CN106912108B

CN106912108B - Update or modify the method and device of NAV

Info

Publication number: CN106912108B
Application number: CN201510971059.XA
Authority: CN
Inventors: 杨懋; 李波; 马驰翔; 罗俊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-12-22
Filing date: 2015-12-22
Publication date: 2019-10-18
Anticipated expiration: 2035-12-22
Also published as: WO2017107736A1; CN106912108A

Abstract

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

Description

Update or modify the method and device of NAV

Technical field

The present invention relates to information technology field, in particular to the method and device of a kind of update or modification NAV.

Background technique

With the development of information technology, WLAN (full name in English: Wireless Local Area Networks, English abbreviation: WLAN) also develop therewith, the existing wlan system based on 802.11ac uses OFDM modulation system, visits in medium Ask that control (full name in English: Media Access Control, english abbreviation: MAC) layer does not consider based on space reuse (English Literary full name: Spatial Reuse, english abbreviation: SR) data transmission, therefore when number of users is than comparatively dense, between user In order to send data, the collision rate of competition will be greatly improved, it is therefore desirable to be considered the data transmission of SR, and be updated network distribution Vector (full name in English: Network Allocation Vector, english abbreviation: NAV), with improve data transfer efficiency and Lifting system performance.

Currently, the method for a kind of update or update NAV, when node receives this basic service set (full name in English: Basic Service Set, english abbreviation: BSS) in node send allow send (full name in English: Clear to Send, English Abbreviation: CTS) the corresponding reception power of message is less than preset threshold value, and receives the request that the node in non-BSS is sent It sends (full name in English: Request to Send, english abbreviation: RTS) the corresponding reception power of message and is less than above-mentioned preset threshold Value, then the node in this BSS updates NAV again.

However, when updating NAV by the above method, when the reception power that node receives above two message is respectively less than pre- When setting threshold value, transmitting terminal and receiving end are updated and update NAV again, since the Wireless Fidelity in intensive scene is (English complete Claim: Wireless Fidelity, english abbreviation: WiFi) in system, the reception power of above two message is respectively less than preset threshold The probability of value is less than the probability for being able to carry out the transmission of SR data, therefore, when meeting by above-mentioned condition, NAV is updated, to lead Cause the chance of SR data transmission lower.

Summary of the invention

The present invention provides a kind of method and device updated or modify NAV, and the transmission opportunity of SR data can be improved.

In a first aspect, the embodiment of the invention provides a kind of update or the methods of modification NAV, which comprises

The node of first link monitors the physical layer convergence process agreement that the node in Overlapping Basic Service Set OBSS is sent Node in data cell PPDU, the OBSS includes: the sender node of the second link and the receiving terminal node of the second link, First link is space reuse link, and second link is the link communicated；

The node of first link updates or modifies net according to the reception power of the PPDU and/or PPDU Network allocation vector NAV.

With reference to first aspect, in the first possible implementation of the first aspect,

The node of first link updates or modifies net according to the reception power of the PPDU and/or PPDU It the step of network allocation vector NAV, specifically includes:

If the sender node of first link listens to the first PPDU that the sender node of the second link is sent, Then the sender node of first link keeps the NAV being arranged not update, and the first PPDU includes: that request sends RTS Frame and data Data frame.

The possible implementation of with reference to first aspect the first, in second of possible implementation of first aspect In,

The step of sender node of first link keeps the NAV being arranged not update, later further include:

If the sender node of first link listens to the second of the receiving terminal node transmission of second link PPDU, then the sender node of the first link is according between corresponding reception power and the preset threshold value of reception the 2nd PPDU Size relation and the 2nd PPDU carry big between value and current NAV value in duration Duration field Small relationship, it is determined whether update NAV, the 2nd PPDU includes: to allow to send CTS frame/enhancing to allow to send ECTS frame, connect It receives confirmation ACK frame or uplink data frames, the Duration field is used to indicate the length of transmission opportunity duration TxOP.

The possible implementation of second with reference to first aspect, in the third possible implementation of first aspect In,

The sender node of first link is according to the corresponding reception power of reception the 2nd PPDU and preset threshold value Between size relation and the 2nd PPDU carry value in duration Duration field and current NAV value it Between size relation, it is determined whether update NAV the step of, specifically include:

If the corresponding reception power of the 2nd PPDU of the reception is greater than the preset threshold value, and the 2nd PPDU takes Be greater than the current NAV value of the sender node of first link with the value in duration Duration field, then it is described It is the value in the Duration field that the sender node of first link, which updates the NAV,.

With reference to first aspect, in a fourth possible implementation of the first aspect,

The sender node of first link sent according to the sender node of second link listened to It is big between the value and current NAV value in duration Duration field carried in one PPDU and the first PPDU Small relationship, it is determined whether update the NAV, the Duration field is used to indicate the length of transmission opportunity duration TxOP.

The 4th kind of possible implementation with reference to first aspect, in the 5th kind of possible implementation of first aspect,

The sender node of first link sent according to the sender node of second link listened to It is big between the value and current NAV value in duration Duration field carried in one PPDU and the first PPDU Small relationship, it is determined whether the step of updating the NAV specifically includes:

If the sender node of first link is sent according to the sender node of second link listened to First PPDU, and the value in the Duration field is greater than the current NAV value of the sender node of first link, then It is the value in the Duration field that the sender node of first link, which updates the NAV,.

5th kind of possible implementation with reference to first aspect, in the sixth possible implementation of the first aspect,

If the sender node of first link is sent out according to the sender node of second link listened to The first PPDU sent, and the value in the Duration field is greater than the current NAV of the sender node of first link Value, then the sender node of first link updates the step of NAV is the value in the Duration field, later Further include:

If the sender node of first link listens to the second of the receiving terminal node transmission of second link PPDU, then the sender node of first link according to receive corresponding the receptions power of the 2nd PPDU and preset threshold value it Between size relation, it is determined whether modify updated NAV.

5th kind of possible implementation with reference to first aspect, in the 7th kind of possible implementation of first aspect,

The sender node of first link is according to the corresponding reception power of reception the 2nd PPDU and preset threshold value Between size relation, it is determined whether the step of modifying updated NAV specifically includes:

If the corresponding reception power of the 2nd PPDU that receives is less than the preset threshold value, first link Sender node modifies the updated NAV.

With reference to first aspect, in the 8th kind of possible implementation of first aspect,

The sender node of first link sent according to the sender node of second link listened to One PPDU, update the NAV be first time length, the first time length be the 2nd PPDU transmission time with it is described Short interFrameGap SIFS sum of the two, the SIFS be first link sender node listen to the first PPDU with Listen to the 2nd PPDU time interval between the two.

8th kind of possible implementation with reference to first aspect, in the 9th kind of possible implementation of first aspect,

The sender node of first link sent according to the sender node of second link listened to One PPDU updates the step of NAV is first time length, later further include:

If the first link sender node listen to second link receiving terminal node send second PPDU, then the sender node of first link according to receive corresponding the receptions power of the 2nd PPDU and preset threshold value it Between size relation, it is determined whether modification updated NAV.

The 9th kind of possible implementation with reference to first aspect, in the tenth kind of possible implementation of first aspect In,

The sender node of first link is according to the corresponding reception power of reception the 2nd PPDU and preset threshold value Between size relation, it is determined whether modification updated NAV the step of, specifically include:

With reference to first aspect, in a kind of the tenth possible implementation of first aspect,

If the sender node of first link does not hear the first of the sender node transmission of second link PPDU listens only to the 2nd PPDU that the receiving terminal node of second link is sent, then the transmission end segment of first link Point is taken according to the size relation and the 2nd PPDU that receive the corresponding reception power of the 2nd PPDU and preset threshold value Size relation between the current NAV value of the node of value and first link in the duration Duration field of band, Determine whether to update the NAV.

A kind of possible implementation of the tenth with reference to first aspect, in the 12nd kind of possible implementation of first aspect In,

The sender node of first link is according to receiving the corresponding reception power of the 2nd PPDU and preset threshold Value and first link in the size relation of value and the duration Duration field of the 2nd PPDU carrying Size relation between the current NAV value of sender node, it is determined whether the step of updating the NAV specifically includes:

If the corresponding reception power of the 2nd PPDU that receives is greater than the preset threshold value, and the 2nd PPDU Value in the duration Duration field of carrying is greater than the current NAV value of the node of first link, then and described first The sender node of link updates the NAV.

With reference to first aspect, in the 13rd kind of possible implementation of first aspect,

If the sender node of first link listens to the trigger frame that the receiving terminal node of second link is sent, Then the sender node of first link is closed according to the corresponding size for receiving power and preset threshold value of the trigger frame is received System, it is determined whether update NAV.

The 13rd kind of possible implementation with reference to first aspect, in the 14th kind of possible realization side of first aspect In formula,

The sender node of first link is according to receiving corresponding power and the preset threshold value of receiving of the trigger frame Size relation, it is determined whether the step of updating NAV specifically includes:

If the corresponding reception power of the trigger frame that receives is greater than the preset threshold value, the hair of first link NAV described in sending end node updates；

If the corresponding reception power of the trigger frame that receives is not more than the preset threshold value, first link Sender node keeps the NAV being arranged not update.

The 14th kind of possible implementation with reference to first aspect, in the 15th kind of possible realization side of first aspect In formula,

The sender node of first link is according to receiving corresponding power and the preset threshold value of receiving of the trigger frame Size relation, it is determined whether the step of updating NAV, later further include:

The sender node of first link listens to the first of the sender node transmission of second link PPDU, then updated NAV is not modified for the sender node holding of first link.

With reference to first aspect, in the 16th kind of possible implementation of first aspect,

If the receiving terminal node of first link listens only to the second of the receiving terminal node transmission of second link PPDU, then the receiving terminal node of first link is according to receiving the corresponding reception power of the 2nd PPDU and preset threshold value Size relation and value and first link in the duration Duration field that carries of the 2nd PPDU connect Size relation between the current NAV value of receiving end node, it is determined whether update the NAV, the 2nd PPDU includes: to remove hair CTS frame/enhancing is sent to allow to send ECTS frame, receive confirmation ACK frame.

The 16th kind of possible implementation with reference to first aspect, in the 17th kind of possible realization side of first aspect In formula,

The receiving terminal node of first link is according to receiving the corresponding reception power of the 2nd PPDU and preset threshold Value and first link in the size relation of value and the duration Duration field of the 2nd PPDU carrying Size relation between the current NAV value of receiving terminal node, it is determined whether the step of updating the NAV specifically includes:

If the corresponding reception power of the 2nd PPDU that receives is greater than the preset threshold value, and the 2nd PPDU Value in the duration Duration field of carrying is greater than the current NAV value of the receiving terminal node of first link, then institute The receiving terminal node for stating the first link updates the NAV.

With reference to first aspect, in the 18th kind of possible implementation of first aspect,

If the receiving terminal node of first link listens to the first of the sender node transmission of second link PPDU, then the receiving terminal node of first link keeps the NAV being arranged not update, and the first PPDU includes: request hair Send RTS frame and data Data frame.

The 18th kind of possible implementation with reference to first aspect, in the 19th kind of possible realization side of first aspect In formula,

The step of receiving terminal node of first link keeps the NAV being arranged not update, later further include:

If the receiving terminal node of first link listens to the 2nd PPDU that the receiving end of second link is sent, Then the receiving terminal node of first link is according between corresponding reception power and the preset threshold value of reception the 2nd PPDU The reception for the value and first link in duration Duration field that size relation and the 2nd PPDU are carried Size relation between the current NAV value of end node, it is determined whether update NAV, the 2nd PPDU includes: to allow to send CTS Frame/enhancing allows to send ECTS frame, reception confirmation ACK frame or uplink data frames, the Duration field and is used to indicate The length of transmission opportunity duration TxOP.

The 19th kind of possible implementation with reference to first aspect, in the 20th kind of possible realization side of first aspect In formula,

The receiving terminal node of first link is according to the corresponding reception power of reception the 2nd PPDU and preset threshold value Between size relation and the 2nd PPDU carry duration Duration field in value and first link Receiving terminal node current NAV value between size relation, it is determined whether update NAV the step of, specifically include:

If the corresponding reception power of the 2nd PPDU of the reception is greater than the preset threshold value, and the 2nd PPDU takes Value in the duration Duration field of band is greater than the current NAV value of the receiving terminal node of first link, then described It is the value in the Duration field that the receiving terminal node of first link, which updates the NAV,.

With reference to first aspect, in a kind of the 20th possible implementation of first aspect,

The receiving terminal node of first link sent according to the sender node of second link listened to The reception of the value and first link in duration Duration field carried in one PPDU and the first PPDU Size relation between the current NAV value of end node, it is determined whether update the NAV, the Duration field is used to indicate The length of transmission opportunity duration TxOP.

A kind of possible implementation in the 20th with reference to first aspect, in the 22nd kind of possible realization of first aspect In mode,

The receiving terminal node of first link sent according to the sender node of second link listened to The reception of the value and first link in duration Duration field carried in one PPDU and the first PPDU Size relation between the current NAV value of end node, it is determined whether the step of updating the NAV specifically includes:

If the receiving terminal node of first link is sent according to the sender node of second link listened to First PPDU, and the value in the Duration field is greater than the current NAV value of the receiving terminal node of first link, then It is the value in the Duration field that the receiving terminal node of first link, which updates the NAV,.

A kind of possible implementation in the 20th with reference to first aspect, in the 23rd kind of possible realization of first aspect In mode,

The receiving terminal node of first link sent according to the sender node of second link listened to The reception of the value and first link in duration Duration field carried in one PPDU and the first PPDU Size relation between the current NAV value of end node, it is determined whether the step of updating the NAV, later further include:

If the receiving terminal node of first link listens to the second of the receiving terminal node transmission of second link PPDU, then the receiving terminal node of first link according to receive corresponding the receptions power of the 2nd PPDU and preset threshold value it Between size relation, it is determined whether modification updated NAV.

23rd kind of possible implementation with reference to first aspect, in the 24th kind of possible realization side of first aspect In formula,

The receiving terminal node of first link is according to the corresponding reception power of reception the 2nd PPDU and preset threshold value Between size relation, it is determined whether modification updated NAV the step of, specifically include:

If the corresponding reception power of the 2nd PPDU that receives is less than the preset threshold value, first link Receiving terminal node modifies the updated NAV.

With reference to first aspect, in the 25th kind of possible implementation of first aspect,

The receiving terminal node of first link sent according to the sender node of second link listened to One PPDU, update the NAV be first time length, the first time length be the 2nd PPDU transmission time with it is described Short interFrameGap SIFS sum of the two, the SIFS be first link receiving terminal node listen to the first PPDU with Listen to the 2nd PPDU time interval between the two.

25th kind of possible implementation with reference to first aspect, in the 26th kind of possible realization side of first aspect In formula,

The receiving terminal node of first link sent according to the sender node of second link listened to One PPDU, update the NAV be first time length the step of after, further includes:

26th kind of possible implementation with reference to first aspect, in the 27th kind of possible realization side of first aspect In formula,

With reference to first aspect, in the 28th kind of possible implementation of first aspect,

If the receiving terminal node of first link listens to the trigger frame that the receiving terminal node of second link is sent, Then the receiving terminal node of first link is closed according to the corresponding size for receiving power and preset threshold value of the trigger frame is received System, it is determined whether update NAV.

With reference to first aspect in the 28th kind of possible implementation, in the 29th kind of possible realization of first aspect In mode,

The receiving terminal node of first link is according to receiving corresponding power and the preset threshold value of receiving of the trigger frame Size relation, it is determined whether the step of updating NAV specifically includes:

If the corresponding reception power of the trigger frame that receives is greater than the preset threshold value, first link is connect NAV described in receiving end node updates；

If the corresponding reception power of the trigger frame that receives is not more than the preset threshold value, first link Receiving terminal node keeps the NAV being arranged not update.

29th kind of possible implementation with reference to first aspect, in the 30th kind of possible implementation of first aspect In,

The receiving terminal node of first link is according to receiving corresponding power and the preset threshold value of receiving of the trigger frame Size relation, it is determined whether the step of updating NAV, later further include:

The receiving terminal node of first link listens to the first of the sender node transmission of second link PPDU, then updated NAV is not modified for the receiving terminal node holding of first link.

The first possible implementation appointing to the 30th kind of possible implementation of first aspect with reference to first aspect It anticipates a kind of possible implementation, in a kind of the 30th possible implementation of first aspect,

The preset threshold value is -82dBm, clean channel estimating CCA threshold value, Overlapping Basic Service Set packet detection threshold OBSS Any one in packet detection level and signal sensitivity.

The 16th kind of possible implementation be to the 30th kind of possible implementation of first aspect with reference to first aspect, In a kind of possible implementation in the 30th of first aspect,

The method also includes:

If the receiving terminal node of first link modifies the NAV, when the receiving terminal node of first link connects Receive the data frame that the sender node of the first link is sent, the receiving terminal node of first link is to first link Sender node sends ACK frame；

If the receiving terminal node of first link does not modify the NAV, when the receiving terminal node of the first link receives To the first link sender node send data frame when, the receiving terminal node of first link is not to first link Sender node send the ACK frame.

Second aspect, the embodiment of the invention provides a kind of updates or the device of modification NAV, described device to include:

Monitoring unit is sent in the node of the first link for monitoring the node in Overlapping Basic Service Set OBSS Physical layer convergence process protocol Data Unit PPDU, the OBSS in node include: the second link sender node and The receiving terminal node of second link, first link are space reuse links, and second link is being communicated Link；

It updates or modification unit, in the node of first link, for according to the PPDU and/or described The reception power of PPDU updates or modifies network allocation vector NAV.

In conjunction with second aspect, in the first possible implementation of the second aspect,

The update or modification unit specifically include: the first update or modified module；

Described first updates or modified module, in the sender node of first link, for when described the When the PPDU that the sender node that the sender node of one link listens to the second link is sent, the NAV being arranged is kept It does not update, the first PPDU includes: that request sends RTS frame and data Data frame.

In conjunction with the first possible implementation of second aspect, in second of possible implementation of second aspect In,

The update or modification unit specifically include: the first determining module:

First determining module, positioned at the sender node of the first link, for working as the transmitting terminal of first link When two PPDU that the receiving terminal node that node listens to second link is sent, according to receiving, the 2nd PPDU is corresponding The size relation and the 2nd PPDU received between power and preset threshold value carries duration Duration field In value and current NAV value between size relation, it is determined whether update NAV, the 2nd PPDU include: allow send CTS Frame/enhancing allows to send ECTS frame, reception confirmation ACK frame or uplink data frames, the Duration field and is used to indicate The length of transmission opportunity duration TxOP.

In conjunction with second of possible implementation of second aspect, in the third possible implementation of second aspect In,

First determining module is specifically used for receiving the when described in the sender node of first link The corresponding reception power of two PPDU is greater than the preset threshold value, and the 2nd PPDU carries duration Duration word When the current NAV value for the sender node that the value in section is greater than first link, updating the NAV is the Duration word Value in section.

In conjunction with second aspect, in the fourth possible implementation of the second aspect,

First determining module is also used in the sender node of first link according to described the listened to The duration Duration field carried in the first PPDU and the first PPDU that the sender node of two links is sent In value and current NAV value between size relation, it is determined whether update the NAV, the Duration field is used to indicate The length of transmission opportunity duration TxOP.

In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation of second aspect,

First determining module is specifically used for working as first chain in the sender node of first link The first PPDU that the sender node on road is sent according to the sender node of second link listened to, and it is described When the current NAV value for the sender node that the value in Duration field is greater than first link, the NAV is updated for institute State the value in Duration field.

In conjunction with the 5th kind of possible implementation of second aspect, in the sixth possible implementation of the second aspect,

First determining module is also used in the sender node of first link when first link Sender node listen to second link receiving terminal node send two PPDU when, according to receive described second The corresponding size relation received between power and preset threshold value of PPDU, it is determined whether modify updated NAV.

In conjunction with the 5th kind of possible implementation of second aspect, in the 7th kind of possible implementation of second aspect,

First determining module is specifically used for working as the reception institute in the sender node of first link When stating the corresponding reception power of the 2nd PPDU less than the preset threshold value, the updated NAV is modified.

In conjunction with second aspect, in the 8th kind of possible implementation of second aspect,

First update or modified module are specifically used for basis in the sender node of first link The first PPDU that the sender node of second link listened to is sent, updating the NAV is first time length, described The transmission time and the short interFrameGap SIFS sum of the two that first time length is the 2nd PPDU, the SIFS is described The sender node of first link listens to the first PPDU and listens to the 2nd PPDU time interval between the two.

In conjunction with the 8th kind of possible implementation of second aspect, in the 9th kind of possible implementation of second aspect,

First determining module, in the sender node of first link, be also used to when the first link When two PPDU that the receiving terminal node that sender node listens to second link is sent, according to reception the 2nd PPDU The corresponding size relation received between power and preset threshold value, it is determined whether modify updated NAV.

In conjunction with the 9th kind of possible implementation of second aspect, in the tenth kind of possible implementation of second aspect In,

In conjunction with second aspect, in a kind of the tenth possible implementation of second aspect,

First determining module is also used to the transmitting terminal when the first link in the sender node of first link Node does not hear the first PPDU that the sender node of second link is sent, and listens only to the reception of second link When two PPDU that end node is sent, closed according to the corresponding size for receiving power and preset threshold value of the 2nd PPDU is received Value and the node of first link in duration Duration field that system and the 2nd PPDU are carried it is current Size relation between NAV value, it is determined whether update the NAV.

In conjunction with a kind of the tenth possible implementation of second aspect, in the 12nd kind of possible implementation of second aspect In,

First determining module, in the sender node of first link, specifically for being received when described The corresponding reception power of 2nd PPDU is greater than the preset threshold value, and the duration that the 2nd PPDU is carried When the current NAV value for the node that the value in Duration field is greater than first link, the NAV is updated.

In conjunction with second aspect, in the 13rd kind of possible implementation of second aspect,

First determining module, positioned at the sender node of first link, for working as the hair of first link When the trigger frame that the receiving terminal node that sending end node listens to second link is sent, according to receiving, the trigger frame is corresponding Receive the size relation of power and preset threshold value, it is determined whether update NAV.

In conjunction with the 13rd kind of possible implementation of second aspect, in the 14th kind of possible realization side of second aspect In formula,

First determining module is specifically used for working as the reception institute in the sender node of first link When stating the corresponding reception power of trigger frame greater than the preset threshold value, the NAV is updated；

First determining module is specifically used for working as the reception institute in the sender node of first link When stating the corresponding reception power of trigger frame no more than the preset threshold value, the NAV being arranged is kept not update.

In conjunction with the 14th kind of possible implementation of second aspect, in the 15th kind of possible realization side of second aspect In formula,

First update or modified module, in the sender node of first link, for working as first chain When the PPDU that the sender node that the sender node on road listens to second link is sent, keep updated NAV is not modified.

In conjunction with second aspect, in the 16th kind of possible implementation of second aspect,

The update or modification unit specifically include: the second determining module；

Second determining module is also used in the receiving terminal node of first link when first link Receiving terminal node when listening only to two PPDU that the receiving terminal node of second link is sent, according to receiving described the The duration that the corresponding size relation for receiving power and preset threshold value of two PPDU and the 2nd PPDU are carried Size relation between the current NAV value of the receiving terminal node of value and first link in Duration field, determination are No to update the NAV, the 2nd PPDU includes: that clear to send CTS frame/enhancing allows to send ECTS frame, receives confirmation ACK Frame.

In conjunction with the 16th kind of possible implementation of second aspect, in the 17th kind of possible realization side of second aspect In formula,

Second determining module, in the receiving terminal node of first link, specifically for being received when described The corresponding reception power of 2nd PPDU is greater than the preset threshold value, and the duration that the 2nd PPDU is carried When the current NAV value for the receiving terminal node that the value in Duration field is greater than first link, the NAV is updated.

In conjunction with second aspect, in the 18th kind of possible implementation of second aspect,

Second update or modification unit specifically include: the second update or modified module；

Described second updates or modified module, in the receiving terminal node of first link, for when described the When the PPDU that the sender node that the receiving terminal node of one link listens to second link is sent, holding has been arranged NAV do not update, the first PPDU includes: that request sends RTS frame and data Data frame.

In conjunction with the 18th kind of possible implementation of second aspect, in the 19th kind of possible realization side of second aspect In formula,

Second determining module, in the receiving terminal node of first link, for when first link It is corresponding according to the 2nd PPDU is received when two PPDU that the receiving end that receiving terminal node listens to second link is sent The size relation received between power and preset threshold value and the duration Duration word that carries of the 2nd PPDU Size relation between the current NAV value of the receiving terminal node of value and first link in section, it is determined whether NAV is updated, 2nd PPDU includes: to allow to send CTS frame/enhancing to allow to send ECTS frame, receive confirmation ACK frame or upper line number According to frame, the Duration field is used to indicate the length of transmission opportunity duration TxOP.

In conjunction with the 19th kind of possible implementation of second aspect, in the 20th kind of possible realization side of second aspect In formula,

Second determining module is specifically used for receiving the when described in the receiving terminal node of first link The corresponding reception power of two PPDU is greater than the preset threshold value, and the duration Duration word that the 2nd PPDU is carried When the current NAV value for the receiving terminal node that the value in section is greater than first link, updating the NAV is the Duration word Value in section.

In conjunction with 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 described second listened to In the duration Duration field carried in the first PPDU and the first PPDU that the sender node of link is sent Value and first link receiving terminal node current NAV value between size relation, it is determined whether update the NAV, The Duration field is used to indicate the length of transmission opportunity duration TxOP.

In conjunction with a kind of the 20th possible implementation of second aspect, in the 22nd kind of possible realization of second aspect In mode,

Second determining module is specifically used for working as first link positioned at the receiving terminal node of first link The first PPDU that is sent according to the sender node of second link listened to of receiving terminal node, and it is described When the current NAV value for the receiving terminal node that the value in Duration field is greater than first link, the NAV is updated for institute State the value in Duration field.

In conjunction with a kind of the 20th possible implementation of second aspect, in the 23rd kind of possible realization of second aspect In mode,

Second determining module is also used in the receiving terminal node of first link when first link Receiving terminal node listen to second link receiving terminal node send two PPDU when, according to receive described second The corresponding size relation received between power and preset threshold value of PPDU, it is determined whether modify updated NAV.

In conjunction with the 23rd kind of possible implementation of second aspect, in the 24th kind of possible realization side of second aspect In formula,

Second determining module is specifically used for working as the reception institute in the receiving terminal node of first link When stating the corresponding reception power of the 2nd PPDU less than the preset threshold value, the updated NAV is modified.

In conjunction with second aspect, in the 25th kind of possible implementation of second aspect,

Second update or modified module listen in the receiving terminal node of first link for basis The first PPDU that the sender node of second link is sent, updating the NAV is first time length, the first time The transmission time and the short interFrameGap SIFS sum of the two that length is the 2nd PPDU, the SIFS are first link Receiving terminal node listens to the first PPDU and listens to the 2nd PPDU time interval between the two.

In conjunction with the 25th kind of possible implementation of second aspect, in the 26th kind of possible realization side of second aspect In formula,

In conjunction with the 26th kind of possible implementation of second aspect, in the 27th kind of possible realization side of second aspect In formula,

In conjunction with second aspect, in the 28th kind of possible implementation of second aspect,

Second determining module is also used to connecing when first link in the receiving terminal node of first link When the trigger frame that the receiving terminal node that receiving end node listens to second link is sent, according to receiving, the trigger frame is corresponding Receive the size relation of power and preset threshold value, it is determined whether update NAV.

In conjunction in the 28th kind of possible implementation of second aspect, in the 29th kind of possible realization of second aspect In mode,

Second determining module is specifically used for working as the reception institute in the receiving terminal node of first link When stating the corresponding reception power of trigger frame greater than the preset threshold value, then the NAV is updated；

Second determining module is specifically used for working as the reception institute in the receiving terminal node of first link When stating the corresponding reception power of trigger frame no more than the preset threshold value, the NAV being arranged is kept not update.

In conjunction with the 29th kind of possible implementation of second aspect, in the 30th kind of possible implementation of second aspect In,

Second update or modified module are also used to listen in the receiving terminal node of first link The first PPDU that the sender node of second link is sent, then after the receiving terminal node holding of first link has updated NAV do not modify.

The first possible implementation appointing to the 30th kind of possible implementation of second aspect in conjunction with second aspect It anticipates a kind of possible implementation, in a kind of the 30th possible implementation of second aspect,

In conjunction with the 16th kind of possible implementation of second aspect to the 30th kind of possible implementation of second aspect, In a kind of possible implementation in the 30th of second aspect,

Described device further include: transmission unit；

The transmission unit, in the receiving terminal node of first link, for working as the reception of first link When end node modifies the NAV, and when the receiving terminal node of first link receives the sender node hair of the first link When the data frame sent, the sender node of the first link of Xiang Suoshu sends ACK frame；

The transmission unit is also used to connecing when first link in the receiving terminal node of first link When receiving end node does not modify the NAV, and when the receiving terminal node of the first link receives the sender node hair of the first link When the data frame sent, the ACK frame is not sent to the sender node of first link.

The third aspect, the embodiment of the invention provides a kind of update or the devices of modification NAV, comprising:

Processor, in the node of the first link, for monitoring the transmission of the node in Overlapping Basic Service Set OBSS Node in physical layer convergence process protocol Data Unit PPDU, the OBSS includes: the sender node and of the second link The receiving terminal node of two links, first link are space reuse links, and second link is the chain communicated Road；

The processor, in the node of first link, for according to the PPDU's and/or PPDU Power is received, network allocation vector NAV is updated or modify.

In conjunction with the third aspect, in the first possible implementation of the third aspect,

The processor, in the sender node of first link, specifically for working as the hair of first link When the PPDU that the sender node that sending end node listens to the second link is sent, the NAV being arranged is kept not update, it is described First PPDU includes: that request sends RTS frame and data Data frame.

In conjunction with the first possible implementation of the third aspect, in second of possible implementation of the third aspect In,

The processor, positioned at the sender node of the first link, specifically for working as the transmission end segment of first link When two PPDU that the receiving terminal node that point listens to second link is sent, according to receiving, the 2nd PPDU is corresponding to be connect The size relation and the 2nd PPDU received between power and preset threshold value carry in duration Duration field The size relation being worth between current NAV value, it is determined whether update NAV, the 2nd PPDU include: allow to send CTS frame/ Allow to send ECTS frame, reception confirmation ACK frame or uplink data frames, the Duration field of enhancing are used to indicate transmission The length of chance duration TxOP.

In conjunction with second of possible implementation of the third aspect, in the third possible implementation of the third aspect In,

The processor is specifically used for working as the 2nd PPDU of the reception in the sender node of first link Corresponding reception power is greater than the preset threshold value, and the 2nd PPDU is carried in duration Duration field When value is greater than the current NAV value of the sender node of first link, updating the NAV is in the Duration field Value.

In conjunction with the third aspect, in the fourth possible implementation of the third aspect,

The processor is also used in the sender node of first link according to described second listened to In the duration Duration field carried in the first PPDU and the first PPDU that the sender node of link is sent Value and current NAV value between size relation, it is determined whether update the NAV, the Duration field is used to indicate biography The length of defeated chance duration TxOP.

In conjunction with the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation of the third aspect,

The processor, in the sender node of first link, specifically for working as the hair of first link The first PPDU that sending end node is sent according to the sender node of second link listened to, and the Duration word When the current NAV value for the sender node that the value in section is greater than first link, updating the NAV is the Duration word Value in section.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 6th kind of possible implementation of the third aspect,

The processor is also used to the transmission when first link in the sender node of first link It is corresponding according to the 2nd PPDU is received when two PPDU that the receiving terminal node that end node listens to second link is sent The size relation received between power and preset threshold value, it is determined whether modify updated NAV.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 7th kind of possible implementation of the third aspect,

The processor is specifically used for receiving described second when described in the sender node of first link When the corresponding reception power of PPDU is less than the preset threshold value, the updated NAV is modified.

In conjunction with the third aspect, in the 8th kind of possible implementation of the third aspect,

The processor, in the sender node of first link, specifically for according to described the listened to The first PPDU that the sender node of two links is sent, updating the NAV is first time length, and the first time length is The transmission time of 2nd PPDU and the short interFrameGap SIFS sum of the two, the SIFS are the transmitting terminal of first link Node listens to the first PPDU and listens to the 2nd PPDU time interval between the two.

In conjunction with the 8th kind of possible implementation of the third aspect, in the 9th kind of possible implementation of the third aspect,

The processor, in the sender node of first link, be also used to when the first link transmitting terminal When two PPDU that the receiving terminal node that node listens to second link is sent, according to receiving, the 2nd PPDU is corresponding Receive the size relation between power and preset threshold value, it is determined whether modify updated NAV.

In conjunction with the 9th kind of possible implementation of the third aspect, in the tenth kind of possible implementation of the third aspect In,

In conjunction with the third aspect, in a kind of the tenth possible implementation of the third aspect,

The processor is also used to the transmission end segment when the first link in the sender node of first link Point does not hear the first PPDU that the sender node of second link is sent, and listens only to the receiving end of second link When two PPDU that node is sent, according to the size relation for receiving the corresponding reception power and preset threshold value of the 2nd PPDU And the current NAV of the node of the value and first link in the duration Duration field of the 2nd PPDU carrying Size relation between value, it is determined whether update the NAV.

In conjunction with a kind of the tenth possible implementation of the third aspect, in the 12nd kind of possible implementation of the third aspect In,

The processor, in the sender node of first link, specifically for receive described the when described The corresponding reception power of two PPDU is greater than the preset threshold value, and the duration Duration field that the 2nd PPDU is carried In value be greater than first link node current NAV value when, update the NAV.

In conjunction with 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 working as the transmission end segment of first link When the trigger frame that the receiving terminal node that point listens to second link is sent, according to the corresponding reception function of the reception trigger frame The size relation of rate and preset threshold value, it is determined whether update NAV.

In conjunction with the 13rd kind of possible implementation of the third aspect, in the 14th kind of possible realization side of the third aspect In formula,

The processor is specifically used for receiving the triggering when described in the sender node of first link When the corresponding reception power of frame is greater than the preset threshold value, the NAV is updated；

The processor is specifically used for receiving the triggering when described in the sender node of first link When the corresponding reception power of frame is not more than the preset threshold value, the NAV being arranged is kept not update.

In conjunction with the 14th kind of possible implementation of the third aspect, in the 15th kind of possible realization side of the third aspect In formula,

The processor is also used to the transmission when first link in the sender node of first link When the PPDU that the sender node that end node listens to second link is sent, updated NAV is not modified for holding.

In conjunction with the third aspect, in the 16th kind of possible implementation of the third aspect,

The processor is also used to the reception when first link in the receiving terminal node of first link When two PPDU that the receiving terminal node that end node listens only to second link is sent, according to receiving the 2nd PPDU The duration Duration field that the corresponding size relation for receiving power and preset threshold value and the 2nd PPDU are carried In value and first link receiving terminal node current NAV value between size relation, it is determined whether described in update NAV, the 2nd PPDU include: that clear to send CTS frame/enhancing allows to send ECTS frame, receives confirmation ACK frame.

In conjunction with the 16th kind of possible implementation of the third aspect, in the 17th kind of possible realization side of the third aspect In formula,

The processor, in the receiving terminal node of first link, specifically for receive described the when described The corresponding reception power of two PPDU is greater than the preset threshold value, and the duration Duration field that the 2nd PPDU is carried In value be greater than first link receiving terminal node current NAV value when, update the NAV.

In conjunction with the third aspect, in the 18th kind of possible implementation of the third aspect,

The processor is also used to the reception when first link in the receiving terminal node of first link When the PPDU that the sender node that end node listens to second link is sent, the NAV being arranged is kept not update, institute Stating the first PPDU includes: that request sends RTS frame and data Data frame.

In conjunction with the 18th kind of possible implementation of the third aspect, in the 19th kind of possible realization side of the third aspect In formula,

The processor is also used to the reception when first link in the receiving terminal node of first link When two PPDU that the receiving end that end node listens to second link is sent, according to receiving, the 2nd PPDU is corresponding to be connect It receives in the duration Duration field that size relation and the 2nd PPDU between power and preset threshold value carry The size relation being worth between the current NAV value the receiving terminal node of first link, it is determined whether update NAV, described the Two PPDU include: to allow to send CTS frame/enhancing to allow to send ECTS frame, receive confirmation ACK frame or uplink data frames, institute State the length that Duration field is used to indicate transmission opportunity duration TxOP.

In conjunction with the 19th kind of possible implementation of the third aspect, in the 20th kind of possible realization side of the third aspect In formula,

The processor is specifically used for working as the 2nd PPDU of the reception in the receiving terminal node of first link Corresponding reception power is greater than the preset threshold value, and in the duration Duration field of the 2nd PPDU carrying When value is greater than the current NAV value of the receiving terminal node of first link, updating the NAV is in the Duration field Value.

In conjunction with the third aspect, in a kind of the 20th possible implementation of the third aspect,

The processor is also used in the receiving terminal node of first link according to described second listened to In the duration Duration field carried in the first PPDU and the first PPDU that the sender node of link is sent Value and first link receiving terminal node current NAV value between size relation, it is determined whether update the NAV, The Duration field is used to indicate the length of transmission opportunity duration TxOP.

In conjunction with a kind of the 20th possible implementation of the third aspect, in the 22nd kind of possible realization of the third aspect In mode,

The processor, positioned at the receiving terminal node of first link, specifically for working as the reception of first link The first PPDU that end node is sent according to the sender node of second link listened to, and the Duration field In the value receiving terminal node that is greater than first link current NAV value when, update the NAV for the Duration field In value.

In conjunction with a kind of the 20th possible implementation of the third aspect, in the 23rd kind of possible realization of the third aspect In mode,

The processor is also used to the reception when first link in the receiving terminal node of first link It is corresponding according to the 2nd PPDU is received when two PPDU that the receiving terminal node that end node listens to second link is sent The size relation received between power and preset threshold value, it is determined whether modification updated NAV.

In conjunction with the 23rd kind of possible implementation of the third aspect, in the 24th kind of possible realization side of the third aspect In formula,

The processor is specifically used for receiving described second when described in the receiving terminal node of first link When the corresponding reception power of PPDU is less than the preset threshold value, the updated NAV is modified.

In conjunction with the third aspect, in the 25th kind of possible implementation of the third aspect,

The processor is also used in the receiving terminal node of first link according to described second listened to The first PPDU that the sender node of link is sent, updating the NAV is first time length, and the first time length is the The transmission time of two PPDU and the short interFrameGap SIFS sum of the two, the SIFS are the receiving end of first link Node listens to the first PPDU and listens to the 2nd PPDU time interval between the two.

In conjunction with the 25th kind of possible implementation of the third aspect, in the 26th kind of possible realization side of the third aspect In formula,

In conjunction with the 26th kind of possible implementation of the third aspect, in the 27th kind of possible realization side of the third aspect In formula,

In conjunction with the third aspect, in the 28th kind of possible implementation of the third aspect,

The processor is also used to the reception when first link in the receiving terminal node of first link When the trigger frame that the receiving terminal node that end node listens to second link is sent, according to receiving, the trigger frame is corresponding to be connect Receive the size relation of power and preset threshold value, it is determined whether update NAV.

In conjunction in the 28th kind of possible implementation of the third aspect, in the 29th kind of possible realization of the third aspect In mode,

The processor is specifically used for receiving the triggering when described in the receiving terminal node of first link When the corresponding reception power of frame is greater than the preset threshold value, then the NAV is updated；

The processor is specifically used for receiving the triggering when described in the receiving terminal node of first link When the corresponding reception power of frame is not more than the preset threshold value, the NAV being arranged is kept not update.

In conjunction with the 29th kind of possible implementation of the third aspect, in the 30th kind of possible implementation of the third aspect In,

The processor is also used to listen to second link in the receiving terminal node of first link The first PPDU that sender node is sent, then updated NAV is not modified for the receiving terminal node holding of first link.

The first possible implementation appointing to the 30th kind of possible implementation of the third aspect in conjunction with the third aspect It anticipates a kind of possible implementation, in a kind of the 30th possible implementation of the third aspect,

In conjunction with the 16th kind of possible implementation of the third aspect to the 30th kind of possible implementation of the third aspect, In a kind of possible implementation in the 30th of the third aspect,

Described device further include: transceiver；

The transceiver, in the receiving terminal node of first link, for working as the receiving end of first link When node modifies the NAV, and when the sender node that the receiving terminal node of first link receives the first link is sent Data frame when, the sender node of the first link of Xiang Suoshu sends ACK frame；

The transceiver is also used to the reception when first link in the receiving terminal node of first link When end node does not modify the NAV, and when the sender node that the receiving terminal node of the first link receives the first link is sent Data frame when, do not send the ACK frame to the sender node of first link.

The method and device of update or modification NAV provided by the invention, the node of the first link first listen to overlapping base The physical layer convergence process protocol Data Unit PPDU that node in this services set OBSS is sent, wherein the node packet in OBSS Include: the receiving terminal node of the sender node of the second link and the second link, the first link are space reuse link, the second link It is the link communicated, then according to the reception power of PPDU and/or PPDU, updates or modification network distribution is sweared Measure NAV.Compared with updating NAV by the method for the prior art at present, the node of space reuse link of the present invention is according to whether connect Receive the PPDU of the sender node transmission of the link communicated and the receiving terminal node hair of communicating link The PPDU sent, and can connecing according to the sender node or communicating link for receiving communicating link The corresponding reception power of PPDU that receiving end node is sent updates or modifies NAV, rather than works as the transmitting terminal of space reuse link When node is respectively less than preset threshold value, NAV can be just updated or modify, so as to reduce the node updates of space reuse link Or the probability of modification NAV, and then the chance of space reuse data transmission can be improved.

Detailed description of the invention

It, below will be to the present invention or the prior art in order to illustrate more clearly of the present invention or technical solution in the prior art Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other attached drawings.

Fig. 1 is the method flow diagram that NAV is updated or modified in the embodiment of the present invention；

Fig. 2 is another method flow diagram updated or modify NAV in the embodiment of the present invention；

Fig. 3 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Fig. 4 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Fig. 5 is a kind of update of the embodiment of the present invention or the schematic diagram of modification NAV；

Fig. 6 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Fig. 7 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Fig. 8 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Fig. 9 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 10 is another schematic diagram updated or modify NAV in the embodiment of the present invention；

Figure 11 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 12 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 13 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 14 is that another in the embodiment of the present invention updates or modify the schematic diagram of NAV；

Figure 15 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 16 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 17 is that another in the embodiment of the present invention updates or modify the schematic diagram of NAV；

Figure 18 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 19 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 20 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 21 is that another in the embodiment of the present invention updates or modify the schematic diagram of NAV；

Figure 22 is that another in the embodiment of the present invention updates or modify the method flow diagram of NAV；

Figure 23 is a kind of update of the embodiment of the present invention or the schematic device for modifying NAV；

Figure 24 is another schematic device updated or modify NAV of the embodiment of the present invention；

Figure 25 is another structural schematic diagram updated or modify NAV of the embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.

The embodiment of the present invention provides a kind of method updated or modify NAV, can be improved the chance of SR data transmission, such as Shown in Fig. 1, which comprises

101, the node of the first link monitors the physical layer convergence process that the node in Overlapping Basic Service Set OBSS is sent Protocol Data Unit PPDU.

Wherein, Overlapping Basic Service Set (full name in English: overlap Basic Service Set, english abbreviation: OBSS the node in) includes: the sender node of the second link and the receiving terminal node of the second link, and the first link is space weight With link, the second link is the link communicated.

Wherein, the node of the second link includes: the sender node and ongoing link of existing ongoing link Receiving terminal node, ongoing link are the link communicated.

For the embodiment of the present invention, in the case that ongoing link has existed, other links are not can be carried out information biography Defeated.Under space reuse technology, the second link under certain conditions, can carry out parallel transmission, and this second link is exactly SR link.

For the embodiment of the present invention, when channel idle, the link for arriving channel is competed first, is ongoing chain Road.

For the embodiment of the present invention, the sender node and receiving terminal node of SR link and the transmission of ongoing link End node and receiving terminal node, the basic service different positioned at two for there is overlapping are concentrated.

102, the node of the first link updates according to the reception power of PPDU and/or PPDU or modification network distribution is sweared Measure NAV.

For the embodiment of the present invention, NAV is used in virtual carrier monitoring, functions as a counter, wherein NAV for virtual reflection channel it is busy with it is not busy, wherein NAV is non-zero be it is busy, 0 is not busy.In embodiments of the present invention, NAV is modified For the NAV is reset to 0, wherein updating in the time that NAV is NAV setting does not allow parallel transmission, and NAV is reset to 0, Characterizing the link can be with parallel transmission.

For the embodiment of the present invention, SR link transmitting terminal node is according to whether listen to the ongoing link hair in OBSS The PPDU that sending end node and/or the node of ongoing link receiving end are sent, and work as and receive ongoing link in OBSS The PPDU that the node of sender node and/or ongoing link receiving end is sent can be sent out according to ongoing link is received The PPDU that the reception power and/or reception ongoing link receiving terminal node for the PPDU that sending end node is sent are sent is corresponding to be connect Receive power, it is determined whether update or modify NAV.

For the embodiment of the present invention, modifying NAV is the value before the NAV to be reset to 0 or is revised as updating by NAV. Wherein, before the PPDU that the node that the value before the update receives the second link for the node of the first link is sent, the first chain The corresponding value of the NAV of the node on road.

The method of update or modification NAV provided in an embodiment of the present invention, the sender node of spatial reuse SR link are first It first monitors in physical layer convergence process the protocol Data Unit PPDU, OBSS that the node in Overlapping Basic Service Set OBSS is sent Node includes: the sender node of existing ongoing link and the receiving terminal node of ongoing link, then according to monitoring The PPDU's and/or PPDU of the receiving terminal node transmission of the sender node and ongoing link of the ongoing link arrived Power is received, network allocation vector NAV is updated or modify.Compared with updating NAV by the method for the prior art at present, this hair The sender node of bright embodiment SR link according to whether receive the transmission of ongoing link transmitting terminal PPDU and The PPDU that ongoing link receiving end is sent, and can be according to receiving ongoing link transmitting terminal or ongoing chain The corresponding reception power of PPDU that road receiving end is sent updates or modifies NAV, rather than when SR link transmitting terminal is respectively less than pre- When setting threshold value, it can just update and perhaps modify the probability that NAV updates so as to SR link transmitting terminal or modify NAV, in turn The chance of SR data transmission 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 first chain The node on road updates or modifies network allocation vector NAV according to the reception power of PPDU and/or PPDU, specifically include such as figure Step 201 shown in 2.

If 201, the node of the first link listens to the first PPDU that the sender node of the second link is sent, the first chain The sender node on road keeps the NAV being arranged not update.

Wherein, the first PPDU includes: that request sends RTS frame and data Data frame.

The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 2, if step 201, first The node of link listens to the first PPDU that the sender node of the second link is sent, then the sender node of the first link is kept The step of NAV being arranged does not update include thes steps that as shown in Figure 3 301 later.

If 301, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link is sent, the first chain The node on road is taken according to the size relation and the 2nd PPDU that receive between the corresponding reception power of the 2nd PPDU and preset threshold value With the size relation between the value and current NAV value in duration Duration field, it is determined whether update NAV.

Wherein, the 2nd PPDU includes: to allow to send CTS frame, receives confirmation ACK frame or uplink data frames, Duration Field is used to indicate the length of transmission opportunity duration (full name in English: transmission opportunity, english abbreviation: TxOP) Degree, wherein the length of TXOP characterizes the transmission time of second link, and in this transmission period, other links are not available for Information transmission.

Wherein, preset threshold value is -82dBm, clean channel estimating (full name in English: Clear Channel Assessment, english abbreviation: CCA) threshold value, Overlapping Basic Service Set packet detection threshold OBSS packet detection Any one in level and signal sensitivity.

For the embodiment of the present invention, when the sender node of the first link first listens to the sender node to the second link When the PPDU sent, the sender node of the first link keeps updated NAV, then when listening to connecing for the second link When two PPDU that receiving end node is sent, the sender node of the first link according to receiving the corresponding reception power of the 2nd PPDU, Determine whether to update NAV.

For example, the first PPDU can be RTS, the 2nd PPDU can be confirmed character (full name in English: Acknowledgement, english abbreviation: ACK), it is sent when the sender node of the first link receives the second link transmitting terminal RTS when, do not update and do not modify NAV, when the sender node of the first link receive the second link receiving terminal node send CTS when, determine whether to update or modification NAV according to corresponding the receptions power of CTS is received.

The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 3, if step 301, first The node of link listens to the 2nd PPDU that the receiving terminal node of the second link is sent, then the node of the first link is according to receiving the The corresponding size relation received between power and preset threshold value of two PPDU and the 2nd PPDU carry the duration The size relation between value and current NAV value in Duration field, it is determined whether update NAV, can specifically include such as Fig. 4 Shown step 401.

If 401, the node of the first link listens to the 2nd PPDU of the transmission of the second link receiving end in OBSS, when The corresponding reception power of the 2nd PPDU is received greater than preset threshold value, and the 2nd PPDU carries duration Duration field In the value sender node that is greater than the first link current NAV value when, the node updates NAV of the first link is Duration word Value in section.

For the embodiment of the present invention, if the node of the first link listens to the second link receiving end is sent in OBSS second PPDU, then when receiving corresponding the receptions power of the 2nd PPDU greater than preset threshold value, and the 2nd PPDU carries the duration When the current NAV value for the node that the value in Duration field is not more than the first link, 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 2nd PPDU of the second link receiving end transmission, Then when receiving the corresponding reception power of the 2nd PPDU no more than preset threshold value, then the node of the first link does not update NAV.

For the embodiment of the present invention, when the node of the first link listens to the first of the sender node transmission of the second link When PPDU, the node of the first link does not update NAV, if the 2nd PPDU that the receiving terminal node for listening to the second link is sent, The node of first link is according to the reception power for receiving the 2nd PPDU, it is determined whether updates NAV, 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 first chain The node on road updates or modifies network allocation vector NAV according to the reception power of PPDU and/or PPDU, specifically include such as figure Step 601 shown in 6.

601, the first PPDU that the node of the first link is sent according to the sender node of the second link listened to, with And the size relation between the first value and current NAV value in the duration Duration field that carries in PPDU, determination are No update NAV.

Wherein, Duration field is 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, the first chain What is carried in the first PPDU and the first PPDU that the node on road is sent according to the sender node of the second link listened to holds The size relation between value and current NAV value in continuous time Duration field, it is determined whether update NAV, specifically include as Step 701 shown in Fig. 7.

If 701, the first PPDU that the node of the first link is sent according to the sender node of the second link listened to, And the value in Duration field is greater than the current NAV value of the node of the first link, then the node updates NAV of the first link is Value in Duration field.

For the embodiment of the present invention, if the node of the first link is sent according to the sender node of the second link listened to The first PPDU, and the value in Duration field is no more than the current NAV value of the node of the first link, then the first link Node do not update the NAV value.

The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in Figure 7, if step 701, first The first PPDU that the node of link is sent according to the sender node of the second link listened to, and in Duration field Value be greater than the first link node current NAV value, then the node updates NAV of the first link be Duration field in Value, include thes steps that as shown in Figure 8 801 later.

If 801, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link is sent, the first chain The node on road is according to the size relation received between the corresponding reception power of the 2nd PPDU and preset threshold value, it is determined whether modification is Updated NAV.

For the embodiment of the present invention, updated NAV is that NAV is reset to 0 or is revised as NAV to update it for modification Preceding value.Wherein, the value before the update is that the node of the first link receives the sender node of the second link is sent the Before one PPDU, the corresponding value of the 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, if step 801, first The node of link listens to the 2nd PPDU that the receiving terminal node of the second link is sent, then the node of the first link is according to receiving the The corresponding size relation received between power and preset threshold value of two PPDU, it is determined whether modify updated NAV, specifically may be used To include the steps that as shown in Figure 9 901.

If 901, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link is sent, work as reception When the corresponding reception power of 2nd PPDU is less than preset threshold value, the node of the first link modifies updated NAV.

For the embodiment of the present invention, if the node of the first link listens to the second of the receiving terminal node transmission of the second link PPDU, then when the node of the first link receives the corresponding reception power of the 2nd PPDU not less than preset threshold value, the first link Node keep updated NAV, without modification.Wherein, the first link node modification updated NAV be will Updated NAV resets to 0 or updated NAV has been revised as the value before update by this.Wherein, the value before the update For the first link node receive the second link sender node send the first PPDU before, the node of the first link The corresponding value of NAV.

For example, the node of the first link is before the first PPDU that the sender node for receiving the second link is sent, the The corresponding value of the NAV of one link is 2, and the value of NAV is 5 after update, then when the corresponding reception power of the 2nd PPDU of reception is less than When preset threshold value, which is reset to 0 or is revised as the NAV to receive the transmission of the second link by the node of the first link Value before the first PPDU that end node is sent, as 2.

For example, the RTS frame that the node of the first link is sent according to the sender node of the second link, then according in RTS frame The size relation between value and current NAV value in the duration Duration field of carrying, it is determined whether update NAV, so Afterwards the node of the first link according to receive the second link receiving terminal node send the corresponding reception power of CTS frame with it is preset Size relation between threshold value, it is determined whether modify the NAV.

For the embodiment of the present invention, when the node of the first link listens to the first of the sender node transmission of the second link It is big between the value and current NAV value in Duration field that the node of the first link is carried according to the first PPDU when PPDU Small relationship determines whether to update NAV, if the 2nd PPDU that the receiving terminal node for listening to the second link is sent, the first link Node is according to the reception power for receiving the 2nd PPDU, it is determined whether modification NAV, 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 first chain The node on road updates or modifies network allocation vector NAV according to the reception power of PPDU and/or PPDU, specifically include such as figure Step 1101 shown in 11.

1101, the first PPDU that the node of the first link is sent according to the sender node of the second link listened to, more New NAV is first time length.

Wherein, transmission time and short interFrameGap SIFS sum of the two that first time length is the 2nd PPDU, SIFS are The node of first link listens to the first PPDU and listens to the 2nd PPDU time interval between the two.

The alternatively possible implementation of the embodiment of the present invention, on the basis of as shown in figure 11, step 1101, the The first PPDU that the node of one link is sent according to the sender node of the second link listened to, updating NAV is at the first time Length include thes steps that as shown in figure 12 1201 later.

If 1201, the node of the first link listen to the second link receiving terminal node send the 2nd PPDU, first The node of link is according to the size relation received between the corresponding reception power of the 2nd PPDU and preset threshold value, it is determined whether modification Updated NAV.

Wherein, the 2nd PPDU includes: to allow to send CTS frame, receives confirmation ACK frame or uplink data frames.

For the embodiment of the present invention, updated NAV is that the NAV is reset to 0 or is revised as the NAV for modification Value before update.Wherein, the value before the update is that the node of the first link receives the sender node hair of the second link Before the first PPDU sent, the corresponding value of the 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, if step 1201, The node of first link listens to the 2nd PPDU that the receiving terminal node of the second link is sent, then the node of the first link is according to connecing Receive the corresponding size relation received between power and preset threshold value of the 2nd PPDU, it is determined whether modify updated NAV, tool Body includes the steps that as shown in figure 13 1301.

If 1301, the node of the first link listens to the 2nd PPDU that the receiving terminal node of the second link is sent, when connecing When receiving the corresponding reception power of the 2nd PPDU less than preset threshold value, the node of the first link modifies updated NAV.

For the embodiment of the present invention, if the node of the first link listens to the second of the receiving terminal node transmission of the second link PPDU, then when receiving the corresponding reception power of the 2nd PPDU not less than preset threshold value, the node of the first link has not been modified more NAV after new.

For the embodiment of the present invention, when the node of the first link listens to the first of the sender node transmission of the second link When PPDU, the node updates NAV of the first link is the transmission time and short interFrameGap SIFS sum of the two of the 2nd PPDU, if prison Hear the 2nd PPDU that the receiving terminal node of the second link is sent, then the node of the first link connecing according to the 2nd PPDU of reception Receive power, 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 first chain The node on road updates or modifies network allocation vector NAV according to the reception power of PPDU and/or PPDU, specifically include such as figure Step 1501 shown in 15.

If 1501, the node of the first link does not hear the first PPDU that the sender node of the second link is sent, only supervise Hear the 2nd PPDU that the receiving terminal node of the second link is sent, then the node of the first link is corresponding according to the 2nd PPDU is received The size relation for receiving power and preset threshold value and the duration Duration field that carries of the 2nd PPDU in value with Size relation between the current NAV value of the node of first link, 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, if step 1501, The node of first link does not hear the first PPDU that the sender node of the second link is sent, and listens only to connecing to the second link Receiving end node send the 2nd PPDU, then the node of the first link according to receive the corresponding reception power of the 2nd PPDU with it is preset Size relation between threshold value, it is determined whether update NAV, specifically include step 1601 as shown in figure 16.

If 1601, receiving the corresponding reception power of the 2nd PPDU greater than preset threshold value, and continuing of carrying of the 2nd PPDU Value in time Duration field is greater than the current NAV value of the node of the first link, then the node updates NAV of the first link.

For the embodiment of the present invention, if receiving the corresponding reception power of the 2nd PPDU no more than preset threshold value, Huo Zhe The value in duration Duration field that two PPDU are carried no more than the node of the first link current NAV value, then first The node of link keeps the NAV being arranged, and does not update NAV.

For the embodiment of the present invention, when the receiving terminal node that the node of the first link only receives the second link send the Two PPDU, and the first PPDU that the sender node for not hearing the second link is sent, then the node of the first link is according only to connecing Receive the value and the first link of the 2nd PPDU received in the duration Duration field that power and the 2nd PPDU are carried Node current NAV value size relation, 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 first chain The node on road updates or modifies network allocation vector NAV according to the reception power of PPDU and/or PPDU, specifically include such as figure Step 1801 shown in 18.

If 1801, the sender node of the first link listens to the trigger frame that the receiving terminal node of the second link is sent, The sender node of first link is according to the size relation for receiving the corresponding reception power and preset threshold value of trigger frame, 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 is sent, the node energy of the first link The trigger frame that the receiving terminal node of the second link is sent enough is listened to, then the node of the first link connecing according to the reception trigger frame Receive power and preset threshold value size relation, it is determined whether update NAV.

Wherein, preset threshold value is -82dBm, clean channel estimating CCA threshold value, Overlapping Basic Service Set packet detection threshold Any one in 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, if step 1801, The node of first link listens to the trigger frame that the receiving terminal node of the second link is sent, then the node of the first link is according to reception The corresponding size relation for receiving power and preset threshold value of trigger frame, it is determined whether update NAV, specifically include as shown in figure 19 Step 1901-1902.

If 1901, the node of the first link listens to the trigger frame that the receiving terminal node of the second link is sent, work as reception When the corresponding reception power of trigger frame is greater than preset threshold value, the node updates NAV of the first link.

It for example, preset threshold value is -82dBm, is -80dBm when receiving corresponding the receptions power of trigger frame, then the first link Node updates NAV.

If 1902, the node of the first link listens to the trigger frame that the receiving terminal node of the second link is sent, work as reception When the corresponding reception power of trigger frame is not more than preset threshold value, the node of the first link keeps the NAV being arranged not update.

It for example, preset threshold value is -82dBm, is -85dBm when receiving corresponding the receptions power of trigger frame, then the first link Node keeps the NAV being arranged not update.

Alternatively possible implementation shown in the embodiment of the present invention, on the basis of as shown in figure 19, step 1801, If the node of the first link listens to the trigger frame that the receiving terminal node of the second link is sent, the node of the first link is according to connecing Receive the corresponding size relation for receiving power and preset threshold value of trigger frame, it is determined whether update NAV, later further include such as Figure 20 institute The step 2001 shown.

If 2001, the node of the first link listen to the second link sender node send the first PPDU, first Updated NAV is not modified for the node holding of link.

For the embodiment of the present invention, when the triggering that the receiving terminal node that the node of the first link receives the second link is sent When frame, the node of the first link determines whether to update NAV according to the reception power for receiving the trigger frame, and later when the first chain The node on road receives the first PPDU that the sender node of the second link is sent, and keeps updated NAV not modify, such as Figure 21 It is shown.

The alternatively possible implementation of the embodiment of the present invention, the method also includes the steps 4 as shown in Fig. 22 201-4 202。

If the node of the 4 201, first link is the receiving terminal node of the first link, and the receiving terminal node of the first link Modify NAV, then when the data frame that the sender node that the receiving terminal node of the first link receives the first link is sent, first The receiving terminal node of link sends ACK frame to the sender node of the first link.

For the embodiment of the present invention, when NAV is reset to connecing for the 0, and first link by the receiving terminal node of the first link When the sender node that receiving end node receives the first link sends data frame, the receiving terminal node of the first link is to the first link Sender node send ACK frame.

If the node of the 4 202, first link is the receiving terminal node of the first link, and the receiving terminal node of the first link Do not modify NAV, then when the data frame that the sender node that the receiving terminal node of the first link receives the first link is sent, the The receiving terminal node of one link does not send ACK frame to the sender node of the first link.

For the embodiment of the present invention, the receiving terminal node of the first link does not modify the reception end segment that NAV includes: the first link Point updates NAV and the receiving terminal node of the first link keeps the NAV being arranged.

For the embodiment of the present invention, when the receiving terminal node of the first link is only to update NAV, which is not reset to 0, And when the data frame that the sender node that the receiving terminal node of the first link receives the first link is sent, the first link is connect Receiving end node does not send ACK frame to the sender node of first link.

Further, as the realization to method shown in Fig. 1 and Figure 22, the embodiment of the invention also provides a kind of update or Person modifies the device of NAV, and for improving the transmission opportunity of SR data, as shown in figure 23, device includes: monitoring unit 2301, more New or modification unit 2302.

Monitoring unit 2301, 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.

Wherein, the node in OBSS includes: the sender node of the second link and the receiving terminal node of the second link, and first Link is space reuse link, and the second link is the link communicated.

It updates or modification unit 2302 is used for connecing according to PPDU and/or PPDU in the node of the first link Power is received, network allocation vector NAV is updated or modify.

Further, as shown in figure 24, it updates or modifies unit 2302 and specifically include: the first update or modified module 23021；

First update or modified module 23021 are supervised in the node of the first link for the node when the first link When hearing the PPDU that the sender node of the second link is sent, the NAV being arranged is kept not update.

It updates or modification unit 2302 specifically includes: the first determining module 23022.

First determining module 23022, positioned at the node of the first link, for the sender node unlisten when the first link The first PPDU sent to the sender node of the second link, listens only to send to the receiving terminal node of the second link second When PPDU, carried according to the size relation and the 2nd PPDU that receive the corresponding reception power of the 2nd PPDU and preset threshold value Size relation between the current NAV value of the node of value and the first link in duration Duration field, it is determined whether Update NAV.

Wherein, the 2nd PPDU include: allow send CTS frame/enhancing allow send ECTS frame, receive confirmation ACK frame or Person's uplink data frames, Duration field are used to indicate the length of transmission opportunity duration TxOP.

First determining module 23022 is specifically used for corresponding when receiving the 2nd PPDU in the node of the first link It receives power and is greater than preset threshold value, and the 2nd PPDU carries the value in duration Duration field greater than the first link Node current NAV value when, update NAV be Duration field in value.

First determining module 23022 is also used to the hair according to the second link listened in the node of the first link Value in the first PPDU and the first PPDU that sending end node is sent in the duration Duration field that carries and current Size relation between NAV value, it is determined whether update NAV, Duration field is used to indicate the length of transmission opportunity duration TxOP Degree.

First determining module 23022, in the node of the first link, specifically for the node when the first link according to prison The first PPDU that the sender node for the second link heard is sent, and the value in Duration field is greater than the first link When the current NAV value of node, updating NAV is the value in Duration field.

First determining module 23022 is also used to the node when the first link and listens to the in the node of the first link When two PPDU that the receiving terminal nodes of two links is sent, according to receive corresponding the receptions power of the 2nd PPDU and preset threshold value it Between size relation, it is determined whether modify updated NAV.

First determining module 23022 is specifically used for corresponding when receiving the 2nd PPDU in the node of the first link When receiving power less than preset threshold value, updated NAV is modified.

First update or modified module, in the node of the first link, specifically for according to the second chain listened to The first PPDU that the sender node on road is sent, update NAV are first time length.

First determining module 23022, in the node of the first link, be also used to when the node of the first link listen to When two PPDU that the receiving terminal node of the second link is sent, according to the corresponding reception power of the 2nd PPDU of reception and preset threshold value Between size relation, it is determined whether modification updated NAV.

First determining module 23022 is also used to not hear when the node of the first link in the node of the first link The first PPDU that the sender node of second link is sent listens only to the 2nd PPDU sent to the receiving terminal node of the second link When, according to the size relation received between the corresponding reception power of the 2nd PPDU and preset threshold value, it is determined whether update NAV.

First determining module 23022, in the node of the first link, specifically for corresponding when receiving the 2nd PPDU Reception power be greater than preset threshold value when, update NAV.

First determining module 23022 listens to the second chain for the node when the first link positioned at the node of the first link When the trigger frame that the receiving terminal node on road is sent, closed according to the corresponding size for receiving power and preset threshold value of trigger frame is received System, it is determined whether update NAV.

First determining module 23022 is specifically used in the node of the first link when the corresponding reception of reception trigger frame When power is greater than preset threshold value, NAV is updated.

First determining module 23022 is specifically used in the node of the first link when the corresponding reception of reception trigger frame When power is not more than preset threshold value, the NAV being arranged is kept not update.

First update or modified module listen in the node of the first link for the node when the first link When the PPDU that the sender node of the second link is sent, updated NAV is not modified for holding.

The device further include: transmission unit 2401.

Transmission unit 2401 is repaired in the receiving terminal node of the first link for the receiving terminal node when the first link When changing NAV, and when the data frame that the sender node that the receiving terminal node of the first link receives the first link is sent, to the The sender node of one link sends ACK frame.

Transmission unit 2401 is also used to the receiving terminal node when the first link in the receiving terminal node of the first link When not modifying NAV, and when the data frame that the sender node that the receiving terminal node of the first link receives the first link is sent, ACK frame is not sent to the sender node of the first link.

The device of update or modification NAV provided in an embodiment of the present invention, the node of the first link first listen to overlapping base The physical layer convergence process protocol Data Unit PPDU that node in this services set OBSS is sent, wherein the node packet in OBSS Include: the receiving terminal node of the sender node of the second link and the second link, the first link are space reuse link, the second link It is the link communicated, then according to the reception power of PPDU and/or PPDU, updates or modification network distribution is sweared Measure NAV.Compared with updating NAV by the method for the prior art at present, the node of space reuse link of the embodiment of the present invention according to Whether the PPDU of the sender node transmission of the link that is being communicated and the receiving end of communicating link are received The PPDU that node is sent, and can be according to the sender node or communicating link for receiving communicating link Receiving terminal node send the corresponding reception power of PPDU, update or modification NAV, rather than work as space reuse link hair When sending end node is respectively less than preset threshold value, NAV can be just updated or modify, so as to reduce the node of space reuse link The probability of NAV is updated or modified, and then the chance of space reuse data transmission can be improved.

It should be noted that other phases corresponding to each equipment in the expansion storage array provided in the embodiment of the present invention It should describe, can be with reference to the corresponding description in Fig. 1-Figure 22, details are not described herein.

Still further, the embodiment of the invention also provides a kind of update or the devices of modification NAV, as shown in figure 25, The device includes: processor 2501, transceiver 2502 and memory 2503, and processor 2501 passes through data/address bus and memory 2503 and transceiver 2502 connect.

Processor 2501, in the node of the first link, for monitoring the hair of the node in Overlapping Basic Service Set OBSS The physical layer convergence process protocol Data Unit PPDU sent.

Processor 2501, for the reception power according to PPDU and/or PPDU, updates in the node of the first link Or modification network allocation vector NAV.

Processor 2501 listens to the second chain specifically for the node when the first link in the node of the first link When the PPDU that the sender node on road is sent, the NAV being arranged is kept not update.

Processor 2501 listens to the second link specifically for the node when the first link positioned at the node of the first link Receiving terminal node send two PPDU when, according to receive the 2nd PPDU it is corresponding receive it is big between power and preset threshold value Small relationship and the 2nd PPDU carry the size relation between value and current NAV value in duration Duration field, Determine whether to update NAV.

Wherein, the preset threshold value is -82dBm, and clean channel estimating CCA threshold value, Overlapping Basic Service Set packet detect door Limit any one in OBSS packet detection level and signal sensitivity.

Processor 2501 is specifically used in the node of the first link when the corresponding reception power of the 2nd PPDU of reception Greater than preset threshold value, and the 2nd PPDU carries node of the value in duration Duration field greater than the first link When current NAV value, updating NAV is the value in Duration field.

Processor 2501 is also used to the transmission end segment according to the second link listened in the node of the first link Value and current NAV value in the first PPDU and the first PPDU that point is sent in the duration Duration field that carries it Between size relation, it is determined whether update NAV, Duration field is used to indicate the length of transmission opportunity duration TxOP.

Processor 2501, in the node of the first link, specifically for the node when first link according to listening to The first PPDU that the sender node of second link is sent, and the value in Duration field is greater than the node of the first link When current NAV value, updating NAV is the value in Duration field.

Processor 2501 is also used to listen to the second link when the node of the first link in the node of the first link Receiving terminal node send two PPDU when, according to receive the 2nd PPDU it is corresponding receive it is big between power and preset threshold value Small relationship, it is determined whether modify updated NAV.

Processor 2501 is specifically used in the node of the first link when the corresponding reception power of the 2nd PPDU of reception When less than preset threshold value, updated NAV is modified.

Processor 2501, in the node of the first link, specifically for the transmitting terminal according to the second link listened to The first PPDU that node is sent, update NAV are first time length.

Processor 2501, in the node of the first link, be also used to when the node of the first link listen to the second chain When two PPDU that the receiving terminal node on road is sent, according between corresponding reception power and the preset threshold value of the 2nd PPDU of reception Size relation, it is determined whether modify updated NAV.

Processor 2501 is also used to not hear the second chain when the node of the first link in the node of the first link The first PPDU that the sender node on road is sent, when listening only to two PPDU sent to the receiving terminal node of the second link, root According to the size relation received between the corresponding reception power of the 2nd PPDU and preset threshold value, it is determined whether update NAV.

Processor 2501 receives the corresponding reception function of the 2nd PPDU specifically for working as in the node of the first link When rate is greater than preset threshold value, NAV is updated.

Processor 2501 listens to connecing for the second link for the node when the first link positioned at the node of the first link When the trigger frame that receiving end node is sent, according to the corresponding size relation for receiving power and preset threshold value of trigger frame is received, determine Whether NAV is updated.

Processor 2501 is specifically used for big when receiving the corresponding reception power of trigger frame in the node of the first link When preset threshold value, NAV is updated.

Processor 2501 is specifically used for working as the corresponding reception power of reception trigger frame not in the node of the first link When greater than preset threshold value, the NAV being arranged is kept not update.

Processor 2501 is also used to listen to the second link when the node of the first link in the node of the first link Sender node send a PPDU when, keep updated NAV do not modify.

Transceiver 2502 is modified in the receiving terminal node of the first link for the receiving terminal node when the first link When NAV, and when the data frame that the sender node that the receiving terminal node of the first link receives the first link is sent, to first The sender node of link sends ACK frame.

Transceiver 2502 is also used to work as the receiving terminal node of the first link not in the receiving terminal node of the first link When modifying NAV, and when the data frame that the sender node that the receiving terminal node of the first link receives the first link is sent, no ACK frame is sent to the sender node of the first link.

It should be noted that in the update that is provided in the embodiment of the present invention or modification NAV corresponding to each equipment other Corresponding description, can be referring to figs. 1 to the corresponding description in Figure 22 any one, and details are not described herein.

The embodiment of the method for above-mentioned offer may be implemented in the device of update or modification NAV provided in an embodiment of the present invention, Concrete function realizes the explanation referred in embodiment of the method, and details are not described herein.It is provided in an embodiment of the present invention update or The receiving end of transmitting terminal and the first link that the method and device of modification NAV can be adapted for the first link updates or modification NAV, but it is not limited only to this.

Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with Instruct relevant hardware to complete by computer program, program can be stored in a computer-readable storage medium, The program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, storage medium can for magnetic disk, CD, Read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory, RAM) etc..

More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover Within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims

1. the method for a kind of update or modification NAV characterized by comprising

The node of first link monitors the physical layer convergence process protocol data that the node in Overlapping Basic Service Set OBSS is sent Node in unit PPDU, the OBSS includes: the sender node of the second link and the receiving terminal node of the second link, described First link is space reuse link, and second link is the link communicated；

The node of first link updates according to the reception power of the PPDU and/or PPDU or modification network divides With vector NAV；

The node of first link updates according to the reception power of the PPDU and/or PPDU or modification network divides It the step of with vector NAV, specifically includes:

If the node of first link listens to the first PPDU that the sender node of the second link is sent, first chain The node on road keeps the NAV being arranged not update, and the first PPDU includes: that request sends RTS frame and data Data frame.

2. the method for update according to claim 1 or modification NAV, which is characterized in that the node of first link The step of keeping the NAV being arranged not update, later further include:

If the node of first link listens to the 2nd PPDU that the receiving terminal node of second link is sent, the first chain The node on road is according to receiving the corresponding size relation received between power and preset threshold value of the 2nd PPDU and described the Two PPDU carry the size relation between value and current NAV value in duration Duration field, it is determined whether update NAV, the 2nd PPDU include: to allow to send CTS frame/enhancing to allow to send ECTS frame, receive confirmation ACK frame or uplink Data frame, the Duration field are used to indicate the length of transmission opportunity duration TxOP.

3. the method for update according to claim 2 or modification NAV, which is characterized in that the node of first link It is taken according to the size relation and the 2nd PPDU that receive between the corresponding reception power of the 2nd PPDU and preset threshold value With the size relation between the value and current NAV value in duration Duration field, it is determined whether update the step of NAV Suddenly, it specifically includes:

If the corresponding reception power of the 2nd PPDU of the reception is greater than the preset threshold value, and the 2nd PPDU is carried and is held Value in continuous time Duration field is greater than the current NAV value of the node of first link, then the section of first link It is the value in the Duration field that point, which updates the NAV,.

4. the method for update according to claim 1 or modification NAV, which is characterized in that the node of first link It is specific to wrap the step of updating or modify network allocation vector NAV according to the reception power of the PPDU and/or PPDU It includes:

The first PPDU that the node of first link is sent according to the sender node of second link listened to, and The size relation between the value and current NAV value in duration Duration field carried in first PPDU determines Whether the NAV is updated, and the Duration field is used to indicate the length of transmission opportunity duration TxOP.

5. the method for update according to claim 4 or modification NAV, which is characterized in that the node of first link What is carried in the first PPDU and the first PPDU sent according to the sender node of second link listened to holds The size relation between value and current NAV value in continuous time Duration field, it is determined whether the step of updating the NAV, It specifically includes:

If the first PPDU that the node of first link is sent according to the sender node of second link listened to, and And the value in the Duration field is greater than the current NAV value of the node of first link, the then section of first link It is the value in the Duration field that point, which updates the NAV,.

6. the method for update according to claim 5 or modification NAV, which is characterized in that if first link The first PPDU that is sent according to the sender node of second link listened to of node, and the Duration field In value be greater than first link node current NAV value, then NAV described in the node updates of first link is described The step of value in Duration field, later further include:

If the node of first link listens to the 2nd PPDU that the receiving terminal node of second link is sent, described the The node of one link is according to the corresponding size relation received between power and preset threshold value of the 2nd PPDU, determination is received The no updated NAV of modification.

7. the method for update according to claim 6 or modification NAV, which is characterized in that the node of first link According to the size relation received between the corresponding reception power of the 2nd PPDU and preset threshold value, it is determined whether after modification updates NAV the step of, specifically include:

If the corresponding reception power of the 2nd PPDU is less than the preset threshold value, described in the node modification of first link Updated NAV.

8. the method for update according to claim 1 or modification NAV, which is characterized in that the node of first link It is specific to wrap the step of updating or modify network allocation vector NAV according to the reception power of the PPDU and/or PPDU It includes:

If the node of first link listen to second link receiving terminal node send trigger frame, described first The node of link is according to the size relation for receiving the corresponding reception power and preset threshold value of the trigger frame, it is determined whether updates NAV；

If the corresponding reception power of the trigger frame that receives is greater than the preset threshold value, the node of first link is more The new NAV；

If the corresponding reception power of the trigger frame that receives is not more than the preset threshold value, the node of first link The NAV being arranged is kept not update.

9. it is according to claim 1-8 update or modification NAV method, which is characterized in that preset threshold value be- 82dBm, clean channel estimating CCA threshold value, Overlapping Basic Service Set packet detection threshold OBSS packet detection level And any one in signal sensitivity.

10. the method for update according to claim 1 or modification NAV, which is characterized in that the method also includes:

If the node of first link is the receiving terminal node of the first link, and the receiving terminal node of first link is repaired Change the NAV, then when the receiving terminal node of first link receive the first link sender node send data frame, The receiving terminal node of first link sends ACK frame to the sender node of first link；

If the node of first link is the receiving terminal node of the first link, and the receiving terminal node of first link is not The NAV is modified, then when the data that the sender node that the receiving terminal node of first link receives the first link is sent When frame, the receiving terminal node of first link does not send the ACK frame to the sender node of first link.

11. the device of a kind of update or modification NAV characterized by comprising

Monitoring unit, in the node of the first link, for monitoring the object of the transmission of the node in Overlapping Basic Service Set OBSS It manages layer and converges process protocol Data Unit PPDU, the node in the OBSS includes: the sender node and second of the second link The receiving terminal node of link, first link are space reuse links, and second link is the link communicated；

It updates or modification unit is used in the node of first link according to the PPDU and/or PPDU Reception power, update or modification network allocation vector NAV；

First update or modified module, in the node of first link, for working as the section of first link When the PPDU that the sender node that point listens to the second link is sent, the NAV being arranged is kept not update, described first PPDU includes: that request sends RTS frame and data Data frame.

12. the device of update according to claim 11 or modification NAV, which is characterized in that the update or modification Unit specifically includes: the first determining module:

First determining module listens to described for the node when first link positioned at the node of the first link When two PPDU that the receiving terminal node of two links is sent, according to the corresponding reception power of reception the 2nd PPDU and preset threshold Size relation and the 2nd PPDU between value carry value and current NAV value in duration Duration field Between size relation, it is determined whether update NAV, the 2nd PPDU include: allow send CTS frame/enhancing allow to send ECTS frame, reception confirmation ACK frame or uplink data frames, the Duration field are used to indicate transmission opportunity duration TxOP's Length.

13. the device of update according to claim 12 or modification NAV, it is characterised in that

First determining module is specifically used in the node of first link when the 2nd PPDU of the reception is corresponding Reception power be greater than the preset threshold value, and the value that the 2nd PPDU is carried in duration Duration field is big When the current NAV value of the node of first link, updating the NAV is the value in the Duration field.

14. the device of update according to claim 11 or modification NAV, which is characterized in that

First determining module is also used to the hair according to second link listened in the node of first link Value in the first PPDU and the first PPDU that sending end node is sent in the duration Duration field that carries with work as Size relation between preceding NAV value, it is determined whether the NAV is updated, when the Duration field is used to indicate transmission opportunity The length of long TxOP.

15. the device of update according to claim 14 or modification NAV, which is characterized in that

First determining module, in the node of first link, specifically for working as the node root of first link According to the first PPDU that the sender node of second link listened to is sent, and the value in the Duration field is big When the current NAV value of the node of first link, updating the NAV is the value in the Duration field.

16. the device of update according to claim 15 or modification NAV, which is characterized in that

First determining module is also used to monitor when the node of first link in the node of first link When two PPDU sent to the receiving terminal node of second link, according to receiving the corresponding reception power of the 2nd PPDU Size relation between preset threshold value, it is determined whether modify updated NAV.

17. the device of update according to claim 16 or modification NAV, which is characterized in that

First determining module, in the node of first link, specifically for being connect when the 2nd PPDU is corresponding When receiving power less than the preset threshold value, the updated NAV is modified.

18. the device of update according to claim 11 or modification NAV, which is characterized in that

First determining module listens to described for the node when first link positioned at the node of first link When the trigger frame that the receiving terminal nodes of two links is sent, according to receiving corresponding power and the preset threshold value of receiving of the trigger frame Size relation, it is determined whether update NAV；

First determining module is specifically used for receiving the trigger frame pair when described in the node of first link When the reception power answered is greater than the preset threshold value, the NAV is updated；

First determining module is specifically used for receiving the trigger frame pair when described in the node of first link When the reception power answered is not more than the preset threshold value, the NAV being arranged is kept not update.

19. the device of the described in any item updates of 1-18 or modification NAV according to claim 1, which is characterized in that preset threshold value For -82dBm, clean channel estimating CCA threshold value, Overlapping Basic Service Set packet detection threshold OBSS packet detection Any one in level and signal sensitivity.

20. the device of update according to claim 11 or modification NAV, which is characterized in that described device further include: hair Send unit；

The transmission unit is for the node when first link in the receiving terminal node of first link The receiving terminal node of one link, and when the receiving terminal node modification NAV of first link, and work as first link Receiving terminal node receive the first link sender node send data frame when, the transmission end segment of the first link of Xiang Suoshu Point sends ACK frame；

The transmission unit, in the receiving terminal node of first link, the node for being also used to work as first link is The receiving terminal node of first link, and when the receiving terminal node of first link does not modify the NAV, and work as described first When the data frame that the sender node that the receiving terminal node of link receives the first link is sent, not to the hair of first link Sending end node sends the ACK frame.