threshold value magnitude relationship of the trigger frame, it is determined whether update NAV.
Wherein, preset threshold value is -82dBm, clean channel estimating CCA threshold values, the inspection of Overlapping Basic Service Set bag Survey any one in thresholding OBSS packet detection level and signal sensitivity.
The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in figure 18, step If the 1801, the node of the first link listens to the trigger frame that the receiving terminal node of the second link sends, first The node of link is according to the magnitude relationship for receiving the corresponding receiving power of trigger frame and preset threshold value, it is determined whether NAV is updated, step 1901-1902 as shown in figure 19 is specifically included.
If the 1901, the node of the first link listens to the trigger frame that the receiving terminal node of the second link sends, When the corresponding receiving power of trigger frame is received more than preset threshold value, the node updates NAV of the first link.
Be -80dBm when the corresponding receiving power of trigger frame is received for example, preset threshold value is -82dBm, then the The node updates NAV of one link.
If the 1902, the node of the first link listens to the trigger frame that the receiving terminal node of the second link sends, When the corresponding receiving power of reception trigger frame is not more than preset threshold value, the node of the first link keeps having set NAV do not update.
Be -85dBm when the corresponding receiving power of trigger frame is received for example, preset threshold value is -82dBm, then the The node of one link keeps the NAV for having set not update.
Alternatively possible implementation shown in the embodiment of the present invention, on the basis of as shown in figure 19, step If rapid 1801, the node of the first link listens to the trigger frame that the receiving terminal node of the second link sends, the The node of one link according to the magnitude relationship for receiving the corresponding receiving power of trigger frame and preset threshold value, it is determined that being No renewal NAV, also includes step 2001 as shown in figure 20 afterwards.
If the 2001, the node of the first link listens to the PPDU that the sender node of the second link sends, Then the node of the first link keeps the NAV after having updated not change.
For the embodiment of the present invention, when the receiving terminal node that the node of the first link receives the second link sends Trigger frame when, the node of the first link determines whether to update NAV according to the receiving power for receiving the trigger frame, And protected as the PPDU that the sender node that the node of the first link receives the second link sends afterwards Hold updated NAV not change, as shown in figure 21.
The alternatively possible implementation of the embodiment of the present invention, methods described also includes step as shown in figure 42 Rapid 2201-2202.
The 2201st, if the node of the first link is the receiving terminal node of the first link, and the first link reception End node changes NAV, then when the receiving terminal node of the first link receives the sender node hair of the first link During the data frame for sending, the receiving terminal node of the first link sends ACK frames to the sender node of the first link.
For the embodiment of the present invention, when NAV is reset to the 0, and first chain by the receiving terminal node of the first link When the sender node that the receiving terminal node on road receives the first link sends data frame, the reception of the first link End node sends ACK frames to the sender node of the first link.
The 2202nd, if the node of the first link is the receiving terminal node of the first link, and the first link reception End node does not change NAV, then when the receiving terminal node of the first link receives the sender node of the first link During the data frame of transmission, the receiving terminal node of the first link does not send ACK to the sender node of the first link Frame.
For the embodiment of the present invention, the receiving terminal node of the first link does not change NAV to be included：First link Receiving terminal node updates NAV and the receiving terminal node of the first link keeps the NAV for having set.
For the embodiment of the present invention, when the receiving terminal node of the first link is only to update NAV, not by the NAV The receiving terminal node for resetting to the 0, and first link receives the data that the sender node of the first link sends During frame, the receiving terminal node of the first link does not send ACK frames to the sender node of first link.
Further, as the realization to method shown in Fig. 1 and Figure 22, the embodiment of the present invention additionally provides one kind Renewal or the device of modification NAV, the transmission opportunity for improving SR data, as shown in figure 23, device bag Include：Monitoring unit 2301, renewal or modification unit 2302.
Monitoring unit 2301, in the node of the first link, for monitoring Overlapping Basic Service Set OBSS in Node send physical layer convergence process protocol Data Unit PPDU.
Wherein, the node in OBSS includes：The reception end segment of the sender node of the second link and the second link Point, the first link is space reuse link, and the second link is the link for being communicated.
Update or modification unit 2302, in the node of the first link, for according to PPDU, and/or The receiving power of PPDU, updates or modification network allocation vector NAV.
Further, as shown in figure 24, update or change unit 2302 and specifically include：First update or Modified module 23021；
First updates or modified module 23021, in the node of the first link, for when the first link During the PPDU that the sender node that node listens to the second link sends, the NAV that has set of holding is not more Newly.
Wherein, a PPDU includes：Request sends RTS frames and data Data frames.
Update or modification unit 2302 is specifically included：First determining module 23022.
First determining module 23022, positioned at the node of the first link, for when the sender node of the first link The PPDU that the sender node of the second link sends is not heard, the receiving terminal to the second link is listened only to During two PPDU that node sends, according to receiving the corresponding receiving powers of the 2nd PPDU and preset threshold value The node of value and the first link in the duration Duration field that magnitude relationship and the 2nd PPDU are carried Current NAV values between magnitude relationship, it is determined whether update NAV.
Wherein, the 2nd PPDU includes：Allowing to send CTS frames/enhanced allows to send ECTS frames, receives true Recognize ACK frames or uplink data frames, Duration fields are used to indicate the length of transmission opportunity duration TxOP.
Wherein, preset threshold value is -82dBm, clean channel estimating CCA threshold values, the inspection of Overlapping Basic Service Set bag Survey any one in thresholding OBSS packet detection level and signal sensitivity.
First determining module 23022, in the node of the first link, specifically for as the 2nd PPDU of reception During corresponding receiving power is more than preset threshold value, and the 2nd PPDU carries duration Duration field Value more than the first link node current NAV values when, update NAV be Duration fields in value.
First determining module 23022, in the node of the first link, is additionally operable to according to the second chain for listening to The PPDU that the sender node on road sends, and the duration Duration carried in a PPDU The magnitude relationship between value and current NAV values in field, it is determined whether update NAV, Duration fields are used In the length for indicating transmission opportunity duration TxOP.
First determining module 23022, in the node of the first link, specifically for when the node of the first link The PPDU that sender node according to the second link for listening to sends, and in Duration fields When value is more than the current NAV values of the node of the first link, it is the value in Duration fields to update NAV.
First determining module 23022, in the node of the first link, is additionally operable to be supervised when the node of the first link When hearing two PPDU that the receiving terminal node of the second link sends, according to receiving, the 2nd PPDU is corresponding to be connect Receive the magnitude relationship between power and preset threshold value, it is determined whether the NAV after modification renewal.
First determining module 23022, in the node of the first link, specifically for as the 2nd PPDU of reception When corresponding receiving power is less than preset threshold value, the NAV after modification renewal.
First updates or modified module, in the node of the first link, is listened to specifically for basis The PPDU that the sender node of the second link sends, renewal NAV are very first time length.
Wherein, very first time length is the transmission time and short interFrameGap SIFS sums of the two of the 2nd PPDU, SIFS be the first link node listen to a PPDU and listen to the 2nd PPDU times therebetween between Every.
First determining module 23022, in the node of the first link, be additionally operable to when the first link node When listening to two PPDU of receiving terminal node transmission of the second link, according to receiving, the 2nd PPDU is corresponding Magnitude relationship between receiving power and preset threshold value, it is determined whether change the NAV after having updated.
First determining module 23022, in the node of the first link, specifically for as the 2nd PPDU of reception When corresponding receiving power is less than preset threshold value, the NAV after having updated is changed.
First determining module 23022, in the node of the first link, be additionally operable to when the first link node not The PPDU that the sender node of the second link sends is listened to, the reception end segment to the second link is listened only to During two PPDU that point sends, according to receiving between the corresponding receiving powers of the 2nd PPDU and preset threshold value Magnitude relationship, it is determined whether update NAV.
First determining module 23022, in the node of the first link, the 2nd PPDU is received specifically for working as When corresponding receiving power is more than preset threshold value, NAV is updated.
First determining module 23022, positioned at the node of the first link, listens to for the node when the first link During the trigger frame that the receiving terminal node of the second link sends, according to receive the corresponding receiving power of trigger frame with it is pre- Put the magnitude relationship of threshold value, it is determined whether update NAV.
First determining module 23022, in the node of the first link, specifically for corresponding when trigger frame is received Receiving power be more than preset threshold value when, update NAV.
First determining module 23022, in the node of the first link, specifically for corresponding when trigger frame is received Receiving power when being not more than preset threshold value, the NAV that holding has been set does not update.
First updates or modified module, in the node of the first link, for when the node of the first link When listening to a PPDU of sender node transmission of the second link, the NAV after holding has updated is not repaiied Change.
The device also includes：Transmitting element 2401.
Transmitting element 2401, in the receiving terminal node of the first link, for when the receiving terminal of the first link During node modification NAV, and when the receiving terminal node of the first link receives the sender node hair of the first link During the data frame for sending, ACK frames are sent to the sender node of the first link.
Transmitting element 2401, in the receiving terminal node of the first link, is additionally operable to the reception when the first link When end node does not change NAV, and when the receiving terminal node of the first link receives the transmission end segment of the first link During the data frame that point sends, ACK frames are not sent to the sender node of the first link.
Renewal provided in an embodiment of the present invention or the device of modification NAV, the node of the first link are first listened to The physical layer convergence process protocol Data Unit PPDU that node in Overlapping Basic Service Set OBSS sends, its In, the node in OBSS includes：The receiving terminal node of the sender node of the second link and the second link, the One link is space reuse link, and the second link is the link for being communicated, then according to PPDU, and / or PPDU receiving power, update or modification network allocation vector NAV.With at present by prior art Method updates NAV and compares, and the node of embodiment of the present invention space reuse link enters according to whether receiving PPDU and the receiving terminal node hair of the link for communicating that the sender node of the link of row communication sends The PPDU for sending, and can communicate according to the sender node for receiving the link for communicating or The corresponding receiving powers of PPDU that the receiving terminal node of link sends, update or modification NAV, rather than working as When the sender node of space reuse link is respectively less than preset threshold value, can just update or change NAV, from And the node updates of space reuse link or the probability of modification NAV can be reduced, and then space can be improved The chance of reusing data transmission.
It should be noted that in the expansion storage array provided in the embodiment of the present invention corresponding to each equipment Other are accordingly described, and may be referred to the correspondence description in Fig. 1-Figure 22, be will not be repeated here.
Yet further, the embodiment of the present invention additionally provides a kind of device for updating or changing NAV, such as schemes Shown in 25, the device includes：Processor 2501, transceiver 2502 and memory 2503, processor 2501 It is connected with memory 2503 and transceiver 2502 by data/address bus.
Processor 2501, in the node of the first link, for monitoring Overlapping Basic Service Set OBSS in The physical layer convergence process protocol Data Unit PPDU that node sends.
Wherein, the node in OBSS includes：The reception end segment of the sender node of the second link and the second link Point, the first link is space reuse link, and the second link is the link for being communicated.
Processor 2501, in the node of the first link, for according to PPDU, and/or PPDU reception Power, updates or modification network allocation vector NAV.
Processor 2501, in the node of the first link, listens to specifically for the node when the first link During the PPDU that the sender node of the second link sends, the NAV that holding has been set does not update.
Wherein, a PPDU includes：Request sends RTS frames and data Data frames.
Processor 2501, positioned at the node of the first link, specifically for listening to the when the node of the first link During two PPDU that the receiving terminal node of two links sends, according to the corresponding receiving powers of the 2nd PPDU of reception Magnitude relationship between preset threshold value, and during the 2nd PPDU carries duration Duration field Magnitude relationship between value and current NAV values, it is determined whether update NAV.
Wherein, the 2nd PPDU includes：Allowing to send CTS frames/enhanced allows to send ECTS frames, receives true Recognize ACK frames or uplink data frames, Duration fields are used to indicate the length of transmission opportunity duration TxOP.
Wherein, the preset threshold value is -82dBm, clean channel estimating CCA threshold values, Overlapping Basic Service Set Any one in bag detection threshold OBSS packet detection level and signal sensitivity.
Processor 2501, in the node of the first link, specifically for the 2nd PPDU is corresponding to be connect when receiving Receive power and be more than preset threshold value, and the value that the 2nd PPDU is carried in duration Duration field is more than During the current NAV values of the node of the first link, it is the value in Duration fields to update NAV.
Processor 2501, in the node of the first link, is additionally operable to the hair according to the second link for listening to In the PPDU that sending end node sends, and the duration Duration field carried in a PPDU Magnitude relationship between value and current NAV values, it is determined whether update NAV, Duration fields are used to indicate to pass The length of defeated chance duration TxOP.
Processor 2501, in the node of the first link, specifically for the node when the first link according to prison The PPDU that the sender node of the second link heard sends, and value in Duration fields is more than During the current NAV values of the node of the first link, it is the value in Duration fields to update NAV.
Processor 2501, in the node of the first link, is additionally operable to the node when the first link and listens to the During two PPDU that the receiving terminal node of two links sends, according to the corresponding receiving powers of the 2nd PPDU of reception Magnitude relationship between preset threshold value, it is determined whether the NAV after modification renewal.
Processor 2501, in the node of the first link, specifically for the 2nd PPDU is corresponding to be connect when receiving When receiving power less than preset threshold value, the NAV after modification renewal.
Processor 2501, in the node of the first link, specifically for according to the second link for listening to The PPDU that sender node sends, renewal NAV are very first time length.
Wherein, very first time length is the transmission time and short interFrameGap SIFS sums of the two of the 2nd PPDU, SIFS be the first link node listen to a PPDU and listen to the 2nd PPDU times therebetween between Every.
Processor 2501, in the node of the first link, be additionally operable to when the node of the first link listen to During two PPDU that the receiving terminal node of the second link sends, according to the corresponding reception work(of the 2nd PPDU of reception Magnitude relationship between rate and preset threshold value, it is determined whether change the NAV after having updated.
Processor 2501, in the node of the first link, specifically for the 2nd PPDU is corresponding to be connect when receiving When receiving power less than preset threshold value, the NAV after having updated is changed.
Processor 2501, in the node of the first link, is additionally operable to not heard when the node of the first link The PPDU that the sender node of the second link sends, the receiving terminal node listened only to the second link sends Two PPDU when, according to the size received between the corresponding receiving powers of the 2nd PPDU and preset threshold value Relation, it is determined whether update NAV.
Processor 2501, in the node of the first link, specifically for corresponding when the 2nd PPDU is received When receiving power is more than preset threshold value, NAV is updated.
Processor 2501, positioned at the node of the first link, the second chain is listened to for the node when the first link During the trigger frame that the receiving terminal node on road sends, according to the corresponding receiving power of reception trigger frame and preset threshold value Magnitude relationship, it is determined whether update NAV.
Processor 2501, in the node of the first link, specifically for when the corresponding reception of reception trigger frame When power is more than preset threshold value, NAV is updated.
Processor 2501, in the node of the first link, specifically for when the corresponding reception of reception trigger frame When power is not more than preset threshold value, the NAV that holding has been set does not update.
Processor 2501, in the node of the first link, is additionally operable to the node when the first link and listens to the During the PPDU that the sender node of two links sends, the NAV after holding has updated is not changed.
Transceiver 2502, in the receiving terminal node of the first link, for when the reception end segment of the first link During point modification NAV, and when the sender node that the receiving terminal node of the first link receives the first link sends Data frame when, to the first link sender node send ACK frames.
Transceiver 2502, in the receiving terminal node of the first link, is additionally operable to the receiving terminal when the first link When node does not change NAV, and when the receiving terminal node of the first link receives the sender node of the first link During the data frame of transmission, ACK frames are not sent to the sender node of the first link.
Renewal provided in an embodiment of the present invention or the device of modification NAV, the node of the first link are first listened to The physical layer convergence process protocol Data Unit PPDU that node in Overlapping Basic Service Set OBSS sends, its In, the node in OBSS includes：The receiving terminal node of the sender node of the second link and the second link, the One link is space reuse link, and the second link is the link for being communicated, then according to PPDU, and / or PPDU receiving power, update or modification network allocation vector NAV.With at present by prior art Method updates NAV and compares, and the node of embodiment of the present invention space reuse link enters according to whether receiving PPDU and the receiving terminal node hair of the link for communicating that the sender node of the link of row communication sends The PPDU for sending, and can communicate according to the sender node for receiving the link for communicating or The corresponding receiving powers of PPDU that the receiving terminal node of link sends, update or modification NAV, rather than working as When the sender node of space reuse link is respectively less than preset threshold value, can just update or change NAV, from And the node updates of space reuse link or the probability of modification NAV can be reduced, and then space can be improved The chance of reusing data transmission.
It should be noted that in the renewal provided in the embodiment of the present invention or modification NAV corresponding to each equipment Other corresponding descriptions, may be referred to the correspondence description in Fig. 1 to Figure 22 any one, will not be repeated here.
The device of renewal provided in an embodiment of the present invention or modification NAV can realize the method reality of above-mentioned offer Example is applied, concrete function is realized referring to the explanation in embodiment of the method, will not be repeated here.The present invention is implemented Renewal or the method and device of modification NAV that example is provided go for the transmitting terminal and the of the first link The receiving terminal of one link updates or modification NAV, but is not limited only to this.
One of ordinary skill in the art will appreciate that all or part of flow in realizing above-described embodiment method, The hardware that computer program be can be by instruct correlation is completed, program can be stored in a computer can Read in storage medium, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Its In, storage medium can be magnetic disc, CD, read-only memory (Read-Only Memory, ROM) Or random access memory (Random Access Memory, RAM) etc..
More than, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, Any one skilled in the art the invention discloses technical scope in, the change that can be readily occurred in Change or replace, should all be included within the scope of the present invention.Therefore, protection scope of the present invention should It is defined by scope of the claims.

Claims (22)

1. it is a kind of update or modification NAV method, it is characterised in that including：
The node of the first link monitors the physical layer convergence mistake that the node in Overlapping Basic Service Set OBSS sends Journey protocol Data Unit PPDU, the node in the OBSS includes：The sender node of the second link and The receiving terminal node of two links, first link is space reuse link, and second link is to enter The link of row communication；
The node of first link according to the PPDU, and/or the PPDU receiving power, update or Person's modification network allocation vector NAV.
2. the method for renewal according to claim 1 or modification NAV, it is characterised in that described the The node of one link according to the PPDU, and/or the PPDU receiving power, update or modification network The step of allocation vector NAV, specifically include：
If the node of first link listens to the PPDU that the sender node of the second link sends, The node of first link keeps the NAV for having set not update, and a PPDU includes：Request sends RTS frames and data Data frames.
3. the method for renewal according to claim 2 or modification NAV, it is characterised in that described the The step of node of one link keeps the NAV for having set not update, also includes afterwards：
If the node of first link listens to the second of the receiving terminal node transmission of second link PPDU, then the node of the first link is according to the corresponding receiving powers of reception the 2nd PPDU and preset threshold value Between magnitude relationship, and the 2nd PPDU carries value in duration Duration field and works as Magnitude relationship between preceding NAV values, it is determined whether update NAV, the 2nd PPDU includes：Allow to send CTS frames/enhanced allow to send ECTS frames, receive and confirm ACK frames or uplink data frames, the Duration Field is used to indicate the length of transmission opportunity duration TxOP.
4. the method for renewal according to claim 3 or modification NAV, it is characterised in that described the The node of one link is according to the size received between the corresponding receiving powers of the 2nd PPDU and preset threshold value Relation, and the 2nd PPDU carry value and current NAV values in duration Duration field it Between magnitude relationship, it is determined whether update NAV the step of, specifically include：
If the corresponding receiving powers of the 2nd PPDU of the reception are more than the preset threshold value, and described second PPDU carries current NAV of the value more than the node of first link in duration Duration field Value, then NAV described in the node updates of first link is the value in the Duration fields.
5. the method for renewal according to claim 1 or modification NAV, it is characterised in that described the The node of one link according to the PPDU, and/or the PPDU receiving power, update or modification network The step of allocation vector NAV, specifically include：
The node of first link sent according to the sender node of second link for listening to first Value and current NAV values in the duration Duration field carried in PPDU, and a PPDU Between magnitude relationship, it is determined whether update the NAV, the Duration fields are used to indicate transmission opportunity The length of duration TxOP.
6. the method for renewal according to claim 5 or modification NAV, it is characterised in that described the The PPDU that the node of one link sends according to the sender node of second link for listening to, and The size between value and current NAV values in the duration Duration field carried in first PPDU Relation, it is determined whether the step of updating the NAV, specifically includes：
If the node of first link sent according to the sender node of second link for listening to Current NAV value of the value more than the node of first link in one PPDU, and the Duration fields, Then NAV described in the node updates of first link is the value in the Duration fields.
7. it is according to claim 6 renewal or modification NAV method, it is characterised in that if described The node of first link sent according to the sender node of second link for listening to first Current NAV value of the value more than the node of first link in PPDU, and the Duration fields, The step of then NAV described in the node updates of first link is the value in the Duration fields, afterwards also Including：
If the node of first link listens to the second of the receiving terminal node transmission of second link PPDU, then the node of first link according to receive the corresponding receiving power of the 2nd PPDU with it is preset Magnitude relationship between threshold value, it is determined whether the NAV after modification renewal.
8. the method for renewal according to claim 7 or modification NAV, it is characterised in that described the The node of one link is according to the size received between the corresponding receiving powers of the 2nd PPDU and preset threshold value Relation, it is determined whether the step of changing the NAV after updating, specifically includes：
If the corresponding receiving power of the 2nd PPDU is less than the preset threshold value, the section of first link NAV after the point modification renewal.
9. the method for renewal according to claim 1 or modification NAV, it is characterised in that described the The node of one link according to the PPDU, and/or the PPDU receiving power, update or modification network The step of allocation vector NAV, specifically include：
If the node of first link listens to the trigger frame that the receiving terminal node of second link sends, Then the node of first link is according to the size for receiving the corresponding receiving power of the trigger frame and preset threshold value Relation, it is determined whether update NAV；
If the corresponding receiving power of the trigger frame that receives is more than the preset threshold value, first chain NAV described in the node updates on road；
If the corresponding receiving power of the trigger frame that receives is not more than the preset threshold value, described first The node of link keeps the NAV for having set not update.
10. renewal according to claim any one of 2-9 or the method for modification NAV, it is characterised in that The preset threshold value is -82dBm, clean channel estimating CCA threshold values, Overlapping Basic Service Set bag detection threshold Any one in OBSS packet detection level and signal sensitivity.
11. renewals according to claim 1 or the method for modification NAV, it is characterised in that the side Method also includes：
If the node of first link is the receiving terminal node of the first link, and first link connects Receiving end node changes the NAV, then when the receiving terminal node of first link receives the hair of the first link The data frame that sending end node sends, transmitting terminal from the receiving terminal node of first link to first link Node sends ACK frames；
If the node of first link is the receiving terminal node of the first link, and first link connects Receiving end node does not change the NAV, then when the receiving terminal node of first link receives the first link During the data frame that sender node sends, the receiving terminal node of first link is not to first link Sender node sends the ACK frames.
A kind of 12. devices for updating or changing NAV, it is characterised in that including：
Monitoring unit, in the node of the first link, for monitoring the section in Overlapping Basic Service Set OBSS The physical layer convergence process protocol Data Unit PPDU that point sends, the node in the OBSS includes：Second The receiving terminal node of the sender node of link and the second link, first link is space reuse link, Second link is the link for being communicated；
Update or modification unit, in the node of first link, for according to the PPDU, and / or the PPDU receiving power, update or modification network allocation vector NAV.
13. renewals according to claim 12 or the device of modification NAV, it is characterised in that described Update or modification unit is specifically included：First updates or modified module；
Described first updates or modified module, in the node of first link, for when described the During the PPDU that the sender node that the node of one link listens to the second link sends, what holding had been set NAV does not update, and a PPDU includes：Request sends RTS frames and data Data frames.
14. renewals according to claim 13 or the device of modification NAV, it is characterised in that described Update or modification unit is specifically included：First determining module：
First determining module, positioned at the node of the first link, supervises for the node when first link When hearing two PPDU that the receiving terminal node of second link sends, according to reception the 2nd PPDU Magnitude relationship between corresponding receiving power and preset threshold value, and the 2nd PPDU is when carrying lasting Between magnitude relationship between value in Duration fields and current NAV values, it is determined whether update NAV, it is described 2nd PPDU includes：Allow to send CTS frames/enhanced allow to send ECTS frames, receive confirm ACK frames or Person's uplink data frames, the Duration fields are used to indicate the length of transmission opportunity duration TxOP.
15. renewals according to claim 14 or the device of modification NAV, it is characterised in that
First determining module, in the node of first link, specifically for receiving the when described When the corresponding receiving powers of two PPDU carry lasting more than the preset threshold value, and the 2nd PPDU Between value in Duration fields more than the node of first link current NAV values when, the renewal NAV It is the value in the Duration fields.
16. renewals according to claim 12 or the device of modification NAV, it is characterised in that
First determining module, in the node of first link, is additionally operable to according to described for listening to The PPDU that the sender node of two links sends, and the duration carried in a PPDU The magnitude relationship between value and current NAV values in Duration fields, it is determined whether update the NAV, institute Duration fields are stated for indicating the length of transmission opportunity duration TxOP.
17. renewals according to claim 16 or the device of modification NAV, it is characterised in that
First determining module, in the node of first link, specifically for when first chain The PPDU that the node on road sends according to the sender node of second link for listening to, and it is described During the current NAV values of the node that the value in Duration fields is more than first link, updating the NAV is Value in the Duration fields.
18. renewals according to claim 17 or the device of modification NAV, it is characterised in that
First determining module, in the node of first link, is additionally operable to when first link Node when listening to two PPDU that the receiving terminal node of second link sends, according to receiving described the Magnitude relationship between the corresponding receiving powers of two PPDU and preset threshold value, it is determined whether after modification updates NAV。
19. renewals according to claim 18 or the device of modification NAV, it is characterised in that
First determining module, in the node of first link, specifically for when described second When the corresponding receiving powers of PPDU are less than the preset threshold value, the NAV after the renewal is changed.
20. renewals according to claim 12 or the device of modification NAV, it is characterised in that
First determining module, positioned at the node of first link, for when the section of first link During the trigger frame that the receiving terminal node that point listens to second link sends, according to the reception trigger frame pair The receiving power and the magnitude relationship of preset threshold value answered, it is determined whether update NAV；
First determining module, in the node of first link, specifically for when the reception institute When stating the corresponding receiving power of trigger frame more than the preset threshold value, the NAV is updated；
First determining module, in the node of first link, specifically for when the reception institute When stating the corresponding receiving power of trigger frame and being not more than the preset threshold value, the NAV that holding has been set does not update.
The device of 21. renewal or modification NAV according to claim any one of 13-20, its feature exists In the preset threshold value is -82dBm, clean channel estimating CCA threshold values, the detection of Overlapping Basic Service Set bag Any one in thresholding OBSS packet detection level and signal sensitivity.
22. renewals according to claim 12 or the device of modification NAV, it is characterised in that described Device also includes：Transmitting element；
The transmitting element, in the receiving terminal node of first link, for when first link Node be the first link receiving terminal node, and the receiving terminal node modification of first link is described During NAV, and when the receiving terminal node of first link receives the sender node transmission of the first link During data frame, ACK frames are sent to the sender node of first link；
The transmitting element, in the receiving terminal node of first link, is additionally operable to when first chain The node on road is the receiving terminal node of the first link, and the receiving terminal node of first link does not change institute When stating NAV, and when the sender node that the receiving terminal node of first link receives the first link sends Data frame when, do not send the ACK frames to the sender node of first link.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112188640A (en) * 2019-07-05 2021-01-05 华为技术有限公司 Communication protection method and device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112512082A (en) * 2020-01-22 2021-03-16 中兴通讯股份有限公司 Transmission method, device, communication node and storage medium of wireless network

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110317630A1 (en) * 2010-06-23 2011-12-29 Chunhui Zhu Method and system for contention avoidance in multi-user multiple-input-multiple-output wireless networks
CN102595623A (en) * 2011-01-13 2012-07-18 中兴通讯股份有限公司 Multi-frame transmission method and multi-frame transmission system
CN104184702A (en) * 2013-05-22 2014-12-03 华为终端有限公司 Data transmission method and device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110317630A1 (en) * 2010-06-23 2011-12-29 Chunhui Zhu Method and system for contention avoidance in multi-user multiple-input-multiple-output wireless networks
CN102595623A (en) * 2011-01-13 2012-07-18 中兴通讯股份有限公司 Multi-frame transmission method and multi-frame transmission system
CN104184702A (en) * 2013-05-22 2014-12-03 华为终端有限公司 Data transmission method and device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112188640A (en) * 2019-07-05 2021-01-05 华为技术有限公司 Communication protection method and device
WO2021004404A1 (en) * 2019-07-05 2021-01-14 华为技术有限公司 Communication protection method and apparatus
US11665264B2 (en) 2019-07-05 2023-05-30 Huawei Technologies Co., Ltd. Communication protection method for sensing commmunication and updating or skipping updating a NAV accordingly, and apparatus therefor

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